D-Bus  1.14.10
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 /* Normally we'd only include this in dbus-sysdeps-unix.c.
78  * However, the member names in DBusPollFD are (deliberately) the same as
79  * in POSIX struct pollfd, and AIX's poll() implementation is known to
80  * do things like "#define events reqevents", which would break that approach.
81  * Defend against that by ensuring that if it's renamed anywhere, it's renamed
82  * everywhere.
83  */
84 #ifdef HAVE_POLL
85 #include <poll.h>
86 #endif
87 
88 #ifdef DBUS_WINCE
89 /* Windows CE lacks some system functions (such as errno and clock).
90  We bring them in here. */
91 #include "dbus-sysdeps-wince-glue.h"
92 #endif
93 
94 #ifdef DBUS_WIN
95 #include <ws2tcpip.h>
96 #endif
97 
99 
100 #ifdef DBUS_WIN
101 #define _DBUS_PATH_SEPARATOR ";"
102 #else
103 #define _DBUS_PATH_SEPARATOR ":"
104 #endif
105 
106 /* Forward declarations */
107 
108 
110 typedef struct DBusList DBusList;
111 
113 typedef struct DBusCredentials DBusCredentials;
114 
116 typedef struct DBusPipe DBusPipe;
117 
124 DBUS_PRIVATE_EXPORT
125 void _dbus_abort (void) _DBUS_GNUC_NORETURN;
126 
128 DBUS_PRIVATE_EXPORT
129 const char* _dbus_getenv (const char *varname);
130 DBUS_PRIVATE_EXPORT
132 char ** _dbus_get_environment (void);
133 
135 typedef unsigned long dbus_pid_t;
137 typedef unsigned long dbus_uid_t;
139 typedef unsigned long dbus_gid_t;
140 
142 #define DBUS_PID_UNSET ((dbus_pid_t) -1)
144 #define DBUS_UID_UNSET ((dbus_uid_t) -1)
146 #define DBUS_GID_UNSET ((dbus_gid_t) -1)
147 
149 #define DBUS_PID_FORMAT "%lu"
151 #define DBUS_UID_FORMAT "%lu"
153 #define DBUS_GID_FORMAT "%lu"
154 
158 #ifdef DBUS_WIN
159 
160 typedef struct { SOCKET sock; } DBusSocket;
161 # define DBUS_SOCKET_FORMAT "Iu"
162 # define DBUS_SOCKET_INIT { INVALID_SOCKET }
163 
164 _DBUS_WARN_UNUSED_RESULT
165 static inline SOCKET
166 _dbus_socket_printable (DBusSocket s) { return s.sock; }
167 
168 _DBUS_WARN_UNUSED_RESULT
169 static inline dbus_bool_t
170 _dbus_socket_is_valid (DBusSocket s) { return s.sock != INVALID_SOCKET; }
171 
172 static inline void
173 _dbus_socket_invalidate (DBusSocket *s) { s->sock = INVALID_SOCKET; }
174 
175 _DBUS_WARN_UNUSED_RESULT
176 static inline int
177 _dbus_socket_get_int (DBusSocket s) { return (int)s.sock; }
178 
179 #else /* not DBUS_WIN */
180 
181 typedef struct { int fd; } DBusSocket;
182 # define DBUS_SOCKET_FORMAT "d"
183 # define DBUS_SOCKET_INIT { -1 }
184 
185 _DBUS_WARN_UNUSED_RESULT
186 static inline int
187 _dbus_socket_printable (DBusSocket s) { return s.fd; }
188 
189 _DBUS_WARN_UNUSED_RESULT
190 static inline dbus_bool_t
191 _dbus_socket_is_valid (DBusSocket s) { return s.fd >= 0; }
192 
193 static inline void
194 _dbus_socket_invalidate (DBusSocket *s) { s->fd = -1; }
195 
196 _DBUS_WARN_UNUSED_RESULT
197 static inline int
198 _dbus_socket_get_int (DBusSocket s) { return s.fd; }
199 
200 #endif /* not DBUS_WIN */
201 
202 _DBUS_WARN_UNUSED_RESULT
203 static inline DBusSocket
204 _dbus_socket_get_invalid (void)
205 {
206  DBusSocket s = DBUS_SOCKET_INIT;
207 
208  return s;
209 }
210 
212  DBusError *error);
213 
214 DBUS_PRIVATE_EXPORT
216  DBusError *error);
217 DBUS_PRIVATE_EXPORT
219  DBusString *buffer,
220  int count);
221 DBUS_PRIVATE_EXPORT
223  const DBusString *buffer,
224  int start,
225  int len);
227  const DBusString *buffer1,
228  int start1,
229  int len1,
230  const DBusString *buffer2,
231  int start2,
232  int len2);
233 
235  DBusString *buffer,
236  int count,
237  int *fds,
238  unsigned int *n_fds);
239 DBUS_PRIVATE_EXPORT
240 int _dbus_write_socket_with_unix_fds (DBusSocket fd,
241  const DBusString *buffer,
242  int start,
243  int len,
244  const int *fds,
245  int n_fds);
246 int _dbus_write_socket_with_unix_fds_two (DBusSocket fd,
247  const DBusString *buffer1,
248  int start1,
249  int len1,
250  const DBusString *buffer2,
251  int start2,
252  int len2,
253  const int *fds,
254  int n_fds);
255 
256 DBusSocket _dbus_connect_tcp_socket (const char *host,
257  const char *port,
258  const char *family,
259  DBusError *error);
260 DBusSocket _dbus_connect_tcp_socket_with_nonce (const char *host,
261  const char *port,
262  const char *family,
263  const char *noncefile,
264  DBusError *error);
265 int _dbus_listen_tcp_socket (const char *host,
266  const char *port,
267  const char *family,
268  DBusString *retport,
269  const char **retfamily,
270  DBusSocket **fds_p,
271  DBusError *error);
273 
275  DBusCredentials *credentials,
276  DBusError *error);
278  DBusError *error);
279 
280 typedef enum
281 {
282  DBUS_CREDENTIALS_ADD_FLAGS_USER_DATABASE = (1 << 0),
283  DBUS_CREDENTIALS_ADD_FLAGS_NONE = 0
284 } DBusCredentialsAddFlags;
285 
287  const DBusString *username,
288  DBusCredentialsAddFlags flags,
289  DBusError *error);
290 
292 DBUS_PRIVATE_EXPORT
294 
296  dbus_uid_t *uid_p);
298  dbus_gid_t *gid_p);
300  dbus_gid_t **group_ids,
301  int *n_group_ids,
302  DBusError *error);
304  DBusError *error);
306 dbus_bool_t _dbus_windows_user_is_process_owner (const char *windows_sid);
307 
309  DBusCredentials *credentials);
310 
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 DBUS_PRIVATE_EXPORT
339 void _dbus_atomic_set_zero (DBusAtomic *atomic);
340 DBUS_PRIVATE_EXPORT
341 void _dbus_atomic_set_nonzero (DBusAtomic *atomic);
342 
343 #ifdef DBUS_WIN
344 
345 /* On Windows, you can only poll sockets. We emulate Unix poll() using
346  * select(), so it doesn't matter what precise type we put in DBusPollFD;
347  * use DBusSocket so that the compiler can check we are doing it right.
348  */
349 typedef DBusSocket DBusPollable;
350 # define DBUS_POLLABLE_FORMAT "Iu"
351 
352 static inline DBusPollable
353 _dbus_socket_get_pollable (DBusSocket s) { return s; }
354 
355 static inline SOCKET
356 _dbus_pollable_printable (DBusPollable p) { return p.sock; }
357 
358 static inline dbus_bool_t
359 _dbus_pollable_is_valid (DBusPollable p) { return _dbus_socket_is_valid (p); }
360 
361 static inline void
362 _dbus_pollable_invalidate (DBusPollable *p) { _dbus_socket_invalidate (p); }
363 
364 static inline dbus_bool_t
365 _dbus_pollable_equals (DBusPollable a, DBusPollable b) { return a.sock == b.sock; }
366 
367 #else /* !DBUS_WIN */
368 
369 /* On Unix, you can poll sockets, pipes, etc., and we must put exactly
370  * "int" in DBusPollFD because we're relying on its layout exactly matching
371  * struct pollfd. (This is silly, and one day we should use a better
372  * abstraction.)
373  */
374 typedef int DBusPollable;
375 # define DBUS_POLLABLE_FORMAT "d"
376 
377 static inline DBusPollable
378 _dbus_socket_get_pollable (DBusSocket s) { return s.fd; }
379 
380 static inline int
381 _dbus_pollable_printable (DBusPollable p) { return p; }
382 
383 static inline dbus_bool_t
384 _dbus_pollable_is_valid (DBusPollable p) { return p >= 0; }
385 
386 static inline void
387 _dbus_pollable_invalidate (DBusPollable *p) { *p = -1; }
388 
389 static inline dbus_bool_t
390 _dbus_pollable_equals (DBusPollable a, DBusPollable b) { return a == b; }
391 
392 #endif /* !DBUS_WIN */
393 
394 #if defined(HAVE_POLL) && !defined(BROKEN_POLL)
399 typedef struct pollfd DBusPollFD;
400 
402 #define _DBUS_POLLIN POLLIN
404 #define _DBUS_POLLPRI POLLPRI
406 #define _DBUS_POLLOUT POLLOUT
408 #define _DBUS_POLLERR POLLERR
410 #define _DBUS_POLLHUP POLLHUP
412 #define _DBUS_POLLNVAL POLLNVAL
413 #else
414 /* Emulate poll() via select(). Because we aren't really going to call
415  * poll(), any similarly-shaped struct is acceptable, and any power of 2
416  * will do for the events/revents; these values happen to match Linux
417  * and *BSD. */
418 typedef struct
419 {
420  DBusPollable fd;
421  short events;
422  short revents;
423 } DBusPollFD;
424 
426 #define _DBUS_POLLIN 0x0001
428 #define _DBUS_POLLPRI 0x0002
430 #define _DBUS_POLLOUT 0x0004
432 #define _DBUS_POLLERR 0x0008
434 #define _DBUS_POLLHUP 0x0010
436 #define _DBUS_POLLNVAL 0x0020
437 #endif
438 
439 DBUS_PRIVATE_EXPORT
440 int _dbus_poll (DBusPollFD *fds,
441  int n_fds,
442  int timeout_milliseconds);
443 
444 DBUS_PRIVATE_EXPORT
445 void _dbus_sleep_milliseconds (int milliseconds);
446 
447 DBUS_PRIVATE_EXPORT
448 void _dbus_get_monotonic_time (long *tv_sec,
449  long *tv_usec);
450 
451 DBUS_PRIVATE_EXPORT
452 void _dbus_get_real_time (long *tv_sec,
453  long *tv_usec);
454 
458 DBUS_PRIVATE_EXPORT
460  DBusError *error);
461 DBUS_PRIVATE_EXPORT
463  DBusError *error);
464 DBUS_PRIVATE_EXPORT
466  DBusError *error);
467 
468 DBUS_PRIVATE_EXPORT
470  const DBusString *next_component);
472  DBusString *dirname);
473 DBUS_PRIVATE_EXPORT
475 
479  DBusError *error);
480 
483 
485 typedef struct DBusDirIter DBusDirIter;
486 
488  DBusError *error);
490  DBusString *filename,
491  DBusError *error);
493 
495  DBusError *error);
496 
497 DBUS_PRIVATE_EXPORT
498 const char* _dbus_get_tmpdir (void);
499 
503 _DBUS_WARN_UNUSED_RESULT
505  int n_bytes,
506  DBusError *error);
508  int n_bytes,
509  DBusError *error);
510 DBUS_PRIVATE_EXPORT
512  int n_bytes,
513  DBusError *error);
514 
515 DBUS_PRIVATE_EXPORT
516 const char* _dbus_error_from_errno (int error_number);
517 DBUS_PRIVATE_EXPORT
518 const char* _dbus_error_from_system_errno (void);
519 
520 int _dbus_get_low_level_socket_errno (void);
521 
522 int _dbus_save_socket_errno (void);
523 void _dbus_restore_socket_errno (int saved_errno);
524 void _dbus_set_errno_to_zero (void);
530 DBUS_PRIVATE_EXPORT
531 const char* _dbus_strerror_from_errno (void);
532 
533 void _dbus_disable_sigpipe (void);
534 
535 DBUS_PRIVATE_EXPORT
536 void _dbus_exit (int code) _DBUS_GNUC_NORETURN;
537 
538 DBUS_PRIVATE_EXPORT
539 int _dbus_printf_string_upper_bound (const char *format,
540  va_list args) _DBUS_GNUC_PRINTF (1, 0);
541 
542 #ifdef DBUS_ENABLE_VERBOSE_MODE
543 DBUS_PRIVATE_EXPORT
544 void _dbus_print_thread (void);
545 #endif
546 
550 typedef struct
551 {
552  unsigned long mode;
553  unsigned long nlink;
556  unsigned long size;
557  unsigned long atime;
558  unsigned long mtime;
559  unsigned long ctime;
560 } DBusStat;
561 
562 dbus_bool_t _dbus_stat (const DBusString *filename,
563  DBusStat *statbuf,
564  DBusError *error);
565 DBUS_PRIVATE_EXPORT
567  DBusSocket *fd2,
568  dbus_bool_t blocking,
569  DBusError *error);
570 
571 DBUS_PRIVATE_EXPORT
572 void _dbus_print_backtrace (void);
573 
575  DBusPipe *print_pid_pipe,
576  DBusError *error,
577  dbus_bool_t keep_umask);
578 
579 dbus_bool_t _dbus_verify_daemon_user (const char *user);
580 dbus_bool_t _dbus_change_to_daemon_user (const char *user,
581  DBusError *error);
582 
584  DBusPipe *print_pid_pipe,
585  dbus_pid_t pid_to_write,
586  DBusError *error);
587 
588 dbus_bool_t _dbus_command_for_pid (unsigned long pid,
589  DBusString *str,
590  int max_len,
591  DBusError *error);
592 
593 dbus_bool_t _dbus_user_at_console (const char *username,
594  DBusError *error);
595 
596 typedef enum {
597  DBUS_LOG_FLAGS_STDERR = (1 << 0),
598  DBUS_LOG_FLAGS_SYSTEM_LOG = (1 << 1)
599 } DBusLogFlags;
600 
601 DBUS_PRIVATE_EXPORT
602 void _dbus_init_system_log (const char *tag,
603  DBusLogFlags flags);
604 
605 typedef enum {
606  DBUS_SYSTEM_LOG_INFO,
607  DBUS_SYSTEM_LOG_WARNING,
608  DBUS_SYSTEM_LOG_SECURITY,
609  DBUS_SYSTEM_LOG_ERROR
610 } DBusSystemLogSeverity;
611 
612 DBUS_PRIVATE_EXPORT
613 void _dbus_log (DBusSystemLogSeverity severity,
614  const char *msg,
615  ...) _DBUS_GNUC_PRINTF (2, 3);
616 DBUS_PRIVATE_EXPORT
617 void _dbus_logv (DBusSystemLogSeverity severity,
618  const char *msg,
619  va_list args) _DBUS_GNUC_PRINTF (2, 0);
620 
625 #define _DBUS_BYTE_OF_PRIMITIVE(p, i) \
626  (((const char*)&(p))[(i)])
632 #define _DBUS_DOUBLES_BITWISE_EQUAL(a, b) \
633  (_DBUS_BYTE_OF_PRIMITIVE (a, 0) == _DBUS_BYTE_OF_PRIMITIVE (b, 0) && \
634  _DBUS_BYTE_OF_PRIMITIVE (a, 1) == _DBUS_BYTE_OF_PRIMITIVE (b, 1) && \
635  _DBUS_BYTE_OF_PRIMITIVE (a, 2) == _DBUS_BYTE_OF_PRIMITIVE (b, 2) && \
636  _DBUS_BYTE_OF_PRIMITIVE (a, 3) == _DBUS_BYTE_OF_PRIMITIVE (b, 3) && \
637  _DBUS_BYTE_OF_PRIMITIVE (a, 4) == _DBUS_BYTE_OF_PRIMITIVE (b, 4) && \
638  _DBUS_BYTE_OF_PRIMITIVE (a, 5) == _DBUS_BYTE_OF_PRIMITIVE (b, 5) && \
639  _DBUS_BYTE_OF_PRIMITIVE (a, 6) == _DBUS_BYTE_OF_PRIMITIVE (b, 6) && \
640  _DBUS_BYTE_OF_PRIMITIVE (a, 7) == _DBUS_BYTE_OF_PRIMITIVE (b, 7))
641 
642 dbus_bool_t _dbus_get_autolaunch_address (const char *scope,
643  DBusString *address,
644  DBusError *error);
645 
647  DBusString *address,
648  DBusError *error);
649 
653 typedef union DBusGUID DBusGUID;
654 
655 DBUS_PRIVATE_EXPORT
657  dbus_bool_t create_if_not_found,
658  DBusError *error);
659 
666 
671 
676 
677 DBUS_PRIVATE_EXPORT
679  const char *suffix,
680  DBusList **dir_list);
681 
682 unsigned long _dbus_pid_for_log (void);
683 
684 /* FIXME move back to dbus-sysdeps-unix.h probably -
685  * the PID file handling just needs a little more abstraction
686  * in the bus daemon first.
687  */
688 DBUS_PRIVATE_EXPORT
689 dbus_pid_t _dbus_getpid (void);
690 
691 DBUS_PRIVATE_EXPORT
692 dbus_uid_t _dbus_getuid (void);
693 
694 DBUS_PRIVATE_EXPORT
695 void _dbus_flush_caches (void);
696 
698 
699 /* Do not set this too high: it is a denial-of-service risk.
700  * See <https://bugs.freedesktop.org/show_bug.cgi?id=82820>
701  *
702  * (This needs to be in the non-Unix-specific header so that
703  * the config-parser can use it.)
704  */
705 #define DBUS_DEFAULT_MESSAGE_UNIX_FDS 16
706 
707 typedef struct DBusRLimit DBusRLimit;
708 
709 DBusRLimit *_dbus_rlimit_save_fd_limit (DBusError *error);
710 dbus_bool_t _dbus_rlimit_raise_fd_limit (DBusError *error);
711 dbus_bool_t _dbus_rlimit_restore_fd_limit (DBusRLimit *saved,
712  DBusError *error);
713 void _dbus_rlimit_free (DBusRLimit *lim);
714 
715 void _dbus_daemon_report_ready (void);
717 void _dbus_daemon_report_reloaded (void);
718 void _dbus_daemon_report_stopping (void);
719 
720 dbus_bool_t _dbus_inet_sockaddr_to_string (const void *sockaddr_pointer,
721  size_t len,
722  char *string,
723  size_t string_len,
724  const char **family_name,
725  dbus_uint16_t *port,
726  DBusError *error);
727 void _dbus_set_error_with_inet_sockaddr (DBusError *error,
728  const void *sockaddr_pointer,
729  size_t len,
730  const char *description,
731  int saved_errno);
732 void _dbus_combine_tcp_errors (DBusList **sources,
733  const char *summary,
734  const char *host,
735  const char *port,
736  DBusError *dest);
737 
741 
742 
743 #ifdef DBUS_WIN
744 #include "dbus-sysdeps-win.h"
745 #endif
746 
747 #endif /* DBUS_SYSDEPS_H */
#define DBUS_BEGIN_DECLS
Macro used prior to declaring functions in the D-Bus header files.
#define DBUS_END_DECLS
Macro used after declaring functions in the D-Bus header 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_stat(const DBusString *filename, DBusStat *statbuf, DBusError *error)
stat() wrapper.
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.
dbus_bool_t _dbus_get_standard_session_servicedirs(DBusList **dirs)
Returns the standard directories for a session bus to look for service activation files.
dbus_bool_t _dbus_get_is_errno_epipe(int e)
See if errno is EPIPE.
Definition: dbus-sysdeps.c:734
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_get_is_errno_etoomanyrefs(int e)
See if errno is ETOOMANYREFS.
Definition: dbus-sysdeps.c:744
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).
void _dbus_directory_close(DBusDirIter *iter)
Closes a directory iteration.
unsigned long dbus_uid_t
A user ID.
Definition: dbus-sysdeps.h:137
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_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
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_bool_t _dbus_get_session_config_file(DBusString *str)
Get the absolute path of the session.conf file.
dbus_bool_t _dbus_clearenv(void)
Wrapper for clearenv().
Definition: dbus-sysdeps.c:211
unsigned long dbus_pid_t
A process ID.
Definition: dbus-sysdeps.h:135
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.
void _dbus_daemon_report_reloading(void)
Report to a service manager that the daemon calling this function is reloading configuration.
DBUS_PRIVATE_EXPORT void _dbus_exit(int code) _DBUS_GNUC_NORETURN
Exit the process, returning the given value.
dbus_bool_t _dbus_socket_can_pass_unix_fd(DBusSocket fd)
Checks whether file descriptors may be passed via the socket.
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.
DBUS_PRIVATE_EXPORT void _dbus_atomic_set_nonzero(DBusAtomic *atomic)
Atomically set the value of an integer to something nonzero.
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()).
unsigned long dbus_gid_t
A group ID.
Definition: dbus-sysdeps.h:139
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.
dbus_bool_t _dbus_user_at_console(const char *username, DBusError *error)
Checks if user is at the console.
dbus_bool_t _dbus_command_for_pid(unsigned long pid, DBusString *str, int max_len, DBusError *error)
Get a printable string describing the command used to execute the process with pid.
dbus_bool_t _dbus_get_system_config_file(DBusString *str)
Get the absolute path of the system.conf file (there is no system bus on Windows so this can just ret...
dbus_bool_t _dbus_set_up_transient_session_servicedirs(DBusList **dirs, DBusError *error)
Returns the standard directories for a session bus to look for transient service activation files.
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_parse_unix_user_from_config(const DBusString *username, dbus_uid_t *uid_p)
Parse a UNIX user from the bus config file.
DBUS_PRIVATE_EXPORT dbus_int32_t _dbus_atomic_dec(DBusAtomic *atomic)
Atomically decrement an integer.
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_close_socket(DBusSocket fd, DBusError *error)
Closes a socket.
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...
const char * _dbus_getenv(const char *varname)
Wrapper for getenv().
Definition: dbus-sysdeps.c:195
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_PRIVATE_EXPORT dbus_pid_t _dbus_getpid(void)
Gets our process ID.
DBUS_PRIVATE_EXPORT dbus_int32_t _dbus_atomic_get(DBusAtomic *atomic)
Atomically get the value of an integer.
dbus_bool_t _dbus_set_socket_nonblocking(DBusSocket fd, DBusError *error)
Sets a file descriptor to be nonblocking.
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.
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.
void _dbus_threads_lock_platform_specific(void)
Lock a static mutex used to protect _dbus_threads_init_platform_specific().
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
void _dbus_disable_sigpipe(void)
signal (SIGPIPE, SIG_IGN);
dbus_bool_t _dbus_check_setuid(void)
NOTE: If you modify this function, please also consider making the corresponding change in GLib.
void _dbus_daemon_report_reloaded(void)
Report to a service manager that the daemon calling this function is reloading configuration.
DBUS_PRIVATE_EXPORT void _dbus_sleep_milliseconds(int milliseconds)
Sleeps the given number of milliseconds.
DBUS_PRIVATE_EXPORT const char * _dbus_get_tmpdir(void)
Gets the temporary files directory by inspecting the environment variables TMPDIR,...
void _dbus_daemon_unpublish_session_bus_address(void)
Clear the platform-specific centralized location where the session bus address is published.
dbus_bool_t _dbus_change_to_daemon_user(const char *user, DBusError *error)
Changes the user and group the bus is running as.
dbus_bool_t _dbus_unix_user_is_process_owner(dbus_uid_t uid)
Checks to see if the UNIX user ID matches the UID of the process.
dbus_bool_t _dbus_check_dir_is_private_to_user(DBusString *dir, DBusError *error)
Checks to make sure the given directory is private to the user.
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_bool_t _dbus_windows_user_is_process_owner(const char *windows_sid)
Checks to see if the Windows user SID matches the owner of the process.
dbus_bool_t _dbus_parse_unix_group_from_config(const DBusString *groupname, dbus_gid_t *gid_p)
Parse a UNIX group from the bus config file.
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.
void _dbus_threads_unlock_platform_specific(void)
Undo _dbus_threads_lock_platform_specific().
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_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_PRIVATE_EXPORT dbus_uid_t _dbus_getuid(void)
Gets our UID.
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...
void _dbus_daemon_report_stopping(void)
Report to a service manager that the daemon calling this function is shutting down.
DBUS_PRIVATE_EXPORT void _dbus_atomic_set_zero(DBusAtomic *atomic)
Atomically set the value of an integer to 0.
DBUS_PRIVATE_EXPORT dbus_int32_t _dbus_atomic_inc(DBusAtomic *atomic)
Atomically increments an integer.
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_PRIVATE_EXPORT const char * _dbus_strerror_from_errno(void)
Get error message from errno.
Definition: dbus-sysdeps.c:758
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.
DBUS_PRIVATE_EXPORT void _dbus_get_monotonic_time(long *tv_sec, long *tv_usec)
Get current time, as in gettimeofday().
char ** _dbus_get_environment(void)
Gets a NULL-terminated list of key=value pairs from the environment.
DBusDirIter * _dbus_directory_open(const DBusString *filename, DBusError *error)
Open a directory to iterate over.
DBUS_PRIVATE_EXPORT dbus_bool_t _dbus_delete_directory(const DBusString *filename, DBusError *error)
Removes a directory; Directory must be empty.
DBUS_PRIVATE_EXPORT void _dbus_get_real_time(long *tv_sec, long *tv_usec)
Get current time, as in gettimeofday().
void _dbus_abort(void)
Aborts the program with SIGABRT (dumping core).
Definition: dbus-sysdeps.c:87
dbus_bool_t _dbus_directory_get_next_file(DBusDirIter *iter, DBusString *filename, DBusError *error)
Get next file in the directory.
DBUS_PRIVATE_EXPORT int _dbus_poll(DBusPollFD *fds, int n_fds, int timeout_milliseconds)
Wrapper for poll().
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_bool_t _dbus_get_autolaunch_address(const char *scope, DBusString *address, DBusError *error)
Returns the address of a new session bus.
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.
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_bool_t _dbus_become_daemon(const DBusString *pidfile, DBusPipe *print_pid_pipe, DBusError *error, dbus_bool_t keep_umask)
Does the chdir, fork, setsid, etc.
dbus_bool_t _dbus_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
DBUS_PRIVATE_EXPORT void _dbus_print_backtrace(void)
On GNU libc systems, print a crude backtrace to stderr.
DBUS_PRIVATE_EXPORT void _dbus_init_system_log(const char *tag, DBusLogFlags flags)
Initialize the system log.
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_lookup_session_address(dbus_bool_t *supported, DBusString *address, DBusError *error)
Determines the address of the session bus by querying a platform-specific method.
DBusSocket _dbus_accept(DBusSocket listen_fd)
Accepts a connection on a listening socket.
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...
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_bool_t _dbus_get_is_errno_eintr(int e)
See if errno is EINTR.
Definition: dbus-sysdeps.c:724
dbus_bool_t _dbus_threads_init_platform_specific(void)
Initialize threads as in dbus_threads_init_default(), appropriately for the platform.
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
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.
void _dbus_set_errno_to_zero(void)
Assign 0 to the global errno variable.
Definition: dbus-sysdeps.c:700
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.
dbus_bool_t _dbus_get_is_errno_enomem(int e)
See if errno is ENOMEM.
Definition: dbus-sysdeps.c:714
dbus_bool_t _dbus_string_get_dirname(const DBusString *filename, DBusString *dirname)
Get the directory name from a complete filename.
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_create_directory(const DBusString *filename, DBusError *error)
directory interface
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition: dbus-types.h:35
An atomic integer safe to increment or decrement from multiple threads.
Definition: dbus-sysdeps.h:324
volatile dbus_int32_t value
Value of the atomic integer.
Definition: dbus-sysdeps.h:328
Internals of directory iterator.
Object representing an exception.
Definition: dbus-errors.h:49
A node in a linked list.
Definition: dbus-list.h:35
short events
Events to poll for.
Definition: dbus-sysdeps.h:421
short revents
Events that occurred.
Definition: dbus-sysdeps.h:422
DBusPollable fd
File descriptor.
Definition: dbus-sysdeps.h:420
Socket interface.
Definition: dbus-sysdeps.h:181
Portable struct with stat() results.
Definition: dbus-sysdeps.h:551
unsigned long nlink
Number of hard links.
Definition: dbus-sysdeps.h:553
unsigned long size
Size of file.
Definition: dbus-sysdeps.h:556
dbus_uid_t uid
User owning file.
Definition: dbus-sysdeps.h:554
unsigned long mode
File mode.
Definition: dbus-sysdeps.h:552
dbus_gid_t gid
Group owning file.
Definition: dbus-sysdeps.h:555
unsigned long atime
Access time.
Definition: dbus-sysdeps.h:557
unsigned long ctime
Creation time.
Definition: dbus-sysdeps.h:559
unsigned long mtime
Modify time.
Definition: dbus-sysdeps.h:558
A globally unique ID ; we have one for each DBusServer, and also one for each machine with libdbus in...