D-Bus 1.15.4
dbus-sysdeps-util-unix.c
1/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2/* dbus-sysdeps-util-unix.c Would be in dbus-sysdeps-unix.c, but not used in libdbus
3 *
4 * Copyright (C) 2002, 2003, 2004, 2005 Red Hat, Inc.
5 * Copyright (C) 2003 CodeFactory AB
6 *
7 * SPDX-License-Identifier: AFL-2.1 OR GPL-2.0-or-later
8 *
9 * Licensed under the Academic Free License version 2.1
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 *
25 */
26
27#include <config.h>
28#include "dbus-sysdeps.h"
29#include "dbus-sysdeps-unix.h"
30#include "dbus-internals.h"
31#include "dbus-list.h"
32#include "dbus-pipe.h"
33#include "dbus-protocol.h"
34#include "dbus-string.h"
35#define DBUS_USERDB_INCLUDES_PRIVATE 1
36#include "dbus-userdb.h"
37#include "dbus-test.h"
38
39#include <sys/types.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <signal.h>
44#include <unistd.h>
45#include <stdio.h>
46#include <errno.h>
47#include <fcntl.h>
48#include <limits.h>
49#include <sys/stat.h>
50#ifdef HAVE_SYS_RESOURCE_H
51#include <sys/resource.h>
52#endif
53#include <grp.h>
54#include <sys/socket.h>
55#include <dirent.h>
56#include <sys/un.h>
57
58#ifdef HAVE_SYS_PRCTL_H
59#include <sys/prctl.h>
60#endif
61
62#ifdef HAVE_SYSTEMD
63#include <systemd/sd-daemon.h>
64#endif
65
66#ifndef O_BINARY
67#define O_BINARY 0
68#endif
69
87 DBusPipe *print_pid_pipe,
88 DBusError *error,
89 dbus_bool_t keep_umask)
90{
91 const char *s;
92 pid_t child_pid;
93 DBusEnsureStandardFdsFlags flags;
94
95 _dbus_verbose ("Becoming a daemon...\n");
96
97 _dbus_verbose ("chdir to /\n");
98 if (chdir ("/") < 0)
99 {
101 "Could not chdir() to root directory");
102 return FALSE;
103 }
104
105 _dbus_verbose ("forking...\n");
106
107 /* Make sure our output buffers aren't redundantly printed by both the
108 * parent and the child */
109 fflush (stdout);
110 fflush (stderr);
111
112 switch ((child_pid = fork ()))
113 {
114 case -1:
115 _dbus_verbose ("fork failed\n");
117 "Failed to fork daemon: %s", _dbus_strerror (errno));
118 return FALSE;
119 break;
120
121 case 0:
122 _dbus_verbose ("in child, closing std file descriptors\n");
123
124 flags = DBUS_FORCE_STDIN_NULL | DBUS_FORCE_STDOUT_NULL;
125 s = _dbus_getenv ("DBUS_DEBUG_OUTPUT");
126
127 if (s == NULL || *s == '\0')
128 flags |= DBUS_FORCE_STDERR_NULL;
129 else
130 _dbus_verbose ("keeping stderr open due to DBUS_DEBUG_OUTPUT\n");
131
132 if (!_dbus_ensure_standard_fds (flags, &s))
133 {
134 _dbus_warn ("%s: %s", s, _dbus_strerror (errno));
135 _exit (1);
136 }
137
138 if (!keep_umask)
139 {
140 /* Get a predictable umask */
141 _dbus_verbose ("setting umask\n");
142 umask (022);
143 }
144
145 _dbus_verbose ("calling setsid()\n");
146 if (setsid () == -1)
147 _dbus_assert_not_reached ("setsid() failed");
148
149 break;
150
151 default:
152 if (!_dbus_write_pid_to_file_and_pipe (pidfile, print_pid_pipe,
153 child_pid, error))
154 {
155 _dbus_verbose ("pid file or pipe write failed: %s\n",
156 error->message);
157 kill (child_pid, SIGTERM);
158 return FALSE;
159 }
160
161 _dbus_verbose ("parent exiting\n");
162 _exit (0);
163 break;
164 }
165
166 return TRUE;
167}
168
169
178static dbus_bool_t
179_dbus_write_pid_file (const DBusString *filename,
180 unsigned long pid,
181 DBusError *error)
182{
183 const char *cfilename;
184 int fd;
185 FILE *f;
186
187 cfilename = _dbus_string_get_const_data (filename);
188
189 fd = open (cfilename, O_WRONLY|O_CREAT|O_EXCL|O_BINARY, 0644);
190
191 if (fd < 0)
192 {
194 "Failed to open \"%s\": %s", cfilename,
195 _dbus_strerror (errno));
196 return FALSE;
197 }
198
199 if ((f = fdopen (fd, "w")) == NULL)
200 {
202 "Failed to fdopen fd %d: %s", fd, _dbus_strerror (errno));
203 _dbus_close (fd, NULL);
204 return FALSE;
205 }
206
207 if (fprintf (f, "%lu\n", pid) < 0)
208 {
210 "Failed to write to \"%s\": %s", cfilename,
211 _dbus_strerror (errno));
212
213 fclose (f);
214 return FALSE;
215 }
216
217 if (fclose (f) == EOF)
218 {
220 "Failed to close \"%s\": %s", cfilename,
221 _dbus_strerror (errno));
222 return FALSE;
223 }
224
225 return TRUE;
226}
227
241 DBusPipe *print_pid_pipe,
242 dbus_pid_t pid_to_write,
243 DBusError *error)
244{
245 if (pidfile)
246 {
247 _dbus_verbose ("writing pid file %s\n", _dbus_string_get_const_data (pidfile));
248 if (!_dbus_write_pid_file (pidfile,
249 pid_to_write,
250 error))
251 {
252 _dbus_verbose ("pid file write failed\n");
253 _DBUS_ASSERT_ERROR_IS_SET(error);
254 return FALSE;
255 }
256 }
257 else
258 {
259 _dbus_verbose ("No pid file requested\n");
260 }
261
262 if (print_pid_pipe != NULL && _dbus_pipe_is_valid (print_pid_pipe))
263 {
264 DBusString pid;
265 int bytes;
266
267 _dbus_verbose ("writing our pid to pipe %d\n",
268 print_pid_pipe->fd);
269
270 if (!_dbus_string_init (&pid))
271 {
272 _DBUS_SET_OOM (error);
273 return FALSE;
274 }
275
276 if (!_dbus_string_append_int (&pid, pid_to_write) ||
277 !_dbus_string_append (&pid, "\n"))
278 {
279 _dbus_string_free (&pid);
280 _DBUS_SET_OOM (error);
281 return FALSE;
282 }
283
284 bytes = _dbus_string_get_length (&pid);
285 if (_dbus_pipe_write (print_pid_pipe, &pid, 0, bytes, error) != bytes)
286 {
287 /* _dbus_pipe_write sets error only on failure, not short write */
288 if (error != NULL && !dbus_error_is_set(error))
289 {
291 "Printing message bus PID: did not write enough bytes\n");
292 }
293 _dbus_string_free (&pid);
294 return FALSE;
295 }
296
297 _dbus_string_free (&pid);
298 }
299 else
300 {
301 _dbus_verbose ("No pid pipe to write to\n");
302 }
303
304 return TRUE;
305}
306
314_dbus_verify_daemon_user (const char *user)
315{
316 DBusString u;
317
318 _dbus_string_init_const (&u, user);
319
321}
322
323
324/* The HAVE_LIBAUDIT case lives in selinux.c */
325#ifndef HAVE_LIBAUDIT
335 DBusError *error)
336{
337 dbus_uid_t uid;
338 dbus_gid_t gid;
339 DBusString u;
340
341 _dbus_string_init_const (&u, user);
342
343 if (!_dbus_get_user_id_and_primary_group (&u, &uid, &gid))
344 {
346 "User '%s' does not appear to exist?",
347 user);
348 return FALSE;
349 }
350
351 /* setgroups() only works if we are a privileged process,
352 * so we don't return error on failure; the only possible
353 * failure is that we don't have perms to do it.
354 *
355 * not sure this is right, maybe if setuid()
356 * is going to work then setgroups() should also work.
357 */
358 if (setgroups (0, NULL) < 0)
359 _dbus_warn ("Failed to drop supplementary groups: %s",
360 _dbus_strerror (errno));
361
362 /* Set GID first, or the setuid may remove our permission
363 * to change the GID
364 */
365 if (setgid (gid) < 0)
366 {
368 "Failed to set GID to %lu: %s", gid,
369 _dbus_strerror (errno));
370 return FALSE;
371 }
372
373 if (setuid (uid) < 0)
374 {
376 "Failed to set UID to %lu: %s", uid,
377 _dbus_strerror (errno));
378 return FALSE;
379 }
380
381 return TRUE;
382}
383#endif /* !HAVE_LIBAUDIT */
384
385#ifdef HAVE_SETRLIMIT
386
387/* We assume that if we have setrlimit, we also have getrlimit and
388 * struct rlimit.
389 */
390
391struct DBusRLimit {
392 struct rlimit lim;
393};
394
395DBusRLimit *
396_dbus_rlimit_save_fd_limit (DBusError *error)
397{
398 DBusRLimit *self;
399
400 self = dbus_new0 (DBusRLimit, 1);
401
402 if (self == NULL)
403 {
404 _DBUS_SET_OOM (error);
405 return NULL;
406 }
407
408 if (getrlimit (RLIMIT_NOFILE, &self->lim) < 0)
409 {
411 "Failed to get fd limit: %s", _dbus_strerror (errno));
412 dbus_free (self);
413 return NULL;
414 }
415
416 return self;
417}
418
419/* Enough fds that we shouldn't run out, even if several uids work
420 * together to carry out a denial-of-service attack. This happens to be
421 * the same number that systemd < 234 would normally use. */
422#define ENOUGH_FDS 65536
423
425_dbus_rlimit_raise_fd_limit (DBusError *error)
426{
427 struct rlimit old, lim;
428
429 if (getrlimit (RLIMIT_NOFILE, &lim) < 0)
430 {
432 "Failed to get fd limit: %s", _dbus_strerror (errno));
433 return FALSE;
434 }
435
436 old = lim;
437
438 if (getuid () == 0)
439 {
440 /* We are privileged, so raise the soft limit to at least
441 * ENOUGH_FDS, and the hard limit to at least the desired soft
442 * limit. This assumes we can exercise CAP_SYS_RESOURCE on Linux,
443 * or other OSs' equivalents. */
444 if (lim.rlim_cur != RLIM_INFINITY &&
445 lim.rlim_cur < ENOUGH_FDS)
446 lim.rlim_cur = ENOUGH_FDS;
447
448 if (lim.rlim_max != RLIM_INFINITY &&
449 lim.rlim_max < lim.rlim_cur)
450 lim.rlim_max = lim.rlim_cur;
451 }
452
453 /* Raise the soft limit to match the hard limit, which we can do even
454 * if we are unprivileged. In particular, systemd >= 240 will normally
455 * set rlim_cur to 1024 and rlim_max to 512*1024, recent Debian
456 * versions end up setting rlim_cur to 1024 and rlim_max to 1024*1024,
457 * and older and non-systemd Linux systems would typically set rlim_cur
458 * to 1024 and rlim_max to 4096. */
459 if (lim.rlim_max == RLIM_INFINITY || lim.rlim_cur < lim.rlim_max)
460 {
461#if defined(__APPLE__) && defined(__MACH__)
462 /* macOS 10.5 and above no longer allows RLIM_INFINITY for rlim_cur */
463 lim.rlim_cur = MIN (OPEN_MAX, lim.rlim_max);
464#else
465 lim.rlim_cur = lim.rlim_max;
466#endif
467 }
468
469 /* Early-return if there is nothing to do. */
470 if (lim.rlim_max == old.rlim_max &&
471 lim.rlim_cur == old.rlim_cur)
472 return TRUE;
473
474 if (setrlimit (RLIMIT_NOFILE, &lim) < 0)
475 {
477 "Failed to set fd limit to %lu: %s",
478 (unsigned long) lim.rlim_cur,
479 _dbus_strerror (errno));
480 return FALSE;
481 }
482
483 return TRUE;
484}
485
487_dbus_rlimit_restore_fd_limit (DBusRLimit *saved,
488 DBusError *error)
489{
490 if (setrlimit (RLIMIT_NOFILE, &saved->lim) < 0)
491 {
493 "Failed to restore old fd limit: %s",
494 _dbus_strerror (errno));
495 return FALSE;
496 }
497
498 return TRUE;
499}
500
501#else /* !HAVE_SETRLIMIT */
502
503static void
504fd_limit_not_supported (DBusError *error)
505{
507 "cannot change fd limit on this platform");
508}
509
510DBusRLimit *
511_dbus_rlimit_save_fd_limit (DBusError *error)
512{
513 fd_limit_not_supported (error);
514 return NULL;
515}
516
518_dbus_rlimit_raise_fd_limit (DBusError *error)
519{
520 fd_limit_not_supported (error);
521 return FALSE;
522}
523
525_dbus_rlimit_restore_fd_limit (DBusRLimit *saved,
526 DBusError *error)
527{
528 fd_limit_not_supported (error);
529 return FALSE;
530}
531
532#endif
533
534void
535_dbus_rlimit_free (DBusRLimit *lim)
536{
537 dbus_free (lim);
538}
539
545void
547 DBusSignalHandler handler)
548{
549 struct sigaction act;
550 sigset_t empty_mask;
551
552 sigemptyset (&empty_mask);
553 act.sa_handler = handler;
554 act.sa_mask = empty_mask;
555 act.sa_flags = 0;
556 sigaction (sig, &act, NULL);
557}
558
565_dbus_file_exists (const char *file)
566{
567 return (access (file, F_OK) == 0);
568}
569
578{
579 if (_dbus_string_get_length (filename) > 0)
580 return _dbus_string_get_byte (filename, 0) == '/';
581 else
582 return FALSE;
583}
584
594_dbus_stat (const DBusString *filename,
595 DBusStat *statbuf,
596 DBusError *error)
597{
598 const char *filename_c;
599 struct stat sb;
600
601 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
602
603 filename_c = _dbus_string_get_const_data (filename);
604
605 if (stat (filename_c, &sb) < 0)
606 {
608 "%s", _dbus_strerror (errno));
609 return FALSE;
610 }
611
612 statbuf->mode = sb.st_mode;
613 statbuf->nlink = sb.st_nlink;
614 statbuf->uid = sb.st_uid;
615 statbuf->gid = sb.st_gid;
616 statbuf->size = sb.st_size;
617 statbuf->atime = sb.st_atime;
618 statbuf->mtime = sb.st_mtime;
619 statbuf->ctime = sb.st_ctime;
620
621 return TRUE;
622}
623
624
629{
630 DIR *d;
632};
633
643 DBusError *error)
644{
645 DIR *d;
646 DBusDirIter *iter;
647 const char *filename_c;
648
649 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
650
651 filename_c = _dbus_string_get_const_data (filename);
652
653 d = opendir (filename_c);
654 if (d == NULL)
655 {
657 "Failed to read directory \"%s\": %s",
658 filename_c,
659 _dbus_strerror (errno));
660 return NULL;
661 }
662 iter = dbus_new0 (DBusDirIter, 1);
663 if (iter == NULL)
664 {
665 closedir (d);
667 "Could not allocate memory for directory iterator");
668 return NULL;
669 }
670
671 iter->d = d;
672
673 return iter;
674}
675
691 DBusString *filename,
692 DBusError *error)
693{
694 struct dirent *ent;
695 int err;
696
697 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
698
699 again:
700 errno = 0;
701 ent = readdir (iter->d);
702
703 if (!ent)
704 {
705 err = errno;
706
707 if (err != 0)
708 dbus_set_error (error,
710 "%s", _dbus_strerror (err));
711
712 return FALSE;
713 }
714 else if (ent->d_name[0] == '.' &&
715 (ent->d_name[1] == '\0' ||
716 (ent->d_name[1] == '.' && ent->d_name[2] == '\0')))
717 goto again;
718 else
719 {
720 _dbus_string_set_length (filename, 0);
721 if (!_dbus_string_append (filename, ent->d_name))
722 {
724 "No memory to read directory entry");
725 return FALSE;
726 }
727 else
728 {
729 return TRUE;
730 }
731 }
732}
733
737void
739{
740 closedir (iter->d);
741 dbus_free (iter);
742}
743
744static dbus_bool_t
745fill_user_info_from_group (struct group *g,
746 DBusGroupInfo *info,
747 DBusError *error)
748{
749 _dbus_assert (g->gr_name != NULL);
750
751 info->gid = g->gr_gid;
752 info->groupname = _dbus_strdup (g->gr_name);
753
754 /* info->members = dbus_strdupv (g->gr_mem) */
755
756 if (info->groupname == NULL)
757 {
759 return FALSE;
760 }
761
762 return TRUE;
763}
764
765static dbus_bool_t
766fill_group_info (DBusGroupInfo *info,
767 dbus_gid_t gid,
768 const DBusString *groupname,
769 DBusError *error)
770{
771 const char *group_c_str;
772
773 _dbus_assert (groupname != NULL || gid != DBUS_GID_UNSET);
774 _dbus_assert (groupname == NULL || gid == DBUS_GID_UNSET);
775
776 if (groupname)
777 group_c_str = _dbus_string_get_const_data (groupname);
778 else
779 group_c_str = NULL;
780
781 /* For now assuming that the getgrnam() and getgrgid() flavors
782 * always correspond to the pwnam flavors, if not we have
783 * to add more configure checks.
784 */
785
786#ifdef HAVE_GETPWNAM_R
787 {
788 struct group *g;
789 int result;
790 size_t buflen;
791 char *buf;
792 struct group g_str;
793 dbus_bool_t b;
794
795 /* retrieve maximum needed size for buf */
796 buflen = sysconf (_SC_GETGR_R_SIZE_MAX);
797
798 /* sysconf actually returns a long, but everything else expects size_t,
799 * so just recast here.
800 * https://bugs.freedesktop.org/show_bug.cgi?id=17061
801 */
802 if ((long) buflen <= 0)
803 buflen = 1024;
804
805 result = -1;
806 while (1)
807 {
808 buf = dbus_malloc (buflen);
809 if (buf == NULL)
810 {
812 return FALSE;
813 }
814
815 g = NULL;
816 if (group_c_str)
817 result = getgrnam_r (group_c_str, &g_str, buf, buflen,
818 &g);
819 else
820 result = getgrgid_r (gid, &g_str, buf, buflen,
821 &g);
822 /* Try a bigger buffer if ERANGE was returned:
823 https://bugs.freedesktop.org/show_bug.cgi?id=16727
824 */
825 if (result == ERANGE && buflen < 512 * 1024)
826 {
827 dbus_free (buf);
828 buflen *= 2;
829 }
830 else
831 {
832 break;
833 }
834 }
835
836 if (result == 0 && g == &g_str)
837 {
838 b = fill_user_info_from_group (g, info, error);
839 dbus_free (buf);
840 return b;
841 }
842 else
843 {
845 "Group %s unknown or failed to look it up\n",
846 group_c_str ? group_c_str : "???");
847 dbus_free (buf);
848 return FALSE;
849 }
850 }
851#else /* ! HAVE_GETPWNAM_R */
852 {
853 /* I guess we're screwed on thread safety here */
854 struct group *g;
855
856#warning getpwnam_r() not available, please report this to the dbus maintainers with details of your OS
857
858 g = getgrnam (group_c_str);
859
860 if (g != NULL)
861 {
862 return fill_user_info_from_group (g, info, error);
863 }
864 else
865 {
867 "Group %s unknown or failed to look it up\n",
868 group_c_str ? group_c_str : "???");
869 return FALSE;
870 }
871 }
872#endif /* ! HAVE_GETPWNAM_R */
873}
874
886 const DBusString *groupname,
887 DBusError *error)
888{
889 return fill_group_info (info, DBUS_GID_UNSET,
890 groupname, error);
891
892}
893
905 dbus_gid_t gid,
906 DBusError *error)
907{
908 return fill_group_info (info, gid, NULL, error);
909}
910
921 dbus_uid_t *uid_p)
922{
923 return _dbus_get_user_id (username, uid_p);
924
925}
926
937 dbus_gid_t *gid_p)
938{
939 return _dbus_get_group_id (groupname, gid_p);
940}
941
954 dbus_gid_t **group_ids,
955 int *n_group_ids)
956{
957 return _dbus_groups_from_uid (uid, group_ids, n_group_ids);
958}
959
971 DBusError *error)
972{
973 return _dbus_is_console_user (uid, error);
974
975}
976
986{
987 return uid == _dbus_geteuid ();
988}
989
998_dbus_windows_user_is_process_owner (const char *windows_sid)
999{
1000 return FALSE;
1001}
1002 /* End of DBusInternalsUtils functions */
1004
1018 DBusString *dirname)
1019{
1020 int sep;
1021
1022 _dbus_assert (filename != dirname);
1023 _dbus_assert (filename != NULL);
1024 _dbus_assert (dirname != NULL);
1025
1026 /* Ignore any separators on the end */
1027 sep = _dbus_string_get_length (filename);
1028 if (sep == 0)
1029 return _dbus_string_append (dirname, "."); /* empty string passed in */
1030
1031 while (sep > 0 && _dbus_string_get_byte (filename, sep - 1) == '/')
1032 --sep;
1033
1034 _dbus_assert (sep >= 0);
1035
1036 if (sep == 0)
1037 return _dbus_string_append (dirname, "/");
1038
1039 /* Now find the previous separator */
1040 _dbus_string_find_byte_backward (filename, sep, '/', &sep);
1041 if (sep < 0)
1042 return _dbus_string_append (dirname, ".");
1043
1044 /* skip multiple separators */
1045 while (sep > 0 && _dbus_string_get_byte (filename, sep - 1) == '/')
1046 --sep;
1047
1048 _dbus_assert (sep >= 0);
1049
1050 if (sep == 0 &&
1051 _dbus_string_get_byte (filename, 0) == '/')
1052 return _dbus_string_append (dirname, "/");
1053 else
1054 return _dbus_string_copy_len (filename, 0, sep - 0,
1055 dirname, _dbus_string_get_length (dirname));
1056} /* DBusString stuff */
1058
1059static void
1060string_squash_nonprintable (DBusString *str)
1061{
1062 unsigned char *buf;
1063 int i, len;
1064
1065 buf = _dbus_string_get_udata (str);
1066 len = _dbus_string_get_length (str);
1067
1068 /* /proc/$pid/cmdline is a sequence of \0-terminated words, but we
1069 * want a sequence of space-separated words, with no extra trailing
1070 * space:
1071 * "/bin/sleep" "\0" "60" "\0"
1072 * -> "/bin/sleep" "\0" "60"
1073 * -> "/bin/sleep" " " "60"
1074 *
1075 * so chop off the trailing NUL before cleaning up unprintable
1076 * characters. */
1077 if (len > 0 && buf[len - 1] == '\0')
1078 {
1079 _dbus_string_shorten (str, 1);
1080 len--;
1081 }
1082
1083 for (i = 0; i < len; i++)
1084 {
1085 unsigned char c = (unsigned char) buf[i];
1086 if (c == '\0')
1087 buf[i] = ' ';
1088 else if (c < 0x20 || c > 127)
1089 buf[i] = '?';
1090 }
1091}
1092
1108_dbus_command_for_pid (unsigned long pid,
1109 DBusString *str,
1110 int max_len,
1111 DBusError *error)
1112{
1113 /* This is all Linux-specific for now */
1114 DBusString path;
1115 DBusString cmdline;
1116 int fd;
1117
1118 if (!_dbus_string_init (&path))
1119 {
1120 _DBUS_SET_OOM (error);
1121 return FALSE;
1122 }
1123
1124 if (!_dbus_string_init (&cmdline))
1125 {
1126 _DBUS_SET_OOM (error);
1127 _dbus_string_free (&path);
1128 return FALSE;
1129 }
1130
1131 if (!_dbus_string_append_printf (&path, "/proc/%ld/cmdline", pid))
1132 goto oom;
1133
1134 fd = open (_dbus_string_get_const_data (&path), O_RDONLY);
1135 if (fd < 0)
1136 {
1137 dbus_set_error (error,
1138 _dbus_error_from_errno (errno),
1139 "Failed to open \"%s\": %s",
1141 _dbus_strerror (errno));
1142 goto fail;
1143 }
1144
1145 if (!_dbus_read (fd, &cmdline, max_len))
1146 {
1147 dbus_set_error (error,
1148 _dbus_error_from_errno (errno),
1149 "Failed to read from \"%s\": %s",
1151 _dbus_strerror (errno));
1152 _dbus_close (fd, NULL);
1153 goto fail;
1154 }
1155
1156 if (!_dbus_close (fd, error))
1157 goto fail;
1158
1159 string_squash_nonprintable (&cmdline);
1160
1161 if (!_dbus_string_copy (&cmdline, 0, str, _dbus_string_get_length (str)))
1162 goto oom;
1163
1164 _dbus_string_free (&cmdline);
1165 _dbus_string_free (&path);
1166 return TRUE;
1167oom:
1168 _DBUS_SET_OOM (error);
1169fail:
1170 _dbus_string_free (&cmdline);
1171 _dbus_string_free (&path);
1172 return FALSE;
1173}
1174
1185{
1186 return TRUE;
1187}
1188
1189static dbus_bool_t
1190ensure_owned_directory (const char *label,
1191 const DBusString *string,
1192 dbus_bool_t create,
1193 DBusError *error)
1194{
1195 const char *dir = _dbus_string_get_const_data (string);
1196 struct stat buf;
1197
1198 if (create && !_dbus_ensure_directory (string, error))
1199 return FALSE;
1200
1201 /*
1202 * The stat()-based checks in this function are to protect against
1203 * mistakes, not malice. We are working in a directory that is meant
1204 * to be trusted; but if a user has used `su` or similar to escalate
1205 * their privileges without correctly clearing the environment, the
1206 * XDG_RUNTIME_DIR in the environment might still be the user's
1207 * and not root's. We don't want to write root-owned files into that
1208 * directory, so just warn and don't provide support for transient
1209 * services in that case.
1210 *
1211 * In particular, we use stat() and not lstat() so that if we later
1212 * decide to use a different directory name for transient services,
1213 * we can drop in a compatibility symlink without breaking older
1214 * libdbus.
1215 */
1216
1217 if (stat (dir, &buf) != 0)
1218 {
1219 int saved_errno = errno;
1220
1221 dbus_set_error (error, _dbus_error_from_errno (saved_errno),
1222 "%s \"%s\" not available: %s", label, dir,
1223 _dbus_strerror (saved_errno));
1224 return FALSE;
1225 }
1226
1227 if (!S_ISDIR (buf.st_mode))
1228 {
1229 dbus_set_error (error, DBUS_ERROR_FAILED, "%s \"%s\" is not a directory",
1230 label, dir);
1231 return FALSE;
1232 }
1233
1234 if (buf.st_uid != geteuid ())
1235 {
1237 "%s \"%s\" is owned by uid %ld, not our uid %ld",
1238 label, dir, (long) buf.st_uid, (long) geteuid ());
1239 return FALSE;
1240 }
1241
1242 /* This is just because we have the stat() results already, so we might
1243 * as well check opportunistically. */
1244 if ((S_IWOTH | S_IWGRP) & buf.st_mode)
1245 {
1247 "%s \"%s\" can be written by others (mode 0%o)",
1248 label, dir, buf.st_mode);
1249 return FALSE;
1250 }
1251
1252 return TRUE;
1253}
1254
1255#define DBUS_UNIX_STANDARD_SESSION_SERVICEDIR "/dbus-1/services"
1256#define DBUS_UNIX_STANDARD_SYSTEM_SERVICEDIR "/dbus-1/system-services"
1257
1267 DBusError *error)
1268{
1269 const char *xdg_runtime_dir;
1270 DBusString services;
1271 DBusString dbus1;
1272 DBusString xrd;
1273 dbus_bool_t ret = FALSE;
1274 char *data = NULL;
1275
1276 if (!_dbus_string_init (&dbus1))
1277 {
1278 _DBUS_SET_OOM (error);
1279 return FALSE;
1280 }
1281
1282 if (!_dbus_string_init (&services))
1283 {
1284 _dbus_string_free (&dbus1);
1285 _DBUS_SET_OOM (error);
1286 return FALSE;
1287 }
1288
1289 if (!_dbus_string_init (&xrd))
1290 {
1291 _dbus_string_free (&dbus1);
1292 _dbus_string_free (&services);
1293 _DBUS_SET_OOM (error);
1294 return FALSE;
1295 }
1296
1297 xdg_runtime_dir = _dbus_getenv ("XDG_RUNTIME_DIR");
1298
1299 /* Not an error, we just can't have transient session services */
1300 if (xdg_runtime_dir == NULL)
1301 {
1302 _dbus_verbose ("XDG_RUNTIME_DIR is unset: transient session services "
1303 "not available here\n");
1304 ret = TRUE;
1305 goto out;
1306 }
1307
1308 if (!_dbus_string_append (&xrd, xdg_runtime_dir) ||
1309 !_dbus_string_append_printf (&dbus1, "%s/dbus-1",
1310 xdg_runtime_dir) ||
1311 !_dbus_string_append_printf (&services, "%s/dbus-1/services",
1312 xdg_runtime_dir))
1313 {
1314 _DBUS_SET_OOM (error);
1315 goto out;
1316 }
1317
1318 if (!ensure_owned_directory ("XDG_RUNTIME_DIR", &xrd, FALSE, error) ||
1319 !ensure_owned_directory ("XDG_RUNTIME_DIR subdirectory", &dbus1, TRUE,
1320 error) ||
1321 !ensure_owned_directory ("XDG_RUNTIME_DIR subdirectory", &services,
1322 TRUE, error))
1323 goto out;
1324
1325 if (!_dbus_string_steal_data (&services, &data) ||
1326 !_dbus_list_append (dirs, data))
1327 {
1328 _DBUS_SET_OOM (error);
1329 goto out;
1330 }
1331
1332 _dbus_verbose ("Transient service directory is %s\n", data);
1333 /* Ownership was transferred to @dirs */
1334 data = NULL;
1335 ret = TRUE;
1336
1337out:
1338 _dbus_string_free (&dbus1);
1339 _dbus_string_free (&services);
1340 _dbus_string_free (&xrd);
1341 dbus_free (data);
1342 return ret;
1343}
1344
1364{
1365 const char *xdg_data_home;
1366 const char *xdg_data_dirs;
1367 DBusString servicedir_path;
1368
1369 if (!_dbus_string_init (&servicedir_path))
1370 return FALSE;
1371
1372 xdg_data_home = _dbus_getenv ("XDG_DATA_HOME");
1373 xdg_data_dirs = _dbus_getenv ("XDG_DATA_DIRS");
1374
1375 if (xdg_data_home != NULL)
1376 {
1377 if (!_dbus_string_append (&servicedir_path, xdg_data_home))
1378 goto oom;
1379 }
1380 else
1381 {
1382 const DBusString *homedir;
1383 DBusString local_share;
1384
1385 if (!_dbus_homedir_from_current_process (&homedir))
1386 goto oom;
1387
1388 if (!_dbus_string_append (&servicedir_path, _dbus_string_get_const_data (homedir)))
1389 goto oom;
1390
1391 _dbus_string_init_const (&local_share, "/.local/share");
1392 if (!_dbus_concat_dir_and_file (&servicedir_path, &local_share))
1393 goto oom;
1394 }
1395
1396 if (!_dbus_string_append (&servicedir_path, ":"))
1397 goto oom;
1398
1399 if (xdg_data_dirs != NULL)
1400 {
1401 if (!_dbus_string_append (&servicedir_path, xdg_data_dirs))
1402 goto oom;
1403
1404 if (!_dbus_string_append (&servicedir_path, ":"))
1405 goto oom;
1406 }
1407 else
1408 {
1409 if (!_dbus_string_append (&servicedir_path, "/usr/local/share:/usr/share:"))
1410 goto oom;
1411 }
1412
1413 /*
1414 * add configured datadir to defaults
1415 * this may be the same as an xdg dir
1416 * however the config parser should take
1417 * care of duplicates
1418 */
1419 if (!_dbus_string_append (&servicedir_path, DBUS_DATADIR))
1420 goto oom;
1421
1422 if (!_dbus_split_paths_and_append (&servicedir_path,
1423 DBUS_UNIX_STANDARD_SESSION_SERVICEDIR,
1424 dirs))
1425 goto oom;
1426
1427 _dbus_string_free (&servicedir_path);
1428 return TRUE;
1429
1430 oom:
1431 _dbus_string_free (&servicedir_path);
1432 return FALSE;
1433}
1434
1435
1456{
1457 /*
1458 * DBUS_DATADIR may be the same as one of the standard directories. However,
1459 * the config parser should take care of the duplicates.
1460 *
1461 * Also, append /lib as counterpart of /usr/share on the root
1462 * directory (the root directory does not know /share), in order to
1463 * facilitate early boot system bus activation where /usr might not
1464 * be available.
1465 */
1466 static const char standard_search_path[] =
1467 "/usr/local/share:"
1468 "/usr/share:"
1469 DBUS_DATADIR ":"
1470 "/lib";
1471 DBusString servicedir_path;
1472
1473 _dbus_string_init_const (&servicedir_path, standard_search_path);
1474
1475 return _dbus_split_paths_and_append (&servicedir_path,
1476 DBUS_UNIX_STANDARD_SYSTEM_SERVICEDIR,
1477 dirs);
1478}
1479
1490{
1492
1493 return _dbus_string_append (str, DBUS_SYSTEM_CONFIG_FILE);
1494}
1495
1504{
1506
1507 return _dbus_string_append (str, DBUS_SESSION_CONFIG_FILE);
1508}
1509
1514void
1516{
1517#ifdef HAVE_SYSTEMD
1518 sd_notify (0, "READY=1");
1519#endif
1520}
1521
1526void
1528{
1529#ifdef HAVE_SYSTEMD
1530 sd_notify (0, "RELOADING=1");
1531#endif
1532}
1533
1538void
1540{
1541#ifdef HAVE_SYSTEMD
1542 /* For systemd, this is the same code */
1544#endif
1545}
1546
1551void
1553{
1554#ifdef HAVE_SYSTEMD
1555 sd_notify (0, "STOPPING=1");
1556#endif
1557}
1558
1573_dbus_reset_oom_score_adj (const char **error_str_p)
1574{
1575#ifdef __linux__
1576 int fd = -1;
1577 dbus_bool_t ret = FALSE;
1578 int saved_errno = 0;
1579 const char *error_str = NULL;
1580
1581#ifdef O_CLOEXEC
1582 fd = open ("/proc/self/oom_score_adj", O_RDONLY | O_CLOEXEC);
1583#endif
1584
1585 if (fd < 0)
1586 {
1587 fd = open ("/proc/self/oom_score_adj", O_RDONLY);
1588 if (fd >= 0)
1590 }
1591
1592 if (fd >= 0)
1593 {
1594 ssize_t read_result = -1;
1595 /* It doesn't actually matter whether we read the whole file,
1596 * as long as we get the presence or absence of the minus sign */
1597 char first_char = '\0';
1598
1599 read_result = read (fd, &first_char, 1);
1600
1601 if (read_result < 0)
1602 {
1603 /* This probably can't actually happen in practice: if we can
1604 * open it, then we can hopefully read from it */
1605 ret = FALSE;
1606 error_str = "failed to read from /proc/self/oom_score_adj";
1607 saved_errno = errno;
1608 goto out;
1609 }
1610
1611 /* If we are running with protection from the OOM killer
1612 * (typical for the system dbus-daemon under systemd), then
1613 * oom_score_adj will be negative. Drop that protection,
1614 * returning to oom_score_adj = 0.
1615 *
1616 * Conversely, if we are running with increased susceptibility
1617 * to the OOM killer (as user sessions typically do in
1618 * systemd >= 250), oom_score_adj will be strictly positive,
1619 * and we are not allowed to decrease it to 0 without privileges.
1620 *
1621 * If it's exactly 0 (typical for non-systemd systems, and
1622 * user processes on older systemd) then there's no need to
1623 * alter it.
1624 *
1625 * We shouldn't get an empty result, but if we do, assume it
1626 * means zero and don't try to change it. */
1627 if (read_result == 0 || first_char != '-')
1628 {
1629 /* Nothing needs to be done: the OOM score adjustment is
1630 * non-negative */
1631 ret = TRUE;
1632 goto out;
1633 }
1634
1635 close (fd);
1636#ifdef O_CLOEXEC
1637 fd = open ("/proc/self/oom_score_adj", O_WRONLY | O_CLOEXEC);
1638
1639 if (fd < 0)
1640#endif
1641 {
1642 fd = open ("/proc/self/oom_score_adj", O_WRONLY);
1643 if (fd >= 0)
1645 }
1646
1647 if (fd < 0)
1648 {
1649 ret = FALSE;
1650 error_str = "open(/proc/self/oom_score_adj) for writing";
1651 saved_errno = errno;
1652 goto out;
1653 }
1654
1655 if (pwrite (fd, "0", sizeof (char), 0) < 0)
1656 {
1657 ret = FALSE;
1658 error_str = "writing oom_score_adj error";
1659 saved_errno = errno;
1660 goto out;
1661 }
1662
1663 /* Success */
1664 ret = TRUE;
1665 }
1666 else if (errno == ENOENT)
1667 {
1668 /* If /proc/self/oom_score_adj doesn't exist, assume the kernel
1669 * doesn't support this feature and ignore it. */
1670 ret = TRUE;
1671 }
1672 else
1673 {
1674 ret = FALSE;
1675 error_str = "open(/proc/self/oom_score_adj) for reading";
1676 saved_errno = errno;
1677 goto out;
1678 }
1679
1680out:
1681 if (fd >= 0)
1682 _dbus_close (fd, NULL);
1683
1684 if (error_str_p != NULL)
1685 *error_str_p = error_str;
1686
1687 errno = saved_errno;
1688 return ret;
1689#else
1690 /* nothing to do on this platform */
1691 return TRUE;
1692#endif
1693}
void dbus_set_error(DBusError *error, const char *name, const char *format,...)
Assigns an error name and message to a DBusError.
Definition: dbus-errors.c:356
dbus_bool_t dbus_error_is_set(const DBusError *error)
Checks whether an error occurred (the error is set).
Definition: dbus-errors.c:331
dbus_bool_t _dbus_stat(const DBusString *filename, DBusStat *statbuf, DBusError *error)
stat() wrapper.
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called.
dbus_bool_t _dbus_write_pid_to_file_and_pipe(const DBusString *pidfile, DBusPipe *print_pid_pipe, dbus_pid_t pid_to_write, DBusError *error)
Writes the given pid_to_write to a pidfile (if non-NULL) and/or to a pipe (if non-NULL).
#define _dbus_assert(condition)
Aborts with an error message if the condition is false.
dbus_bool_t _dbus_file_exists(const char *file)
Checks if a file exists.
dbus_bool_t _dbus_homedir_from_current_process(const DBusString **homedir)
Gets homedir of user owning current process.
Definition: dbus-userdb.c:442
void _dbus_directory_close(DBusDirIter *iter)
Closes a directory iteration.
dbus_bool_t _dbus_group_info_fill(DBusGroupInfo *info, const DBusString *groupname, DBusError *error)
Initializes the given DBusGroupInfo struct with information about the given group name.
DBusDirIter * _dbus_directory_open(const DBusString *filename, DBusError *error)
Open a directory to iterate over.
dbus_bool_t _dbus_parse_unix_user_from_config(const DBusString *username, dbus_uid_t *uid_p)
Parse a UNIX user from the bus config file.
dbus_bool_t _dbus_verify_daemon_user(const char *user)
Verify that after the fork we can successfully change to this user.
const char * _dbus_error_from_errno(int error_number)
Converts a UNIX errno, or Windows errno or WinSock error value into a DBusError name.
Definition: dbus-sysdeps.c:601
void _dbus_set_signal_handler(int sig, DBusSignalHandler handler)
Installs a UNIX signal handler.
dbus_bool_t _dbus_path_is_absolute(const DBusString *filename)
Checks whether the filename is an absolute path.
char * _dbus_strdup(const char *str)
Duplicates a string.
dbus_bool_t _dbus_unix_groups_from_uid(dbus_uid_t uid, dbus_gid_t **group_ids, int *n_group_ids)
Gets all groups corresponding to the given UNIX user ID.
dbus_bool_t _dbus_change_to_daemon_user(const char *user, DBusError *error)
Changes the user and group the bus is running as.
dbus_bool_t _dbus_unix_user_is_process_owner(dbus_uid_t uid)
Checks to see if the UNIX user ID matches the UID of the process.
dbus_bool_t _dbus_get_group_id(const DBusString *groupname, dbus_gid_t *gid)
Gets group ID given groupname.
dbus_bool_t _dbus_windows_user_is_process_owner(const char *windows_sid)
Checks to see if the Windows user SID matches the owner of the process.
dbus_bool_t _dbus_parse_unix_group_from_config(const DBusString *groupname, dbus_gid_t *gid_p)
Parse a UNIX group from the bus config file.
dbus_bool_t _dbus_is_console_user(dbus_uid_t uid, DBusError *error)
Checks to see if the UID sent in is the console user.
dbus_bool_t _dbus_directory_get_next_file(DBusDirIter *iter, DBusString *filename, DBusError *error)
Get next file in the directory.
void _dbus_warn(const char *format,...)
Prints a warning message to stderr.
dbus_bool_t _dbus_get_user_id_and_primary_group(const DBusString *username, dbus_uid_t *uid_p, dbus_gid_t *gid_p)
Gets user ID and primary group given username.
dbus_bool_t _dbus_become_daemon(const DBusString *pidfile, DBusPipe *print_pid_pipe, DBusError *error, dbus_bool_t keep_umask)
Does the chdir, fork, setsid, etc.
dbus_bool_t _dbus_group_info_fill_gid(DBusGroupInfo *info, dbus_gid_t gid, DBusError *error)
Initializes the given DBusGroupInfo struct with information about the given group ID.
dbus_bool_t _dbus_groups_from_uid(dbus_uid_t uid, dbus_gid_t **group_ids, int *n_group_ids)
Gets all groups corresponding to the given UID.
dbus_bool_t _dbus_unix_user_is_at_console(dbus_uid_t uid, DBusError *error)
Checks to see if the UNIX user ID is at the console.
dbus_bool_t _dbus_get_user_id(const DBusString *username, dbus_uid_t *uid)
Gets user ID given username.
dbus_bool_t _dbus_list_append(DBusList **list, void *data)
Appends a value to the list.
Definition: dbus-list.c:273
#define NULL
A null pointer, defined appropriately for C or C++.
#define TRUE
Expands to "1".
#define FALSE
Expands to "0".
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
Definition: dbus-memory.c:694
#define dbus_new0(type, count)
Safe macro for using dbus_malloc0().
Definition: dbus-memory.h:60
void * dbus_malloc(size_t bytes)
Allocates the given number of bytes, as with standard malloc().
Definition: dbus-memory.c:454
#define DBUS_ERROR_NOT_SUPPORTED
Requested operation isn't supported (like ENOSYS on UNIX).
#define DBUS_ERROR_FAILED
A generic error; "something went wrong" - see the error message for more.
#define DBUS_ERROR_NO_MEMORY
There was not enough memory to complete an operation.
dbus_bool_t _dbus_string_set_length(DBusString *str, int length)
Sets the length of a string.
Definition: dbus-string.c:847
dbus_bool_t _dbus_string_append(DBusString *str, const char *buffer)
Appends a nul-terminated C-style string to a DBusString.
Definition: dbus-string.c:980
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition: dbus-string.c:182
void _dbus_string_init_const(DBusString *str, const char *value)
Initializes a constant string.
Definition: dbus-string.c:197
dbus_bool_t _dbus_string_copy(const DBusString *source, int start, DBusString *dest, int insert_at)
Like _dbus_string_move(), but does not delete the section of the source string that's copied to the d...
Definition: dbus-string.c:1345
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_string_append_int(DBusString *str, long value)
Appends an integer to a DBusString.
Definition: dbus-sysdeps.c:365
dbus_bool_t _dbus_string_steal_data(DBusString *str, char **data_return)
Like _dbus_string_get_data(), but removes the gotten data from the original string.
Definition: dbus-string.c:686
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init(), and fills it with the same contents as #_DBUS_STRING_I...
Definition: dbus-string.c:278
void _dbus_string_shorten(DBusString *str, int length_to_remove)
Makes a string shorter by the given number of bytes.
Definition: dbus-string.c:825
dbus_bool_t _dbus_string_find_byte_backward(const DBusString *str, int start, unsigned char byte, int *found)
Find the given byte scanning backward from the given start.
int _dbus_string_get_length(const DBusString *str)
Gets the length of a string (not including nul termination).
Definition: dbus-string.c:784
dbus_bool_t _dbus_string_append_printf(DBusString *str, const char *format,...)
Appends a printf-style formatted string to the DBusString.
Definition: dbus-string.c:1147
const char * _dbus_string_get_const_data(const DBusString *str)
Gets the raw character buffer from a const string.
Definition: dbus-string.c:513
unsigned char _dbus_string_get_byte(const DBusString *str, int start)
Gets the byte at the given position.
Definition: dbus-string.c:607
dbus_bool_t _dbus_string_copy_len(const DBusString *source, int start, int len, DBusString *dest, int insert_at)
Like _dbus_string_copy(), but can copy a segment from the middle of the source string.
Definition: dbus-string.c:1437
dbus_bool_t _dbus_string_get_dirname(const DBusString *filename, DBusString *dirname)
Get the directory name from a complete filename.
dbus_bool_t _dbus_reset_oom_score_adj(const char **error_str_p)
If the current process has been protected from the Linux OOM killer (the oom_score_adj process parame...
dbus_bool_t _dbus_close(int fd, DBusError *error)
Closes a file descriptor.
void(* DBusSignalHandler)(int sig)
A UNIX signal handler.
void _dbus_fd_set_close_on_exec(int fd)
Sets the file descriptor to be close on exec.
int _dbus_read(int fd, DBusString *buffer, int count)
Thin wrapper around the read() system call that appends the data it reads to the DBusString buffer.
dbus_bool_t _dbus_ensure_standard_fds(DBusEnsureStandardFdsFlags flags, const char **error_str_p)
Ensure that the standard file descriptors stdin, stdout and stderr are open, by opening /dev/null if ...
dbus_uid_t _dbus_geteuid(void)
Gets our effective UID.
dbus_bool_t _dbus_get_standard_session_servicedirs(DBusList **dirs)
Returns the standard directories for a session bus to look for service activation files.
void _dbus_daemon_report_ready(void)
Report to a service manager that the daemon calling this function is ready for use.
unsigned long dbus_uid_t
A user ID.
Definition: dbus-sysdeps.h:137
dbus_bool_t _dbus_get_session_config_file(DBusString *str)
Get the absolute path of the session.conf file.
unsigned long dbus_pid_t
A process ID.
Definition: dbus-sysdeps.h:135
void _dbus_daemon_report_reloading(void)
Report to a service manager that the daemon calling this function is reloading configuration.
unsigned long dbus_gid_t
A group ID.
Definition: dbus-sysdeps.h:139
dbus_bool_t _dbus_command_for_pid(unsigned long pid, DBusString *str, int max_len, DBusError *error)
Get a printable string describing the command used to execute the process with pid.
dbus_bool_t _dbus_get_system_config_file(DBusString *str)
Get the absolute path of the system.conf file (there is no system bus on Windows so this can just ret...
dbus_bool_t _dbus_set_up_transient_session_servicedirs(DBusList **dirs, DBusError *error)
Returns the standard directories for a session bus to look for transient service activation files.
const char * _dbus_getenv(const char *varname)
Wrapper for getenv().
Definition: dbus-sysdeps.c:197
dbus_bool_t _dbus_get_standard_system_servicedirs(DBusList **dirs)
Returns the standard directories for a system bus to look for service activation files.
void _dbus_daemon_report_reloaded(void)
Report to a service manager that the daemon calling this function is reloading configuration.
#define DBUS_GID_UNSET
an invalid GID used to represent an uninitialized dbus_gid_t field
Definition: dbus-sysdeps.h:146
void _dbus_daemon_report_stopping(void)
Report to a service manager that the daemon calling this function is shutting down.
dbus_bool_t _dbus_concat_dir_and_file(DBusString *dir, const DBusString *next_component)
Appends the given filename to the given directory.
dbus_bool_t _dbus_split_paths_and_append(DBusString *dirs, const char *suffix, DBusList **dir_list)
Split paths into a list of char strings.
Definition: dbus-sysdeps.c:238
dbus_bool_t _dbus_replace_install_prefix(DBusString *path)
Replace the DBUS_PREFIX in the given path, in-place, by the current D-Bus installation directory.
dbus_bool_t _dbus_ensure_directory(const DBusString *filename, DBusError *error)
Creates a directory; succeeds if the directory is created or already existed.
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition: dbus-types.h:37
Internals of directory iterator.
DIR * d
The DIR* from opendir()
Object representing an exception.
Definition: dbus-errors.h:51
const char * message
public error message field
Definition: dbus-errors.h:53
Information about a UNIX group.
dbus_gid_t gid
GID.
char * groupname
Group name.
A node in a linked list.
Definition: dbus-list.h:37
Portable struct with stat() results.
Definition: dbus-sysdeps.h:550
unsigned long nlink
Number of hard links.
Definition: dbus-sysdeps.h:552
unsigned long size
Size of file.
Definition: dbus-sysdeps.h:555
dbus_uid_t uid
User owning file.
Definition: dbus-sysdeps.h:553
unsigned long mode
File mode.
Definition: dbus-sysdeps.h:551
dbus_gid_t gid
Group owning file.
Definition: dbus-sysdeps.h:554
unsigned long atime
Access time.
Definition: dbus-sysdeps.h:556
unsigned long ctime
Creation time.
Definition: dbus-sysdeps.h:558
unsigned long mtime
Modify time.
Definition: dbus-sysdeps.h:557