D-Bus  1.13.7
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  * 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 #ifndef DBUS_SYSDEPS_H
26 #define DBUS_SYSDEPS_H
27 
28 #ifndef VERSION
29 #warning Please include config.h before dbus-sysdeps.h
30 #include "config.h"
31 #endif
32 
33 #ifdef HAVE_STDINT_H
34 #include <stdint.h>
35 #endif
36 
37 #ifdef HAVE_INTTYPES_H
38 #include <inttypes.h>
39 #endif
40 
41 #include <dbus/dbus-errors.h>
42 #include <dbus/dbus-file.h>
43 #include <dbus/dbus-string.h>
44 
45 /* this is perhaps bogus, but strcmp() etc. are faster if we use the
46  * stuff straight out of string.h, so have this here for now.
47  */
48 #include <string.h>
49 #include <stdarg.h>
50 
51 #if !defined(BROKEN_POLL) && (defined(__APPLE__) || defined(__INTERIX))
52  /* Following libcurl's example, we blacklist poll() on Darwin
53  * (macOS, iOS, etc.) and Interix due to a history of implementation
54  * issues.
55  * https://github.com/curl/curl/blob/master/m4/curl-functions.m4
56  *
57  * On unspecified older macOS versions, poll() failed if given a
58  * device node to poll.
59  *
60  * On macOS < 10.9, poll() with nfds=0 failed instead of waiting for
61  * the timeout and then succeeding.
62  *
63  * On macOS >= 10.12, poll() with nfds=0 succeeded immediately
64  * instead of waiting for the timeout, resulting in busy-looping.
65  *
66  * On Interix, poll() apparently only works for files in /proc.
67  *
68  * The "legacy" build flavour in our CI machinery defines BROKEN_POLL
69  * on whatever platform is in use (normally Linux) to force use of the
70  * same select()-based poll() emulation that we use for macOS, Interix,
71  * and any platform that lacks a real poll(), so that we can test it
72  * more regularly.
73  */
74 # define BROKEN_POLL
75 #endif
76 
77 /* AIX sys/poll.h does #define events reqevents, and other
78  * wonderousness, so must include sys/poll before declaring
79  * DBusPollFD
80  */
81 #ifdef HAVE_POLL
82 #include <sys/poll.h>
83 #endif
84 
85 #ifdef DBUS_WINCE
86 /* Windows CE lacks some system functions (such as errno and clock).
87  We bring them in here. */
88 #include "dbus-sysdeps-wince-glue.h"
89 #endif
90 
91 #ifdef DBUS_WIN
92 #include <ws2tcpip.h>
93 #endif
94 
96 
97 #ifdef DBUS_WIN
98 #define _DBUS_PATH_SEPARATOR ";"
99 #else
100 #define _DBUS_PATH_SEPARATOR ":"
101 #endif
102 
103 /* Forward declarations */
104 
105 
107 typedef struct DBusList DBusList;
108 
110 typedef struct DBusCredentials DBusCredentials;
111 
113 typedef struct DBusPipe DBusPipe;
114 
121 DBUS_PRIVATE_EXPORT
122 void _dbus_abort (void) _DBUS_GNUC_NORETURN;
123 
125 DBUS_PRIVATE_EXPORT
126 const char* _dbus_getenv (const char *varname);
127 DBUS_PRIVATE_EXPORT
129 char ** _dbus_get_environment (void);
130 
132 typedef unsigned long dbus_pid_t;
134 typedef unsigned long dbus_uid_t;
136 typedef unsigned long dbus_gid_t;
137 
139 #define DBUS_PID_UNSET ((dbus_pid_t) -1)
140 
141 #define DBUS_UID_UNSET ((dbus_uid_t) -1)
142 
143 #define DBUS_GID_UNSET ((dbus_gid_t) -1)
144 
146 #define DBUS_PID_FORMAT "%lu"
147 
148 #define DBUS_UID_FORMAT "%lu"
149 
150 #define DBUS_GID_FORMAT "%lu"
151 
155 #ifdef DBUS_WIN
156 
157 typedef struct { SOCKET sock; } DBusSocket;
158 # define DBUS_SOCKET_FORMAT "Iu"
159 # define DBUS_SOCKET_INIT { INVALID_SOCKET }
160 
161 _DBUS_WARN_UNUSED_RESULT
162 static inline SOCKET
163 _dbus_socket_printable (DBusSocket s) { return s.sock; }
164 
165 _DBUS_WARN_UNUSED_RESULT
166 static inline dbus_bool_t
167 _dbus_socket_is_valid (DBusSocket s) { return s.sock != INVALID_SOCKET; }
168 
169 static inline void
170 _dbus_socket_invalidate (DBusSocket *s) { s->sock = INVALID_SOCKET; }
171 
172 _DBUS_WARN_UNUSED_RESULT
173 static inline int
174 _dbus_socket_get_int (DBusSocket s) { return (int)s.sock; }
175 
176 #else /* not DBUS_WIN */
177 
178 typedef struct { int fd; } DBusSocket;
179 # define DBUS_SOCKET_FORMAT "d"
180 # define DBUS_SOCKET_INIT { -1 }
181 
182 _DBUS_WARN_UNUSED_RESULT
183 static inline int
184 _dbus_socket_printable (DBusSocket s) { return s.fd; }
185 
186 _DBUS_WARN_UNUSED_RESULT
187 static inline dbus_bool_t
188 _dbus_socket_is_valid (DBusSocket s) { return s.fd >= 0; }
189 
190 static inline void
191 _dbus_socket_invalidate (DBusSocket *s) { s->fd = -1; }
192 
193 _DBUS_WARN_UNUSED_RESULT
194 static inline int
195 _dbus_socket_get_int (DBusSocket s) { return s.fd; }
196 
197 #endif /* not DBUS_WIN */
198 
199 _DBUS_WARN_UNUSED_RESULT
200 static inline DBusSocket
201 _dbus_socket_get_invalid (void)
202 {
203  DBusSocket s = DBUS_SOCKET_INIT;
204 
205  return s;
206 }
207 
209  DBusError *error);
210 
211 DBUS_PRIVATE_EXPORT
213  DBusError *error);
214 DBUS_PRIVATE_EXPORT
216  DBusString *buffer,
217  int count);
218 DBUS_PRIVATE_EXPORT
220  const DBusString *buffer,
221  int start,
222  int len);
224  const DBusString *buffer1,
225  int start1,
226  int len1,
227  const DBusString *buffer2,
228  int start2,
229  int len2);
230 
232  DBusString *buffer,
233  int count,
234  int *fds,
235  unsigned int *n_fds);
236 DBUS_PRIVATE_EXPORT
237 int _dbus_write_socket_with_unix_fds (DBusSocket fd,
238  const DBusString *buffer,
239  int start,
240  int len,
241  const int *fds,
242  int n_fds);
243 int _dbus_write_socket_with_unix_fds_two (DBusSocket fd,
244  const DBusString *buffer1,
245  int start1,
246  int len1,
247  const DBusString *buffer2,
248  int start2,
249  int len2,
250  const int *fds,
251  int n_fds);
252 
253 DBusSocket _dbus_connect_tcp_socket (const char *host,
254  const char *port,
255  const char *family,
256  DBusError *error);
257 DBusSocket _dbus_connect_tcp_socket_with_nonce (const char *host,
258  const char *port,
259  const char *family,
260  const char *noncefile,
261  DBusError *error);
262 int _dbus_listen_tcp_socket (const char *host,
263  const char *port,
264  const char *family,
265  DBusString *retport,
266  const char **retfamily,
267  DBusSocket **fds_p,
268  DBusError *error);
270 
272  DBusCredentials *credentials,
273  DBusError *error);
275  DBusError *error);
276 
277 typedef enum
278 {
279  DBUS_CREDENTIALS_ADD_FLAGS_USER_DATABASE = (1 << 0),
280  DBUS_CREDENTIALS_ADD_FLAGS_NONE = 0
281 } DBusCredentialsAddFlags;
282 
284  const DBusString *username,
285  DBusCredentialsAddFlags flags,
286  DBusError *error);
287 
289 DBUS_PRIVATE_EXPORT
291 
293  dbus_uid_t *uid_p);
295  dbus_gid_t *gid_p);
297  dbus_gid_t **group_ids,
298  int *n_group_ids);
300  DBusError *error);
302 dbus_bool_t _dbus_windows_user_is_process_owner (const char *windows_sid);
303 
305  DBusCredentials *credentials);
306 
307 dbus_bool_t _dbus_daemon_is_session_bus_address_published (const char *scope);
308 
309 dbus_bool_t _dbus_daemon_publish_session_bus_address (const char* address, const char* shm_name);
310 
311 void _dbus_daemon_unpublish_session_bus_address (void);
312 
314 
318 typedef struct DBusAtomic DBusAtomic;
319 
324 {
325 #ifdef DBUS_WIN
326  volatile long value;
327 #else
328  volatile dbus_int32_t value;
329 #endif
330 };
331 
332 DBUS_PRIVATE_EXPORT
333 dbus_int32_t _dbus_atomic_inc (DBusAtomic *atomic);
334 DBUS_PRIVATE_EXPORT
335 dbus_int32_t _dbus_atomic_dec (DBusAtomic *atomic);
336 DBUS_PRIVATE_EXPORT
337 dbus_int32_t _dbus_atomic_get (DBusAtomic *atomic);
338 
339 #ifdef DBUS_WIN
340 
341 /* On Windows, you can only poll sockets. We emulate Unix poll() using
342  * select(), so it doesn't matter what precise type we put in DBusPollFD;
343  * use DBusSocket so that the compiler can check we are doing it right.
344  */
345 typedef DBusSocket DBusPollable;
346 # define DBUS_POLLABLE_FORMAT "Iu"
347 
348 static inline DBusPollable
349 _dbus_socket_get_pollable (DBusSocket s) { return s; }
350 
351 static inline SOCKET
352 _dbus_pollable_printable (DBusPollable p) { return p.sock; }
353 
354 static inline dbus_bool_t
355 _dbus_pollable_is_valid (DBusPollable p) { return _dbus_socket_is_valid (p); }
356 
357 static inline void
358 _dbus_pollable_invalidate (DBusPollable *p) { _dbus_socket_invalidate (p); }
359 
360 static inline dbus_bool_t
361 _dbus_pollable_equals (DBusPollable a, DBusPollable b) { return a.sock == b.sock; }
362 
363 #else /* !DBUS_WIN */
364 
365 /* On Unix, you can poll sockets, pipes, etc., and we must put exactly
366  * "int" in DBusPollFD because we're relying on its layout exactly matching
367  * struct pollfd. (This is silly, and one day we should use a better
368  * abstraction.)
369  */
370 typedef int DBusPollable;
371 # define DBUS_POLLABLE_FORMAT "d"
372 
373 static inline DBusPollable
374 _dbus_socket_get_pollable (DBusSocket s) { return s.fd; }
375 
376 static inline int
377 _dbus_pollable_printable (DBusPollable p) { return p; }
378 
379 static inline dbus_bool_t
380 _dbus_pollable_is_valid (DBusPollable p) { return p >= 0; }
381 
382 static inline void
383 _dbus_pollable_invalidate (DBusPollable *p) { *p = -1; }
384 
385 static inline dbus_bool_t
386 _dbus_pollable_equals (DBusPollable a, DBusPollable b) { return a == b; }
387 
388 #endif /* !DBUS_WIN */
389 
390 #if defined(HAVE_POLL) && !defined(BROKEN_POLL)
391 
395 typedef struct pollfd DBusPollFD;
396 
398 #define _DBUS_POLLIN POLLIN
399 
400 #define _DBUS_POLLPRI POLLPRI
401 
402 #define _DBUS_POLLOUT POLLOUT
403 
404 #define _DBUS_POLLERR POLLERR
405 
406 #define _DBUS_POLLHUP POLLHUP
407 
408 #define _DBUS_POLLNVAL POLLNVAL
409 #else
410 /* Emulate poll() via select(). Because we aren't really going to call
411  * poll(), any similarly-shaped struct is acceptable, and any power of 2
412  * will do for the events/revents; these values happen to match Linux
413  * and *BSD. */
414 typedef struct
415 {
416  DBusPollable fd;
417  short events;
418  short revents;
419 } DBusPollFD;
420 
422 #define _DBUS_POLLIN 0x0001
423 
424 #define _DBUS_POLLPRI 0x0002
425 
426 #define _DBUS_POLLOUT 0x0004
427 
428 #define _DBUS_POLLERR 0x0008
429 
430 #define _DBUS_POLLHUP 0x0010
431 
432 #define _DBUS_POLLNVAL 0x0020
433 #endif
434 
435 DBUS_PRIVATE_EXPORT
436 int _dbus_poll (DBusPollFD *fds,
437  int n_fds,
438  int timeout_milliseconds);
439 
440 DBUS_PRIVATE_EXPORT
441 void _dbus_sleep_milliseconds (int milliseconds);
442 
443 DBUS_PRIVATE_EXPORT
444 void _dbus_get_monotonic_time (long *tv_sec,
445  long *tv_usec);
446 
447 DBUS_PRIVATE_EXPORT
448 void _dbus_get_real_time (long *tv_sec,
449  long *tv_usec);
450 
454 DBUS_PRIVATE_EXPORT
456  DBusError *error);
457 DBUS_PRIVATE_EXPORT
459  DBusError *error);
460 DBUS_PRIVATE_EXPORT
462  DBusError *error);
463 
464 DBUS_PRIVATE_EXPORT
466  const DBusString *next_component);
468  DBusString *dirname);
469 DBUS_PRIVATE_EXPORT
471 
475  DBusError *error);
476 
479 
481 typedef struct DBusDirIter DBusDirIter;
482 
484  DBusError *error);
486  DBusString *filename,
487  DBusError *error);
489 
491  DBusError *error);
492 
493 DBUS_PRIVATE_EXPORT
494 const char* _dbus_get_tmpdir (void);
495 
499 _DBUS_WARN_UNUSED_RESULT
501  int n_bytes,
502  DBusError *error);
504  int n_bytes,
505  DBusError *error);
506 DBUS_PRIVATE_EXPORT
508  int n_bytes,
509  DBusError *error);
510 
511 DBUS_PRIVATE_EXPORT
512 const char* _dbus_error_from_errno (int error_number);
513 DBUS_PRIVATE_EXPORT
514 const char* _dbus_error_from_system_errno (void);
515 
516 int _dbus_get_low_level_socket_errno (void);
517 
518 int _dbus_save_socket_errno (void);
519 void _dbus_restore_socket_errno (int saved_errno);
520 void _dbus_set_errno_to_zero (void);
526 DBUS_PRIVATE_EXPORT
527 const char* _dbus_strerror_from_errno (void);
528 
529 void _dbus_disable_sigpipe (void);
530 
531 DBUS_PRIVATE_EXPORT
532 void _dbus_exit (int code) _DBUS_GNUC_NORETURN;
533 
534 DBUS_PRIVATE_EXPORT
535 int _dbus_printf_string_upper_bound (const char *format,
536  va_list args) _DBUS_GNUC_PRINTF (1, 0);
537 
538 #ifdef DBUS_ENABLE_VERBOSE_MODE
539 DBUS_PRIVATE_EXPORT
540 void _dbus_print_thread (void);
541 #endif
542 
546 typedef struct
547 {
548  unsigned long mode;
549  unsigned long nlink;
552  unsigned long size;
553  unsigned long atime;
554  unsigned long mtime;
555  unsigned long ctime;
556 } DBusStat;
557 
558 dbus_bool_t _dbus_stat (const DBusString *filename,
559  DBusStat *statbuf,
560  DBusError *error);
561 DBUS_PRIVATE_EXPORT
563  DBusSocket *fd2,
564  dbus_bool_t blocking,
565  DBusError *error);
566 
567 DBUS_PRIVATE_EXPORT
568 void _dbus_print_backtrace (void);
569 
571  DBusPipe *print_pid_pipe,
572  DBusError *error,
573  dbus_bool_t keep_umask);
574 
575 dbus_bool_t _dbus_verify_daemon_user (const char *user);
576 dbus_bool_t _dbus_change_to_daemon_user (const char *user,
577  DBusError *error);
578 
580  DBusPipe *print_pid_pipe,
581  dbus_pid_t pid_to_write,
582  DBusError *error);
583 
584 dbus_bool_t _dbus_command_for_pid (unsigned long pid,
585  DBusString *str,
586  int max_len,
587  DBusError *error);
588 
589 dbus_bool_t _dbus_user_at_console (const char *username,
590  DBusError *error);
591 
592 typedef enum {
593  DBUS_LOG_FLAGS_STDERR = (1 << 0),
594  DBUS_LOG_FLAGS_SYSTEM_LOG = (1 << 1)
595 } DBusLogFlags;
596 
597 DBUS_PRIVATE_EXPORT
598 void _dbus_init_system_log (const char *tag,
599  DBusLogFlags flags);
600 
601 typedef enum {
602  DBUS_SYSTEM_LOG_INFO,
603  DBUS_SYSTEM_LOG_WARNING,
604  DBUS_SYSTEM_LOG_SECURITY,
605  DBUS_SYSTEM_LOG_ERROR
606 } DBusSystemLogSeverity;
607 
608 DBUS_PRIVATE_EXPORT
609 void _dbus_log (DBusSystemLogSeverity severity,
610  const char *msg,
611  ...) _DBUS_GNUC_PRINTF (2, 3);
612 DBUS_PRIVATE_EXPORT
613 void _dbus_logv (DBusSystemLogSeverity severity,
614  const char *msg,
615  va_list args) _DBUS_GNUC_PRINTF (2, 0);
616 
621 #define _DBUS_BYTE_OF_PRIMITIVE(p, i) \
622  (((const char*)&(p))[(i)])
623 
628 #define _DBUS_DOUBLES_BITWISE_EQUAL(a, b) \
629  (_DBUS_BYTE_OF_PRIMITIVE (a, 0) == _DBUS_BYTE_OF_PRIMITIVE (b, 0) && \
630  _DBUS_BYTE_OF_PRIMITIVE (a, 1) == _DBUS_BYTE_OF_PRIMITIVE (b, 1) && \
631  _DBUS_BYTE_OF_PRIMITIVE (a, 2) == _DBUS_BYTE_OF_PRIMITIVE (b, 2) && \
632  _DBUS_BYTE_OF_PRIMITIVE (a, 3) == _DBUS_BYTE_OF_PRIMITIVE (b, 3) && \
633  _DBUS_BYTE_OF_PRIMITIVE (a, 4) == _DBUS_BYTE_OF_PRIMITIVE (b, 4) && \
634  _DBUS_BYTE_OF_PRIMITIVE (a, 5) == _DBUS_BYTE_OF_PRIMITIVE (b, 5) && \
635  _DBUS_BYTE_OF_PRIMITIVE (a, 6) == _DBUS_BYTE_OF_PRIMITIVE (b, 6) && \
636  _DBUS_BYTE_OF_PRIMITIVE (a, 7) == _DBUS_BYTE_OF_PRIMITIVE (b, 7))
637 
638 dbus_bool_t _dbus_get_autolaunch_address (const char *scope,
639  DBusString *address,
640  DBusError *error);
641 
643  DBusString *address,
644  DBusError *error);
645 
649 typedef union DBusGUID DBusGUID;
650 
651 DBUS_PRIVATE_EXPORT
653  dbus_bool_t create_if_not_found,
654  DBusError *error);
655 
662 
667 
672 
673 DBUS_PRIVATE_EXPORT
675  const char *suffix,
676  DBusList **dir_list);
677 
678 unsigned long _dbus_pid_for_log (void);
679 
680 /* FIXME move back to dbus-sysdeps-unix.h probably -
681  * the PID file handling just needs a little more abstraction
682  * in the bus daemon first.
683  */
684 DBUS_PRIVATE_EXPORT
685 dbus_pid_t _dbus_getpid (void);
686 
687 DBUS_PRIVATE_EXPORT
688 dbus_uid_t _dbus_getuid (void);
689 
690 DBUS_PRIVATE_EXPORT
691 void _dbus_flush_caches (void);
692 
694 
695 /* Do not set this too high: it is a denial-of-service risk.
696  * See <https://bugs.freedesktop.org/show_bug.cgi?id=82820>
697  *
698  * (This needs to be in the non-Unix-specific header so that
699  * the config-parser can use it.)
700  */
701 #define DBUS_DEFAULT_MESSAGE_UNIX_FDS 16
702 
703 typedef struct DBusRLimit DBusRLimit;
704 
705 DBusRLimit *_dbus_rlimit_save_fd_limit (DBusError *error);
706 dbus_bool_t _dbus_rlimit_raise_fd_limit_if_privileged (unsigned int desired,
707  DBusError *error);
708 dbus_bool_t _dbus_rlimit_restore_fd_limit (DBusRLimit *saved,
709  DBusError *error);
710 void _dbus_rlimit_free (DBusRLimit *lim);
711 
712 void _dbus_daemon_report_ready (void);
714 void _dbus_daemon_report_reloaded (void);
715 void _dbus_daemon_report_stopping (void);
716 
717 dbus_bool_t _dbus_inet_sockaddr_to_string (const void *sockaddr_pointer,
718  size_t len,
719  char *string,
720  size_t string_len,
721  const char **family_name,
722  dbus_uint16_t *port,
723  DBusError *error);
724 void _dbus_set_error_with_inet_sockaddr (DBusError *error,
725  const void *sockaddr_pointer,
726  size_t len,
727  const char *description,
728  int saved_errno);
729 void _dbus_combine_tcp_errors (DBusList **sources,
730  const char *summary,
731  const char *host,
732  const char *port,
733  DBusError *dest);
734 
735 void _dbus_disable_crash_handling (void);
736 
740 
741 
742 #ifdef DBUS_WIN
743 #include "dbus-sysdeps-win.h"
744 #endif
745 
746 #endif /* DBUS_SYSDEPS_H */
An atomic integer safe to increment or decrement from multiple threads.
Definition: dbus-sysdeps.h:323
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:236
volatile dbus_int32_t value
Value of the atomic integer.
Definition: dbus-sysdeps.h:328
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:714
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&#39;re running on from the dbus configuration.
void _dbus_abort(void)
Aborts the program with SIGABRT (dumping core).
Definition: dbus-sysdeps.c:87
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:546
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:770
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_path_is_absolute(const DBusString *filename)
Checks whether the filename is an absolute path.
unsigned long atime
Access time.
Definition: dbus-sysdeps.h:553
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_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:417
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_PRIVATE_EXPORT dbus_bool_t _dbus_close_socket(DBusSocket fd, DBusError *error)
Closes a socket.
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:211
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.
dbus_bool_t _dbus_user_at_console(const char *username, DBusError *error)
Checks if user is at the console.
unsigned long mode
File mode.
Definition: dbus-sysdeps.h:548
unsigned long dbus_pid_t
A process ID.
Definition: dbus-sysdeps.h:132
Socket interface.
Definition: dbus-sysdeps.h:178
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:551
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:35
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:525
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:48
DBUS_PRIVATE_EXPORT void _dbus_get_monotonic_time(long *tv_sec, long *tv_usec)
Get current time, as in gettimeofday().
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:691
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:555
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:549
DBusPollable fd
File descriptor.
Definition: dbus-sysdeps.h:416
dbus_uid_t uid
User owning file.
Definition: dbus-sysdeps.h:550
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:559
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...
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:758
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:34
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.
dbus_bool_t _dbus_get_is_errno_epipe(int e)
See if errno is EPIPE.
Definition: dbus-sysdeps.c:734
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_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. ...
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_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_get_is_errno_eintr(int e)
See if errno is EINTR.
Definition: dbus-sysdeps.c:724
unsigned long mtime
Modify time.
Definition: dbus-sysdeps.h:554
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:599
unsigned long dbus_gid_t
A group ID.
Definition: dbus-sysdeps.h:136
unsigned long size
Size of file.
Definition: dbus-sysdeps.h:552
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_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:195
unsigned long dbus_uid_t
A user ID.
Definition: dbus-sysdeps.h:134
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:418
dbus_bool_t _dbus_get_is_errno_etoomanyrefs(int e)
See if errno is ETOOMANYREFS.
Definition: dbus-sysdeps.c:744
void _dbus_set_errno_to_zero(void)
Assign 0 to the global errno variable.
Definition: dbus-sysdeps.c:700
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.
DBUS_PRIVATE_EXPORT void _dbus_get_real_time(long *tv_sec, long *tv_usec)
Get current time, as in gettimeofday().
void _dbus_disable_crash_handling(void)
Try to disable core dumps and similar special crash handling.
#define DBUS_END_DECLS
Macro used after declaring functions in the D-Bus header files.