1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-sysdeps-util-unix.c Would be in dbus-sysdeps-unix.c, but not used in libdbus
4 * Copyright (C) 2002, 2003, 2004, 2005 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
26 #include "dbus-sysdeps.h"
27 #include "dbus-sysdeps-unix.h"
28 #include "dbus-internals.h"
29 #include "dbus-pipe.h"
30 #include "dbus-protocol.h"
31 #include "dbus-string.h"
32 #define DBUS_USERDB_INCLUDES_PRIVATE 1
33 #include "dbus-userdb.h"
34 #include "dbus-test.h"
36 #include <sys/types.h>
45 #ifdef HAVE_SYS_RESOURCE_H
46 #include <sys/resource.h>
49 #include <sys/socket.h>
57 #ifdef HAVE_SYS_SYSLIMITS_H
58 #include <sys/syslimits.h>
61 #include "sd-daemon.h"
68 * @addtogroup DBusInternalsUtils
74 * Does the chdir, fork, setsid, etc. to become a daemon process.
76 * @param pidfile #NULL, or pidfile to create
77 * @param print_pid_pipe pipe to print daemon's pid to, or -1 for none
78 * @param error return location for errors
79 * @param keep_umask #TRUE to keep the original umask
80 * @returns #FALSE on failure
83 _dbus_become_daemon (const DBusString *pidfile,
84 DBusPipe *print_pid_pipe,
86 dbus_bool_t keep_umask)
92 _dbus_verbose ("Becoming a daemon...\n");
94 _dbus_verbose ("chdir to /\n");
97 dbus_set_error (error, DBUS_ERROR_FAILED,
98 "Could not chdir() to root directory");
102 _dbus_verbose ("forking...\n");
103 switch ((child_pid = fork ()))
106 _dbus_verbose ("fork failed\n");
107 dbus_set_error (error, _dbus_error_from_errno (errno),
108 "Failed to fork daemon: %s", _dbus_strerror (errno));
113 _dbus_verbose ("in child, closing std file descriptors\n");
115 /* silently ignore failures here, if someone
116 * doesn't have /dev/null we may as well try
120 dev_null_fd = open ("/dev/null", O_RDWR);
121 if (dev_null_fd >= 0)
123 dup2 (dev_null_fd, 0);
124 dup2 (dev_null_fd, 1);
126 s = _dbus_getenv ("DBUS_DEBUG_OUTPUT");
127 if (s == NULL || *s == '\0')
128 dup2 (dev_null_fd, 2);
130 _dbus_verbose ("keeping stderr open due to DBUS_DEBUG_OUTPUT\n");
136 /* Get a predictable umask */
137 _dbus_verbose ("setting umask\n");
141 _dbus_verbose ("calling setsid()\n");
143 _dbus_assert_not_reached ("setsid() failed");
148 if (!_dbus_write_pid_to_file_and_pipe (pidfile, print_pid_pipe,
151 _dbus_verbose ("pid file or pipe write failed: %s\n",
153 kill (child_pid, SIGTERM);
157 _dbus_verbose ("parent exiting\n");
167 * Creates a file containing the process ID.
169 * @param filename the filename to write to
170 * @param pid our process ID
171 * @param error return location for errors
172 * @returns #FALSE on failure
175 _dbus_write_pid_file (const DBusString *filename,
179 const char *cfilename;
183 cfilename = _dbus_string_get_const_data (filename);
185 fd = open (cfilename, O_WRONLY|O_CREAT|O_EXCL|O_BINARY, 0644);
189 dbus_set_error (error, _dbus_error_from_errno (errno),
190 "Failed to open \"%s\": %s", cfilename,
191 _dbus_strerror (errno));
195 if ((f = fdopen (fd, "w")) == NULL)
197 dbus_set_error (error, _dbus_error_from_errno (errno),
198 "Failed to fdopen fd %d: %s", fd, _dbus_strerror (errno));
199 _dbus_close (fd, NULL);
203 if (fprintf (f, "%lu\n", pid) < 0)
205 dbus_set_error (error, _dbus_error_from_errno (errno),
206 "Failed to write to \"%s\": %s", cfilename,
207 _dbus_strerror (errno));
213 if (fclose (f) == EOF)
215 dbus_set_error (error, _dbus_error_from_errno (errno),
216 "Failed to close \"%s\": %s", cfilename,
217 _dbus_strerror (errno));
225 * Writes the given pid_to_write to a pidfile (if non-NULL) and/or to a
226 * pipe (if non-NULL). Does nothing if pidfile and print_pid_pipe are both
229 * @param pidfile the file to write to or #NULL
230 * @param print_pid_pipe the pipe to write to or #NULL
231 * @param pid_to_write the pid to write out
232 * @param error error on failure
233 * @returns FALSE if error is set
236 _dbus_write_pid_to_file_and_pipe (const DBusString *pidfile,
237 DBusPipe *print_pid_pipe,
238 dbus_pid_t pid_to_write,
243 _dbus_verbose ("writing pid file %s\n", _dbus_string_get_const_data (pidfile));
244 if (!_dbus_write_pid_file (pidfile,
248 _dbus_verbose ("pid file write failed\n");
249 _DBUS_ASSERT_ERROR_IS_SET(error);
255 _dbus_verbose ("No pid file requested\n");
258 if (print_pid_pipe != NULL && _dbus_pipe_is_valid (print_pid_pipe))
263 _dbus_verbose ("writing our pid to pipe %d\n",
266 if (!_dbus_string_init (&pid))
268 _DBUS_SET_OOM (error);
272 if (!_dbus_string_append_int (&pid, pid_to_write) ||
273 !_dbus_string_append (&pid, "\n"))
275 _dbus_string_free (&pid);
276 _DBUS_SET_OOM (error);
280 bytes = _dbus_string_get_length (&pid);
281 if (_dbus_pipe_write (print_pid_pipe, &pid, 0, bytes, error) != bytes)
283 /* _dbus_pipe_write sets error only on failure, not short write */
284 if (error != NULL && !dbus_error_is_set(error))
286 dbus_set_error (error, DBUS_ERROR_FAILED,
287 "Printing message bus PID: did not write enough bytes\n");
289 _dbus_string_free (&pid);
293 _dbus_string_free (&pid);
297 _dbus_verbose ("No pid pipe to write to\n");
304 * Verify that after the fork we can successfully change to this user.
306 * @param user the username given in the daemon configuration
307 * @returns #TRUE if username is valid
310 _dbus_verify_daemon_user (const char *user)
314 _dbus_string_init_const (&u, user);
316 return _dbus_get_user_id_and_primary_group (&u, NULL, NULL);
320 /* The HAVE_LIBAUDIT case lives in selinux.c */
321 #ifndef HAVE_LIBAUDIT
323 * Changes the user and group the bus is running as.
325 * @param user the user to become
326 * @param error return location for errors
327 * @returns #FALSE on failure
330 _dbus_change_to_daemon_user (const char *user,
337 _dbus_string_init_const (&u, user);
339 if (!_dbus_get_user_id_and_primary_group (&u, &uid, &gid))
341 dbus_set_error (error, DBUS_ERROR_FAILED,
342 "User '%s' does not appear to exist?",
347 /* setgroups() only works if we are a privileged process,
348 * so we don't return error on failure; the only possible
349 * failure is that we don't have perms to do it.
351 * not sure this is right, maybe if setuid()
352 * is going to work then setgroups() should also work.
354 if (setgroups (0, NULL) < 0)
355 _dbus_warn ("Failed to drop supplementary groups: %s\n",
356 _dbus_strerror (errno));
358 /* Set GID first, or the setuid may remove our permission
361 if (setgid (gid) < 0)
363 dbus_set_error (error, _dbus_error_from_errno (errno),
364 "Failed to set GID to %lu: %s", gid,
365 _dbus_strerror (errno));
369 if (setuid (uid) < 0)
371 dbus_set_error (error, _dbus_error_from_errno (errno),
372 "Failed to set UID to %lu: %s", uid,
373 _dbus_strerror (errno));
379 #endif /* !HAVE_LIBAUDIT */
383 * Attempt to ensure that the current process can open
384 * at least @p limit file descriptors.
386 * If @p limit is lower than the current, it will not be
387 * lowered. No error is returned if the request can
390 * @param limit number of file descriptors
393 _dbus_request_file_descriptor_limit (unsigned int limit)
395 #ifdef HAVE_SETRLIMIT
397 struct rlimit target_lim;
399 /* No point to doing this practically speaking
400 * if we're not uid 0. We expect the system
401 * bus to use this before we change UID, and
402 * the session bus takes the Linux default
403 * of 1024 for both cur and max.
408 if (getrlimit (RLIMIT_NOFILE, &lim) < 0)
411 if (lim.rlim_cur >= limit)
414 /* Ignore "maximum limit", assume we have the "superuser"
415 * privileges. On Linux this is CAP_SYS_RESOURCE.
417 target_lim.rlim_cur = target_lim.rlim_max = limit;
418 /* Also ignore errors; if we fail, we will at least work
419 * up to whatever limit we had, which seems better than
420 * just outright aborting.
422 * However, in the future we should probably log this so OS builders
423 * have a chance to notice any misconfiguration like dbus-daemon
424 * being started without CAP_SYS_RESOURCE.
426 setrlimit (RLIMIT_NOFILE, &target_lim);
431 _dbus_init_system_log (dbus_bool_t is_daemon)
434 int logopts = LOG_PID;
436 #if HAVE_DECL_LOG_PERROR
438 if (!is_daemon || sd_booted () <= 0)
440 logopts |= LOG_PERROR;
443 openlog ("dbus", logopts, LOG_DAEMON);
448 * Log a message to the system log file (e.g. syslog on Unix).
450 * @param severity a severity value
451 * @param msg a printf-style format string
454 _dbus_system_log (DBusSystemLogSeverity severity, const char *msg, ...)
458 va_start (args, msg);
460 _dbus_system_logv (severity, msg, args);
466 * Log a message to the system log file (e.g. syslog on Unix).
468 * @param severity a severity value
469 * @param msg a printf-style format string
470 * @param args arguments for the format string
472 * If the FATAL severity is given, this function will terminate the program
473 * with an error code.
476 _dbus_system_logv (DBusSystemLogSeverity severity, const char *msg, va_list args)
483 case DBUS_SYSTEM_LOG_INFO:
484 flags = LOG_DAEMON | LOG_NOTICE;
486 case DBUS_SYSTEM_LOG_SECURITY:
487 flags = LOG_AUTH | LOG_NOTICE;
489 case DBUS_SYSTEM_LOG_FATAL:
490 flags = LOG_DAEMON|LOG_CRIT;
496 DBUS_VA_COPY (tmp, args);
497 vsyslog (flags, msg, tmp);
501 #if !defined(HAVE_SYSLOG_H) || !HAVE_DECL_LOG_PERROR
503 /* vsyslog() won't write to stderr, so we'd better do it */
504 DBUS_VA_COPY (tmp, args);
505 fprintf (stderr, "dbus[" DBUS_PID_FORMAT "]: ", _dbus_getpid ());
506 vfprintf (stderr, msg, tmp);
507 fputc ('\n', stderr);
512 if (severity == DBUS_SYSTEM_LOG_FATAL)
516 /** Installs a UNIX signal handler
518 * @param sig the signal to handle
519 * @param handler the handler
522 _dbus_set_signal_handler (int sig,
523 DBusSignalHandler handler)
525 struct sigaction act;
528 sigemptyset (&empty_mask);
529 act.sa_handler = handler;
530 act.sa_mask = empty_mask;
532 sigaction (sig, &act, NULL);
535 /** Checks if a file exists
537 * @param file full path to the file
538 * @returns #TRUE if file exists
541 _dbus_file_exists (const char *file)
543 return (access (file, F_OK) == 0);
546 /** Checks if user is at the console
548 * @param username user to check
549 * @param error return location for errors
550 * @returns #TRUE is the user is at the consolei and there are no errors
553 _dbus_user_at_console (const char *username,
561 if (!_dbus_string_init (&f))
563 _DBUS_SET_OOM (error);
567 if (!_dbus_string_append (&f, DBUS_CONSOLE_AUTH_DIR))
569 _DBUS_SET_OOM (error);
573 _dbus_string_init_const (&u, username);
575 if (!_dbus_concat_dir_and_file (&f, &u))
577 _DBUS_SET_OOM (error);
581 result = _dbus_file_exists (_dbus_string_get_const_data (&f));
584 _dbus_string_free (&f);
591 * Checks whether the filename is an absolute path
593 * @param filename the filename
594 * @returns #TRUE if an absolute path
597 _dbus_path_is_absolute (const DBusString *filename)
599 if (_dbus_string_get_length (filename) > 0)
600 return _dbus_string_get_byte (filename, 0) == '/';
608 * @param filename the filename to stat
609 * @param statbuf the stat info to fill in
610 * @param error return location for error
611 * @returns #FALSE if error was set
614 _dbus_stat (const DBusString *filename,
618 const char *filename_c;
621 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
623 filename_c = _dbus_string_get_const_data (filename);
625 if (stat (filename_c, &sb) < 0)
627 dbus_set_error (error, _dbus_error_from_errno (errno),
628 "%s", _dbus_strerror (errno));
632 statbuf->mode = sb.st_mode;
633 statbuf->nlink = sb.st_nlink;
634 statbuf->uid = sb.st_uid;
635 statbuf->gid = sb.st_gid;
636 statbuf->size = sb.st_size;
637 statbuf->atime = sb.st_atime;
638 statbuf->mtime = sb.st_mtime;
639 statbuf->ctime = sb.st_ctime;
646 * Internals of directory iterator
650 DIR *d; /**< The DIR* from opendir() */
655 * Open a directory to iterate over.
657 * @param filename the directory name
658 * @param error exception return object or #NULL
659 * @returns new iterator, or #NULL on error
662 _dbus_directory_open (const DBusString *filename,
667 const char *filename_c;
669 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
671 filename_c = _dbus_string_get_const_data (filename);
673 d = opendir (filename_c);
676 dbus_set_error (error, _dbus_error_from_errno (errno),
677 "Failed to read directory \"%s\": %s",
679 _dbus_strerror (errno));
682 iter = dbus_new0 (DBusDirIter, 1);
686 dbus_set_error (error, DBUS_ERROR_NO_MEMORY,
687 "Could not allocate memory for directory iterator");
697 * Get next file in the directory. Will not return "." or ".." on
698 * UNIX. If an error occurs, the contents of "filename" are
699 * undefined. The error is never set if the function succeeds.
701 * This function is not re-entrant, and not necessarily thread-safe.
702 * Only use it for test code or single-threaded utilities.
704 * @param iter the iterator
705 * @param filename string to be set to the next file in the dir
706 * @param error return location for error
707 * @returns #TRUE if filename was filled in with a new filename
710 _dbus_directory_get_next_file (DBusDirIter *iter,
711 DBusString *filename,
717 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
721 ent = readdir (iter->d);
728 dbus_set_error (error,
729 _dbus_error_from_errno (err),
730 "%s", _dbus_strerror (err));
734 else if (ent->d_name[0] == '.' &&
735 (ent->d_name[1] == '\0' ||
736 (ent->d_name[1] == '.' && ent->d_name[2] == '\0')))
740 _dbus_string_set_length (filename, 0);
741 if (!_dbus_string_append (filename, ent->d_name))
743 dbus_set_error (error, DBUS_ERROR_NO_MEMORY,
744 "No memory to read directory entry");
755 * Closes a directory iteration.
758 _dbus_directory_close (DBusDirIter *iter)
765 fill_user_info_from_group (struct group *g,
769 _dbus_assert (g->gr_name != NULL);
771 info->gid = g->gr_gid;
772 info->groupname = _dbus_strdup (g->gr_name);
774 /* info->members = dbus_strdupv (g->gr_mem) */
776 if (info->groupname == NULL)
778 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
786 fill_group_info (DBusGroupInfo *info,
788 const DBusString *groupname,
791 const char *group_c_str;
793 _dbus_assert (groupname != NULL || gid != DBUS_GID_UNSET);
794 _dbus_assert (groupname == NULL || gid == DBUS_GID_UNSET);
797 group_c_str = _dbus_string_get_const_data (groupname);
801 /* For now assuming that the getgrnam() and getgrgid() flavors
802 * always correspond to the pwnam flavors, if not we have
803 * to add more configure checks.
806 #if defined (HAVE_POSIX_GETPWNAM_R) || defined (HAVE_NONPOSIX_GETPWNAM_R)
815 /* retrieve maximum needed size for buf */
816 buflen = sysconf (_SC_GETGR_R_SIZE_MAX);
818 /* sysconf actually returns a long, but everything else expects size_t,
819 * so just recast here.
820 * https://bugs.freedesktop.org/show_bug.cgi?id=17061
822 if ((long) buflen <= 0)
828 buf = dbus_malloc (buflen);
831 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
836 #ifdef HAVE_POSIX_GETPWNAM_R
838 result = getgrnam_r (group_c_str, &g_str, buf, buflen,
841 result = getgrgid_r (gid, &g_str, buf, buflen,
844 g = getgrnam_r (group_c_str, &g_str, buf, buflen);
846 #endif /* !HAVE_POSIX_GETPWNAM_R */
847 /* Try a bigger buffer if ERANGE was returned:
848 https://bugs.freedesktop.org/show_bug.cgi?id=16727
850 if (result == ERANGE && buflen < 512 * 1024)
861 if (result == 0 && g == &g_str)
863 b = fill_user_info_from_group (g, info, error);
869 dbus_set_error (error, _dbus_error_from_errno (errno),
870 "Group %s unknown or failed to look it up\n",
871 group_c_str ? group_c_str : "???");
876 #else /* ! HAVE_GETPWNAM_R */
878 /* I guess we're screwed on thread safety here */
881 g = getgrnam (group_c_str);
885 return fill_user_info_from_group (g, info, error);
889 dbus_set_error (error, _dbus_error_from_errno (errno),
890 "Group %s unknown or failed to look it up\n",
891 group_c_str ? group_c_str : "???");
895 #endif /* ! HAVE_GETPWNAM_R */
899 * Initializes the given DBusGroupInfo struct
900 * with information about the given group name.
902 * @param info the group info struct
903 * @param groupname name of group
904 * @param error the error return
905 * @returns #FALSE if error is set
908 _dbus_group_info_fill (DBusGroupInfo *info,
909 const DBusString *groupname,
912 return fill_group_info (info, DBUS_GID_UNSET,
918 * Initializes the given DBusGroupInfo struct
919 * with information about the given group ID.
921 * @param info the group info struct
922 * @param gid group ID
923 * @param error the error return
924 * @returns #FALSE if error is set
927 _dbus_group_info_fill_gid (DBusGroupInfo *info,
931 return fill_group_info (info, gid, NULL, error);
935 * Parse a UNIX user from the bus config file. On Windows, this should
936 * simply always fail (just return #FALSE).
938 * @param username the username text
939 * @param uid_p place to return the uid
940 * @returns #TRUE on success
943 _dbus_parse_unix_user_from_config (const DBusString *username,
946 return _dbus_get_user_id (username, uid_p);
951 * Parse a UNIX group from the bus config file. On Windows, this should
952 * simply always fail (just return #FALSE).
954 * @param groupname the groupname text
955 * @param gid_p place to return the gid
956 * @returns #TRUE on success
959 _dbus_parse_unix_group_from_config (const DBusString *groupname,
962 return _dbus_get_group_id (groupname, gid_p);
966 * Gets all groups corresponding to the given UNIX user ID. On UNIX,
967 * just calls _dbus_groups_from_uid(). On Windows, should always
968 * fail since we don't know any UNIX groups.
971 * @param group_ids return location for array of group IDs
972 * @param n_group_ids return location for length of returned array
973 * @returns #TRUE if the UID existed and we got some credentials
976 _dbus_unix_groups_from_uid (dbus_uid_t uid,
977 dbus_gid_t **group_ids,
980 return _dbus_groups_from_uid (uid, group_ids, n_group_ids);
984 * Checks to see if the UNIX user ID is at the console.
985 * Should always fail on Windows (set the error to
986 * #DBUS_ERROR_NOT_SUPPORTED).
988 * @param uid UID of person to check
989 * @param error return location for errors
990 * @returns #TRUE if the UID is the same as the console user and there are no errors
993 _dbus_unix_user_is_at_console (dbus_uid_t uid,
996 return _dbus_is_console_user (uid, error);
1001 * Checks to see if the UNIX user ID matches the UID of
1002 * the process. Should always return #FALSE on Windows.
1004 * @param uid the UNIX user ID
1005 * @returns #TRUE if this uid owns the process.
1008 _dbus_unix_user_is_process_owner (dbus_uid_t uid)
1010 return uid == _dbus_geteuid ();
1014 * Checks to see if the Windows user SID matches the owner of
1015 * the process. Should always return #FALSE on UNIX.
1017 * @param windows_sid the Windows user SID
1018 * @returns #TRUE if this user owns the process.
1021 _dbus_windows_user_is_process_owner (const char *windows_sid)
1026 /** @} */ /* End of DBusInternalsUtils functions */
1029 * @addtogroup DBusString
1034 * Get the directory name from a complete filename
1035 * @param filename the filename
1036 * @param dirname string to append directory name to
1037 * @returns #FALSE if no memory
1040 _dbus_string_get_dirname (const DBusString *filename,
1041 DBusString *dirname)
1045 _dbus_assert (filename != dirname);
1046 _dbus_assert (filename != NULL);
1047 _dbus_assert (dirname != NULL);
1049 /* Ignore any separators on the end */
1050 sep = _dbus_string_get_length (filename);
1052 return _dbus_string_append (dirname, "."); /* empty string passed in */
1054 while (sep > 0 && _dbus_string_get_byte (filename, sep - 1) == '/')
1057 _dbus_assert (sep >= 0);
1060 return _dbus_string_append (dirname, "/");
1062 /* Now find the previous separator */
1063 _dbus_string_find_byte_backward (filename, sep, '/', &sep);
1065 return _dbus_string_append (dirname, ".");
1067 /* skip multiple separators */
1068 while (sep > 0 && _dbus_string_get_byte (filename, sep - 1) == '/')
1071 _dbus_assert (sep >= 0);
1074 _dbus_string_get_byte (filename, 0) == '/')
1075 return _dbus_string_append (dirname, "/");
1077 return _dbus_string_copy_len (filename, 0, sep - 0,
1078 dirname, _dbus_string_get_length (dirname));
1080 /** @} */ /* DBusString stuff */
1083 string_squash_nonprintable (DBusString *str)
1088 buf = _dbus_string_get_data (str);
1089 len = _dbus_string_get_length (str);
1091 for (i = 0; i < len; i++)
1093 unsigned char c = (unsigned char) buf[i];
1096 else if (c < 0x20 || c > 127)
1102 * Get a printable string describing the command used to execute
1103 * the process with pid. This string should only be used for
1104 * informative purposes such as logging; it may not be trusted.
1106 * The command is guaranteed to be printable ASCII and no longer
1109 * @param pid Process id
1110 * @param str Append command to this string
1111 * @param max_len Maximum length of returned command
1112 * @param error return location for errors
1113 * @returns #FALSE on error
1116 _dbus_command_for_pid (unsigned long pid,
1121 /* This is all Linux-specific for now */
1126 if (!_dbus_string_init (&path))
1128 _DBUS_SET_OOM (error);
1132 if (!_dbus_string_init (&cmdline))
1134 _DBUS_SET_OOM (error);
1135 _dbus_string_free (&path);
1139 if (!_dbus_string_append_printf (&path, "/proc/%ld/cmdline", pid))
1142 fd = open (_dbus_string_get_const_data (&path), O_RDONLY);
1145 dbus_set_error (error,
1146 _dbus_error_from_errno (errno),
1147 "Failed to open \"%s\": %s",
1148 _dbus_string_get_const_data (&path),
1149 _dbus_strerror (errno));
1153 if (!_dbus_read (fd, &cmdline, max_len))
1155 dbus_set_error (error,
1156 _dbus_error_from_errno (errno),
1157 "Failed to read from \"%s\": %s",
1158 _dbus_string_get_const_data (&path),
1159 _dbus_strerror (errno));
1163 if (!_dbus_close (fd, error))
1166 string_squash_nonprintable (&cmdline);
1168 if (!_dbus_string_copy (&cmdline, 0, str, _dbus_string_get_length (str)))
1171 _dbus_string_free (&cmdline);
1172 _dbus_string_free (&path);
1175 _DBUS_SET_OOM (error);
1177 _dbus_string_free (&cmdline);
1178 _dbus_string_free (&path);