X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fshared%2Futil.c;h=1994c7e05d0923036bb51de3796986dd78597f79;hb=012d7b4217420163db5752a63da6cab39d25edf3;hp=c53f9cdb6acb1c3cd055bd7698d18b03a97c7082;hpb=63c372cb9df3bee01e3bf8cd7f96f336bddda846;p=elogind.git

diff --git a/src/shared/util.c b/src/shared/util.c
index c53f9cdb6..1994c7e05 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -19,12 +19,13 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <assert.h>
 #include <string.h>
 #include <unistd.h>
 #include <errno.h>
 #include <stdlib.h>
 #include <signal.h>
+#include <libintl.h>
+#include <locale.h>
 #include <stdio.h>
 #include <syslog.h>
 #include <sched.h>
@@ -39,14 +40,13 @@
 #include <linux/tiocl.h>
 #include <termios.h>
 #include <stdarg.h>
-#include <sys/poll.h>
+#include <poll.h>
 #include <ctype.h>
 #include <sys/prctl.h>
 #include <sys/utsname.h>
 #include <pwd.h>
 #include <netinet/ip.h>
 #include <linux/kd.h>
-#include <dlfcn.h>
 #include <sys/wait.h>
 #include <sys/time.h>
 #include <glob.h>
@@ -60,23 +60,27 @@
 #include <locale.h>
 #include <sys/personality.h>
 #include <sys/xattr.h>
-#include <libgen.h>
 #include <sys/statvfs.h>
 #include <sys/file.h>
 #include <linux/fs.h>
+
+/* When we include libgen.h because we need dirname() we immediately
+ * undefine basename() since libgen.h defines it as a macro to the XDG
+ * version which is really broken. */
+#include <libgen.h>
 #undef basename
 
 #ifdef HAVE_SYS_AUXV_H
 #include <sys/auxv.h>
 #endif
 
+#include "config.h"
 #include "macro.h"
 #include "util.h"
 #include "ioprio.h"
 #include "missing.h"
 #include "log.h"
 #include "strv.h"
-#include "label.h"
 #include "mkdir.h"
 #include "path-util.h"
 #include "exit-status.h"
@@ -90,6 +94,9 @@
 #include "def.h"
 #include "sparse-endian.h"
 
+/* Put this test here for a lack of better place */
+assert_cc(EAGAIN == EWOULDBLOCK);
+
 int saved_argc = 0;
 char **saved_argv = NULL;
 
@@ -1685,6 +1692,7 @@ bool chars_intersect(const char *a, const char *b) {
 
 bool fstype_is_network(const char *fstype) {
         static const char table[] =
+                "afs\0"
                 "cifs\0"
                 "smbfs\0"
                 "sshfs\0"
@@ -2321,6 +2329,17 @@ ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) {
         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 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;
 
@@ -2575,8 +2594,9 @@ char* dirname_malloc(const char *path) {
 
 int dev_urandom(void *p, size_t n) {
         static int have_syscall = -1;
-        int r, fd;
-        ssize_t k;
+
+        _cleanup_close_ int fd = -1;
+        int r;
 
         /* Gathers some randomness from the kernel. This call will
          * never block, and will always return some data from the
@@ -2611,22 +2631,14 @@ int dev_urandom(void *p, size_t n) {
                                 return -errno;
                 } else
                         /* too short read? */
-                        return -EIO;
+                        return -ENODATA;
         }
 
         fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY);
         if (fd < 0)
                 return errno == ENOENT ? -ENOSYS : -errno;
 
-        k = loop_read(fd, p, n, true);
-        safe_close(fd);
-
-        if (k < 0)
-                return (int) k;
-        if ((size_t) k != n)
-                return -EIO;
-
-        return 0;
+        return loop_read_exact(fd, p, n, true);
 }
 
 void initialize_srand(void) {
@@ -5778,6 +5790,11 @@ void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
         return NULL;
 }
 
+void init_gettext(void) {
+        setlocale(LC_ALL, "");
+        textdomain(GETTEXT_PACKAGE);
+}
+
 bool is_locale_utf8(void) {
         const char *set;
         static int cached_answer = -1;
@@ -5989,7 +6006,7 @@ int on_ac_power(void) {
 
         d = opendir("/sys/class/power_supply");
         if (!d)
-                return -errno;
+                return errno == ENOENT ? true : -errno;
 
         for (;;) {
                 struct dirent *de;
@@ -6654,7 +6671,7 @@ int getpeersec(int fd, char **ret) {
 
         if (isempty(s)) {
                 free(s);
-                return -ENOTSUP;
+                return -EOPNOTSUPP;
         }
 
         *ret = s;
@@ -8085,3 +8102,67 @@ int syslog_parse_priority(const char **p, int *priority, bool with_facility) {
         *p += k;
         return 1;
 }
+
+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;
+}
+
+void cmsg_close_all(struct msghdr *mh) {
+        struct cmsghdr *cmsg;
+
+        assert(mh);
+
+        for (cmsg = CMSG_FIRSTHDR(mh); cmsg; cmsg = CMSG_NXTHDR(mh, cmsg))
+                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));
+}
+
+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;
+
+        /* Even though renameat2() exists since Linux 3.15, btrfs added
+         * support for it later. If it is not implemented, fallback to another
+         * method. */
+        if (errno != EINVAL)
+                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;
+}