D-Bus: dbus-sysdeps-util-unix.c Source File

D-Bus 1.12.6

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 * Licensed under the Academic Free License version 2.1
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 *
23 */
24
25 #include <config.h>
26 #include "dbus-sysdeps.h"
27 #include "dbus-sysdeps-unix.h"
28 #include "dbus-internals.h"
29 #include "dbus-list.h"
30 #include "dbus-pipe.h"
31 #include "dbus-protocol.h"
32 #include "dbus-string.h"
33 #define DBUS_USERDB_INCLUDES_PRIVATE 1
34 #include "dbus-userdb.h"
35 #include "dbus-test.h"
36
37 #include <sys/types.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <signal.h>
41 #include <unistd.h>
42 #include <stdio.h>
43 #include <errno.h>
44 #include <fcntl.h>
45 #include <sys/stat.h>
46 #ifdef HAVE_SYS_RESOURCE_H
47 #include <sys/resource.h>
48 #endif
49 #include <grp.h>
50 #include <sys/socket.h>
51 #include <dirent.h>
52 #include <sys/un.h>
53
54 #ifdef HAVE_SYS_SYSLIMITS_H
55 #include <sys/syslimits.h>
56 #endif
57
58 #ifdef HAVE_SYSTEMD
59 #include <systemd/sd-daemon.h>
60 #endif
61
62 #ifndef O_BINARY
63 #define O_BINARY 0
64 #endif
65
81 dbus_bool_t
82 _dbus_become_daemon (const DBusString *pidfile,
83 DBusPipe *print_pid_pipe,
84 DBusError *error,
85 dbus_bool_t keep_umask)
86 {
87 const char *s;
88 pid_t child_pid;
89 DBusEnsureStandardFdsFlags flags;
90
91 _dbus_verbose ("Becoming a daemon...\n");
92
93 _dbus_verbose ("chdir to /\n");
94 if (chdir ("/") < 0)
95 {
96 dbus_set_error (error, DBUS_ERROR_FAILED,
97 "Could not chdir() to root directory");
98 return FALSE;
99 }
100
101 _dbus_verbose ("forking...\n");
102 switch ((child_pid = fork ()))
103 {
104 case -1:
105 _dbus_verbose ("fork failed\n");
106 dbus_set_error (error, _dbus_error_from_errno (errno),
107 "Failed to fork daemon: %s", _dbus_strerror (errno));
108 return FALSE;
109 break;
110
111 case 0:
112 _dbus_verbose ("in child, closing std file descriptors\n");
113
114 flags = DBUS_FORCE_STDIN_NULL | DBUS_FORCE_STDOUT_NULL;
115 s = _dbus_getenv ("DBUS_DEBUG_OUTPUT");
116
117 if (s == NULL || *s == '\0')
118 flags |= DBUS_FORCE_STDERR_NULL;
119 else
120 _dbus_verbose ("keeping stderr open due to DBUS_DEBUG_OUTPUT\n");
121
122 if (!_dbus_ensure_standard_fds (flags, &s))
123 {
124 _dbus_warn ("%s: %s", s, _dbus_strerror (errno));
125 _exit (1);
126 }
127
128 if (!keep_umask)
129 {
130 /* Get a predictable umask */
131 _dbus_verbose ("setting umask\n");
132 umask (022);
133 }
134
135 _dbus_verbose ("calling setsid()\n");
136 if (setsid () == -1)
137 _dbus_assert_not_reached ("setsid() failed");
138
139 break;
140
141 default:
142 if (!_dbus_write_pid_to_file_and_pipe (pidfile, print_pid_pipe,
143 child_pid, error))
144 {
145 _dbus_verbose ("pid file or pipe write failed: %s\n",
146 error->message);
147 kill (child_pid, SIGTERM);
148 return FALSE;
149 }
150
151 _dbus_verbose ("parent exiting\n");
152 _exit (0);
153 break;
154 }
155
156 return TRUE;
157 }
158
159
168 static dbus_bool_t
169 _dbus_write_pid_file (const DBusString *filename,
170 unsigned long pid,
171 DBusError *error)
172 {
173 const char *cfilename;
174 int fd;
175 FILE *f;
176
177 cfilename = _dbus_string_get_const_data (filename);
178
179 fd = open (cfilename, O_WRONLY|O_CREAT|O_EXCL|O_BINARY, 0644);
180
181 if (fd < 0)
182 {
183 dbus_set_error (error, _dbus_error_from_errno (errno),
184 "Failed to open \"%s\": %s", cfilename,
185 _dbus_strerror (errno));
186 return FALSE;
187 }
188
189 if ((f = fdopen (fd, "w")) == NULL)
190 {
191 dbus_set_error (error, _dbus_error_from_errno (errno),
192 "Failed to fdopen fd %d: %s", fd, _dbus_strerror (errno));
193 _dbus_close (fd, NULL);
194 return FALSE;
195 }
196
197 if (fprintf (f, "%lu\n", pid) < 0)
198 {
199 dbus_set_error (error, _dbus_error_from_errno (errno),
200 "Failed to write to \"%s\": %s", cfilename,
201 _dbus_strerror (errno));
202
203 fclose (f);
204 return FALSE;
205 }
206
207 if (fclose (f) == EOF)
208 {
209 dbus_set_error (error, _dbus_error_from_errno (errno),
210 "Failed to close \"%s\": %s", cfilename,
211 _dbus_strerror (errno));
212 return FALSE;
213 }
214
215 return TRUE;
216 }
217
229 dbus_bool_t
230 _dbus_write_pid_to_file_and_pipe (const DBusString *pidfile,
231 DBusPipe *print_pid_pipe,
232 dbus_pid_t pid_to_write,
233 DBusError *error)
234 {
235 if (pidfile)
236 {
237 _dbus_verbose ("writing pid file %s\n", _dbus_string_get_const_data (pidfile));
238 if (!_dbus_write_pid_file (pidfile,
239 pid_to_write,
240 error))
241 {
242 _dbus_verbose ("pid file write failed\n");
243 _DBUS_ASSERT_ERROR_IS_SET(error);
244 return FALSE;
245 }
246 }
247 else
248 {
249 _dbus_verbose ("No pid file requested\n");
250 }
251
252 if (print_pid_pipe != NULL && _dbus_pipe_is_valid (print_pid_pipe))
253 {
254 DBusString pid;
255 int bytes;
256
257 _dbus_verbose ("writing our pid to pipe %d\n",
258 print_pid_pipe->fd);
259
260 if (!_dbus_string_init (&pid))
261 {
262 _DBUS_SET_OOM (error);
263 return FALSE;
264 }
265
266 if (!_dbus_string_append_int (&pid, pid_to_write) ||
267 !_dbus_string_append (&pid, "\n"))
268 {
269 _dbus_string_free (&pid);
270 _DBUS_SET_OOM (error);
271 return FALSE;
272 }
273
274 bytes = _dbus_string_get_length (&pid);
275 if (_dbus_pipe_write (print_pid_pipe, &pid, 0, bytes, error) != bytes)
276 {
277 /* _dbus_pipe_write sets error only on failure, not short write */
278 if (error != NULL && !dbus_error_is_set(error))
279 {
280 dbus_set_error (error, DBUS_ERROR_FAILED,
281 "Printing message bus PID: did not write enough bytes\n");
282 }
283 _dbus_string_free (&pid);
284 return FALSE;
285 }
286
287 _dbus_string_free (&pid);
288 }
289 else
290 {
291 _dbus_verbose ("No pid pipe to write to\n");
292 }
293
294 return TRUE;
295 }
296
303 dbus_bool_t
304 _dbus_verify_daemon_user (const char *user)
305 {
306 DBusString u;
307
308 _dbus_string_init_const (&u, user);
309
310 return _dbus_get_user_id_and_primary_group (&u, NULL, NULL);
311 }
312
313
314 /* The HAVE_LIBAUDIT case lives in selinux.c */
315 #ifndef HAVE_LIBAUDIT
316
323 dbus_bool_t
324 _dbus_change_to_daemon_user (const char *user,
325 DBusError *error)
326 {
327 dbus_uid_t uid;
328 dbus_gid_t gid;
329 DBusString u;
330
331 _dbus_string_init_const (&u, user);
332
333 if (!_dbus_get_user_id_and_primary_group (&u, &uid, &gid))
334 {
335 dbus_set_error (error, DBUS_ERROR_FAILED,
336 "User '%s' does not appear to exist?",
337 user);
338 return FALSE;
339 }
340
341 /* setgroups() only works if we are a privileged process,
342 * so we don't return error on failure; the only possible
343 * failure is that we don't have perms to do it.
344 *
345 * not sure this is right, maybe if setuid()
346 * is going to work then setgroups() should also work.
347 */
348 if (setgroups (0, NULL) < 0)
349 _dbus_warn ("Failed to drop supplementary groups: %s",
350 _dbus_strerror (errno));
351
352 /* Set GID first, or the setuid may remove our permission
353 * to change the GID
354 */
355 if (setgid (gid) < 0)
356 {
357 dbus_set_error (error, _dbus_error_from_errno (errno),
358 "Failed to set GID to %lu: %s", gid,
359 _dbus_strerror (errno));
360 return FALSE;
361 }
362
363 if (setuid (uid) < 0)
364 {
365 dbus_set_error (error, _dbus_error_from_errno (errno),
366 "Failed to set UID to %lu: %s", uid,
367 _dbus_strerror (errno));
368 return FALSE;
369 }
370
371 return TRUE;
372 }
373 #endif /* !HAVE_LIBAUDIT */
374
375 #ifdef HAVE_SETRLIMIT
376
377 /* We assume that if we have setrlimit, we also have getrlimit and
378 * struct rlimit.
379 */
380
381 struct DBusRLimit {
382 struct rlimit lim;
383 };
384
385 DBusRLimit *
386 _dbus_rlimit_save_fd_limit (DBusError *error)
387 {
388 DBusRLimit *self;
389
390 self = dbus_new0 (DBusRLimit, 1);
391
392 if (self == NULL)
393 {
394 _DBUS_SET_OOM (error);
395 return NULL;
396 }
397
398 if (getrlimit (RLIMIT_NOFILE, &self->lim) < 0)
399 {
400 dbus_set_error (error, _dbus_error_from_errno (errno),
401 "Failed to get fd limit: %s", _dbus_strerror (errno));
402 dbus_free (self);
403 return NULL;
404 }
405
406 return self;
407 }
408
409 dbus_bool_t
410 _dbus_rlimit_raise_fd_limit_if_privileged (unsigned int desired,
411 DBusError *error)
412 {
413 struct rlimit lim;
414
415 /* No point to doing this practically speaking
416 * if we're not uid 0. We expect the system
417 * bus to use this before we change UID, and
418 * the session bus takes the Linux default,
419 * currently 1024 for cur and 4096 for max.
420 */
421 if (getuid () != 0)
422 {
423 /* not an error, we're probably the session bus */
424 return TRUE;
425 }
426
427 if (getrlimit (RLIMIT_NOFILE, &lim) < 0)
428 {
429 dbus_set_error (error, _dbus_error_from_errno (errno),
430 "Failed to get fd limit: %s", _dbus_strerror (errno));
431 return FALSE;
432 }
433
434 if (lim.rlim_cur == RLIM_INFINITY || lim.rlim_cur >= desired)
435 {
436 /* not an error, everything is fine */
437 return TRUE;
438 }
439
440 /* Ignore "maximum limit", assume we have the "superuser"
441 * privileges. On Linux this is CAP_SYS_RESOURCE.
442 */
443 lim.rlim_cur = lim.rlim_max = desired;
444
445 if (setrlimit (RLIMIT_NOFILE, &lim) < 0)
446 {
447 dbus_set_error (error, _dbus_error_from_errno (errno),
448 "Failed to set fd limit to %u: %s",
449 desired, _dbus_strerror (errno));
450 return FALSE;
451 }
452
453 return TRUE;
454 }
455
456 dbus_bool_t
457 _dbus_rlimit_restore_fd_limit (DBusRLimit *saved,
458 DBusError *error)
459 {
460 if (setrlimit (RLIMIT_NOFILE, &saved->lim) < 0)
461 {
462 dbus_set_error (error, _dbus_error_from_errno (errno),
463 "Failed to restore old fd limit: %s",
464 _dbus_strerror (errno));
465 return FALSE;
466 }
467
468 return TRUE;
469 }
470
471 #else /* !HAVE_SETRLIMIT */
472
473 static void
474 fd_limit_not_supported (DBusError *error)
475 {
476 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED,
477 "cannot change fd limit on this platform");
478 }
479
480 DBusRLimit *
481 _dbus_rlimit_save_fd_limit (DBusError *error)
482 {
483 fd_limit_not_supported (error);
484 return NULL;
485 }
486
487 dbus_bool_t
488 _dbus_rlimit_raise_fd_limit_if_privileged (unsigned int desired,
489 DBusError *error)
490 {
491 fd_limit_not_supported (error);
492 return FALSE;
493 }
494
495 dbus_bool_t
496 _dbus_rlimit_restore_fd_limit (DBusRLimit *saved,
497 DBusError *error)
498 {
499 fd_limit_not_supported (error);
500 return FALSE;
501 }
502
503 #endif
504
505 void
506 _dbus_rlimit_free (DBusRLimit *lim)
507 {
508 dbus_free (lim);
509 }
510
516 void
517 _dbus_set_signal_handler (int sig,
518 DBusSignalHandler handler)
519 {
520 struct sigaction act;
521 sigset_t empty_mask;
522
523 sigemptyset (&empty_mask);
524 act.sa_handler = handler;
525 act.sa_mask = empty_mask;
526 act.sa_flags = 0;
527 sigaction (sig, &act, NULL);
528 }
529
535 dbus_bool_t
536 _dbus_file_exists (const char *file)
537 {
538 return (access (file, F_OK) == 0);
539 }
540
547 dbus_bool_t
548 _dbus_user_at_console (const char *username,
549 DBusError *error)
550 {
551 #ifdef DBUS_CONSOLE_AUTH_DIR
552 DBusString u, f;
553 dbus_bool_t result;
554
555 result = FALSE;
556 if (!_dbus_string_init (&f))
557 {
558 _DBUS_SET_OOM (error);
559 return FALSE;
560 }
561
562 if (!_dbus_string_append (&f, DBUS_CONSOLE_AUTH_DIR))
563 {
564 _DBUS_SET_OOM (error);
565 goto out;
566 }
567
568 _dbus_string_init_const (&u, username);
569
570 if (!_dbus_concat_dir_and_file (&f, &u))
571 {
572 _DBUS_SET_OOM (error);
573 goto out;
574 }
575
576 result = _dbus_file_exists (_dbus_string_get_const_data (&f));
577
578 out:
579 _dbus_string_free (&f);
580
581 return result;
582 #else
583 return FALSE;
584 #endif
585 }
586
587
594 dbus_bool_t
595 _dbus_path_is_absolute (const DBusString *filename)
596 {
597 if (_dbus_string_get_length (filename) > 0)
598 return _dbus_string_get_byte (filename, 0) == '/';
599 else
600 return FALSE;
601 }
602
611 dbus_bool_t
612 _dbus_stat (const DBusString *filename,
613 DBusStat *statbuf,
614 DBusError *error)
615 {
616 const char *filename_c;
617 struct stat sb;
618
619 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
620
621 filename_c = _dbus_string_get_const_data (filename);
622
623 if (stat (filename_c, &sb) < 0)
624 {
625 dbus_set_error (error, _dbus_error_from_errno (errno),
626 "%s", _dbus_strerror (errno));
627 return FALSE;
628 }
629
630 statbuf->mode = sb.st_mode;
631 statbuf->nlink = sb.st_nlink;
632 statbuf->uid = sb.st_uid;
633 statbuf->gid = sb.st_gid;
634 statbuf->size = sb.st_size;
635 statbuf->atime = sb.st_atime;
636 statbuf->mtime = sb.st_mtime;
637 statbuf->ctime = sb.st_ctime;
638
639 return TRUE;
640 }
641
642
646 struct DBusDirIter
647 {
648 DIR *d;
650 };
651
659 DBusDirIter*
660 _dbus_directory_open (const DBusString *filename,
661 DBusError *error)
662 {
663 DIR *d;
664 DBusDirIter *iter;
665 const char *filename_c;
666
667 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
668
669 filename_c = _dbus_string_get_const_data (filename);
670
671 d = opendir (filename_c);
672 if (d == NULL)
673 {
674 dbus_set_error (error, _dbus_error_from_errno (errno),
675 "Failed to read directory \"%s\": %s",
676 filename_c,
677 _dbus_strerror (errno));
678 return NULL;
679 }
680 iter = dbus_new0 (DBusDirIter, 1);
681 if (iter == NULL)
682 {
683 closedir (d);
684 dbus_set_error (error, DBUS_ERROR_NO_MEMORY,
685 "Could not allocate memory for directory iterator");
686 return NULL;
687 }
688
689 iter->d = d;
690
691 return iter;
692 }
693
707 dbus_bool_t
708 _dbus_directory_get_next_file (DBusDirIter *iter,
709 DBusString *filename,
710 DBusError *error)
711 {
712 struct dirent *ent;
713 int err;
714
715 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
716
717 again:
718 errno = 0;
719 ent = readdir (iter->d);
720
721 if (!ent)
722 {
723 err = errno;
724
725 if (err != 0)
726 dbus_set_error (error,
727 _dbus_error_from_errno (err),
728 "%s", _dbus_strerror (err));
729
730 return FALSE;
731 }
732 else if (ent->d_name[0] == '.' &&
733 (ent->d_name[1] == '\0' ||
734 (ent->d_name[1] == '.' && ent->d_name[2] == '\0')))
735 goto again;
736 else
737 {
738 _dbus_string_set_length (filename, 0);
739 if (!_dbus_string_append (filename, ent->d_name))
740 {
741 dbus_set_error (error, DBUS_ERROR_NO_MEMORY,
742 "No memory to read directory entry");
743 return FALSE;
744 }
745 else
746 {
747 return TRUE;
748 }
749 }
750 }
751
755 void
756 _dbus_directory_close (DBusDirIter *iter)
757 {
758 closedir (iter->d);
759 dbus_free (iter);
760 }
761
762 static dbus_bool_t
763 fill_user_info_from_group (struct group *g,
764 DBusGroupInfo *info,
765 DBusError *error)
766 {
767 _dbus_assert (g->gr_name != NULL);
768
769 info->gid = g->gr_gid;
770 info->groupname = _dbus_strdup (g->gr_name);
771
772 /* info->members = dbus_strdupv (g->gr_mem) */
773
774 if (info->groupname == NULL)
775 {
776 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
777 return FALSE;
778 }
779
780 return TRUE;
781 }
782
783 static dbus_bool_t
784 fill_group_info (DBusGroupInfo *info,
785 dbus_gid_t gid,
786 const DBusString *groupname,
787 DBusError *error)
788 {
789 const char *group_c_str;
790
791 _dbus_assert (groupname != NULL || gid != DBUS_GID_UNSET);
792 _dbus_assert (groupname == NULL || gid == DBUS_GID_UNSET);
793
794 if (groupname)
795 group_c_str = _dbus_string_get_const_data (groupname);
796 else
797 group_c_str = NULL;
798
799 /* For now assuming that the getgrnam() and getgrgid() flavors
800 * always correspond to the pwnam flavors, if not we have
801 * to add more configure checks.
802 */
803
804 #if defined (HAVE_POSIX_GETPWNAM_R) || defined (HAVE_NONPOSIX_GETPWNAM_R)
805 {
806 struct group *g;
807 int result;
808 size_t buflen;
809 char *buf;
810 struct group g_str;
811 dbus_bool_t b;
812
813 /* retrieve maximum needed size for buf */
814 buflen = sysconf (_SC_GETGR_R_SIZE_MAX);
815
816 /* sysconf actually returns a long, but everything else expects size_t,
817 * so just recast here.
818 * https://bugs.freedesktop.org/show_bug.cgi?id=17061
819 */
820 if ((long) buflen <= 0)
821 buflen = 1024;
822
823 result = -1;
824 while (1)
825 {
826 buf = dbus_malloc (buflen);
827 if (buf == NULL)
828 {
829 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
830 return FALSE;
831 }
832
833 g = NULL;
834 #ifdef HAVE_POSIX_GETPWNAM_R
835 if (group_c_str)
836 result = getgrnam_r (group_c_str, &g_str, buf, buflen,
837 &g);
838 else
839 result = getgrgid_r (gid, &g_str, buf, buflen,
840 &g);
841 #else
842 g = getgrnam_r (group_c_str, &g_str, buf, buflen);
843 result = 0;
844 #endif /* !HAVE_POSIX_GETPWNAM_R */
845 /* Try a bigger buffer if ERANGE was returned:
846 https://bugs.freedesktop.org/show_bug.cgi?id=16727
847 */
848 if (result == ERANGE && buflen < 512 * 1024)
849 {
850 dbus_free (buf);
851 buflen *= 2;
852 }
853 else
854 {
855 break;
856 }
857 }
858
859 if (result == 0 && g == &g_str)
860 {
861 b = fill_user_info_from_group (g, info, error);
862 dbus_free (buf);
863 return b;
864 }
865 else
866 {
867 dbus_set_error (error, _dbus_error_from_errno (errno),
868 "Group %s unknown or failed to look it up\n",
869 group_c_str ? group_c_str : "???");
870 dbus_free (buf);
871 return FALSE;
872 }
873 }
874 #else /* ! HAVE_GETPWNAM_R */
875 {
876 /* I guess we're screwed on thread safety here */
877 struct group *g;
878
879 g = getgrnam (group_c_str);
880
881 if (g != NULL)
882 {
883 return fill_user_info_from_group (g, info, error);
884 }
885 else
886 {
887 dbus_set_error (error, _dbus_error_from_errno (errno),
888 "Group %s unknown or failed to look it up\n",
889 group_c_str ? group_c_str : "???");
890 return FALSE;
891 }
892 }
893 #endif /* ! HAVE_GETPWNAM_R */
894 }
895
905 dbus_bool_t
906 _dbus_group_info_fill (DBusGroupInfo *info,
907 const DBusString *groupname,
908 DBusError *error)
909 {
910 return fill_group_info (info, DBUS_GID_UNSET,
911 groupname, error);
912
913 }
914
924 dbus_bool_t
925 _dbus_group_info_fill_gid (DBusGroupInfo *info,
926 dbus_gid_t gid,
927 DBusError *error)
928 {
929 return fill_group_info (info, gid, NULL, error);
930 }
931
940 dbus_bool_t
941 _dbus_parse_unix_user_from_config (const DBusString *username,
942 dbus_uid_t *uid_p)
943 {
944 return _dbus_get_user_id (username, uid_p);
945
946 }
947
956 dbus_bool_t
957 _dbus_parse_unix_group_from_config (const DBusString *groupname,
958 dbus_gid_t *gid_p)
959 {
960 return _dbus_get_group_id (groupname, gid_p);
961 }
962
973 dbus_bool_t
974 _dbus_unix_groups_from_uid (dbus_uid_t uid,
975 dbus_gid_t **group_ids,
976 int *n_group_ids)
977 {
978 return _dbus_groups_from_uid (uid, group_ids, n_group_ids);
979 }
980
990 dbus_bool_t
991 _dbus_unix_user_is_at_console (dbus_uid_t uid,
992 DBusError *error)
993 {
994 return _dbus_is_console_user (uid, error);
995
996 }
997
1005 dbus_bool_t
1006 _dbus_unix_user_is_process_owner (dbus_uid_t uid)
1007 {
1008 return uid == _dbus_geteuid ();
1009 }
1010
1018 dbus_bool_t
1019 _dbus_windows_user_is_process_owner (const char *windows_sid)
1020 {
1021 return FALSE;
1022 }
1023 /* End of DBusInternalsUtils functions */
1025
1037 dbus_bool_t
1038 _dbus_string_get_dirname (const DBusString *filename,
1039 DBusString *dirname)
1040 {
1041 int sep;
1042
1043 _dbus_assert (filename != dirname);
1044 _dbus_assert (filename != NULL);
1045 _dbus_assert (dirname != NULL);
1046
1047 /* Ignore any separators on the end */
1048 sep = _dbus_string_get_length (filename);
1049 if (sep == 0)
1050 return _dbus_string_append (dirname, "."); /* empty string passed in */
1051
1052 while (sep > 0 && _dbus_string_get_byte (filename, sep - 1) == '/')
1053 --sep;
1054
1055 _dbus_assert (sep >= 0);
1056
1057 if (sep == 0)
1058 return _dbus_string_append (dirname, "/");
1059
1060 /* Now find the previous separator */
1061 _dbus_string_find_byte_backward (filename, sep, '/', &sep);
1062 if (sep < 0)
1063 return _dbus_string_append (dirname, ".");
1064
1065 /* skip multiple separators */
1066 while (sep > 0 && _dbus_string_get_byte (filename, sep - 1) == '/')
1067 --sep;
1068
1069 _dbus_assert (sep >= 0);
1070
1071 if (sep == 0 &&
1072 _dbus_string_get_byte (filename, 0) == '/')
1073 return _dbus_string_append (dirname, "/");
1074 else
1075 return _dbus_string_copy_len (filename, 0, sep - 0,
1076 dirname, _dbus_string_get_length (dirname));
1077 } /* DBusString stuff */
1079
1080 static void
1081 string_squash_nonprintable (DBusString *str)
1082 {
1083 unsigned char *buf;
1084 int i, len;
1085
1086 buf = _dbus_string_get_udata (str);
1087 len = _dbus_string_get_length (str);
1088
1089 for (i = 0; i < len; i++)
1090 {
1091 unsigned char c = (unsigned char) buf[i];
1092 if (c == '\0')
1093 buf[i] = ' ';
1094 else if (c < 0x20 || c > 127)
1095 buf[i] = '?';
1096 }
1097 }
1098
1113 dbus_bool_t
1114 _dbus_command_for_pid (unsigned long pid,
1115 DBusString *str,
1116 int max_len,
1117 DBusError *error)
1118 {
1119 /* This is all Linux-specific for now */
1120 DBusString path;
1121 DBusString cmdline;
1122 int fd;
1123
1124 if (!_dbus_string_init (&path))
1125 {
1126 _DBUS_SET_OOM (error);
1127 return FALSE;
1128 }
1129
1130 if (!_dbus_string_init (&cmdline))
1131 {
1132 _DBUS_SET_OOM (error);
1133 _dbus_string_free (&path);
1134 return FALSE;
1135 }
1136
1137 if (!_dbus_string_append_printf (&path, "/proc/%ld/cmdline", pid))
1138 goto oom;
1139
1140 fd = open (_dbus_string_get_const_data (&path), O_RDONLY);
1141 if (fd < 0)
1142 {
1143 dbus_set_error (error,
1144 _dbus_error_from_errno (errno),
1145 "Failed to open \"%s\": %s",
1146 _dbus_string_get_const_data (&path),
1147 _dbus_strerror (errno));
1148 goto fail;
1149 }
1150
1151 if (!_dbus_read (fd, &cmdline, max_len))
1152 {
1153 dbus_set_error (error,
1154 _dbus_error_from_errno (errno),
1155 "Failed to read from \"%s\": %s",
1156 _dbus_string_get_const_data (&path),
1157 _dbus_strerror (errno));
1158 _dbus_close (fd, NULL);
1159 goto fail;
1160 }
1161
1162 if (!_dbus_close (fd, error))
1163 goto fail;
1164
1165 string_squash_nonprintable (&cmdline);
1166
1167 if (!_dbus_string_copy (&cmdline, 0, str, _dbus_string_get_length (str)))
1168 goto oom;
1169
1170 _dbus_string_free (&cmdline);
1171 _dbus_string_free (&path);
1172 return TRUE;
1173 oom:
1174 _DBUS_SET_OOM (error);
1175 fail:
1176 _dbus_string_free (&cmdline);
1177 _dbus_string_free (&path);
1178 return FALSE;
1179 }
1180
1189 dbus_bool_t
1190 _dbus_replace_install_prefix (DBusString *path)
1191 {
1192 return TRUE;
1193 }
1194
1195 static dbus_bool_t
1196 ensure_owned_directory (const char *label,
1197 const DBusString *string,
1198 dbus_bool_t create,
1199 DBusError *error)
1200 {
1201 const char *dir = _dbus_string_get_const_data (string);
1202 struct stat buf;
1203
1204 if (create && !_dbus_ensure_directory (string, error))
1205 return FALSE;
1206
1207 /*
1208 * The stat()-based checks in this function are to protect against
1209 * mistakes, not malice. We are working in a directory that is meant
1210 * to be trusted; but if a user has used `su` or similar to escalate
1211 * their privileges without correctly clearing the environment, the
1212 * XDG_RUNTIME_DIR in the environment might still be the user's
1213 * and not root's. We don't want to write root-owned files into that
1214 * directory, so just warn and don't provide support for transient
1215 * services in that case.
1216 *
1217 * In particular, we use stat() and not lstat() so that if we later
1218 * decide to use a different directory name for transient services,
1219 * we can drop in a compatibility symlink without breaking older
1220 * libdbus.
1221 */
1222
1223 if (stat (dir, &buf) != 0)
1224 {
1225 int saved_errno = errno;
1226
1227 dbus_set_error (error, _dbus_error_from_errno (saved_errno),
1228 "%s \"%s\" not available: %s", label, dir,
1229 _dbus_strerror (saved_errno));
1230 return FALSE;
1231 }
1232
1233 if (!S_ISDIR (buf.st_mode))
1234 {
1235 dbus_set_error (error, DBUS_ERROR_FAILED, "%s \"%s\" is not a directory",
1236 label, dir);
1237 return FALSE;
1238 }
1239
1240 if (buf.st_uid != geteuid ())
1241 {
1242 dbus_set_error (error, DBUS_ERROR_FAILED,
1243 "%s \"%s\" is owned by uid %ld, not our uid %ld",
1244 label, dir, (long) buf.st_uid, (long) geteuid ());
1245 return FALSE;
1246 }
1247
1248 /* This is just because we have the stat() results already, so we might
1249 * as well check opportunistically. */
1250 if ((S_IWOTH | S_IWGRP) & buf.st_mode)
1251 {
1252 dbus_set_error (error, DBUS_ERROR_FAILED,
1253 "%s \"%s\" can be written by others (mode 0%o)",
1254 label, dir, buf.st_mode);
1255 return FALSE;
1256 }
1257
1258 return TRUE;
1259 }
1260
1261 #define DBUS_UNIX_STANDARD_SESSION_SERVICEDIR "/dbus-1/services"
1262 #define DBUS_UNIX_STANDARD_SYSTEM_SERVICEDIR "/dbus-1/system-services"
1263
1271 dbus_bool_t
1272 _dbus_set_up_transient_session_servicedirs (DBusList **dirs,
1273 DBusError *error)
1274 {
1275 const char *xdg_runtime_dir;
1276 DBusString services;
1277 DBusString dbus1;
1278 DBusString xrd;
1279 dbus_bool_t ret = FALSE;
1280 char *data = NULL;
1281
1282 if (!_dbus_string_init (&dbus1))
1283 {
1284 _DBUS_SET_OOM (error);
1285 return FALSE;
1286 }
1287
1288 if (!_dbus_string_init (&services))
1289 {
1290 _dbus_string_free (&dbus1);
1291 _DBUS_SET_OOM (error);
1292 return FALSE;
1293 }
1294
1295 if (!_dbus_string_init (&xrd))
1296 {
1297 _dbus_string_free (&dbus1);
1298 _dbus_string_free (&services);
1299 _DBUS_SET_OOM (error);
1300 return FALSE;
1301 }
1302
1303 xdg_runtime_dir = _dbus_getenv ("XDG_RUNTIME_DIR");
1304
1305 /* Not an error, we just can't have transient session services */
1306 if (xdg_runtime_dir == NULL)
1307 {
1308 _dbus_verbose ("XDG_RUNTIME_DIR is unset: transient session services "
1309 "not available here\n");
1310 ret = TRUE;
1311 goto out;
1312 }
1313
1314 if (!_dbus_string_append (&xrd, xdg_runtime_dir) ||
1315 !_dbus_string_append_printf (&dbus1, "%s/dbus-1",
1316 xdg_runtime_dir) ||
1317 !_dbus_string_append_printf (&services, "%s/dbus-1/services",
1318 xdg_runtime_dir))
1319 {
1320 _DBUS_SET_OOM (error);
1321 goto out;
1322 }
1323
1324 if (!ensure_owned_directory ("XDG_RUNTIME_DIR", &xrd, FALSE, error) ||
1325 !ensure_owned_directory ("XDG_RUNTIME_DIR subdirectory", &dbus1, TRUE,
1326 error) ||
1327 !ensure_owned_directory ("XDG_RUNTIME_DIR subdirectory", &services,
1328 TRUE, error))
1329 goto out;
1330
1331 if (!_dbus_string_steal_data (&services, &data) ||
1332 !_dbus_list_append (dirs, data))
1333 {
1334 _DBUS_SET_OOM (error);
1335 goto out;
1336 }
1337
1338 _dbus_verbose ("Transient service directory is %s\n", data);
1339 /* Ownership was transferred to @dirs */
1340 data = NULL;
1341 ret = TRUE;
1342
1343 out:
1344 _dbus_string_free (&dbus1);
1345 _dbus_string_free (&services);
1346 _dbus_string_free (&xrd);
1347 dbus_free (data);
1348 return ret;
1349 }
1350
1368 dbus_bool_t
1369 _dbus_get_standard_session_servicedirs (DBusList **dirs)
1370 {
1371 const char *xdg_data_home;
1372 const char *xdg_data_dirs;
1373 DBusString servicedir_path;
1374
1375 if (!_dbus_string_init (&servicedir_path))
1376 return FALSE;
1377
1378 xdg_data_home = _dbus_getenv ("XDG_DATA_HOME");
1379 xdg_data_dirs = _dbus_getenv ("XDG_DATA_DIRS");
1380
1381 if (xdg_data_home != NULL)
1382 {
1383 if (!_dbus_string_append (&servicedir_path, xdg_data_home))
1384 goto oom;
1385 }
1386 else
1387 {
1388 const DBusString *homedir;
1389 DBusString local_share;
1390
1391 if (!_dbus_homedir_from_current_process (&homedir))
1392 goto oom;
1393
1394 if (!_dbus_string_append (&servicedir_path, _dbus_string_get_const_data (homedir)))
1395 goto oom;
1396
1397 _dbus_string_init_const (&local_share, "/.local/share");
1398 if (!_dbus_concat_dir_and_file (&servicedir_path, &local_share))
1399 goto oom;
1400 }
1401
1402 if (!_dbus_string_append (&servicedir_path, ":"))
1403 goto oom;
1404
1405 if (xdg_data_dirs != NULL)
1406 {
1407 if (!_dbus_string_append (&servicedir_path, xdg_data_dirs))
1408 goto oom;
1409
1410 if (!_dbus_string_append (&servicedir_path, ":"))
1411 goto oom;
1412 }
1413 else
1414 {
1415 if (!_dbus_string_append (&servicedir_path, "/usr/local/share:/usr/share:"))
1416 goto oom;
1417 }
1418
1419 /*
1420 * add configured datadir to defaults
1421 * this may be the same as an xdg dir
1422 * however the config parser should take
1423 * care of duplicates
1424 */
1425 if (!_dbus_string_append (&servicedir_path, DBUS_DATADIR))
1426 goto oom;
1427
1428 if (!_dbus_split_paths_and_append (&servicedir_path,
1429 DBUS_UNIX_STANDARD_SESSION_SERVICEDIR,
1430 dirs))
1431 goto oom;
1432
1433 _dbus_string_free (&servicedir_path);
1434 return TRUE;
1435
1436 oom:
1437 _dbus_string_free (&servicedir_path);
1438 return FALSE;
1439 }
1440
1441
1460 dbus_bool_t
1461 _dbus_get_standard_system_servicedirs (DBusList **dirs)
1462 {
1463 /*
1464 * DBUS_DATADIR may be the same as one of the standard directories. However,
1465 * the config parser should take care of the duplicates.
1466 *
1467 * Also, append /lib as counterpart of /usr/share on the root
1468 * directory (the root directory does not know /share), in order to
1469 * facilitate early boot system bus activation where /usr might not
1470 * be available.
1471 */
1472 static const char standard_search_path[] =
1473 "/usr/local/share:"
1474 "/usr/share:"
1475 DBUS_DATADIR ":"
1476 "/lib";
1477 DBusString servicedir_path;
1478
1479 _dbus_string_init_const (&servicedir_path, standard_search_path);
1480
1481 return _dbus_split_paths_and_append (&servicedir_path,
1482 DBUS_UNIX_STANDARD_SYSTEM_SERVICEDIR,
1483 dirs);
1484 }
1485
1494 dbus_bool_t
1495 _dbus_get_system_config_file (DBusString *str)
1496 {
1497 _dbus_assert (_dbus_string_get_length (str) == 0);
1498
1499 return _dbus_string_append (str, DBUS_SYSTEM_CONFIG_FILE);
1500 }
1501
1508 dbus_bool_t
1509 _dbus_get_session_config_file (DBusString *str)
1510 {
1511 _dbus_assert (_dbus_string_get_length (str) == 0);
1512
1513 return _dbus_string_append (str, DBUS_SESSION_CONFIG_FILE);
1514 }
_dbus_string_append
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:935
_dbus_split_paths_and_append
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:228
DBusError::message
const char * message
public error message field
Definition: dbus-errors.h:51
NULL
#define NULL
A null pointer, defined appropriately for C or C++.
_dbus_become_daemon
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.
Definition: dbus-sysdeps-util-unix.c:82
_dbus_unix_user_is_at_console
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.
Definition: dbus-sysdeps-util-unix.c:991
_dbus_group_info_fill_gid
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...
Definition: dbus-sysdeps-util-unix.c:925
_dbus_string_get_dirname
dbus_bool_t _dbus_string_get_dirname(const DBusString *filename, DBusString *dirname)
Get the directory name from a complete filename.
Definition: dbus-sysdeps-util-unix.c:1038
_dbus_ensure_directory
dbus_bool_t _dbus_ensure_directory(const DBusString *filename, DBusError *error)
Creates a directory; succeeds if the directory is created or already existed.
Definition: dbus-sysdeps-unix.c:2957
dbus_free
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
Definition: dbus-memory.c:702
_dbus_path_is_absolute
dbus_bool_t _dbus_path_is_absolute(const DBusString *filename)
Checks whether the filename is an absolute path.
Definition: dbus-sysdeps-util-unix.c:595
DBusStat
Portable struct with stat() results.
Definition: dbus-sysdeps.h:501
_dbus_ensure_standard_fds
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 ...
Definition: dbus-sysdeps-unix.c:155
DBUS_ERROR_NOT_SUPPORTED
#define DBUS_ERROR_NOT_SUPPORTED
Requested operation isn&#39;t supported (like ENOSYS on UNIX).
Definition: dbus-protocol.h:369
_dbus_string_append_int
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_string_append_int(DBusString *str, long value)
Appends an integer to a DBusString.
Definition: dbus-sysdeps.c:356
_dbus_groups_from_uid
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.
Definition: dbus-userdb-util.c:388
_dbus_parse_unix_group_from_config
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.
Definition: dbus-sysdeps-util-unix.c:957
_dbus_directory_close
void _dbus_directory_close(DBusDirIter *iter)
Closes a directory iteration.
Definition: dbus-sysdeps-util-unix.c:756
_dbus_is_console_user
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.
Definition: dbus-userdb-util.c:49
_dbus_assert
#define _dbus_assert(condition)
Aborts with an error message if the condition is false.
Definition: dbus-internals.h:152
_dbus_directory_get_next_file
dbus_bool_t _dbus_directory_get_next_file(DBusDirIter *iter, DBusString *filename, DBusError *error)
Get next file in the directory.
Definition: dbus-sysdeps-util-unix.c:708
DBusStat::atime
unsigned long atime
Access time.
Definition: dbus-sysdeps.h:508
_dbus_get_standard_session_servicedirs
dbus_bool_t _dbus_get_standard_session_servicedirs(DBusList **dirs)
Returns the standard directories for a session bus to look for service activation files...
Definition: dbus-sysdeps-util-unix.c:1369
_dbus_concat_dir_and_file
dbus_bool_t _dbus_concat_dir_and_file(DBusString *dir, const DBusString *next_component)
Appends the given filename to the given directory.
Definition: dbus-sysdeps-unix.c:3020
_dbus_directory_open
DBusDirIter * _dbus_directory_open(const DBusString *filename, DBusError *error)
Open a directory to iterate over.
Definition: dbus-sysdeps-util-unix.c:660
_dbus_string_init
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition: dbus-string.c:175
_dbus_command_for_pid
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.
Definition: dbus-sysdeps-util-unix.c:1114
_dbus_get_system_config_file
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...
Definition: dbus-sysdeps-util-unix.c:1495
_dbus_string_copy
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&#39;s copied to the d...
Definition: dbus-string.c:1283
DBusGroupInfo::groupname
char * groupname
Group name.
Definition: dbus-sysdeps-unix.h:122
_dbus_error_from_errno
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:592
DBusDirIter
Internals of directory iterator.
Definition: dbus-sysdeps-util-unix.c:646
DBusStat::mode
unsigned long mode
File mode.
Definition: dbus-sysdeps.h:503
dbus_pid_t
unsigned long dbus_pid_t
A process ID.
Definition: dbus-sysdeps.h:106
_dbus_get_user_id_and_primary_group
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.
Definition: dbus-userdb-util.c:199
_dbus_change_to_daemon_user
dbus_bool_t _dbus_change_to_daemon_user(const char *user, DBusError *error)
Changes the user and group the bus is running as.
Definition: dbus-sysdeps-util-unix.c:324
DBusDirIter::d
DIR * d
The DIR* from opendir()
Definition: dbus-sysdeps-util-unix.c:648
dbus_malloc
void * dbus_malloc(size_t bytes)
Allocates the given number of bytes, as with standard malloc().
Definition: dbus-memory.c:462
DBusStat::gid
dbus_gid_t gid
Group owning file.
Definition: dbus-sysdeps.h:506
dbus_new0
#define dbus_new0(type, count)
Safe macro for using dbus_malloc0().
Definition: dbus-memory.h:59
DBusPipe
Definition: dbus-pipe.h:41
DBusString
Definition: dbus-string.h:42
dbus_bool_t
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition: dbus-types.h:35
_dbus_string_init_const
void _dbus_string_init_const(DBusString *str, const char *value)
Initializes a constant string.
Definition: dbus-string.c:190
_dbus_get_session_config_file
dbus_bool_t _dbus_get_session_config_file(DBusString *str)
Get the absolute path of the session.conf file.
Definition: dbus-sysdeps-util-unix.c:1509
_dbus_warn
void _dbus_warn(const char *format,...)
Prints a warning message to stderr.
Definition: dbus-internals.c:230
_dbus_list_append
dbus_bool_t _dbus_list_append(DBusList **list, void *data)
Appends a value to the list.
Definition: dbus-list.c:270
_dbus_read
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...
Definition: dbus-sysdeps-unix.c:704
_dbus_string_append_printf
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:1114
_dbus_group_info_fill
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...
Definition: dbus-sysdeps-util-unix.c:906
_dbus_get_group_id
dbus_bool_t _dbus_get_group_id(const DBusString *groupname, dbus_gid_t *gid)
Gets group ID given groupname.
Definition: dbus-userdb-util.c:160
DBusError
Object representing an exception.
Definition: dbus-errors.h:48
dbus_set_error
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:354
_dbus_unix_groups_from_uid
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.
Definition: dbus-sysdeps-util-unix.c:974
DBusStat::ctime
unsigned long ctime
Creation time.
Definition: dbus-sysdeps.h:510
_dbus_string_free
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init().
Definition: dbus-string.c:259
DBUS_GID_UNSET
#define DBUS_GID_UNSET
an invalid GID used to represent an uninitialized dbus_gid_t field
Definition: dbus-sysdeps.h:117
_dbus_geteuid
dbus_uid_t _dbus_geteuid(void)
Gets our effective UID.
Definition: dbus-sysdeps-unix.c:2681
_dbus_file_exists
dbus_bool_t _dbus_file_exists(const char *file)
Checks if a file exists.
Definition: dbus-sysdeps-util-unix.c:536
TRUE
#define TRUE
Expands to "1".
DBusStat::nlink
unsigned long nlink
Number of hard links.
Definition: dbus-sysdeps.h:504
_dbus_assert_not_reached
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called.
Definition: dbus-internals.h:163
_dbus_write_pid_to_file_and_pipe
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).
Definition: dbus-sysdeps-util-unix.c:230
DBusStat::uid
dbus_uid_t uid
User owning file.
Definition: dbus-sysdeps.h:505
DBUS_ERROR_FAILED
#define DBUS_ERROR_FAILED
A generic error; "something went wrong" - see the error message for more.
Definition: dbus-protocol.h:355
_dbus_verify_daemon_user
dbus_bool_t _dbus_verify_daemon_user(const char *user)
Verify that after the fork we can successfully change to this user.
Definition: dbus-sysdeps-util-unix.c:304
_dbus_string_find_byte_backward
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.
Definition: dbus-string-util.c:90
_dbus_homedir_from_current_process
dbus_bool_t _dbus_homedir_from_current_process(const DBusString **homedir)
Gets homedir of user owning current process.
Definition: dbus-userdb.c:395
DBusGroupInfo
Information about a UNIX group.
Definition: dbus-sysdeps-unix.h:119
_dbus_stat
dbus_bool_t _dbus_stat(const DBusString *filename, DBusStat *statbuf, DBusError *error)
stat() wrapper.
Definition: dbus-sysdeps-util-unix.c:612
_dbus_get_user_id
dbus_bool_t _dbus_get_user_id(const DBusString *username, dbus_uid_t *uid)
Gets user ID given username.
Definition: dbus-userdb-util.c:146
_dbus_set_signal_handler
void _dbus_set_signal_handler(int sig, DBusSignalHandler handler)
Installs a UNIX signal handler.
Definition: dbus-sysdeps-util-unix.c:517
DBusList
A node in a linked list.
Definition: dbus-list.h:34
_dbus_unix_user_is_process_owner
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.
Definition: dbus-sysdeps-util-unix.c:1006
_dbus_replace_install_prefix
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...
Definition: dbus-sysdeps-util-unix.c:1190
_dbus_user_at_console
dbus_bool_t _dbus_user_at_console(const char *username, DBusError *error)
Checks if user is at the console.
Definition: dbus-sysdeps-util-unix.c:548
_dbus_windows_user_is_process_owner
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.
Definition: dbus-sysdeps-util-unix.c:1019
_dbus_set_up_transient_session_servicedirs
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...
Definition: dbus-sysdeps-util-unix.c:1272
DBUS_ERROR_NO_MEMORY
#define DBUS_ERROR_NO_MEMORY
There was not enough memory to complete an operation.
Definition: dbus-protocol.h:357
_dbus_close
dbus_bool_t _dbus_close(int fd, DBusError *error)
Closes a file descriptor.
Definition: dbus-sysdeps-unix.c:3214
FALSE
#define FALSE
Expands to "0".
DBusStat::mtime
unsigned long mtime
Modify time.
Definition: dbus-sysdeps.h:509
_dbus_string_set_length
dbus_bool_t _dbus_string_set_length(DBusString *str, int length)
Sets the length of a string.
Definition: dbus-string.c:802
_dbus_string_copy_len
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:1375
_dbus_string_steal_data
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:641
DBusGroupInfo::gid
dbus_gid_t gid
GID.
Definition: dbus-sysdeps-unix.h:121
DBusSignalHandler
void(* DBusSignalHandler)(int sig)
A UNIX signal handler.
Definition: dbus-sysdeps-unix.h:169
dbus_gid_t
unsigned long dbus_gid_t
A group ID.
Definition: dbus-sysdeps.h:110
DBusStat::size
unsigned long size
Size of file.
Definition: dbus-sysdeps.h:507
_dbus_parse_unix_user_from_config
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.
Definition: dbus-sysdeps-util-unix.c:941
_dbus_strdup
char * _dbus_strdup(const char *str)
Duplicates a string.
Definition: dbus-internals.c:536
_dbus_getenv
const char * _dbus_getenv(const char *varname)
Wrapper for getenv().
Definition: dbus-sysdeps.c:187
dbus_uid_t
unsigned long dbus_uid_t
A user ID.
Definition: dbus-sysdeps.h:108
_dbus_get_standard_system_servicedirs
dbus_bool_t _dbus_get_standard_system_servicedirs(DBusList **dirs)
Returns the standard directories for a system bus to look for service activation files.
Definition: dbus-sysdeps-util-unix.c:1461
dbus_error_is_set
dbus_bool_t dbus_error_is_set(const DBusError *error)
Checks whether an error occurred (the error is set).
Definition: dbus-errors.c:329