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)
4 * Copyright (C) 2002, 2003 Red Hat, Inc.
5 * Copyright (C) 2003 CodeFactory AB
7 * Licensed under the Academic Free License version 2.1
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.
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.
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
25 #ifndef DBUS_SYSDEPS_H
26 #define DBUS_SYSDEPS_H
28 #include <dbus/dbus-errors.h>
29 #include <dbus/dbus-file.h>
30 #include <dbus/dbus-string.h>
31 #include <dbus/dbus-pipe.h>
33 /* this is perhaps bogus, but strcmp() etc. are faster if we use the
34 * stuff straight out of string.h, so have this here for now.
40 /* AIX sys/poll.h does #define events reqevents, and other
41 * wonderousness, so must include sys/poll before declaring
49 /* Windows CE lacks some system functions (such as errno and clock).
50 We bring them in here. */
51 #include "dbus-sysdeps-wince-glue.h"
57 #define _DBUS_PATH_SEPARATOR ";"
59 #define _DBUS_PATH_SEPARATOR ":"
62 /* Forward declarations */
65 /** An opaque list type */
66 typedef struct DBusList DBusList;
68 /** Object that contains a list of credentials such as UNIX or Windows user ID */
69 typedef struct DBusCredentials DBusCredentials;
72 * @addtogroup DBusSysdeps
77 void _dbus_abort (void) _DBUS_GNUC_NORETURN;
79 const char* _dbus_getenv (const char *varname);
80 dbus_bool_t _dbus_setenv (const char *varname,
82 dbus_bool_t _dbus_clearenv (void);
83 char ** _dbus_get_environment (void);
86 typedef unsigned long dbus_pid_t;
88 typedef unsigned long dbus_uid_t;
90 typedef unsigned long dbus_gid_t;
92 /** an invalid PID used to represent an uninitialized dbus_pid_t field */
93 #define DBUS_PID_UNSET ((dbus_pid_t) -1)
94 /** an invalid UID used to represent an uninitialized dbus_uid_t field */
95 #define DBUS_UID_UNSET ((dbus_uid_t) -1)
96 /** an invalid GID used to represent an uninitialized dbus_gid_t field */
97 #define DBUS_GID_UNSET ((dbus_gid_t) -1)
99 /** an appropriate printf format for dbus_pid_t */
100 #define DBUS_PID_FORMAT "%lu"
101 /** an appropriate printf format for dbus_uid_t */
102 #define DBUS_UID_FORMAT "%lu"
103 /** an appropriate printf format for dbus_gid_t */
104 #define DBUS_GID_FORMAT "%lu"
110 * @todo Use for the file descriptors a struct
111 * - struct DBusSocket{ int d; }; -
112 * instead of int to get type-safety which
113 * will be checked by the compiler.
117 dbus_bool_t _dbus_open_tcp_socket (int *fd,
119 dbus_bool_t _dbus_close_socket (int fd,
121 int _dbus_read_socket (int fd,
124 int _dbus_write_socket (int fd,
125 const DBusString *buffer,
128 int _dbus_write_socket_two (int fd,
129 const DBusString *buffer1,
132 const DBusString *buffer2,
136 int _dbus_read_socket_with_unix_fds (int fd,
141 int _dbus_write_socket_with_unix_fds (int fd,
142 const DBusString *buffer,
147 int _dbus_write_socket_with_unix_fds_two (int fd,
148 const DBusString *buffer1,
151 const DBusString *buffer2,
157 dbus_bool_t _dbus_socket_is_invalid (int fd);
159 int _dbus_connect_tcp_socket (const char *host,
163 int _dbus_connect_tcp_socket_with_nonce (const char *host,
166 const char *noncefile,
168 int _dbus_listen_tcp_socket (const char *host,
174 int _dbus_accept (int listen_fd);
177 dbus_bool_t _dbus_read_credentials_socket (int client_fd,
178 DBusCredentials *credentials,
180 dbus_bool_t _dbus_send_credentials_socket (int server_fd,
183 dbus_bool_t _dbus_credentials_add_from_user (DBusCredentials *credentials,
184 const DBusString *username);
185 dbus_bool_t _dbus_credentials_add_from_current_process (DBusCredentials *credentials);
186 dbus_bool_t _dbus_append_user_from_current_process (DBusString *str);
188 dbus_bool_t _dbus_parse_unix_user_from_config (const DBusString *username,
190 dbus_bool_t _dbus_parse_unix_group_from_config (const DBusString *groupname,
192 dbus_bool_t _dbus_unix_groups_from_uid (dbus_uid_t uid,
193 dbus_gid_t **group_ids,
195 dbus_bool_t _dbus_unix_user_is_at_console (dbus_uid_t uid,
197 dbus_bool_t _dbus_unix_user_is_process_owner (dbus_uid_t uid);
198 dbus_bool_t _dbus_windows_user_is_process_owner (const char *windows_sid);
200 dbus_bool_t _dbus_append_keyring_directory_for_credentials (DBusString *directory,
201 DBusCredentials *credentials);
203 void _dbus_daemon_publish_session_bus_address (const char* address);
205 void _dbus_daemon_unpublish_session_bus_address (void);
207 dbus_bool_t _dbus_socket_can_pass_unix_fd(int fd);
209 /** Opaque type representing an atomically-modifiable integer
210 * that can be used from multiple threads.
212 typedef struct DBusAtomic DBusAtomic;
215 * An atomic integer safe to increment or decrement from multiple threads.
220 volatile long value; /**< Value of the atomic integer. */
222 volatile dbus_int32_t value; /**< Value of the atomic integer. */
226 /* The value we get from autofoo is in the form of a cpp expression;
227 * convert that to a conventional defined/undef switch. (We can't get
228 * the conventional defined/undef because of multiarch builds only running
229 * ./configure once, on Darwin.) */
230 #if DBUS_HAVE_ATOMIC_INT_COND
231 # define DBUS_HAVE_ATOMIC_INT 1
233 # undef DBUS_HAVE_ATOMIC_INT
236 dbus_int32_t _dbus_atomic_inc (DBusAtomic *atomic);
237 dbus_int32_t _dbus_atomic_dec (DBusAtomic *atomic);
240 /* AIX uses different values for poll */
243 /** There is data to read */
244 #define _DBUS_POLLIN 0x0001
245 /** There is urgent data to read */
246 #define _DBUS_POLLPRI 0x0004
247 /** Writing now will not block */
248 #define _DBUS_POLLOUT 0x0002
249 /** Error condition */
250 #define _DBUS_POLLERR 0x4000
252 #define _DBUS_POLLHUP 0x2000
253 /** Invalid request: fd not open */
254 #define _DBUS_POLLNVAL 0x8000
255 #elif defined(__HAIKU__)
256 /** There is data to read */
257 #define _DBUS_POLLIN 0x0001
258 /** Writing now will not block */
259 #define _DBUS_POLLOUT 0x0002
260 /** Error condition */
261 #define _DBUS_POLLERR 0x0004
262 /** There is urgent data to read */
263 #define _DBUS_POLLPRI 0x0020
265 #define _DBUS_POLLHUP 0x0080
266 /** Invalid request: fd not open */
267 #define _DBUS_POLLNVAL 0x1000
269 /** There is data to read */
270 #define _DBUS_POLLIN 0x0001
271 /** There is urgent data to read */
272 #define _DBUS_POLLPRI 0x0002
273 /** Writing now will not block */
274 #define _DBUS_POLLOUT 0x0004
275 /** Error condition */
276 #define _DBUS_POLLERR 0x0008
278 #define _DBUS_POLLHUP 0x0010
279 /** Invalid request: fd not open */
280 #define _DBUS_POLLNVAL 0x0020
284 * A portable struct pollfd wrapper.
288 int fd; /**< File descriptor */
289 short events; /**< Events to poll for */
290 short revents; /**< Events that occurred */
293 int _dbus_poll (DBusPollFD *fds,
295 int timeout_milliseconds);
297 void _dbus_sleep_milliseconds (int milliseconds);
299 void _dbus_get_current_time (long *tv_sec,
303 * directory interface
305 dbus_bool_t _dbus_create_directory (const DBusString *filename,
307 dbus_bool_t _dbus_delete_directory (const DBusString *filename,
310 dbus_bool_t _dbus_concat_dir_and_file (DBusString *dir,
311 const DBusString *next_component);
312 dbus_bool_t _dbus_string_get_dirname (const DBusString *filename,
313 DBusString *dirname);
314 dbus_bool_t _dbus_path_is_absolute (const DBusString *filename);
316 dbus_bool_t _dbus_get_standard_session_servicedirs (DBusList **dirs);
317 dbus_bool_t _dbus_get_standard_system_servicedirs (DBusList **dirs);
319 dbus_bool_t _dbus_append_system_config_file (DBusString *str);
320 dbus_bool_t _dbus_append_session_config_file (DBusString *str);
322 /** Opaque type for reading a directory listing */
323 typedef struct DBusDirIter DBusDirIter;
325 DBusDirIter* _dbus_directory_open (const DBusString *filename,
327 dbus_bool_t _dbus_directory_get_next_file (DBusDirIter *iter,
328 DBusString *filename,
330 void _dbus_directory_close (DBusDirIter *iter);
332 dbus_bool_t _dbus_check_dir_is_private_to_user (DBusString *dir,
335 void _dbus_fd_set_close_on_exec (int fd);
337 const char* _dbus_get_tmpdir (void);
342 void _dbus_generate_pseudorandom_bytes_buffer (char *buffer,
344 void _dbus_generate_random_bytes_buffer (char *buffer,
346 dbus_bool_t _dbus_generate_random_bytes (DBusString *str,
348 dbus_bool_t _dbus_generate_random_ascii (DBusString *str,
351 const char* _dbus_error_from_errno (int error_number);
352 const char* _dbus_error_from_system_errno (void);
354 void _dbus_set_errno_to_zero (void);
355 dbus_bool_t _dbus_get_is_errno_nonzero (void);
356 dbus_bool_t _dbus_get_is_errno_eagain_or_ewouldblock (void);
357 dbus_bool_t _dbus_get_is_errno_enomem (void);
358 dbus_bool_t _dbus_get_is_errno_eintr (void);
359 dbus_bool_t _dbus_get_is_errno_epipe (void);
360 const char* _dbus_strerror_from_errno (void);
362 void _dbus_disable_sigpipe (void);
365 void _dbus_exit (int code) _DBUS_GNUC_NORETURN;
367 int _dbus_printf_string_upper_bound (const char *format,
372 * Portable struct with stat() results
376 unsigned long mode; /**< File mode */
377 unsigned long nlink; /**< Number of hard links */
378 dbus_uid_t uid; /**< User owning file */
379 dbus_gid_t gid; /**< Group owning file */
380 unsigned long size; /**< Size of file */
381 unsigned long atime; /**< Access time */
382 unsigned long mtime; /**< Modify time */
383 unsigned long ctime; /**< Creation time */
386 dbus_bool_t _dbus_stat (const DBusString *filename,
389 dbus_bool_t _dbus_full_duplex_pipe (int *fd1,
391 dbus_bool_t blocking,
394 void _dbus_print_backtrace (void);
396 dbus_bool_t _dbus_become_daemon (const DBusString *pidfile,
397 DBusPipe *print_pid_pipe,
399 dbus_bool_t keep_umask);
401 dbus_bool_t _dbus_verify_daemon_user (const char *user);
402 dbus_bool_t _dbus_change_to_daemon_user (const char *user,
405 dbus_bool_t _dbus_write_pid_to_file_and_pipe (const DBusString *pidfile,
406 DBusPipe *print_pid_pipe,
407 dbus_pid_t pid_to_write,
410 dbus_bool_t _dbus_command_for_pid (unsigned long pid,
415 /** A UNIX signal handler */
416 typedef void (* DBusSignalHandler) (int sig);
418 void _dbus_set_signal_handler (int sig,
419 DBusSignalHandler handler);
421 dbus_bool_t _dbus_user_at_console (const char *username,
424 void _dbus_init_system_log (void);
427 DBUS_SYSTEM_LOG_INFO,
428 DBUS_SYSTEM_LOG_SECURITY,
429 DBUS_SYSTEM_LOG_FATAL
430 } DBusSystemLogSeverity;
432 void _dbus_system_log (DBusSystemLogSeverity severity, const char *msg, ...) _DBUS_GNUC_PRINTF (2, 3);
433 void _dbus_system_logv (DBusSystemLogSeverity severity, const char *msg, va_list args);
435 /* Define DBUS_VA_COPY() to do the right thing for copying va_list variables.
436 * config.h may have already defined DBUS_VA_COPY as va_copy or __va_copy.
438 #if !defined (DBUS_VA_COPY)
439 # if defined (__GNUC__) && defined (__PPC__) && (defined (_CALL_SYSV) || defined (_WIN32))
440 # define DBUS_VA_COPY(ap1, ap2) (*(ap1) = *(ap2))
441 # elif defined (DBUS_VA_COPY_AS_ARRAY)
442 # define DBUS_VA_COPY(ap1, ap2) memcpy ((ap1), (ap2), sizeof (va_list))
443 # else /* va_list is a pointer */
444 # define DBUS_VA_COPY(ap1, ap2) ((ap1) = (ap2))
445 # endif /* va_list is a pointer */
446 #endif /* !DBUS_VA_COPY */
450 * Casts a primitive C type to a byte array and then indexes
451 * a particular byte of the array.
453 #define _DBUS_BYTE_OF_PRIMITIVE(p, i) \
454 (((const char*)&(p))[(i)])
455 /** On x86 there is an 80-bit FPU, and if you do "a == b" it may have a
456 * or b in an 80-bit register, thus failing to compare the two 64-bit
457 * doubles for bitwise equality. So this macro compares the two doubles
460 #define _DBUS_DOUBLES_BITWISE_EQUAL(a, b) \
461 (_DBUS_BYTE_OF_PRIMITIVE (a, 0) == _DBUS_BYTE_OF_PRIMITIVE (b, 0) && \
462 _DBUS_BYTE_OF_PRIMITIVE (a, 1) == _DBUS_BYTE_OF_PRIMITIVE (b, 1) && \
463 _DBUS_BYTE_OF_PRIMITIVE (a, 2) == _DBUS_BYTE_OF_PRIMITIVE (b, 2) && \
464 _DBUS_BYTE_OF_PRIMITIVE (a, 3) == _DBUS_BYTE_OF_PRIMITIVE (b, 3) && \
465 _DBUS_BYTE_OF_PRIMITIVE (a, 4) == _DBUS_BYTE_OF_PRIMITIVE (b, 4) && \
466 _DBUS_BYTE_OF_PRIMITIVE (a, 5) == _DBUS_BYTE_OF_PRIMITIVE (b, 5) && \
467 _DBUS_BYTE_OF_PRIMITIVE (a, 6) == _DBUS_BYTE_OF_PRIMITIVE (b, 6) && \
468 _DBUS_BYTE_OF_PRIMITIVE (a, 7) == _DBUS_BYTE_OF_PRIMITIVE (b, 7))
470 dbus_bool_t _dbus_get_autolaunch_address (DBusString *address,
473 dbus_bool_t _dbus_lookup_session_address (dbus_bool_t *supported,
477 /** Type representing a universally unique ID
478 * @todo rename to UUID instead of GUID
480 typedef union DBusGUID DBusGUID;
482 dbus_bool_t _dbus_read_local_machine_uuid (DBusGUID *machine_id,
483 dbus_bool_t create_if_not_found,
487 * Initialize threads as in dbus_threads_init_default(), appropriately
489 * @returns #FALSE if no memory
491 dbus_bool_t _dbus_threads_init_platform_specific (void);
493 dbus_bool_t _dbus_split_paths_and_append (DBusString *dirs,
495 DBusList **dir_list);
497 unsigned long _dbus_pid_for_log (void);
499 /* FIXME move back to dbus-sysdeps-unix.h probably -
500 * the PID file handling just needs a little more abstraction
501 * in the bus daemon first.
503 dbus_pid_t _dbus_getpid (void);
505 dbus_bool_t _dbus_change_to_daemon_user (const char *user,
508 void _dbus_flush_caches (void);
514 #endif /* DBUS_SYSDEPS_H */