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
30 #include <dbus/dbus-errors.h>
31 #include <dbus/dbus-string.h>
32 #include <dbus/dbus-pipe.h>
34 /* this is perhaps bogus, but strcmp() etc. are faster if we use the
35 * stuff straight out of string.h, so have this here for now.
41 /* AIX sys/poll.h does #define events reqevents, and other
42 * wonderousness, so must include sys/poll before declaring
52 #define _DBUS_PATH_SEPARATOR ";"
54 #define _DBUS_PATH_SEPARATOR ":"
57 /* Forward declarations */
60 /** An opaque list type */
61 typedef struct DBusList DBusList;
63 /** Object that contains a list of credentials such as UNIX or Windows user ID */
64 typedef struct DBusCredentials DBusCredentials;
67 * @addtogroup DBusSysdeps
72 void _dbus_abort (void) _DBUS_GNUC_NORETURN;
74 const char* _dbus_getenv (const char *varname);
75 dbus_bool_t _dbus_setenv (const char *varname,
77 dbus_bool_t _dbus_clearenv (void);
78 char ** _dbus_get_environment (void);
81 typedef unsigned long dbus_pid_t;
83 typedef unsigned long dbus_uid_t;
85 typedef unsigned long dbus_gid_t;
87 /** an invalid PID used to represent an uninitialized dbus_pid_t field */
88 #define DBUS_PID_UNSET ((dbus_pid_t) -1)
89 /** an invalid UID used to represent an uninitialized dbus_uid_t field */
90 #define DBUS_UID_UNSET ((dbus_uid_t) -1)
91 /** an invalid GID used to represent an uninitialized dbus_gid_t field */
92 #define DBUS_GID_UNSET ((dbus_gid_t) -1)
94 /** an appropriate printf format for dbus_pid_t */
95 #define DBUS_PID_FORMAT "%lu"
96 /** an appropriate printf format for dbus_uid_t */
97 #define DBUS_UID_FORMAT "%lu"
98 /** an appropriate printf format for dbus_gid_t */
99 #define DBUS_GID_FORMAT "%lu"
105 * @todo Use for the file descriptors a struct
106 * - struct DBusSocket{ int d; }; -
107 * instead of int to get type-safety which
108 * will be checked by the compiler.
112 dbus_bool_t _dbus_open_tcp_socket (int *fd,
114 dbus_bool_t _dbus_close_socket (int fd,
116 int _dbus_read_socket (int fd,
119 int _dbus_write_socket (int fd,
120 const DBusString *buffer,
123 int _dbus_write_socket_two (int fd,
124 const DBusString *buffer1,
127 const DBusString *buffer2,
131 int _dbus_read_socket_with_unix_fds (int fd,
136 int _dbus_write_socket_with_unix_fds (int fd,
137 const DBusString *buffer,
142 int _dbus_write_socket_with_unix_fds_two (int fd,
143 const DBusString *buffer1,
146 const DBusString *buffer2,
152 dbus_bool_t _dbus_socket_is_invalid (int fd);
154 int _dbus_connect_tcp_socket (const char *host,
158 int _dbus_connect_tcp_socket_with_nonce (const char *host,
161 const char *noncefile,
163 int _dbus_listen_tcp_socket (const char *host,
169 int _dbus_accept (int listen_fd);
172 dbus_bool_t _dbus_read_credentials_socket (int client_fd,
173 DBusCredentials *credentials,
175 dbus_bool_t _dbus_send_credentials_socket (int server_fd,
178 dbus_bool_t _dbus_credentials_add_from_user (DBusCredentials *credentials,
179 const DBusString *username);
180 dbus_bool_t _dbus_credentials_add_from_current_process (DBusCredentials *credentials);
181 dbus_bool_t _dbus_append_user_from_current_process (DBusString *str);
183 dbus_bool_t _dbus_parse_unix_user_from_config (const DBusString *username,
185 dbus_bool_t _dbus_parse_unix_group_from_config (const DBusString *groupname,
187 dbus_bool_t _dbus_unix_groups_from_uid (dbus_uid_t uid,
188 dbus_gid_t **group_ids,
190 dbus_bool_t _dbus_unix_user_is_at_console (dbus_uid_t uid,
192 dbus_bool_t _dbus_unix_user_is_process_owner (dbus_uid_t uid);
193 dbus_bool_t _dbus_windows_user_is_process_owner (const char *windows_sid);
195 dbus_bool_t _dbus_append_keyring_directory_for_credentials (DBusString *directory,
196 DBusCredentials *credentials);
198 void _dbus_daemon_publish_session_bus_address (const char* address);
200 void _dbus_daemon_unpublish_session_bus_address (void);
202 dbus_bool_t _dbus_socket_can_pass_unix_fd(int fd);
204 /** Opaque type representing an atomically-modifiable integer
205 * that can be used from multiple threads.
207 typedef struct DBusAtomic DBusAtomic;
210 * An atomic integer safe to increment or decrement from multiple threads.
215 volatile long value; /**< Value of the atomic integer. */
217 volatile dbus_int32_t value; /**< Value of the atomic integer. */
221 /* The value we get from autofoo is in the form of a cpp expression;
222 * convert that to a conventional defined/undef switch. (We can't get
223 * the conventional defined/undef because of multiarch builds only running
224 * ./configure once, on Darwin.) */
225 #if DBUS_HAVE_ATOMIC_INT_COND
226 # define DBUS_HAVE_ATOMIC_INT 1
228 # undef DBUS_HAVE_ATOMIC_INT
231 dbus_int32_t _dbus_atomic_inc (DBusAtomic *atomic);
232 dbus_int32_t _dbus_atomic_dec (DBusAtomic *atomic);
235 /* AIX uses different values for poll */
238 /** There is data to read */
239 #define _DBUS_POLLIN 0x0001
240 /** There is urgent data to read */
241 #define _DBUS_POLLPRI 0x0004
242 /** Writing now will not block */
243 #define _DBUS_POLLOUT 0x0002
244 /** Error condition */
245 #define _DBUS_POLLERR 0x4000
247 #define _DBUS_POLLHUP 0x2000
248 /** Invalid request: fd not open */
249 #define _DBUS_POLLNVAL 0x8000
250 #elif defined(__HAIKU__)
251 /** There is data to read */
252 #define _DBUS_POLLIN 0x0001
253 /** Writing now will not block */
254 #define _DBUS_POLLOUT 0x0002
255 /** Error condition */
256 #define _DBUS_POLLERR 0x0004
257 /** There is urgent data to read */
258 #define _DBUS_POLLPRI 0x0020
260 #define _DBUS_POLLHUP 0x0080
261 /** Invalid request: fd not open */
262 #define _DBUS_POLLNVAL 0x1000
264 /** There is data to read */
265 #define _DBUS_POLLIN 0x0001
266 /** There is urgent data to read */
267 #define _DBUS_POLLPRI 0x0002
268 /** Writing now will not block */
269 #define _DBUS_POLLOUT 0x0004
270 /** Error condition */
271 #define _DBUS_POLLERR 0x0008
273 #define _DBUS_POLLHUP 0x0010
274 /** Invalid request: fd not open */
275 #define _DBUS_POLLNVAL 0x0020
279 * A portable struct pollfd wrapper.
283 int fd; /**< File descriptor */
284 short events; /**< Events to poll for */
285 short revents; /**< Events that occurred */
288 int _dbus_poll (DBusPollFD *fds,
290 int timeout_milliseconds);
292 void _dbus_sleep_milliseconds (int milliseconds);
294 void _dbus_get_current_time (long *tv_sec,
298 * File/directory interface
300 dbus_bool_t _dbus_file_exists (const char *file);
301 dbus_bool_t _dbus_file_get_contents (DBusString *str,
302 const DBusString *filename,
304 dbus_bool_t _dbus_string_save_to_file (const DBusString *str,
305 const DBusString *filename,
308 dbus_bool_t _dbus_make_file_world_readable (const DBusString *filename,
311 dbus_bool_t _dbus_create_file_exclusively (const DBusString *filename,
313 dbus_bool_t _dbus_delete_file (const DBusString *filename,
315 dbus_bool_t _dbus_create_directory (const DBusString *filename,
317 dbus_bool_t _dbus_delete_directory (const DBusString *filename,
320 dbus_bool_t _dbus_concat_dir_and_file (DBusString *dir,
321 const DBusString *next_component);
322 dbus_bool_t _dbus_string_get_dirname (const DBusString *filename,
323 DBusString *dirname);
324 dbus_bool_t _dbus_path_is_absolute (const DBusString *filename);
326 dbus_bool_t _dbus_get_standard_session_servicedirs (DBusList **dirs);
327 dbus_bool_t _dbus_get_standard_system_servicedirs (DBusList **dirs);
329 dbus_bool_t _dbus_append_system_config_file (DBusString *str);
330 dbus_bool_t _dbus_append_session_config_file (DBusString *str);
332 /** Opaque type for reading a directory listing */
333 typedef struct DBusDirIter DBusDirIter;
335 DBusDirIter* _dbus_directory_open (const DBusString *filename,
337 dbus_bool_t _dbus_directory_get_next_file (DBusDirIter *iter,
338 DBusString *filename,
340 void _dbus_directory_close (DBusDirIter *iter);
342 dbus_bool_t _dbus_check_dir_is_private_to_user (DBusString *dir,
345 void _dbus_fd_set_close_on_exec (int fd);
347 const char* _dbus_get_tmpdir (void);
352 void _dbus_generate_pseudorandom_bytes_buffer (char *buffer,
354 void _dbus_generate_random_bytes_buffer (char *buffer,
356 dbus_bool_t _dbus_generate_random_bytes (DBusString *str,
358 dbus_bool_t _dbus_generate_random_ascii (DBusString *str,
361 const char* _dbus_error_from_errno (int error_number);
363 void _dbus_set_errno_to_zero (void);
364 dbus_bool_t _dbus_get_is_errno_nonzero (void);
365 dbus_bool_t _dbus_get_is_errno_eagain_or_ewouldblock (void);
366 dbus_bool_t _dbus_get_is_errno_enomem (void);
367 dbus_bool_t _dbus_get_is_errno_eintr (void);
368 dbus_bool_t _dbus_get_is_errno_epipe (void);
369 const char* _dbus_strerror_from_errno (void);
371 void _dbus_disable_sigpipe (void);
374 void _dbus_exit (int code) _DBUS_GNUC_NORETURN;
376 int _dbus_printf_string_upper_bound (const char *format,
381 * Portable struct with stat() results
385 unsigned long mode; /**< File mode */
386 unsigned long nlink; /**< Number of hard links */
387 dbus_uid_t uid; /**< User owning file */
388 dbus_gid_t gid; /**< Group owning file */
389 unsigned long size; /**< Size of file */
390 unsigned long atime; /**< Access time */
391 unsigned long mtime; /**< Modify time */
392 unsigned long ctime; /**< Creation time */
395 dbus_bool_t _dbus_stat (const DBusString *filename,
398 dbus_bool_t _dbus_full_duplex_pipe (int *fd1,
400 dbus_bool_t blocking,
403 void _dbus_print_backtrace (void);
405 dbus_bool_t _dbus_become_daemon (const DBusString *pidfile,
406 DBusPipe *print_pid_pipe,
408 dbus_bool_t keep_umask);
410 dbus_bool_t _dbus_verify_daemon_user (const char *user);
411 dbus_bool_t _dbus_change_to_daemon_user (const char *user,
414 dbus_bool_t _dbus_write_pid_to_file_and_pipe (const DBusString *pidfile,
415 DBusPipe *print_pid_pipe,
416 dbus_pid_t pid_to_write,
419 dbus_bool_t _dbus_command_for_pid (unsigned long pid,
424 /** A UNIX signal handler */
425 typedef void (* DBusSignalHandler) (int sig);
427 void _dbus_set_signal_handler (int sig,
428 DBusSignalHandler handler);
430 dbus_bool_t _dbus_user_at_console (const char *username,
433 void _dbus_init_system_log (void);
434 void _dbus_log_info (const char *msg, va_list args);
435 void _dbus_log_security (const char *msg, va_list args);
437 /* Define DBUS_VA_COPY() to do the right thing for copying va_list variables.
438 * config.h may have already defined DBUS_VA_COPY as va_copy or __va_copy.
440 #if !defined (DBUS_VA_COPY)
441 # if defined (__GNUC__) && defined (__PPC__) && (defined (_CALL_SYSV) || defined (_WIN32))
442 # define DBUS_VA_COPY(ap1, ap2) (*(ap1) = *(ap2))
443 # elif defined (DBUS_VA_COPY_AS_ARRAY)
444 # define DBUS_VA_COPY(ap1, ap2) memcpy ((ap1), (ap2), sizeof (va_list))
445 # else /* va_list is a pointer */
446 # define DBUS_VA_COPY(ap1, ap2) ((ap1) = (ap2))
447 # endif /* va_list is a pointer */
448 #endif /* !DBUS_VA_COPY */
452 * Casts a primitive C type to a byte array and then indexes
453 * a particular byte of the array.
455 #define _DBUS_BYTE_OF_PRIMITIVE(p, i) \
456 (((const char*)&(p))[(i)])
457 /** On x86 there is an 80-bit FPU, and if you do "a == b" it may have a
458 * or b in an 80-bit register, thus failing to compare the two 64-bit
459 * doubles for bitwise equality. So this macro compares the two doubles
462 #define _DBUS_DOUBLES_BITWISE_EQUAL(a, b) \
463 (_DBUS_BYTE_OF_PRIMITIVE (a, 0) == _DBUS_BYTE_OF_PRIMITIVE (b, 0) && \
464 _DBUS_BYTE_OF_PRIMITIVE (a, 1) == _DBUS_BYTE_OF_PRIMITIVE (b, 1) && \
465 _DBUS_BYTE_OF_PRIMITIVE (a, 2) == _DBUS_BYTE_OF_PRIMITIVE (b, 2) && \
466 _DBUS_BYTE_OF_PRIMITIVE (a, 3) == _DBUS_BYTE_OF_PRIMITIVE (b, 3) && \
467 _DBUS_BYTE_OF_PRIMITIVE (a, 4) == _DBUS_BYTE_OF_PRIMITIVE (b, 4) && \
468 _DBUS_BYTE_OF_PRIMITIVE (a, 5) == _DBUS_BYTE_OF_PRIMITIVE (b, 5) && \
469 _DBUS_BYTE_OF_PRIMITIVE (a, 6) == _DBUS_BYTE_OF_PRIMITIVE (b, 6) && \
470 _DBUS_BYTE_OF_PRIMITIVE (a, 7) == _DBUS_BYTE_OF_PRIMITIVE (b, 7))
472 dbus_bool_t _dbus_get_autolaunch_address (DBusString *address,
475 dbus_bool_t _dbus_lookup_session_address (dbus_bool_t *supported,
479 /** Type representing a universally unique ID
480 * @todo rename to UUID instead of GUID
482 typedef union DBusGUID DBusGUID;
484 dbus_bool_t _dbus_read_local_machine_uuid (DBusGUID *machine_id,
485 dbus_bool_t create_if_not_found,
489 * Initialize threads as in dbus_threads_init_default(), appropriately
491 * @returns #FALSE if no memory
493 dbus_bool_t _dbus_threads_init_platform_specific (void);
495 dbus_bool_t _dbus_split_paths_and_append (DBusString *dirs,
497 DBusList **dir_list);
499 unsigned long _dbus_pid_for_log (void);
501 /* FIXME move back to dbus-sysdeps-unix.h probably -
502 * the PID file handling just needs a little more abstraction
503 * in the bus daemon first.
505 dbus_pid_t _dbus_getpid (void);
507 void _dbus_flush_caches (void);
513 #endif /* DBUS_SYSDEPS_H */