chiark / gitweb /
Prep v228: Add remaining updates from upstream (1/3)
authorSven Eden <yamakuzure@gmx.net>
Thu, 6 Apr 2017 12:52:36 +0000 (14:52 +0200)
committerSven Eden <yamakuzure@gmx.net>
Wed, 26 Apr 2017 10:59:13 +0000 (12:59 +0200)
The util.[hc] files have been stripped of a lot of functions, that
got sorted into various new files representing the type of
utility.

This commit adds the missing files.

46 files changed:
.gitignore
Makefile-man.am
Makefile.am
src/basic/alloc-util.c [new file with mode: 0644]
src/basic/alloc-util.h [new file with mode: 0644]
src/basic/audit-util.c [moved from src/basic/audit.c with 95% similarity]
src/basic/audit-util.h [moved from src/basic/audit.h with 96% similarity]
src/basic/capability-util.c [moved from src/basic/capability.c with 97% similarity]
src/basic/capability-util.h [moved from src/basic/capability.h with 77% similarity]
src/basic/dirent-util.c [new file with mode: 0644]
src/basic/dirent-util.h [new file with mode: 0644]
src/basic/escape.c [new file with mode: 0644]
src/basic/escape.h [new file with mode: 0644]
src/basic/extract-word.c [new file with mode: 0644]
src/basic/extract-word.h [new file with mode: 0644]
src/basic/fd-util.c [new file with mode: 0644]
src/basic/fd-util.h [new file with mode: 0644]
src/basic/fs-util.c [new file with mode: 0644]
src/basic/fs-util.h [new file with mode: 0644]
src/basic/hexdecoct.c [new file with mode: 0644]
src/basic/hexdecoct.h [new file with mode: 0644]
src/basic/io-util.c [new file with mode: 0644]
src/basic/io-util.h [new file with mode: 0644]
src/basic/locale-util.c [new file with mode: 0644]
src/basic/locale-util.h [new file with mode: 0644]
src/basic/mount-util.c [new file with mode: 0644]
src/basic/mount-util.h [new file with mode: 0644]
src/basic/parse-util.c [new file with mode: 0644]
src/basic/parse-util.h [new file with mode: 0644]
src/basic/proc-cmdline.c [new file with mode: 0644]
src/basic/proc-cmdline.h [moved from src/basic/label.h with 74% similarity]
src/basic/socket-util.c [new file with mode: 0644]
src/basic/stat-util.c [new file with mode: 0644]
src/basic/stat-util.h [new file with mode: 0644]
src/basic/stdio-util.h [new file with mode: 0644]
src/basic/string-table.c [new file with mode: 0644]
src/basic/string-table.h [new file with mode: 0644]
src/basic/string-util.c [new file with mode: 0644]
src/basic/string-util.h [new file with mode: 0644]
src/basic/syslog-util.c [new file with mode: 0644]
src/basic/syslog-util.h [new file with mode: 0644]
src/basic/umask-util.h [new file with mode: 0644]
src/basic/user-util.c [new file with mode: 0644]
src/basic/user-util.h [new file with mode: 0644]
src/basic/xattr-util.c [new file with mode: 0644]
src/basic/xattr-util.h [new file with mode: 0644]

index 61e52a6..a8c7713 100644 (file)
@@ -297,10 +297,14 @@ stamp-*
 
 
 # Local Helper Scripts and Tools - Not for distribution
-check_tree.sh
-cleanup*.sh
-elogind.*
-get_build_file_diff.sh
-pwx_*.*
-rebuild_all.sh
-
+patches/
+/check_*.*
+/cleanup*.sh
+/elogind.*
+/get_build_file_diff.sh
+/pwx_*.*
+/rebuild_all.sh
+*.orig
+*.rej
+*.remote
+*.bak
index 4d51eb4..1f0dce4 100644 (file)
@@ -163,15 +163,6 @@ man/sd_session_is_remote.html: man/sd_session_is_active.html
 
 endif
 
-if HAVE_PYTHON
-MANPAGES += \
-       man/elogind.index.7
-MANPAGES_ALIAS += \
-       #
-
-
-endif
-
 # Really, do not edit this file.
 
 EXTRA_DIST += \
index 7128d10..840e8f3 100644 (file)
@@ -297,10 +297,11 @@ libbasic_la_SOURCES = \
        src/basic/missing.h \
        src/basic/musl_missing.h \
        src/basic/musl_missing.c \
-       src/basic/capability.c \
-       src/basic/capability.h \
+       src/basic/capability-util.c \
+       src/basic/capability-util.h \
        src/basic/conf-files.c \
        src/basic/conf-files.h \
+       src/basic/stdio-util.h \
        src/basic/hostname-util.h \
        src/basic/hostname-util.c \
        src/basic/unit-name.c \
@@ -308,12 +309,47 @@ libbasic_la_SOURCES = \
        src/basic/unaligned.h \
        src/basic/util.c \
        src/basic/util.h \
+       src/basic/io-util.c \
+       src/basic/io-util.h \
+       src/basic/string-util.c \
+       src/basic/string-util.h \
+       src/basic/parse-util.c \
+       src/basic/parse-util.h \
+       src/basic/fd-util.c \
+       src/basic/fd-util.h \
+       src/basic/user-util.c \
+       src/basic/user-util.h \
+       src/basic/dirent-util.c \
+       src/basic/dirent-util.h \
+       src/basic/xattr-util.c \
+       src/basic/xattr-util.h \
+       src/basic/proc-cmdline.c \
+       src/basic/proc-cmdline.h \
+       src/basic/fs-util.c \
+       src/basic/fs-util.h \
+       src/basic/syslog-util.c \
+       src/basic/syslog-util.h \
+       src/basic/stat-util.c \
+       src/basic/stat-util.h \
+       src/basic/mount-util.c \
+       src/basic/mount-util.h \
+       src/basic/hexdecoct.c \
+       src/basic/hexdecoct.h \
+       src/basic/extract-word.c \
+       src/basic/extract-word.h \
+       src/basic/escape.c \
+       src/basic/escape.h \
        src/basic/path-util.c \
        src/basic/path-util.h \
        src/basic/time-util.c \
        src/basic/time-util.h \
+       src/basic/locale-util.c \
+       src/basic/locale-util.h \
+       src/basic/umask-util.h \
        src/basic/signal-util.c \
        src/basic/signal-util.h \
+       src/basic/string-table.c \
+       src/basic/string-table.h \
        src/basic/mempool.c \
        src/basic/mempool.h \
        src/basic/hashmap.c \
@@ -336,6 +372,8 @@ libbasic_la_SOURCES = \
        src/basic/utf8.h \
        src/basic/gunicode.c \
        src/basic/gunicode.h \
+       src/basic/socket-util.c \
+       src/basic/socket-util.h \
        src/basic/fileio.c \
        src/basic/fileio.h \
        src/basic/mkdir.c \
@@ -348,8 +386,8 @@ libbasic_la_SOURCES = \
        src/basic/terminal-util.h \
        src/basic/login-util.h \
        src/basic/login-util.c \
-       src/basic/audit.c \
-       src/basic/audit.h \
+       src/basic/audit-util.c \
+       src/basic/audit-util.h \
        src/basic/memfd-util.c \
        src/basic/memfd-util.h \
        src/basic/process-util.c \
@@ -369,6 +407,8 @@ libbasic_la_SOURCES = \
        src/basic/rm-rf.h \
        src/basic/copy.c \
        src/basic/copy.h \
+       src/basic/alloc-util.h \
+       src/basic/alloc-util.c \
        src/basic/parse-printf-format.c \
        src/basic/parse-printf-format.h
 
diff --git a/src/basic/alloc-util.c b/src/basic/alloc-util.c
new file mode 100644 (file)
index 0000000..48183e3
--- /dev/null
@@ -0,0 +1,81 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "util.h"
+
+void* memdup(const void *p, size_t l) {
+        void *r;
+
+        assert(p);
+
+        r = malloc(l);
+        if (!r)
+                return NULL;
+
+        memcpy(r, p, l);
+        return r;
+}
+
+void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size) {
+        size_t a, newalloc;
+        void *q;
+
+        assert(p);
+        assert(allocated);
+
+        if (*allocated >= need)
+                return *p;
+
+        newalloc = MAX(need * 2, 64u / size);
+        a = newalloc * size;
+
+        /* check for overflows */
+        if (a < size * need)
+                return NULL;
+
+        q = realloc(*p, a);
+        if (!q)
+                return NULL;
+
+        *p = q;
+        *allocated = newalloc;
+        return q;
+}
+
+void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) {
+        size_t prev;
+        uint8_t *q;
+
+        assert(p);
+        assert(allocated);
+
+        prev = *allocated;
+
+        q = greedy_realloc(p, allocated, need, size);
+        if (!q)
+                return NULL;
+
+        if (*allocated > prev)
+                memzero(q + prev * size, (*allocated - prev) * size);
+
+        return q;
+}
diff --git a/src/basic/alloc-util.h b/src/basic/alloc-util.h
new file mode 100644 (file)
index 0000000..12b602e
--- /dev/null
@@ -0,0 +1,108 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <alloca.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "macro.h"
+
+#define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))
+
+#define new0(t, n) ((t*) calloc((n), sizeof(t)))
+
+#define newa(t, n) ((t*) alloca(sizeof(t)*(n)))
+
+#define newa0(t, n) ((t*) alloca0(sizeof(t)*(n)))
+
+#define newdup(t, p, n) ((t*) memdup_multiply(p, sizeof(t), (n)))
+
+#define malloc0(n) (calloc(1, (n)))
+
+static inline void *mfree(void *memory) {
+        free(memory);
+        return NULL;
+}
+
+void* memdup(const void *p, size_t l) _alloc_(2);
+
+static inline void freep(void *p) {
+        free(*(void**) p);
+}
+
+#define _cleanup_free_ _cleanup_(freep)
+
+_malloc_  _alloc_(1, 2) static inline void *malloc_multiply(size_t a, size_t b) {
+        if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
+                return NULL;
+
+        return malloc(a * b);
+}
+
+_alloc_(2, 3) static inline void *realloc_multiply(void *p, size_t a, size_t b) {
+        if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
+                return NULL;
+
+        return realloc(p, a * b);
+}
+
+_alloc_(2, 3) static inline void *memdup_multiply(const void *p, size_t a, size_t b) {
+        if (_unlikely_(b != 0 && a > ((size_t) -1) / b))
+                return NULL;
+
+        return memdup(p, a * b);
+}
+
+void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size);
+void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size);
+
+#define GREEDY_REALLOC(array, allocated, need)                          \
+        greedy_realloc((void**) &(array), &(allocated), (need), sizeof((array)[0]))
+
+#define GREEDY_REALLOC0(array, allocated, need)                         \
+        greedy_realloc0((void**) &(array), &(allocated), (need), sizeof((array)[0]))
+
+#define alloca0(n)                                      \
+        ({                                              \
+                char *_new_;                            \
+                size_t _len_ = n;                       \
+                _new_ = alloca(_len_);                  \
+                (void *) memset(_new_, 0, _len_);       \
+        })
+
+/* It's not clear what alignment glibc/gcc alloca() guarantee, hence provide a guaranteed safe version */
+#define alloca_align(size, align)                                       \
+        ({                                                              \
+                void *_ptr_;                                            \
+                size_t _mask_ = (align) - 1;                            \
+                _ptr_ = alloca((size) + _mask_);                        \
+                (void*)(((uintptr_t)_ptr_ + _mask_) & ~_mask_);         \
+        })
+
+#define alloca0_align(size, align)                                      \
+        ({                                                              \
+                void *_new_;                                            \
+                size_t _size_ = (size);                                 \
+                _new_ = alloca_align(_size_, (align));                  \
+                (void*)memset(_new_, 0, _size_);                        \
+        })
similarity index 95%
rename from src/basic/audit.c
rename to src/basic/audit-util.c
index 9bf331c..4612297 100644 (file)
 #include <errno.h>
 #include <stdio.h>
 
+#include "alloc-util.h"
+#include "audit-util.h"
+#include "fd-util.h"
+#include "fileio.h"
 #include "macro.h"
-#include "audit.h"
-#include "util.h"
+#include "parse-util.h"
 #include "process-util.h"
-#include "fileio.h"
+#include "user-util.h"
+#include "util.h"
 
 int audit_session_from_pid(pid_t pid, uint32_t *id) {
         _cleanup_free_ char *s = NULL;
@@ -82,8 +86,6 @@ int audit_loginuid_from_pid(pid_t pid, uid_t *uid) {
         return 0;
 }
 
-/// UNNEEDED by elogind
-#if 0
 bool use_audit(void) {
         static int cached_use = -1;
 
@@ -101,4 +103,3 @@ bool use_audit(void) {
 
         return cached_use;
 }
-#endif // 0
similarity index 96%
rename from src/basic/audit.h
rename to src/basic/audit-util.h
index bc5f83b..6de331c 100644 (file)
@@ -30,4 +30,4 @@
 int audit_session_from_pid(pid_t pid, uint32_t *id);
 int audit_loginuid_from_pid(pid_t pid, uid_t *uid);
 
-// UNNEEDED bool use_audit(void);
+bool use_audit(void);
similarity index 97%
rename from src/basic/capability.c
rename to src/basic/capability-util.c
index 360c128..0eb5c03 100644 (file)
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <unistd.h>
 #include <errno.h>
+#include <grp.h>
 #include <stdio.h>
 #include <sys/capability.h>
 #include <sys/prctl.h>
-#include "grp.h"
+#include <unistd.h>
 
+#include "alloc-util.h"
+#include "capability-util.h"
+#include "fileio.h"
+#include "log.h"
 #include "macro.h"
+#include "parse-util.h"
 #include "util.h"
-#include "log.h"
-#include "fileio.h"
-#include "capability.h"
 
-/// UNNEEDED by elogind
-#if 0
 int have_effective_cap(int value) {
         _cleanup_cap_free_ cap_t cap;
         cap_flag_value_t fv;
@@ -47,7 +47,6 @@ int have_effective_cap(int value) {
         else
                 return fv == CAP_SET;
 }
-#endif // 0
 
 unsigned long cap_last_cap(void) {
         static thread_local unsigned long saved;
@@ -96,8 +95,6 @@ unsigned long cap_last_cap(void) {
         return p;
 }
 
-/// UNNEEDED by elogind
-#if 0
 int capability_bounding_set_drop(uint64_t drop, bool right_now) {
         _cleanup_cap_free_ cap_t after_cap = NULL;
         cap_flag_value_t fv;
@@ -281,10 +278,8 @@ int drop_privileges(uid_t uid, gid_t gid, uint64_t keep_capabilities) {
                 assert(keep_capabilities & (1ULL << (i - 1)));
 
                 if (cap_set_flag(d, CAP_EFFECTIVE, j, bits, CAP_SET) < 0 ||
-                    cap_set_flag(d, CAP_PERMITTED, j, bits, CAP_SET) < 0) {
-                        log_error_errno(errno, "Failed to enable capabilities bits: %m");
-                        return -errno;
-                }
+                    cap_set_flag(d, CAP_PERMITTED, j, bits, CAP_SET) < 0)
+                        return log_error_errno(errno, "Failed to enable capabilities bits: %m");
 
                 if (cap_set_proc(d) < 0)
                         return log_error_errno(errno, "Failed to increase capabilities: %m");
@@ -310,4 +305,3 @@ int drop_capability(cap_value_t cv) {
 
         return 0;
 }
-#endif // 0
similarity index 77%
rename from src/basic/capability.h
rename to src/basic/capability-util.h
index 137f606..4eb5c2a 100644 (file)
 #include "util.h"
 
 unsigned long cap_last_cap(void);
-// UNNEEDED int have_effective_cap(int value);
-// UNNEEDED int capability_bounding_set_drop(uint64_t drop, bool right_now);
-// UNNEEDED int capability_bounding_set_drop_usermode(uint64_t drop);
+int have_effective_cap(int value);
+int capability_bounding_set_drop(uint64_t drop, bool right_now);
+int capability_bounding_set_drop_usermode(uint64_t drop);
 
-// UNNEEDED int drop_privileges(uid_t uid, gid_t gid, uint64_t keep_capabilities);
+int drop_privileges(uid_t uid, gid_t gid, uint64_t keep_capabilities);
 
-// UNNEEDED int drop_capability(cap_value_t cv);
+int drop_capability(cap_value_t cv);
 
 DEFINE_TRIVIAL_CLEANUP_FUNC(cap_t, cap_free);
 #define _cleanup_cap_free_ _cleanup_(cap_freep)
diff --git a/src/basic/dirent-util.c b/src/basic/dirent-util.c
new file mode 100644 (file)
index 0000000..c433d58
--- /dev/null
@@ -0,0 +1,81 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010-2012 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "dirent-util.h"
+#include "string-util.h"
+
+int dirent_ensure_type(DIR *d, struct dirent *de) {
+        struct stat st;
+
+        assert(d);
+        assert(de);
+
+        if (de->d_type != DT_UNKNOWN)
+                return 0;
+
+        if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
+                return -errno;
+
+        de->d_type =
+                S_ISREG(st.st_mode)  ? DT_REG  :
+                S_ISDIR(st.st_mode)  ? DT_DIR  :
+                S_ISLNK(st.st_mode)  ? DT_LNK  :
+                S_ISFIFO(st.st_mode) ? DT_FIFO :
+                S_ISSOCK(st.st_mode) ? DT_SOCK :
+                S_ISCHR(st.st_mode)  ? DT_CHR  :
+                S_ISBLK(st.st_mode)  ? DT_BLK  :
+                                       DT_UNKNOWN;
+
+        return 0;
+}
+
+bool dirent_is_file(const struct dirent *de) {
+        assert(de);
+
+        if (hidden_file(de->d_name))
+                return false;
+
+        if (de->d_type != DT_REG &&
+            de->d_type != DT_LNK &&
+            de->d_type != DT_UNKNOWN)
+                return false;
+
+        return true;
+}
+
+bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) {
+        assert(de);
+
+        if (de->d_type != DT_REG &&
+            de->d_type != DT_LNK &&
+            de->d_type != DT_UNKNOWN)
+                return false;
+
+        if (hidden_file_allow_backup(de->d_name))
+                return false;
+
+        return endswith(de->d_name, suffix);
+}
diff --git a/src/basic/dirent-util.h b/src/basic/dirent-util.h
new file mode 100644 (file)
index 0000000..5866a75
--- /dev/null
@@ -0,0 +1,51 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <dirent.h>
+
+#include "path-util.h"
+
+int dirent_ensure_type(DIR *d, struct dirent *de);
+
+bool dirent_is_file(const struct dirent *de) _pure_;
+bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) _pure_;
+
+#define FOREACH_DIRENT(de, d, on_error)                                 \
+        for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d))   \
+                if (!de) {                                              \
+                        if (errno > 0) {                                \
+                                on_error;                               \
+                        }                                               \
+                        break;                                          \
+                } else if (hidden_file((de)->d_name))                   \
+                        continue;                                       \
+                else
+
+#define FOREACH_DIRENT_ALL(de, d, on_error)                             \
+        for (errno = 0, de = readdir(d);; errno = 0, de = readdir(d))   \
+                if (!de) {                                              \
+                        if (errno > 0) {                                \
+                                on_error;                               \
+                        }                                               \
+                        break;                                          \
+                } else
diff --git a/src/basic/escape.c b/src/basic/escape.c
new file mode 100644 (file)
index 0000000..4815161
--- /dev/null
@@ -0,0 +1,482 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "escape.h"
+#include "hexdecoct.h"
+#include "string-util.h"
+#include "utf8.h"
+#include "util.h"
+
+size_t cescape_char(char c, char *buf) {
+        char * buf_old = buf;
+
+        switch (c) {
+
+                case '\a':
+                        *(buf++) = '\\';
+                        *(buf++) = 'a';
+                        break;
+                case '\b':
+                        *(buf++) = '\\';
+                        *(buf++) = 'b';
+                        break;
+                case '\f':
+                        *(buf++) = '\\';
+                        *(buf++) = 'f';
+                        break;
+                case '\n':
+                        *(buf++) = '\\';
+                        *(buf++) = 'n';
+                        break;
+                case '\r':
+                        *(buf++) = '\\';
+                        *(buf++) = 'r';
+                        break;
+                case '\t':
+                        *(buf++) = '\\';
+                        *(buf++) = 't';
+                        break;
+                case '\v':
+                        *(buf++) = '\\';
+                        *(buf++) = 'v';
+                        break;
+                case '\\':
+                        *(buf++) = '\\';
+                        *(buf++) = '\\';
+                        break;
+                case '"':
+                        *(buf++) = '\\';
+                        *(buf++) = '"';
+                        break;
+                case '\'':
+                        *(buf++) = '\\';
+                        *(buf++) = '\'';
+                        break;
+
+                default:
+                        /* For special chars we prefer octal over
+                         * hexadecimal encoding, simply because glib's
+                         * g_strescape() does the same */
+                        if ((c < ' ') || (c >= 127)) {
+                                *(buf++) = '\\';
+                                *(buf++) = octchar((unsigned char) c >> 6);
+                                *(buf++) = octchar((unsigned char) c >> 3);
+                                *(buf++) = octchar((unsigned char) c);
+                        } else
+                                *(buf++) = c;
+                        break;
+        }
+
+        return buf - buf_old;
+}
+
+char *cescape(const char *s) {
+        char *r, *t;
+        const char *f;
+
+        assert(s);
+
+        /* Does C style string escaping. May be reversed with
+         * cunescape(). */
+
+        r = new(char, strlen(s)*4 + 1);
+        if (!r)
+                return NULL;
+
+        for (f = s, t = r; *f; f++)
+                t += cescape_char(*f, t);
+
+        *t = 0;
+
+        return r;
+}
+
+int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode) {
+        int r = 1;
+
+        assert(p);
+        assert(*p);
+        assert(ret);
+
+        /* Unescapes C style. Returns the unescaped character in ret,
+         * unless we encountered a \u sequence in which case the full
+         * unicode character is returned in ret_unicode, instead. */
+
+        if (length != (size_t) -1 && length < 1)
+                return -EINVAL;
+
+        switch (p[0]) {
+
+        case 'a':
+                *ret = '\a';
+                break;
+        case 'b':
+                *ret = '\b';
+                break;
+        case 'f':
+                *ret = '\f';
+                break;
+        case 'n':
+                *ret = '\n';
+                break;
+        case 'r':
+                *ret = '\r';
+                break;
+        case 't':
+                *ret = '\t';
+                break;
+        case 'v':
+                *ret = '\v';
+                break;
+        case '\\':
+                *ret = '\\';
+                break;
+        case '"':
+                *ret = '"';
+                break;
+        case '\'':
+                *ret = '\'';
+                break;
+
+        case 's':
+                /* This is an extension of the XDG syntax files */
+                *ret = ' ';
+                break;
+
+        case 'x': {
+                /* hexadecimal encoding */
+                int a, b;
+
+                if (length != (size_t) -1 && length < 3)
+                        return -EINVAL;
+
+                a = unhexchar(p[1]);
+                if (a < 0)
+                        return -EINVAL;
+
+                b = unhexchar(p[2]);
+                if (b < 0)
+                        return -EINVAL;
+
+                /* Don't allow NUL bytes */
+                if (a == 0 && b == 0)
+                        return -EINVAL;
+
+                *ret = (char) ((a << 4U) | b);
+                r = 3;
+                break;
+        }
+
+        case 'u': {
+                /* C++11 style 16bit unicode */
+
+                int a[4];
+                unsigned i;
+                uint32_t c;
+
+                if (length != (size_t) -1 && length < 5)
+                        return -EINVAL;
+
+                for (i = 0; i < 4; i++) {
+                        a[i] = unhexchar(p[1 + i]);
+                        if (a[i] < 0)
+                                return a[i];
+                }
+
+                c = ((uint32_t) a[0] << 12U) | ((uint32_t) a[1] << 8U) | ((uint32_t) a[2] << 4U) | (uint32_t) a[3];
+
+                /* Don't allow 0 chars */
+                if (c == 0)
+                        return -EINVAL;
+
+                if (c < 128)
+                        *ret = c;
+                else {
+                        if (!ret_unicode)
+                                return -EINVAL;
+
+                        *ret = 0;
+                        *ret_unicode = c;
+                }
+
+                r = 5;
+                break;
+        }
+
+        case 'U': {
+                /* C++11 style 32bit unicode */
+
+                int a[8];
+                unsigned i;
+                uint32_t c;
+
+                if (length != (size_t) -1 && length < 9)
+                        return -EINVAL;
+
+                for (i = 0; i < 8; i++) {
+                        a[i] = unhexchar(p[1 + i]);
+                        if (a[i] < 0)
+                                return a[i];
+                }
+
+                c = ((uint32_t) a[0] << 28U) | ((uint32_t) a[1] << 24U) | ((uint32_t) a[2] << 20U) | ((uint32_t) a[3] << 16U) |
+                    ((uint32_t) a[4] << 12U) | ((uint32_t) a[5] <<  8U) | ((uint32_t) a[6] <<  4U) |  (uint32_t) a[7];
+
+                /* Don't allow 0 chars */
+                if (c == 0)
+                        return -EINVAL;
+
+                /* Don't allow invalid code points */
+                if (!unichar_is_valid(c))
+                        return -EINVAL;
+
+                if (c < 128)
+                        *ret = c;
+                else {
+                        if (!ret_unicode)
+                                return -EINVAL;
+
+                        *ret = 0;
+                        *ret_unicode = c;
+                }
+
+                r = 9;
+                break;
+        }
+
+        case '0':
+        case '1':
+        case '2':
+        case '3':
+        case '4':
+        case '5':
+        case '6':
+        case '7': {
+                /* octal encoding */
+                int a, b, c;
+                uint32_t m;
+
+                if (length != (size_t) -1 && length < 3)
+                        return -EINVAL;
+
+                a = unoctchar(p[0]);
+                if (a < 0)
+                        return -EINVAL;
+
+                b = unoctchar(p[1]);
+                if (b < 0)
+                        return -EINVAL;
+
+                c = unoctchar(p[2]);
+                if (c < 0)
+                        return -EINVAL;
+
+                /* don't allow NUL bytes */
+                if (a == 0 && b == 0 && c == 0)
+                        return -EINVAL;
+
+                /* Don't allow bytes above 255 */
+                m = ((uint32_t) a << 6U) | ((uint32_t) b << 3U) | (uint32_t) c;
+                if (m > 255)
+                        return -EINVAL;
+
+                *ret = m;
+                r = 3;
+                break;
+        }
+
+        default:
+                return -EINVAL;
+        }
+
+        return r;
+}
+
+int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret) {
+        char *r, *t;
+        const char *f;
+        size_t pl;
+
+        assert(s);
+        assert(ret);
+
+        /* Undoes C style string escaping, and optionally prefixes it. */
+
+        pl = prefix ? strlen(prefix) : 0;
+
+        r = new(char, pl+length+1);
+        if (!r)
+                return -ENOMEM;
+
+        if (prefix)
+                memcpy(r, prefix, pl);
+
+        for (f = s, t = r + pl; f < s + length; f++) {
+                size_t remaining;
+                uint32_t u;
+                char c;
+                int k;
+
+                remaining = s + length - f;
+                assert(remaining > 0);
+
+                if (*f != '\\') {
+                        /* A literal literal, copy verbatim */
+                        *(t++) = *f;
+                        continue;
+                }
+
+                if (remaining == 1) {
+                        if (flags & UNESCAPE_RELAX) {
+                                /* A trailing backslash, copy verbatim */
+                                *(t++) = *f;
+                                continue;
+                        }
+
+                        free(r);
+                        return -EINVAL;
+                }
+
+                k = cunescape_one(f + 1, remaining - 1, &c, &u);
+                if (k < 0) {
+                        if (flags & UNESCAPE_RELAX) {
+                                /* Invalid escape code, let's take it literal then */
+                                *(t++) = '\\';
+                                continue;
+                        }
+
+                        free(r);
+                        return k;
+                }
+
+                if (c != 0)
+                        /* Non-Unicode? Let's encode this directly */
+                        *(t++) = c;
+                else
+                        /* Unicode? Then let's encode this in UTF-8 */
+                        t += utf8_encode_unichar(t, u);
+
+                f += k;
+        }
+
+        *t = 0;
+
+        *ret = r;
+        return t - r;
+}
+
+int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret) {
+        return cunescape_length_with_prefix(s, length, NULL, flags, ret);
+}
+
+int cunescape(const char *s, UnescapeFlags flags, char **ret) {
+        return cunescape_length(s, strlen(s), flags, ret);
+}
+
+char *xescape(const char *s, const char *bad) {
+        char *r, *t;
+        const char *f;
+
+        /* Escapes all chars in bad, in addition to \ and all special
+         * chars, in \xFF style escaping. May be reversed with
+         * cunescape(). */
+
+        r = new(char, strlen(s) * 4 + 1);
+        if (!r)
+                return NULL;
+
+        for (f = s, t = r; *f; f++) {
+
+                if ((*f < ' ') || (*f >= 127) ||
+                    (*f == '\\') || strchr(bad, *f)) {
+                        *(t++) = '\\';
+                        *(t++) = 'x';
+                        *(t++) = hexchar(*f >> 4);
+                        *(t++) = hexchar(*f);
+                } else
+                        *(t++) = *f;
+        }
+
+        *t = 0;
+
+        return r;
+}
+
+static char *strcpy_backslash_escaped(char *t, const char *s, const char *bad) {
+        assert(bad);
+
+        for (; *s; s++) {
+                if (*s == '\\' || strchr(bad, *s))
+                        *(t++) = '\\';
+
+                *(t++) = *s;
+        }
+
+        return t;
+}
+
+char *shell_escape(const char *s, const char *bad) {
+        char *r, *t;
+
+        r = new(char, strlen(s)*2+1);
+        if (!r)
+                return NULL;
+
+        t = strcpy_backslash_escaped(r, s, bad);
+        *t = 0;
+
+        return r;
+}
+
+char *shell_maybe_quote(const char *s) {
+        const char *p;
+        char *r, *t;
+
+        assert(s);
+
+        /* Encloses a string in double quotes if necessary to make it
+         * OK as shell string. */
+
+        for (p = s; *p; p++)
+                if (*p <= ' ' ||
+                    *p >= 127 ||
+                    strchr(SHELL_NEED_QUOTES, *p))
+                        break;
+
+        if (!*p)
+                return strdup(s);
+
+        r = new(char, 1+strlen(s)*2+1+1);
+        if (!r)
+                return NULL;
+
+        t = r;
+        *(t++) = '"';
+        t = mempcpy(t, s, p - s);
+
+        t = strcpy_backslash_escaped(t, p, SHELL_NEED_ESCAPE);
+
+        *(t++)= '"';
+        *t = 0;
+
+        return r;
+}
diff --git a/src/basic/escape.h b/src/basic/escape.h
new file mode 100644 (file)
index 0000000..85ba909
--- /dev/null
@@ -0,0 +1,48 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sys/types.h>
+#include <inttypes.h>
+
+/* What characters are special in the shell? */
+/* must be escaped outside and inside double-quotes */
+#define SHELL_NEED_ESCAPE "\"\\`$"
+/* can be escaped or double-quoted */
+#define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
+
+typedef enum UnescapeFlags {
+        UNESCAPE_RELAX = 1,
+} UnescapeFlags;
+
+char *cescape(const char *s);
+size_t cescape_char(char c, char *buf);
+
+int cunescape(const char *s, UnescapeFlags flags, char **ret);
+int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret);
+int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret);
+int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode);
+
+char *xescape(const char *s, const char *bad);
+
+char *shell_escape(const char *s, const char *bad);
+char *shell_maybe_quote(const char *s);
diff --git a/src/basic/extract-word.c b/src/basic/extract-word.c
new file mode 100644 (file)
index 0000000..a03bb92
--- /dev/null
@@ -0,0 +1,292 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "escape.h"
+#include "extract-word.h"
+#include "string-util.h"
+#include "utf8.h"
+#include "util.h"
+
+int extract_first_word(const char **p, char **ret, const char *separators, ExtractFlags flags) {
+        _cleanup_free_ char *s = NULL;
+        size_t allocated = 0, sz = 0;
+        char c;
+        int r;
+
+        char quote = 0;                 /* 0 or ' or " */
+        bool backslash = false;         /* whether we've just seen a backslash */
+
+        assert(p);
+        assert(ret);
+
+        /* Bail early if called after last value or with no input */
+        if (!*p)
+                goto finish_force_terminate;
+        c = **p;
+
+        if (!separators)
+                separators = WHITESPACE;
+
+        /* Parses the first word of a string, and returns it in
+         * *ret. Removes all quotes in the process. When parsing fails
+         * (because of an uneven number of quotes or similar), leaves
+         * the pointer *p at the first invalid character. */
+
+        if (flags & EXTRACT_DONT_COALESCE_SEPARATORS)
+                if (!GREEDY_REALLOC(s, allocated, sz+1))
+                        return -ENOMEM;
+
+        for (;; (*p) ++, c = **p) {
+                if (c == 0)
+                        goto finish_force_terminate;
+                else if (strchr(separators, c)) {
+                        if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) {
+                                (*p) ++;
+                                goto finish_force_next;
+                        }
+                } else {
+                        /* We found a non-blank character, so we will always
+                         * want to return a string (even if it is empty),
+                         * allocate it here. */
+                        if (!GREEDY_REALLOC(s, allocated, sz+1))
+                                return -ENOMEM;
+                        break;
+                }
+        }
+
+        for (;; (*p) ++, c = **p) {
+                if (backslash) {
+                        if (!GREEDY_REALLOC(s, allocated, sz+7))
+                                return -ENOMEM;
+
+                        if (c == 0) {
+                                if ((flags & EXTRACT_CUNESCAPE_RELAX) &&
+                                    (!quote || flags & EXTRACT_RELAX)) {
+                                        /* If we find an unquoted trailing backslash and we're in
+                                         * EXTRACT_CUNESCAPE_RELAX mode, keep it verbatim in the
+                                         * output.
+                                         *
+                                         * Unbalanced quotes will only be allowed in EXTRACT_RELAX
+                                         * mode, EXTRACT_CUNESCAPE_RELAX mode does not allow them.
+                                         */
+                                        s[sz++] = '\\';
+                                        goto finish_force_terminate;
+                                }
+                                if (flags & EXTRACT_RELAX)
+                                        goto finish_force_terminate;
+                                return -EINVAL;
+                        }
+
+                        if (flags & EXTRACT_CUNESCAPE) {
+                                uint32_t u;
+
+                                r = cunescape_one(*p, (size_t) -1, &c, &u);
+                                if (r < 0) {
+                                        if (flags & EXTRACT_CUNESCAPE_RELAX) {
+                                                s[sz++] = '\\';
+                                                s[sz++] = c;
+                                        } else
+                                                return -EINVAL;
+                                } else {
+                                        (*p) += r - 1;
+
+                                        if (c != 0)
+                                                s[sz++] = c; /* normal explicit char */
+                                        else
+                                                sz += utf8_encode_unichar(s + sz, u); /* unicode chars we'll encode as utf8 */
+                                }
+                        } else
+                                s[sz++] = c;
+
+                        backslash = false;
+
+                } else if (quote) {     /* inside either single or double quotes */
+                        for (;; (*p) ++, c = **p) {
+                                if (c == 0) {
+                                        if (flags & EXTRACT_RELAX)
+                                                goto finish_force_terminate;
+                                        return -EINVAL;
+                                } else if (c == quote) {        /* found the end quote */
+                                        quote = 0;
+                                        break;
+                                } else if (c == '\\' && !(flags & EXTRACT_RETAIN_ESCAPE)) {
+                                        backslash = true;
+                                        break;
+                                } else {
+                                        if (!GREEDY_REALLOC(s, allocated, sz+2))
+                                                return -ENOMEM;
+
+                                        s[sz++] = c;
+                                }
+                        }
+
+                } else {
+                        for (;; (*p) ++, c = **p) {
+                                if (c == 0)
+                                        goto finish_force_terminate;
+                                else if ((c == '\'' || c == '"') && (flags & EXTRACT_QUOTES)) {
+                                        quote = c;
+                                        break;
+                                } else if (c == '\\' && !(flags & EXTRACT_RETAIN_ESCAPE)) {
+                                        backslash = true;
+                                        break;
+                                } else if (strchr(separators, c)) {
+                                        if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) {
+                                                (*p) ++;
+                                                goto finish_force_next;
+                                        }
+                                        /* Skip additional coalesced separators. */
+                                        for (;; (*p) ++, c = **p) {
+                                                if (c == 0)
+                                                        goto finish_force_terminate;
+                                                if (!strchr(separators, c))
+                                                        break;
+                                        }
+                                        goto finish;
+
+                                } else {
+                                        if (!GREEDY_REALLOC(s, allocated, sz+2))
+                                                return -ENOMEM;
+
+                                        s[sz++] = c;
+                                }
+                        }
+                }
+        }
+
+finish_force_terminate:
+        *p = NULL;
+finish:
+        if (!s) {
+                *p = NULL;
+                *ret = NULL;
+                return 0;
+        }
+
+finish_force_next:
+        s[sz] = 0;
+        *ret = s;
+        s = NULL;
+
+        return 1;
+}
+
+/// UNNEEDED by elogind
+#if 0
+int extract_first_word_and_warn(
+                const char **p,
+                char **ret,
+                const char *separators,
+                ExtractFlags flags,
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *rvalue) {
+
+        /* Try to unquote it, if it fails, warn about it and try again
+         * but this time using EXTRACT_CUNESCAPE_RELAX to keep the
+         * backslashes verbatim in invalid escape sequences. */
+
+        const char *save;
+        int r;
+
+        save = *p;
+        r = extract_first_word(p, ret, separators, flags);
+        if (r >= 0)
+                return r;
+
+        if (r == -EINVAL && !(flags & EXTRACT_CUNESCAPE_RELAX)) {
+
+                /* Retry it with EXTRACT_CUNESCAPE_RELAX. */
+                *p = save;
+                r = extract_first_word(p, ret, separators, flags|EXTRACT_CUNESCAPE_RELAX);
+                if (r >= 0) {
+                        /* It worked this time, hence it must have been an invalid escape sequence we could correct. */
+                        log_syntax(unit, LOG_WARNING, filename, line, EINVAL, "Invalid escape sequences in line, correcting: \"%s\"", rvalue);
+                        return r;
+                }
+
+                /* If it's still EINVAL; then it must be unbalanced quoting, report this. */
+                if (r == -EINVAL)
+                        return log_syntax(unit, LOG_ERR, filename, line, r, "Unbalanced quoting, ignoring: \"%s\"", rvalue);
+        }
+
+        /* Can be any error, report it */
+        return log_syntax(unit, LOG_ERR, filename, line, r, "Unable to decode word \"%s\", ignoring: %m", rvalue);
+}
+
+int extract_many_words(const char **p, const char *separators, ExtractFlags flags, ...) {
+        va_list ap;
+        char **l;
+        int n = 0, i, c, r;
+
+        /* Parses a number of words from a string, stripping any
+         * quotes if necessary. */
+
+        assert(p);
+
+        /* Count how many words are expected */
+        va_start(ap, flags);
+        for (;;) {
+                if (!va_arg(ap, char **))
+                        break;
+                n++;
+        }
+        va_end(ap);
+
+        if (n <= 0)
+                return 0;
+
+        /* Read all words into a temporary array */
+        l = newa0(char*, n);
+        for (c = 0; c < n; c++) {
+
+                r = extract_first_word(p, &l[c], separators, flags);
+                if (r < 0) {
+                        int j;
+
+                        for (j = 0; j < c; j++)
+                                free(l[j]);
+
+                        return r;
+                }
+
+                if (r == 0)
+                        break;
+        }
+
+        /* If we managed to parse all words, return them in the passed
+         * in parameters */
+        va_start(ap, flags);
+        for (i = 0; i < n; i++) {
+                char **v;
+
+                v = va_arg(ap, char **);
+                assert(v);
+
+                *v = l[i];
+        }
+        va_end(ap);
+
+        return c;
+}
+#endif // 0
diff --git a/src/basic/extract-word.h b/src/basic/extract-word.h
new file mode 100644 (file)
index 0000000..eb33224
--- /dev/null
@@ -0,0 +1,37 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "macro.h"
+
+typedef enum ExtractFlags {
+        EXTRACT_RELAX                    = 1,
+        EXTRACT_CUNESCAPE                = 2,
+        EXTRACT_CUNESCAPE_RELAX          = 4,
+        EXTRACT_QUOTES                   = 8,
+        EXTRACT_DONT_COALESCE_SEPARATORS = 16,
+        EXTRACT_RETAIN_ESCAPE            = 32,
+} ExtractFlags;
+
+int extract_first_word(const char **p, char **ret, const char *separators, ExtractFlags flags);
+// UNNEEDED int extract_first_word_and_warn(const char **p, char **ret, const char *separators, ExtractFlags flags, const char *unit, const char *filename, unsigned line, const char *rvalue);
+// UNNEEDED int extract_many_words(const char **p, const char *separators, ExtractFlags flags, ...) _sentinel_;
diff --git a/src/basic/fd-util.c b/src/basic/fd-util.c
new file mode 100644 (file)
index 0000000..d1b1db3
--- /dev/null
@@ -0,0 +1,351 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "dirent-util.h"
+#include "fd-util.h"
+#include "parse-util.h"
+#include "socket-util.h"
+#include "util.h"
+
+int close_nointr(int fd) {
+        assert(fd >= 0);
+
+        if (close(fd) >= 0)
+                return 0;
+
+        /*
+         * Just ignore EINTR; a retry loop is the wrong thing to do on
+         * Linux.
+         *
+         * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html
+         * https://bugzilla.gnome.org/show_bug.cgi?id=682819
+         * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR
+         * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain
+         */
+        if (errno == EINTR)
+                return 0;
+
+        return -errno;
+}
+
+int safe_close(int fd) {
+
+        /*
+         * Like close_nointr() but cannot fail. Guarantees errno is
+         * unchanged. Is a NOP with negative fds passed, and returns
+         * -1, so that it can be used in this syntax:
+         *
+         * fd = safe_close(fd);
+         */
+
+        if (fd >= 0) {
+                PROTECT_ERRNO;
+
+                /* The kernel might return pretty much any error code
+                 * via close(), but the fd will be closed anyway. The
+                 * only condition we want to check for here is whether
+                 * the fd was invalid at all... */
+
+                assert_se(close_nointr(fd) != -EBADF);
+        }
+
+        return -1;
+}
+
+void safe_close_pair(int p[]) {
+        assert(p);
+
+        if (p[0] == p[1]) {
+                /* Special case pairs which use the same fd in both
+                 * directions... */
+                p[0] = p[1] = safe_close(p[0]);
+                return;
+        }
+
+        p[0] = safe_close(p[0]);
+        p[1] = safe_close(p[1]);
+}
+
+void close_many(const int fds[], unsigned n_fd) {
+        unsigned i;
+
+        assert(fds || n_fd <= 0);
+
+        for (i = 0; i < n_fd; i++)
+                safe_close(fds[i]);
+}
+
+int fclose_nointr(FILE *f) {
+        assert(f);
+
+        /* Same as close_nointr(), but for fclose() */
+
+        if (fclose(f) == 0)
+                return 0;
+
+        if (errno == EINTR)
+                return 0;
+
+        return -errno;
+}
+
+FILE* safe_fclose(FILE *f) {
+
+        /* Same as safe_close(), but for fclose() */
+
+        if (f) {
+                PROTECT_ERRNO;
+
+                assert_se(fclose_nointr(f) != EBADF);
+        }
+
+        return NULL;
+}
+
+DIR* safe_closedir(DIR *d) {
+
+        if (d) {
+                PROTECT_ERRNO;
+
+                assert_se(closedir(d) >= 0 || errno != EBADF);
+        }
+
+        return NULL;
+}
+
+int fd_nonblock(int fd, bool nonblock) {
+        int flags, nflags;
+
+        assert(fd >= 0);
+
+        flags = fcntl(fd, F_GETFL, 0);
+        if (flags < 0)
+                return -errno;
+
+        if (nonblock)
+                nflags = flags | O_NONBLOCK;
+        else
+                nflags = flags & ~O_NONBLOCK;
+
+        if (nflags == flags)
+                return 0;
+
+        if (fcntl(fd, F_SETFL, nflags) < 0)
+                return -errno;
+
+        return 0;
+}
+
+int fd_cloexec(int fd, bool cloexec) {
+        int flags, nflags;
+
+        assert(fd >= 0);
+
+        flags = fcntl(fd, F_GETFD, 0);
+        if (flags < 0)
+                return -errno;
+
+        if (cloexec)
+                nflags = flags | FD_CLOEXEC;
+        else
+                nflags = flags & ~FD_CLOEXEC;
+
+        if (nflags == flags)
+                return 0;
+
+        if (fcntl(fd, F_SETFD, nflags) < 0)
+                return -errno;
+
+        return 0;
+}
+
+_pure_ static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) {
+        unsigned i;
+
+        assert(n_fdset == 0 || fdset);
+
+        for (i = 0; i < n_fdset; i++)
+                if (fdset[i] == fd)
+                        return true;
+
+        return false;
+}
+
+int close_all_fds(const int except[], unsigned n_except) {
+        _cleanup_closedir_ DIR *d = NULL;
+        struct dirent *de;
+        int r = 0;
+
+        assert(n_except == 0 || except);
+
+        d = opendir("/proc/self/fd");
+        if (!d) {
+                int fd;
+                struct rlimit rl;
+
+                /* When /proc isn't available (for example in chroots)
+                 * the fallback is brute forcing through the fd
+                 * table */
+
+                assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0);
+                for (fd = 3; fd < (int) rl.rlim_max; fd ++) {
+
+                        if (fd_in_set(fd, except, n_except))
+                                continue;
+
+                        if (close_nointr(fd) < 0)
+                                if (errno != EBADF && r == 0)
+                                        r = -errno;
+                }
+
+                return r;
+        }
+
+        while ((de = readdir(d))) {
+                int fd = -1;
+
+                if (hidden_file(de->d_name))
+                        continue;
+
+                if (safe_atoi(de->d_name, &fd) < 0)
+                        /* Let's better ignore this, just in case */
+                        continue;
+
+                if (fd < 3)
+                        continue;
+
+                if (fd == dirfd(d))
+                        continue;
+
+                if (fd_in_set(fd, except, n_except))
+                        continue;
+
+                if (close_nointr(fd) < 0) {
+                        /* Valgrind has its own FD and doesn't want to have it closed */
+                        if (errno != EBADF && r == 0)
+                                r = -errno;
+                }
+        }
+
+        return r;
+}
+
+int same_fd(int a, int b) {
+        struct stat sta, stb;
+        pid_t pid;
+        int r, fa, fb;
+
+        assert(a >= 0);
+        assert(b >= 0);
+
+        /* Compares two file descriptors. Note that semantics are
+         * quite different depending on whether we have kcmp() or we
+         * don't. If we have kcmp() this will only return true for
+         * dup()ed file descriptors, but not otherwise. If we don't
+         * have kcmp() this will also return true for two fds of the same
+         * file, created by separate open() calls. Since we use this
+         * call mostly for filtering out duplicates in the fd store
+         * this difference hopefully doesn't matter too much. */
+
+        if (a == b)
+                return true;
+
+        /* Try to use kcmp() if we have it. */
+        pid = getpid();
+        r = kcmp(pid, pid, KCMP_FILE, a, b);
+        if (r == 0)
+                return true;
+        if (r > 0)
+                return false;
+        if (errno != ENOSYS)
+                return -errno;
+
+        /* We don't have kcmp(), use fstat() instead. */
+        if (fstat(a, &sta) < 0)
+                return -errno;
+
+        if (fstat(b, &stb) < 0)
+                return -errno;
+
+        if ((sta.st_mode & S_IFMT) != (stb.st_mode & S_IFMT))
+                return false;
+
+        /* We consider all device fds different, since two device fds
+         * might refer to quite different device contexts even though
+         * they share the same inode and backing dev_t. */
+
+        if (S_ISCHR(sta.st_mode) || S_ISBLK(sta.st_mode))
+                return false;
+
+        if (sta.st_dev != stb.st_dev || sta.st_ino != stb.st_ino)
+                return false;
+
+        /* The fds refer to the same inode on disk, let's also check
+         * if they have the same fd flags. This is useful to
+         * distinguish the read and write side of a pipe created with
+         * pipe(). */
+        fa = fcntl(a, F_GETFL);
+        if (fa < 0)
+                return -errno;
+
+        fb = fcntl(b, F_GETFL);
+        if (fb < 0)
+                return -errno;
+
+        return fa == fb;
+}
+
+void cmsg_close_all(struct msghdr *mh) {
+        struct cmsghdr *cmsg;
+
+        assert(mh);
+
+        CMSG_FOREACH(cmsg, mh)
+                if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS)
+                        close_many((int*) CMSG_DATA(cmsg), (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int));
+}
+
+bool fdname_is_valid(const char *s) {
+        const char *p;
+
+        /* Validates a name for $LISTEN_FDNAMES. We basically allow
+         * everything ASCII that's not a control character. Also, as
+         * special exception the ":" character is not allowed, as we
+         * use that as field separator in $LISTEN_FDNAMES.
+         *
+         * Note that the empty string is explicitly allowed
+         * here. However, we limit the length of the names to 255
+         * characters. */
+
+        if (!s)
+                return false;
+
+        for (p = s; *p; p++) {
+                if (*p < ' ')
+                        return false;
+                if (*p >= 127)
+                        return false;
+                if (*p == ':')
+                        return false;
+        }
+
+        return p - s < 256;
+}
diff --git a/src/basic/fd-util.h b/src/basic/fd-util.h
new file mode 100644 (file)
index 0000000..0e9182d
--- /dev/null
@@ -0,0 +1,75 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdio.h>
+#include <dirent.h>
+#include <stdbool.h>
+#include <sys/socket.h>
+
+#include "macro.h"
+
+/* Make sure we can distinguish fd 0 and NULL */
+#define FD_TO_PTR(fd) INT_TO_PTR((fd)+1)
+#define PTR_TO_FD(p) (PTR_TO_INT(p)-1)
+
+int close_nointr(int fd);
+int safe_close(int fd);
+void safe_close_pair(int p[]);
+
+void close_many(const int fds[], unsigned n_fd);
+
+int fclose_nointr(FILE *f);
+FILE* safe_fclose(FILE *f);
+DIR* safe_closedir(DIR *f);
+
+static inline void closep(int *fd) {
+        safe_close(*fd);
+}
+
+static inline void close_pairp(int (*p)[2]) {
+        safe_close_pair(*p);
+}
+
+static inline void fclosep(FILE **f) {
+        safe_fclose(*f);
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, pclose);
+DEFINE_TRIVIAL_CLEANUP_FUNC(DIR*, closedir);
+
+#define _cleanup_close_ _cleanup_(closep)
+#define _cleanup_fclose_ _cleanup_(fclosep)
+#define _cleanup_pclose_ _cleanup_(pclosep)
+#define _cleanup_closedir_ _cleanup_(closedirp)
+#define _cleanup_close_pair_ _cleanup_(close_pairp)
+
+int fd_nonblock(int fd, bool nonblock);
+int fd_cloexec(int fd, bool cloexec);
+
+int close_all_fds(const int except[], unsigned n_except);
+
+int same_fd(int a, int b);
+
+void cmsg_close_all(struct msghdr *mh);
+
+bool fdname_is_valid(const char *s);
diff --git a/src/basic/fs-util.c b/src/basic/fs-util.c
new file mode 100644 (file)
index 0000000..a677fc5
--- /dev/null
@@ -0,0 +1,509 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "dirent-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fs-util.h"
+#include "mkdir.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "user-util.h"
+#include "util.h"
+
+int unlink_noerrno(const char *path) {
+        PROTECT_ERRNO;
+        int r;
+
+        r = unlink(path);
+        if (r < 0)
+                return -errno;
+
+        return 0;
+}
+
+/// UNNEEDED by elogind
+#if 0
+int rmdir_parents(const char *path, const char *stop) {
+        size_t l;
+        int r = 0;
+
+        assert(path);
+        assert(stop);
+
+        l = strlen(path);
+
+        /* Skip trailing slashes */
+        while (l > 0 && path[l-1] == '/')
+                l--;
+
+        while (l > 0) {
+                char *t;
+
+                /* Skip last component */
+                while (l > 0 && path[l-1] != '/')
+                        l--;
+
+                /* Skip trailing slashes */
+                while (l > 0 && path[l-1] == '/')
+                        l--;
+
+                if (l <= 0)
+                        break;
+
+                t = strndup(path, l);
+                if (!t)
+                        return -ENOMEM;
+
+                if (path_startswith(stop, t)) {
+                        free(t);
+                        return 0;
+                }
+
+                r = rmdir(t);
+                free(t);
+
+                if (r < 0)
+                        if (errno != ENOENT)
+                                return -errno;
+        }
+
+        return 0;
+}
+
+
+int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath) {
+        struct stat buf;
+        int ret;
+
+        ret = renameat2(olddirfd, oldpath, newdirfd, newpath, RENAME_NOREPLACE);
+        if (ret >= 0)
+                return 0;
+
+        /* renameat2() exists since Linux 3.15, btrfs added support for it later.
+         * If it is not implemented, fallback to another method. */
+        if (!IN_SET(errno, EINVAL, ENOSYS))
+                return -errno;
+
+        /* The link()/unlink() fallback does not work on directories. But
+         * renameat() without RENAME_NOREPLACE gives the same semantics on
+         * directories, except when newpath is an *empty* directory. This is
+         * good enough. */
+        ret = fstatat(olddirfd, oldpath, &buf, AT_SYMLINK_NOFOLLOW);
+        if (ret >= 0 && S_ISDIR(buf.st_mode)) {
+                ret = renameat(olddirfd, oldpath, newdirfd, newpath);
+                return ret >= 0 ? 0 : -errno;
+        }
+
+        /* If it is not a directory, use the link()/unlink() fallback. */
+        ret = linkat(olddirfd, oldpath, newdirfd, newpath, 0);
+        if (ret < 0)
+                return -errno;
+
+        ret = unlinkat(olddirfd, oldpath, 0);
+        if (ret < 0) {
+                /* backup errno before the following unlinkat() alters it */
+                ret = errno;
+                (void) unlinkat(newdirfd, newpath, 0);
+                errno = ret;
+                return -errno;
+        }
+
+        return 0;
+}
+#endif // 0
+
+int readlinkat_malloc(int fd, const char *p, char **ret) {
+        size_t l = 100;
+        int r;
+
+        assert(p);
+        assert(ret);
+
+        for (;;) {
+                char *c;
+                ssize_t n;
+
+                c = new(char, l);
+                if (!c)
+                        return -ENOMEM;
+
+                n = readlinkat(fd, p, c, l-1);
+                if (n < 0) {
+                        r = -errno;
+                        free(c);
+                        return r;
+                }
+
+                if ((size_t) n < l-1) {
+                        c[n] = 0;
+                        *ret = c;
+                        return 0;
+                }
+
+                free(c);
+                l *= 2;
+        }
+}
+
+int readlink_malloc(const char *p, char **ret) {
+        return readlinkat_malloc(AT_FDCWD, p, ret);
+}
+
+/// UNNEEDED by elogind
+#if 0
+int readlink_value(const char *p, char **ret) {
+        _cleanup_free_ char *link = NULL;
+        char *value;
+        int r;
+
+        r = readlink_malloc(p, &link);
+        if (r < 0)
+                return r;
+
+        value = basename(link);
+        if (!value)
+                return -ENOENT;
+
+        value = strdup(value);
+        if (!value)
+                return -ENOMEM;
+
+        *ret = value;
+
+        return 0;
+}
+#endif // 0
+
+int readlink_and_make_absolute(const char *p, char **r) {
+        _cleanup_free_ char *target = NULL;
+        char *k;
+        int j;
+
+        assert(p);
+        assert(r);
+
+        j = readlink_malloc(p, &target);
+        if (j < 0)
+                return j;
+
+        k = file_in_same_dir(p, target);
+        if (!k)
+                return -ENOMEM;
+
+        *r = k;
+        return 0;
+}
+
+/// UNNEEDED by elogind
+#if 0
+int readlink_and_canonicalize(const char *p, char **r) {
+        char *t, *s;
+        int j;
+
+        assert(p);
+        assert(r);
+
+        j = readlink_and_make_absolute(p, &t);
+        if (j < 0)
+                return j;
+
+        s = canonicalize_file_name(t);
+        if (s) {
+                free(t);
+                *r = s;
+        } else
+                *r = t;
+
+        path_kill_slashes(*r);
+
+        return 0;
+}
+
+int readlink_and_make_absolute_root(const char *root, const char *path, char **ret) {
+        _cleanup_free_ char *target = NULL, *t = NULL;
+        const char *full;
+        int r;
+
+        full = prefix_roota(root, path);
+        r = readlink_malloc(full, &target);
+        if (r < 0)
+                return r;
+
+        t = file_in_same_dir(path, target);
+        if (!t)
+                return -ENOMEM;
+
+        *ret = t;
+        t = NULL;
+
+        return 0;
+}
+#endif // 0
+
+int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
+        assert(path);
+
+        /* Under the assumption that we are running privileged we
+         * first change the access mode and only then hand out
+         * ownership to avoid a window where access is too open. */
+
+        if (mode != MODE_INVALID)
+                if (chmod(path, mode) < 0)
+                        return -errno;
+
+        if (uid != UID_INVALID || gid != GID_INVALID)
+                if (chown(path, uid, gid) < 0)
+                        return -errno;
+
+        return 0;
+}
+
+int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) {
+        assert(fd >= 0);
+
+        /* Under the assumption that we are running privileged we
+         * first change the access mode and only then hand out
+         * ownership to avoid a window where access is too open. */
+
+        if (mode != MODE_INVALID)
+                if (fchmod(fd, mode) < 0)
+                        return -errno;
+
+        if (uid != UID_INVALID || gid != GID_INVALID)
+                if (fchown(fd, uid, gid) < 0)
+                        return -errno;
+
+        return 0;
+}
+
+int fchmod_umask(int fd, mode_t m) {
+        mode_t u;
+        int r;
+
+        u = umask(0777);
+        r = fchmod(fd, m & (~u)) < 0 ? -errno : 0;
+        umask(u);
+
+        return r;
+}
+
+int fd_warn_permissions(const char *path, int fd) {
+        struct stat st;
+
+        if (fstat(fd, &st) < 0)
+                return -errno;
+
+        if (st.st_mode & 0111)
+                log_warning("Configuration file %s is marked executable. Please remove executable permission bits. Proceeding anyway.", path);
+
+        if (st.st_mode & 0002)
+                log_warning("Configuration file %s is marked world-writable. Please remove world writability permission bits. Proceeding anyway.", path);
+
+        if (getpid() == 1 && (st.st_mode & 0044) != 0044)
+                log_warning("Configuration file %s is marked world-inaccessible. This has no effect as configuration data is accessible via APIs without restrictions. Proceeding anyway.", path);
+
+        return 0;
+}
+
+int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode) {
+        _cleanup_close_ int fd;
+        int r;
+
+        assert(path);
+
+        if (parents)
+                mkdir_parents(path, 0755);
+
+        fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, mode > 0 ? mode : 0644);
+        if (fd < 0)
+                return -errno;
+
+        if (mode != MODE_INVALID) {
+                r = fchmod(fd, mode);
+                if (r < 0)
+                        return -errno;
+        }
+
+        if (uid != UID_INVALID || gid != GID_INVALID) {
+                r = fchown(fd, uid, gid);
+                if (r < 0)
+                        return -errno;
+        }
+
+        if (stamp != USEC_INFINITY) {
+                struct timespec ts[2];
+
+                timespec_store(&ts[0], stamp);
+                ts[1] = ts[0];
+                r = futimens(fd, ts);
+        } else
+                r = futimens(fd, NULL);
+        if (r < 0)
+                return -errno;
+
+        return 0;
+}
+
+int touch(const char *path) {
+        return touch_file(path, false, USEC_INFINITY, UID_INVALID, GID_INVALID, MODE_INVALID);
+}
+
+int symlink_idempotent(const char *from, const char *to) {
+        _cleanup_free_ char *p = NULL;
+        int r;
+
+        assert(from);
+        assert(to);
+
+        if (symlink(from, to) < 0) {
+                if (errno != EEXIST)
+                        return -errno;
+
+                r = readlink_malloc(to, &p);
+                if (r < 0)
+                        return r;
+
+                if (!streq(p, from))
+                        return -EINVAL;
+        }
+
+        return 0;
+}
+
+int symlink_atomic(const char *from, const char *to) {
+        _cleanup_free_ char *t = NULL;
+        int r;
+
+        assert(from);
+        assert(to);
+
+        r = tempfn_random(to, NULL, &t);
+        if (r < 0)
+                return r;
+
+        if (symlink(from, t) < 0)
+                return -errno;
+
+        if (rename(t, to) < 0) {
+                unlink_noerrno(t);
+                return -errno;
+        }
+
+        return 0;
+}
+
+int mknod_atomic(const char *path, mode_t mode, dev_t dev) {
+        _cleanup_free_ char *t = NULL;
+        int r;
+
+        assert(path);
+
+        r = tempfn_random(path, NULL, &t);
+        if (r < 0)
+                return r;
+
+        if (mknod(t, mode, dev) < 0)
+                return -errno;
+
+        if (rename(t, path) < 0) {
+                unlink_noerrno(t);
+                return -errno;
+        }
+
+        return 0;
+}
+
+int mkfifo_atomic(const char *path, mode_t mode) {
+        _cleanup_free_ char *t = NULL;
+        int r;
+
+        assert(path);
+
+        r = tempfn_random(path, NULL, &t);
+        if (r < 0)
+                return r;
+
+        if (mkfifo(t, mode) < 0)
+                return -errno;
+
+        if (rename(t, path) < 0) {
+                unlink_noerrno(t);
+                return -errno;
+        }
+
+        return 0;
+}
+
+int get_files_in_directory(const char *path, char ***list) {
+        _cleanup_closedir_ DIR *d = NULL;
+        size_t bufsize = 0, n = 0;
+        _cleanup_strv_free_ char **l = NULL;
+
+        assert(path);
+
+        /* Returns all files in a directory in *list, and the number
+         * of files as return value. If list is NULL returns only the
+         * number. */
+
+        d = opendir(path);
+        if (!d)
+                return -errno;
+
+        for (;;) {
+                struct dirent *de;
+
+                errno = 0;
+                de = readdir(d);
+                if (!de && errno != 0)
+                        return -errno;
+                if (!de)
+                        break;
+
+                dirent_ensure_type(d, de);
+
+                if (!dirent_is_file(de))
+                        continue;
+
+                if (list) {
+                        /* one extra slot is needed for the terminating NULL */
+                        if (!GREEDY_REALLOC(l, bufsize, n + 2))
+                                return -ENOMEM;
+
+                        l[n] = strdup(de->d_name);
+                        if (!l[n])
+                                return -ENOMEM;
+
+                        l[++n] = NULL;
+                } else
+                        n++;
+        }
+
+        if (list) {
+                *list = l;
+                l = NULL; /* avoid freeing */
+        }
+
+        return n;
+}
diff --git a/src/basic/fs-util.h b/src/basic/fs-util.h
new file mode 100644 (file)
index 0000000..cc56fdf
--- /dev/null
@@ -0,0 +1,75 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <sys/inotify.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <limits.h>
+
+#include "time-util.h"
+
+int unlink_noerrno(const char *path);
+
+// UNNEEDED int rmdir_parents(const char *path, const char *stop);
+
+// UNNEEDED int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath);
+
+int readlinkat_malloc(int fd, const char *p, char **ret);
+int readlink_malloc(const char *p, char **r);
+// UNNEEDED int readlink_value(const char *p, char **ret);
+int readlink_and_make_absolute(const char *p, char **r);
+// UNNEEDED int readlink_and_canonicalize(const char *p, char **r);
+// UNNEEDED int readlink_and_make_absolute_root(const char *root, const char *path, char **ret);
+
+int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid);
+int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid);
+
+int fchmod_umask(int fd, mode_t mode);
+
+int fd_warn_permissions(const char *path, int fd);
+
+#define laccess(path, mode) faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW)
+
+int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);
+int touch(const char *path);
+
+int symlink_idempotent(const char *from, const char *to);
+
+int symlink_atomic(const char *from, const char *to);
+int mknod_atomic(const char *path, mode_t mode, dev_t dev);
+int mkfifo_atomic(const char *path, mode_t mode);
+
+int get_files_in_directory(const char *path, char ***list);
+
+#define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
+
+#define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
+        for ((e) = &buffer.ev;                                \
+             (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
+             (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
+
+union inotify_event_buffer {
+        struct inotify_event ev;
+        uint8_t raw[INOTIFY_EVENT_MAX];
+};
diff --git a/src/basic/hexdecoct.c b/src/basic/hexdecoct.c
new file mode 100644 (file)
index 0000000..4eb566b
--- /dev/null
@@ -0,0 +1,698 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <ctype.h>
+#include <inttypes.h>
+
+#include "alloc-util.h"
+#include "hexdecoct.h"
+#include "util.h"
+
+char octchar(int x) {
+        return '0' + (x & 7);
+}
+
+int unoctchar(char c) {
+
+        if (c >= '0' && c <= '7')
+                return c - '0';
+
+        return -EINVAL;
+}
+
+char decchar(int x) {
+        return '0' + (x % 10);
+}
+
+int undecchar(char c) {
+
+        if (c >= '0' && c <= '9')
+                return c - '0';
+
+        return -EINVAL;
+}
+
+char hexchar(int x) {
+        static const char table[16] = "0123456789abcdef";
+
+        return table[x & 15];
+}
+
+int unhexchar(char c) {
+
+        if (c >= '0' && c <= '9')
+                return c - '0';
+
+        if (c >= 'a' && c <= 'f')
+                return c - 'a' + 10;
+
+        if (c >= 'A' && c <= 'F')
+                return c - 'A' + 10;
+
+        return -EINVAL;
+}
+
+char *hexmem(const void *p, size_t l) {
+        char *r, *z;
+        const uint8_t *x;
+
+        z = r = malloc(l * 2 + 1);
+        if (!r)
+                return NULL;
+
+        for (x = p; x < (const uint8_t*) p + l; x++) {
+                *(z++) = hexchar(*x >> 4);
+                *(z++) = hexchar(*x & 15);
+        }
+
+        *z = 0;
+        return r;
+}
+
+int unhexmem(const char *p, size_t l, void **mem, size_t *len) {
+        _cleanup_free_ uint8_t *r = NULL;
+        uint8_t *z;
+        const char *x;
+
+        assert(mem);
+        assert(len);
+        assert(p);
+
+        z = r = malloc((l + 1) / 2 + 1);
+        if (!r)
+                return -ENOMEM;
+
+        for (x = p; x < p + l; x += 2) {
+                int a, b;
+
+                a = unhexchar(x[0]);
+                if (a < 0)
+                        return a;
+                else if (x+1 < p + l) {
+                        b = unhexchar(x[1]);
+                        if (b < 0)
+                                return b;
+                } else
+                        b = 0;
+
+                *(z++) = (uint8_t) a << 4 | (uint8_t) b;
+        }
+
+        *z = 0;
+
+        *mem = r;
+        r = NULL;
+        *len = (l + 1) / 2;
+
+        return 0;
+}
+
+/* https://tools.ietf.org/html/rfc4648#section-6
+ * Notice that base32hex differs from base32 in the alphabet it uses.
+ * The distinction is that the base32hex representation preserves the
+ * order of the underlying data when compared as bytestrings, this is
+ * useful when representing NSEC3 hashes, as one can then verify the
+ * order of hashes directly from their representation. */
+char base32hexchar(int x) {
+        static const char table[32] = "0123456789"
+                                      "ABCDEFGHIJKLMNOPQRSTUV";
+
+        return table[x & 31];
+}
+
+int unbase32hexchar(char c) {
+        unsigned offset;
+
+        if (c >= '0' && c <= '9')
+                return c - '0';
+
+        offset = '9' - '0' + 1;
+
+        if (c >= 'A' && c <= 'V')
+                return c - 'A' + offset;
+
+        return -EINVAL;
+}
+
+char *base32hexmem(const void *p, size_t l, bool padding) {
+        char *r, *z;
+        const uint8_t *x;
+        size_t len;
+
+        if (padding)
+                /* five input bytes makes eight output bytes, padding is added so we must round up */
+                len = 8 * (l + 4) / 5;
+        else {
+                /* same, but round down as there is no padding */
+                len = 8 * l / 5;
+
+                switch (l % 5) {
+                case 4:
+                        len += 7;
+                        break;
+                case 3:
+                        len += 5;
+                        break;
+                case 2:
+                        len += 4;
+                        break;
+                case 1:
+                        len += 2;
+                        break;
+                }
+        }
+
+        z = r = malloc(len + 1);
+        if (!r)
+                return NULL;
+
+        for (x = p; x < (const uint8_t*) p + (l / 5) * 5; x += 5) {
+                /* x[0] == XXXXXXXX; x[1] == YYYYYYYY; x[2] == ZZZZZZZZ
+                   x[3] == QQQQQQQQ; x[4] == WWWWWWWW */
+                *(z++) = base32hexchar(x[0] >> 3);                    /* 000XXXXX */
+                *(z++) = base32hexchar((x[0] & 7) << 2 | x[1] >> 6);  /* 000XXXYY */
+                *(z++) = base32hexchar((x[1] & 63) >> 1);             /* 000YYYYY */
+                *(z++) = base32hexchar((x[1] & 1) << 4 | x[2] >> 4);  /* 000YZZZZ */
+                *(z++) = base32hexchar((x[2] & 15) << 1 | x[3] >> 7); /* 000ZZZZQ */
+                *(z++) = base32hexchar((x[3] & 127) >> 2);            /* 000QQQQQ */
+                *(z++) = base32hexchar((x[3] & 3) << 3 | x[4] >> 5);  /* 000QQWWW */
+                *(z++) = base32hexchar((x[4] & 31));                  /* 000WWWWW */
+        }
+
+        switch (l % 5) {
+        case 4:
+                *(z++) = base32hexchar(x[0] >> 3);                    /* 000XXXXX */
+                *(z++) = base32hexchar((x[0] & 7) << 2 | x[1] >> 6);  /* 000XXXYY */
+                *(z++) = base32hexchar((x[1] & 63) >> 1);             /* 000YYYYY */
+                *(z++) = base32hexchar((x[1] & 1) << 4 | x[2] >> 4);   /* 000YZZZZ */
+                *(z++) = base32hexchar((x[2] & 15) << 1 | x[3] >> 7); /* 000ZZZZQ */
+                *(z++) = base32hexchar((x[3] & 127) >> 2);            /* 000QQQQQ */
+                *(z++) = base32hexchar((x[3] & 3) << 3);              /* 000QQ000 */
+                if (padding)
+                        *(z++) = '=';
+
+                break;
+
+        case 3:
+                *(z++) = base32hexchar(x[0] >> 3);                   /* 000XXXXX */
+                *(z++) = base32hexchar((x[0] & 7) << 2 | x[1] >> 6); /* 000XXXYY */
+                *(z++) = base32hexchar((x[1] & 63) >> 1);            /* 000YYYYY */
+                *(z++) = base32hexchar((x[1] & 1) << 4 | x[2] >> 4); /* 000YZZZZ */
+                *(z++) = base32hexchar((x[2] & 15) << 1);            /* 000ZZZZ0 */
+                if (padding) {
+                        *(z++) = '=';
+                        *(z++) = '=';
+                        *(z++) = '=';
+                }
+
+                break;
+
+        case 2:
+                *(z++) = base32hexchar(x[0] >> 3);                   /* 000XXXXX */
+                *(z++) = base32hexchar((x[0] & 7) << 2 | x[1] >> 6); /* 000XXXYY */
+                *(z++) = base32hexchar((x[1] & 63) >> 1);            /* 000YYYYY */
+                *(z++) = base32hexchar((x[1] & 1) << 4);             /* 000Y0000 */
+                if (padding) {
+                        *(z++) = '=';
+                        *(z++) = '=';
+                        *(z++) = '=';
+                        *(z++) = '=';
+                }
+
+                break;
+
+        case 1:
+                *(z++) = base32hexchar(x[0] >> 3);       /* 000XXXXX */
+                *(z++) = base32hexchar((x[0] & 7) << 2); /* 000XXX00 */
+                if (padding) {
+                        *(z++) = '=';
+                        *(z++) = '=';
+                        *(z++) = '=';
+                        *(z++) = '=';
+                        *(z++) = '=';
+                        *(z++) = '=';
+                }
+
+                break;
+        }
+
+        *z = 0;
+        return r;
+}
+
+int unbase32hexmem(const char *p, size_t l, bool padding, void **mem, size_t *_len) {
+        _cleanup_free_ uint8_t *r = NULL;
+        int a, b, c, d, e, f, g, h;
+        uint8_t *z;
+        const char *x;
+        size_t len;
+        unsigned pad = 0;
+
+        assert(p);
+
+        /* padding ensures any base32hex input has input divisible by 8 */
+        if (padding && l % 8 != 0)
+                return -EINVAL;
+
+        if (padding) {
+                /* strip the padding */
+                while (l > 0 && p[l - 1] == '=' && pad < 7) {
+                        pad ++;
+                        l --;
+                }
+        }
+
+        /* a group of eight input bytes needs five output bytes, in case of
+           padding we need to add some extra bytes */
+        len = (l / 8) * 5;
+
+        switch (l % 8) {
+        case 7:
+                len += 4;
+                break;
+        case 5:
+                len += 3;
+                break;
+        case 4:
+                len += 2;
+                break;
+        case 2:
+                len += 1;
+                break;
+        case 0:
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        z = r = malloc(len + 1);
+        if (!r)
+                return -ENOMEM;
+
+        for (x = p; x < p + (l / 8) * 8; x += 8) {
+                /* a == 000XXXXX; b == 000YYYYY; c == 000ZZZZZ; d == 000WWWWW
+                   e == 000SSSSS; f == 000QQQQQ; g == 000VVVVV; h == 000RRRRR */
+                a = unbase32hexchar(x[0]);
+                if (a < 0)
+                        return -EINVAL;
+
+                b = unbase32hexchar(x[1]);
+                if (b < 0)
+                        return -EINVAL;
+
+                c = unbase32hexchar(x[2]);
+                if (c < 0)
+                        return -EINVAL;
+
+                d = unbase32hexchar(x[3]);
+                if (d < 0)
+                        return -EINVAL;
+
+                e = unbase32hexchar(x[4]);
+                if (e < 0)
+                        return -EINVAL;
+
+                f = unbase32hexchar(x[5]);
+                if (f < 0)
+                        return -EINVAL;
+
+                g = unbase32hexchar(x[6]);
+                if (g < 0)
+                        return -EINVAL;
+
+                h = unbase32hexchar(x[7]);
+                if (h < 0)
+                        return -EINVAL;
+
+                *(z++) = (uint8_t) a << 3 | (uint8_t) b >> 2;                    /* XXXXXYYY */
+                *(z++) = (uint8_t) b << 6 | (uint8_t) c << 1 | (uint8_t) d >> 4; /* YYZZZZZW */
+                *(z++) = (uint8_t) d << 4 | (uint8_t) e >> 1;                    /* WWWWSSSS */
+                *(z++) = (uint8_t) e << 7 | (uint8_t) f << 2 | (uint8_t) g >> 3; /* SQQQQQVV */
+                *(z++) = (uint8_t) g << 5 | (uint8_t) h;                         /* VVVRRRRR */
+        }
+
+        switch (l % 8) {
+        case 7:
+                a = unbase32hexchar(x[0]);
+                if (a < 0)
+                        return -EINVAL;
+
+                b = unbase32hexchar(x[1]);
+                if (b < 0)
+                        return -EINVAL;
+
+                c = unbase32hexchar(x[2]);
+                if (c < 0)
+                        return -EINVAL;
+
+                d = unbase32hexchar(x[3]);
+                if (d < 0)
+                        return -EINVAL;
+
+                e = unbase32hexchar(x[4]);
+                if (e < 0)
+                        return -EINVAL;
+
+                f = unbase32hexchar(x[5]);
+                if (f < 0)
+                        return -EINVAL;
+
+                g = unbase32hexchar(x[6]);
+                if (g < 0)
+                        return -EINVAL;
+
+                /* g == 000VV000 */
+                if (g & 7)
+                        return -EINVAL;
+
+                *(z++) = (uint8_t) a << 3 | (uint8_t) b >> 2;                    /* XXXXXYYY */
+                *(z++) = (uint8_t) b << 6 | (uint8_t) c << 1 | (uint8_t) d >> 4; /* YYZZZZZW */
+                *(z++) = (uint8_t) d << 4 | (uint8_t) e >> 1;                    /* WWWWSSSS */
+                *(z++) = (uint8_t) e << 7 | (uint8_t) f << 2 | (uint8_t) g >> 3; /* SQQQQQVV */
+
+                break;
+        case 5:
+                a = unbase32hexchar(x[0]);
+                if (a < 0)
+                        return -EINVAL;
+
+                b = unbase32hexchar(x[1]);
+                if (b < 0)
+                        return -EINVAL;
+
+                c = unbase32hexchar(x[2]);
+                if (c < 0)
+                        return -EINVAL;
+
+                d = unbase32hexchar(x[3]);
+                if (d < 0)
+                        return -EINVAL;
+
+                e = unbase32hexchar(x[4]);
+                if (e < 0)
+                        return -EINVAL;
+
+                /* e == 000SSSS0 */
+                if (e & 1)
+                        return -EINVAL;
+
+                *(z++) = (uint8_t) a << 3 | (uint8_t) b >> 2;                    /* XXXXXYYY */
+                *(z++) = (uint8_t) b << 6 | (uint8_t) c << 1 | (uint8_t) d >> 4; /* YYZZZZZW */
+                *(z++) = (uint8_t) d << 4 | (uint8_t) e >> 1;                    /* WWWWSSSS */
+
+                break;
+        case 4:
+                a = unbase32hexchar(x[0]);
+                if (a < 0)
+                        return -EINVAL;
+
+                b = unbase32hexchar(x[1]);
+                if (b < 0)
+                        return -EINVAL;
+
+                c = unbase32hexchar(x[2]);
+                if (c < 0)
+                        return -EINVAL;
+
+                d = unbase32hexchar(x[3]);
+                if (d < 0)
+                        return -EINVAL;
+
+                /* d == 000W0000 */
+                if (d & 15)
+                        return -EINVAL;
+
+                *(z++) = (uint8_t) a << 3 | (uint8_t) b >> 2;                    /* XXXXXYYY */
+                *(z++) = (uint8_t) b << 6 | (uint8_t) c << 1 | (uint8_t) d >> 4; /* YYZZZZZW */
+
+                break;
+        case 2:
+                a = unbase32hexchar(x[0]);
+                if (a < 0)
+                        return -EINVAL;
+
+                b = unbase32hexchar(x[1]);
+                if (b < 0)
+                        return -EINVAL;
+
+                /* b == 000YYY00 */
+                if (b & 3)
+                        return -EINVAL;
+
+                *(z++) = (uint8_t) a << 3 | (uint8_t) b >> 2; /* XXXXXYYY */
+
+                break;
+        case 0:
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        *z = 0;
+
+        *mem = r;
+        r = NULL;
+        *_len = len;
+
+        return 0;
+}
+
+/* https://tools.ietf.org/html/rfc4648#section-4 */
+char base64char(int x) {
+        static const char table[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+                                      "abcdefghijklmnopqrstuvwxyz"
+                                      "0123456789+/";
+        return table[x & 63];
+}
+
+int unbase64char(char c) {
+        unsigned offset;
+
+        if (c >= 'A' && c <= 'Z')
+                return c - 'A';
+
+        offset = 'Z' - 'A' + 1;
+
+        if (c >= 'a' && c <= 'z')
+                return c - 'a' + offset;
+
+        offset += 'z' - 'a' + 1;
+
+        if (c >= '0' && c <= '9')
+                return c - '0' + offset;
+
+        offset += '9' - '0' + 1;
+
+        if (c == '+')
+                return offset;
+
+        offset ++;
+
+        if (c == '/')
+                return offset;
+
+        return -EINVAL;
+}
+
+char *base64mem(const void *p, size_t l) {
+        char *r, *z;
+        const uint8_t *x;
+
+        /* three input bytes makes four output bytes, padding is added so we must round up */
+        z = r = malloc(4 * (l + 2) / 3 + 1);
+        if (!r)
+                return NULL;
+
+        for (x = p; x < (const uint8_t*) p + (l / 3) * 3; x += 3) {
+                /* x[0] == XXXXXXXX; x[1] == YYYYYYYY; x[2] == ZZZZZZZZ */
+                *(z++) = base64char(x[0] >> 2);                    /* 00XXXXXX */
+                *(z++) = base64char((x[0] & 3) << 4 | x[1] >> 4);  /* 00XXYYYY */
+                *(z++) = base64char((x[1] & 15) << 2 | x[2] >> 6); /* 00YYYYZZ */
+                *(z++) = base64char(x[2] & 63);                    /* 00ZZZZZZ */
+        }
+
+        switch (l % 3) {
+        case 2:
+                *(z++) = base64char(x[0] >> 2);                   /* 00XXXXXX */
+                *(z++) = base64char((x[0] & 3) << 4 | x[1] >> 4); /* 00XXYYYY */
+                *(z++) = base64char((x[1] & 15) << 2);            /* 00YYYY00 */
+                *(z++) = '=';
+
+                break;
+        case 1:
+                *(z++) = base64char(x[0] >> 2);        /* 00XXXXXX */
+                *(z++) = base64char((x[0] & 3) << 4);  /* 00XX0000 */
+                *(z++) = '=';
+                *(z++) = '=';
+
+                break;
+        }
+
+        *z = 0;
+        return r;
+}
+
+int unbase64mem(const char *p, size_t l, void **mem, size_t *_len) {
+        _cleanup_free_ uint8_t *r = NULL;
+        int a, b, c, d;
+        uint8_t *z;
+        const char *x;
+        size_t len;
+
+        assert(p);
+
+        /* padding ensures any base63 input has input divisible by 4 */
+        if (l % 4 != 0)
+                return -EINVAL;
+
+        /* strip the padding */
+        if (l > 0 && p[l - 1] == '=')
+                l --;
+        if (l > 0 && p[l - 1] == '=')
+                l --;
+
+        /* a group of four input bytes needs three output bytes, in case of
+           padding we need to add two or three extra bytes */
+        len = (l / 4) * 3 + (l % 4 ? (l % 4) - 1 : 0);
+
+        z = r = malloc(len + 1);
+        if (!r)
+                return -ENOMEM;
+
+        for (x = p; x < p + (l / 4) * 4; x += 4) {
+                /* a == 00XXXXXX; b == 00YYYYYY; c == 00ZZZZZZ; d == 00WWWWWW */
+                a = unbase64char(x[0]);
+                if (a < 0)
+                        return -EINVAL;
+
+                b = unbase64char(x[1]);
+                if (b < 0)
+                        return -EINVAL;
+
+                c = unbase64char(x[2]);
+                if (c < 0)
+                        return -EINVAL;
+
+                d = unbase64char(x[3]);
+                if (d < 0)
+                        return -EINVAL;
+
+                *(z++) = (uint8_t) a << 2 | (uint8_t) b >> 4; /* XXXXXXYY */
+                *(z++) = (uint8_t) b << 4 | (uint8_t) c >> 2; /* YYYYZZZZ */
+                *(z++) = (uint8_t) c << 6 | (uint8_t) d;      /* ZZWWWWWW */
+        }
+
+        switch (l % 4) {
+        case 3:
+                a = unbase64char(x[0]);
+                if (a < 0)
+                        return -EINVAL;
+
+                b = unbase64char(x[1]);
+                if (b < 0)
+                        return -EINVAL;
+
+                c = unbase64char(x[2]);
+                if (c < 0)
+                        return -EINVAL;
+
+                /* c == 00ZZZZ00 */
+                if (c & 3)
+                        return -EINVAL;
+
+                *(z++) = (uint8_t) a << 2 | (uint8_t) b >> 4; /* XXXXXXYY */
+                *(z++) = (uint8_t) b << 4 | (uint8_t) c >> 2; /* YYYYZZZZ */
+
+                break;
+        case 2:
+                a = unbase64char(x[0]);
+                if (a < 0)
+                        return -EINVAL;
+
+                b = unbase64char(x[1]);
+                if (b < 0)
+                        return -EINVAL;
+
+                /* b == 00YY0000 */
+                if (b & 15)
+                        return -EINVAL;
+
+                *(z++) = (uint8_t) a << 2 | (uint8_t) (b >> 4); /* XXXXXXYY */
+
+                break;
+        case 0:
+
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        *z = 0;
+
+        *mem = r;
+        r = NULL;
+        *_len = len;
+
+        return 0;
+}
+
+void hexdump(FILE *f, const void *p, size_t s) {
+        const uint8_t *b = p;
+        unsigned n = 0;
+
+        assert(s == 0 || b);
+
+        while (s > 0) {
+                size_t i;
+
+                fprintf(f, "%04x  ", n);
+
+                for (i = 0; i < 16; i++) {
+
+                        if (i >= s)
+                                fputs("   ", f);
+                        else
+                                fprintf(f, "%02x ", b[i]);
+
+                        if (i == 7)
+                                fputc(' ', f);
+                }
+
+                fputc(' ', f);
+
+                for (i = 0; i < 16; i++) {
+
+                        if (i >= s)
+                                fputc(' ', f);
+                        else
+                                fputc(isprint(b[i]) ? (char) b[i] : '.', f);
+                }
+
+                fputc('\n', f);
+
+                if (s < 16)
+                        break;
+
+                n += 16;
+                b += 16;
+                s -= 16;
+        }
+}
diff --git a/src/basic/hexdecoct.h b/src/basic/hexdecoct.h
new file mode 100644 (file)
index 0000000..4aeb4c3
--- /dev/null
@@ -0,0 +1,54 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <sys/types.h>
+
+#include "macro.h"
+
+char octchar(int x) _const_;
+int unoctchar(char c) _const_;
+
+char decchar(int x) _const_;
+int undecchar(char c) _const_;
+
+char hexchar(int x) _const_;
+int unhexchar(char c) _const_;
+
+char *hexmem(const void *p, size_t l);
+int unhexmem(const char *p, size_t l, void **mem, size_t *len);
+
+char base32hexchar(int x) _const_;
+int unbase32hexchar(char c) _const_;
+
+char base64char(int x) _const_;
+int unbase64char(char c) _const_;
+
+char *base32hexmem(const void *p, size_t l, bool padding);
+int unbase32hexmem(const char *p, size_t l, bool padding, void **mem, size_t *len);
+
+char *base64mem(const void *p, size_t l);
+int unbase64mem(const char *p, size_t l, void **mem, size_t *len);
+
+void hexdump(FILE *f, const void *p, size_t s);
diff --git a/src/basic/io-util.c b/src/basic/io-util.c
new file mode 100644 (file)
index 0000000..ac8f93f
--- /dev/null
@@ -0,0 +1,261 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <poll.h>
+#include <unistd.h>
+
+#include "io-util.h"
+
+int flush_fd(int fd) {
+        struct pollfd pollfd = {
+                .fd = fd,
+                .events = POLLIN,
+        };
+
+        for (;;) {
+                char buf[LINE_MAX];
+                ssize_t l;
+                int r;
+
+                r = poll(&pollfd, 1, 0);
+                if (r < 0) {
+                        if (errno == EINTR)
+                                continue;
+
+                        return -errno;
+
+                } else if (r == 0)
+                        return 0;
+
+                l = read(fd, buf, sizeof(buf));
+                if (l < 0) {
+
+                        if (errno == EINTR)
+                                continue;
+
+                        if (errno == EAGAIN)
+                                return 0;
+
+                        return -errno;
+                } else if (l == 0)
+                        return 0;
+        }
+}
+
+ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) {
+        uint8_t *p = buf;
+        ssize_t n = 0;
+
+        assert(fd >= 0);
+        assert(buf);
+
+        /* If called with nbytes == 0, let's call read() at least
+         * once, to validate the operation */
+
+        if (nbytes > (size_t) SSIZE_MAX)
+                return -EINVAL;
+
+        do {
+                ssize_t k;
+
+                k = read(fd, p, nbytes);
+                if (k < 0) {
+                        if (errno == EINTR)
+                                continue;
+
+                        if (errno == EAGAIN && do_poll) {
+
+                                /* We knowingly ignore any return value here,
+                                 * and expect that any error/EOF is reported
+                                 * via read() */
+
+                                (void) fd_wait_for_event(fd, POLLIN, USEC_INFINITY);
+                                continue;
+                        }
+
+                        return n > 0 ? n : -errno;
+                }
+
+                if (k == 0)
+                        return n;
+
+                assert((size_t) k <= nbytes);
+
+                p += k;
+                nbytes -= k;
+                n += k;
+        } while (nbytes > 0);
+
+        return n;
+}
+
+int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll) {
+        ssize_t n;
+
+        n = loop_read(fd, buf, nbytes, do_poll);
+        if (n < 0)
+                return (int) n;
+        if ((size_t) n != nbytes)
+                return -EIO;
+
+        return 0;
+}
+
+int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
+        const uint8_t *p = buf;
+
+        assert(fd >= 0);
+        assert(buf);
+
+        if (nbytes > (size_t) SSIZE_MAX)
+                return -EINVAL;
+
+        do {
+                ssize_t k;
+
+                k = write(fd, p, nbytes);
+                if (k < 0) {
+                        if (errno == EINTR)
+                                continue;
+
+                        if (errno == EAGAIN && do_poll) {
+                                /* We knowingly ignore any return value here,
+                                 * and expect that any error/EOF is reported
+                                 * via write() */
+
+                                (void) fd_wait_for_event(fd, POLLOUT, USEC_INFINITY);
+                                continue;
+                        }
+
+                        return -errno;
+                }
+
+                if (_unlikely_(nbytes > 0 && k == 0)) /* Can't really happen */
+                        return -EIO;
+
+                assert((size_t) k <= nbytes);
+
+                p += k;
+                nbytes -= k;
+        } while (nbytes > 0);
+
+        return 0;
+}
+
+int pipe_eof(int fd) {
+        struct pollfd pollfd = {
+                .fd = fd,
+                .events = POLLIN|POLLHUP,
+        };
+
+        int r;
+
+        r = poll(&pollfd, 1, 0);
+        if (r < 0)
+                return -errno;
+
+        if (r == 0)
+                return 0;
+
+        return pollfd.revents & POLLHUP;
+}
+
+int fd_wait_for_event(int fd, int event, usec_t t) {
+
+        struct pollfd pollfd = {
+                .fd = fd,
+                .events = event,
+        };
+
+        struct timespec ts;
+        int r;
+
+        r = ppoll(&pollfd, 1, t == USEC_INFINITY ? NULL : timespec_store(&ts, t), NULL);
+        if (r < 0)
+                return -errno;
+
+        if (r == 0)
+                return 0;
+
+        return pollfd.revents;
+}
+
+static size_t nul_length(const uint8_t *p, size_t sz) {
+        size_t n = 0;
+
+        while (sz > 0) {
+                if (*p != 0)
+                        break;
+
+                n++;
+                p++;
+                sz--;
+        }
+
+        return n;
+}
+
+ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length) {
+        const uint8_t *q, *w, *e;
+        ssize_t l;
+
+        q = w = p;
+        e = q + sz;
+        while (q < e) {
+                size_t n;
+
+                n = nul_length(q, e - q);
+
+                /* If there are more than the specified run length of
+                 * NUL bytes, or if this is the beginning or the end
+                 * of the buffer, then seek instead of write */
+                if ((n > run_length) ||
+                    (n > 0 && q == p) ||
+                    (n > 0 && q + n >= e)) {
+                        if (q > w) {
+                                l = write(fd, w, q - w);
+                                if (l < 0)
+                                        return -errno;
+                                if (l != q -w)
+                                        return -EIO;
+                        }
+
+                        if (lseek(fd, n, SEEK_CUR) == (off_t) -1)
+                                return -errno;
+
+                        q += n;
+                        w = q;
+                } else if (n > 0)
+                        q += n;
+                else
+                        q ++;
+        }
+
+        if (q > w) {
+                l = write(fd, w, q - w);
+                if (l < 0)
+                        return -errno;
+                if (l != q - w)
+                        return -EIO;
+        }
+
+        return q - (const uint8_t*) p;
+}
diff --git a/src/basic/io-util.h b/src/basic/io-util.h
new file mode 100644 (file)
index 0000000..cd2aa75
--- /dev/null
@@ -0,0 +1,76 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+
+#include "time-util.h"
+
+int flush_fd(int fd);
+
+ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll);
+int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll);
+int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll);
+
+int pipe_eof(int fd);
+
+int fd_wait_for_event(int fd, int event, usec_t timeout);
+
+ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length);
+
+#define IOVEC_SET_STRING(i, s)                  \
+        do {                                    \
+                struct iovec *_i = &(i);        \
+                char *_s = (char *)(s);         \
+                _i->iov_base = _s;              \
+                _i->iov_len = strlen(_s);       \
+        } while(false)
+
+static inline size_t IOVEC_TOTAL_SIZE(const struct iovec *i, unsigned n) {
+        unsigned j;
+        size_t r = 0;
+
+        for (j = 0; j < n; j++)
+                r += i[j].iov_len;
+
+        return r;
+}
+
+static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
+        unsigned j;
+
+        for (j = 0; j < n; j++) {
+                size_t sub;
+
+                if (_unlikely_(k <= 0))
+                        break;
+
+                sub = MIN(i[j].iov_len, k);
+                i[j].iov_len -= sub;
+                i[j].iov_base = (uint8_t*) i[j].iov_base + sub;
+                k -= sub;
+        }
+
+        return k;
+}
diff --git a/src/basic/locale-util.c b/src/basic/locale-util.c
new file mode 100644 (file)
index 0000000..b87fd76
--- /dev/null
@@ -0,0 +1,312 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <langinfo.h>
+#include <locale.h>
+#include <sys/mman.h>
+
+#include "dirent-util.h"
+#include "fd-util.h"
+#include "locale-util.h"
+#include "path-util.h"
+#include "set.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
+#include "utf8.h"
+#include "util.h"
+
+static int add_locales_from_archive(Set *locales) {
+        /* Stolen from glibc... */
+
+        struct locarhead {
+                uint32_t magic;
+                /* Serial number.  */
+                uint32_t serial;
+                /* Name hash table.  */
+                uint32_t namehash_offset;
+                uint32_t namehash_used;
+                uint32_t namehash_size;
+                /* String table.  */
+                uint32_t string_offset;
+                uint32_t string_used;
+                uint32_t string_size;
+                /* Table with locale records.  */
+                uint32_t locrectab_offset;
+                uint32_t locrectab_used;
+                uint32_t locrectab_size;
+                /* MD5 sum hash table.  */
+                uint32_t sumhash_offset;
+                uint32_t sumhash_used;
+                uint32_t sumhash_size;
+        };
+
+        struct namehashent {
+                /* Hash value of the name.  */
+                uint32_t hashval;
+                /* Offset of the name in the string table.  */
+                uint32_t name_offset;
+                /* Offset of the locale record.  */
+                uint32_t locrec_offset;
+        };
+
+        const struct locarhead *h;
+        const struct namehashent *e;
+        const void *p = MAP_FAILED;
+        _cleanup_close_ int fd = -1;
+        size_t sz = 0;
+        struct stat st;
+        unsigned i;
+        int r;
+
+        fd = open("/usr/lib/locale/locale-archive", O_RDONLY|O_NOCTTY|O_CLOEXEC);
+        if (fd < 0)
+                return errno == ENOENT ? 0 : -errno;
+
+        if (fstat(fd, &st) < 0)
+                return -errno;
+
+        if (!S_ISREG(st.st_mode))
+                return -EBADMSG;
+
+        if (st.st_size < (off_t) sizeof(struct locarhead))
+                return -EBADMSG;
+
+        p = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+        if (p == MAP_FAILED)
+                return -errno;
+
+        h = (const struct locarhead *) p;
+        if (h->magic != 0xde020109 ||
+            h->namehash_offset + h->namehash_size > st.st_size ||
+            h->string_offset + h->string_size > st.st_size ||
+            h->locrectab_offset + h->locrectab_size > st.st_size ||
+            h->sumhash_offset + h->sumhash_size > st.st_size) {
+                r = -EBADMSG;
+                goto finish;
+        }
+
+        e = (const struct namehashent*) ((const uint8_t*) p + h->namehash_offset);
+        for (i = 0; i < h->namehash_size; i++) {
+                char *z;
+
+                if (e[i].locrec_offset == 0)
+                        continue;
+
+                if (!utf8_is_valid((char*) p + e[i].name_offset))
+                        continue;
+
+                z = strdup((char*) p + e[i].name_offset);
+                if (!z) {
+                        r = -ENOMEM;
+                        goto finish;
+                }
+
+                r = set_consume(locales, z);
+                if (r < 0)
+                        goto finish;
+        }
+
+        r = 0;
+
+ finish:
+        if (p != MAP_FAILED)
+                munmap((void*) p, sz);
+
+        return r;
+}
+
+static int add_locales_from_libdir (Set *locales) {
+        _cleanup_closedir_ DIR *dir = NULL;
+        struct dirent *entry;
+        int r;
+
+        dir = opendir("/usr/lib/locale");
+        if (!dir)
+                return errno == ENOENT ? 0 : -errno;
+
+        FOREACH_DIRENT(entry, dir, return -errno) {
+                char *z;
+
+                if (entry->d_type != DT_DIR)
+                        continue;
+
+                z = strdup(entry->d_name);
+                if (!z)
+                        return -ENOMEM;
+
+                r = set_consume(locales, z);
+                if (r < 0 && r != -EEXIST)
+                        return r;
+        }
+
+        return 0;
+}
+
+int get_locales(char ***ret) {
+        _cleanup_set_free_ Set *locales = NULL;
+        _cleanup_strv_free_ char **l = NULL;
+        int r;
+
+        locales = set_new(&string_hash_ops);
+        if (!locales)
+                return -ENOMEM;
+
+        r = add_locales_from_archive(locales);
+        if (r < 0 && r != -ENOENT)
+                return r;
+
+        r = add_locales_from_libdir(locales);
+        if (r < 0)
+                return r;
+
+        l = set_get_strv(locales);
+        if (!l)
+                return -ENOMEM;
+
+        strv_sort(l);
+
+        *ret = l;
+        l = NULL;
+
+        return 0;
+}
+
+bool locale_is_valid(const char *name) {
+
+        if (isempty(name))
+                return false;
+
+        if (strlen(name) >= 128)
+                return false;
+
+        if (!utf8_is_valid(name))
+                return false;
+
+        if (!filename_is_valid(name))
+                return false;
+
+        if (!string_is_safe(name))
+                return false;
+
+        return true;
+}
+
+void init_gettext(void) {
+        setlocale(LC_ALL, "");
+        textdomain(GETTEXT_PACKAGE);
+}
+
+bool is_locale_utf8(void) {
+        const char *set;
+        static int cached_answer = -1;
+
+        /* Note that we default to 'true' here, since today UTF8 is
+         * pretty much supported everywhere. */
+
+        if (cached_answer >= 0)
+                goto out;
+
+        if (!setlocale(LC_ALL, "")) {
+                cached_answer = true;
+                goto out;
+        }
+
+        set = nl_langinfo(CODESET);
+        if (!set) {
+                cached_answer = true;
+                goto out;
+        }
+
+        if (streq(set, "UTF-8")) {
+                cached_answer = true;
+                goto out;
+        }
+
+        /* For LC_CTYPE=="C" return true, because CTYPE is effectly
+         * unset and everything can do to UTF-8 nowadays. */
+        set = setlocale(LC_CTYPE, NULL);
+        if (!set) {
+                cached_answer = true;
+                goto out;
+        }
+
+        /* Check result, but ignore the result if C was set
+         * explicitly. */
+        cached_answer =
+                STR_IN_SET(set, "C", "POSIX") &&
+                !getenv("LC_ALL") &&
+                !getenv("LC_CTYPE") &&
+                !getenv("LANG");
+
+out:
+        return (bool) cached_answer;
+}
+
+
+const char *draw_special_char(DrawSpecialChar ch) {
+
+        static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = {
+
+                /* UTF-8 */ {
+                        [DRAW_TREE_VERTICAL]      = "\342\224\202 ",            /* │  */
+                        [DRAW_TREE_BRANCH]        = "\342\224\234\342\224\200", /* ├─ */
+                        [DRAW_TREE_RIGHT]         = "\342\224\224\342\224\200", /* └─ */
+                        [DRAW_TREE_SPACE]         = "  ",                       /*    */
+                        [DRAW_TRIANGULAR_BULLET]  = "\342\200\243",             /* ‣ */
+                        [DRAW_BLACK_CIRCLE]       = "\342\227\217",             /* ● */
+                        [DRAW_ARROW]              = "\342\206\222",             /* → */
+                        [DRAW_DASH]               = "\342\200\223",             /* – */
+                },
+
+                /* ASCII fallback */ {
+                        [DRAW_TREE_VERTICAL]      = "| ",
+                        [DRAW_TREE_BRANCH]        = "|-",
+                        [DRAW_TREE_RIGHT]         = "`-",
+                        [DRAW_TREE_SPACE]         = "  ",
+                        [DRAW_TRIANGULAR_BULLET]  = ">",
+                        [DRAW_BLACK_CIRCLE]       = "*",
+                        [DRAW_ARROW]              = "->",
+                        [DRAW_DASH]               = "-",
+                }
+        };
+
+        return draw_table[!is_locale_utf8()][ch];
+}
+
+static const char * const locale_variable_table[_VARIABLE_LC_MAX] = {
+        [VARIABLE_LANG] = "LANG",
+        [VARIABLE_LANGUAGE] = "LANGUAGE",
+        [VARIABLE_LC_CTYPE] = "LC_CTYPE",
+        [VARIABLE_LC_NUMERIC] = "LC_NUMERIC",
+        [VARIABLE_LC_TIME] = "LC_TIME",
+        [VARIABLE_LC_COLLATE] = "LC_COLLATE",
+        [VARIABLE_LC_MONETARY] = "LC_MONETARY",
+        [VARIABLE_LC_MESSAGES] = "LC_MESSAGES",
+        [VARIABLE_LC_PAPER] = "LC_PAPER",
+        [VARIABLE_LC_NAME] = "LC_NAME",
+        [VARIABLE_LC_ADDRESS] = "LC_ADDRESS",
+        [VARIABLE_LC_TELEPHONE] = "LC_TELEPHONE",
+        [VARIABLE_LC_MEASUREMENT] = "LC_MEASUREMENT",
+        [VARIABLE_LC_IDENTIFICATION] = "LC_IDENTIFICATION"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(locale_variable, LocaleVariable);
diff --git a/src/basic/locale-util.h b/src/basic/locale-util.h
new file mode 100644 (file)
index 0000000..c71d145
--- /dev/null
@@ -0,0 +1,75 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <libintl.h>
+#include <stdbool.h>
+
+#include "macro.h"
+
+typedef enum LocaleVariable {
+        /* We don't list LC_ALL here on purpose. People should be
+         * using LANG instead. */
+
+        VARIABLE_LANG,
+        VARIABLE_LANGUAGE,
+        VARIABLE_LC_CTYPE,
+        VARIABLE_LC_NUMERIC,
+        VARIABLE_LC_TIME,
+        VARIABLE_LC_COLLATE,
+        VARIABLE_LC_MONETARY,
+        VARIABLE_LC_MESSAGES,
+        VARIABLE_LC_PAPER,
+        VARIABLE_LC_NAME,
+        VARIABLE_LC_ADDRESS,
+        VARIABLE_LC_TELEPHONE,
+        VARIABLE_LC_MEASUREMENT,
+        VARIABLE_LC_IDENTIFICATION,
+        _VARIABLE_LC_MAX,
+        _VARIABLE_LC_INVALID = -1
+} LocaleVariable;
+
+int get_locales(char ***l);
+bool locale_is_valid(const char *name);
+
+#define _(String) gettext(String)
+#define N_(String) String
+void init_gettext(void);
+
+bool is_locale_utf8(void);
+
+typedef enum DrawSpecialChar {
+        DRAW_TREE_VERTICAL,
+        DRAW_TREE_BRANCH,
+        DRAW_TREE_RIGHT,
+        DRAW_TREE_SPACE,
+        DRAW_TRIANGULAR_BULLET,
+        DRAW_BLACK_CIRCLE,
+        DRAW_ARROW,
+        DRAW_DASH,
+        _DRAW_SPECIAL_CHAR_MAX
+} DrawSpecialChar;
+
+const char *draw_special_char(DrawSpecialChar ch);
+
+const char* locale_variable_to_string(LocaleVariable i) _const_;
+LocaleVariable locale_variable_from_string(const char *s) _pure_;
diff --git a/src/basic/mount-util.c b/src/basic/mount-util.c
new file mode 100644 (file)
index 0000000..ff5893d
--- /dev/null
@@ -0,0 +1,532 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <string.h>
+#include <sys/mount.h>
+#include <sys/statvfs.h>
+
+#include "alloc-util.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "mount-util.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "set.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "util.h"
+
+static int fd_fdinfo_mnt_id(int fd, const char *filename, int flags, int *mnt_id) {
+        char path[strlen("/proc/self/fdinfo/") + DECIMAL_STR_MAX(int)];
+        _cleanup_free_ char *fdinfo = NULL;
+        _cleanup_close_ int subfd = -1;
+        char *p;
+        int r;
+
+        if ((flags & AT_EMPTY_PATH) && isempty(filename))
+                xsprintf(path, "/proc/self/fdinfo/%i", fd);
+        else {
+                subfd = openat(fd, filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_PATH);
+                if (subfd < 0)
+                        return -errno;
+
+                xsprintf(path, "/proc/self/fdinfo/%i", subfd);
+        }
+
+        r = read_full_file(path, &fdinfo, NULL);
+        if (r == -ENOENT) /* The fdinfo directory is a relatively new addition */
+                return -EOPNOTSUPP;
+        if (r < 0)
+                return -errno;
+
+        p = startswith(fdinfo, "mnt_id:");
+        if (!p) {
+                p = strstr(fdinfo, "\nmnt_id:");
+                if (!p) /* The mnt_id field is a relatively new addition */
+                        return -EOPNOTSUPP;
+
+                p += 8;
+        }
+
+        p += strspn(p, WHITESPACE);
+        p[strcspn(p, WHITESPACE)] = 0;
+
+        return safe_atoi(p, mnt_id);
+}
+
+
+int fd_is_mount_point(int fd, const char *filename, int flags) {
+        union file_handle_union h = FILE_HANDLE_INIT, h_parent = FILE_HANDLE_INIT;
+        int mount_id = -1, mount_id_parent = -1;
+        bool nosupp = false, check_st_dev = true;
+        struct stat a, b;
+        int r;
+
+        assert(fd >= 0);
+        assert(filename);
+
+        /* First we will try the name_to_handle_at() syscall, which
+         * tells us the mount id and an opaque file "handle". It is
+         * not supported everywhere though (kernel compile-time
+         * option, not all file systems are hooked up). If it works
+         * the mount id is usually good enough to tell us whether
+         * something is a mount point.
+         *
+         * If that didn't work we will try to read the mount id from
+         * /proc/self/fdinfo/<fd>. This is almost as good as
+         * name_to_handle_at(), however, does not return the
+         * opaque file handle. The opaque file handle is pretty useful
+         * to detect the root directory, which we should always
+         * consider a mount point. Hence we use this only as
+         * fallback. Exporting the mnt_id in fdinfo is a pretty recent
+         * kernel addition.
+         *
+         * As last fallback we do traditional fstat() based st_dev
+         * comparisons. This is how things were traditionally done,
+         * but unionfs breaks breaks this since it exposes file
+         * systems with a variety of st_dev reported. Also, btrfs
+         * subvolumes have different st_dev, even though they aren't
+         * real mounts of their own. */
+
+        r = name_to_handle_at(fd, filename, &h.handle, &mount_id, flags);
+        if (r < 0) {
+                if (errno == ENOSYS)
+                        /* This kernel does not support name_to_handle_at()
+                         * fall back to simpler logic. */
+                        goto fallback_fdinfo;
+                else if (errno == EOPNOTSUPP)
+                        /* This kernel or file system does not support
+                         * name_to_handle_at(), hence let's see if the
+                         * upper fs supports it (in which case it is a
+                         * mount point), otherwise fallback to the
+                         * traditional stat() logic */
+                        nosupp = true;
+                else
+                        return -errno;
+        }
+
+        r = name_to_handle_at(fd, "", &h_parent.handle, &mount_id_parent, AT_EMPTY_PATH);
+        if (r < 0) {
+                if (errno == EOPNOTSUPP) {
+                        if (nosupp)
+                                /* Neither parent nor child do name_to_handle_at()?
+                                   We have no choice but to fall back. */
+                                goto fallback_fdinfo;
+                        else
+                                /* The parent can't do name_to_handle_at() but the
+                                 * directory we are interested in can?
+                                 * If so, it must be a mount point. */
+                                return 1;
+                } else
+                        return -errno;
+        }
+
+        /* The parent can do name_to_handle_at() but the
+         * directory we are interested in can't? If so, it
+         * must be a mount point. */
+        if (nosupp)
+                return 1;
+
+        /* If the file handle for the directory we are
+         * interested in and its parent are identical, we
+         * assume this is the root directory, which is a mount
+         * point. */
+
+        if (h.handle.handle_bytes == h_parent.handle.handle_bytes &&
+            h.handle.handle_type == h_parent.handle.handle_type &&
+            memcmp(h.handle.f_handle, h_parent.handle.f_handle, h.handle.handle_bytes) == 0)
+                return 1;
+
+        return mount_id != mount_id_parent;
+
+fallback_fdinfo:
+        r = fd_fdinfo_mnt_id(fd, filename, flags, &mount_id);
+        if (r == -EOPNOTSUPP)
+                goto fallback_fstat;
+        if (r < 0)
+                return r;
+
+        r = fd_fdinfo_mnt_id(fd, "", AT_EMPTY_PATH, &mount_id_parent);
+        if (r < 0)
+                return r;
+
+        if (mount_id != mount_id_parent)
+                return 1;
+
+        /* Hmm, so, the mount ids are the same. This leaves one
+         * special case though for the root file system. For that,
+         * let's see if the parent directory has the same inode as we
+         * are interested in. Hence, let's also do fstat() checks now,
+         * too, but avoid the st_dev comparisons, since they aren't
+         * that useful on unionfs mounts. */
+        check_st_dev = false;
+
+fallback_fstat:
+        /* yay for fstatat() taking a different set of flags than the other
+         * _at() above */
+        if (flags & AT_SYMLINK_FOLLOW)
+                flags &= ~AT_SYMLINK_FOLLOW;
+        else
+                flags |= AT_SYMLINK_NOFOLLOW;
+        if (fstatat(fd, filename, &a, flags) < 0)
+                return -errno;
+
+        if (fstatat(fd, "", &b, AT_EMPTY_PATH) < 0)
+                return -errno;
+
+        /* A directory with same device and inode as its parent? Must
+         * be the root directory */
+        if (a.st_dev == b.st_dev &&
+            a.st_ino == b.st_ino)
+                return 1;
+
+        return check_st_dev && (a.st_dev != b.st_dev);
+}
+
+/* flags can be AT_SYMLINK_FOLLOW or 0 */
+int path_is_mount_point(const char *t, int flags) {
+        _cleanup_close_ int fd = -1;
+        _cleanup_free_ char *canonical = NULL, *parent = NULL;
+
+        assert(t);
+
+        if (path_equal(t, "/"))
+                return 1;
+
+        /* we need to resolve symlinks manually, we can't just rely on
+         * fd_is_mount_point() to do that for us; if we have a structure like
+         * /bin -> /usr/bin/ and /usr is a mount point, then the parent that we
+         * look at needs to be /usr, not /. */
+        if (flags & AT_SYMLINK_FOLLOW) {
+                canonical = canonicalize_file_name(t);
+                if (!canonical)
+                        return -errno;
+
+                t = canonical;
+        }
+
+        parent = dirname_malloc(t);
+        if (!parent)
+                return -ENOMEM;
+
+        fd = openat(AT_FDCWD, parent, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_PATH);
+        if (fd < 0)
+                return -errno;
+
+        return fd_is_mount_point(fd, basename(t), flags);
+}
+
+/// UNNEEDED by elogind
+#if 0
+int umount_recursive(const char *prefix, int flags) {
+        bool again;
+        int n = 0, r;
+
+        /* Try to umount everything recursively below a
+         * directory. Also, take care of stacked mounts, and keep
+         * unmounting them until they are gone. */
+
+        do {
+                _cleanup_fclose_ FILE *proc_self_mountinfo = NULL;
+
+                again = false;
+                r = 0;
+
+                proc_self_mountinfo = fopen("/proc/self/mountinfo", "re");
+                if (!proc_self_mountinfo)
+                        return -errno;
+
+                for (;;) {
+                        _cleanup_free_ char *path = NULL, *p = NULL;
+                        int k;
+
+                        k = fscanf(proc_self_mountinfo,
+                                   "%*s "       /* (1) mount id */
+                                   "%*s "       /* (2) parent id */
+                                   "%*s "       /* (3) major:minor */
+                                   "%*s "       /* (4) root */
+                                   "%ms "       /* (5) mount point */
+                                   "%*s"        /* (6) mount options */
+                                   "%*[^-]"     /* (7) optional fields */
+                                   "- "         /* (8) separator */
+                                   "%*s "       /* (9) file system type */
+                                   "%*s"        /* (10) mount source */
+                                   "%*s"        /* (11) mount options 2 */
+                                   "%*[^\n]",   /* some rubbish at the end */
+                                   &path);
+                        if (k != 1) {
+                                if (k == EOF)
+                                        break;
+
+                                continue;
+                        }
+
+                        r = cunescape(path, UNESCAPE_RELAX, &p);
+                        if (r < 0)
+                                return r;
+
+                        if (!path_startswith(p, prefix))
+                                continue;
+
+                        if (umount2(p, flags) < 0) {
+                                r = -errno;
+                                continue;
+                        }
+
+                        again = true;
+                        n++;
+
+                        break;
+                }
+
+        } while (again);
+
+        return r ? r : n;
+}
+
+static int get_mount_flags(const char *path, unsigned long *flags) {
+        struct statvfs buf;
+
+        if (statvfs(path, &buf) < 0)
+                return -errno;
+        *flags = buf.f_flag;
+        return 0;
+}
+
+int bind_remount_recursive(const char *prefix, bool ro) {
+        _cleanup_set_free_free_ Set *done = NULL;
+        _cleanup_free_ char *cleaned = NULL;
+        int r;
+
+        /* Recursively remount a directory (and all its submounts)
+         * read-only or read-write. If the directory is already
+         * mounted, we reuse the mount and simply mark it
+         * MS_BIND|MS_RDONLY (or remove the MS_RDONLY for read-write
+         * operation). If it isn't we first make it one. Afterwards we
+         * apply MS_BIND|MS_RDONLY (or remove MS_RDONLY) to all
+         * submounts we can access, too. When mounts are stacked on
+         * the same mount point we only care for each individual
+         * "top-level" mount on each point, as we cannot
+         * influence/access the underlying mounts anyway. We do not
+         * have any effect on future submounts that might get
+         * propagated, they migt be writable. This includes future
+         * submounts that have been triggered via autofs. */
+
+        cleaned = strdup(prefix);
+        if (!cleaned)
+                return -ENOMEM;
+
+        path_kill_slashes(cleaned);
+
+        done = set_new(&string_hash_ops);
+        if (!done)
+                return -ENOMEM;
+
+        for (;;) {
+                _cleanup_fclose_ FILE *proc_self_mountinfo = NULL;
+                _cleanup_set_free_free_ Set *todo = NULL;
+                bool top_autofs = false;
+                char *x;
+                unsigned long orig_flags;
+
+                todo = set_new(&string_hash_ops);
+                if (!todo)
+                        return -ENOMEM;
+
+                proc_self_mountinfo = fopen("/proc/self/mountinfo", "re");
+                if (!proc_self_mountinfo)
+                        return -errno;
+
+                for (;;) {
+                        _cleanup_free_ char *path = NULL, *p = NULL, *type = NULL;
+                        int k;
+
+                        k = fscanf(proc_self_mountinfo,
+                                   "%*s "       /* (1) mount id */
+                                   "%*s "       /* (2) parent id */
+                                   "%*s "       /* (3) major:minor */
+                                   "%*s "       /* (4) root */
+                                   "%ms "       /* (5) mount point */
+                                   "%*s"        /* (6) mount options (superblock) */
+                                   "%*[^-]"     /* (7) optional fields */
+                                   "- "         /* (8) separator */
+                                   "%ms "       /* (9) file system type */
+                                   "%*s"        /* (10) mount source */
+                                   "%*s"        /* (11) mount options (bind mount) */
+                                   "%*[^\n]",   /* some rubbish at the end */
+                                   &path,
+                                   &type);
+                        if (k != 2) {
+                                if (k == EOF)
+                                        break;
+
+                                continue;
+                        }
+
+                        r = cunescape(path, UNESCAPE_RELAX, &p);
+                        if (r < 0)
+                                return r;
+
+                        /* Let's ignore autofs mounts.  If they aren't
+                         * triggered yet, we want to avoid triggering
+                         * them, as we don't make any guarantees for
+                         * future submounts anyway.  If they are
+                         * already triggered, then we will find
+                         * another entry for this. */
+                        if (streq(type, "autofs")) {
+                                top_autofs = top_autofs || path_equal(cleaned, p);
+                                continue;
+                        }
+
+                        if (path_startswith(p, cleaned) &&
+                            !set_contains(done, p)) {
+
+                                r = set_consume(todo, p);
+                                p = NULL;
+
+                                if (r == -EEXIST)
+                                        continue;
+                                if (r < 0)
+                                        return r;
+                        }
+                }
+
+                /* If we have no submounts to process anymore and if
+                 * the root is either already done, or an autofs, we
+                 * are done */
+                if (set_isempty(todo) &&
+                    (top_autofs || set_contains(done, cleaned)))
+                        return 0;
+
+                if (!set_contains(done, cleaned) &&
+                    !set_contains(todo, cleaned)) {
+                        /* The prefix directory itself is not yet a
+                         * mount, make it one. */
+                        if (mount(cleaned, cleaned, NULL, MS_BIND|MS_REC, NULL) < 0)
+                                return -errno;
+
+                        orig_flags = 0;
+                        (void) get_mount_flags(cleaned, &orig_flags);
+                        orig_flags &= ~MS_RDONLY;
+
+                        if (mount(NULL, prefix, NULL, orig_flags|MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0)
+                                return -errno;
+
+                        x = strdup(cleaned);
+                        if (!x)
+                                return -ENOMEM;
+
+                        r = set_consume(done, x);
+                        if (r < 0)
+                                return r;
+                }
+
+                while ((x = set_steal_first(todo))) {
+
+                        r = set_consume(done, x);
+                        if (r == -EEXIST || r == 0)
+                                continue;
+                        if (r < 0)
+                                return r;
+
+                        /* Try to reuse the original flag set, but
+                         * don't care for errors, in case of
+                         * obstructed mounts */
+                        orig_flags = 0;
+                        (void) get_mount_flags(x, &orig_flags);
+                        orig_flags &= ~MS_RDONLY;
+
+                        if (mount(NULL, x, NULL, orig_flags|MS_BIND|MS_REMOUNT|(ro ? MS_RDONLY : 0), NULL) < 0) {
+
+                                /* Deal with mount points that are
+                                 * obstructed by a later mount */
+
+                                if (errno != ENOENT)
+                                        return -errno;
+                        }
+
+                }
+        }
+}
+
+int mount_move_root(const char *path) {
+        assert(path);
+
+        if (chdir(path) < 0)
+                return -errno;
+
+        if (mount(path, "/", NULL, MS_MOVE, NULL) < 0)
+                return -errno;
+
+        if (chroot(".") < 0)
+                return -errno;
+
+        if (chdir("/") < 0)
+                return -errno;
+
+        return 0;
+}
+
+bool fstype_is_network(const char *fstype) {
+        static const char table[] =
+                "afs\0"
+                "cifs\0"
+                "smbfs\0"
+                "sshfs\0"
+                "ncpfs\0"
+                "ncp\0"
+                "nfs\0"
+                "nfs4\0"
+                "gfs\0"
+                "gfs2\0"
+                "glusterfs\0";
+
+        const char *x;
+
+        x = startswith(fstype, "fuse.");
+        if (x)
+                fstype = x;
+
+        return nulstr_contains(table, fstype);
+}
+
+int repeat_unmount(const char *path, int flags) {
+        bool done = false;
+
+        assert(path);
+
+        /* If there are multiple mounts on a mount point, this
+         * removes them all */
+
+        for (;;) {
+                if (umount2(path, flags) < 0) {
+
+                        if (errno == EINVAL)
+                                return done;
+
+                        return -errno;
+                }
+
+                done = true;
+        }
+}
+#endif // 0
diff --git a/src/basic/mount-util.h b/src/basic/mount-util.h
new file mode 100644 (file)
index 0000000..9b36bc1
--- /dev/null
@@ -0,0 +1,52 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <mntent.h>
+#include <stdbool.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "missing.h"
+
+int fd_is_mount_point(int fd, const char *filename, int flags);
+int path_is_mount_point(const char *path, int flags);
+
+// UNNEEDED int repeat_unmount(const char *path, int flags);
+
+// UNNEEDED int umount_recursive(const char *target, int flags);
+// UNNEEDED int bind_remount_recursive(const char *prefix, bool ro);
+
+// UNNEEDED int mount_move_root(const char *path);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(FILE*, endmntent);
+#define _cleanup_endmntent_ _cleanup_(endmntentp)
+
+// UNNEEDED bool fstype_is_network(const char *fstype);
+
+union file_handle_union {
+        struct file_handle handle;
+        char padding[sizeof(struct file_handle) + MAX_HANDLE_SZ];
+};
+
+#define FILE_HANDLE_INIT { .handle.handle_bytes = MAX_HANDLE_SZ }
diff --git a/src/basic/parse-util.c b/src/basic/parse-util.c
new file mode 100644 (file)
index 0000000..dc7fdbb
--- /dev/null
@@ -0,0 +1,495 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+//#include "extract-word.h"
+#include "parse-util.h"
+#include "string-util.h"
+#include "util.h"
+
+int parse_boolean(const char *v) {
+        assert(v);
+
+        if (streq(v, "1") || strcaseeq(v, "yes") || strcaseeq(v, "y") || strcaseeq(v, "true") || strcaseeq(v, "t") || strcaseeq(v, "on"))
+                return 1;
+        else if (streq(v, "0") || strcaseeq(v, "no") || strcaseeq(v, "n") || strcaseeq(v, "false") || strcaseeq(v, "f") || strcaseeq(v, "off"))
+                return 0;
+
+        return -EINVAL;
+}
+
+int parse_pid(const char *s, pid_t* ret_pid) {
+        unsigned long ul = 0;
+        pid_t pid;
+        int r;
+
+        assert(s);
+        assert(ret_pid);
+
+        r = safe_atolu(s, &ul);
+        if (r < 0)
+                return r;
+
+        pid = (pid_t) ul;
+
+        if ((unsigned long) pid != ul)
+                return -ERANGE;
+
+        if (pid <= 0)
+                return -ERANGE;
+
+        *ret_pid = pid;
+        return 0;
+}
+
+int parse_mode(const char *s, mode_t *ret) {
+        char *x;
+        long l;
+
+        assert(s);
+        assert(ret);
+
+        s += strspn(s, WHITESPACE);
+        if (s[0] == '-')
+                return -ERANGE;
+
+        errno = 0;
+        l = strtol(s, &x, 8);
+        if (errno != 0)
+                return -errno;
+        if (!x || x == s || *x)
+                return -EINVAL;
+        if (l < 0 || l  > 07777)
+                return -ERANGE;
+
+        *ret = (mode_t) l;
+        return 0;
+}
+
+int parse_ifindex(const char *s, int *ret) {
+        int ifi, r;
+
+        r = safe_atoi(s, &ifi);
+        if (r < 0)
+                return r;
+        if (ifi <= 0)
+                return -EINVAL;
+
+        *ret = ifi;
+        return 0;
+}
+
+int parse_size(const char *t, uint64_t base, uint64_t *size) {
+
+        /* Soo, sometimes we want to parse IEC binary suffixes, and
+         * sometimes SI decimal suffixes. This function can parse
+         * both. Which one is the right way depends on the
+         * context. Wikipedia suggests that SI is customary for
+         * hardware metrics and network speeds, while IEC is
+         * customary for most data sizes used by software and volatile
+         * (RAM) memory. Hence be careful which one you pick!
+         *
+         * In either case we use just K, M, G as suffix, and not Ki,
+         * Mi, Gi or so (as IEC would suggest). That's because that's
+         * frickin' ugly. But this means you really need to make sure
+         * to document which base you are parsing when you use this
+         * call. */
+
+        struct table {
+                const char *suffix;
+                unsigned long long factor;
+        };
+
+        static const struct table iec[] = {
+                { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
+                { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
+                { "T", 1024ULL*1024ULL*1024ULL*1024ULL },
+                { "G", 1024ULL*1024ULL*1024ULL },
+                { "M", 1024ULL*1024ULL },
+                { "K", 1024ULL },
+                { "B", 1ULL },
+                { "",  1ULL },
+        };
+
+        static const struct table si[] = {
+                { "E", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL*1000ULL },
+                { "P", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL },
+                { "T", 1000ULL*1000ULL*1000ULL*1000ULL },
+                { "G", 1000ULL*1000ULL*1000ULL },
+                { "M", 1000ULL*1000ULL },
+                { "K", 1000ULL },
+                { "B", 1ULL },
+                { "",  1ULL },
+        };
+
+        const struct table *table;
+        const char *p;
+        unsigned long long r = 0;
+        unsigned n_entries, start_pos = 0;
+
+        assert(t);
+        assert(base == 1000 || base == 1024);
+        assert(size);
+
+        if (base == 1000) {
+                table = si;
+                n_entries = ELEMENTSOF(si);
+        } else {
+                table = iec;
+                n_entries = ELEMENTSOF(iec);
+        }
+
+        p = t;
+        do {
+                unsigned long long l, tmp;
+                double frac = 0;
+                char *e;
+                unsigned i;
+
+                p += strspn(p, WHITESPACE);
+
+                errno = 0;
+                l = strtoull(p, &e, 10);
+                if (errno != 0)
+                        return -errno;
+                if (e == p)
+                        return -EINVAL;
+                if (*p == '-')
+                        return -ERANGE;
+
+                if (*e == '.') {
+                        e++;
+
+                        /* strtoull() itself would accept space/+/- */
+                        if (*e >= '0' && *e <= '9') {
+                                unsigned long long l2;
+                                char *e2;
+
+                                l2 = strtoull(e, &e2, 10);
+                                if (errno != 0)
+                                        return -errno;
+
+                                /* Ignore failure. E.g. 10.M is valid */
+                                frac = l2;
+                                for (; e < e2; e++)
+                                        frac /= 10;
+                        }
+                }
+
+                e += strspn(e, WHITESPACE);
+
+                for (i = start_pos; i < n_entries; i++)
+                        if (startswith(e, table[i].suffix))
+                                break;
+
+                if (i >= n_entries)
+                        return -EINVAL;
+
+                if (l + (frac > 0) > ULLONG_MAX / table[i].factor)
+                        return -ERANGE;
+
+                tmp = l * table[i].factor + (unsigned long long) (frac * table[i].factor);
+                if (tmp > ULLONG_MAX - r)
+                        return -ERANGE;
+
+                r += tmp;
+                if ((unsigned long long) (uint64_t) r != r)
+                        return -ERANGE;
+
+                p = e + strlen(table[i].suffix);
+
+                start_pos = i + 1;
+
+        } while (*p);
+
+        *size = r;
+
+        return 0;
+}
+
+/// UNNEEDED by elogind
+#if 0
+int parse_range(const char *t, unsigned *lower, unsigned *upper) {
+        _cleanup_free_ char *word = NULL;
+        unsigned l, u;
+        int r;
+
+        assert(lower);
+        assert(upper);
+
+        /* Extract the lower bound. */
+        r = extract_first_word(&t, &word, "-", EXTRACT_DONT_COALESCE_SEPARATORS);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return -EINVAL;
+
+        r = safe_atou(word, &l);
+        if (r < 0)
+                return r;
+
+        /* Check for the upper bound and extract it if needed */
+        if (!t)
+                /* Single number with no dashes. */
+                u = l;
+        else if (!*t)
+                /* Trailing dash is an error. */
+                return -EINVAL;
+        else {
+                r = safe_atou(t, &u);
+                if (r < 0)
+                        return r;
+        }
+
+        *lower = l;
+        *upper = u;
+        return 0;
+}
+
+char *format_bytes(char *buf, size_t l, uint64_t t) {
+        unsigned i;
+
+        /* This only does IEC units so far */
+
+        static const struct {
+                const char *suffix;
+                uint64_t factor;
+        } table[] = {
+                { "E", UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024) },
+                { "P", UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024) },
+                { "T", UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024) },
+                { "G", UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024) },
+                { "M", UINT64_C(1024)*UINT64_C(1024) },
+                { "K", UINT64_C(1024) },
+        };
+
+        if (t == (uint64_t) -1)
+                return NULL;
+
+        for (i = 0; i < ELEMENTSOF(table); i++) {
+
+                if (t >= table[i].factor) {
+                        snprintf(buf, l,
+                                 "%" PRIu64 ".%" PRIu64 "%s",
+                                 t / table[i].factor,
+                                 ((t*UINT64_C(10)) / table[i].factor) % UINT64_C(10),
+                                 table[i].suffix);
+
+                        goto finish;
+                }
+        }
+
+        snprintf(buf, l, "%" PRIu64 "B", t);
+
+finish:
+        buf[l-1] = 0;
+        return buf;
+
+}
+#endif // 0
+
+int safe_atou(const char *s, unsigned *ret_u) {
+        char *x = NULL;
+        unsigned long l;
+
+        assert(s);
+        assert(ret_u);
+
+        /* strtoul() is happy to parse negative values, and silently
+         * converts them to unsigned values without generating an
+         * error. We want a clean error, hence let's look for the "-"
+         * prefix on our own, and generate an error. But let's do so
+         * only after strtoul() validated that the string is clean
+         * otherwise, so that we return EINVAL preferably over
+         * ERANGE. */
+
+        s += strspn(s, WHITESPACE);
+
+        errno = 0;
+        l = strtoul(s, &x, 0);
+        if (errno != 0)
+                return -errno;
+        if (!x || x == s || *x)
+                return -EINVAL;
+        if (s[0] == '-')
+                return -ERANGE;
+        if ((unsigned long) (unsigned) l != l)
+                return -ERANGE;
+
+        *ret_u = (unsigned) l;
+        return 0;
+}
+
+int safe_atoi(const char *s, int *ret_i) {
+        char *x = NULL;
+        long l;
+
+        assert(s);
+        assert(ret_i);
+
+        errno = 0;
+        l = strtol(s, &x, 0);
+        if (errno != 0)
+                return -errno;
+        if (!x || x == s || *x)
+                return -EINVAL;
+        if ((long) (int) l != l)
+                return -ERANGE;
+
+        *ret_i = (int) l;
+        return 0;
+}
+
+int safe_atollu(const char *s, long long unsigned *ret_llu) {
+        char *x = NULL;
+        unsigned long long l;
+
+        assert(s);
+        assert(ret_llu);
+
+        s += strspn(s, WHITESPACE);
+
+        errno = 0;
+        l = strtoull(s, &x, 0);
+        if (errno != 0)
+                return -errno;
+        if (!x || x == s || *x)
+                return -EINVAL;
+        if (*s == '-')
+                return -ERANGE;
+
+        *ret_llu = l;
+        return 0;
+}
+
+int safe_atolli(const char *s, long long int *ret_lli) {
+        char *x = NULL;
+        long long l;
+
+        assert(s);
+        assert(ret_lli);
+
+        errno = 0;
+        l = strtoll(s, &x, 0);
+        if (errno != 0)
+                return -errno;
+        if (!x || x == s || *x)
+                return -EINVAL;
+
+        *ret_lli = l;
+        return 0;
+}
+
+int safe_atou8(const char *s, uint8_t *ret) {
+        char *x = NULL;
+        unsigned long l;
+
+        assert(s);
+        assert(ret);
+
+        s += strspn(s, WHITESPACE);
+
+        errno = 0;
+        l = strtoul(s, &x, 0);
+        if (errno != 0)
+                return -errno;
+        if (!x || x == s || *x)
+                return -EINVAL;
+        if (s[0] == '-')
+                return -ERANGE;
+        if ((unsigned long) (uint8_t) l != l)
+                return -ERANGE;
+
+        *ret = (uint8_t) l;
+        return 0;
+}
+
+int safe_atou16(const char *s, uint16_t *ret) {
+        char *x = NULL;
+        unsigned long l;
+
+        assert(s);
+        assert(ret);
+
+        s += strspn(s, WHITESPACE);
+
+        errno = 0;
+        l = strtoul(s, &x, 0);
+        if (errno != 0)
+                return -errno;
+        if (!x || x == s || *x)
+                return -EINVAL;
+        if (s[0] == '-')
+                return -ERANGE;
+        if ((unsigned long) (uint16_t) l != l)
+                return -ERANGE;
+
+        *ret = (uint16_t) l;
+        return 0;
+}
+
+int safe_atoi16(const char *s, int16_t *ret) {
+        char *x = NULL;
+        long l;
+
+        assert(s);
+        assert(ret);
+
+        errno = 0;
+        l = strtol(s, &x, 0);
+        if (errno != 0)
+                return -errno;
+        if (!x || x == s || *x)
+                return -EINVAL;
+        if ((long) (int16_t) l != l)
+                return -ERANGE;
+
+        *ret = (int16_t) l;
+        return 0;
+}
+
+int safe_atod(const char *s, double *ret_d) {
+        char *x = NULL;
+        double d = 0;
+        locale_t loc;
+
+        assert(s);
+        assert(ret_d);
+
+        loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0);
+        if (loc == (locale_t) 0)
+                return -errno;
+
+        errno = 0;
+        d = strtod_l(s, &x, loc);
+        if (errno != 0) {
+                freelocale(loc);
+                return -errno;
+        }
+        if (!x || x == s || *x) {
+                freelocale(loc);
+                return -EINVAL;
+        }
+
+        freelocale(loc);
+        *ret_d = (double) d;
+        return 0;
+}
diff --git a/src/basic/parse-util.h b/src/basic/parse-util.h
new file mode 100644 (file)
index 0000000..7dac767
--- /dev/null
@@ -0,0 +1,92 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <inttypes.h>
+#include <sys/types.h>
+
+#include "macro.h"
+
+#define MODE_INVALID ((mode_t) -1)
+
+int parse_boolean(const char *v) _pure_;
+int parse_pid(const char *s, pid_t* ret_pid);
+int parse_mode(const char *s, mode_t *ret);
+int parse_ifindex(const char *s, int *ret);
+
+int parse_size(const char *t, uint64_t base, uint64_t *size);
+// UNNEEDED int parse_range(const char *t, unsigned *lower, unsigned *upper);
+
+// UNNEEDED #define FORMAT_BYTES_MAX 8
+// UNNEEDED char *format_bytes(char *buf, size_t l, uint64_t t);
+
+int safe_atou(const char *s, unsigned *ret_u);
+int safe_atoi(const char *s, int *ret_i);
+int safe_atollu(const char *s, unsigned long long *ret_u);
+int safe_atolli(const char *s, long long int *ret_i);
+
+int safe_atou8(const char *s, uint8_t *ret);
+
+int safe_atou16(const char *s, uint16_t *ret);
+int safe_atoi16(const char *s, int16_t *ret);
+
+static inline int safe_atou32(const char *s, uint32_t *ret_u) {
+        assert_cc(sizeof(uint32_t) == sizeof(unsigned));
+        return safe_atou(s, (unsigned*) ret_u);
+}
+
+static inline int safe_atoi32(const char *s, int32_t *ret_i) {
+        assert_cc(sizeof(int32_t) == sizeof(int));
+        return safe_atoi(s, (int*) ret_i);
+}
+
+static inline int safe_atou64(const char *s, uint64_t *ret_u) {
+        assert_cc(sizeof(uint64_t) == sizeof(unsigned long long));
+        return safe_atollu(s, (unsigned long long*) ret_u);
+}
+
+static inline int safe_atoi64(const char *s, int64_t *ret_i) {
+        assert_cc(sizeof(int64_t) == sizeof(long long int));
+        return safe_atolli(s, (long long int*) ret_i);
+}
+
+#if LONG_MAX == INT_MAX
+static inline int safe_atolu(const char *s, unsigned long *ret_u) {
+        assert_cc(sizeof(unsigned long) == sizeof(unsigned));
+        return safe_atou(s, (unsigned*) ret_u);
+}
+static inline int safe_atoli(const char *s, long int *ret_u) {
+        assert_cc(sizeof(long int) == sizeof(int));
+        return safe_atoi(s, (int*) ret_u);
+}
+#else
+static inline int safe_atolu(const char *s, unsigned long *ret_u) {
+        assert_cc(sizeof(unsigned long) == sizeof(unsigned long long));
+        return safe_atollu(s, (unsigned long long*) ret_u);
+}
+static inline int safe_atoli(const char *s, long int *ret_u) {
+        assert_cc(sizeof(long int) == sizeof(long long int));
+        return safe_atolli(s, (long long int*) ret_u);
+}
+#endif
+
+int safe_atod(const char *s, double *ret_d);
diff --git a/src/basic/proc-cmdline.c b/src/basic/proc-cmdline.c
new file mode 100644 (file)
index 0000000..4a36d05
--- /dev/null
@@ -0,0 +1,177 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "extract-word.h"
+#include "fileio.h"
+#include "macro.h"
+#include "parse-util.h"
+#include "proc-cmdline.h"
+#include "process-util.h"
+//#include "special.h"
+#include "string-util.h"
+#include "util.h"
+#include "virt.h"
+
+int proc_cmdline(char **ret) {
+        assert(ret);
+
+        if (detect_container() > 0)
+                return get_process_cmdline(1, 0, false, ret);
+        else
+                return read_one_line_file("/proc/cmdline", ret);
+}
+
+int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) {
+        _cleanup_free_ char *line = NULL;
+        const char *p;
+        int r;
+
+        assert(parse_item);
+
+        r = proc_cmdline(&line);
+        if (r < 0)
+                return r;
+
+        p = line;
+        for (;;) {
+                _cleanup_free_ char *word = NULL;
+                char *value = NULL;
+
+                r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX);
+                if (r < 0)
+                        return r;
+                if (r == 0)
+                        break;
+
+                /* Filter out arguments that are intended only for the
+                 * initrd */
+                if (!in_initrd() && startswith(word, "rd."))
+                        continue;
+
+                value = strchr(word, '=');
+                if (value)
+                        *(value++) = 0;
+
+                r = parse_item(word, value);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+int get_proc_cmdline_key(const char *key, char **value) {
+        _cleanup_free_ char *line = NULL, *ret = NULL;
+        bool found = false;
+        const char *p;
+        int r;
+
+        assert(key);
+
+        r = proc_cmdline(&line);
+        if (r < 0)
+                return r;
+
+        p = line;
+        for (;;) {
+                _cleanup_free_ char *word = NULL;
+                const char *e;
+
+                r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX);
+                if (r < 0)
+                        return r;
+                if (r == 0)
+                        break;
+
+                /* Filter out arguments that are intended only for the
+                 * initrd */
+                if (!in_initrd() && startswith(word, "rd."))
+                        continue;
+
+                if (value) {
+                        e = startswith(word, key);
+                        if (!e)
+                                continue;
+
+                        r = free_and_strdup(&ret, e);
+                        if (r < 0)
+                                return r;
+
+                        found = true;
+                } else {
+                        if (streq(word, key))
+                                found = true;
+                }
+        }
+
+        if (value) {
+                *value = ret;
+                ret = NULL;
+        }
+
+        return found;
+
+}
+
+/// UNNEEDED by elogind
+#if 0
+int shall_restore_state(void) {
+        _cleanup_free_ char *value = NULL;
+        int r;
+
+        r = get_proc_cmdline_key("systemd.restore_state=", &value);
+        if (r < 0)
+                return r;
+        if (r == 0)
+                return true;
+
+        return parse_boolean(value);
+}
+
+static const char * const rlmap[] = {
+        "emergency", SPECIAL_EMERGENCY_TARGET,
+        "-b",        SPECIAL_EMERGENCY_TARGET,
+        "rescue",    SPECIAL_RESCUE_TARGET,
+        "single",    SPECIAL_RESCUE_TARGET,
+        "-s",        SPECIAL_RESCUE_TARGET,
+        "s",         SPECIAL_RESCUE_TARGET,
+        "S",         SPECIAL_RESCUE_TARGET,
+        "1",         SPECIAL_RESCUE_TARGET,
+        "2",         SPECIAL_MULTI_USER_TARGET,
+        "3",         SPECIAL_MULTI_USER_TARGET,
+        "4",         SPECIAL_MULTI_USER_TARGET,
+        "5",         SPECIAL_GRAPHICAL_TARGET,
+};
+
+const char* runlevel_to_target(const char *word) {
+        size_t i;
+
+        if (!word)
+                return NULL;
+
+        for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
+                if (streq(word, rlmap[i]))
+                        return rlmap[i+1];
+
+        return NULL;
+}
+#endif // 0
similarity index 74%
rename from src/basic/label.h
rename to src/basic/proc-cmdline.h
index 455a729..e5a7d79 100644 (file)
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <stdbool.h>
-#include <sys/types.h>
+int proc_cmdline(char **ret);
+int parse_proc_cmdline(int (*parse_word)(const char *key, const char *value));
+int get_proc_cmdline_key(const char *parameter, char **value);
 
-int label_fix(const char *path, bool ignore_enoent, bool ignore_erofs);
-
-int mkdir_label(const char *path, mode_t mode);
-// UNNEEDED int symlink_label(const char *old_path, const char *new_path);
+// UNNEEDED int shall_restore_state(void);
+// UNNEEDED const char* runlevel_to_target(const char *rl);
diff --git a/src/basic/socket-util.c b/src/basic/socket-util.c
new file mode 100644 (file)
index 0000000..1acab1e
--- /dev/null
@@ -0,0 +1,937 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <net/if.h>
+#include <netdb.h>
+#include <netinet/ip.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "formats-util.h"
+#include "macro.h"
+#include "missing.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "socket-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "user-util.h"
+#include "util.h"
+
+int socket_address_parse(SocketAddress *a, const char *s) {
+        char *e, *n;
+        unsigned u;
+        int r;
+
+        assert(a);
+        assert(s);
+
+        zero(*a);
+        a->type = SOCK_STREAM;
+
+        if (*s == '[') {
+                /* IPv6 in [x:.....:z]:p notation */
+
+                e = strchr(s+1, ']');
+                if (!e)
+                        return -EINVAL;
+
+                n = strndupa(s+1, e-s-1);
+
+                errno = 0;
+                if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0)
+                        return errno > 0 ? -errno : -EINVAL;
+
+                e++;
+                if (*e != ':')
+                        return -EINVAL;
+
+                e++;
+                r = safe_atou(e, &u);
+                if (r < 0)
+                        return r;
+
+                if (u <= 0 || u > 0xFFFF)
+                        return -EINVAL;
+
+                a->sockaddr.in6.sin6_family = AF_INET6;
+                a->sockaddr.in6.sin6_port = htons((uint16_t) u);
+                a->size = sizeof(struct sockaddr_in6);
+
+        } else if (*s == '/') {
+                /* AF_UNIX socket */
+
+                size_t l;
+
+                l = strlen(s);
+                if (l >= sizeof(a->sockaddr.un.sun_path))
+                        return -EINVAL;
+
+                a->sockaddr.un.sun_family = AF_UNIX;
+                memcpy(a->sockaddr.un.sun_path, s, l);
+                a->size = offsetof(struct sockaddr_un, sun_path) + l + 1;
+
+        } else if (*s == '@') {
+                /* Abstract AF_UNIX socket */
+                size_t l;
+
+                l = strlen(s+1);
+                if (l >= sizeof(a->sockaddr.un.sun_path) - 1)
+                        return -EINVAL;
+
+                a->sockaddr.un.sun_family = AF_UNIX;
+                memcpy(a->sockaddr.un.sun_path+1, s+1, l);
+                a->size = offsetof(struct sockaddr_un, sun_path) + 1 + l;
+
+        } else {
+                e = strchr(s, ':');
+                if (e) {
+                        r = safe_atou(e+1, &u);
+                        if (r < 0)
+                                return r;
+
+                        if (u <= 0 || u > 0xFFFF)
+                                return -EINVAL;
+
+                        n = strndupa(s, e-s);
+
+                        /* IPv4 in w.x.y.z:p notation? */
+                        r = inet_pton(AF_INET, n, &a->sockaddr.in.sin_addr);
+                        if (r < 0)
+                                return -errno;
+
+                        if (r > 0) {
+                                /* Gotcha, it's a traditional IPv4 address */
+                                a->sockaddr.in.sin_family = AF_INET;
+                                a->sockaddr.in.sin_port = htons((uint16_t) u);
+                                a->size = sizeof(struct sockaddr_in);
+                        } else {
+                                unsigned idx;
+
+                                if (strlen(n) > IF_NAMESIZE-1)
+                                        return -EINVAL;
+
+                                /* Uh, our last resort, an interface name */
+                                idx = if_nametoindex(n);
+                                if (idx == 0)
+                                        return -EINVAL;
+
+                                a->sockaddr.in6.sin6_family = AF_INET6;
+                                a->sockaddr.in6.sin6_port = htons((uint16_t) u);
+                                a->sockaddr.in6.sin6_scope_id = idx;
+                                a->sockaddr.in6.sin6_addr = in6addr_any;
+                                a->size = sizeof(struct sockaddr_in6);
+                        }
+                } else {
+
+                        /* Just a port */
+                        r = safe_atou(s, &u);
+                        if (r < 0)
+                                return r;
+
+                        if (u <= 0 || u > 0xFFFF)
+                                return -EINVAL;
+
+                        if (socket_ipv6_is_supported()) {
+                                a->sockaddr.in6.sin6_family = AF_INET6;
+                                a->sockaddr.in6.sin6_port = htons((uint16_t) u);
+                                a->sockaddr.in6.sin6_addr = in6addr_any;
+                                a->size = sizeof(struct sockaddr_in6);
+                        } else {
+                                a->sockaddr.in.sin_family = AF_INET;
+                                a->sockaddr.in.sin_port = htons((uint16_t) u);
+                                a->sockaddr.in.sin_addr.s_addr = INADDR_ANY;
+                                a->size = sizeof(struct sockaddr_in);
+                        }
+                }
+        }
+
+        return 0;
+}
+
+int socket_address_parse_and_warn(SocketAddress *a, const char *s) {
+        SocketAddress b;
+        int r;
+
+        /* Similar to socket_address_parse() but warns for IPv6 sockets when we don't support them. */
+
+        r = socket_address_parse(&b, s);
+        if (r < 0)
+                return r;
+
+        if (!socket_ipv6_is_supported() && b.sockaddr.sa.sa_family == AF_INET6) {
+                log_warning("Binding to IPv6 address not available since kernel does not support IPv6.");
+                return -EAFNOSUPPORT;
+        }
+
+        *a = b;
+        return 0;
+}
+
+int socket_address_parse_netlink(SocketAddress *a, const char *s) {
+        int family;
+        unsigned group = 0;
+        _cleanup_free_ char *sfamily = NULL;
+        assert(a);
+        assert(s);
+
+        zero(*a);
+        a->type = SOCK_RAW;
+
+        errno = 0;
+        if (sscanf(s, "%ms %u", &sfamily, &group) < 1)
+                return errno > 0 ? -errno : -EINVAL;
+
+        family = netlink_family_from_string(sfamily);
+        if (family < 0)
+                return -EINVAL;
+
+        a->sockaddr.nl.nl_family = AF_NETLINK;
+        a->sockaddr.nl.nl_groups = group;
+
+        a->type = SOCK_RAW;
+        a->size = sizeof(struct sockaddr_nl);
+        a->protocol = family;
+
+        return 0;
+}
+
+int socket_address_verify(const SocketAddress *a) {
+        assert(a);
+
+        switch (socket_address_family(a)) {
+
+        case AF_INET:
+                if (a->size != sizeof(struct sockaddr_in))
+                        return -EINVAL;
+
+                if (a->sockaddr.in.sin_port == 0)
+                        return -EINVAL;
+
+                if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM)
+                        return -EINVAL;
+
+                return 0;
+
+        case AF_INET6:
+                if (a->size != sizeof(struct sockaddr_in6))
+                        return -EINVAL;
+
+                if (a->sockaddr.in6.sin6_port == 0)
+                        return -EINVAL;
+
+                if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM)
+                        return -EINVAL;
+
+                return 0;
+
+        case AF_UNIX:
+                if (a->size < offsetof(struct sockaddr_un, sun_path))
+                        return -EINVAL;
+
+                if (a->size > offsetof(struct sockaddr_un, sun_path)) {
+
+                        if (a->sockaddr.un.sun_path[0] != 0) {
+                                char *e;
+
+                                /* path */
+                                e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path));
+                                if (!e)
+                                        return -EINVAL;
+
+                                if (a->size != offsetof(struct sockaddr_un, sun_path) + (e - a->sockaddr.un.sun_path) + 1)
+                                        return -EINVAL;
+                        }
+                }
+
+                if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM && a->type != SOCK_SEQPACKET)
+                        return -EINVAL;
+
+                return 0;
+
+        case AF_NETLINK:
+
+                if (a->size != sizeof(struct sockaddr_nl))
+                        return -EINVAL;
+
+                if (a->type != SOCK_RAW && a->type != SOCK_DGRAM)
+                        return -EINVAL;
+
+                return 0;
+
+        default:
+                return -EAFNOSUPPORT;
+        }
+}
+
+int socket_address_print(const SocketAddress *a, char **ret) {
+        int r;
+
+        assert(a);
+        assert(ret);
+
+        r = socket_address_verify(a);
+        if (r < 0)
+                return r;
+
+        if (socket_address_family(a) == AF_NETLINK) {
+                _cleanup_free_ char *sfamily = NULL;
+
+                r = netlink_family_to_string_alloc(a->protocol, &sfamily);
+                if (r < 0)
+                        return r;
+
+                r = asprintf(ret, "%s %u", sfamily, a->sockaddr.nl.nl_groups);
+                if (r < 0)
+                        return -ENOMEM;
+
+                return 0;
+        }
+
+        return sockaddr_pretty(&a->sockaddr.sa, a->size, false, true, ret);
+}
+
+bool socket_address_can_accept(const SocketAddress *a) {
+        assert(a);
+
+        return
+                a->type == SOCK_STREAM ||
+                a->type == SOCK_SEQPACKET;
+}
+
+bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) {
+        assert(a);
+        assert(b);
+
+        /* Invalid addresses are unequal to all */
+        if (socket_address_verify(a) < 0 ||
+            socket_address_verify(b) < 0)
+                return false;
+
+        if (a->type != b->type)
+                return false;
+
+        if (socket_address_family(a) != socket_address_family(b))
+                return false;
+
+        switch (socket_address_family(a)) {
+
+        case AF_INET:
+                if (a->sockaddr.in.sin_addr.s_addr != b->sockaddr.in.sin_addr.s_addr)
+                        return false;
+
+                if (a->sockaddr.in.sin_port != b->sockaddr.in.sin_port)
+                        return false;
+
+                break;
+
+        case AF_INET6:
+                if (memcmp(&a->sockaddr.in6.sin6_addr, &b->sockaddr.in6.sin6_addr, sizeof(a->sockaddr.in6.sin6_addr)) != 0)
+                        return false;
+
+                if (a->sockaddr.in6.sin6_port != b->sockaddr.in6.sin6_port)
+                        return false;
+
+                break;
+
+        case AF_UNIX:
+                if (a->size <= offsetof(struct sockaddr_un, sun_path) ||
+                    b->size <= offsetof(struct sockaddr_un, sun_path))
+                        return false;
+
+                if ((a->sockaddr.un.sun_path[0] == 0) != (b->sockaddr.un.sun_path[0] == 0))
+                        return false;
+
+                if (a->sockaddr.un.sun_path[0]) {
+                        if (!path_equal_or_files_same(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path))
+                                return false;
+                } else {
+                        if (a->size != b->size)
+                                return false;
+
+                        if (memcmp(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, a->size) != 0)
+                                return false;
+                }
+
+                break;
+
+        case AF_NETLINK:
+                if (a->protocol != b->protocol)
+                        return false;
+
+                if (a->sockaddr.nl.nl_groups != b->sockaddr.nl.nl_groups)
+                        return false;
+
+                break;
+
+        default:
+                /* Cannot compare, so we assume the addresses are different */
+                return false;
+        }
+
+        return true;
+}
+
+bool socket_address_is(const SocketAddress *a, const char *s, int type) {
+        struct SocketAddress b;
+
+        assert(a);
+        assert(s);
+
+        if (socket_address_parse(&b, s) < 0)
+                return false;
+
+        b.type = type;
+
+        return socket_address_equal(a, &b);
+}
+
+bool socket_address_is_netlink(const SocketAddress *a, const char *s) {
+        struct SocketAddress b;
+
+        assert(a);
+        assert(s);
+
+        if (socket_address_parse_netlink(&b, s) < 0)
+                return false;
+
+        return socket_address_equal(a, &b);
+}
+
+const char* socket_address_get_path(const SocketAddress *a) {
+        assert(a);
+
+        if (socket_address_family(a) != AF_UNIX)
+                return NULL;
+
+        if (a->sockaddr.un.sun_path[0] == 0)
+                return NULL;
+
+        return a->sockaddr.un.sun_path;
+}
+
+bool socket_ipv6_is_supported(void) {
+        _cleanup_free_ char *l = NULL;
+
+        if (access("/sys/module/ipv6", F_OK) != 0)
+                return false;
+
+        /* If we can't check "disable" parameter, assume enabled */
+        if (read_one_line_file("/sys/module/ipv6/parameters/disable", &l) < 0)
+                return true;
+
+        /* If module was loaded with disable=1 no IPv6 available */
+        return l[0] == '0';
+}
+
+bool socket_address_matches_fd(const SocketAddress *a, int fd) {
+        SocketAddress b;
+        socklen_t solen;
+
+        assert(a);
+        assert(fd >= 0);
+
+        b.size = sizeof(b.sockaddr);
+        if (getsockname(fd, &b.sockaddr.sa, &b.size) < 0)
+                return false;
+
+        if (b.sockaddr.sa.sa_family != a->sockaddr.sa.sa_family)
+                return false;
+
+        solen = sizeof(b.type);
+        if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &b.type, &solen) < 0)
+                return false;
+
+        if (b.type != a->type)
+                return false;
+
+        if (a->protocol != 0)  {
+                solen = sizeof(b.protocol);
+                if (getsockopt(fd, SOL_SOCKET, SO_PROTOCOL, &b.protocol, &solen) < 0)
+                        return false;
+
+                if (b.protocol != a->protocol)
+                        return false;
+        }
+
+        return socket_address_equal(a, &b);
+}
+
+int sockaddr_port(const struct sockaddr *_sa) {
+        union sockaddr_union *sa = (union sockaddr_union*) _sa;
+
+        assert(sa);
+
+        if (!IN_SET(sa->sa.sa_family, AF_INET, AF_INET6))
+                return -EAFNOSUPPORT;
+
+        return ntohs(sa->sa.sa_family == AF_INET6 ?
+                       sa->in6.sin6_port :
+                       sa->in.sin_port);
+}
+
+int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret) {
+        union sockaddr_union *sa = (union sockaddr_union*) _sa;
+        char *p;
+        int r;
+
+        assert(sa);
+        assert(salen >= sizeof(sa->sa.sa_family));
+
+        switch (sa->sa.sa_family) {
+
+        case AF_INET: {
+                uint32_t a;
+
+                a = ntohl(sa->in.sin_addr.s_addr);
+
+                if (include_port)
+                        r = asprintf(&p,
+                                     "%u.%u.%u.%u:%u",
+                                     a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
+                                     ntohs(sa->in.sin_port));
+                else
+                        r = asprintf(&p,
+                                     "%u.%u.%u.%u",
+                                     a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF);
+                if (r < 0)
+                        return -ENOMEM;
+                break;
+        }
+
+        case AF_INET6: {
+                static const unsigned char ipv4_prefix[] = {
+                        0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
+                };
+
+                if (translate_ipv6 &&
+                    memcmp(&sa->in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
+                        const uint8_t *a = sa->in6.sin6_addr.s6_addr+12;
+                        if (include_port)
+                                r = asprintf(&p,
+                                             "%u.%u.%u.%u:%u",
+                                             a[0], a[1], a[2], a[3],
+                                             ntohs(sa->in6.sin6_port));
+                        else
+                                r = asprintf(&p,
+                                             "%u.%u.%u.%u",
+                                             a[0], a[1], a[2], a[3]);
+                        if (r < 0)
+                                return -ENOMEM;
+                } else {
+                        char a[INET6_ADDRSTRLEN];
+
+                        inet_ntop(AF_INET6, &sa->in6.sin6_addr, a, sizeof(a));
+
+                        if (include_port) {
+                                r = asprintf(&p,
+                                             "[%s]:%u",
+                                             a,
+                                             ntohs(sa->in6.sin6_port));
+                                if (r < 0)
+                                        return -ENOMEM;
+                        } else {
+                                p = strdup(a);
+                                if (!p)
+                                        return -ENOMEM;
+                        }
+                }
+
+                break;
+        }
+
+        case AF_UNIX:
+                if (salen <= offsetof(struct sockaddr_un, sun_path)) {
+                        p = strdup("<unnamed>");
+                        if (!p)
+                                return -ENOMEM;
+
+                } else if (sa->un.sun_path[0] == 0) {
+                        /* abstract */
+
+                        /* FIXME: We assume we can print the
+                         * socket path here and that it hasn't
+                         * more than one NUL byte. That is
+                         * actually an invalid assumption */
+
+                        p = new(char, sizeof(sa->un.sun_path)+1);
+                        if (!p)
+                                return -ENOMEM;
+
+                        p[0] = '@';
+                        memcpy(p+1, sa->un.sun_path+1, sizeof(sa->un.sun_path)-1);
+                        p[sizeof(sa->un.sun_path)] = 0;
+
+                } else {
+                        p = strndup(sa->un.sun_path, sizeof(sa->un.sun_path));
+                        if (!p)
+                                return -ENOMEM;
+                }
+
+                break;
+
+        default:
+                return -EOPNOTSUPP;
+        }
+
+
+        *ret = p;
+        return 0;
+}
+
+int getpeername_pretty(int fd, char **ret) {
+        union sockaddr_union sa;
+        socklen_t salen = sizeof(sa);
+        int r;
+
+        assert(fd >= 0);
+        assert(ret);
+
+        if (getpeername(fd, &sa.sa, &salen) < 0)
+                return -errno;
+
+        if (sa.sa.sa_family == AF_UNIX) {
+                struct ucred ucred = {};
+
+                /* UNIX connection sockets are anonymous, so let's use
+                 * PID/UID as pretty credentials instead */
+
+                r = getpeercred(fd, &ucred);
+                if (r < 0)
+                        return r;
+
+                if (asprintf(ret, "PID "PID_FMT"/UID "UID_FMT, ucred.pid, ucred.uid) < 0)
+                        return -ENOMEM;
+
+                return 0;
+        }
+
+        /* For remote sockets we translate IPv6 addresses back to IPv4
+         * if applicable, since that's nicer. */
+
+        return sockaddr_pretty(&sa.sa, salen, true, true, ret);
+}
+
+int getsockname_pretty(int fd, char **ret) {
+        union sockaddr_union sa;
+        socklen_t salen = sizeof(sa);
+
+        assert(fd >= 0);
+        assert(ret);
+
+        if (getsockname(fd, &sa.sa, &salen) < 0)
+                return -errno;
+
+        /* For local sockets we do not translate IPv6 addresses back
+         * to IPv6 if applicable, since this is usually used for
+         * listening sockets where the difference between IPv4 and
+         * IPv6 matters. */
+
+        return sockaddr_pretty(&sa.sa, salen, false, true, ret);
+}
+
+int socknameinfo_pretty(union sockaddr_union *sa, socklen_t salen, char **_ret) {
+        int r;
+        char host[NI_MAXHOST], *ret;
+
+        assert(_ret);
+
+        r = getnameinfo(&sa->sa, salen, host, sizeof(host), NULL, 0,
+                        NI_IDN|NI_IDN_USE_STD3_ASCII_RULES);
+        if (r != 0) {
+                int saved_errno = errno;
+
+                r = sockaddr_pretty(&sa->sa, salen, true, true, &ret);
+                if (r < 0)
+                        return r;
+
+                log_debug_errno(saved_errno, "getnameinfo(%s) failed: %m", ret);
+        } else {
+                ret = strdup(host);
+                if (!ret)
+                        return -ENOMEM;
+        }
+
+        *_ret = ret;
+        return 0;
+}
+
+int getnameinfo_pretty(int fd, char **ret) {
+        union sockaddr_union sa;
+        socklen_t salen = sizeof(sa);
+
+        assert(fd >= 0);
+        assert(ret);
+
+        if (getsockname(fd, &sa.sa, &salen) < 0)
+                return -errno;
+
+        return socknameinfo_pretty(&sa, salen, ret);
+}
+
+int socket_address_unlink(SocketAddress *a) {
+        assert(a);
+
+        if (socket_address_family(a) != AF_UNIX)
+                return 0;
+
+        if (a->sockaddr.un.sun_path[0] == 0)
+                return 0;
+
+        if (unlink(a->sockaddr.un.sun_path) < 0)
+                return -errno;
+
+        return 1;
+}
+
+static const char* const netlink_family_table[] = {
+        [NETLINK_ROUTE] = "route",
+        [NETLINK_FIREWALL] = "firewall",
+        [NETLINK_INET_DIAG] = "inet-diag",
+        [NETLINK_NFLOG] = "nflog",
+        [NETLINK_XFRM] = "xfrm",
+        [NETLINK_SELINUX] = "selinux",
+        [NETLINK_ISCSI] = "iscsi",
+        [NETLINK_AUDIT] = "audit",
+        [NETLINK_FIB_LOOKUP] = "fib-lookup",
+        [NETLINK_CONNECTOR] = "connector",
+        [NETLINK_NETFILTER] = "netfilter",
+        [NETLINK_IP6_FW] = "ip6-fw",
+        [NETLINK_DNRTMSG] = "dnrtmsg",
+        [NETLINK_KOBJECT_UEVENT] = "kobject-uevent",
+        [NETLINK_GENERIC] = "generic",
+        [NETLINK_SCSITRANSPORT] = "scsitransport",
+        [NETLINK_ECRYPTFS] = "ecryptfs"
+};
+
+DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(netlink_family, int, INT_MAX);
+
+static const char* const socket_address_bind_ipv6_only_table[_SOCKET_ADDRESS_BIND_IPV6_ONLY_MAX] = {
+        [SOCKET_ADDRESS_DEFAULT] = "default",
+        [SOCKET_ADDRESS_BOTH] = "both",
+        [SOCKET_ADDRESS_IPV6_ONLY] = "ipv6-only"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(socket_address_bind_ipv6_only, SocketAddressBindIPv6Only);
+
+bool sockaddr_equal(const union sockaddr_union *a, const union sockaddr_union *b) {
+        assert(a);
+        assert(b);
+
+        if (a->sa.sa_family != b->sa.sa_family)
+                return false;
+
+        if (a->sa.sa_family == AF_INET)
+                return a->in.sin_addr.s_addr == b->in.sin_addr.s_addr;
+
+        if (a->sa.sa_family == AF_INET6)
+                return memcmp(&a->in6.sin6_addr, &b->in6.sin6_addr, sizeof(a->in6.sin6_addr)) == 0;
+
+        return false;
+}
+
+int fd_inc_sndbuf(int fd, size_t n) {
+        int r, value;
+        socklen_t l = sizeof(value);
+
+        r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l);
+        if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2)
+                return 0;
+
+        /* If we have the privileges we will ignore the kernel limit. */
+
+        value = (int) n;
+        if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0)
+                if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
+                        return -errno;
+
+        return 1;
+}
+
+int fd_inc_rcvbuf(int fd, size_t n) {
+        int r, value;
+        socklen_t l = sizeof(value);
+
+        r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l);
+        if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2)
+                return 0;
+
+        /* If we have the privileges we will ignore the kernel limit. */
+
+        value = (int) n;
+        if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0)
+                if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
+                        return -errno;
+        return 1;
+}
+
+static const char* const ip_tos_table[] = {
+        [IPTOS_LOWDELAY] = "low-delay",
+        [IPTOS_THROUGHPUT] = "throughput",
+        [IPTOS_RELIABILITY] = "reliability",
+        [IPTOS_LOWCOST] = "low-cost",
+};
+
+DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff);
+
+int getpeercred(int fd, struct ucred *ucred) {
+        socklen_t n = sizeof(struct ucred);
+        struct ucred u;
+        int r;
+
+        assert(fd >= 0);
+        assert(ucred);
+
+        r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &u, &n);
+        if (r < 0)
+                return -errno;
+
+        if (n != sizeof(struct ucred))
+                return -EIO;
+
+        /* Check if the data is actually useful and not suppressed due
+         * to namespacing issues */
+        if (u.pid <= 0)
+                return -ENODATA;
+        if (u.uid == UID_INVALID)
+                return -ENODATA;
+        if (u.gid == GID_INVALID)
+                return -ENODATA;
+
+        *ucred = u;
+        return 0;
+}
+
+int getpeersec(int fd, char **ret) {
+        socklen_t n = 64;
+        char *s;
+        int r;
+
+        assert(fd >= 0);
+        assert(ret);
+
+        s = new0(char, n);
+        if (!s)
+                return -ENOMEM;
+
+        r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n);
+        if (r < 0) {
+                free(s);
+
+                if (errno != ERANGE)
+                        return -errno;
+
+                s = new0(char, n);
+                if (!s)
+                        return -ENOMEM;
+
+                r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n);
+                if (r < 0) {
+                        free(s);
+                        return -errno;
+                }
+        }
+
+        if (isempty(s)) {
+                free(s);
+                return -EOPNOTSUPP;
+        }
+
+        *ret = s;
+        return 0;
+}
+
+int send_one_fd(int transport_fd, int fd, int flags) {
+        union {
+                struct cmsghdr cmsghdr;
+                uint8_t buf[CMSG_SPACE(sizeof(int))];
+        } control = {};
+        struct msghdr mh = {
+                .msg_control = &control,
+                .msg_controllen = sizeof(control),
+        };
+        struct cmsghdr *cmsg;
+
+        assert(transport_fd >= 0);
+        assert(fd >= 0);
+
+        cmsg = CMSG_FIRSTHDR(&mh);
+        cmsg->cmsg_level = SOL_SOCKET;
+        cmsg->cmsg_type = SCM_RIGHTS;
+        cmsg->cmsg_len = CMSG_LEN(sizeof(int));
+        memcpy(CMSG_DATA(cmsg), &fd, sizeof(int));
+
+        mh.msg_controllen = CMSG_SPACE(sizeof(int));
+        if (sendmsg(transport_fd, &mh, MSG_NOSIGNAL | flags) < 0)
+                return -errno;
+
+        return 0;
+}
+
+int receive_one_fd(int transport_fd, int flags) {
+        union {
+                struct cmsghdr cmsghdr;
+                uint8_t buf[CMSG_SPACE(sizeof(int))];
+        } control = {};
+        struct msghdr mh = {
+                .msg_control = &control,
+                .msg_controllen = sizeof(control),
+        };
+        struct cmsghdr *cmsg, *found = NULL;
+
+        assert(transport_fd >= 0);
+
+        /*
+         * Receive a single FD via @transport_fd. We don't care for
+         * the transport-type. We retrieve a single FD at most, so for
+         * packet-based transports, the caller must ensure to send
+         * only a single FD per packet.  This is best used in
+         * combination with send_one_fd().
+         */
+
+        if (recvmsg(transport_fd, &mh, MSG_NOSIGNAL | MSG_CMSG_CLOEXEC | flags) < 0)
+                return -errno;
+
+        CMSG_FOREACH(cmsg, &mh) {
+                if (cmsg->cmsg_level == SOL_SOCKET &&
+                    cmsg->cmsg_type == SCM_RIGHTS &&
+                    cmsg->cmsg_len == CMSG_LEN(sizeof(int))) {
+                        assert(!found);
+                        found = cmsg;
+                        break;
+                }
+        }
+
+        if (!found) {
+                cmsg_close_all(&mh);
+                return -EIO;
+        }
+
+        return *(int*) CMSG_DATA(found);
+}
diff --git a/src/basic/stat-util.c b/src/basic/stat-util.c
new file mode 100644 (file)
index 0000000..baa3b5c
--- /dev/null
@@ -0,0 +1,231 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010-2012 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <linux/magic.h>
+#include <sys/statvfs.h>
+#include <unistd.h>
+
+#include "dirent-util.h"
+#include "fd-util.h"
+#include "macro.h"
+#include "missing.h"
+#include "stat-util.h"
+#include "string-util.h"
+
+/// UNNEEDED by elogind
+#if 0
+int is_symlink(const char *path) {
+        struct stat info;
+
+        assert(path);
+
+        if (lstat(path, &info) < 0)
+                return -errno;
+
+        return !!S_ISLNK(info.st_mode);
+}
+#endif // 0
+
+int is_dir(const char* path, bool follow) {
+        struct stat st;
+        int r;
+
+        assert(path);
+
+        if (follow)
+                r = stat(path, &st);
+        else
+                r = lstat(path, &st);
+        if (r < 0)
+                return -errno;
+
+        return !!S_ISDIR(st.st_mode);
+}
+
+/// UNNEEDED by elogind
+#if 0
+int is_device_node(const char *path) {
+        struct stat info;
+
+        assert(path);
+
+        if (lstat(path, &info) < 0)
+                return -errno;
+
+        return !!(S_ISBLK(info.st_mode) || S_ISCHR(info.st_mode));
+}
+
+int dir_is_empty(const char *path) {
+        _cleanup_closedir_ DIR *d;
+        struct dirent *de;
+
+        d = opendir(path);
+        if (!d)
+                return -errno;
+
+        FOREACH_DIRENT(de, d, return -errno)
+                return 0;
+
+        return 1;
+}
+#endif // 0
+
+bool null_or_empty(struct stat *st) {
+        assert(st);
+
+        if (S_ISREG(st->st_mode) && st->st_size <= 0)
+                return true;
+
+        /* We don't want to hardcode the major/minor of /dev/null,
+         * hence we do a simpler "is this a device node?" check. */
+
+        if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode))
+                return true;
+
+        return false;
+}
+
+int null_or_empty_path(const char *fn) {
+        struct stat st;
+
+        assert(fn);
+
+        if (stat(fn, &st) < 0)
+                return -errno;
+
+        return null_or_empty(&st);
+}
+
+/// UNNEEDED by elogind
+#if 0
+int null_or_empty_fd(int fd) {
+        struct stat st;
+
+        assert(fd >= 0);
+
+        if (fstat(fd, &st) < 0)
+                return -errno;
+
+        return null_or_empty(&st);
+}
+#endif // 0
+
+int path_is_read_only_fs(const char *path) {
+        struct statvfs st;
+
+        assert(path);
+
+        if (statvfs(path, &st) < 0)
+                return -errno;
+
+        if (st.f_flag & ST_RDONLY)
+                return true;
+
+        /* On NFS, statvfs() might not reflect whether we can actually
+         * write to the remote share. Let's try again with
+         * access(W_OK) which is more reliable, at least sometimes. */
+        if (access(path, W_OK) < 0 && errno == EROFS)
+                return true;
+
+        return false;
+}
+
+/// UNNEEDED by elogind
+#if 0
+int path_is_os_tree(const char *path) {
+        char *p;
+        int r;
+
+        assert(path);
+
+        /* We use /usr/lib/os-release as flag file if something is an OS */
+        p = strjoina(path, "/usr/lib/os-release");
+        r = access(p, F_OK);
+        if (r >= 0)
+                return 1;
+
+        /* Also check for the old location in /etc, just in case. */
+        p = strjoina(path, "/etc/os-release");
+        r = access(p, F_OK);
+
+        return r >= 0;
+}
+#endif // 0
+
+int files_same(const char *filea, const char *fileb) {
+        struct stat a, b;
+
+        assert(filea);
+        assert(fileb);
+
+        if (stat(filea, &a) < 0)
+                return -errno;
+
+        if (stat(fileb, &b) < 0)
+                return -errno;
+
+        return a.st_dev == b.st_dev &&
+               a.st_ino == b.st_ino;
+}
+
+bool is_fs_type(const struct statfs *s, statfs_f_type_t magic_value) {
+        assert(s);
+        assert_cc(sizeof(statfs_f_type_t) >= sizeof(s->f_type));
+
+        return F_TYPE_EQUAL(s->f_type, magic_value);
+}
+
+/// UNNEEDED by elogind
+#if 0
+int fd_check_fstype(int fd, statfs_f_type_t magic_value) {
+        struct statfs s;
+
+        if (fstatfs(fd, &s) < 0)
+                return -errno;
+
+        return is_fs_type(&s, magic_value);
+}
+
+int path_check_fstype(const char *path, statfs_f_type_t magic_value) {
+        _cleanup_close_ int fd = -1;
+
+        fd = open(path, O_RDONLY);
+        if (fd < 0)
+                return -errno;
+
+        return fd_check_fstype(fd, magic_value);
+}
+#endif // 0
+
+bool is_temporary_fs(const struct statfs *s) {
+    return is_fs_type(s, TMPFS_MAGIC) ||
+           is_fs_type(s, RAMFS_MAGIC);
+}
+
+int fd_is_temporary_fs(int fd) {
+        struct statfs s;
+
+        if (fstatfs(fd, &s) < 0)
+                return -errno;
+
+        return is_temporary_fs(&s);
+}
diff --git a/src/basic/stat-util.h b/src/basic/stat-util.h
new file mode 100644 (file)
index 0000000..7c93dd5
--- /dev/null
@@ -0,0 +1,73 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010-2012 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/vfs.h>
+
+#include "macro.h"
+
+// UNNEEDED int is_symlink(const char *path);
+int is_dir(const char *path, bool follow);
+// UNNEEDED int is_device_node(const char *path);
+
+// UNNEEDED int dir_is_empty(const char *path);
+
+/// UNNEEDED by elogind
+#if 0
+static inline int dir_is_populated(const char *path) {
+        int r;
+        r = dir_is_empty(path);
+        if (r < 0)
+                return r;
+        return !r;
+}
+#endif // 0
+
+bool null_or_empty(struct stat *st) _pure_;
+int null_or_empty_path(const char *fn);
+// UNNEEDED int null_or_empty_fd(int fd);
+
+int path_is_read_only_fs(const char *path);
+// UNNEEDED int path_is_os_tree(const char *path);
+
+int files_same(const char *filea, const char *fileb);
+
+/* The .f_type field of struct statfs is really weird defined on
+ * different archs. Let's use our own type we know is sufficiently
+ * larger to store the possible values. */
+typedef long statfs_f_type_t;
+
+bool is_fs_type(const struct statfs *s, statfs_f_type_t magic_value) _pure_;
+// UNNEEDED int fd_check_fstype(int fd, statfs_f_type_t magic_value);
+// UNNEEDED int path_check_fstype(const char *path, statfs_f_type_t magic_value);
+
+bool is_temporary_fs(const struct statfs *s) _pure_;
+int fd_is_temporary_fs(int fd);
+
+/* Because statfs.t_type can be int on some architectures, we have to cast
+ * the const magic to the type, otherwise the compiler warns about
+ * signed/unsigned comparison, because the magic can be 32 bit unsigned.
+ */
+#define F_TYPE_EQUAL(a, b) (a == (typeof(a)) b)
diff --git a/src/basic/stdio-util.h b/src/basic/stdio-util.h
new file mode 100644 (file)
index 0000000..b36e8a9
--- /dev/null
@@ -0,0 +1,78 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <printf.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <sys/types.h>
+
+#include "macro.h"
+
+#define xsprintf(buf, fmt, ...) \
+        assert_message_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf), "xsprintf: " #buf "[] must be big enough")
+
+
+#define VA_FORMAT_ADVANCE(format, ap)                                   \
+do {                                                                    \
+        int _argtypes[128];                                             \
+        size_t _i, _k;                                                  \
+        _k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \
+        assert(_k < ELEMENTSOF(_argtypes));                             \
+        for (_i = 0; _i < _k; _i++) {                                   \
+                if (_argtypes[_i] & PA_FLAG_PTR)  {                     \
+                        (void) va_arg(ap, void*);                       \
+                        continue;                                       \
+                }                                                       \
+                                                                        \
+                switch (_argtypes[_i]) {                                \
+                case PA_INT:                                            \
+                case PA_INT|PA_FLAG_SHORT:                              \
+                case PA_CHAR:                                           \
+                        (void) va_arg(ap, int);                         \
+                        break;                                          \
+                case PA_INT|PA_FLAG_LONG:                               \
+                        (void) va_arg(ap, long int);                    \
+                        break;                                          \
+                case PA_INT|PA_FLAG_LONG_LONG:                          \
+                        (void) va_arg(ap, long long int);               \
+                        break;                                          \
+                case PA_WCHAR:                                          \
+                        (void) va_arg(ap, wchar_t);                     \
+                        break;                                          \
+                case PA_WSTRING:                                        \
+                case PA_STRING:                                         \
+                case PA_POINTER:                                        \
+                        (void) va_arg(ap, void*);                       \
+                        break;                                          \
+                case PA_FLOAT:                                          \
+                case PA_DOUBLE:                                         \
+                        (void) va_arg(ap, double);                      \
+                        break;                                          \
+                case PA_DOUBLE|PA_FLAG_LONG_DOUBLE:                     \
+                        (void) va_arg(ap, long double);                 \
+                        break;                                          \
+                default:                                                \
+                        assert_not_reached("Unknown format string argument."); \
+                }                                                       \
+        }                                                               \
+} while(false)
diff --git a/src/basic/string-table.c b/src/basic/string-table.c
new file mode 100644 (file)
index 0000000..a860324
--- /dev/null
@@ -0,0 +1,35 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "string-table.h"
+
+ssize_t string_table_lookup(const char * const *table, size_t len, const char *key) {
+        size_t i;
+
+        if (!key)
+                return -1;
+
+        for (i = 0; i < len; ++i)
+                if (streq_ptr(table[i], key))
+                        return (ssize_t) i;
+
+        return -1;
+}
diff --git a/src/basic/string-table.h b/src/basic/string-table.h
new file mode 100644 (file)
index 0000000..51b6007
--- /dev/null
@@ -0,0 +1,88 @@
+
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "macro.h"
+#include "parse-util.h"
+#include "string-util.h"
+
+ssize_t string_table_lookup(const char * const *table, size_t len, const char *key);
+
+/* For basic lookup tables with strictly enumerated entries */
+#define _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope)          \
+        scope const char *name##_to_string(type i) {                    \
+                if (i < 0 || i >= (type) ELEMENTSOF(name##_table))      \
+                        return NULL;                                    \
+                return name##_table[i];                                 \
+        }
+
+#define _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope)        \
+        scope type name##_from_string(const char *s) {                  \
+                return (type) string_table_lookup(name##_table, ELEMENTSOF(name##_table), s); \
+        }
+
+#define _DEFINE_STRING_TABLE_LOOKUP(name,type,scope)                    \
+        _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,scope)          \
+        _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,scope)        \
+        struct __useless_struct_to_allow_trailing_semicolon__
+
+#define DEFINE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,)
+#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP(name,type) _DEFINE_STRING_TABLE_LOOKUP(name,type,static)
+#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_TO_STRING(name,type,static)
+#define DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(name,type) _DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(name,type,static)
+
+/* For string conversions where numbers are also acceptable */
+#define DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(name,type,max)         \
+        int name##_to_string_alloc(type i, char **str) {                \
+                char *s;                                                \
+                if (i < 0 || i > max)                                   \
+                        return -ERANGE;                                 \
+                if (i < (type) ELEMENTSOF(name##_table)) {              \
+                        s = strdup(name##_table[i]);                    \
+                        if (!s)                                         \
+                                return -ENOMEM;                         \
+                } else {                                                \
+                        if (asprintf(&s, "%i", i) < 0)                  \
+                                return -ENOMEM;                         \
+                }                                                       \
+                *str = s;                                               \
+                return 0;                                               \
+        }                                                               \
+        type name##_from_string(const char *s) {                        \
+                type i;                                                 \
+                unsigned u = 0;                                         \
+                if (!s)                                                 \
+                        return (type) -1;                               \
+                for (i = 0; i < (type) ELEMENTSOF(name##_table); i++)   \
+                        if (streq_ptr(name##_table[i], s))              \
+                                return i;                               \
+                if (safe_atou(s, &u) >= 0 && u <= max)                  \
+                        return (type) u;                                \
+                return (type) -1;                                       \
+        }                                                               \
+        struct __useless_struct_to_allow_trailing_semicolon__
diff --git a/src/basic/string-util.c b/src/basic/string-util.c
new file mode 100644 (file)
index 0000000..6006767
--- /dev/null
@@ -0,0 +1,800 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "alloc-util.h"
+#include "gunicode.h"
+#include "string-util.h"
+#include "utf8.h"
+#include "util.h"
+
+int strcmp_ptr(const char *a, const char *b) {
+
+        /* Like strcmp(), but tries to make sense of NULL pointers */
+        if (a && b)
+                return strcmp(a, b);
+
+        if (!a && b)
+                return -1;
+
+        if (a && !b)
+                return 1;
+
+        return 0;
+}
+
+char* endswith(const char *s, const char *postfix) {
+        size_t sl, pl;
+
+        assert(s);
+        assert(postfix);
+
+        sl = strlen(s);
+        pl = strlen(postfix);
+
+        if (pl == 0)
+                return (char*) s + sl;
+
+        if (sl < pl)
+                return NULL;
+
+        if (memcmp(s + sl - pl, postfix, pl) != 0)
+                return NULL;
+
+        return (char*) s + sl - pl;
+}
+
+char* endswith_no_case(const char *s, const char *postfix) {
+        size_t sl, pl;
+
+        assert(s);
+        assert(postfix);
+
+        sl = strlen(s);
+        pl = strlen(postfix);
+
+        if (pl == 0)
+                return (char*) s + sl;
+
+        if (sl < pl)
+                return NULL;
+
+        if (strcasecmp(s + sl - pl, postfix) != 0)
+                return NULL;
+
+        return (char*) s + sl - pl;
+}
+
+char* first_word(const char *s, const char *word) {
+        size_t sl, wl;
+        const char *p;
+
+        assert(s);
+        assert(word);
+
+        /* Checks if the string starts with the specified word, either
+         * followed by NUL or by whitespace. Returns a pointer to the
+         * NUL or the first character after the whitespace. */
+
+        sl = strlen(s);
+        wl = strlen(word);
+
+        if (sl < wl)
+                return NULL;
+
+        if (wl == 0)
+                return (char*) s;
+
+        if (memcmp(s, word, wl) != 0)
+                return NULL;
+
+        p = s + wl;
+        if (*p == 0)
+                return (char*) p;
+
+        if (!strchr(WHITESPACE, *p))
+                return NULL;
+
+        p += strspn(p, WHITESPACE);
+        return (char*) p;
+}
+
+static size_t strcspn_escaped(const char *s, const char *reject) {
+        bool escaped = false;
+        int n;
+
+        for (n=0; s[n]; n++) {
+                if (escaped)
+                        escaped = false;
+                else if (s[n] == '\\')
+                        escaped = true;
+                else if (strchr(reject, s[n]))
+                        break;
+        }
+
+        /* if s ends in \, return index of previous char */
+        return n - escaped;
+}
+
+/* Split a string into words. */
+const char* split(const char **state, size_t *l, const char *separator, bool quoted) {
+        const char *current;
+
+        current = *state;
+
+        if (!*current) {
+                assert(**state == '\0');
+                return NULL;
+        }
+
+        current += strspn(current, separator);
+        if (!*current) {
+                *state = current;
+                return NULL;
+        }
+
+        if (quoted && strchr("\'\"", *current)) {
+                char quotechars[2] = {*current, '\0'};
+
+                *l = strcspn_escaped(current + 1, quotechars);
+                if (current[*l + 1] == '\0' || current[*l + 1] != quotechars[0] ||
+                    (current[*l + 2] && !strchr(separator, current[*l + 2]))) {
+                        /* right quote missing or garbage at the end */
+                        *state = current;
+                        return NULL;
+                }
+                *state = current++ + *l + 2;
+        } else if (quoted) {
+                *l = strcspn_escaped(current, separator);
+                if (current[*l] && !strchr(separator, current[*l])) {
+                        /* unfinished escape */
+                        *state = current;
+                        return NULL;
+                }
+                *state = current + *l;
+        } else {
+                *l = strcspn(current, separator);
+                *state = current + *l;
+        }
+
+        return current;
+}
+
+char *strnappend(const char *s, const char *suffix, size_t b) {
+        size_t a;
+        char *r;
+
+        if (!s && !suffix)
+                return strdup("");
+
+        if (!s)
+                return strndup(suffix, b);
+
+        if (!suffix)
+                return strdup(s);
+
+        assert(s);
+        assert(suffix);
+
+        a = strlen(s);
+        if (b > ((size_t) -1) - a)
+                return NULL;
+
+        r = new(char, a+b+1);
+        if (!r)
+                return NULL;
+
+        memcpy(r, s, a);
+        memcpy(r+a, suffix, b);
+        r[a+b] = 0;
+
+        return r;
+}
+
+char *strappend(const char *s, const char *suffix) {
+        return strnappend(s, suffix, suffix ? strlen(suffix) : 0);
+}
+
+char *strjoin(const char *x, ...) {
+        va_list ap;
+        size_t l;
+        char *r, *p;
+
+        va_start(ap, x);
+
+        if (x) {
+                l = strlen(x);
+
+                for (;;) {
+                        const char *t;
+                        size_t n;
+
+                        t = va_arg(ap, const char *);
+                        if (!t)
+                                break;
+
+                        n = strlen(t);
+                        if (n > ((size_t) -1) - l) {
+                                va_end(ap);
+                                return NULL;
+                        }
+
+                        l += n;
+                }
+        } else
+                l = 0;
+
+        va_end(ap);
+
+        r = new(char, l+1);
+        if (!r)
+                return NULL;
+
+        if (x) {
+                p = stpcpy(r, x);
+
+                va_start(ap, x);
+
+                for (;;) {
+                        const char *t;
+
+                        t = va_arg(ap, const char *);
+                        if (!t)
+                                break;
+
+                        p = stpcpy(p, t);
+                }
+
+                va_end(ap);
+        } else
+                r[0] = 0;
+
+        return r;
+}
+
+char *strstrip(char *s) {
+        char *e;
+
+        /* Drops trailing whitespace. Modifies the string in
+         * place. Returns pointer to first non-space character */
+
+        s += strspn(s, WHITESPACE);
+
+        for (e = strchr(s, 0); e > s; e --)
+                if (!strchr(WHITESPACE, e[-1]))
+                        break;
+
+        *e = 0;
+
+        return s;
+}
+
+char *delete_chars(char *s, const char *bad) {
+        char *f, *t;
+
+        /* Drops all whitespace, regardless where in the string */
+
+        for (f = s, t = s; *f; f++) {
+                if (strchr(bad, *f))
+                        continue;
+
+                *(t++) = *f;
+        }
+
+        *t = 0;
+
+        return s;
+}
+
+char *truncate_nl(char *s) {
+        assert(s);
+
+        s[strcspn(s, NEWLINE)] = 0;
+        return s;
+}
+
+char *ascii_strlower(char *t) {
+        char *p;
+
+        assert(t);
+
+        for (p = t; *p; p++)
+                if (*p >= 'A' && *p <= 'Z')
+                        *p = *p - 'A' + 'a';
+
+        return t;
+}
+
+bool chars_intersect(const char *a, const char *b) {
+        const char *p;
+
+        /* Returns true if any of the chars in a are in b. */
+        for (p = a; *p; p++)
+                if (strchr(b, *p))
+                        return true;
+
+        return false;
+}
+
+bool string_has_cc(const char *p, const char *ok) {
+        const char *t;
+
+        assert(p);
+
+        /*
+         * Check if a string contains control characters. If 'ok' is
+         * non-NULL it may be a string containing additional CCs to be
+         * considered OK.
+         */
+
+        for (t = p; *t; t++) {
+                if (ok && strchr(ok, *t))
+                        continue;
+
+                if (*t > 0 && *t < ' ')
+                        return true;
+
+                if (*t == 127)
+                        return true;
+        }
+
+        return false;
+}
+
+static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) {
+        size_t x;
+        char *r;
+
+        assert(s);
+        assert(percent <= 100);
+        assert(new_length >= 3);
+
+        if (old_length <= 3 || old_length <= new_length)
+                return strndup(s, old_length);
+
+        r = new0(char, new_length+1);
+        if (!r)
+                return NULL;
+
+        x = (new_length * percent) / 100;
+
+        if (x > new_length - 3)
+                x = new_length - 3;
+
+        memcpy(r, s, x);
+        r[x] = '.';
+        r[x+1] = '.';
+        r[x+2] = '.';
+        memcpy(r + x + 3,
+               s + old_length - (new_length - x - 3),
+               new_length - x - 3);
+
+        return r;
+}
+
+char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) {
+        size_t x;
+        char *e;
+        const char *i, *j;
+        unsigned k, len, len2;
+
+        assert(s);
+        assert(percent <= 100);
+        assert(new_length >= 3);
+
+        /* if no multibyte characters use ascii_ellipsize_mem for speed */
+        if (ascii_is_valid(s))
+                return ascii_ellipsize_mem(s, old_length, new_length, percent);
+
+        if (old_length <= 3 || old_length <= new_length)
+                return strndup(s, old_length);
+
+        x = (new_length * percent) / 100;
+
+        if (x > new_length - 3)
+                x = new_length - 3;
+
+        k = 0;
+        for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) {
+                int c;
+
+                c = utf8_encoded_to_unichar(i);
+                if (c < 0)
+                        return NULL;
+                k += unichar_iswide(c) ? 2 : 1;
+        }
+
+        if (k > x) /* last character was wide and went over quota */
+                x ++;
+
+        for (j = s + old_length; k < new_length && j > i; ) {
+                int c;
+
+                j = utf8_prev_char(j);
+                c = utf8_encoded_to_unichar(j);
+                if (c < 0)
+                        return NULL;
+                k += unichar_iswide(c) ? 2 : 1;
+        }
+        assert(i <= j);
+
+        /* we don't actually need to ellipsize */
+        if (i == j)
+                return memdup(s, old_length + 1);
+
+        /* make space for ellipsis */
+        j = utf8_next_char(j);
+
+        len = i - s;
+        len2 = s + old_length - j;
+        e = new(char, len + 3 + len2 + 1);
+        if (!e)
+                return NULL;
+
+        /*
+        printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n",
+               old_length, new_length, x, len, len2, k);
+        */
+
+        memcpy(e, s, len);
+        e[len]   = 0xe2; /* tri-dot ellipsis: … */
+        e[len + 1] = 0x80;
+        e[len + 2] = 0xa6;
+
+        memcpy(e + len + 3, j, len2 + 1);
+
+        return e;
+}
+
+char *ellipsize(const char *s, size_t length, unsigned percent) {
+        return ellipsize_mem(s, strlen(s), length, percent);
+}
+
+bool nulstr_contains(const char*nulstr, const char *needle) {
+        const char *i;
+
+        if (!nulstr)
+                return false;
+
+        NULSTR_FOREACH(i, nulstr)
+                if (streq(i, needle))
+                        return true;
+
+        return false;
+}
+
+char* strshorten(char *s, size_t l) {
+        assert(s);
+
+        if (l < strlen(s))
+                s[l] = 0;
+
+        return s;
+}
+
+char *strreplace(const char *text, const char *old_string, const char *new_string) {
+        const char *f;
+        char *t, *r;
+        size_t l, old_len, new_len;
+
+        assert(text);
+        assert(old_string);
+        assert(new_string);
+
+        old_len = strlen(old_string);
+        new_len = strlen(new_string);
+
+        l = strlen(text);
+        r = new(char, l+1);
+        if (!r)
+                return NULL;
+
+        f = text;
+        t = r;
+        while (*f) {
+                char *a;
+                size_t d, nl;
+
+                if (!startswith(f, old_string)) {
+                        *(t++) = *(f++);
+                        continue;
+                }
+
+                d = t - r;
+                nl = l - old_len + new_len;
+                a = realloc(r, nl + 1);
+                if (!a)
+                        goto oom;
+
+                l = nl;
+                r = a;
+                t = r + d;
+
+                t = stpcpy(t, new_string);
+                f += old_len;
+        }
+
+        *t = 0;
+        return r;
+
+oom:
+        free(r);
+        return NULL;
+}
+
+char *strip_tab_ansi(char **ibuf, size_t *_isz) {
+        const char *i, *begin = NULL;
+        enum {
+                STATE_OTHER,
+                STATE_ESCAPE,
+                STATE_BRACKET
+        } state = STATE_OTHER;
+        char *obuf = NULL;
+        size_t osz = 0, isz;
+        FILE *f;
+
+        assert(ibuf);
+        assert(*ibuf);
+
+        /* Strips ANSI color and replaces TABs by 8 spaces */
+
+        isz = _isz ? *_isz : strlen(*ibuf);
+
+        f = open_memstream(&obuf, &osz);
+        if (!f)
+                return NULL;
+
+        for (i = *ibuf; i < *ibuf + isz + 1; i++) {
+
+                switch (state) {
+
+                case STATE_OTHER:
+                        if (i >= *ibuf + isz) /* EOT */
+                                break;
+                        else if (*i == '\x1B')
+                                state = STATE_ESCAPE;
+                        else if (*i == '\t')
+                                fputs("        ", f);
+                        else
+                                fputc(*i, f);
+                        break;
+
+                case STATE_ESCAPE:
+                        if (i >= *ibuf + isz) { /* EOT */
+                                fputc('\x1B', f);
+                                break;
+                        } else if (*i == '[') {
+                                state = STATE_BRACKET;
+                                begin = i + 1;
+                        } else {
+                                fputc('\x1B', f);
+                                fputc(*i, f);
+                                state = STATE_OTHER;
+                        }
+
+                        break;
+
+                case STATE_BRACKET:
+
+                        if (i >= *ibuf + isz || /* EOT */
+                            (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) {
+                                fputc('\x1B', f);
+                                fputc('[', f);
+                                state = STATE_OTHER;
+                                i = begin-1;
+                        } else if (*i == 'm')
+                                state = STATE_OTHER;
+                        break;
+                }
+        }
+
+        if (ferror(f)) {
+                fclose(f);
+                free(obuf);
+                return NULL;
+        }
+
+        fclose(f);
+
+        free(*ibuf);
+        *ibuf = obuf;
+
+        if (_isz)
+                *_isz = osz;
+
+        return obuf;
+}
+
+char *strextend(char **x, ...) {
+        va_list ap;
+        size_t f, l;
+        char *r, *p;
+
+        assert(x);
+
+        l = f = *x ? strlen(*x) : 0;
+
+        va_start(ap, x);
+        for (;;) {
+                const char *t;
+                size_t n;
+
+                t = va_arg(ap, const char *);
+                if (!t)
+                        break;
+
+                n = strlen(t);
+                if (n > ((size_t) -1) - l) {
+                        va_end(ap);
+                        return NULL;
+                }
+
+                l += n;
+        }
+        va_end(ap);
+
+        r = realloc(*x, l+1);
+        if (!r)
+                return NULL;
+
+        p = r + f;
+
+        va_start(ap, x);
+        for (;;) {
+                const char *t;
+
+                t = va_arg(ap, const char *);
+                if (!t)
+                        break;
+
+                p = stpcpy(p, t);
+        }
+        va_end(ap);
+
+        *p = 0;
+        *x = r;
+
+        return r + l;
+}
+
+char *strrep(const char *s, unsigned n) {
+        size_t l;
+        char *r, *p;
+        unsigned i;
+
+        assert(s);
+
+        l = strlen(s);
+        p = r = malloc(l * n + 1);
+        if (!r)
+                return NULL;
+
+        for (i = 0; i < n; i++)
+                p = stpcpy(p, s);
+
+        *p = 0;
+        return r;
+}
+
+int split_pair(const char *s, const char *sep, char **l, char **r) {
+        char *x, *a, *b;
+
+        assert(s);
+        assert(sep);
+        assert(l);
+        assert(r);
+
+        if (isempty(sep))
+                return -EINVAL;
+
+        x = strstr(s, sep);
+        if (!x)
+                return -EINVAL;
+
+        a = strndup(s, x - s);
+        if (!a)
+                return -ENOMEM;
+
+        b = strdup(x + strlen(sep));
+        if (!b) {
+                free(a);
+                return -ENOMEM;
+        }
+
+        *l = a;
+        *r = b;
+
+        return 0;
+}
+
+int free_and_strdup(char **p, const char *s) {
+        char *t;
+
+        assert(p);
+
+        /* Replaces a string pointer with an strdup()ed new string,
+         * possibly freeing the old one. */
+
+        if (streq_ptr(*p, s))
+                return 0;
+
+        if (s) {
+                t = strdup(s);
+                if (!t)
+                        return -ENOMEM;
+        } else
+                t = NULL;
+
+        free(*p);
+        *p = t;
+
+        return 1;
+}
+
+#pragma GCC push_options
+#pragma GCC optimize("O0")
+
+void* memory_erase(void *p, size_t l) {
+        volatile uint8_t* x = (volatile uint8_t*) p;
+
+        /* This basically does what memset() does, but hopefully isn't
+         * optimized away by the compiler. One of those days, when
+         * glibc learns memset_s() we should replace this call by
+         * memset_s(), but until then this has to do. */
+
+        for (; l > 0; l--)
+                *(x++) = 'x';
+
+        return p;
+}
+
+#pragma GCC pop_options
+
+char* string_erase(char *x) {
+
+        if (!x)
+                return NULL;
+
+        /* A delicious drop of snake-oil! To be called on memory where
+         * we stored passphrases or so, after we used them. */
+
+        return memory_erase(x, strlen(x));
+}
+
+char *string_free_erase(char *s) {
+        return mfree(string_erase(s));
+}
+
+bool string_is_safe(const char *p) {
+        const char *t;
+
+        if (!p)
+                return false;
+
+        for (t = p; *t; t++) {
+                if (*t > 0 && *t < ' ') /* no control characters */
+                        return false;
+
+                if (strchr(QUOTES "\\\x7f", *t))
+                        return false;
+        }
+
+        return true;
+}
diff --git a/src/basic/string-util.h b/src/basic/string-util.h
new file mode 100644 (file)
index 0000000..54f9d30
--- /dev/null
@@ -0,0 +1,184 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+#include <string.h>
+
+#include "macro.h"
+
+/* What is interpreted as whitespace? */
+#define WHITESPACE        " \t\n\r"
+#define NEWLINE           "\n\r"
+#define QUOTES            "\"\'"
+#define COMMENTS          "#;"
+#define GLOB_CHARS        "*?["
+#define DIGITS            "0123456789"
+#define LOWERCASE_LETTERS "abcdefghijklmnopqrstuvwxyz"
+#define UPPERCASE_LETTERS "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+#define LETTERS           LOWERCASE_LETTERS UPPERCASE_LETTERS
+#define ALPHANUMERICAL    LETTERS DIGITS
+
+#define streq(a,b) (strcmp((a),(b)) == 0)
+#define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
+#define strcaseeq(a,b) (strcasecmp((a),(b)) == 0)
+#define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
+
+int strcmp_ptr(const char *a, const char *b) _pure_;
+
+static inline bool streq_ptr(const char *a, const char *b) {
+        return strcmp_ptr(a, b) == 0;
+}
+
+static inline const char* strempty(const char *s) {
+        return s ? s : "";
+}
+
+static inline const char* strnull(const char *s) {
+        return s ? s : "(null)";
+}
+
+static inline const char *strna(const char *s) {
+        return s ? s : "n/a";
+}
+
+static inline bool isempty(const char *p) {
+        return !p || !p[0];
+}
+
+static inline char *startswith(const char *s, const char *prefix) {
+        size_t l;
+
+        l = strlen(prefix);
+        if (strncmp(s, prefix, l) == 0)
+                return (char*) s + l;
+
+        return NULL;
+}
+
+static inline char *startswith_no_case(const char *s, const char *prefix) {
+        size_t l;
+
+        l = strlen(prefix);
+        if (strncasecmp(s, prefix, l) == 0)
+                return (char*) s + l;
+
+        return NULL;
+}
+
+char *endswith(const char *s, const char *postfix) _pure_;
+char *endswith_no_case(const char *s, const char *postfix) _pure_;
+
+char *first_word(const char *s, const char *word) _pure_;
+
+const char* split(const char **state, size_t *l, const char *separator, bool quoted);
+
+#define FOREACH_WORD(word, length, s, state)                            \
+        _FOREACH_WORD(word, length, s, WHITESPACE, false, state)
+
+#define FOREACH_WORD_SEPARATOR(word, length, s, separator, state)       \
+        _FOREACH_WORD(word, length, s, separator, false, state)
+
+#define FOREACH_WORD_QUOTED(word, length, s, state)                     \
+        _FOREACH_WORD(word, length, s, WHITESPACE, true, state)
+
+#define _FOREACH_WORD(word, length, s, separator, quoted, state)        \
+        for ((state) = (s), (word) = split(&(state), &(length), (separator), (quoted)); (word); (word) = split(&(state), &(length), (separator), (quoted)))
+
+char *strappend(const char *s, const char *suffix);
+char *strnappend(const char *s, const char *suffix, size_t length);
+
+char *strjoin(const char *x, ...) _sentinel_;
+
+#define strjoina(a, ...)                                                \
+        ({                                                              \
+                const char *_appendees_[] = { a, __VA_ARGS__ };         \
+                char *_d_, *_p_;                                        \
+                int _len_ = 0;                                          \
+                unsigned _i_;                                           \
+                for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
+                        _len_ += strlen(_appendees_[_i_]);              \
+                _p_ = _d_ = alloca(_len_ + 1);                          \
+                for (_i_ = 0; _i_ < ELEMENTSOF(_appendees_) && _appendees_[_i_]; _i_++) \
+                        _p_ = stpcpy(_p_, _appendees_[_i_]);            \
+                *_p_ = 0;                                               \
+                _d_;                                                    \
+        })
+
+char *strstrip(char *s);
+char *delete_chars(char *s, const char *bad);
+char *truncate_nl(char *s);
+
+char *ascii_strlower(char *path);
+
+bool chars_intersect(const char *a, const char *b) _pure_;
+
+static inline bool _pure_ in_charset(const char *s, const char* charset) {
+        assert(s);
+        assert(charset);
+        return s[strspn(s, charset)] == '\0';
+}
+
+bool string_has_cc(const char *p, const char *ok) _pure_;
+
+char *ellipsize_mem(const char *s, size_t old_length_bytes, size_t new_length_columns, unsigned percent);
+char *ellipsize(const char *s, size_t length, unsigned percent);
+
+bool nulstr_contains(const char*nulstr, const char *needle);
+
+char* strshorten(char *s, size_t l);
+
+char *strreplace(const char *text, const char *old_string, const char *new_string);
+
+char *strip_tab_ansi(char **p, size_t *l);
+
+char *strextend(char **x, ...) _sentinel_;
+
+char *strrep(const char *s, unsigned n);
+
+int split_pair(const char *s, const char *sep, char **l, char **r);
+
+int free_and_strdup(char **p, const char *s);
+
+/* Normal memmem() requires haystack to be nonnull, which is annoying for zero-length buffers */
+static inline void *memmem_safe(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen) {
+
+        if (needlelen <= 0)
+                return (void*) haystack;
+
+        if (haystacklen < needlelen)
+                return NULL;
+
+        assert(haystack);
+        assert(needle);
+
+        return memmem(haystack, haystacklen, needle, needlelen);
+}
+
+void* memory_erase(void *p, size_t l);
+char *string_erase(char *x);
+
+char *string_free_erase(char *s);
+DEFINE_TRIVIAL_CLEANUP_FUNC(char *, string_free_erase);
+#define _cleanup_string_free_erase_ _cleanup_(string_free_erasep)
+
+bool string_is_safe(const char *p) _pure_;
diff --git a/src/basic/syslog-util.c b/src/basic/syslog-util.c
new file mode 100644 (file)
index 0000000..854401a
--- /dev/null
@@ -0,0 +1,124 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <syslog.h>
+
+#include "assert.h"
+#include "hexdecoct.h"
+#include "string-table.h"
+#include "syslog-util.h"
+
+/// UNNEEDED by elogind
+#if 0
+int syslog_parse_priority(const char **p, int *priority, bool with_facility) {
+        int a = 0, b = 0, c = 0;
+        int k;
+
+        assert(p);
+        assert(*p);
+        assert(priority);
+
+        if ((*p)[0] != '<')
+                return 0;
+
+        if (!strchr(*p, '>'))
+                return 0;
+
+        if ((*p)[2] == '>') {
+                c = undecchar((*p)[1]);
+                k = 3;
+        } else if ((*p)[3] == '>') {
+                b = undecchar((*p)[1]);
+                c = undecchar((*p)[2]);
+                k = 4;
+        } else if ((*p)[4] == '>') {
+                a = undecchar((*p)[1]);
+                b = undecchar((*p)[2]);
+                c = undecchar((*p)[3]);
+                k = 5;
+        } else
+                return 0;
+
+        if (a < 0 || b < 0 || c < 0 ||
+            (!with_facility && (a || b || c > 7)))
+                return 0;
+
+        if (with_facility)
+                *priority = a*100 + b*10 + c;
+        else
+                *priority = (*priority & LOG_FACMASK) | c;
+
+        *p += k;
+        return 1;
+}
+#endif // 0
+
+static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = {
+        [LOG_FAC(LOG_KERN)] = "kern",
+        [LOG_FAC(LOG_USER)] = "user",
+        [LOG_FAC(LOG_MAIL)] = "mail",
+        [LOG_FAC(LOG_DAEMON)] = "daemon",
+        [LOG_FAC(LOG_AUTH)] = "auth",
+        [LOG_FAC(LOG_SYSLOG)] = "syslog",
+        [LOG_FAC(LOG_LPR)] = "lpr",
+        [LOG_FAC(LOG_NEWS)] = "news",
+        [LOG_FAC(LOG_UUCP)] = "uucp",
+        [LOG_FAC(LOG_CRON)] = "cron",
+        [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
+        [LOG_FAC(LOG_FTP)] = "ftp",
+        [LOG_FAC(LOG_LOCAL0)] = "local0",
+        [LOG_FAC(LOG_LOCAL1)] = "local1",
+        [LOG_FAC(LOG_LOCAL2)] = "local2",
+        [LOG_FAC(LOG_LOCAL3)] = "local3",
+        [LOG_FAC(LOG_LOCAL4)] = "local4",
+        [LOG_FAC(LOG_LOCAL5)] = "local5",
+        [LOG_FAC(LOG_LOCAL6)] = "local6",
+        [LOG_FAC(LOG_LOCAL7)] = "local7"
+};
+
+DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0));
+
+/// UNNEEDED by elogind
+#if 0
+bool log_facility_unshifted_is_valid(int facility) {
+        return facility >= 0 && facility <= LOG_FAC(~0);
+}
+#endif // 0
+
+static const char *const log_level_table[] = {
+        [LOG_EMERG] = "emerg",
+        [LOG_ALERT] = "alert",
+        [LOG_CRIT] = "crit",
+        [LOG_ERR] = "err",
+        [LOG_WARNING] = "warning",
+        [LOG_NOTICE] = "notice",
+        [LOG_INFO] = "info",
+        [LOG_DEBUG] = "debug"
+};
+
+DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG);
+
+/// UNNEEDED by elogind
+#if 0
+bool log_level_is_valid(int level) {
+        return level >= 0 && level <= LOG_DEBUG;
+}
+#endif // 0
diff --git a/src/basic/syslog-util.h b/src/basic/syslog-util.h
new file mode 100644 (file)
index 0000000..74912af
--- /dev/null
@@ -0,0 +1,34 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+
+int log_facility_unshifted_to_string_alloc(int i, char **s);
+int log_facility_unshifted_from_string(const char *s);
+// UNNEEDED bool log_facility_unshifted_is_valid(int faciliy);
+
+int log_level_to_string_alloc(int i, char **s);
+int log_level_from_string(const char *s);
+// UNNEEDED bool log_level_is_valid(int level);
+
+// UNNEEDED int syslog_parse_priority(const char **p, int *priority, bool with_facility);
diff --git a/src/basic/umask-util.h b/src/basic/umask-util.h
new file mode 100644 (file)
index 0000000..8ed3465
--- /dev/null
@@ -0,0 +1,48 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdbool.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include "macro.h"
+
+static inline void umaskp(mode_t *u) {
+        umask(*u);
+}
+
+#define _cleanup_umask_ _cleanup_(umaskp)
+
+struct _umask_struct_ {
+        mode_t mask;
+        bool quit;
+};
+
+static inline void _reset_umask_(struct _umask_struct_ *s) {
+        umask(s->mask);
+};
+
+#define RUN_WITH_UMASK(mask)                                            \
+        for (_cleanup_(_reset_umask_) struct _umask_struct_ _saved_umask_ = { umask(mask), false }; \
+             !_saved_umask_.quit ;                                      \
+             _saved_umask_.quit = true)
diff --git a/src/basic/user-util.c b/src/basic/user-util.c
new file mode 100644 (file)
index 0000000..397880b
--- /dev/null
@@ -0,0 +1,472 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <grp.h>
+#include <pwd.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "macro.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "string-util.h"
+#include "user-util.h"
+#include "util.h"
+
+bool uid_is_valid(uid_t uid) {
+
+        /* Some libc APIs use UID_INVALID as special placeholder */
+        if (uid == (uid_t) UINT32_C(0xFFFFFFFF))
+                return false;
+
+        /* A long time ago UIDs where 16bit, hence explicitly avoid the 16bit -1 too */
+        if (uid == (uid_t) UINT32_C(0xFFFF))
+                return false;
+
+        return true;
+}
+
+int parse_uid(const char *s, uid_t *ret) {
+        uint32_t uid = 0;
+        int r;
+
+        assert(s);
+
+        assert_cc(sizeof(uid_t) == sizeof(uint32_t));
+        r = safe_atou32(s, &uid);
+        if (r < 0)
+                return r;
+
+        if (!uid_is_valid(uid))
+                return -ENXIO; /* we return ENXIO instead of EINVAL
+                                * here, to make it easy to distuingish
+                                * invalid numeric uids invalid
+                                * strings. */
+
+        if (ret)
+                *ret = uid;
+
+        return 0;
+}
+
+char* getlogname_malloc(void) {
+        uid_t uid;
+        struct stat st;
+
+        if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
+                uid = st.st_uid;
+        else
+                uid = getuid();
+
+        return uid_to_name(uid);
+}
+
+char *getusername_malloc(void) {
+        const char *e;
+
+        e = getenv("USER");
+        if (e)
+                return strdup(e);
+
+        return uid_to_name(getuid());
+}
+
+int get_user_creds(
+                const char **username,
+                uid_t *uid, gid_t *gid,
+                const char **home,
+                const char **shell) {
+
+        struct passwd *p;
+        uid_t u;
+
+        assert(username);
+        assert(*username);
+
+        /* We enforce some special rules for uid=0: in order to avoid
+         * NSS lookups for root we hardcode its data. */
+
+        if (streq(*username, "root") || streq(*username, "0")) {
+                *username = "root";
+
+                if (uid)
+                        *uid = 0;
+
+                if (gid)
+                        *gid = 0;
+
+                if (home)
+                        *home = "/root";
+
+                if (shell)
+                        *shell = "/bin/sh";
+
+                return 0;
+        }
+
+        if (parse_uid(*username, &u) >= 0) {
+                errno = 0;
+                p = getpwuid(u);
+
+                /* If there are multiple users with the same id, make
+                 * sure to leave $USER to the configured value instead
+                 * of the first occurrence in the database. However if
+                 * the uid was configured by a numeric uid, then let's
+                 * pick the real username from /etc/passwd. */
+                if (p)
+                        *username = p->pw_name;
+        } else {
+                errno = 0;
+                p = getpwnam(*username);
+        }
+
+        if (!p)
+                return errno > 0 ? -errno : -ESRCH;
+
+        if (uid) {
+                if (!uid_is_valid(p->pw_uid))
+                        return -EBADMSG;
+
+                *uid = p->pw_uid;
+        }
+
+        if (gid) {
+                if (!gid_is_valid(p->pw_gid))
+                        return -EBADMSG;
+
+                *gid = p->pw_gid;
+        }
+
+        if (home)
+                *home = p->pw_dir;
+
+        if (shell)
+                *shell = p->pw_shell;
+
+        return 0;
+}
+
+int get_group_creds(const char **groupname, gid_t *gid) {
+        struct group *g;
+        gid_t id;
+
+        assert(groupname);
+
+        /* We enforce some special rules for gid=0: in order to avoid
+         * NSS lookups for root we hardcode its data. */
+
+        if (streq(*groupname, "root") || streq(*groupname, "0")) {
+                *groupname = "root";
+
+                if (gid)
+                        *gid = 0;
+
+                return 0;
+        }
+
+        if (parse_gid(*groupname, &id) >= 0) {
+                errno = 0;
+                g = getgrgid(id);
+
+                if (g)
+                        *groupname = g->gr_name;
+        } else {
+                errno = 0;
+                g = getgrnam(*groupname);
+        }
+
+        if (!g)
+                return errno > 0 ? -errno : -ESRCH;
+
+        if (gid) {
+                if (!gid_is_valid(g->gr_gid))
+                        return -EBADMSG;
+
+                *gid = g->gr_gid;
+        }
+
+        return 0;
+}
+
+char* uid_to_name(uid_t uid) {
+        char *ret;
+        int r;
+
+        /* Shortcut things to avoid NSS lookups */
+        if (uid == 0)
+                return strdup("root");
+
+        if (uid_is_valid(uid)) {
+                long bufsize;
+
+                bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
+                if (bufsize <= 0)
+                        bufsize = 4096;
+
+                for (;;) {
+                        struct passwd pwbuf, *pw = NULL;
+                        _cleanup_free_ char *buf = NULL;
+
+                        buf = malloc(bufsize);
+                        if (!buf)
+                                return NULL;
+
+                        r = getpwuid_r(uid, &pwbuf, buf, (size_t) bufsize, &pw);
+                        if (r == 0 && pw)
+                                return strdup(pw->pw_name);
+                        if (r != ERANGE)
+                                break;