chiark / gitweb /
Prep v228: Add remaining updates from upstream (2/3)
[elogind.git] / src / basic / util.c
index 1b0f216..1512adc 100644 (file)
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-//#include <ctype.h>
-//#include <dirent.h>
-//#include <errno.h>
-//#include <fcntl.h>
-//#include <glob.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
 #include <grp.h>
 #include <langinfo.h>
 #include <grp.h>
 #include <langinfo.h>
-//#include <libintl.h>
-//#include <limits.h>
+#include <libintl.h>
+#include <limits.h>
 #include <linux/magic.h>
 #include <linux/magic.h>
-//#include <linux/sched.h>
-//#include <locale.h>
-#include <netinet/ip.h>
+#include <linux/oom.h>
+#include <linux/sched.h>
+#include <locale.h>
 #include <poll.h>
 #include <pwd.h>
 #include <sched.h>
 #include <poll.h>
 #include <pwd.h>
 #include <sched.h>
-//#include <signal.h>
-//#include <stdarg.h>
-//#include <stdio.h>
-//#include <stdlib.h>
-//#include <string.h>
-//#include <sys/file.h>
-//#include <sys/ioctl.h>
-//#include <sys/mman.h>
-//#include <sys/mount.h>
-//#include <sys/personality.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/mount.h>
+#include <sys/personality.h>
 #include <sys/prctl.h>
 #include <sys/prctl.h>
-//#include <sys/resource.h>
-//#include <sys/stat.h>
-//#include <sys/statvfs.h>
-//#include <sys/time.h>
-//#include <sys/types.h>
-//#include <sys/utsname.h>
-//#include <sys/vfs.h>
-//#include <sys/wait.h>
-#include <sys/xattr.h>
-//#include <syslog.h>
-//#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/statvfs.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/utsname.h>
+#include <sys/vfs.h>
+#include <sys/wait.h>
+#include <syslog.h>
+#include <unistd.h>
 
 /* When we include libgen.h because we need dirname() we immediately
  * undefine basename() since libgen.h defines it as a macro to the
  * POSIX version which is really broken. We prefer GNU basename(). */
 
 /* When we include libgen.h because we need dirname() we immediately
  * undefine basename() since libgen.h defines it as a macro to the
  * POSIX version which is really broken. We prefer GNU basename(). */
-//#include <libgen.h>
-//#undef basename
+#include <libgen.h>
+#undef basename
 
 #ifdef HAVE_SYS_AUXV_H
 #include <sys/auxv.h>
 
 #ifdef HAVE_SYS_AUXV_H
 #include <sys/auxv.h>
 
 /* We include linux/fs.h as last of the system headers, as it
  * otherwise conflicts with sys/mount.h. Yay, Linux is great! */
 
 /* We include linux/fs.h as last of the system headers, as it
  * otherwise conflicts with sys/mount.h. Yay, Linux is great! */
-//#include <linux/fs.h>
+#include <linux/fs.h>
 
 
+#include "alloc-util.h"
 #include "build.h"
 #include "build.h"
-//#include "def.h"
+#include "def.h"
 //#include "device-nodes.h"
 //#include "device-nodes.h"
+#include "dirent-util.h"
 //#include "env-util.h"
 //#include "env-util.h"
+#include "escape.h"
 //#include "exit-status.h"
 //#include "exit-status.h"
+#include "fd-util.h"
 #include "fileio.h"
 #include "fileio.h"
-//#include "formats-util.h"
+#include "formats-util.h"
 #include "gunicode.h"
 #include "hashmap.h"
 #include "gunicode.h"
 #include "hashmap.h"
+#include "hexdecoct.h"
 #include "hostname-util.h"
 //#include "ioprio.h"
 #include "hostname-util.h"
 //#include "ioprio.h"
-//#include "log.h"
-//#include "macro.h"
-//#include "missing.h"
+#include "log.h"
+#include "macro.h"
+#include "missing.h"
 #include "mkdir.h"
 #include "mkdir.h"
+#include "parse-util.h"
 #include "path-util.h"
 #include "process-util.h"
 #include "random-util.h"
 #include "signal-util.h"
 #include "path-util.h"
 #include "process-util.h"
 #include "random-util.h"
 #include "signal-util.h"
+#include "set.h"
 #include "sparse-endian.h"
 #include "sparse-endian.h"
+#include "stat-util.h"
+#include "string-table.h"
+#include "string-util.h"
 #include "strv.h"
 #include "strv.h"
-//#include "terminal-util.h"
+#include "terminal-util.h"
+#include "user-util.h"
 #include "utf8.h"
 #include "util.h"
 #include "virt.h"
 #include "utf8.h"
 #include "util.h"
 #include "virt.h"
-#include "set.h"
 
 /* Put this test here for a lack of better place */
 assert_cc(EAGAIN == EWOULDBLOCK);
 
 /* Put this test here for a lack of better place */
 assert_cc(EAGAIN == EWOULDBLOCK);
@@ -119,6869 +126,716 @@ size_t page_size(void) {
         return pgsz;
 }
 
         return pgsz;
 }
 
-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;
-}
-
-bool streq_ptr(const char *a, const char *b) {
-        return strcmp_ptr(a, b) == 0;
-}
-
-char* endswith(const char *s, const char *postfix) {
-        size_t sl, pl;
-
-        assert(s);
-        assert(postfix);
+static int do_execute(char **directories, usec_t timeout, char *argv[]) {
+        _cleanup_hashmap_free_free_ Hashmap *pids = NULL;
+        _cleanup_set_free_free_ Set *seen = NULL;
+        char **directory;
 
 
-        sl = strlen(s);
-        pl = strlen(postfix);
+        /* We fork this all off from a child process so that we can
+         * somewhat cleanly make use of SIGALRM to set a time limit */
 
 
-        if (pl == 0)
-                return (char*) s + sl;
+        (void) reset_all_signal_handlers();
+        (void) reset_signal_mask();
 
 
-        if (sl < pl)
-                return NULL;
+        assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
 
 
-        if (memcmp(s + sl - pl, postfix, pl) != 0)
-                return NULL;
+        pids = hashmap_new(NULL);
+        if (!pids)
+                return log_oom();
 
 
-        return (char*) s + sl - pl;
-}
+        seen = set_new(&string_hash_ops);
+        if (!seen)
+                return log_oom();
 
 
-char* endswith_no_case(const char *s, const char *postfix) {
-        size_t sl, pl;
+        STRV_FOREACH(directory, directories) {
+                _cleanup_closedir_ DIR *d;
+                struct dirent *de;
 
 
-        assert(s);
-        assert(postfix);
+                d = opendir(*directory);
+                if (!d) {
+                        if (errno == ENOENT)
+                                continue;
 
 
-        sl = strlen(s);
-        pl = strlen(postfix);
+                        return log_error_errno(errno, "Failed to open directory %s: %m", *directory);
+                }
 
 
-        if (pl == 0)
-                return (char*) s + sl;
+                FOREACH_DIRENT(de, d, break) {
+                        _cleanup_free_ char *path = NULL;
+                        pid_t pid;
+                        int r;
 
 
-        if (sl < pl)
-                return NULL;
+                        if (!dirent_is_file(de))
+                                continue;
 
 
-        if (strcasecmp(s + sl - pl, postfix) != 0)
-                return NULL;
+                        if (set_contains(seen, de->d_name)) {
+                                log_debug("%1$s/%2$s skipped (%2$s was already seen).", *directory, de->d_name);
+                                continue;
+                        }
 
 
-        return (char*) s + sl - pl;
-}
+                        r = set_put_strdup(seen, de->d_name);
+                        if (r < 0)
+                                return log_oom();
 
 
-char* first_word(const char *s, const char *word) {
-        size_t sl, wl;
-        const char *p;
+                        path = strjoin(*directory, "/", de->d_name, NULL);
+                        if (!path)
+                                return log_oom();
 
 
-        assert(s);
-        assert(word);
+                        if (null_or_empty_path(path)) {
+                                log_debug("%s is empty (a mask).", path);
+                                continue;
+                        }
 
 
-        /* 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. */
+                        pid = fork();
+                        if (pid < 0) {
+                                log_error_errno(errno, "Failed to fork: %m");
+                                continue;
+                        } else if (pid == 0) {
+                                char *_argv[2];
 
 
-        sl = strlen(s);
-        wl = strlen(word);
+                                assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
 
 
-        if (sl < wl)
-                return NULL;
+                                if (!argv) {
+                                        _argv[0] = path;
+                                        _argv[1] = NULL;
+                                        argv = _argv;
+                                } else
+                                        argv[0] = path;
 
 
-        if (wl == 0)
-                return (char*) s;
+                                execv(path, argv);
+                                return log_error_errno(errno, "Failed to execute %s: %m", path);
+                        }
 
 
-        if (memcmp(s, word, wl) != 0)
-                return NULL;
+                        log_debug("Spawned %s as " PID_FMT ".", path, pid);
 
 
-        p = s + wl;
-        if (*p == 0)
-                return (char*) p;
+                        r = hashmap_put(pids, PID_TO_PTR(pid), path);
+                        if (r < 0)
+                                return log_oom();
+                        path = NULL;
+                }
+        }
 
 
-        if (!strchr(WHITESPACE, *p))
-                return NULL;
+        /* Abort execution of this process after the timout. We simply
+         * rely on SIGALRM as default action terminating the process,
+         * and turn on alarm(). */
 
 
-        p += strspn(p, WHITESPACE);
-        return (char*) p;
-}
+        if (timeout != USEC_INFINITY)
+                alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC);
 
 
-size_t cescape_char(char c, char *buf) {
-        char * buf_old = buf;
+        while (!hashmap_isempty(pids)) {
+                _cleanup_free_ char *path = NULL;
+                pid_t pid;
 
 
-        switch (c) {
+                pid = PTR_TO_PID(hashmap_first_key(pids));
+                assert(pid > 0);
 
 
-                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;
+                path = hashmap_remove(pids, PID_TO_PTR(pid));
+                assert(path);
 
 
-                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;
+                wait_for_terminate_and_warn(path, pid, true);
         }
 
         }
 
-        return buf - buf_old;
+        return 0;
 }
 
 }
 
-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;
-}
+void execute_directories(const char* const* directories, usec_t timeout, char *argv[]) {
+        pid_t executor_pid;
+        int r;
+        char *name;
+        char **dirs = (char**) directories;
 
 
-int safe_close(int fd) {
+        assert(!strv_isempty(dirs));
 
 
-        /*
-         * 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);
-         */
+        name = basename(dirs[0]);
+        assert(!isempty(name));
 
 
-        if (fd >= 0) {
-                PROTECT_ERRNO;
+        /* Executes all binaries in the directories in parallel and waits
+         * for them to finish. Optionally a timeout is applied. If a file
+         * with the same name exists in more than one directory, the
+         * earliest one wins. */
 
 
-                /* 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... */
+        executor_pid = fork();
+        if (executor_pid < 0) {
+                log_error_errno(errno, "Failed to fork: %m");
+                return;
 
 
-                assert_se(close_nointr(fd) != -EBADF);
+        } else if (executor_pid == 0) {
+                r = do_execute(dirs, timeout, argv);
+                _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
         }
 
         }
 
-        return -1;
+        wait_for_terminate_and_warn(name, executor_pid, true);
 }
 
 }
 
-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]);
+bool plymouth_running(void) {
+        return access("/run/plymouth/pid", F_OK) >= 0;
 }
 
 }
 
-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;
+bool display_is_local(const char *display) {
+        assert(display);
 
 
-        return -errno;
+        return
+                display[0] == ':' &&
+                display[1] >= '0' &&
+                display[1] <= '9';
 }
 
 }
 
-FILE* safe_fclose(FILE *f) {
-
-        /* Same as safe_close(), but for fclose() */
+int socket_from_display(const char *display, char **path) {
+        size_t k;
+        char *f, *c;
 
 
-        if (f) {
-                PROTECT_ERRNO;
+        assert(display);
+        assert(path);
 
 
-                assert_se(fclose_nointr(f) != EBADF);
-        }
+        if (!display_is_local(display))
+                return -EINVAL;
 
 
-        return NULL;
-}
+        k = strspn(display+1, "0123456789");
 
 
-DIR* safe_closedir(DIR *d) {
+        f = new(char, strlen("/tmp/.X11-unix/X") + k + 1);
+        if (!f)
+                return -ENOMEM;
 
 
-        if (d) {
-                PROTECT_ERRNO;
+        c = stpcpy(f, "/tmp/.X11-unix/X");
+        memcpy(c, display+1, k);
+        c[k] = 0;
 
 
-                assert_se(closedir(d) >= 0 || errno != EBADF);
-        }
+        *path = f;
 
 
-        return NULL;
+        return 0;
 }
 
 }
 
-int unlink_noerrno(const char *path) {
-        PROTECT_ERRNO;
+int block_get_whole_disk(dev_t d, dev_t *ret) {
+        char *p, *s;
         int r;
         int r;
+        unsigned n, m;
 
 
-        r = unlink(path);
-        if (r < 0)
-                return -errno;
+        assert(ret);
 
 
-        return 0;
-}
+        /* If it has a queue this is good enough for us */
+        if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0)
+                return -ENOMEM;
 
 
-int parse_boolean(const char *v) {
-        assert(v);
+        r = access(p, F_OK);
+        free(p);
 
 
-        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"))
+        if (r >= 0) {
+                *ret = d;
                 return 0;
                 return 0;
+        }
 
 
-        return -EINVAL;
-}
-
-int parse_pid(const char *s, pid_t* ret_pid) {
-        unsigned long ul = 0;
-        pid_t pid;
-        int r;
+        /* If it is a partition find the originating device */
+        if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0)
+                return -ENOMEM;
 
 
-        assert(s);
-        assert(ret_pid);
+        r = access(p, F_OK);
+        free(p);
 
 
-        r = safe_atolu(s, &ul);
         if (r < 0)
         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;
-}
-
-bool uid_is_valid(uid_t uid) {
-
-        /* Some libc APIs use UID_INVALID as special placeholder */
-        if (uid == (uid_t) 0xFFFFFFFF)
-                return false;
-
-        /* A long time ago UIDs where 16bit, hence explicitly avoid the 16bit -1 too */
-        if (uid == (uid_t) 0xFFFF)
-                return false;
-
-        return true;
-}
+                return -ENOENT;
 
 
-int parse_uid(const char *s, uid_t* ret_uid) {
-        unsigned long ul = 0;
-        uid_t uid;
-        int r;
+        /* Get parent dev_t */
+        if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0)
+                return -ENOMEM;
 
 
-        assert(s);
+        r = read_one_line_file(p, &s);
+        free(p);
 
 
-        r = safe_atolu(s, &ul);
         if (r < 0)
                 return r;
 
         if (r < 0)
                 return r;
 
-        uid = (uid_t) ul;
-
-        if ((unsigned long) uid != ul)
-                return -ERANGE;
-
-        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_uid)
-                *ret_uid = uid;
+        r = sscanf(s, "%u:%u", &m, &n);
+        free(s);
 
 
-        return 0;
-}
+        if (r != 2)
+                return -EINVAL;
 
 
-int safe_atou(const char *s, unsigned *ret_u) {
-        char *x = NULL;
-        unsigned long l;
+        /* Only return this if it is really good enough for us. */
+        if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0)
+                return -ENOMEM;
 
 
-        assert(s);
-        assert(ret_u);
+        r = access(p, F_OK);
+        free(p);
 
 
-        errno = 0;
-        l = strtoul(s, &x, 0);
+        if (r >= 0) {
+                *ret = makedev(m, n);
+                return 0;
+        }
 
 
-        if (!x || x == s || *x || errno)
-                return errno > 0 ? -errno : -EINVAL;
+        return -ENOENT;
+}
 
 
-        if ((unsigned long) (unsigned) l != l)
-                return -ERANGE;
+bool kexec_loaded(void) {
+       bool loaded = false;
+       char *s;
 
 
-        *ret_u = (unsigned) l;
-        return 0;
+       if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) {
+               if (s[0] == '1')
+                       loaded = true;
+               free(s);
+       }
+       return loaded;
 }
 
 }
 
-int safe_atoi(const char *s, int *ret_i) {
-        char *x = NULL;
-        long l;
+int prot_from_flags(int flags) {
 
 
-        assert(s);
-        assert(ret_i);
+        switch (flags & O_ACCMODE) {
 
 
-        errno = 0;
-        l = strtol(s, &x, 0);
+        case O_RDONLY:
+                return PROT_READ;
 
 
-        if (!x || x == s || *x || errno)
-                return errno > 0 ? -errno : -EINVAL;
+        case O_WRONLY:
+                return PROT_WRITE;
 
 
-        if ((long) (int) l != l)
-                return -ERANGE;
+        case O_RDWR:
+                return PROT_READ|PROT_WRITE;
 
 
-        *ret_i = (int) l;
-        return 0;
-}
-
-int safe_atou8(const char *s, uint8_t *ret) {
-        char *x = NULL;
-        unsigned long l;
-
-        assert(s);
-        assert(ret);
-
-        errno = 0;
-        l = strtoul(s, &x, 0);
-
-        if (!x || x == s || *x || errno)
-                return errno > 0 ? -errno : -EINVAL;
-
-        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);
-
-        errno = 0;
-        l = strtoul(s, &x, 0);
-
-        if (!x || x == s || *x || errno)
-                return errno > 0 ? -errno : -EINVAL;
-
-        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 (!x || x == s || *x || errno)
-                return errno > 0 ? -errno : -EINVAL;
-
-        if ((long) (int16_t) l != l)
-                return -ERANGE;
-
-        *ret = (int16_t) 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);
-
-        errno = 0;
-        l = strtoull(s, &x, 0);
-
-        if (!x || x == s || *x || errno)
-                return errno ? -errno : -EINVAL;
-
-        *ret_llu = l;
-        return 0;
+        default:
+                return -EINVAL;
+        }
 }
 
 }
 
-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);
+int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) {
+        bool stdout_is_tty, stderr_is_tty;
+        pid_t parent_pid, agent_pid;
+        sigset_t ss, saved_ss;
+        unsigned n, i;
+        va_list ap;
+        char **l;
 
 
-        if (!x || x == s || *x || errno)
-                return errno ? -errno : -EINVAL;
+        assert(pid);
+        assert(path);
 
 
-        *ret_lli = l;
-        return 0;
-}
+        /* Spawns a temporary TTY agent, making sure it goes away when
+         * we go away */
 
 
-int safe_atod(const char *s, double *ret_d) {
-        char *x = NULL;
-        double d = 0;
-        locale_t loc;
+        parent_pid = getpid();
 
 
-        assert(s);
-        assert(ret_d);
+        /* First we temporarily block all signals, so that the new
+         * child has them blocked initially. This way, we can be sure
+         * that SIGTERMs are not lost we might send to the agent. */
+        assert_se(sigfillset(&ss) >= 0);
+        assert_se(sigprocmask(SIG_SETMASK, &ss, &saved_ss) >= 0);
 
 
-        loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0);
-        if (loc == (locale_t) 0)
+        agent_pid = fork();
+        if (agent_pid < 0) {
+                assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0);
                 return -errno;
                 return -errno;
-
-        errno = 0;
-        d = strtod_l(s, &x, loc);
-
-        if (!x || x == s || *x || errno) {
-                freelocale(loc);
-                return errno ? -errno : -EINVAL;
         }
 
         }
 
-        freelocale(loc);
-        *ret_d = (double) d;
-        return 0;
-}
-
-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 (agent_pid != 0) {
+                assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0);
+                *pid = agent_pid;
+                return 0;
         }
 
         }
 
-        /* if s ends in \, return index of previous char */
-        return n - escaped;
-}
+        /* In the child:
+         *
+         * Make sure the agent goes away when the parent dies */
+        if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
+                _exit(EXIT_FAILURE);
 
 
-/* Split a string into words. */
-const char* split(const char **state, size_t *l, const char *separator, bool quoted) {
-        const char *current;
+        /* Make sure we actually can kill the agent, if we need to, in
+         * case somebody invoked us from a shell script that trapped
+         * SIGTERM or so... */
+        (void) reset_all_signal_handlers();
+        (void) reset_signal_mask();
 
 
-        current = *state;
+        /* Check whether our parent died before we were able
+         * to set the death signal and unblock the signals */
+        if (getppid() != parent_pid)
+                _exit(EXIT_SUCCESS);
 
 
-        if (!*current) {
-                assert(**state == '\0');
-                return NULL;
-        }
+        /* Don't leak fds to the agent */
+        close_all_fds(except, n_except);
 
 
-        current += strspn(current, separator);
-        if (!*current) {
-                *state = current;
-                return NULL;
-        }
+        stdout_is_tty = isatty(STDOUT_FILENO);
+        stderr_is_tty = isatty(STDERR_FILENO);
 
 
-        if (quoted && strchr("\'\"", *current)) {
-                char quotechars[2] = {*current, '\0'};
+        if (!stdout_is_tty || !stderr_is_tty) {
+                int fd;
 
 
-                *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;
+                /* Detach from stdout/stderr. and reopen
+                 * /dev/tty for them. This is important to
+                 * ensure that when systemctl is started via
+                 * popen() or a similar call that expects to
+                 * read EOF we actually do generate EOF and
+                 * not delay this indefinitely by because we
+                 * keep an unused copy of stdin around. */
+                fd = open("/dev/tty", O_WRONLY);
+                if (fd < 0) {
+                        log_error_errno(errno, "Failed to open /dev/tty: %m");
+                        _exit(EXIT_FAILURE);
                 }
                 }
-                *state = current + *l;
-        } else {
-                *l = strcspn(current, separator);
-                *state = current + *l;
-        }
-
-        return current;
-}
-
-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;
-}
-
-char *truncate_nl(char *s) {
-        assert(s);
-
-        s[strcspn(s, NEWLINE)] = 0;
-        return s;
-}
-
-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);
-}
-
-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 (!stdout_is_tty)
+                        dup2(fd, STDOUT_FILENO);
 
 
-                if ((size_t) n < l-1) {
-                        c[n] = 0;
-                        *ret = c;
-                        return 0;
-                }
+                if (!stderr_is_tty)
+                        dup2(fd, STDERR_FILENO);
 
 
-                free(c);
-                l *= 2;
+                if (fd > 2)
+                        close(fd);
         }
         }
-}
-
-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;
+        /* Count arguments */
+        va_start(ap, path);
+        for (n = 0; va_arg(ap, char*); n++)
+                ;
+        va_end(ap);
 
 
-        value = strdup(value);
-        if (!value)
-                return -ENOMEM;
+        /* Allocate strv */
+        l = alloca(sizeof(char *) * (n + 1));
 
 
-        *ret = value;
+        /* Fill in arguments */
+        va_start(ap, path);
+        for (i = 0; i <= n; i++)
+                l[i] = va_arg(ap, char*);
+        va_end(ap);
 
 
-        return 0;
+        execv(path, l);
+        _exit(EXIT_FAILURE);
 }
 }
-#endif // 0
 
 
-int readlink_and_make_absolute(const char *p, char **r) {
-        _cleanup_free_ char *target = NULL;
-        char *k;
-        int j;
+bool in_initrd(void) {
+        static int saved = -1;
+        struct statfs s;
 
 
-        assert(p);
-        assert(r);
+        if (saved >= 0)
+                return saved;
 
 
-        j = readlink_malloc(p, &target);
-        if (j < 0)
-                return j;
+        /* We make two checks here:
+         *
+         * 1. the flag file /etc/initrd-release must exist
+         * 2. the root file system must be a memory file system
+         *
+         * The second check is extra paranoia, since misdetecting an
+         * initrd can have bad bad consequences due the initrd
+         * emptying when transititioning to the main systemd.
+         */
 
 
-        k = file_in_same_dir(p, target);
-        if (!k)
-                return -ENOMEM;
+        saved = access("/etc/initrd-release", F_OK) >= 0 &&
+                statfs("/", &s) >= 0 &&
+                is_temporary_fs(&s);
 
 
-        *r = k;
-        return 0;
+        return saved;
 }
 
 }
 
-/// 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);
+/* hey glibc, APIs with callbacks without a user pointer are so useless */
+void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
+                 int (*compar) (const void *, const void *, void *), void *arg) {
+        size_t l, u, idx;
+        const void *p;
+        int comparison;
 
 
-        return 0;
+        l = 0;
+        u = nmemb;
+        while (l < u) {
+                idx = (l + u) / 2;
+                p = (void *)(((const char *) base) + (idx * size));
+                comparison = compar(key, p, arg);
+                if (comparison < 0)
+                        u = idx;
+                else if (comparison > 0)
+                        l = idx + 1;
+                else
+                        return (void *)p;
+        }
+        return NULL;
 }
 }
-#endif // 0
-
-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;
+int on_ac_power(void) {
+        bool found_offline = false, found_online = false;
+        _cleanup_closedir_ DIR *d = NULL;
 
 
-        *e = 0;
+        d = opendir("/sys/class/power_supply");
+        if (!d)
+                return errno == ENOENT ? true : -errno;
 
 
-        return s;
-}
+        for (;;) {
+                struct dirent *de;
+                _cleanup_close_ int fd = -1, device = -1;
+                char contents[6];
+                ssize_t n;
 
 
-/// UNNEEDED by elogind
-#if 0
-char *delete_chars(char *s, const char *bad) {
-        char *f, *t;
+                errno = 0;
+                de = readdir(d);
+                if (!de && errno != 0)
+                        return -errno;
 
 
-        /* Drops all whitespace, regardless where in the string */
+                if (!de)
+                        break;
 
 
-        for (f = s, t = s; *f; f++) {
-                if (strchr(bad, *f))
+                if (hidden_file(de->d_name))
                         continue;
 
                         continue;
 
-                *(t++) = *f;
-        }
-
-        *t = 0;
-
-        return s;
-}
-#endif // 0
-
-char *file_in_same_dir(const char *path, const char *filename) {
-        char *e, *ret;
-        size_t k;
-
-        assert(path);
-        assert(filename);
-
-        /* This removes the last component of path and appends
-         * filename, unless the latter is absolute anyway or the
-         * former isn't */
-
-        if (path_is_absolute(filename))
-                return strdup(filename);
-
-        e = strrchr(path, '/');
-        if (!e)
-                return strdup(filename);
-
-        k = strlen(filename);
-        ret = new(char, (e + 1 - path) + k + 1);
-        if (!ret)
-                return NULL;
-
-        memcpy(mempcpy(ret, path, e + 1 - path), filename, k + 1);
-        return ret;
-}
-
-/// 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;
-
-                if (!(t = strndup(path, l)))
-                        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;
-}
-#endif // 0
-
-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;
-}
-
-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 *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;
-}
-
-static 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;
-}
-
-/// UNNEEDED by elogind
-#if 0
-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;
-}
-#endif // 0
-
-_pure_ static bool hidden_file_allow_backup(const char *filename) {
-        assert(filename);
-
-        return
-                filename[0] == '.' ||
-                streq(filename, "lost+found") ||
-                streq(filename, "aquota.user") ||
-                streq(filename, "aquota.group") ||
-                endswith(filename, ".rpmnew") ||
-                endswith(filename, ".rpmsave") ||
-                endswith(filename, ".rpmorig") ||
-                endswith(filename, ".dpkg-old") ||
-                endswith(filename, ".dpkg-new") ||
-                endswith(filename, ".dpkg-tmp") ||
-                endswith(filename, ".dpkg-dist") ||
-                endswith(filename, ".dpkg-bak") ||
-                endswith(filename, ".dpkg-backup") ||
-                endswith(filename, ".dpkg-remove") ||
-                endswith(filename, ".swp");
-}
-
-bool hidden_file(const char *filename) {
-        assert(filename);
-
-        if (endswith(filename, "~"))
-                return true;
-
-        return hidden_file_allow_backup(filename);
-}
-
-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;
-}
-
-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;
-}
-
-/// UNNEEDED by elogind
-#if 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);
-}
-#endif // 0
-
-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;
-        }
-}
-
-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]);
-}
-
-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 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);
-                if (*p == '-')
-                        return -ERANGE;
-
-                errno = 0;
-                l = strtoull(p, &e, 10);
-                if (errno > 0)
-                        return -errno;
-                if (e == p)
-                        return -EINVAL;
-
-                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;
-}
-
-bool is_device_path(const char *path) {
-
-        /* Returns true on paths that refer to a device, either in
-         * sysfs or in /dev */
-
-        return
-                path_startswith(path, "/dev/") ||
-                path_startswith(path, "/sys/");
-}
-
-/// UNNEEDED by elogind
-#if 0
-int dir_is_empty(const char *path) {
-        _cleanup_closedir_ DIR *d;
-
-        d = opendir(path);
-        if (!d)
-                return -errno;
-
-        for (;;) {
-                struct dirent *de;
-
-                errno = 0;
-                de = readdir(d);
-                if (!de && errno != 0)
-                        return -errno;
-
-                if (!de)
-                        return 1;
-
-                if (!hidden_file(de->d_name))
-                        return 0;
-        }
-}
-
-char* dirname_malloc(const char *path) {
-        char *d, *dir, *dir2;
-
-        d = strdup(path);
-        if (!d)
-                return NULL;
-        dir = dirname(d);
-        assert(dir);
-
-        if (dir != d) {
-                dir2 = strdup(dir);
-                free(d);
-                return dir2;
-        }
-
-        return dir;
-}
-
-void rename_process(const char name[8]) {
-        assert(name);
-
-        /* This is a like a poor man's setproctitle(). It changes the
-         * comm field, argv[0], and also the glibc's internally used
-         * name of the process. For the first one a limit of 16 chars
-         * applies, to the second one usually one of 10 (i.e. length
-         * of "/sbin/init"), to the third one one of 7 (i.e. length of
-         * "systemd"). If you pass a longer string it will be
-         * truncated */
-
-        prctl(PR_SET_NAME, name);
-
-        if (program_invocation_name)
-                strncpy(program_invocation_name, name, strlen(program_invocation_name));
-
-        if (saved_argc > 0) {
-                int i;
-
-                if (saved_argv[0])
-                        strncpy(saved_argv[0], name, strlen(saved_argv[0]));
-
-                for (i = 1; i < saved_argc; i++) {
-                        if (!saved_argv[i])
-                                break;
-
-                        memzero(saved_argv[i], strlen(saved_argv[i]));
-                }
-        }
-}
-#endif // 0
-
-char *lookup_uid(uid_t uid) {
-        long bufsize;
-        char *name;
-        _cleanup_free_ char *buf = NULL;
-        struct passwd pwbuf, *pw = NULL;
-
-        /* Shortcut things to avoid NSS lookups */
-        if (uid == 0)
-                return strdup("root");
-
-        bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
-        if (bufsize <= 0)
-                bufsize = 4096;
-
-        buf = malloc(bufsize);
-        if (!buf)
-                return NULL;
-
-        if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw)
-                return strdup(pw->pw_name);
-
-        if (asprintf(&name, UID_FMT, uid) < 0)
-                return NULL;
-
-        return name;
-}
-
-/// UNNEEDED by elogind
-#if 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 lookup_uid(uid);
-}
-
-char *getusername_malloc(void) {
-        const char *e;
-
-        e = getenv("USER");
-        if (e)
-                return strdup(e);
-
-        return lookup_uid(getuid());
-}
-#endif // 0
-
-bool is_temporary_fs(const struct statfs *s) {
-        assert(s);
-
-        return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) ||
-               F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC);
-}
-
-int fd_is_temporary_fs(int fd) {
-        struct statfs s;
-
-        if (fstatfs(fd, &s) < 0)
-                return -errno;
-
-        return is_temporary_fs(&s);
-}
-
-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;
-}
-
-/// UNNEEDED by elogind
-#if 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;
-}
-
-#endif // 0
-
-int files_same(const char *filea, const char *fileb) {
-        struct stat a, b;
-
-        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;
-}
-
-int running_in_chroot(void) {
-        int ret;
-
-        ret = files_same("/proc/1/root", "/");
-        if (ret < 0)
-                return ret;
-
-        return ret == 0;
-}
-
-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);
-}
-
-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 > 0) {
-                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, 0);
-}
-
-/// UNNEEDED by elogind
-#if 0
-static char *unquote(const char *s, const char* quotes) {
-        size_t l;
-        assert(s);
-
-        /* This is rather stupid, simply removes the heading and
-         * trailing quotes if there is one. Doesn't care about
-         * escaping or anything.
-         *
-         * DON'T USE THIS FOR NEW CODE ANYMORE!*/
-
-        l = strlen(s);
-        if (l < 2)
-                return strdup(s);
-
-        if (strchr(quotes, s[0]) && s[l-1] == s[0])
-                return strndup(s+1, l-2);
-
-        return strdup(s);
-}
-#endif // 0
-
-noreturn void freeze(void) {
-
-        /* Make sure nobody waits for us on a socket anymore */
-        close_all_fds(NULL, 0);
-
-        sync();
-
-        for (;;)
-                pause();
-}
-
-bool null_or_empty(struct stat *st) {
-        assert(st);
-
-        if (S_ISREG(st->st_mode) && st->st_size <= 0)
-                return true;
-
-        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
-
-DIR *xopendirat(int fd, const char *name, int flags) {
-        int nfd;
-        DIR *d;
-
-        assert(!(flags & O_CREAT));
-
-        nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0);
-        if (nfd < 0)
-                return NULL;
-
-        d = fdopendir(nfd);
-        if (!d) {
-                safe_close(nfd);
-                return NULL;
-        }
-
-        return d;
-}
-
-/// UNNEEDED by elogind
-#if 0
-static char *tag_to_udev_node(const char *tagvalue, const char *by) {
-        _cleanup_free_ char *t = NULL, *u = NULL;
-        size_t enc_len;
-
-        u = unquote(tagvalue, QUOTES);
-        if (!u)
-                return NULL;
-
-        enc_len = strlen(u) * 4 + 1;
-        t = new(char, enc_len);
-        if (!t)
-                return NULL;
-
-        if (encode_devnode_name(u, t, enc_len) < 0)
-                return NULL;
-
-        return strjoin("/dev/disk/by-", by, "/", t, NULL);
-}
-
-char *fstab_node_to_udev_node(const char *p) {
-        assert(p);
-
-        if (startswith(p, "LABEL="))
-                return tag_to_udev_node(p+6, "label");
-
-        if (startswith(p, "UUID="))
-                return tag_to_udev_node(p+5, "uuid");
-
-        if (startswith(p, "PARTUUID="))
-                return tag_to_udev_node(p+9, "partuuid");
-
-        if (startswith(p, "PARTLABEL="))
-                return tag_to_udev_node(p+10, "partlabel");
-
-        return strdup(p);
-}
-#endif // 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);
-}
-
-static int do_execute(char **directories, usec_t timeout, char *argv[]) {
-        _cleanup_hashmap_free_free_ Hashmap *pids = NULL;
-        _cleanup_set_free_free_ Set *seen = NULL;
-        char **directory;
-
-        /* We fork this all off from a child process so that we can
-         * somewhat cleanly make use of SIGALRM to set a time limit */
-
-        (void) reset_all_signal_handlers();
-        (void) reset_signal_mask();
-
-        assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
-
-        pids = hashmap_new(NULL);
-        if (!pids)
-                return log_oom();
-
-        seen = set_new(&string_hash_ops);
-        if (!seen)
-                return log_oom();
-
-        STRV_FOREACH(directory, directories) {
-                _cleanup_closedir_ DIR *d;
-                struct dirent *de;
-
-                d = opendir(*directory);
-                if (!d) {
-                        if (errno == ENOENT)
-                                continue;
-
-                        return log_error_errno(errno, "Failed to open directory %s: %m", *directory);
-                }
-
-                FOREACH_DIRENT(de, d, break) {
-                        _cleanup_free_ char *path = NULL;
-                        pid_t pid;
-                        int r;
-
-                        if (!dirent_is_file(de))
-                                continue;
-
-                        if (set_contains(seen, de->d_name)) {
-                                log_debug("%1$s/%2$s skipped (%2$s was already seen).", *directory, de->d_name);
-                                continue;
-                        }
-
-                        r = set_put_strdup(seen, de->d_name);
-                        if (r < 0)
-                                return log_oom();
-
-                        path = strjoin(*directory, "/", de->d_name, NULL);
-                        if (!path)
-                                return log_oom();
-
-                        if (null_or_empty_path(path)) {
-                                log_debug("%s is empty (a mask).", path);
-                                continue;
-                        }
-
-                        pid = fork();
-                        if (pid < 0) {
-                                log_error_errno(errno, "Failed to fork: %m");
-                                continue;
-                        } else if (pid == 0) {
-                                char *_argv[2];
-
-                                assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
-
-                                if (!argv) {
-                                        _argv[0] = path;
-                                        _argv[1] = NULL;
-                                        argv = _argv;
-                                } else
-                                        argv[0] = path;
-
-                                execv(path, argv);
-                                return log_error_errno(errno, "Failed to execute %s: %m", path);
-                        }
-
-                        log_debug("Spawned %s as " PID_FMT ".", path, pid);
-
-                        r = hashmap_put(pids, UINT_TO_PTR(pid), path);
-                        if (r < 0)
-                                return log_oom();
-                        path = NULL;
-                }
-        }
-
-        /* Abort execution of this process after the timout. We simply
-         * rely on SIGALRM as default action terminating the process,
-         * and turn on alarm(). */
-
-        if (timeout != USEC_INFINITY)
-                alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC);
-
-        while (!hashmap_isempty(pids)) {
-                _cleanup_free_ char *path = NULL;
-                pid_t pid;
-
-                pid = PTR_TO_UINT(hashmap_first_key(pids));
-                assert(pid > 0);
-
-                path = hashmap_remove(pids, UINT_TO_PTR(pid));
-                assert(path);
-
-                wait_for_terminate_and_warn(path, pid, true);
-        }
-
-        return 0;
-}
-
-void execute_directories(const char* const* directories, usec_t timeout, char *argv[]) {
-        pid_t executor_pid;
-        int r;
-        char *name;
-        char **dirs = (char**) directories;
-
-        assert(!strv_isempty(dirs));
-
-        name = basename(dirs[0]);
-        assert(!isempty(name));
-
-        /* Executes all binaries in the directories in parallel and waits
-         * for them to finish. Optionally a timeout is applied. If a file
-         * with the same name exists in more than one directory, the
-         * earliest one wins. */
-
-        executor_pid = fork();
-        if (executor_pid < 0) {
-                log_error_errno(errno, "Failed to fork: %m");
-                return;
-
-        } else if (executor_pid == 0) {
-                r = do_execute(dirs, timeout, argv);
-                _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
-        }
-
-        wait_for_terminate_and_warn(name, executor_pid, true);
-}
-
-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;
-}
-
-/// UNNEEDED by elogind
-#if 0
-bool plymouth_running(void) {
-        return access("/run/plymouth/pid", F_OK) >= 0;
-}
-#endif // 0
-
-char* strshorten(char *s, size_t l) {
-        assert(s);
-
-        if (l < strlen(s))
-                s[l] = 0;
-
-        return s;
-}
-
-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;
-}
-
-int fopen_temporary(const char *path, FILE **_f, char **_temp_path) {
-        FILE *f;
-        char *t;
-        int r, fd;
-
-        assert(path);
-        assert(_f);
-        assert(_temp_path);
-
-        r = tempfn_xxxxxx(path, NULL, &t);
-        if (r < 0)
-                return r;
-
-        fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC);
-        if (fd < 0) {
-                free(t);
-                return -errno;
-        }
-
-        f = fdopen(fd, "we");
-        if (!f) {
-                unlink_noerrno(t);
-                free(t);
-                safe_close(fd);
-                return -errno;
-        }
-
-        *_f = f;
-        *_temp_path = t;
-
-        return 0;
-}
-
-/// UNNEEDED by elogind
-#if 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 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 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;
-}
-#endif // 0
-
-bool display_is_local(const char *display) {
-        assert(display);
-
-        return
-                display[0] == ':' &&
-                display[1] >= '0' &&
-                display[1] <= '9';
-}
-
-int socket_from_display(const char *display, char **path) {
-        size_t k;
-        char *f, *c;
-
-        assert(display);
-        assert(path);
-
-        if (!display_is_local(display))
-                return -EINVAL;
-
-        k = strspn(display+1, "0123456789");
-
-        f = new(char, strlen("/tmp/.X11-unix/X") + k + 1);
-        if (!f)
-                return -ENOMEM;
-
-        c = stpcpy(f, "/tmp/.X11-unix/X");
-        memcpy(c, display+1, k);
-        c[k] = 0;
-
-        *path = f;
-
-        return 0;
-}
-
-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)
-                *uid = p->pw_uid;
-
-        if (gid)
-                *gid = p->pw_gid;
-
-        if (home)
-                *home = p->pw_dir;
-
-        if (shell)
-                *shell = p->pw_shell;
-
-        return 0;
-}
-
-char* uid_to_name(uid_t uid) {
-        struct passwd *p;
-        char *r;
-
-        if (uid == 0)
-                return strdup("root");
-
-        p = getpwuid(uid);
-        if (p)
-                return strdup(p->pw_name);
-
-        if (asprintf(&r, UID_FMT, uid) < 0)
-                return NULL;
-
-        return r;
-}
-
-char* gid_to_name(gid_t gid) {
-        struct group *p;
-        char *r;
-
-        if (gid == 0)
-                return strdup("root");
-
-        p = getgrgid(gid);
-        if (p)
-                return strdup(p->gr_name);
-
-        if (asprintf(&r, GID_FMT, gid) < 0)
-                return NULL;
-
-        return r;
-}
-
-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)
-                *gid = g->gr_gid;
-
-        return 0;
-}
-
-int in_gid(gid_t gid) {
-        gid_t *gids;
-        int ngroups_max, r, i;
-
-        if (getgid() == gid)
-                return 1;
-
-        if (getegid() == gid)
-                return 1;
-
-        ngroups_max = sysconf(_SC_NGROUPS_MAX);
-        assert(ngroups_max > 0);
-
-        gids = alloca(sizeof(gid_t) * ngroups_max);
-
-        r = getgroups(ngroups_max, gids);
-        if (r < 0)
-                return -errno;
-
-        for (i = 0; i < r; i++)
-                if (gids[i] == gid)
-                        return 1;
-
-        return 0;
-}
-
-/// UNNEEDED by elogind
-#if 0
-int in_group(const char *name) {
-        int r;
-        gid_t gid;
-
-        r = get_group_creds(&name, &gid);
-        if (r < 0)
-                return r;
-
-        return in_gid(gid);
-}
-
-int glob_exists(const char *path) {
-        _cleanup_globfree_ glob_t g = {};
-        int k;
-
-        assert(path);
-
-        errno = 0;
-        k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g);
-
-        if (k == GLOB_NOMATCH)
-                return 0;
-        else if (k == GLOB_NOSPACE)
-                return -ENOMEM;
-        else if (k == 0)
-                return !strv_isempty(g.gl_pathv);
-        else
-                return errno ? -errno : -EIO;
-}
-
-int glob_extend(char ***strv, const char *path) {
-        _cleanup_globfree_ glob_t g = {};
-        int k;
-        char **p;
-
-        errno = 0;
-        k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g);
-
-        if (k == GLOB_NOMATCH)
-                return -ENOENT;
-        else if (k == GLOB_NOSPACE)
-                return -ENOMEM;
-        else if (k != 0 || strv_isempty(g.gl_pathv))
-                return errno ? -errno : -EIO;
-
-        STRV_FOREACH(p, g.gl_pathv) {
-                k = strv_extend(strv, *p);
-                if (k < 0)
-                        break;
-        }
-
-        return k;
-}
-#endif // 0
-
-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;
-}
-
-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;
-}
-
-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;
-}
-
-bool is_main_thread(void) {
-        static thread_local int cached = 0;
-
-        if (_unlikely_(cached == 0))
-                cached = getpid() == gettid() ? 1 : -1;
-
-        return cached > 0;
-}
-
-/// UNNEEDED by elogind
-#if 0
-int block_get_whole_disk(dev_t d, dev_t *ret) {
-        char *p, *s;
-        int r;
-        unsigned n, m;
-
-        assert(ret);
-
-        /* If it has a queue this is good enough for us */
-        if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0)
-                return -ENOMEM;
-
-        r = access(p, F_OK);
-        free(p);
-
-        if (r >= 0) {
-                *ret = d;
-                return 0;
-        }
-
-        /* If it is a partition find the originating device */
-        if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0)
-                return -ENOMEM;
-
-        r = access(p, F_OK);
-        free(p);
-
-        if (r < 0)
-                return -ENOENT;
-
-        /* Get parent dev_t */
-        if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0)
-                return -ENOMEM;
-
-        r = read_one_line_file(p, &s);
-        free(p);
-
-        if (r < 0)
-                return r;
-
-        r = sscanf(s, "%u:%u", &m, &n);
-        free(s);
-
-        if (r != 2)
-                return -EINVAL;
-
-        /* Only return this if it is really good enough for us. */
-        if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0)
-                return -ENOMEM;
-
-        r = access(p, F_OK);
-        free(p);
-
-        if (r >= 0) {
-                *ret = makedev(m, n);
-                return 0;
-        }
-
-        return -ENOENT;
-}
-
-static const char *const ioprio_class_table[] = {
-        [IOPRIO_CLASS_NONE] = "none",
-        [IOPRIO_CLASS_RT] = "realtime",
-        [IOPRIO_CLASS_BE] = "best-effort",
-        [IOPRIO_CLASS_IDLE] = "idle"
-};
-
-DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX);
-
-static const char *const sigchld_code_table[] = {
-        [CLD_EXITED] = "exited",
-        [CLD_KILLED] = "killed",
-        [CLD_DUMPED] = "dumped",
-        [CLD_TRAPPED] = "trapped",
-        [CLD_STOPPED] = "stopped",
-        [CLD_CONTINUED] = "continued",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
-
-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));
-#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
-static const char* const sched_policy_table[] = {
-        [SCHED_OTHER] = "other",
-        [SCHED_BATCH] = "batch",
-        [SCHED_IDLE] = "idle",
-        [SCHED_FIFO] = "fifo",
-        [SCHED_RR] = "rr"
-};
-
-DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX);
-#endif // 0
-
-static const char* const rlimit_table[_RLIMIT_MAX] = {
-        [RLIMIT_CPU] = "LimitCPU",
-        [RLIMIT_FSIZE] = "LimitFSIZE",
-        [RLIMIT_DATA] = "LimitDATA",
-        [RLIMIT_STACK] = "LimitSTACK",
-        [RLIMIT_CORE] = "LimitCORE",
-        [RLIMIT_RSS] = "LimitRSS",
-        [RLIMIT_NOFILE] = "LimitNOFILE",
-        [RLIMIT_AS] = "LimitAS",
-        [RLIMIT_NPROC] = "LimitNPROC",
-        [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
-        [RLIMIT_LOCKS] = "LimitLOCKS",
-        [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
-        [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
-        [RLIMIT_NICE] = "LimitNICE",
-        [RLIMIT_RTPRIO] = "LimitRTPRIO",
-        [RLIMIT_RTTIME] = "LimitRTTIME"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(rlimit, int);
-
-/// UNNEEDED by elogind
-#if 0
-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);
-
-bool kexec_loaded(void) {
-       bool loaded = false;
-       char *s;
-
-       if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) {
-               if (s[0] == '1')
-                       loaded = true;
-               free(s);
-       }
-       return loaded;
-}
-
-int prot_from_flags(int flags) {
-
-        switch (flags & O_ACCMODE) {
-
-        case O_RDONLY:
-                return PROT_READ;
-
-        case O_WRONLY:
-                return PROT_WRITE;
-
-        case O_RDWR:
-                return PROT_READ|PROT_WRITE;
-
-        default:
-                return -EINVAL;
-        }
-}
-
-char *format_bytes(char *buf, size_t l, uint64_t t) {
-        unsigned i;
-
-        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
-
-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;
-}
-
-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;
-}
-
-int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) {
-        bool stdout_is_tty, stderr_is_tty;
-        pid_t parent_pid, agent_pid;
-        sigset_t ss, saved_ss;
-        unsigned n, i;
-        va_list ap;
-        char **l;
-
-        assert(pid);
-        assert(path);
-
-        /* Spawns a temporary TTY agent, making sure it goes away when
-         * we go away */
-
-        parent_pid = getpid();
-
-        /* First we temporarily block all signals, so that the new
-         * child has them blocked initially. This way, we can be sure
-         * that SIGTERMs are not lost we might send to the agent. */
-        assert_se(sigfillset(&ss) >= 0);
-        assert_se(sigprocmask(SIG_SETMASK, &ss, &saved_ss) >= 0);
-
-        agent_pid = fork();
-        if (agent_pid < 0) {
-                assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0);
-                return -errno;
-        }
-
-        if (agent_pid != 0) {
-                assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0);
-                *pid = agent_pid;
-                return 0;
-        }
-
-        /* In the child:
-         *
-         * Make sure the agent goes away when the parent dies */
-        if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
-                _exit(EXIT_FAILURE);
-
-        /* Make sure we actually can kill the agent, if we need to, in
-         * case somebody invoked us from a shell script that trapped
-         * SIGTERM or so... */
-        (void) reset_all_signal_handlers();
-        (void) reset_signal_mask();
-
-        /* Check whether our parent died before we were able
-         * to set the death signal and unblock the signals */
-        if (getppid() != parent_pid)
-                _exit(EXIT_SUCCESS);
-
-        /* Don't leak fds to the agent */
-        close_all_fds(except, n_except);
-
-        stdout_is_tty = isatty(STDOUT_FILENO);
-        stderr_is_tty = isatty(STDERR_FILENO);
-
-        if (!stdout_is_tty || !stderr_is_tty) {
-                int fd;
-
-                /* Detach from stdout/stderr. and reopen
-                 * /dev/tty for them. This is important to
-                 * ensure that when systemctl is started via
-                 * popen() or a similar call that expects to
-                 * read EOF we actually do generate EOF and
-                 * not delay this indefinitely by because we
-                 * keep an unused copy of stdin around. */
-                fd = open("/dev/tty", O_WRONLY);
-                if (fd < 0) {
-                        log_error_errno(errno, "Failed to open /dev/tty: %m");
-                        _exit(EXIT_FAILURE);
-                }
-
-                if (!stdout_is_tty)
-                        dup2(fd, STDOUT_FILENO);
-
-                if (!stderr_is_tty)
-                        dup2(fd, STDERR_FILENO);
-
-                if (fd > 2)
-                        close(fd);
-        }
-
-        /* Count arguments */
-        va_start(ap, path);
-        for (n = 0; va_arg(ap, char*); n++)
-                ;
-        va_end(ap);
-
-        /* Allocate strv */
-        l = alloca(sizeof(char *) * (n + 1));
-
-        /* Fill in arguments */
-        va_start(ap, path);
-        for (i = 0; i <= n; i++)
-                l[i] = va_arg(ap, char*);
-        va_end(ap);
-
-        execv(path, l);
-        _exit(EXIT_FAILURE);
-}
-
-/// UNNEEDED by elogind
-#if 0
-int setrlimit_closest(int resource, const struct rlimit *rlim) {
-        struct rlimit highest, fixed;
-
-        assert(rlim);
-
-        if (setrlimit(resource, rlim) >= 0)
-                return 0;
-
-        if (errno != EPERM)
-                return -errno;
-
-        /* So we failed to set the desired setrlimit, then let's try
-         * to get as close as we can */
-        assert_se(getrlimit(resource, &highest) == 0);
-
-        fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max);
-        fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max);
-
-        if (setrlimit(resource, &fixed) < 0)
-                return -errno;
-
-        return 0;
-}
-
-bool http_etag_is_valid(const char *etag) {
-        if (isempty(etag))
-                return false;
-
-        if (!endswith(etag, "\""))
-                return false;
-
-        if (!startswith(etag, "\"") && !startswith(etag, "W/\""))
-                return false;
-
-        return true;
-}
-#endif // 0
-
-bool http_url_is_valid(const char *url) {
-        const char *p;
-
-        if (isempty(url))
-                return false;
-
-        p = startswith(url, "http://");
-        if (!p)
-                p = startswith(url, "https://");
-        if (!p)
-                return false;
-
-        if (isempty(p))
-                return false;
-
-        return ascii_is_valid(p);
-}
-
-bool documentation_url_is_valid(const char *url) {
-        const char *p;
-
-        if (isempty(url))
-                return false;
-
-        if (http_url_is_valid(url))
-                return true;
-
-        p = startswith(url, "file:/");
-        if (!p)
-                p = startswith(url, "info:");
-        if (!p)
-                p = startswith(url, "man:");
-
-        if (isempty(p))
-                return false;
-
-        return ascii_is_valid(p);
-}
-
-bool in_initrd(void) {
-        static int saved = -1;
-        struct statfs s;
-
-        if (saved >= 0)
-                return saved;
-
-        /* We make two checks here:
-         *
-         * 1. the flag file /etc/initrd-release must exist
-         * 2. the root file system must be a memory file system
-         *
-         * The second check is extra paranoia, since misdetecting an
-         * initrd can have bad bad consequences due the initrd
-         * emptying when transititioning to the main systemd.
-         */
-
-        saved = access("/etc/initrd-release", F_OK) >= 0 &&
-                statfs("/", &s) >= 0 &&
-                is_temporary_fs(&s);
-
-        return saved;
-}
-
-int get_home_dir(char **_h) {
-        struct passwd *p;
-        const char *e;
-        char *h;
-        uid_t u;
-
-        assert(_h);
-
-        /* Take the user specified one */
-        e = secure_getenv("HOME");
-        if (e && path_is_absolute(e)) {
-                h = strdup(e);
-                if (!h)
-                        return -ENOMEM;
-
-                *_h = h;
-                return 0;
-        }
-
-        /* Hardcode home directory for root to avoid NSS */
-        u = getuid();
-        if (u == 0) {
-                h = strdup("/root");
-                if (!h)
-                        return -ENOMEM;
-
-                *_h = h;
-                return 0;
-        }
-
-        /* Check the database... */
-        errno = 0;
-        p = getpwuid(u);
-        if (!p)
-                return errno > 0 ? -errno : -ESRCH;
-
-        if (!path_is_absolute(p->pw_dir))
-                return -EINVAL;
-
-        h = strdup(p->pw_dir);
-        if (!h)
-                return -ENOMEM;
-
-        *_h = h;
-        return 0;
-}
-
-/// UNNEEDED by elogind
-#if 0
-int get_shell(char **_s) {
-        struct passwd *p;
-        const char *e;
-        char *s;
-        uid_t u;
-
-        assert(_s);
-
-        /* Take the user specified one */
-        e = getenv("SHELL");
-        if (e) {
-                s = strdup(e);
-                if (!s)
-                        return -ENOMEM;
-
-                *_s = s;
-                return 0;
-        }
-
-        /* Hardcode home directory for root to avoid NSS */
-        u = getuid();
-        if (u == 0) {
-                s = strdup("/bin/sh");
-                if (!s)
-                        return -ENOMEM;
-
-                *_s = s;
-                return 0;
-        }
-
-        /* Check the database... */
-        errno = 0;
-        p = getpwuid(u);
-        if (!p)
-                return errno > 0 ? -errno : -ESRCH;
-
-        if (!path_is_absolute(p->pw_shell))
-                return -EINVAL;
-
-        s = strdup(p->pw_shell);
-        if (!s)
-                return -ENOMEM;
-
-        *_s = s;
-        return 0;
-}
-#endif // 0
-
-bool filename_is_valid(const char *p) {
-
-        if (isempty(p))
-                return false;
-
-        if (strchr(p, '/'))
-                return false;
-
-        if (streq(p, "."))
-                return false;
-
-        if (streq(p, ".."))
-                return false;
-
-        if (strlen(p) > FILENAME_MAX)
-                return false;
-
-        return true;
-}
-
-bool string_is_safe(const char *p) {
-        const char *t;
-
-        if (!p)
-                return false;
-
-        for (t = p; *t; t++) {
-                if (*t > 0 && *t < ' ')
-                        return false;
-
-                if (strchr("\\\"\'\x7f", *t))
-                        return false;
-        }
-
-        return true;
-}
-
-/**
- * Check if a string contains control characters. If 'ok' is non-NULL
- * it may be a string containing additional CCs to be considered OK.
- */
-bool string_has_cc(const char *p, const char *ok) {
-        const char *t;
-
-        assert(p);
-
-        for (t = p; *t; t++) {
-                if (ok && strchr(ok, *t))
-                        continue;
-
-                if (*t > 0 && *t < ' ')
-                        return true;
-
-                if (*t == 127)
-                        return true;
-        }
-
-        return false;
-}
-
-bool path_is_safe(const char *p) {
-
-        if (isempty(p))
-                return false;
-
-        if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../"))
-                return false;
-
-        if (strlen(p)+1 > PATH_MAX)
-                return false;
-
-        /* The following two checks are not really dangerous, but hey, they still are confusing */
-        if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./"))
-                return false;
-
-        if (strstr(p, "//"))
-                return false;
-
-        return true;
-}
-
-/// UNNEEDED by elogind
-#if 0
-/* hey glibc, APIs with callbacks without a user pointer are so useless */
-void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
-                 int (*compar) (const void *, const void *, void *), void *arg) {
-        size_t l, u, idx;
-        const void *p;
-        int comparison;
-
-        l = 0;
-        u = nmemb;
-        while (l < u) {
-                idx = (l + u) / 2;
-                p = (void *)(((const char *) base) + (idx * size));
-                comparison = compar(key, p, arg);
-                if (comparison < 0)
-                        u = idx;
-                else if (comparison > 0)
-                        l = idx + 1;
-                else
-                        return (void *)p;
-        }
-        return NULL;
-}
-
-void init_gettext(void) {
-        setlocale(LC_ALL, "");
-        textdomain(GETTEXT_PACKAGE);
-}
-#endif // 0
-
-bool is_locale_utf8(void) {
-        const char *set;
-        static int cached_answer = -1;
-
-        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];
-}
-
-/// UNNEEDED by elogind
-#if 0
-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;
-}
-
-int on_ac_power(void) {
-        bool found_offline = false, found_online = false;
-        _cleanup_closedir_ DIR *d = NULL;
-
-        d = opendir("/sys/class/power_supply");
-        if (!d)
-                return errno == ENOENT ? true : -errno;
-
-        for (;;) {
-                struct dirent *de;
-                _cleanup_close_ int fd = -1, device = -1;
-                char contents[6];
-                ssize_t n;
-
-                errno = 0;
-                de = readdir(d);
-                if (!de && errno != 0)
-                        return -errno;
-
-                if (!de)
-                        break;
-
-                if (hidden_file(de->d_name))
-                        continue;
-
-                device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY);
-                if (device < 0) {
-                        if (errno == ENOENT || errno == ENOTDIR)
-                                continue;
-
-                        return -errno;
-                }
-
-                fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY);
-                if (fd < 0) {
-                        if (errno == ENOENT)
-                                continue;
-
-                        return -errno;
-                }
-
-                n = read(fd, contents, sizeof(contents));
-                if (n < 0)
-                        return -errno;
-
-                if (n != 6 || memcmp(contents, "Mains\n", 6))
-                        continue;
-
-                safe_close(fd);
-                fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY);
-                if (fd < 0) {
-                        if (errno == ENOENT)
-                                continue;
-
-                        return -errno;
-                }
-
-                n = read(fd, contents, sizeof(contents));
-                if (n < 0)
-                        return -errno;
-
-                if (n != 2 || contents[1] != '\n')
-                        return -EIO;
-
-                if (contents[0] == '1') {
-                        found_online = true;
-                        break;
-                } else if (contents[0] == '0')
-                        found_offline = true;
-                else
-                        return -EIO;
-        }
-
-        return found_online || !found_offline;
-}
-#endif // 0
-
-static int search_and_fopen_internal(const char *path, const char *mode, const char *root, char **search, FILE **_f) {
-        char **i;
-
-        assert(path);
-        assert(mode);
-        assert(_f);
-
-        if (!path_strv_resolve_uniq(search, root))
-                return -ENOMEM;
-
-        STRV_FOREACH(i, search) {
-                _cleanup_free_ char *p = NULL;
-                FILE *f;
-
-                if (root)
-                        p = strjoin(root, *i, "/", path, NULL);
-                else
-                        p = strjoin(*i, "/", path, NULL);
-                if (!p)
-                        return -ENOMEM;
-
-                f = fopen(p, mode);
-                if (f) {
-                        *_f = f;
-                        return 0;
-                }
-
-                if (errno != ENOENT)
-                        return -errno;
-        }
-
-        return -ENOENT;
-}
-
-int search_and_fopen(const char *path, const char *mode, const char *root, const char **search, FILE **_f) {
-        _cleanup_strv_free_ char **copy = NULL;
-
-        assert(path);
-        assert(mode);
-        assert(_f);
-
-        if (path_is_absolute(path)) {
-                FILE *f;
-
-                f = fopen(path, mode);
-                if (f) {
-                        *_f = f;
-                        return 0;
-                }
-
-                return -errno;
-        }
-
-        copy = strv_copy((char**) search);
-        if (!copy)
-                return -ENOMEM;
-
-        return search_and_fopen_internal(path, mode, root, copy, _f);
-}
-
-/// UNNEEDED by elogind
-#if 0
-int search_and_fopen_nulstr(const char *path, const char *mode, const char *root, const char *search, FILE **_f) {
-        _cleanup_strv_free_ char **s = NULL;
-
-        if (path_is_absolute(path)) {
-                FILE *f;
-
-                f = fopen(path, mode);
-                if (f) {
-                        *_f = f;
-                        return 0;
-                }
-
-                return -errno;
-        }
-
-        s = strv_split_nulstr(search);
-        if (!s)
-                return -ENOMEM;
-
-        return search_and_fopen_internal(path, mode, root, s, _f);
-}
-#endif // 0
-
-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;
-}
-
-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;
-}
-
-bool id128_is_valid(const char *s) {
-        size_t i, l;
-
-        l = strlen(s);
-        if (l == 32) {
-
-                /* Simple formatted 128bit hex string */
-
-                for (i = 0; i < l; i++) {
-                        char c = s[i];
-
-                        if (!(c >= '0' && c <= '9') &&
-                            !(c >= 'a' && c <= 'z') &&
-                            !(c >= 'A' && c <= 'Z'))
-                                return false;
-                }
-
-        } else if (l == 36) {
-
-                /* Formatted UUID */
-
-                for (i = 0; i < l; i++) {
-                        char c = s[i];
-
-                        if ((i == 8 || i == 13 || i == 18 || i == 23)) {
-                                if (c != '-')
-                                        return false;
-                        } else {
-                                if (!(c >= '0' && c <= '9') &&
-                                    !(c >= 'a' && c <= 'z') &&
-                                    !(c >= 'A' && c <= 'Z'))
-                                        return false;
-                        }
-                }
-
-        } else
-                return false;
-
-        return true;
-}
-
-/// UNNEEDED by elogind
-#if 0
-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 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) != 0;
-}
-#endif // 0
-
-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;
-
-}
-
-int container_get_leader(const char *machine, pid_t *pid) {
-        _cleanup_free_ char *s = NULL, *class = NULL;
-        const char *p;
-        pid_t leader;
-        int r;
-
-        assert(machine);
-        assert(pid);
-
-        if (!machine_name_is_valid(machine))
-                return -EINVAL;
-
-        p = strjoina("/run/systemd/machines/", machine);
-        r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL);
-        if (r == -ENOENT)
-                return -EHOSTDOWN;
-        if (r < 0)
-                return r;
-        if (!s)
-                return -EIO;
-
-        if (!streq_ptr(class, "container"))
-                return -EIO;
-
-        r = parse_pid(s, &leader);
-        if (r < 0)
-                return r;
-        if (leader <= 1)
-                return -EIO;
-
-        *pid = leader;
-        return 0;
-}
-
-int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd) {
-        _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1, usernsfd = -1;
-        int rfd = -1;
-
-        assert(pid >= 0);
-
-        if (mntns_fd) {
-                const char *mntns;
-
-                mntns = procfs_file_alloca(pid, "ns/mnt");
-                mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
-                if (mntnsfd < 0)
-                        return -errno;
-        }
-
-        if (pidns_fd) {
-                const char *pidns;
-
-                pidns = procfs_file_alloca(pid, "ns/pid");
-                pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
-                if (pidnsfd < 0)
-                        return -errno;
-        }
-
-        if (netns_fd) {
-                const char *netns;
-
-                netns = procfs_file_alloca(pid, "ns/net");
-                netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
-                if (netnsfd < 0)
-                        return -errno;
-        }
-
-        if (userns_fd) {
-                const char *userns;
-
-                userns = procfs_file_alloca(pid, "ns/user");
-                usernsfd = open(userns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
-                if (usernsfd < 0 && errno != ENOENT)
-                        return -errno;
-        }
-
-        if (root_fd) {
-                const char *root;
-
-                root = procfs_file_alloca(pid, "root");
-                rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
-                if (rfd < 0)
-                        return -errno;
-        }
-
-        if (pidns_fd)
-                *pidns_fd = pidnsfd;
-
-        if (mntns_fd)
-                *mntns_fd = mntnsfd;
-
-        if (netns_fd)
-                *netns_fd = netnsfd;
-
-        if (userns_fd)
-                *userns_fd = usernsfd;
-
-        if (root_fd)
-                *root_fd = rfd;
-
-        pidnsfd = mntnsfd = netnsfd = usernsfd = -1;
-
-        return 0;
-}
-
-int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd) {
-        if (userns_fd >= 0) {
-                /* Can't setns to your own userns, since then you could
-                 * escalate from non-root to root in your own namespace, so
-                 * check if namespaces equal before attempting to enter. */
-                _cleanup_free_ char *userns_fd_path = NULL;
-                int r;
-                if (asprintf(&userns_fd_path, "/proc/self/fd/%d", userns_fd) < 0)
-                        return -ENOMEM;
-
-                r = files_same(userns_fd_path, "/proc/self/ns/user");
-                if (r < 0)
-                        return r;
-                if (r)
-                        userns_fd = -1;
-        }
-
-        if (pidns_fd >= 0)
-                if (setns(pidns_fd, CLONE_NEWPID) < 0)
-                        return -errno;
-
-        if (mntns_fd >= 0)
-                if (setns(mntns_fd, CLONE_NEWNS) < 0)
-                        return -errno;
-
-        if (netns_fd >= 0)
-                if (setns(netns_fd, CLONE_NEWNET) < 0)
-                        return -errno;
-
-        if (userns_fd >= 0)
-                if (setns(userns_fd, CLONE_NEWUSER) < 0)
-                        return -errno;
-
-        if (root_fd >= 0) {
-                if (fchdir(root_fd) < 0)
-                        return -errno;
-
-                if (chroot(".") < 0)
-                        return -errno;
-        }
-
-        return reset_uid_gid();
-}
-
-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;
-}
-
-/* This is much like like mkostemp() but is subject to umask(). */
-int mkostemp_safe(char *pattern, int flags) {
-        _cleanup_umask_ mode_t u;
-        int fd;
-
-        assert(pattern);
-
-        u = umask(077);
-
-        fd = mkostemp(pattern, flags);
-        if (fd < 0)
-                return -errno;
-
-        return fd;
-}
-
-/// UNNEEDED by elogind
-#if 0
-int open_tmpfile(const char *path, int flags) {
-        char *p;
-        int fd;
-
-        assert(path);
-
-#ifdef O_TMPFILE
-        /* Try O_TMPFILE first, if it is supported */
-        fd = open(path, flags|O_TMPFILE|O_EXCL, S_IRUSR|S_IWUSR);
-        if (fd >= 0)
-                return fd;
-#endif
-
-        /* Fall back to unguessable name + unlinking */
-        p = strjoina(path, "/systemd-tmp-XXXXXX");
-
-        fd = mkostemp_safe(p, flags);
-        if (fd < 0)
-                return fd;
-
-        unlink(p);
-        return fd;
-}
-#endif // 0
-
-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;
-}
-
-/// UNNEEDED by elogind
-#if 0
-unsigned long personality_from_string(const char *p) {
-
-        /* Parse a personality specifier. We introduce our own
-         * identifiers that indicate specific ABIs, rather than just
-         * hints regarding the register size, since we want to keep
-         * things open for multiple locally supported ABIs for the
-         * same register size. We try to reuse the ABI identifiers
-         * used by libseccomp. */
-
-#if defined(__x86_64__)
-
-        if (streq(p, "x86"))
-                return PER_LINUX32;
-
-        if (streq(p, "x86-64"))
-                return PER_LINUX;
-
-#elif defined(__i386__)
-
-        if (streq(p, "x86"))
-                return PER_LINUX;
-
-#elif defined(__s390x__)
-
-        if (streq(p, "s390"))
-                return PER_LINUX32;
-
-        if (streq(p, "s390x"))
-                return PER_LINUX;
-
-#elif defined(__s390__)
-
-        if (streq(p, "s390"))
-                return PER_LINUX;
-#endif
-
-        return PERSONALITY_INVALID;
-}
-
-const char* personality_to_string(unsigned long p) {
-
-#if defined(__x86_64__)
-
-        if (p == PER_LINUX32)
-                return "x86";
-
-        if (p == PER_LINUX)
-                return "x86-64";
-
-#elif defined(__i386__)
-
-        if (p == PER_LINUX)
-                return "x86";
-
-#elif defined(__s390x__)
-
-        if (p == PER_LINUX)
-                return "s390x";
-
-        if (p == PER_LINUX32)
-                return "s390";
-
-#elif defined(__s390__)
-
-        if (p == PER_LINUX)
-                return "s390";
-
-#endif
-
-        return NULL;
-}
-#endif // 0
-
-uint64_t physical_memory(void) {
-        long mem;
-
-        /* We return this as uint64_t in case we are running as 32bit
-         * process on a 64bit kernel with huge amounts of memory */
-
-        mem = sysconf(_SC_PHYS_PAGES);
-        assert(mem > 0);
-
-        return (uint64_t) mem * (uint64_t) page_size();
-}
-
-/// UNNEEDED by elogind
-#if 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;
-        }
-}
-
-int update_reboot_param_file(const char *param) {
-        int r = 0;
-
-        if (param) {
-                r = write_string_file(REBOOT_PARAM_FILE, param, WRITE_STRING_FILE_CREATE);
-                if (r < 0)
-                        return log_error_errno(r, "Failed to write reboot param to "REBOOT_PARAM_FILE": %m");
-        } else
-                (void) unlink(REBOOT_PARAM_FILE);
-
-        return 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;
-                        }
-
-                }
-        }
-}
-#endif // 0
-
-int fflush_and_check(FILE *f) {
-        assert(f);
-
-        errno = 0;
-        fflush(f);
-
-        if (ferror(f))
-                return errno ? -errno : -EIO;
-
-        return 0;
-}
-
-int tempfn_xxxxxx(const char *p, const char *extra, char **ret) {
-        const char *fn;
-        char *t;
-
-        assert(p);
-        assert(ret);
-
-        /*
-         * Turns this:
-         *         /foo/bar/waldo
-         *
-         * Into this:
-         *         /foo/bar/.#<extra>waldoXXXXXX
-         */
-
-        fn = basename(p);
-        if (!filename_is_valid(fn))
-                return -EINVAL;
-
-        if (extra == NULL)
-                extra = "";
-
-        t = new(char, strlen(p) + 2 + strlen(extra) + 6 + 1);
-        if (!t)
-                return -ENOMEM;
-
-        strcpy(stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn), "XXXXXX");
-
-        *ret = path_kill_slashes(t);
-        return 0;
-}
-
-int tempfn_random(const char *p, const char *extra, char **ret) {
-        const char *fn;
-        char *t, *x;
-        uint64_t u;
-        unsigned i;
-
-        assert(p);
-        assert(ret);
-
-        /*
-         * Turns this:
-         *         /foo/bar/waldo
-         *
-         * Into this:
-         *         /foo/bar/.#<extra>waldobaa2a261115984a9
-         */
-
-        fn = basename(p);
-        if (!filename_is_valid(fn))
-                return -EINVAL;
-
-        if (!extra)
-                extra = "";
-
-        t = new(char, strlen(p) + 2 + strlen(extra) + 16 + 1);
-        if (!t)
-                return -ENOMEM;
-
-        x = stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), extra), fn);
-
-        u = random_u64();
-        for (i = 0; i < 16; i++) {
-                *(x++) = hexchar(u & 0xF);
-                u >>= 4;
-        }
-
-        *x = 0;
-
-        *ret = path_kill_slashes(t);
-        return 0;
-}
-
-/// UNNEEDED by elogind
-#if 0
-int tempfn_random_child(const char *p, const char *extra, char **ret) {
-        char *t, *x;
-        uint64_t u;
-        unsigned i;
-
-        assert(p);
-        assert(ret);
-
-        /* Turns this:
-         *         /foo/bar/waldo
-         * Into this:
-         *         /foo/bar/waldo/.#<extra>3c2b6219aa75d7d0
-         */
-
-        if (!extra)
-                extra = "";
-
-        t = new(char, strlen(p) + 3 + strlen(extra) + 16 + 1);
-        if (!t)
-                return -ENOMEM;
-
-        x = stpcpy(stpcpy(stpcpy(t, p), "/.#"), extra);
-
-        u = random_u64();
-        for (i = 0; i < 16; i++) {
-                *(x++) = hexchar(u & 0xF);
-                u >>= 4;
-        }
-
-        *x = 0;
-
-        *ret = path_kill_slashes(t);
-        return 0;
-}
-
-int take_password_lock(const char *root) {
-
-        struct flock flock = {
-                .l_type = F_WRLCK,
-                .l_whence = SEEK_SET,
-                .l_start = 0,
-                .l_len = 0,
-        };
-
-        const char *path;
-        int fd, r;
-
-        /* This is roughly the same as lckpwdf(), but not as awful. We
-         * don't want to use alarm() and signals, hence we implement
-         * our own trivial version of this.
-         *
-         * Note that shadow-utils also takes per-database locks in
-         * addition to lckpwdf(). However, we don't given that they
-         * are redundant as they they invoke lckpwdf() first and keep
-         * it during everything they do. The per-database locks are
-         * awfully racy, and thus we just won't do them. */
-
-        if (root)
-                path = strjoina(root, "/etc/.pwd.lock");
-        else
-                path = "/etc/.pwd.lock";
-
-        fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0600);
-        if (fd < 0)
-                return -errno;
-
-        r = fcntl(fd, F_SETLKW, &flock);
-        if (r < 0) {
-                safe_close(fd);
-                return -errno;
-        }
-
-        return fd;
-}
-
-int is_symlink(const char *path) {
-        struct stat info;
-
-        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;
-
-        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;
-
-        if (lstat(path, &info) < 0)
-                return -errno;
-
-        return !!(S_ISBLK(info.st_mode) || S_ISCHR(info.st_mode));
-}
-#endif // 0
-
-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;
-        int r;
-
-        enum {
-                START,
-                VALUE,
-                VALUE_ESCAPE,
-                SINGLE_QUOTE,
-                SINGLE_QUOTE_ESCAPE,
-                DOUBLE_QUOTE,
-                DOUBLE_QUOTE_ESCAPE,
-                SEPARATOR,
-        } state = START;
-
-        assert(p);
-        assert(ret);
-
-        if (!separators)
-                separators = WHITESPACE;
-
-        /* Bail early if called after last value or with no input */
-        if (!*p)
-                goto finish_force_terminate;
-
-        /* 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. */
-
-        for (;;) {
-                char c = **p;
-
-                switch (state) {
-
-                case START:
-                        if (flags & EXTRACT_DONT_COALESCE_SEPARATORS)
-                                if (!GREEDY_REALLOC(s, allocated, sz+1))
-                                        return -ENOMEM;
-
-                        if (c == 0)
-                                goto finish_force_terminate;
-                        else if (strchr(separators, c)) {
-                                if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) {
-                                        (*p) ++;
-                                        goto finish_force_next;
-                                }
-                                break;
-                        }
-
-                        /* 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;
-
-                        state = VALUE;
-                        /* fallthrough */
-
-                case VALUE:
-                        if (c == 0)
-                                goto finish_force_terminate;
-                        else if (c == '\'' && (flags & EXTRACT_QUOTES))
-                                state = SINGLE_QUOTE;
-                        else if (c == '\\')
-                                state = VALUE_ESCAPE;
-                        else if (c == '\"' && (flags & EXTRACT_QUOTES))
-                                state = DOUBLE_QUOTE;
-                        else if (strchr(separators, c)) {
-                                if (flags & EXTRACT_DONT_COALESCE_SEPARATORS) {
-                                        (*p) ++;
-                                        goto finish_force_next;
-                                }
-                                state = SEPARATOR;
-                        } else {
-                                if (!GREEDY_REALLOC(s, allocated, sz+2))
-                                        return -ENOMEM;
-
-                                s[sz++] = c;
-                        }
-
-                        break;
-
-                case SINGLE_QUOTE:
-                        if (c == 0) {
-                                if (flags & EXTRACT_RELAX)
-                                        goto finish_force_terminate;
-                                return -EINVAL;
-                        } else if (c == '\'')
-                                state = VALUE;
-                        else if (c == '\\')
-                                state = SINGLE_QUOTE_ESCAPE;
-                        else {
-                                if (!GREEDY_REALLOC(s, allocated, sz+2))
-                                        return -ENOMEM;
-
-                                s[sz++] = c;
-                        }
-
-                        break;
-
-                case DOUBLE_QUOTE:
-                        if (c == 0)
-                                return -EINVAL;
-                        else if (c == '\"')
-                                state = VALUE;
-                        else if (c == '\\')
-                                state = DOUBLE_QUOTE_ESCAPE;
-                        else {
-                                if (!GREEDY_REALLOC(s, allocated, sz+2))
-                                        return -ENOMEM;
-
-                                s[sz++] = c;
-                        }
-
-                        break;
-
-                case SINGLE_QUOTE_ESCAPE:
-                case DOUBLE_QUOTE_ESCAPE:
-                case VALUE_ESCAPE:
-                        if (!GREEDY_REALLOC(s, allocated, sz+7))
-                                return -ENOMEM;
-
-                        if (c == 0) {
-                                if ((flags & EXTRACT_CUNESCAPE_RELAX) &&
-                                    (state == VALUE_ESCAPE || 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;
-                                                goto end_escape;
-                                        }
-                                        return -EINVAL;
-                                }
-
-                                (*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;
-
-end_escape:
-                        state = (state == SINGLE_QUOTE_ESCAPE) ? SINGLE_QUOTE :
-                                (state == DOUBLE_QUOTE_ESCAPE) ? DOUBLE_QUOTE :
-                                VALUE;
-                        break;
-
-                case SEPARATOR:
-                        if (c == 0)
-                                goto finish_force_terminate;
-                        if (!strchr(separators, c))
-                                goto finish;
-                        break;
-                }
-
-                (*p) ++;
-        }
-
-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 && !(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)
-                        log_syntax(unit, LOG_ERR, filename, line, r, "Unbalanced quoting in command line, ignoring: \"%s\"", rvalue);
-                else
-                        log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid escape sequences in command line: \"%s\"", rvalue);
-        }
-
-        return r;
-}
-
-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
-
-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;
-}
-
-/// UNNEEDED by elogind
-#if 0
-int ptsname_malloc(int fd, char **ret) {
-        size_t l = 100;
-
-        assert(fd >= 0);
-        assert(ret);
-
-        for (;;) {
-                char *c;
-
-                c = new(char, l);
-                if (!c)
-                        return -ENOMEM;
-
-                if (ptsname_r(fd, c, l) == 0) {
-                        *ret = c;
-                        return 0;
-                }
-                if (errno != ERANGE) {
-                        free(c);
-                        return -errno;
-                }
-
-                free(c);
-                l *= 2;
-        }
-}
-
-int openpt_in_namespace(pid_t pid, int flags) {
-        _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, usernsfd = -1, rootfd = -1;
-        _cleanup_close_pair_ int pair[2] = { -1, -1 };
-        siginfo_t si;
-        pid_t child;
-        int r;
-
-        assert(pid > 0);
-
-        r = namespace_open(pid, &pidnsfd, &mntnsfd, NULL, &usernsfd, &rootfd);
-        if (r < 0)
-                return r;
-
-        if (socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) < 0)
-                return -errno;
-
-        child = fork();
-        if (child < 0)
-                return -errno;
-
-        if (child == 0) {
-                int master;
-
-                pair[0] = safe_close(pair[0]);
-
-                r = namespace_enter(pidnsfd, mntnsfd, -1, usernsfd, rootfd);
-                if (r < 0)
-                        _exit(EXIT_FAILURE);
-
-                master = posix_openpt(flags|O_NOCTTY|O_CLOEXEC);
-                if (master < 0)
-                        _exit(EXIT_FAILURE);
-
-                if (unlockpt(master) < 0)
-                        _exit(EXIT_FAILURE);
-
-                if (send_one_fd(pair[1], master, 0) < 0)
-                        _exit(EXIT_FAILURE);
-
-                _exit(EXIT_SUCCESS);
-        }
-
-        pair[1] = safe_close(pair[1]);
-
-        r = wait_for_terminate(child, &si);
-        if (r < 0)
-                return r;
-        if (si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS)
-                return -EIO;
-
-        return receive_one_fd(pair[0], 0);
-}
-#endif // 0
-
-ssize_t fgetxattrat_fake(int dirfd, const char *filename, const char *attribute, void *value, size_t size, int flags) {
-        char fn[strlen("/proc/self/fd/") + DECIMAL_STR_MAX(int) + 1];
-        _cleanup_close_ int fd = -1;
-        ssize_t l;
-
-        /* The kernel doesn't have a fgetxattrat() command, hence let's emulate one */
-
-        fd = openat(dirfd, filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_PATH|(flags & AT_SYMLINK_NOFOLLOW ? O_NOFOLLOW : 0));
-        if (fd < 0)
-                return -errno;
-
-        xsprintf(fn, "/proc/self/fd/%i", fd);
-
-        l = getxattr(fn, attribute, value, size);
-        if (l < 0)
-                return -errno;
-
-        return l;
-}
-
-static int parse_crtime(le64_t le, usec_t *usec) {
-        uint64_t u;
-
-        assert(usec);
-
-        u = le64toh(le);
-        if (u == 0 || u == (uint64_t) -1)
-                return -EIO;
-
-        *usec = (usec_t) u;
-        return 0;
-}
-
-int fd_getcrtime(int fd, usec_t *usec) {
-        le64_t le;
-        ssize_t n;
-
-        assert(fd >= 0);
-        assert(usec);
-
-        /* Until Linux gets a real concept of birthtime/creation time,
-         * let's fake one with xattrs */
-
-        n = fgetxattr(fd, "user.crtime_usec", &le, sizeof(le));
-        if (n < 0)
-                return -errno;
-        if (n != sizeof(le))
-                return -EIO;
-
-        return parse_crtime(le, usec);
-}
-
-/// UNNEEDED by elogind
-#if 0
-int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags) {
-        le64_t le;
-        ssize_t n;
-
-        n = fgetxattrat_fake(dirfd, name, "user.crtime_usec", &le, sizeof(le), flags);
-        if (n < 0)
-                return -errno;
-        if (n != sizeof(le))
-                return -EIO;
-
-        return parse_crtime(le, usec);
-}
-
-int path_getcrtime(const char *p, usec_t *usec) {
-        le64_t le;
-        ssize_t n;
-
-        assert(p);
-        assert(usec);
-
-        n = getxattr(p, "user.crtime_usec", &le, sizeof(le));
-        if (n < 0)
-                return -errno;
-        if (n != sizeof(le))
-                return -EIO;
-
-        return parse_crtime(le, usec);
-}
-
-int fd_setcrtime(int fd, usec_t usec) {
-        le64_t le;
-
-        assert(fd >= 0);
-
-        if (usec <= 0)
-                usec = now(CLOCK_REALTIME);
-
-        le = htole64((uint64_t) usec);
-        if (fsetxattr(fd, "user.crtime_usec", &le, sizeof(le), 0) < 0)
-                return -errno;
-
-        return 0;
-}
-
-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;
-}
-
-int chattr_fd(int fd, unsigned value, unsigned mask) {
-        unsigned old_attr, new_attr;
-        struct stat st;
-
-        assert(fd >= 0);
-
-        if (fstat(fd, &st) < 0)
-                return -errno;
-
-        /* Explicitly check whether this is a regular file or
-         * directory. If it is anything else (such as a device node or
-         * fifo), then the ioctl will not hit the file systems but
-         * possibly drivers, where the ioctl might have different
-         * effects. Notably, DRM is using the same ioctl() number. */
-
-        if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode))
-                return -ENOTTY;
-
-        if (mask == 0)
-                return 0;
-
-        if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0)
-                return -errno;
-
-        new_attr = (old_attr & ~mask) | (value & mask);
-        if (new_attr == old_attr)
-                return 0;
-
-        if (ioctl(fd, FS_IOC_SETFLAGS, &new_attr) < 0)
-                return -errno;
-
-        return 1;
-}
-
-int chattr_path(const char *p, unsigned value, unsigned mask) {
-        _cleanup_close_ int fd = -1;
-
-        assert(p);
-
-        if (mask == 0)
-                return 0;
-
-        fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
-        if (fd < 0)
-                return -errno;
-
-        return chattr_fd(fd, value, mask);
-}
-
-int read_attr_fd(int fd, unsigned *ret) {
-        struct stat st;
-
-        assert(fd >= 0);
-
-        if (fstat(fd, &st) < 0)
-                return -errno;
-
-        if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode))
-                return -ENOTTY;
-
-        if (ioctl(fd, FS_IOC_GETFLAGS, ret) < 0)
-                return -errno;
-
-        return 0;
-}
-
-int read_attr_path(const char *p, unsigned *ret) {
-        _cleanup_close_ int fd = -1;
-
-        assert(p);
-        assert(ret);
-
-        fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
-        if (fd < 0)
-                return -errno;
-
-        return read_attr_fd(fd, ret);
-}
-
-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;
-}
-#endif // 0
-
-void sigkill_wait(pid_t *pid) {
-        if (!pid)
-                return;
-        if (*pid <= 1)
-                return;
-
-        if (kill(*pid, SIGKILL) > 0)
-                (void) wait_for_terminate(*pid, NULL);
-}
-
-/// 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
-
-ssize_t string_table_lookup(const char * const *table, size_t len, const char *key) {
-        size_t i;
+                device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY);
+                if (device < 0) {
+                        if (errno == ENOENT || errno == ENOTDIR)
+                                continue;
 
 
-        if (!key)
-                return -1;
+                        return -errno;
+                }
 
 
-        for (i = 0; i < len; ++i)
-                if (streq_ptr(table[i], key))
-                        return (ssize_t) i;
+                fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY);
+                if (fd < 0) {
+                        if (errno == ENOENT)
+                                continue;
 
 
-        return -1;
-}
+                        return -errno;
+                }
 
 
-/// UNNEEDED by elogind
-#if 0
-void cmsg_close_all(struct msghdr *mh) {
-        struct cmsghdr *cmsg;
+                n = read(fd, contents, sizeof(contents));
+                if (n < 0)
+                        return -errno;
 
 
-        assert(mh);
+                if (n != 6 || memcmp(contents, "Mains\n", 6))
+                        continue;
 
 
-        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));
-}
+                safe_close(fd);
+                fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY);
+                if (fd < 0) {
+                        if (errno == ENOENT)
+                                continue;
 
 
-int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath) {
-        struct stat buf;
-        int ret;
+                        return -errno;
+                }
 
 
-        ret = renameat2(olddirfd, oldpath, newdirfd, newpath, RENAME_NOREPLACE);
-        if (ret >= 0)
-                return 0;
+                n = read(fd, contents, sizeof(contents));
+                if (n < 0)
+                        return -errno;
 
 
-        /* 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;
+                if (n != 2 || contents[1] != '\n')
+                        return -EIO;
 
 
-        /* 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 (contents[0] == '1') {
+                        found_online = true;
+                        break;
+                } else if (contents[0] == '0')
+                        found_offline = true;
+                else
+                        return -EIO;
         }
 
         }
 
-        /* If it is not a directory, use the link()/unlink() fallback. */
-        ret = linkat(olddirfd, oldpath, newdirfd, newpath, 0);
-        if (ret < 0)
-                return -errno;
+        return found_online || !found_offline;
+}
 
 
-        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;
-        }
+bool id128_is_valid(const char *s) {
+        size_t i, l;
 
 
-        return 0;
-}
+        l = strlen(s);
+        if (l == 32) {
 
 
-static char *strcpy_backslash_escaped(char *t, const char *s, const char *bad) {
-        assert(bad);
+                /* Simple formatted 128bit hex string */
 
 
-        for (; *s; s++) {
-                if (*s == '\\' || strchr(bad, *s))
-                        *(t++) = '\\';
+                for (i = 0; i < l; i++) {
+                        char c = s[i];
 
 
-                *(t++) = *s;
-        }
+                        if (!(c >= '0' && c <= '9') &&
+                            !(c >= 'a' && c <= 'z') &&
+                            !(c >= 'A' && c <= 'Z'))
+                                return false;
+                }
 
 
-        return t;
-}
+        } else if (l == 36) {
+
+                /* Formatted UUID */
 
 
-char *shell_escape(const char *s, const char *bad) {
-        char *r, *t;
+                for (i = 0; i < l; i++) {
+                        char c = s[i];
 
 
-        r = new(char, strlen(s)*2+1);
-        if (!r)
-                return NULL;
+                        if ((i == 8 || i == 13 || i == 18 || i == 23)) {
+                                if (c != '-')
+                                        return false;
+                        } else {
+                                if (!(c >= '0' && c <= '9') &&
+                                    !(c >= 'a' && c <= 'z') &&
+                                    !(c >= 'A' && c <= 'Z'))
+                                        return false;
+                        }
+                }
 
 
-        t = strcpy_backslash_escaped(r, s, bad);
-        *t = 0;
+        } else
+                return false;
 
 
-        return r;
+        return true;
 }
 
 }
 
-char *shell_maybe_quote(const char *s) {
+int container_get_leader(const char *machine, pid_t *pid) {
+        _cleanup_free_ char *s = NULL, *class = NULL;
         const char *p;
         const char *p;
-        char *r, *t;
+        pid_t leader;
+        int r;
 
 
-        assert(s);
+        assert(machine);
+        assert(pid);
 
 
-        /* Encloses a string in double quotes if necessary to make it
-         * OK as shell string. */
+        if (!machine_name_is_valid(machine))
+                return -EINVAL;
 
 
-        for (p = s; *p; p++)
-                if (*p <= ' ' ||
-                    *p >= 127 ||
-                    strchr(SHELL_NEED_QUOTES, *p))
-                        break;
+        p = strjoina("/run/systemd/machines/", machine);
+        r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL);
+        if (r == -ENOENT)
+                return -EHOSTDOWN;
+        if (r < 0)
+                return r;
+        if (!s)
+                return -EIO;
 
 
-        if (!*p)
-                return strdup(s);
+        if (!streq_ptr(class, "container"))
+                return -EIO;
 
 
-        r = new(char, 1+strlen(s)*2+1+1);
-        if (!r)
-                return NULL;
+        r = parse_pid(s, &leader);
+        if (r < 0)
+                return r;
+        if (leader <= 1)
+                return -EIO;
 
 
-        t = r;
-        *(t++) = '"';
-        t = mempcpy(t, s, p - s);
+        *pid = leader;
+        return 0;
+}
 
 
-        t = strcpy_backslash_escaped(t, p, SHELL_NEED_ESCAPE);
+int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd) {
+        _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1, usernsfd = -1;
+        int rfd = -1;
 
 
-        *(t++)= '"';
-        *t = 0;
+        assert(pid >= 0);
 
 
-        return r;
-}
-#endif // 0
+        if (mntns_fd) {
+                const char *mntns;
 
 
-int parse_mode(const char *s, mode_t *ret) {
-        char *x;
-        long l;
+                mntns = procfs_file_alloca(pid, "ns/mnt");
+                mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
+                if (mntnsfd < 0)
+                        return -errno;
+        }
 
 
-        assert(s);
-        assert(ret);
+        if (pidns_fd) {
+                const char *pidns;
 
 
-        errno = 0;
-        l = strtol(s, &x, 8);
-        if (errno != 0)
-                return -errno;
+                pidns = procfs_file_alloca(pid, "ns/pid");
+                pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
+                if (pidnsfd < 0)
+                        return -errno;
+        }
 
 
-        if (!x || x == s || *x)
-                return -EINVAL;
-        if (l < 0 || l  > 07777)
-                return -ERANGE;
+        if (netns_fd) {
+                const char *netns;
 
 
-        *ret = (mode_t) l;
-        return 0;
-}
+                netns = procfs_file_alloca(pid, "ns/net");
+                netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
+                if (netnsfd < 0)
+                        return -errno;
+        }
 
 
-/// UNNEEDED by elogind
-#if 0
-int mount_move_root(const char *path) {
-        assert(path);
+        if (userns_fd) {
+                const char *userns;
 
 
-        if (chdir(path) < 0)
-                return -errno;
+                userns = procfs_file_alloca(pid, "ns/user");
+                usernsfd = open(userns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
+                if (usernsfd < 0 && errno != ENOENT)
+                        return -errno;
+        }
 
 
-        if (mount(path, "/", NULL, MS_MOVE, NULL) < 0)
-                return -errno;
+        if (root_fd) {
+                const char *root;
 
 
-        if (chroot(".") < 0)
-                return -errno;
+                root = procfs_file_alloca(pid, "root");
+                rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
+                if (rfd < 0)
+                        return -errno;
+        }
 
 
-        if (chdir("/") < 0)
-                return -errno;
+        if (pidns_fd)
+                *pidns_fd = pidnsfd;
 
 
-        return 0;
-}
-#endif // 0
+        if (mntns_fd)
+                *mntns_fd = mntnsfd;
 
 
-int reset_uid_gid(void) {
+        if (netns_fd)
+                *netns_fd = netnsfd;
 
 
-        if (setgroups(0, NULL) < 0)
-                return -errno;
+        if (userns_fd)
+                *userns_fd = usernsfd;
 
 
-        if (setresgid(0, 0, 0) < 0)
-                return -errno;
+        if (root_fd)
+                *root_fd = rfd;
 
 
-        if (setresuid(0, 0, 0) < 0)
-                return -errno;
+        pidnsfd = mntnsfd = netnsfd = usernsfd = -1;
 
         return 0;
 }
 
 
         return 0;
 }
 
-int getxattr_malloc(const char *path, const char *name, char **value, bool allow_symlink) {
-        char *v;
-        size_t l;
-        ssize_t n;
-
-        assert(path);
-        assert(name);
-        assert(value);
-
-        for (l = 100; ; l = (size_t) n + 1) {
-                v = new0(char, l);
-                if (!v)
+int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd) {
+        if (userns_fd >= 0) {
+                /* Can't setns to your own userns, since then you could
+                 * escalate from non-root to root in your own namespace, so
+                 * check if namespaces equal before attempting to enter. */
+                _cleanup_free_ char *userns_fd_path = NULL;
+                int r;
+                if (asprintf(&userns_fd_path, "/proc/self/fd/%d", userns_fd) < 0)
                         return -ENOMEM;
 
                         return -ENOMEM;
 
-                if (allow_symlink)
-                        n = lgetxattr(path, name, v, l);
-                else
-                        n = getxattr(path, name, v, l);
-
-                if (n >= 0 && (size_t) n < l) {
-                        *value = v;
-                        return n;
-                }
-
-                free(v);
+                r = files_same(userns_fd_path, "/proc/self/ns/user");
+                if (r < 0)
+                        return r;
+                if (r)
+                        userns_fd = -1;
+        }
 
 
-                if (n < 0 && errno != ERANGE)
+        if (pidns_fd >= 0)
+                if (setns(pidns_fd, CLONE_NEWPID) < 0)
                         return -errno;
 
                         return -errno;
 
-                if (allow_symlink)
-                        n = lgetxattr(path, name, NULL, 0);
-                else
-                        n = getxattr(path, name, NULL, 0);
-                if (n < 0)
+        if (mntns_fd >= 0)
+                if (setns(mntns_fd, CLONE_NEWNS) < 0)
                         return -errno;
                         return -errno;
-        }
-}
-
-int fgetxattr_malloc(int fd, const char *name, char **value) {
-        char *v;
-        size_t l;
-        ssize_t n;
-
-        assert(fd >= 0);
-        assert(name);
-        assert(value);
 
 
-        for (l = 100; ; l = (size_t) n + 1) {
-                v = new0(char, l);
-                if (!v)
-                        return -ENOMEM;
-
-                n = fgetxattr(fd, name, v, l);
-
-                if (n >= 0 && (size_t) n < l) {
-                        *value = v;
-                        return n;
-                }
+        if (netns_fd >= 0)
+                if (setns(netns_fd, CLONE_NEWNET) < 0)
+                        return -errno;
 
 
-                free(v);
+        if (userns_fd >= 0)
+                if (setns(userns_fd, CLONE_NEWUSER) < 0)
+                        return -errno;
 
 
-                if (n < 0 && errno != ERANGE)
+        if (root_fd >= 0) {
+                if (fchdir(root_fd) < 0)
                         return -errno;
 
                         return -errno;
 
-                n = fgetxattr(fd, name, NULL, 0);
-                if (n < 0)
+                if (chroot(".") < 0)
                         return -errno;
         }
                         return -errno;
         }
-}
-
-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;
+        return reset_uid_gid();
 }
 
 }
 
-/// UNNEEDED by elogind
-#if 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;
+uint64_t physical_memory(void) {
+        long mem;
 
 
-        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;
-                }
-        }
+        /* We return this as uint64_t in case we are running as 32bit
+         * process on a 64bit kernel with huge amounts of memory */
 
 
-        if (!found) {
-                cmsg_close_all(&mh);
-                return -EIO;
-        }
+        mem = sysconf(_SC_PHYS_PAGES);
+        assert(mem > 0);
 
 
-        return *(int*) CMSG_DATA(found);
+        return (uint64_t) mem * (uint64_t) page_size();
 }
 
 }
 
-void nop_signal_handler(int sig) {
-        /* nothing here */
+int update_reboot_param_file(const char *param) {
+        int r = 0;
+
+        if (param) {
+                r = write_string_file(REBOOT_PARAM_FILE, param, WRITE_STRING_FILE_CREATE);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to write reboot param to "REBOOT_PARAM_FILE": %m");
+        } else
+                (void) unlink(REBOOT_PARAM_FILE);
+
+        return 0;
 }
 }
-#endif // 0
 
 int version(void) {
         puts(PACKAGE_STRING "\n"
              SYSTEMD_FEATURES);
         return 0;
 }
 
 int version(void) {
         puts(PACKAGE_STRING "\n"
              SYSTEMD_FEATURES);
         return 0;
 }
-
-/// UNNEEDED by elogind
-#if 0
-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;
-}
-#endif // 0