D-Bus  1.16.2
dbus-sysdeps.h
1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-sysdeps.h Wrappers around system/libc features (internal to D-Bus implementation)
3  *
4  * Copyright (C) 2002, 2003 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 #ifndef DBUS_SYSDEPS_H
28 #define DBUS_SYSDEPS_H
29 
30 #ifndef VERSION
31 #warning Please include config.h before dbus-sysdeps.h
32 #include "config.h"
33 #endif
34 
35 #include <stdint.h>
36 
37 #ifdef HAVE_INTTYPES_H
38 #include <inttypes.h>
39 #endif
40 
41 #ifdef HAVE_STDATOMIC_H
42 #include <stdatomic.h>
43 #endif
44 
45 #include <dbus/dbus-errors.h>
46 #include <dbus/dbus-file.h>
47 #include <dbus/dbus-string.h>
48 
49 /* this is perhaps bogus, but strcmp() etc. are faster if we use the
50  * stuff straight out of string.h, so have this here for now.
51  */
52 #include <string.h>
53 #include <stdarg.h>
54 
55 #if !defined(BROKEN_POLL) && (defined(__APPLE__) || defined(__INTERIX))
56  /* Following libcurl's example, we blacklist poll() on Darwin
57  * (macOS, iOS, etc.) and Interix due to a history of implementation
58  * issues.
59  * https://github.com/curl/curl/blob/master/m4/curl-functions.m4
60  *
61  * On unspecified older macOS versions, poll() failed if given a
62  * device node to poll.
63  *
64  * On macOS < 10.9, poll() with nfds=0 failed instead of waiting for
65  * the timeout and then succeeding.
66  *
67  * On macOS >= 10.12, poll() with nfds=0 succeeded immediately
68  * instead of waiting for the timeout, resulting in busy-looping.
69  *
70  * On Interix, poll() apparently only works for files in /proc.
71  *
72  * The "legacy" build flavour in our CI machinery defines BROKEN_POLL
73  * on whatever platform is in use (normally Linux) to force use of the
74  * same select()-based poll() emulation that we use for macOS, Interix,
75  * and any platform that lacks a real poll(), so that we can test it
76  * more regularly.
77  */
78 # define BROKEN_POLL
79 #endif
80 
81 /* Normally we'd only include this in dbus-sysdeps-unix.c.
82  * However, the member names in DBusPollFD are (deliberately) the same as
83  * in POSIX struct pollfd, and AIX's poll() implementation is known to
84  * do things like "#define events reqevents", which would break that approach.
85  * Defend against that by ensuring that if it's renamed anywhere, it's renamed
86  * everywhere.
87  */
88 #ifdef HAVE_POLL
89 #include <poll.h>
90 #endif
91 
92 #ifdef DBUS_WINCE
93 /* Windows CE lacks some system functions (such as errno and clock).
94  We bring them in here. */
95 #include "dbus-sysdeps-wince-glue.h"
96 #endif
97 
98 #ifdef DBUS_WIN
99 #include <ws2tcpip.h>
100 #endif
101 
103 
104 #ifdef DBUS_WIN
105 #define _DBUS_PATH_SEPARATOR ";"
106 #else
107 #define _DBUS_PATH_SEPARATOR ":"
108 #endif
109 
110 /* Forward declarations */
111 
112 
114 typedef struct DBusList DBusList;
115 
117 typedef struct DBusCredentials DBusCredentials;
118 
120 typedef struct DBusPipe DBusPipe;
121 
128 DBUS_PRIVATE_EXPORT
129 void _dbus_abort (void) _DBUS_GNUC_NORETURN;
130 
132 DBUS_PRIVATE_EXPORT
133 const char* _dbus_getenv (const char *varname);
134 DBUS_PRIVATE_EXPORT
136 char ** _dbus_get_environment (void);
137 
139 typedef unsigned long dbus_pid_t;
141 typedef unsigned long dbus_uid_t;
143 typedef unsigned long dbus_gid_t;
144 
146 #define DBUS_PID_UNSET ((dbus_pid_t) -1)
147 
148 #define DBUS_UID_UNSET ((dbus_uid_t) -1)
149 
150 #define DBUS_GID_UNSET ((dbus_gid_t) -1)
151 
153 #define DBUS_PID_FORMAT "%lu"
154 
155 #define DBUS_UID_FORMAT "%lu"
156 
157 #define DBUS_GID_FORMAT "%lu"
158 
162 #ifdef DBUS_WIN
163 
164 typedef struct { SOCKET sock; } DBusSocket;
165 # define DBUS_SOCKET_FORMAT "Iu"
166 # define DBUS_SOCKET_INIT { INVALID_SOCKET }
167 
168 _DBUS_WARN_UNUSED_RESULT
169 static inline SOCKET
170 _dbus_socket_printable (DBusSocket s) { return s.sock; }
171 
172 _DBUS_WARN_UNUSED_RESULT
173 static inline dbus_bool_t
174 _dbus_socket_is_valid (DBusSocket s) { return s.sock != INVALID_SOCKET; }
175 
176 static inline void
177 _dbus_socket_invalidate (DBusSocket *s) { s->sock = INVALID_SOCKET; }
178 
179 _DBUS_WARN_UNUSED_RESULT
180 static inline int
181 _dbus_socket_get_int (DBusSocket s) { return (int)s.sock; }
182 
183 #else /* not DBUS_WIN */
184 
185 typedef struct { int fd; } DBusSocket;
186 # define DBUS_SOCKET_FORMAT "d"
187 # define DBUS_SOCKET_INIT { -1 }
188 
189 _DBUS_WARN_UNUSED_RESULT
190 static inline int
191 _dbus_socket_printable (DBusSocket s) { return s.fd; }
192 
193 _DBUS_WARN_UNUSED_RESULT
194 static inline dbus_bool_t
195 _dbus_socket_is_valid (DBusSocket s) { return s.fd >= 0; }
196 
197 static inline void
198 _dbus_socket_invalidate (DBusSocket *s) { s->fd = -1; }
199 
200 _DBUS_WARN_UNUSED_RESULT
201 static inline int
202 _dbus_socket_get_int (DBusSocket s) { return s.fd; }
203 
204 #endif /* not DBUS_WIN */
205 
206 _DBUS_WARN_UNUSED_RESULT
207 static inline DBusSocket
208 _dbus_socket_get_invalid (void)
209 {
210  DBusSocket s = DBUS_SOCKET_INIT;
211 
212  return s;
213 }
214 
216  DBusError *error);
217 
218 DBUS_PRIVATE_EXPORT
220  DBusError *error);
221 DBUS_PRIVATE_EXPORT
223  DBusString *buffer,
224  int count);
225 DBUS_PRIVATE_EXPORT
227  const DBusString *buffer,
228  int start,
229  int len);
231  const DBusString *buffer1,
232  int start1,
233  int len1,
234  const DBusString *buffer2,
235  int start2,
236  int len2);
237 
239  DBusString *buffer,
240  int count,
241  int *fds,
242  unsigned int *n_fds);
243 DBUS_PRIVATE_EXPORT
244 int _dbus_write_socket_with_unix_fds (DBusSocket fd,
245  const DBusString *buffer,
246  int start,
247  int len,
248  const int *fds,
249  int n_fds);
250 int _dbus_write_socket_with_unix_fds_two (DBusSocket fd,
251  const DBusString *buffer1,
252  int start1,
253  int len1,
254  const DBusString *buffer2,
255  int start2,
256  int len2,
257  const int *fds,
258  int n_fds);
259 
260 DBusSocket _dbus_connect_tcp_socket (const char *host,
261  const char *port,
262  const char *family,
263  DBusError *error);
264 DBusSocket _dbus_connect_tcp_socket_with_nonce (const char *host,
265  const char *port,
266  const char *family,
267  const char *noncefile,
268  DBusError *error);
269 int _dbus_listen_tcp_socket (const char *host,
270  const char *port,
271  const char *family,
272  DBusString *retport,
273  const char **retfamily,
274  DBusSocket **fds_p,
275  DBusError *error);
277 
279  DBusCredentials *credentials,
280  DBusError *error);
282  DBusError *error);
283 
284 typedef enum
285 {
286  DBUS_CREDENTIALS_ADD_FLAGS_USER_DATABASE = (1 << 0),
287  DBUS_CREDENTIALS_ADD_FLAGS_NONE = 0
288 } DBusCredentialsAddFlags;
289 
291  const DBusString *username,
292  DBusCredentialsAddFlags flags,
293  DBusError *error);
294 
296 DBUS_PRIVATE_EXPORT
298 
300  dbus_uid_t *uid_p);
302  dbus_gid_t *gid_p);
304  dbus_gid_t **group_ids,
305  int *n_group_ids,
306  DBusError *error);
308  DBusError *error);
310 dbus_bool_t _dbus_windows_user_is_process_owner (const char *windows_sid);
311 
313  DBusCredentials *credentials);
314 
316 
318 
319 /* PID FDs are Linux-specific. */
320 #ifdef DBUS_WIN
321 static inline dbus_pid_t _dbus_resolve_pid_fd (int pid_fd)
322 {
323  return DBUS_PID_UNSET;
324 }
325 
326 #else
327 DBUS_PRIVATE_EXPORT
328 dbus_pid_t _dbus_resolve_pid_fd (int pid_fd);
329 #endif
330 
334 typedef struct DBusAtomic DBusAtomic;
335 
340 {
341 #ifdef HAVE_STDATOMIC_H
342  atomic_int value;
343 #elif defined(DBUS_WIN)
344  volatile long value;
345 #else
346  volatile dbus_int32_t value;
347 #endif
348 };
349 
350 DBUS_PRIVATE_EXPORT
352 DBUS_PRIVATE_EXPORT
354 DBUS_PRIVATE_EXPORT
356 DBUS_PRIVATE_EXPORT
357 void _dbus_atomic_set_zero (DBusAtomic *atomic);
358 DBUS_PRIVATE_EXPORT
359 void _dbus_atomic_set_nonzero (DBusAtomic *atomic);
360 
361 #ifdef DBUS_WIN
362 
363 /* On Windows, you can only poll sockets. We emulate Unix poll() using
364  * select(), so it doesn't matter what precise type we put in DBusPollFD;
365  * use DBusSocket so that the compiler can check we are doing it right.
366  */
367 typedef DBusSocket DBusPollable;
368 # define DBUS_POLLABLE_FORMAT "Iu"
369 
370 static inline DBusPollable
371 _dbus_socket_get_pollable (DBusSocket s) { return s; }
372 
373 static inline SOCKET
374 _dbus_pollable_printable (DBusPollable p) { return p.sock; }
375 
376 static inline dbus_bool_t
377 _dbus_pollable_is_valid (DBusPollable p) { return _dbus_socket_is_valid (p); }
378 
379 static inline void
380 _dbus_pollable_invalidate (DBusPollable *p) { _dbus_socket_invalidate (p); }
381 
382 static inline dbus_bool_t
383 _dbus_pollable_equals (DBusPollable a, DBusPollable b) { return a.sock == b.sock; }
384 
385 #else /* !DBUS_WIN */
386 
387 /* On Unix, you can poll sockets, pipes, etc., and we must put exactly
388  * "int" in DBusPollFD because we're relying on its layout exactly matching
389  * struct pollfd. (This is silly, and one day we should use a better
390  * abstraction.)
391  */
392 typedef int DBusPollable;
393 # define DBUS_POLLABLE_FORMAT "d"
394 
395 static inline DBusPollable
396 _dbus_socket_get_pollable (DBusSocket s) { return s.fd; }
397 
398 static inline int
399 _dbus_pollable_printable (DBusPollable p) { return p; }
400 
401 static inline dbus_bool_t
402 _dbus_pollable_is_valid (DBusPollable p) { return p >= 0; }
403 
404 static inline void
405 _dbus_pollable_invalidate (DBusPollable *p) { *p = -1; }
406 
407 static inline dbus_bool_t
408 _dbus_pollable_equals (DBusPollable a, DBusPollable b) { return a == b; }
409 
410 #endif /* !DBUS_WIN */
411 
412 #if defined(HAVE_POLL) && !defined(BROKEN_POLL)
413 
417 typedef struct pollfd DBusPollFD;
418 
420 #define _DBUS_POLLIN POLLIN
421 
422 #define _DBUS_POLLPRI POLLPRI
423 
424 #define _DBUS_POLLOUT POLLOUT
425 
426 #define _DBUS_POLLERR POLLERR
427 
428 #define _DBUS_POLLHUP POLLHUP
429 
430 #define _DBUS_POLLNVAL POLLNVAL
431 #else
432 /* Emulate poll() via select(). Because we aren't really going to call
433  * poll(), any similarly-shaped struct is acceptable, and any power of 2
434  * will do for the events/revents; these values happen to match Linux
435  * and *BSD. */
436 typedef struct
437 {
438  DBusPollable fd;
439  short events;
440  short revents;
441 } DBusPollFD;
442 
444 #define _DBUS_POLLIN 0x0001
445 
446 #define _DBUS_POLLPRI 0x0002
447 
448 #define _DBUS_POLLOUT 0x0004
449 
450 #define _DBUS_POLLERR 0x0008
451 
452 #define _DBUS_POLLHUP 0x0010
453 
454 #define _DBUS_POLLNVAL 0x0020
455 #endif
456 
457 DBUS_PRIVATE_EXPORT
458 int _dbus_poll (DBusPollFD *fds,
459  int n_fds,
460  int timeout_milliseconds);
461 
462 DBUS_PRIVATE_EXPORT
463 void _dbus_sleep_milliseconds (int milliseconds);
464 
465 DBUS_PRIVATE_EXPORT
467  long *tv_usec);
468 
469 DBUS_PRIVATE_EXPORT
470 void _dbus_get_real_time (dbus_int64_t *tv_sec,
471  long *tv_usec);
472 
476 DBUS_PRIVATE_EXPORT
478  DBusError *error);
479 DBUS_PRIVATE_EXPORT
481  DBusError *error);
482 DBUS_PRIVATE_EXPORT
484  DBusError *error);
485 
486 DBUS_PRIVATE_EXPORT
488  const DBusString *next_component);
490  DBusString *dirname);
491 DBUS_PRIVATE_EXPORT
493 
498  DBusError *error);
499 
502 
504 typedef struct DBusDirIter DBusDirIter;
505 
507  DBusError *error);
509  DBusString *filename,
510  DBusError *error);
512 
514  DBusError *error);
515 
516 DBUS_PRIVATE_EXPORT
517 const char* _dbus_get_tmpdir (void);
518 
522 _DBUS_WARN_UNUSED_RESULT
524  int n_bytes,
525  DBusError *error);
527  int n_bytes,
528  DBusError *error);
529 DBUS_PRIVATE_EXPORT
531  int n_bytes,
532  DBusError *error);
533 
534 DBUS_PRIVATE_EXPORT
535 const char* _dbus_error_from_errno (int error_number);
536 DBUS_PRIVATE_EXPORT
537 const char* _dbus_error_from_system_errno (void);
538 
539 int _dbus_get_low_level_socket_errno (void);
540 
541 int _dbus_save_socket_errno (void);
542 void _dbus_restore_socket_errno (int saved_errno);
543 void _dbus_set_errno_to_zero (void);
549 DBUS_PRIVATE_EXPORT
550 const char* _dbus_strerror_from_errno (void);
551 
552 void _dbus_disable_sigpipe (void);
553 
554 DBUS_PRIVATE_EXPORT
555 void _dbus_exit (int code) _DBUS_GNUC_NORETURN;
556 
557 DBUS_PRIVATE_EXPORT
558 int _dbus_printf_string_upper_bound (const char *format,
559  va_list args) _DBUS_GNUC_PRINTF (1, 0);
560 
561 #ifdef DBUS_ENABLE_VERBOSE_MODE
562 DBUS_PRIVATE_EXPORT
563 void _dbus_print_thread (void);
564 #endif
565 
569 typedef struct
570 {
571  unsigned long mode;
572  unsigned long nlink;
573  dbus_uid_t uid;
574  dbus_gid_t gid;
575  unsigned long size;
576  unsigned long atime;
577  unsigned long mtime;
578  unsigned long ctime;
579 } DBusStat;
580 
581 dbus_bool_t _dbus_stat (const DBusString *filename,
582  DBusStat *statbuf,
583  DBusError *error);
584 
585 DBusSocket _dbus_connect_unix_socket (const char *path,
586  dbus_bool_t abstract,
587  DBusError *error);
588 DBusSocket _dbus_listen_unix_socket (const char *path,
589  dbus_bool_t abstract,
590  DBusError *error);
591 
592 DBusSocket _dbus_connect_exec (const char *path,
593  char *const argv[],
594  DBusError *error);
595 
596 DBUS_PRIVATE_EXPORT
598  DBusSocket *fd2,
599  dbus_bool_t blocking,
600  DBusError *error);
601 
602 DBUS_PRIVATE_EXPORT
603 void _dbus_print_backtrace (void);
604 
606  DBusPipe *print_pid_pipe,
607  DBusError *error,
608  dbus_bool_t keep_umask);
609 
610 dbus_bool_t _dbus_verify_daemon_user (const char *user);
611 dbus_bool_t _dbus_change_to_daemon_user (const char *user,
612  DBusError *error);
613 
615  DBusPipe *print_pid_pipe,
616  dbus_pid_t pid_to_write,
617  DBusError *error);
618 
619 dbus_bool_t _dbus_command_for_pid (unsigned long pid,
620  DBusString *str,
621  int max_len,
622  DBusError *error);
623 
624 typedef enum {
625  DBUS_LOG_FLAGS_STDERR = (1 << 0),
626  DBUS_LOG_FLAGS_SYSTEM_LOG = (1 << 1)
627 } DBusLogFlags;
628 
629 DBUS_PRIVATE_EXPORT
630 void _dbus_init_system_log (const char *tag,
631  DBusLogFlags flags);
632 
633 typedef enum {
634  DBUS_SYSTEM_LOG_INFO,
635  DBUS_SYSTEM_LOG_WARNING,
636  DBUS_SYSTEM_LOG_SECURITY,
637  DBUS_SYSTEM_LOG_ERROR
638 } DBusSystemLogSeverity;
639 
640 DBUS_PRIVATE_EXPORT
641 void _dbus_log (DBusSystemLogSeverity severity,
642  const char *msg,
643  ...) _DBUS_GNUC_PRINTF (2, 3);
644 DBUS_PRIVATE_EXPORT
645 void _dbus_logv (DBusSystemLogSeverity severity,
646  const char *msg,
647  va_list args) _DBUS_GNUC_PRINTF (2, 0);
648 
654 #define _DBUS_DOUBLES_BITWISE_EQUAL(a, b) (memcmp (&(a), &(b), sizeof (double)) == 0)
655 
656 dbus_bool_t _dbus_get_autolaunch_address (const char *scope,
657  DBusString *address,
658  DBusError *error);
659 
660 DBUS_PRIVATE_EXPORT
662  DBusString *address,
663  DBusError *error);
664 
668 typedef union DBusGUID DBusGUID;
669 
670 DBUS_PRIVATE_EXPORT
672  dbus_bool_t create_if_not_found,
673  DBusError *error);
674 
681 
686 
691 
692 DBUS_PRIVATE_EXPORT
694  const char *suffix,
695  DBusList **dir_list);
696 
697 unsigned long _dbus_pid_for_log (void);
698 
699 /* FIXME move back to dbus-sysdeps-unix.h probably -
700  * the PID file handling just needs a little more abstraction
701  * in the bus daemon first.
702  */
703 DBUS_PRIVATE_EXPORT
704 dbus_pid_t _dbus_getpid (void);
705 
706 DBUS_PRIVATE_EXPORT
707 dbus_uid_t _dbus_getuid (void);
708 
709 DBUS_PRIVATE_EXPORT
710 void _dbus_flush_caches (void);
711 
713 
714 /* Do not set this too high: it is a denial-of-service risk.
715  * See <https://bugs.freedesktop.org/show_bug.cgi?id=82820>
716  *
717  * (This needs to be in the non-Unix-specific header so that
718  * the config-parser can use it.)
719  */
720 #define DBUS_DEFAULT_MESSAGE_UNIX_FDS 16
721 
722 typedef struct DBusRLimit DBusRLimit;
723 
724 DBusRLimit *_dbus_rlimit_save_fd_limit (DBusError *error);
725 dbus_bool_t _dbus_rlimit_raise_fd_limit (DBusError *error);
726 dbus_bool_t _dbus_rlimit_restore_fd_limit (DBusRLimit *saved,
727  DBusError *error);
728 void _dbus_rlimit_free (DBusRLimit *lim);
729 
730 void _dbus_daemon_report_ready (void);
732 void _dbus_daemon_report_reloaded (void);
733 void _dbus_daemon_report_stopping (void);
734 
735 dbus_bool_t _dbus_inet_sockaddr_to_string (const void *sockaddr_pointer,
736  size_t len,
737  char *string,
738  size_t string_len,
739  const char **family_name,
740  dbus_uint16_t *port,
741  DBusError *error);
742 void _dbus_set_error_with_inet_sockaddr (DBusError *error,
743  const void *sockaddr_pointer,
744  size_t len,
745  const char *description,
746  int saved_errno);
747 void _dbus_combine_tcp_errors (DBusList **sources,
748  const char *summary,
749  const char *host,
750  const char *port,
751  DBusError *dest);
752 
765 #define _DBUS_MAX_SUN_PATH_LENGTH 99
766 
770 
771 
772 #ifdef DBUS_WIN
773 #include "dbus-sysdeps-win.h"
774 #endif
775 
776 #endif /* DBUS_SYSDEPS_H */
An atomic integer safe to increment or decrement from multiple threads.
Definition: dbus-sysdeps.h:339
DBUS_PRIVATE_EXPORT void _dbus_get_real_time(dbus_int64_t *tv_sec, long *tv_usec)
Get current time, as in gettimeofday().
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
volatile dbus_int32_t value
Value of the atomic integer.
Definition: dbus-sysdeps.h:346
dbus_bool_t _dbus_check_dir_is_private_to_user(DBusString *dir, DBusError *error)
Checks to make sure the given directory is private to the user.
dbus_bool_t _dbus_get_is_errno_enomem(int e)
See if errno is ENOMEM.
Definition: dbus-sysdeps.c:680
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_read_local_machine_uuid(DBusGUID *machine_id, dbus_bool_t create_if_not_found, DBusError *error)
Reads the uuid of the machine we're running on from the dbus configuration.
void _dbus_abort(void)
Aborts the program with SIGABRT (dumping core).
Definition: dbus-sysdeps.c:89
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_ensure_directory(const DBusString *filename, DBusError *error)
Creates a directory; succeeds if the directory is created or already existed.
#define DBUS_BEGIN_DECLS
Macro used prior to declaring functions in the D-Bus header files.
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_socketpair(DBusSocket *fd1, DBusSocket *fd2, dbus_bool_t blocking, DBusError *error)
Creates pair of connect sockets (as in socketpair()).
Portable struct with stat() results.
Definition: dbus-sysdeps.h:569
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_PRIVATE_EXPORT void _dbus_log(DBusSystemLogSeverity severity, const char *msg,...)
Log a message to the system log file (e.g.
Definition: dbus-sysdeps.c:736
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_path_is_absolute(const DBusString *filename)
Checks whether the filename is an absolute path.
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_lookup_session_address(dbus_bool_t *supported, DBusString *address, DBusError *error)
Determines the address of the session bus by querying a platform-specific method. ...
unsigned long atime
Access time.
Definition: dbus-sysdeps.h:576
dbus_bool_t _dbus_check_setuid(void)
NOTE: If you modify this function, please also consider making the corresponding change in GLib...
dbus_bool_t _dbus_threads_init_platform_specific(void)
Initialize threads as in dbus_threads_init_default(), appropriately for the platform.
dbus_bool_t _dbus_get_standard_session_servicedirs(DBusList **dirs)
Returns the standard directories for a session bus to look for service activation files...
A globally unique ID ; we have one for each DBusServer, and also one for each machine with libdbus in...
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_close_socket(DBusSocket *fd, DBusError *error)
Closes a socket and invalidates it.
DBUS_PRIVATE_EXPORT dbus_pid_t _dbus_getpid(void)
Gets our process ID.
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_concat_dir_and_file(DBusString *dir, const DBusString *next_component)
Appends the given filename to the given directory.
DBUS_PRIVATE_EXPORT int _dbus_read_socket(DBusSocket fd, DBusString *buffer, int count)
Like _dbus_read(), but only works on sockets so is available on Windows.
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...
short events
Events to poll for.
Definition: dbus-sysdeps.h:439
#define DBUS_PID_UNSET
an invalid PID used to represent an uninitialized dbus_pid_t field
Definition: dbus-sysdeps.h:146
dbus_bool_t _dbus_send_credentials_socket(DBusSocket server_fd, DBusError *error)
Sends a single nul byte with our UNIX credentials as ancillary data.
dbus_bool_t _dbus_get_autolaunch_address(const char *scope, DBusString *address, DBusError *error)
Returns the address of a new session bus.
dbus_bool_t _dbus_clearenv(void)
Wrapper for clearenv().
Definition: dbus-sysdeps.c:213
dbus_bool_t _dbus_credentials_add_from_user(DBusCredentials *credentials, const DBusString *username, DBusCredentialsAddFlags flags, DBusError *error)
Adds the credentials corresponding to the given username.
Internals of directory iterator.
unsigned long mode
File mode.
Definition: dbus-sysdeps.h:571
unsigned long dbus_pid_t
A process ID.
Definition: dbus-sysdeps.h:139
Socket interface.
Definition: dbus-sysdeps.h:185
void _dbus_threads_unlock_platform_specific(void)
Undo _dbus_threads_lock_platform_specific().
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_append_user_from_current_process(DBusString *str)
Append to the string the identity we would like to have when we authenticate, on UNIX this is the cur...
void _dbus_threads_lock_platform_specific(void)
Lock a static mutex used to protect _dbus_threads_init_platform_specific().
dbus_gid_t gid
Group owning file.
Definition: dbus-sysdeps.h:574
DBUS_PRIVATE_EXPORT void _dbus_atomic_set_nonzero(DBusAtomic *atomic)
Atomically set the value of an integer to something nonzero.
dbus_bool_t _dbus_get_is_errno_eagain_or_ewouldblock(int e)
See if errno is EAGAIN or EWOULDBLOCK (this has to be done differently for Winsock so is abstracted) ...
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition: dbus-types.h:37
dbus_bool_t _dbus_get_session_config_file(DBusString *str)
Get the absolute path of the session.conf file.
void _dbus_daemon_report_stopping(void)
Report to a service manager that the daemon calling this function is shutting down.
_DBUS_WARN_UNUSED_RESULT dbus_bool_t _dbus_generate_random_bytes_buffer(char *buffer, int n_bytes, DBusError *error)
Random numbers.
Definition: dbus-sysdeps.c:491
DBUS_PRIVATE_EXPORT dbus_pid_t _dbus_resolve_pid_fd(int pid_fd)
Resolve the PID from the PID FD, if any.
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).
int _dbus_write_socket_two(DBusSocket fd, const DBusString *buffer1, int start1, int len1, const DBusString *buffer2, int start2, int len2)
Like _dbus_write_two() but only works on sockets and is thus available on Windows.
DBusSocket _dbus_accept(DBusSocket listen_fd)
Accepts a connection on a listening socket.
DBUS_PRIVATE_EXPORT dbus_int32_t _dbus_atomic_inc(DBusAtomic *atomic)
Atomically increments an integer.
DBUS_PRIVATE_EXPORT void _dbus_print_backtrace(void)
On GNU libc systems, print a crude backtrace to stderr.
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_append_keyring_directory_for_credentials(DBusString *directory, DBusCredentials *credentials)
Appends the directory in which a keyring for the given credentials should be stored.
dbus_bool_t _dbus_read_credentials_socket(DBusSocket client_fd, DBusCredentials *credentials, DBusError *error)
Reads a single byte which must be nul (an error occurs otherwise), and reads unix credentials if avai...
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_create_directory(const DBusString *filename, DBusError *error)
directory interface
dbus_bool_t _dbus_verify_daemon_user(const char *user)
Verify that after the fork we can successfully change to this user.
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_delete_directory(const DBusString *filename, DBusError *error)
Removes a directory; Directory must be empty.
Object representing an exception.
Definition: dbus-errors.h:50
DBUS_PRIVATE_EXPORT void _dbus_atomic_set_zero(DBusAtomic *atomic)
Atomically set the value of an integer to 0.
_DBUS_GNUC_EXTENSION typedef long dbus_int64_t
A 64-bit signed integer.
void _dbus_disable_sigpipe(void)
signal (SIGPIPE, SIG_IGN);
dbus_bool_t _dbus_stat(const DBusString *filename, DBusStat *statbuf, DBusError *error)
stat() wrapper.
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_PRIVATE_EXPORT const char * _dbus_error_from_system_errno(void)
Converts the current system errno value into a DBusError name.
Definition: dbus-sysdeps.c:657
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_string_get_dirname(const DBusString *filename, DBusString *dirname)
Get the directory name from a complete filename.
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.
int _dbus_read_socket_with_unix_fds(DBusSocket fd, DBusString *buffer, int count, int *fds, unsigned int *n_fds)
Like _dbus_read_socket() but also tries to read unix fds from the socket.
unsigned long ctime
Creation time.
Definition: dbus-sysdeps.h:578
DBUS_PRIVATE_EXPORT void _dbus_flush_caches(void)
Called when the bus daemon is signaled to reload its configuration; any caches should be nuked...
DBUS_PRIVATE_EXPORT const char * _dbus_get_tmpdir(void)
Gets the temporary files directory by inspecting the environment variables TMPDIR, TMP, and TEMP in that order.
dbus_bool_t _dbus_credentials_add_from_current_process(DBusCredentials *credentials)
Adds the most important credentials of the current process (the uid and pid) to the passed-in credent...
unsigned long nlink
Number of hard links.
Definition: dbus-sysdeps.h:572
DBusPollable fd
File descriptor.
Definition: dbus-sysdeps.h:438
dbus_uid_t uid
User owning file.
Definition: dbus-sysdeps.h:573
dbus_bool_t _dbus_unix_groups_from_uid(dbus_uid_t uid, dbus_gid_t **group_ids, int *n_group_ids, DBusError *error)
Gets all groups corresponding to the given UNIX user ID.
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_PRIVATE_EXPORT dbus_bool_t _dbus_generate_random_ascii(DBusString *str, int n_bytes, DBusError *error)
Generates the given number of random bytes, where the bytes are chosen from the alphanumeric ASCII su...
Definition: dbus-sysdeps.c:525
DBUS_PRIVATE_EXPORT void _dbus_exit(int code) _DBUS_GNUC_NORETURN
Exit the process, returning the given value.
unsigned long _dbus_pid_for_log(void)
The only reason this is separate from _dbus_getpid() is to allow it on Windows for logging but not fo...
DBUS_PRIVATE_EXPORT void _dbus_get_monotonic_time(dbus_int64_t *tv_sec, long *tv_usec)
Get current time, as in gettimeofday().
DBusSocket _dbus_connect_unix_socket(const char *path, dbus_bool_t abstract, DBusError *error)
Creates a socket and connects it to the UNIX domain socket at the given path.
void _dbus_directory_close(DBusDirIter *iter)
Closes a directory iteration.
DBUS_PRIVATE_EXPORT const char * _dbus_strerror_from_errno(void)
Get error message from errno.
Definition: dbus-sysdeps.c:724
dbus_bool_t _dbus_get_local_system_servicedirs(DBusList **dirs)
Returns the local admin directories for a system bus to look for service activation files...
DBusSocket _dbus_connect_tcp_socket(const char *host, const char *port, const char *family, DBusError *error)
Creates a socket and connects to a socket at the given host and port.
DBUS_PRIVATE_EXPORT dbus_int32_t _dbus_atomic_dec(DBusAtomic *atomic)
Atomically decrement an integer.
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.
A node in a linked list.
Definition: dbus-list.h:36
DBUS_PRIVATE_EXPORT dbus_uid_t _dbus_getuid(void)
Gets our UID.
DBUS_PRIVATE_EXPORT void _dbus_init_system_log(const char *tag, DBusLogFlags flags)
Initialize the system log.
void _dbus_daemon_report_ready(void)
Report to a service manager that the daemon calling this function is ready for use.
dbus_bool_t _dbus_generate_random_bytes(DBusString *str, int n_bytes, DBusError *error)
Generates the given number of securely random bytes, using the best mechanism we can come up with...
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_set_socket_nonblocking(DBusSocket fd, DBusError *error)
Sets a file descriptor to be nonblocking.
char ** _dbus_get_environment(void)
Gets a NULL-terminated list of key=value pairs from the environment.
DBusSocket _dbus_connect_exec(const char *path, char *const argv[], DBusError *error)
Creates a UNIX domain socket and connects it to the specified process to execute. ...
dbus_bool_t _dbus_get_is_errno_epipe(int e)
See if errno is EPIPE.
Definition: dbus-sysdeps.c:700
void _dbus_daemon_report_reloaded(void)
Report to a service manager that the daemon calling this function is reloading configuration.
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...
DBUS_PRIVATE_EXPORT void _dbus_logv(DBusSystemLogSeverity severity, const char *msg, va_list args)
Log a message to the system log file (e.g.
dbus_bool_t _dbus_get_is_errno_eintr(int e)
See if errno is EINTR.
Definition: dbus-sysdeps.c:690
unsigned long mtime
Modify time.
Definition: dbus-sysdeps.h:577
void _dbus_daemon_report_reloading(void)
Report to a service manager that the daemon calling this function is reloading configuration.
DBUS_PRIVATE_EXPORT int _dbus_write_socket(DBusSocket fd, const DBusString *buffer, int start, int len)
Like _dbus_write(), but only supports sockets and is thus available on Windows.
DBusDirIter * _dbus_directory_open(const DBusString *filename, DBusError *error)
Open a directory to iterate over.
DBUS_PRIVATE_EXPORT dbus_int32_t _dbus_atomic_get(DBusAtomic *atomic)
Atomically get the value of an integer.
DBUS_PRIVATE_EXPORT void _dbus_sleep_milliseconds(int milliseconds)
Sleeps the given number of milliseconds.
DBUS_PRIVATE_EXPORT 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:565
unsigned long dbus_gid_t
A group ID.
Definition: dbus-sysdeps.h:143
unsigned long size
Size of file.
Definition: dbus-sysdeps.h:575
DBUS_PRIVATE_EXPORT int _dbus_printf_string_upper_bound(const char *format, va_list args)
Measure the length of the given format string and arguments, not including the terminating nul...
int dbus_int32_t
A 32-bit signed integer on all platforms.
int _dbus_listen_tcp_socket(const char *host, const char *port, const char *family, DBusString *retport, const char **retfamily, DBusSocket **fds_p, DBusError *error)
Creates a socket and binds it to the given path, then listens on the socket.
dbus_bool_t _dbus_socket_can_pass_unix_fd(DBusSocket fd)
Checks whether file descriptors may be passed via the socket.
const char * _dbus_getenv(const char *varname)
Wrapper for getenv().
Definition: dbus-sysdeps.c:197
unsigned long dbus_uid_t
A user ID.
Definition: dbus-sysdeps.h:141
DBUS_PRIVATE_EXPORT int _dbus_poll(DBusPollFD *fds, int n_fds, int timeout_milliseconds)
Wrapper for poll().
short revents
Events that occurred.
Definition: dbus-sysdeps.h:440
dbus_bool_t _dbus_get_is_errno_etoomanyrefs(int e)
See if errno is ETOOMANYREFS.
Definition: dbus-sysdeps.c:710
void _dbus_set_errno_to_zero(void)
Assign 0 to the global errno variable.
Definition: dbus-sysdeps.c:666
dbus_bool_t _dbus_get_standard_system_servicedirs(DBusList **dirs)
Returns the standard directories for a system bus to look for service activation files.
dbus_bool_t _dbus_directory_get_next_file(DBusDirIter *iter, DBusString *filename, DBusError *error)
Get next file in the directory.
DBusSocket _dbus_listen_unix_socket(const char *path, dbus_bool_t abstract, DBusError *error)
Creates a socket and binds it to the given path, then listens on the socket.
unsigned short dbus_uint16_t
A 16-bit unsigned integer on all platforms.
dbus_bool_t _dbus_daemon_unpublish_session_bus_address(void)
Clear the platform-specific centralized location where the session bus address is published...
#define DBUS_END_DECLS
Macro used after declaring functions in the D-Bus header files.