1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* dbus-sysdeps.c 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include "dbus-internals.h"
26 #include "dbus-sysdeps.h"
27 #include "dbus-threads.h"
28 #include "dbus-protocol.h"
29 #include "dbus-test.h"
30 #include <sys/types.h>
38 #include <sys/socket.h>
47 #include <netinet/in.h>
66 #ifndef HAVE_SOCKLEN_T
71 * @addtogroup DBusInternalsUtils
75 * Aborts the program with SIGABRT (dumping core).
80 #ifdef DBUS_ENABLE_VERBOSE_MODE
82 s = _dbus_getenv ("DBUS_PRINT_BACKTRACE");
84 _dbus_print_backtrace ();
87 _exit (1); /* in case someone manages to ignore SIGABRT */
91 * Wrapper for setenv(). If the value is #NULL, unsets
92 * the environment variable.
94 * @todo if someone can verify it's safe, we could avoid the
95 * memleak when doing an unset.
97 * @param varname name of environment variable
98 * @param value value of environment variable
99 * @returns #TRUE on success.
102 _dbus_setenv (const char *varname,
105 _dbus_assert (varname != NULL);
116 len = strlen (varname);
118 /* Use system malloc to avoid memleaks that dbus_malloc
119 * will get upset about.
122 putenv_value = malloc (len + 1);
123 if (putenv_value == NULL)
126 strcpy (putenv_value, varname);
128 return (putenv (putenv_value) == 0);
134 return (setenv (varname, value, TRUE) == 0);
141 varname_len = strlen (varname);
142 value_len = strlen (value);
144 len = varname_len + value_len + 1 /* '=' */ ;
146 /* Use system malloc to avoid memleaks that dbus_malloc
147 * will get upset about.
150 putenv_value = malloc (len + 1);
151 if (putenv_value == NULL)
154 strcpy (putenv_value, varname);
155 strcpy (putenv_value + varname_len, "=");
156 strcpy (putenv_value + varname_len + 1, value);
158 return (putenv (putenv_value) == 0);
164 * Wrapper for getenv().
166 * @param varname name of environment variable
167 * @returns value of environment variable or #NULL if unset
170 _dbus_getenv (const char *varname)
172 return getenv (varname);
176 * Thin wrapper around the read() system call that appends
177 * the data it reads to the DBusString buffer. It appends
178 * up to the given count, and returns the same value
179 * and same errno as read(). The only exception is that
180 * _dbus_read() handles EINTR for you. _dbus_read() can
181 * return ENOMEM, even though regular UNIX read doesn't.
183 * @param fd the file descriptor to read from
184 * @param buffer the buffer to append data to
185 * @param count the amount of data to read
186 * @returns the number of bytes read or -1
197 _dbus_assert (count >= 0);
199 start = _dbus_string_get_length (buffer);
201 if (!_dbus_string_lengthen (buffer, count))
207 data = _dbus_string_get_data_len (buffer, start, count);
211 bytes_read = read (fd, data, count);
219 /* put length back (note that this doesn't actually realloc anything) */
220 _dbus_string_set_length (buffer, start);
226 /* put length back (doesn't actually realloc) */
227 _dbus_string_set_length (buffer, start + bytes_read);
231 _dbus_verbose_bytes_of_string (buffer, start, bytes_read);
239 * Thin wrapper around the write() system call that writes a part of a
240 * DBusString and handles EINTR for you.
242 * @param fd the file descriptor to write
243 * @param buffer the buffer to write data from
244 * @param start the first byte in the buffer to write
245 * @param len the number of bytes to try to write
246 * @returns the number of bytes written or -1 on error
250 const DBusString *buffer,
257 data = _dbus_string_get_const_data_len (buffer, start, len);
261 bytes_written = write (fd, data, len);
263 if (bytes_written < 0 && errno == EINTR)
267 if (bytes_written > 0)
268 _dbus_verbose_bytes_of_string (buffer, start, bytes_written);
271 return bytes_written;
275 * Like _dbus_write() but will use writev() if possible
276 * to write both buffers in sequence. The return value
277 * is the number of bytes written in the first buffer,
278 * plus the number written in the second. If the first
279 * buffer is written successfully and an error occurs
280 * writing the second, the number of bytes in the first
281 * is returned (i.e. the error is ignored), on systems that
282 * don't have writev. Handles EINTR for you.
283 * The second buffer may be #NULL.
285 * @param fd the file descriptor
286 * @param buffer1 first buffer
287 * @param start1 first byte to write in first buffer
288 * @param len1 number of bytes to write from first buffer
289 * @param buffer2 second buffer, or #NULL
290 * @param start2 first byte to write in second buffer
291 * @param len2 number of bytes to write in second buffer
292 * @returns total bytes written from both buffers, or -1 on error
295 _dbus_write_two (int fd,
296 const DBusString *buffer1,
299 const DBusString *buffer2,
303 _dbus_assert (buffer1 != NULL);
304 _dbus_assert (start1 >= 0);
305 _dbus_assert (start2 >= 0);
306 _dbus_assert (len1 >= 0);
307 _dbus_assert (len2 >= 0);
311 struct iovec vectors[2];
316 data1 = _dbus_string_get_const_data_len (buffer1, start1, len1);
319 data2 = _dbus_string_get_const_data_len (buffer2, start2, len2);
327 vectors[0].iov_base = (char*) data1;
328 vectors[0].iov_len = len1;
329 vectors[1].iov_base = (char*) data2;
330 vectors[1].iov_len = len2;
334 bytes_written = writev (fd,
338 if (bytes_written < 0 && errno == EINTR)
341 return bytes_written;
343 #else /* HAVE_WRITEV */
347 ret1 = _dbus_write (fd, buffer1, start1, len1);
348 if (ret1 == len1 && buffer2 != NULL)
350 ret2 = _dbus_write (fd, buffer2, start2, len2);
352 ret2 = 0; /* we can't report an error as the first write was OK */
359 #endif /* !HAVE_WRITEV */
362 #define _DBUS_MAX_SUN_PATH_LENGTH 99
365 * @def _DBUS_MAX_SUN_PATH_LENGTH
367 * Maximum length of the path to a UNIX domain socket,
368 * sockaddr_un::sun_path member. POSIX requires that all systems
369 * support at least 100 bytes here, including the nul termination.
370 * We use 99 for the max value to allow for the nul.
372 * We could probably also do sizeof (addr.sun_path)
373 * but this way we are the same on all platforms
374 * which is probably a good idea.
378 * Creates a socket and connects it to the UNIX domain socket at the
379 * given path. The connection fd is returned, and is set up as
382 * Uses abstract sockets instead of filesystem-linked sockets if
383 * requested (it's possible only on Linux; see "man 7 unix" on Linux).
384 * On non-Linux abstract socket usage always fails.
386 * @param path the path to UNIX domain socket
387 * @param abstract #TRUE to use abstract namespace
388 * @param error return location for error code
389 * @returns connection file descriptor or -1 on error
392 _dbus_connect_unix_socket (const char *path,
393 dbus_bool_t abstract,
397 struct sockaddr_un addr;
399 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
401 _dbus_verbose ("connecting to unix socket %s abstract=%d\n",
404 fd = socket (PF_UNIX, SOCK_STREAM, 0);
408 dbus_set_error (error,
409 _dbus_error_from_errno (errno),
410 "Failed to create socket: %s",
411 _dbus_strerror (errno));
417 addr.sun_family = AF_UNIX;
421 #ifdef HAVE_ABSTRACT_SOCKETS
422 /* remember that abstract names aren't nul-terminated so we rely
423 * on sun_path being filled in with zeroes above.
425 addr.sun_path[0] = '\0'; /* this is what says "use abstract" */
426 strncpy (&addr.sun_path[1], path, _DBUS_MAX_SUN_PATH_LENGTH - 2);
427 /* _dbus_verbose_bytes (addr.sun_path, sizeof (addr.sun_path)); */
428 #else /* HAVE_ABSTRACT_SOCKETS */
429 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED,
430 "Operating system does not support abstract socket namespace\n");
433 #endif /* ! HAVE_ABSTRACT_SOCKETS */
437 strncpy (addr.sun_path, path, _DBUS_MAX_SUN_PATH_LENGTH - 1);
440 if (connect (fd, (struct sockaddr*) &addr, sizeof (addr)) < 0)
442 dbus_set_error (error,
443 _dbus_error_from_errno (errno),
444 "Failed to connect to socket %s: %s",
445 path, _dbus_strerror (errno));
453 if (!_dbus_set_fd_nonblocking (fd, error))
455 _DBUS_ASSERT_ERROR_IS_SET (error);
467 * Creates a socket and binds it to the given path,
468 * then listens on the socket. The socket is
469 * set to be nonblocking.
471 * Uses abstract sockets instead of filesystem-linked
472 * sockets if requested (it's possible only on Linux;
473 * see "man 7 unix" on Linux).
474 * On non-Linux abstract socket usage always fails.
476 * @param path the socket name
477 * @param abstract #TRUE to use abstract namespace
478 * @param error return location for errors
479 * @returns the listening file descriptor or -1 on error
482 _dbus_listen_unix_socket (const char *path,
483 dbus_bool_t abstract,
487 struct sockaddr_un addr;
489 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
491 _dbus_verbose ("listening on unix socket %s abstract=%d\n",
494 listen_fd = socket (PF_UNIX, SOCK_STREAM, 0);
498 dbus_set_error (error, _dbus_error_from_errno (errno),
499 "Failed to create socket \"%s\": %s",
500 path, _dbus_strerror (errno));
505 addr.sun_family = AF_UNIX;
509 #ifdef HAVE_ABSTRACT_SOCKETS
510 /* remember that abstract names aren't nul-terminated so we rely
511 * on sun_path being filled in with zeroes above.
513 addr.sun_path[0] = '\0'; /* this is what says "use abstract" */
514 strncpy (&addr.sun_path[1], path, _DBUS_MAX_SUN_PATH_LENGTH - 2);
515 /* _dbus_verbose_bytes (addr.sun_path, sizeof (addr.sun_path)); */
516 #else /* HAVE_ABSTRACT_SOCKETS */
517 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED,
518 "Operating system does not support abstract socket namespace\n");
521 #endif /* ! HAVE_ABSTRACT_SOCKETS */
525 /* FIXME discussed security implications of this with Nalin,
526 * and we couldn't think of where it would kick our ass, but
527 * it still seems a bit sucky. It also has non-security suckage;
528 * really we'd prefer to exit if the socket is already in use.
529 * But there doesn't seem to be a good way to do this.
531 * Just to be extra careful, I threw in the stat() - clearly
532 * the stat() can't *fix* any security issue, but it at least
533 * avoids inadvertent/accidental data loss.
538 if (stat (path, &sb) == 0 &&
539 S_ISSOCK (sb.st_mode))
543 strncpy (addr.sun_path, path, _DBUS_MAX_SUN_PATH_LENGTH - 1);
546 if (bind (listen_fd, (struct sockaddr*) &addr, sizeof (addr)) < 0)
548 dbus_set_error (error, _dbus_error_from_errno (errno),
549 "Failed to bind socket \"%s\": %s",
550 path, _dbus_strerror (errno));
555 if (listen (listen_fd, 30 /* backlog */) < 0)
557 dbus_set_error (error, _dbus_error_from_errno (errno),
558 "Failed to listen on socket \"%s\": %s",
559 path, _dbus_strerror (errno));
564 if (!_dbus_set_fd_nonblocking (listen_fd, error))
566 _DBUS_ASSERT_ERROR_IS_SET (error);
571 /* Try opening up the permissions, but if we can't, just go ahead
572 * and continue, maybe it will be good enough.
574 if (!abstract && chmod (path, 0777) < 0)
575 _dbus_warn ("Could not set mode 0777 on socket %s\n",
582 * Creates a socket and connects to a socket at the given host
583 * and port. The connection fd is returned, and is set up as
586 * @param host the host name to connect to
587 * @param port the prot to connect to
588 * @param error return location for error code
589 * @returns connection file descriptor or -1 on error
592 _dbus_connect_tcp_socket (const char *host,
597 struct sockaddr_in addr;
599 struct in_addr *haddr;
601 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
603 fd = socket (AF_INET, SOCK_STREAM, 0);
607 dbus_set_error (error,
608 _dbus_error_from_errno (errno),
609 "Failed to create socket: %s",
610 _dbus_strerror (errno));
618 he = gethostbyname (host);
621 dbus_set_error (error,
622 _dbus_error_from_errno (errno),
623 "Failed to lookup hostname: %s",
629 haddr = ((struct in_addr *) (he->h_addr_list)[0]);
632 memcpy (&addr.sin_addr, haddr, sizeof(struct in_addr));
633 addr.sin_family = AF_INET;
634 addr.sin_port = htons (port);
636 if (connect (fd, (struct sockaddr*) &addr, sizeof (addr)) < 0)
638 dbus_set_error (error,
639 _dbus_error_from_errno (errno),
640 "Failed to connect to socket %s: %s:%d",
641 host, _dbus_strerror (errno), port);
649 if (!_dbus_set_fd_nonblocking (fd, error))
661 * Creates a socket and binds it to the given path,
662 * then listens on the socket. The socket is
663 * set to be nonblocking.
665 * @param host the host name to listen on
666 * @param port the prot to listen on
667 * @param error return location for errors
668 * @returns the listening file descriptor or -1 on error
671 _dbus_listen_tcp_socket (const char *host,
676 struct sockaddr_in addr;
678 struct in_addr *haddr;
680 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
682 listen_fd = socket (AF_INET, SOCK_STREAM, 0);
686 dbus_set_error (error, _dbus_error_from_errno (errno),
687 "Failed to create socket \"%s:%d\": %s",
688 host, port, _dbus_strerror (errno));
692 he = gethostbyname (host);
695 dbus_set_error (error,
696 _dbus_error_from_errno (errno),
697 "Failed to lookup hostname: %s",
703 haddr = ((struct in_addr *) (he->h_addr_list)[0]);
706 memcpy (&addr.sin_addr, haddr, sizeof (struct in_addr));
707 addr.sin_family = AF_INET;
708 addr.sin_port = htons (port);
710 if (bind (listen_fd, (struct sockaddr*) &addr, sizeof (struct sockaddr)))
712 dbus_set_error (error, _dbus_error_from_errno (errno),
713 "Failed to bind socket \"%s:%d\": %s",
714 host, port, _dbus_strerror (errno));
719 if (listen (listen_fd, 30 /* backlog */) < 0)
721 dbus_set_error (error, _dbus_error_from_errno (errno),
722 "Failed to listen on socket \"%s:%d\": %s",
723 host, port, _dbus_strerror (errno));
728 if (!_dbus_set_fd_nonblocking (listen_fd, error))
738 write_credentials_byte (int server_fd,
742 char buf[1] = { '\0' };
744 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
748 bytes_written = write (server_fd, buf, 1);
750 if (bytes_written < 0 && errno == EINTR)
753 if (bytes_written < 0)
755 dbus_set_error (error, _dbus_error_from_errno (errno),
756 "Failed to write credentials byte: %s",
757 _dbus_strerror (errno));
760 else if (bytes_written == 0)
762 dbus_set_error (error, DBUS_ERROR_IO_ERROR,
763 "wrote zero bytes writing credentials byte");
768 _dbus_assert (bytes_written == 1);
769 _dbus_verbose ("wrote credentials byte\n");
775 * Reads a single byte which must be nul (an error occurs otherwise),
776 * and reads unix credentials if available. Fills in pid/uid/gid with
777 * -1 if no credentials are available. Return value indicates whether
778 * a byte was read, not whether we got valid credentials. On some
779 * systems, such as Linux, reading/writing the byte isn't actually
780 * required, but we do it anyway just to avoid multiple codepaths.
782 * Fails if no byte is available, so you must select() first.
784 * The point of the byte is that on some systems we have to
785 * use sendmsg()/recvmsg() to transmit credentials.
787 * @param client_fd the client file descriptor
788 * @param credentials struct to fill with credentials of client
789 * @param error location to store error code
790 * @returns #TRUE on success
793 _dbus_read_credentials_unix_socket (int client_fd,
794 DBusCredentials *credentials,
802 char cmsgmem[CMSG_SPACE (sizeof (struct cmsgcred))];
803 struct cmsghdr *cmsg = (struct cmsghdr *) cmsgmem;
806 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
808 /* The POSIX spec certainly doesn't promise this, but
809 * we need these assertions to fail as soon as we're wrong about
810 * it so we can do the porting fixups
812 _dbus_assert (sizeof (pid_t) <= sizeof (credentials->pid));
813 _dbus_assert (sizeof (uid_t) <= sizeof (credentials->uid));
814 _dbus_assert (sizeof (gid_t) <= sizeof (credentials->gid));
816 _dbus_credentials_clear (credentials);
818 #if defined(LOCAL_CREDS) && defined(HAVE_CMSGCRED)
819 /* Set the socket to receive credentials on the next message */
822 if (setsockopt (client_fd, 0, LOCAL_CREDS, &on, sizeof (on)) < 0)
824 _dbus_verbose ("Unable to set LOCAL_CREDS socket option\n");
833 memset (&msg, 0, sizeof (msg));
838 memset (cmsgmem, 0, sizeof (cmsgmem));
839 msg.msg_control = cmsgmem;
840 msg.msg_controllen = sizeof (cmsgmem);
844 if (recvmsg (client_fd, &msg, 0) < 0)
849 dbus_set_error (error, _dbus_error_from_errno (errno),
850 "Failed to read credentials byte: %s",
851 _dbus_strerror (errno));
857 dbus_set_error (error, DBUS_ERROR_FAILED,
858 "Credentials byte was not nul");
863 if (cmsg->cmsg_len < sizeof (cmsgmem) || cmsg->cmsg_type != SCM_CREDS)
865 dbus_set_error (error, DBUS_ERROR_FAILED);
866 _dbus_verbose ("Message from recvmsg() was not SCM_CREDS\n");
871 _dbus_verbose ("read credentials byte\n");
876 int cr_len = sizeof (cr);
878 if (getsockopt (client_fd, SOL_SOCKET, SO_PEERCRED, &cr, &cr_len) == 0 &&
879 cr_len == sizeof (cr))
881 credentials->pid = cr.pid;
882 credentials->uid = cr.uid;
883 credentials->gid = cr.gid;
887 _dbus_verbose ("Failed to getsockopt() credentials, returned len %d/%d: %s\n",
888 cr_len, (int) sizeof (cr), _dbus_strerror (errno));
890 #elif defined(HAVE_CMSGCRED)
891 struct cmsgcred *cred;
893 cred = (struct cmsgcred *) CMSG_DATA (cmsg);
895 credentials->pid = cred->cmcred_pid;
896 credentials->uid = cred->cmcred_euid;
897 credentials->gid = cred->cmcred_groups[0];
898 #else /* !SO_PEERCRED && !HAVE_CMSGCRED */
899 _dbus_verbose ("Socket credentials not supported on this OS\n");
903 _dbus_verbose ("Credentials:"
904 " pid "DBUS_PID_FORMAT
905 " uid "DBUS_UID_FORMAT
906 " gid "DBUS_GID_FORMAT"\n",
915 * Sends a single nul byte with our UNIX credentials as ancillary
916 * data. Returns #TRUE if the data was successfully written. On
917 * systems that don't support sending credentials, just writes a byte,
918 * doesn't send any credentials. On some systems, such as Linux,
919 * reading/writing the byte isn't actually required, but we do it
920 * anyway just to avoid multiple codepaths.
922 * Fails if no byte can be written, so you must select() first.
924 * The point of the byte is that on some systems we have to
925 * use sendmsg()/recvmsg() to transmit credentials.
927 * @param server_fd file descriptor for connection to server
928 * @param error return location for error code
929 * @returns #TRUE if the byte was sent
932 _dbus_send_credentials_unix_socket (int server_fd,
935 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
937 if (write_credentials_byte (server_fd, error))
944 * Accepts a connection on a listening socket.
945 * Handles EINTR for you.
947 * @param listen_fd the listen file descriptor
948 * @returns the connection fd of the client, or -1 on error
951 _dbus_accept (int listen_fd)
954 struct sockaddr addr;
957 addrlen = sizeof (addr);
960 client_fd = accept (listen_fd, &addr, &addrlen);
974 * @addtogroup DBusString
979 * Appends an integer to a DBusString.
981 * @param str the string
982 * @param value the integer value
983 * @returns #FALSE if not enough memory or other failure.
986 _dbus_string_append_int (DBusString *str,
989 /* this calculation is from comp.lang.c faq */
990 #define MAX_LONG_LEN ((sizeof (long) * 8 + 2) / 3 + 1) /* +1 for '-' */
995 orig_len = _dbus_string_get_length (str);
997 if (!_dbus_string_lengthen (str, MAX_LONG_LEN))
1000 buf = _dbus_string_get_data_len (str, orig_len, MAX_LONG_LEN);
1002 snprintf (buf, MAX_LONG_LEN, "%ld", value);
1011 _dbus_string_shorten (str, MAX_LONG_LEN - i);
1017 * Appends an unsigned integer to a DBusString.
1019 * @param str the string
1020 * @param value the integer value
1021 * @returns #FALSE if not enough memory or other failure.
1024 _dbus_string_append_uint (DBusString *str,
1025 unsigned long value)
1027 /* this is wrong, but definitely on the high side. */
1028 #define MAX_ULONG_LEN (MAX_LONG_LEN * 2)
1033 orig_len = _dbus_string_get_length (str);
1035 if (!_dbus_string_lengthen (str, MAX_ULONG_LEN))
1038 buf = _dbus_string_get_data_len (str, orig_len, MAX_ULONG_LEN);
1040 snprintf (buf, MAX_ULONG_LEN, "%lu", value);
1049 _dbus_string_shorten (str, MAX_ULONG_LEN - i);
1055 * Appends a double to a DBusString.
1057 * @param str the string
1058 * @param value the floating point value
1059 * @returns #FALSE if not enough memory or other failure.
1062 _dbus_string_append_double (DBusString *str,
1065 #define MAX_DOUBLE_LEN 64 /* this is completely made up :-/ */
1070 orig_len = _dbus_string_get_length (str);
1072 if (!_dbus_string_lengthen (str, MAX_DOUBLE_LEN))
1075 buf = _dbus_string_get_data_len (str, orig_len, MAX_DOUBLE_LEN);
1077 snprintf (buf, MAX_LONG_LEN, "%g", value);
1086 _dbus_string_shorten (str, MAX_DOUBLE_LEN - i);
1092 * Parses an integer contained in a DBusString. Either return parameter
1093 * may be #NULL if you aren't interested in it. The integer is parsed
1094 * and stored in value_return. Return parameters are not initialized
1095 * if the function returns #FALSE.
1097 * @param str the string
1098 * @param start the byte index of the start of the integer
1099 * @param value_return return location of the integer value or #NULL
1100 * @param end_return return location of the end of the integer, or #NULL
1101 * @returns #TRUE on success
1104 _dbus_string_parse_int (const DBusString *str,
1113 p = _dbus_string_get_const_data_len (str, start,
1114 _dbus_string_get_length (str) - start);
1118 v = strtol (p, &end, 0);
1119 if (end == NULL || end == p || errno != 0)
1125 *end_return = start + (end - p);
1130 #ifdef DBUS_BUILD_TESTS
1131 /* Not currently used, so only built when tests are enabled */
1133 * Parses an unsigned integer contained in a DBusString. Either return
1134 * parameter may be #NULL if you aren't interested in it. The integer
1135 * is parsed and stored in value_return. Return parameters are not
1136 * initialized if the function returns #FALSE.
1138 * @param str the string
1139 * @param start the byte index of the start of the integer
1140 * @param value_return return location of the integer value or #NULL
1141 * @param end_return return location of the end of the integer, or #NULL
1142 * @returns #TRUE on success
1145 _dbus_string_parse_uint (const DBusString *str,
1147 unsigned long *value_return,
1154 p = _dbus_string_get_const_data_len (str, start,
1155 _dbus_string_get_length (str) - start);
1159 v = strtoul (p, &end, 0);
1160 if (end == NULL || end == p || errno != 0)
1166 *end_return = start + (end - p);
1170 #endif /* DBUS_BUILD_TESTS */
1173 ascii_isspace (char c)
1184 ascii_isdigit (char c)
1186 return c >= '0' && c <= '9';
1190 ascii_isxdigit (char c)
1192 return (ascii_isdigit (c) ||
1193 (c >= 'a' && c <= 'f') ||
1194 (c >= 'A' && c <= 'F'));
1198 /* Calls strtod in a locale-independent fashion, by looking at
1199 * the locale data and patching the decimal comma to a point.
1201 * Relicensed from glib.
1204 ascii_strtod (const char *nptr,
1209 struct lconv *locale_data;
1210 const char *decimal_point;
1211 int decimal_point_len;
1212 const char *p, *decimal_point_pos;
1213 const char *end = NULL; /* Silence gcc */
1217 locale_data = localeconv ();
1218 decimal_point = locale_data->decimal_point;
1219 decimal_point_len = strlen (decimal_point);
1221 _dbus_assert (decimal_point_len != 0);
1223 decimal_point_pos = NULL;
1224 if (decimal_point[0] != '.' ||
1225 decimal_point[1] != 0)
1228 /* Skip leading space */
1229 while (ascii_isspace (*p))
1232 /* Skip leading optional sign */
1233 if (*p == '+' || *p == '-')
1237 (p[1] == 'x' || p[1] == 'X'))
1240 /* HEX - find the (optional) decimal point */
1242 while (ascii_isxdigit (*p))
1247 decimal_point_pos = p++;
1249 while (ascii_isxdigit (*p))
1252 if (*p == 'p' || *p == 'P')
1254 if (*p == '+' || *p == '-')
1256 while (ascii_isdigit (*p))
1263 while (ascii_isdigit (*p))
1268 decimal_point_pos = p++;
1270 while (ascii_isdigit (*p))
1273 if (*p == 'e' || *p == 'E')
1275 if (*p == '+' || *p == '-')
1277 while (ascii_isdigit (*p))
1282 /* For the other cases, we need not convert the decimal point */
1285 /* Set errno to zero, so that we can distinguish zero results
1289 if (decimal_point_pos)
1293 /* We need to convert the '.' to the locale specific decimal point */
1294 copy = dbus_malloc (end - nptr + 1 + decimal_point_len);
1297 memcpy (c, nptr, decimal_point_pos - nptr);
1298 c += decimal_point_pos - nptr;
1299 memcpy (c, decimal_point, decimal_point_len);
1300 c += decimal_point_len;
1301 memcpy (c, decimal_point_pos + 1, end - (decimal_point_pos + 1));
1302 c += end - (decimal_point_pos + 1);
1305 val = strtod (copy, &fail_pos);
1309 if (fail_pos > decimal_point_pos)
1310 fail_pos = (char *)nptr + (fail_pos - copy) - (decimal_point_len - 1);
1312 fail_pos = (char *)nptr + (fail_pos - copy);
1319 val = strtod (nptr, &fail_pos);
1329 * Parses a floating point number contained in a DBusString. Either
1330 * return parameter may be #NULL if you aren't interested in it. The
1331 * integer is parsed and stored in value_return. Return parameters are
1332 * not initialized if the function returns #FALSE.
1334 * @param str the string
1335 * @param start the byte index of the start of the float
1336 * @param value_return return location of the float value or #NULL
1337 * @param end_return return location of the end of the float, or #NULL
1338 * @returns #TRUE on success
1341 _dbus_string_parse_double (const DBusString *str,
1343 double *value_return,
1350 p = _dbus_string_get_const_data_len (str, start,
1351 _dbus_string_get_length (str) - start);
1355 v = ascii_strtod (p, &end);
1356 if (end == NULL || end == p || errno != 0)
1362 *end_return = start + (end - p);
1367 /** @} */ /* DBusString group */
1370 * @addtogroup DBusInternalsUtils
1374 fill_user_info_from_passwd (struct passwd *p,
1378 _dbus_assert (p->pw_name != NULL);
1379 _dbus_assert (p->pw_dir != NULL);
1381 info->uid = p->pw_uid;
1382 info->primary_gid = p->pw_gid;
1383 info->username = _dbus_strdup (p->pw_name);
1384 info->homedir = _dbus_strdup (p->pw_dir);
1386 if (info->username == NULL ||
1387 info->homedir == NULL)
1389 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1397 fill_user_info (DBusUserInfo *info,
1399 const DBusString *username,
1402 const char *username_c;
1404 /* exactly one of username/uid provided */
1405 _dbus_assert (username != NULL || uid != DBUS_UID_UNSET);
1406 _dbus_assert (username == NULL || uid == DBUS_UID_UNSET);
1408 info->uid = DBUS_UID_UNSET;
1409 info->primary_gid = DBUS_GID_UNSET;
1410 info->group_ids = NULL;
1411 info->n_group_ids = 0;
1412 info->username = NULL;
1413 info->homedir = NULL;
1415 if (username != NULL)
1416 username_c = _dbus_string_get_const_data (username);
1420 /* For now assuming that the getpwnam() and getpwuid() flavors
1421 * are always symmetrical, if not we have to add more configure
1425 #if defined (HAVE_POSIX_GETPWNAME_R) || defined (HAVE_NONPOSIX_GETPWNAME_R)
1430 struct passwd p_str;
1433 #ifdef HAVE_POSIX_GETPWNAME_R
1435 result = getpwuid_r (uid, &p_str, buf, sizeof (buf),
1438 result = getpwnam_r (username_c, &p_str, buf, sizeof (buf),
1441 if (uid != DBUS_UID_UNSET)
1442 p = getpwuid_r (uid, &p_str, buf, sizeof (buf));
1444 p = getpwnam_r (username_c, &p_str, buf, sizeof (buf));
1446 #endif /* !HAVE_POSIX_GETPWNAME_R */
1447 if (result == 0 && p == &p_str)
1449 if (!fill_user_info_from_passwd (p, info, error))
1454 dbus_set_error (error, _dbus_error_from_errno (errno),
1455 "User \"%s\" unknown or no memory to allocate password entry\n",
1456 username_c ? username_c : "???");
1457 _dbus_verbose ("User %s unknown\n", username_c ? username_c : "???");
1461 #else /* ! HAVE_GETPWNAM_R */
1463 /* I guess we're screwed on thread safety here */
1466 if (uid != DBUS_UID_UNSET)
1469 p = getpwnam (username_c);
1473 if (!fill_user_info_from_passwd (p, info, error))
1478 dbus_set_error (error, _dbus_error_from_errno (errno),
1479 "User \"%s\" unknown or no memory to allocate password entry\n",
1480 username_c ? username_c : "???");
1481 _dbus_verbose ("User %s unknown\n", username_c ? username_c : "???");
1485 #endif /* ! HAVE_GETPWNAM_R */
1487 /* Fill this in so we can use it to get groups */
1488 username_c = info->username;
1490 #ifdef HAVE_GETGROUPLIST
1497 buf = dbus_new (gid_t, buf_count);
1500 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1504 if (getgrouplist (username_c,
1506 buf, &buf_count) < 0)
1508 gid_t *new = dbus_realloc (buf, buf_count * sizeof (buf[0]));
1511 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1519 if (getgrouplist (username_c, info->primary_gid, buf, &buf_count) < 0)
1521 dbus_set_error (error,
1522 _dbus_error_from_errno (errno),
1523 "Failed to get groups for username \"%s\" primary GID "
1524 DBUS_GID_FORMAT ": %s\n",
1525 username_c, info->primary_gid,
1526 _dbus_strerror (errno));
1532 info->group_ids = dbus_new (dbus_gid_t, buf_count);
1533 if (info->group_ids == NULL)
1535 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1540 for (i = 0; i < buf_count; ++i)
1541 info->group_ids[i] = buf[i];
1543 info->n_group_ids = buf_count;
1547 #else /* HAVE_GETGROUPLIST */
1549 /* We just get the one group ID */
1550 info->group_ids = dbus_new (dbus_gid_t, 1);
1551 if (info->group_ids == NULL)
1553 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1557 info->n_group_ids = 1;
1559 (info->group_ids)[0] = info->primary_gid;
1561 #endif /* HAVE_GETGROUPLIST */
1563 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1568 _DBUS_ASSERT_ERROR_IS_SET (error);
1573 * Gets user info for the given username.
1575 * @param info user info object to initialize
1576 * @param username the username
1577 * @param error error return
1578 * @returns #TRUE on success
1581 _dbus_user_info_fill (DBusUserInfo *info,
1582 const DBusString *username,
1585 return fill_user_info (info, DBUS_UID_UNSET,
1590 * Gets user info for the given user ID.
1592 * @param info user info object to initialize
1593 * @param uid the user ID
1594 * @param error error return
1595 * @returns #TRUE on success
1598 _dbus_user_info_fill_uid (DBusUserInfo *info,
1602 return fill_user_info (info, uid,
1607 * Frees the members of info
1608 * (but not info itself)
1609 * @param info the user info struct
1612 _dbus_user_info_free (DBusUserInfo *info)
1614 dbus_free (info->group_ids);
1615 dbus_free (info->username);
1616 dbus_free (info->homedir);
1620 fill_user_info_from_group (struct group *g,
1621 DBusGroupInfo *info,
1624 _dbus_assert (g->gr_name != NULL);
1626 info->gid = g->gr_gid;
1627 info->groupname = _dbus_strdup (g->gr_name);
1629 /* info->members = dbus_strdupv (g->gr_mem) */
1631 if (info->groupname == NULL)
1633 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1641 fill_group_info (DBusGroupInfo *info,
1643 const DBusString *groupname,
1646 const char *group_c_str;
1648 _dbus_assert (groupname != NULL || gid != DBUS_GID_UNSET);
1649 _dbus_assert (groupname == NULL || gid == DBUS_GID_UNSET);
1652 group_c_str = _dbus_string_get_const_data (groupname);
1656 /* For now assuming that the getgrnam() and getgrgid() flavors
1657 * always correspond to the pwnam flavors, if not we have
1658 * to add more configure checks.
1661 #if defined (HAVE_POSIX_GETPWNAME_R) || defined (HAVE_NONPOSIX_GETPWNAME_R)
1669 #ifdef HAVE_POSIX_GETPWNAME_R
1672 result = getgrnam_r (group_c_str, &g_str, buf, sizeof (buf),
1675 result = getgrgid_r (gid, &g_str, buf, sizeof (buf),
1678 p = getgrnam_r (group_c_str, &g_str, buf, sizeof (buf));
1680 #endif /* !HAVE_POSIX_GETPWNAME_R */
1681 if (result == 0 && g == &g_str)
1683 return fill_user_info_from_group (g, info, error);
1687 dbus_set_error (error, _dbus_error_from_errno (errno),
1688 "Group %s unknown or failed to look it up\n",
1689 group_c_str ? group_c_str : "???");
1693 #else /* ! HAVE_GETPWNAM_R */
1695 /* I guess we're screwed on thread safety here */
1698 g = getgrnam (group_c_str);
1702 return fill_user_info_from_group (g, info, error);
1706 dbus_set_error (error, _dbus_error_from_errno (errno),
1707 "Group %s unknown or failed to look it up\n",
1708 group_c_str ? group_c_str : "???");
1712 #endif /* ! HAVE_GETPWNAM_R */
1716 * Initializes the given DBusGroupInfo struct
1717 * with information about the given group name.
1719 * @param info the group info struct
1720 * @param groupname name of group
1721 * @param error the error return
1722 * @returns #FALSE if error is set
1725 _dbus_group_info_fill (DBusGroupInfo *info,
1726 const DBusString *groupname,
1729 return fill_group_info (info, DBUS_GID_UNSET,
1735 * Initializes the given DBusGroupInfo struct
1736 * with information about the given group ID.
1738 * @param info the group info struct
1739 * @param gid group ID
1740 * @param error the error return
1741 * @returns #FALSE if error is set
1744 _dbus_group_info_fill_gid (DBusGroupInfo *info,
1748 return fill_group_info (info, gid, NULL, error);
1752 * Frees the members of info (but not info itself).
1754 * @param info the group info
1757 _dbus_group_info_free (DBusGroupInfo *info)
1759 dbus_free (info->groupname);
1763 * Sets fields in DBusCredentials to DBUS_PID_UNSET,
1764 * DBUS_UID_UNSET, DBUS_GID_UNSET.
1766 * @param credentials the credentials object to fill in
1769 _dbus_credentials_clear (DBusCredentials *credentials)
1771 credentials->pid = DBUS_PID_UNSET;
1772 credentials->uid = DBUS_UID_UNSET;
1773 credentials->gid = DBUS_GID_UNSET;
1777 * Gets the credentials of the current process.
1779 * @param credentials credentials to fill in.
1782 _dbus_credentials_from_current_process (DBusCredentials *credentials)
1784 /* The POSIX spec certainly doesn't promise this, but
1785 * we need these assertions to fail as soon as we're wrong about
1786 * it so we can do the porting fixups
1788 _dbus_assert (sizeof (pid_t) <= sizeof (credentials->pid));
1789 _dbus_assert (sizeof (uid_t) <= sizeof (credentials->uid));
1790 _dbus_assert (sizeof (gid_t) <= sizeof (credentials->gid));
1792 credentials->pid = getpid ();
1793 credentials->uid = getuid ();
1794 credentials->gid = getgid ();
1798 * Checks whether the provided_credentials are allowed to log in
1799 * as the expected_credentials.
1801 * @param expected_credentials credentials we're trying to log in as
1802 * @param provided_credentials credentials we have
1803 * @returns #TRUE if we can log in
1806 _dbus_credentials_match (const DBusCredentials *expected_credentials,
1807 const DBusCredentials *provided_credentials)
1809 if (provided_credentials->uid == DBUS_UID_UNSET)
1811 else if (expected_credentials->uid == DBUS_UID_UNSET)
1813 else if (provided_credentials->uid == 0)
1815 else if (provided_credentials->uid == expected_credentials->uid)
1822 * Gets our process ID
1823 * @returns process ID
1832 * @returns process UID
1841 * @returns process GID
1849 _DBUS_DEFINE_GLOBAL_LOCK (atomic);
1851 #ifdef DBUS_USE_ATOMIC_INT_486
1852 /* Taken from CVS version 1.7 of glibc's sysdeps/i386/i486/atomicity.h */
1853 /* Since the asm stuff here is gcc-specific we go ahead and use "inline" also */
1854 static inline dbus_int32_t
1855 atomic_exchange_and_add (DBusAtomic *atomic,
1856 volatile dbus_int32_t val)
1858 register dbus_int32_t result;
1860 __asm__ __volatile__ ("lock; xaddl %0,%1"
1861 : "=r" (result), "=m" (atomic->value)
1862 : "0" (val), "m" (atomic->value));
1868 * Atomically increments an integer
1870 * @param atomic pointer to the integer to increment
1871 * @returns the value before incrementing
1873 * @todo implement arch-specific faster atomic ops
1876 _dbus_atomic_inc (DBusAtomic *atomic)
1878 #ifdef DBUS_USE_ATOMIC_INT_486
1879 return atomic_exchange_and_add (atomic, 1);
1882 _DBUS_LOCK (atomic);
1883 res = atomic->value;
1885 _DBUS_UNLOCK (atomic);
1891 * Atomically decrement an integer
1893 * @param atomic pointer to the integer to decrement
1894 * @returns the value before decrementing
1896 * @todo implement arch-specific faster atomic ops
1899 _dbus_atomic_dec (DBusAtomic *atomic)
1901 #ifdef DBUS_USE_ATOMIC_INT_486
1902 return atomic_exchange_and_add (atomic, -1);
1906 _DBUS_LOCK (atomic);
1907 res = atomic->value;
1909 _DBUS_UNLOCK (atomic);
1915 * Wrapper for poll().
1917 * @param fds the file descriptors to poll
1918 * @param n_fds number of descriptors in the array
1919 * @param timeout_milliseconds timeout or -1 for infinite
1920 * @returns numbers of fds with revents, or <0 on error
1923 _dbus_poll (DBusPollFD *fds,
1925 int timeout_milliseconds)
1928 /* This big thing is a constant expression and should get optimized
1929 * out of existence. So it's more robust than a configure check at
1932 if (_DBUS_POLLIN == POLLIN &&
1933 _DBUS_POLLPRI == POLLPRI &&
1934 _DBUS_POLLOUT == POLLOUT &&
1935 _DBUS_POLLERR == POLLERR &&
1936 _DBUS_POLLHUP == POLLHUP &&
1937 _DBUS_POLLNVAL == POLLNVAL &&
1938 sizeof (DBusPollFD) == sizeof (struct pollfd) &&
1939 _DBUS_STRUCT_OFFSET (DBusPollFD, fd) ==
1940 _DBUS_STRUCT_OFFSET (struct pollfd, fd) &&
1941 _DBUS_STRUCT_OFFSET (DBusPollFD, events) ==
1942 _DBUS_STRUCT_OFFSET (struct pollfd, events) &&
1943 _DBUS_STRUCT_OFFSET (DBusPollFD, revents) ==
1944 _DBUS_STRUCT_OFFSET (struct pollfd, revents))
1946 return poll ((struct pollfd*) fds,
1948 timeout_milliseconds);
1952 /* We have to convert the DBusPollFD to an array of
1953 * struct pollfd, poll, and convert back.
1955 _dbus_warn ("didn't implement poll() properly for this system yet\n");
1958 #else /* ! HAVE_POLL */
1960 fd_set read_set, write_set, err_set;
1966 FD_ZERO (&read_set);
1967 FD_ZERO (&write_set);
1970 for (i = 0; i < n_fds; i++)
1972 DBusPollFD f = fds[i];
1974 if (f.events & _DBUS_POLLIN)
1975 FD_SET (f.fd, &read_set);
1977 if (f.events & _DBUS_POLLOUT)
1978 FD_SET (f.fd, &write_set);
1980 FD_SET (f.fd, &err_set);
1982 max_fd = MAX (max_fd, f.fd);
1985 tv.tv_sec = timeout_milliseconds / 1000;
1986 tv.tv_usec = (timeout_milliseconds % 1000) * 1000;
1988 ready = select (max_fd + 1, &read_set, &write_set, &err_set, &tv);
1992 for (i = 0; i < n_fds; i++)
1994 DBusPollFD f = fds[i];
1998 if (FD_ISSET (f.fd, &read_set))
1999 f.revents |= _DBUS_POLLIN;
2001 if (FD_ISSET (f.fd, &write_set))
2002 f.revents |= _DBUS_POLLOUT;
2004 if (FD_ISSET (f.fd, &err_set))
2005 f.revents |= _DBUS_POLLERR;
2013 /** nanoseconds in a second */
2014 #define NANOSECONDS_PER_SECOND 1000000000
2015 /** microseconds in a second */
2016 #define MICROSECONDS_PER_SECOND 1000000
2017 /** milliseconds in a second */
2018 #define MILLISECONDS_PER_SECOND 1000
2019 /** nanoseconds in a millisecond */
2020 #define NANOSECONDS_PER_MILLISECOND 1000000
2021 /** microseconds in a millisecond */
2022 #define MICROSECONDS_PER_MILLISECOND 1000
2025 * Sleeps the given number of milliseconds.
2026 * @param milliseconds number of milliseconds
2029 _dbus_sleep_milliseconds (int milliseconds)
2031 #ifdef HAVE_NANOSLEEP
2032 struct timespec req;
2033 struct timespec rem;
2035 req.tv_sec = milliseconds / MILLISECONDS_PER_SECOND;
2036 req.tv_nsec = (milliseconds % MILLISECONDS_PER_SECOND) * NANOSECONDS_PER_MILLISECOND;
2040 while (nanosleep (&req, &rem) < 0 && errno == EINTR)
2042 #elif defined (HAVE_USLEEP)
2043 usleep (milliseconds * MICROSECONDS_PER_MILLISECOND);
2044 #else /* ! HAVE_USLEEP */
2045 sleep (MAX (milliseconds / 1000, 1));
2050 * Get current time, as in gettimeofday().
2052 * @param tv_sec return location for number of seconds
2053 * @param tv_usec return location for number of microseconds (thousandths)
2056 _dbus_get_current_time (long *tv_sec,
2061 gettimeofday (&t, NULL);
2066 *tv_usec = t.tv_usec;
2070 * Appends the contents of the given file to the string,
2071 * returning error code. At the moment, won't open a file
2072 * more than a megabyte in size.
2074 * @param str the string to append to
2075 * @param filename filename to load
2076 * @param error place to set an error
2077 * @returns #FALSE if error was set
2080 _dbus_file_get_contents (DBusString *str,
2081 const DBusString *filename,
2088 const char *filename_c;
2090 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2092 filename_c = _dbus_string_get_const_data (filename);
2094 /* O_BINARY useful on Cygwin */
2095 fd = open (filename_c, O_RDONLY | O_BINARY);
2098 dbus_set_error (error, _dbus_error_from_errno (errno),
2099 "Failed to open \"%s\": %s",
2101 _dbus_strerror (errno));
2105 if (fstat (fd, &sb) < 0)
2107 dbus_set_error (error, _dbus_error_from_errno (errno),
2108 "Failed to stat \"%s\": %s",
2110 _dbus_strerror (errno));
2112 _dbus_verbose ("fstat() failed: %s",
2113 _dbus_strerror (errno));
2120 if (sb.st_size > _DBUS_ONE_MEGABYTE)
2122 dbus_set_error (error, DBUS_ERROR_FAILED,
2123 "File size %lu of \"%s\" is too large.",
2124 (unsigned long) sb.st_size, filename_c);
2130 orig_len = _dbus_string_get_length (str);
2131 if (sb.st_size > 0 && S_ISREG (sb.st_mode))
2135 while (total < (int) sb.st_size)
2137 bytes_read = _dbus_read (fd, str,
2138 sb.st_size - total);
2139 if (bytes_read <= 0)
2141 dbus_set_error (error, _dbus_error_from_errno (errno),
2142 "Error reading \"%s\": %s",
2144 _dbus_strerror (errno));
2146 _dbus_verbose ("read() failed: %s",
2147 _dbus_strerror (errno));
2150 _dbus_string_set_length (str, orig_len);
2154 total += bytes_read;
2160 else if (sb.st_size != 0)
2162 _dbus_verbose ("Can only open regular files at the moment.\n");
2163 dbus_set_error (error, DBUS_ERROR_FAILED,
2164 "\"%s\" is not a regular file",
2177 * Writes a string out to a file. If the file exists,
2178 * it will be atomically overwritten by the new data.
2180 * @param str the string to write out
2181 * @param filename the file to save string to
2182 * @param error error to be filled in on failure
2183 * @returns #FALSE on failure
2186 _dbus_string_save_to_file (const DBusString *str,
2187 const DBusString *filename,
2192 const char *filename_c;
2193 DBusString tmp_filename;
2194 const char *tmp_filename_c;
2196 dbus_bool_t need_unlink;
2199 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2203 need_unlink = FALSE;
2205 if (!_dbus_string_init (&tmp_filename))
2207 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
2211 if (!_dbus_string_copy (filename, 0, &tmp_filename, 0))
2213 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
2214 _dbus_string_free (&tmp_filename);
2218 if (!_dbus_string_append (&tmp_filename, "."))
2220 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
2221 _dbus_string_free (&tmp_filename);
2225 #define N_TMP_FILENAME_RANDOM_BYTES 8
2226 if (!_dbus_generate_random_ascii (&tmp_filename, N_TMP_FILENAME_RANDOM_BYTES))
2228 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
2229 _dbus_string_free (&tmp_filename);
2233 filename_c = _dbus_string_get_const_data (filename);
2234 tmp_filename_c = _dbus_string_get_const_data (&tmp_filename);
2236 fd = open (tmp_filename_c, O_WRONLY | O_BINARY | O_EXCL | O_CREAT,
2240 dbus_set_error (error, _dbus_error_from_errno (errno),
2241 "Could not create %s: %s", tmp_filename_c,
2242 _dbus_strerror (errno));
2249 bytes_to_write = _dbus_string_get_length (str);
2251 while (total < bytes_to_write)
2255 bytes_written = _dbus_write (fd, str, total,
2256 bytes_to_write - total);
2258 if (bytes_written <= 0)
2260 dbus_set_error (error, _dbus_error_from_errno (errno),
2261 "Could not write to %s: %s", tmp_filename_c,
2262 _dbus_strerror (errno));
2267 total += bytes_written;
2272 dbus_set_error (error, _dbus_error_from_errno (errno),
2273 "Could not close file %s: %s",
2274 tmp_filename_c, _dbus_strerror (errno));
2281 if (rename (tmp_filename_c, filename_c) < 0)
2283 dbus_set_error (error, _dbus_error_from_errno (errno),
2284 "Could not rename %s to %s: %s",
2285 tmp_filename_c, filename_c,
2286 _dbus_strerror (errno));
2291 need_unlink = FALSE;
2296 /* close first, then unlink, to prevent ".nfs34234235" garbage
2303 if (need_unlink && unlink (tmp_filename_c) < 0)
2304 _dbus_verbose ("Failed to unlink temp file %s: %s\n",
2305 tmp_filename_c, _dbus_strerror (errno));
2307 _dbus_string_free (&tmp_filename);
2310 _DBUS_ASSERT_ERROR_IS_SET (error);
2315 /** Creates the given file, failing if the file already exists.
2317 * @param filename the filename
2318 * @param error error location
2319 * @returns #TRUE if we created the file and it didn't exist
2322 _dbus_create_file_exclusively (const DBusString *filename,
2326 const char *filename_c;
2328 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2330 filename_c = _dbus_string_get_const_data (filename);
2332 fd = open (filename_c, O_WRONLY | O_BINARY | O_EXCL | O_CREAT,
2336 dbus_set_error (error,
2338 "Could not create file %s: %s\n",
2340 _dbus_strerror (errno));
2346 dbus_set_error (error,
2348 "Could not close file %s: %s\n",
2350 _dbus_strerror (errno));
2358 * Deletes the given file.
2360 * @param filename the filename
2361 * @param error error location
2363 * @returns #TRUE if unlink() succeeded
2366 _dbus_delete_file (const DBusString *filename,
2369 const char *filename_c;
2371 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2373 filename_c = _dbus_string_get_const_data (filename);
2375 if (unlink (filename_c) < 0)
2377 dbus_set_error (error, DBUS_ERROR_FAILED,
2378 "Failed to delete file %s: %s\n",
2379 filename_c, _dbus_strerror (errno));
2387 * Creates a directory; succeeds if the directory
2388 * is created or already existed.
2390 * @param filename directory filename
2391 * @param error initialized error object
2392 * @returns #TRUE on success
2395 _dbus_create_directory (const DBusString *filename,
2398 const char *filename_c;
2400 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2402 filename_c = _dbus_string_get_const_data (filename);
2404 if (mkdir (filename_c, 0700) < 0)
2406 if (errno == EEXIST)
2409 dbus_set_error (error, DBUS_ERROR_FAILED,
2410 "Failed to create directory %s: %s\n",
2411 filename_c, _dbus_strerror (errno));
2419 * Removes a directory; Directory must be empty
2421 * @param filename directory filename
2422 * @param error initialized error object
2423 * @returns #TRUE on success
2426 _dbus_delete_directory (const DBusString *filename,
2429 const char *filename_c;
2431 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2433 filename_c = _dbus_string_get_const_data (filename);
2435 if (rmdir (filename_c) != 0)
2437 dbus_set_error (error, DBUS_ERROR_FAILED,
2438 "Failed to remove directory %s: %s\n",
2439 filename_c, _dbus_strerror (errno));
2447 * Appends the given filename to the given directory.
2449 * @todo it might be cute to collapse multiple '/' such as "foo//"
2452 * @param dir the directory name
2453 * @param next_component the filename
2454 * @returns #TRUE on success
2457 _dbus_concat_dir_and_file (DBusString *dir,
2458 const DBusString *next_component)
2460 dbus_bool_t dir_ends_in_slash;
2461 dbus_bool_t file_starts_with_slash;
2463 if (_dbus_string_get_length (dir) == 0 ||
2464 _dbus_string_get_length (next_component) == 0)
2467 dir_ends_in_slash = '/' == _dbus_string_get_byte (dir,
2468 _dbus_string_get_length (dir) - 1);
2470 file_starts_with_slash = '/' == _dbus_string_get_byte (next_component, 0);
2472 if (dir_ends_in_slash && file_starts_with_slash)
2474 _dbus_string_shorten (dir, 1);
2476 else if (!(dir_ends_in_slash || file_starts_with_slash))
2478 if (!_dbus_string_append_byte (dir, '/'))
2482 return _dbus_string_copy (next_component, 0, dir,
2483 _dbus_string_get_length (dir));
2487 * Get the directory name from a complete filename
2488 * @param filename the filename
2489 * @param dirname string to append directory name to
2490 * @returns #FALSE if no memory
2493 _dbus_string_get_dirname (const DBusString *filename,
2494 DBusString *dirname)
2498 _dbus_assert (filename != dirname);
2499 _dbus_assert (filename != NULL);
2500 _dbus_assert (dirname != NULL);
2502 /* Ignore any separators on the end */
2503 sep = _dbus_string_get_length (filename);
2505 return _dbus_string_append (dirname, "."); /* empty string passed in */
2507 while (sep > 0 && _dbus_string_get_byte (filename, sep - 1) == '/')
2510 _dbus_assert (sep >= 0);
2513 return _dbus_string_append (dirname, "/");
2515 /* Now find the previous separator */
2516 _dbus_string_find_byte_backward (filename, sep, '/', &sep);
2518 return _dbus_string_append (dirname, ".");
2520 /* skip multiple separators */
2521 while (sep > 0 && _dbus_string_get_byte (filename, sep - 1) == '/')
2524 _dbus_assert (sep >= 0);
2527 _dbus_string_get_byte (filename, 0) == '/')
2528 return _dbus_string_append (dirname, "/");
2530 return _dbus_string_copy_len (filename, 0, sep - 0,
2531 dirname, _dbus_string_get_length (dirname));
2535 * Checks whether the filename is an absolute path
2537 * @param filename the filename
2538 * @returns #TRUE if an absolute path
2541 _dbus_path_is_absolute (const DBusString *filename)
2543 if (_dbus_string_get_length (filename) > 0)
2544 return _dbus_string_get_byte (filename, 0) == '/';
2550 * Internals of directory iterator
2554 DIR *d; /**< The DIR* from opendir() */
2559 * Open a directory to iterate over.
2561 * @param filename the directory name
2562 * @param error exception return object or #NULL
2563 * @returns new iterator, or #NULL on error
2566 _dbus_directory_open (const DBusString *filename,
2571 const char *filename_c;
2573 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2575 filename_c = _dbus_string_get_const_data (filename);
2577 d = opendir (filename_c);
2580 dbus_set_error (error, _dbus_error_from_errno (errno),
2581 "Failed to read directory \"%s\": %s",
2583 _dbus_strerror (errno));
2586 iter = dbus_new0 (DBusDirIter, 1);
2590 dbus_set_error (error, DBUS_ERROR_NO_MEMORY,
2591 "Could not allocate memory for directory iterator");
2601 * Get next file in the directory. Will not return "." or ".." on
2602 * UNIX. If an error occurs, the contents of "filename" are
2603 * undefined. The error is never set if the function succeeds.
2605 * @todo for thread safety, I think we have to use
2606 * readdir_r(). (GLib has the same issue, should file a bug.)
2608 * @param iter the iterator
2609 * @param filename string to be set to the next file in the dir
2610 * @param error return location for error
2611 * @returns #TRUE if filename was filled in with a new filename
2614 _dbus_directory_get_next_file (DBusDirIter *iter,
2615 DBusString *filename,
2620 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2624 ent = readdir (iter->d);
2628 dbus_set_error (error,
2629 _dbus_error_from_errno (errno),
2630 "%s", _dbus_strerror (errno));
2633 else if (ent->d_name[0] == '.' &&
2634 (ent->d_name[1] == '\0' ||
2635 (ent->d_name[1] == '.' && ent->d_name[2] == '\0')))
2639 _dbus_string_set_length (filename, 0);
2640 if (!_dbus_string_append (filename, ent->d_name))
2642 dbus_set_error (error, DBUS_ERROR_NO_MEMORY,
2643 "No memory to read directory entry");
2652 * Closes a directory iteration.
2655 _dbus_directory_close (DBusDirIter *iter)
2662 pseudorandom_generate_random_bytes (DBusString *str,
2666 unsigned long tv_usec;
2669 old_len = _dbus_string_get_length (str);
2671 /* fall back to pseudorandom */
2672 _dbus_verbose ("Falling back to pseudorandom for %d bytes\n",
2675 _dbus_get_current_time (NULL, &tv_usec);
2685 b = (r / (double) RAND_MAX) * 255.0;
2687 if (!_dbus_string_append_byte (str, b))
2696 _dbus_string_set_length (str, old_len);
2701 * Generates the given number of random bytes,
2702 * using the best mechanism we can come up with.
2704 * @param str the string
2705 * @param n_bytes the number of random bytes to append to string
2706 * @returns #TRUE on success, #FALSE if no memory
2709 _dbus_generate_random_bytes (DBusString *str,
2715 /* FALSE return means "no memory", if it could
2716 * mean something else then we'd need to return
2717 * a DBusError. So we always fall back to pseudorandom
2721 old_len = _dbus_string_get_length (str);
2724 /* note, urandom on linux will fall back to pseudorandom */
2725 fd = open ("/dev/urandom", O_RDONLY);
2727 return pseudorandom_generate_random_bytes (str, n_bytes);
2729 if (_dbus_read (fd, str, n_bytes) != n_bytes)
2732 _dbus_string_set_length (str, old_len);
2733 return pseudorandom_generate_random_bytes (str, n_bytes);
2736 _dbus_verbose ("Read %d bytes from /dev/urandom\n",
2745 * Generates the given number of random bytes, where the bytes are
2746 * chosen from the alphanumeric ASCII subset.
2748 * @param str the string
2749 * @param n_bytes the number of random ASCII bytes to append to string
2750 * @returns #TRUE on success, #FALSE if no memory or other failure
2753 _dbus_generate_random_ascii (DBusString *str,
2756 static const char letters[] =
2757 "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz";
2761 if (!_dbus_generate_random_bytes (str, n_bytes))
2764 len = _dbus_string_get_length (str);
2768 _dbus_string_set_byte (str, i,
2769 letters[_dbus_string_get_byte (str, i) %
2770 (sizeof (letters) - 1)]);
2775 _dbus_assert (_dbus_string_validate_ascii (str, len - n_bytes,
2782 * A wrapper around strerror() because some platforms
2783 * may be lame and not have strerror().
2785 * @param error_number errno.
2786 * @returns error description.
2789 _dbus_strerror (int error_number)
2793 msg = strerror (error_number);
2801 * signal (SIGPIPE, SIG_IGN);
2804 _dbus_disable_sigpipe (void)
2806 signal (SIGPIPE, SIG_IGN);
2810 * Sets the file descriptor to be close
2811 * on exec. Should be called for all file
2812 * descriptors in D-BUS code.
2814 * @param fd the file descriptor
2817 _dbus_fd_set_close_on_exec (int fd)
2821 val = fcntl (fd, F_GETFD, 0);
2828 fcntl (fd, F_SETFD, val);
2832 * Converts a UNIX errno into a #DBusError name.
2834 * @todo should cover more errnos, specifically those
2837 * @param error_number the errno.
2838 * @returns an error name
2841 _dbus_error_from_errno (int error_number)
2843 switch (error_number)
2846 return DBUS_ERROR_FAILED;
2848 #ifdef EPROTONOSUPPORT
2849 case EPROTONOSUPPORT:
2850 return DBUS_ERROR_NOT_SUPPORTED;
2854 return DBUS_ERROR_NOT_SUPPORTED;
2858 return DBUS_ERROR_LIMITS_EXCEEDED; /* kernel out of memory */
2862 return DBUS_ERROR_LIMITS_EXCEEDED;
2866 return DBUS_ERROR_ACCESS_DENIED;
2870 return DBUS_ERROR_ACCESS_DENIED;
2874 return DBUS_ERROR_NO_MEMORY;
2878 return DBUS_ERROR_NO_MEMORY;
2882 return DBUS_ERROR_FAILED;
2886 return DBUS_ERROR_FAILED;
2890 return DBUS_ERROR_FAILED;
2894 return DBUS_ERROR_FAILED;
2898 return DBUS_ERROR_FAILED;
2902 return DBUS_ERROR_NO_SERVER;
2906 return DBUS_ERROR_TIMEOUT;
2910 return DBUS_ERROR_NO_NETWORK;
2914 return DBUS_ERROR_ADDRESS_IN_USE;
2918 return DBUS_ERROR_FILE_NOT_FOUND;
2922 return DBUS_ERROR_FILE_NOT_FOUND;
2926 return DBUS_ERROR_FAILED;
2930 * Exit the process, returning the given value.
2932 * @param code the exit code
2935 _dbus_exit (int code)
2943 * @param filename the filename to stat
2944 * @param statbuf the stat info to fill in
2945 * @param error return location for error
2946 * @returns #FALSE if error was set
2949 _dbus_stat (const DBusString *filename,
2953 const char *filename_c;
2956 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
2958 filename_c = _dbus_string_get_const_data (filename);
2960 if (stat (filename_c, &sb) < 0)
2962 dbus_set_error (error, _dbus_error_from_errno (errno),
2963 "%s", _dbus_strerror (errno));
2967 statbuf->mode = sb.st_mode;
2968 statbuf->nlink = sb.st_nlink;
2969 statbuf->uid = sb.st_uid;
2970 statbuf->gid = sb.st_gid;
2971 statbuf->size = sb.st_size;
2972 statbuf->atime = sb.st_atime;
2973 statbuf->mtime = sb.st_mtime;
2974 statbuf->ctime = sb.st_ctime;
2980 * Creates a full-duplex pipe (as in socketpair()).
2981 * Sets both ends of the pipe nonblocking.
2983 * @param fd1 return location for one end
2984 * @param fd2 return location for the other end
2985 * @param blocking #TRUE if pipe should be blocking
2986 * @param error error return
2987 * @returns #FALSE on failure (if error is set)
2990 _dbus_full_duplex_pipe (int *fd1,
2992 dbus_bool_t blocking,
2995 #ifdef HAVE_SOCKETPAIR
2998 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3000 if (socketpair (AF_UNIX, SOCK_STREAM, 0, fds) < 0)
3002 dbus_set_error (error, _dbus_error_from_errno (errno),
3003 "Could not create full-duplex pipe");
3008 (!_dbus_set_fd_nonblocking (fds[0], NULL) ||
3009 !_dbus_set_fd_nonblocking (fds[1], NULL)))
3011 dbus_set_error (error, _dbus_error_from_errno (errno),
3012 "Could not set full-duplex pipe nonblocking");
3023 _dbus_verbose ("full-duplex pipe %d <-> %d\n",
3028 _dbus_warn ("_dbus_full_duplex_pipe() not implemented on this OS\n");
3029 dbus_set_error (error, DBUS_ERROR_FAILED,
3030 "_dbus_full_duplex_pipe() not implemented on this OS");
3036 * Closes a file descriptor.
3038 * @param fd the file descriptor
3039 * @param error error object
3040 * @returns #FALSE if error set
3043 _dbus_close (int fd,
3046 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3054 dbus_set_error (error, _dbus_error_from_errno (errno),
3055 "Could not close fd %d", fd);
3063 * Sets a file descriptor to be nonblocking.
3065 * @param fd the file descriptor.
3066 * @param error address of error location.
3067 * @returns #TRUE on success.
3070 _dbus_set_fd_nonblocking (int fd,
3075 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
3077 val = fcntl (fd, F_GETFL, 0);
3080 dbus_set_error (error, _dbus_error_from_errno (errno),
3081 "Failed to get flags from file descriptor %d: %s",
3082 fd, _dbus_strerror (errno));
3083 _dbus_verbose ("Failed to get flags for fd %d: %s\n", fd,
3084 _dbus_strerror (errno));
3088 if (fcntl (fd, F_SETFL, val | O_NONBLOCK) < 0)
3090 dbus_set_error (error, _dbus_error_from_errno (errno),
3091 "Failed to set nonblocking flag of file descriptor %d: %s",
3092 fd, _dbus_strerror (errno));
3093 _dbus_verbose ("Failed to set fd %d nonblocking: %s\n",
3094 fd, _dbus_strerror (errno));
3103 * On GNU libc systems, print a crude backtrace to the verbose log.
3104 * On other systems, print "no backtrace support"
3108 _dbus_print_backtrace (void)
3110 #if defined (HAVE_BACKTRACE) && defined (DBUS_ENABLE_VERBOSE_MODE)
3116 bt_size = backtrace (bt, 500);
3118 syms = backtrace_symbols (bt, bt_size);
3123 _dbus_verbose (" %s\n", syms[i]);
3129 _dbus_verbose (" D-BUS not compiled with backtrace support\n");
3134 * Does the chdir, fork, setsid, etc. to become a daemon process.
3136 * @param pidfile #NULL, or pidfile to create
3137 * @param print_pid_fd file descriptor to print pid to, or -1 for none
3138 * @param error return location for errors
3139 * @returns #FALSE on failure
3142 _dbus_become_daemon (const DBusString *pidfile,
3150 _dbus_verbose ("Becoming a daemon...\n");
3152 _dbus_verbose ("chdir to /\n");
3153 if (chdir ("/") < 0)
3155 dbus_set_error (error, DBUS_ERROR_FAILED,
3156 "Could not chdir() to root directory");
3160 _dbus_verbose ("forking...\n");
3161 switch ((child_pid = fork ()))
3164 _dbus_verbose ("fork failed\n");
3165 dbus_set_error (error, _dbus_error_from_errno (errno),
3166 "Failed to fork daemon: %s", _dbus_strerror (errno));
3171 _dbus_verbose ("in child, closing std file descriptors\n");
3173 /* silently ignore failures here, if someone
3174 * doesn't have /dev/null we may as well try
3175 * to continue anyhow
3178 dev_null_fd = open ("/dev/null", O_RDWR);
3179 if (dev_null_fd >= 0)
3181 dup2 (dev_null_fd, 0);
3182 dup2 (dev_null_fd, 1);
3184 s = _dbus_getenv ("DBUS_DEBUG_OUTPUT");
3185 if (s == NULL || *s == '\0')
3186 dup2 (dev_null_fd, 2);
3188 _dbus_verbose ("keeping stderr open due to DBUS_DEBUG_OUTPUT\n");
3191 /* Get a predictable umask */
3192 _dbus_verbose ("setting umask\n");
3199 _dbus_verbose ("parent writing pid file\n");
3200 if (!_dbus_write_pid_file (pidfile,
3204 _dbus_verbose ("pid file write failed, killing child\n");
3205 kill (child_pid, SIGTERM);
3210 /* Write PID if requested */
3211 if (print_pid_fd >= 0)
3216 if (!_dbus_string_init (&pid))
3218 _DBUS_SET_OOM (error);
3219 kill (child_pid, SIGTERM);
3223 if (!_dbus_string_append_int (&pid, _dbus_getpid ()) ||
3224 !_dbus_string_append (&pid, "\n"))
3226 _dbus_string_free (&pid);
3227 _DBUS_SET_OOM (error);
3228 kill (child_pid, SIGTERM);
3232 bytes = _dbus_string_get_length (&pid);
3233 if (_dbus_write (print_pid_fd, &pid, 0, bytes) != bytes)
3235 dbus_set_error (error, DBUS_ERROR_FAILED,
3236 "Printing message bus PID: %s\n",
3237 _dbus_strerror (errno));
3238 _dbus_string_free (&pid);
3239 kill (child_pid, SIGTERM);
3243 _dbus_string_free (&pid);
3245 _dbus_verbose ("parent exiting\n");
3250 _dbus_verbose ("calling setsid()\n");
3251 if (setsid () == -1)
3252 _dbus_assert_not_reached ("setsid() failed");
3258 * Creates a file containing the process ID.
3260 * @param filename the filename to write to
3261 * @param pid our process ID
3262 * @param error return location for errors
3263 * @returns #FALSE on failure
3266 _dbus_write_pid_file (const DBusString *filename,
3270 const char *cfilename;
3274 cfilename = _dbus_string_get_const_data (filename);
3276 fd = open (cfilename, O_WRONLY|O_CREAT|O_EXCL|O_BINARY, 0644);
3280 dbus_set_error (error, _dbus_error_from_errno (errno),
3281 "Failed to open \"%s\": %s", cfilename,
3282 _dbus_strerror (errno));
3286 if ((f = fdopen (fd, "w")) == NULL)
3288 dbus_set_error (error, _dbus_error_from_errno (errno),
3289 "Failed to fdopen fd %d: %s", fd, _dbus_strerror (errno));
3294 if (fprintf (f, "%lu\n", pid) < 0)
3296 dbus_set_error (error, _dbus_error_from_errno (errno),
3297 "Failed to write to \"%s\": %s", cfilename,
3298 _dbus_strerror (errno));
3302 if (fclose (f) == EOF)
3304 dbus_set_error (error, _dbus_error_from_errno (errno),
3305 "Failed to close \"%s\": %s", cfilename,
3306 _dbus_strerror (errno));
3314 * Changes the user and group the bus is running as.
3316 * @param uid the new user ID
3317 * @param gid the new group ID
3318 * @param error return location for errors
3319 * @returns #FALSE on failure
3322 _dbus_change_identity (dbus_uid_t uid,
3326 /* setgroups() only works if we are a privileged process,
3327 * so we don't return error on failure; the only possible
3328 * failure is that we don't have perms to do it.
3329 * FIXME not sure this is right, maybe if setuid()
3330 * is going to work then setgroups() should also work.
3332 if (setgroups (0, NULL) < 0)
3333 _dbus_warn ("Failed to drop supplementary groups: %s\n",
3334 _dbus_strerror (errno));
3336 /* Set GID first, or the setuid may remove our permission
3339 if (setgid (gid) < 0)
3341 dbus_set_error (error, _dbus_error_from_errno (errno),
3342 "Failed to set GID to %lu: %s", gid,
3343 _dbus_strerror (errno));
3347 if (setuid (uid) < 0)
3349 dbus_set_error (error, _dbus_error_from_errno (errno),
3350 "Failed to set UID to %lu: %s", uid,
3351 _dbus_strerror (errno));
3358 /** Installs a UNIX signal handler
3360 * @param sig the signal to handle
3361 * @param handler the handler
3364 _dbus_set_signal_handler (int sig,
3365 DBusSignalHandler handler)
3367 struct sigaction act;
3368 sigset_t empty_mask;
3370 sigemptyset (&empty_mask);
3371 act.sa_handler = handler;
3372 act.sa_mask = empty_mask;
3374 sigaction (sig, &act, 0);
3377 /** Checks if a file exists
3379 * @param file full path to the file
3380 * @returns #TRUE if file exists
3383 _dbus_file_exists (const char *file)
3385 return (access (file, F_OK) == 0);
3388 /** Checks if user is at the console
3390 * @param username user to check
3391 * @param error return location for errors
3392 * @returns #TRUE is the user is at the consolei and there are no errors
3395 _dbus_user_at_console (const char *username,
3403 if (!_dbus_string_init (&f))
3405 _DBUS_SET_OOM (error);
3409 if (!_dbus_string_append (&f, DBUS_CONSOLE_DIR))
3411 _DBUS_SET_OOM (error);
3416 if (!_dbus_string_append (&f, username))
3418 _DBUS_SET_OOM (error);
3422 result = _dbus_file_exists (_dbus_string_get_const_data (&f));
3425 _dbus_string_free (&f);
3430 #ifdef DBUS_BUILD_TESTS
3433 check_dirname (const char *filename,
3434 const char *dirname)
3438 _dbus_string_init_const (&f, filename);
3440 if (!_dbus_string_init (&d))
3441 _dbus_assert_not_reached ("no memory");
3443 if (!_dbus_string_get_dirname (&f, &d))
3444 _dbus_assert_not_reached ("no memory");
3446 if (!_dbus_string_equal_c_str (&d, dirname))
3448 _dbus_warn ("For filename \"%s\" got dirname \"%s\" and expected \"%s\"\n",
3450 _dbus_string_get_const_data (&d),
3455 _dbus_string_free (&d);
3459 check_path_absolute (const char *path,
3460 dbus_bool_t expected)
3464 _dbus_string_init_const (&p, path);
3466 if (_dbus_path_is_absolute (&p) != expected)
3468 _dbus_warn ("For path \"%s\" expected absolute = %d got %d\n",
3469 path, expected, _dbus_path_is_absolute (&p));
3475 * Unit test for dbus-sysdeps.c.
3477 * @returns #TRUE on success.
3480 _dbus_sysdeps_test (void)
3486 check_dirname ("foo", ".");
3487 check_dirname ("foo/bar", "foo");
3488 check_dirname ("foo//bar", "foo");
3489 check_dirname ("foo///bar", "foo");
3490 check_dirname ("foo/bar/", "foo");
3491 check_dirname ("foo//bar/", "foo");
3492 check_dirname ("foo///bar/", "foo");
3493 check_dirname ("foo/bar//", "foo");
3494 check_dirname ("foo//bar////", "foo");
3495 check_dirname ("foo///bar///////", "foo");
3496 check_dirname ("/foo", "/");
3497 check_dirname ("////foo", "/");
3498 check_dirname ("/foo/bar", "/foo");
3499 check_dirname ("/foo//bar", "/foo");
3500 check_dirname ("/foo///bar", "/foo");
3501 check_dirname ("/", "/");
3502 check_dirname ("///", "/");
3503 check_dirname ("", ".");
3506 _dbus_string_init_const (&str, "3.5");
3507 if (!_dbus_string_parse_double (&str,
3510 _dbus_warn ("Failed to parse double");
3513 if (ABS(3.5 - val) > 1e-6)
3515 _dbus_warn ("Failed to parse 3.5 correctly, got: %f", val);
3520 _dbus_warn ("_dbus_string_parse_double of \"3.5\" returned wrong position %d", pos);
3524 _dbus_string_init_const (&str, "0xff");
3525 if (!_dbus_string_parse_double (&str,
3528 _dbus_warn ("Failed to parse double");
3531 if (ABS (0xff - val) > 1e-6)
3533 _dbus_warn ("Failed to parse 0xff correctly, got: %f\n", val);
3538 _dbus_warn ("_dbus_string_parse_double of \"0xff\" returned wrong position %d", pos);
3542 check_path_absolute ("/", TRUE);
3543 check_path_absolute ("/foo", TRUE);
3544 check_path_absolute ("", FALSE);
3545 check_path_absolute ("foo", FALSE);
3546 check_path_absolute ("foo/bar", FALSE);
3550 #endif /* DBUS_BUILD_TESTS */
3552 /** @} end of sysdeps */