1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-launch.c dbus-launch utility
4 * Copyright (C) 2003, 2006 Red Hat, Inc.
5 * Copyright (C) 2006 Thiago Macieira <thiago@kde.org>
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-launch.h"
38 #include <sys/select.h>
43 extern Display *xdisplay;
48 * If you are in a shell and run "dbus-launch myapp", here is what happens:
51 * \- main() --exec--> myapp[*]
52 * \- "intermediate parent"
53 * \- bus-runner --exec--> dbus-daemon --fork
54 * \- babysitter[*] \- final dbus-daemon[*]
56 * Processes marked [*] survive the initial flurry of activity.
58 * If you run "dbus-launch --sh-syntax" then the diagram is the same, except
59 * that main() prints variables and exits 0 instead of exec'ing myapp.
63 * dbus-daemon --print-pid -> bus_pid_to_launcher_pipe -> main
64 * dbus-daemon --print-address -> bus_address_to_launcher_pipe -> main
65 * main -> bus_pid_to_babysitter_pipe -> babysitter
67 * The intermediate parent looks pretty useless at first glance. Its purpose
68 * is to avoid the bus-runner becoming a zombie: when the intermediate parent
69 * terminates, the bus-runner and babysitter are reparented to init, which
70 * reaps them if they have finished. We can't rely on main() to reap arbitrary
71 * children because it might exec myapp, after which it can't be relied on to
72 * reap its children. We *can* rely on main() to reap the intermediate parent,
73 * because that happens before it execs myapp.
75 * It's unclear why dbus-daemon needs to fork, but we explicitly tell it to
76 * for some reason, then wait for it. If we left it undefined, a forking
77 * dbus-daemon would get the parent process reparented to init and reaped
78 * when the intermediate parent terminated, and a non-forking dbus-daemon
79 * would get reparented to init and carry on there.
81 * myapp is exec'd by the process that initially ran main() so that it's
82 * the shell's child, so the shell knows how to do job control and stuff.
83 * This is desirable for the "dbus-launch an application" use-case, less so
84 * for the "dbus-launch a test suite in an isolated session" use-case.
87 static char* machine_uuid = NULL;
90 get_machine_uuid (void)
96 save_machine_uuid (const char *uuid_arg)
98 if (strlen (uuid_arg) != 32)
100 fprintf (stderr, "machine ID '%s' looks like it's the wrong length, should be 32 hex digits",
105 machine_uuid = xstrdup (uuid_arg);
108 #define UUID_MAXLEN 40
109 /* Read the machine uuid from file if needed. Returns TRUE if machine_uuid is
110 * set after this function */
112 read_machine_uuid_if_needed (void)
115 char uuid[UUID_MAXLEN];
119 if (machine_uuid != NULL)
122 f = fopen (DBUS_MACHINE_UUID_FILE, "r");
126 if (fgets (uuid, UUID_MAXLEN, f) == NULL)
133 /* rstrip the read uuid */
134 while (len > 31 && isspace(uuid[len - 1]))
141 machine_uuid = xstrdup (uuid);
142 verbose ("UID: %s\n", machine_uuid);
152 verbose (const char *format,
156 static int verbose = TRUE;
157 static int verbose_initted = FALSE;
159 /* things are written a bit oddly here so that
160 * in the non-verbose case we just have the one
161 * conditional and return immediately.
166 if (!verbose_initted)
168 verbose = getenv ("DBUS_VERBOSE") != NULL;
169 verbose_initted = TRUE;
174 fprintf (stderr, "%lu: ", (unsigned long) getpid ());
176 va_start (args, format);
177 vfprintf (stderr, format, args);
184 fprintf (stderr, "dbus-launch [--version] [--help] [--sh-syntax] [--csh-syntax] [--auto-syntax] [--exit-with-session]\n");
191 printf ("D-Bus Message Bus Launcher %s\n"
192 "Copyright (C) 2003 Red Hat, Inc.\n"
193 "This is free software; see the source for copying conditions.\n"
194 "There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n",
200 xstrdup (const char *str)
210 copy = malloc (len + 1);
214 memcpy (copy, str, len + 1);
221 READ_STATUS_OK, /**< Read succeeded */
222 READ_STATUS_ERROR, /**< Some kind of error */
223 READ_STATUS_EOF /**< EOF returned */
234 memset (buf, '\0', maxlen);
235 maxlen -= 1; /* ensure nul term */
237 retval = READ_STATUS_OK;
245 to_read = maxlen - bytes;
253 if (chunk < 0 && errno == EINTR)
258 retval = READ_STATUS_ERROR;
263 retval = READ_STATUS_EOF;
270 if (retval == READ_STATUS_EOF &&
272 retval = READ_STATUS_OK;
275 if (retval != READ_STATUS_ERROR &&
277 buf[bytes-1] == '\n')
290 retval = READ_STATUS_OK;
298 to_read = sizeof (pid_t) - bytes;
304 ((char*)buf) + bytes,
306 if (chunk < 0 && errno == EINTR)
311 retval = READ_STATUS_ERROR;
316 retval = READ_STATUS_EOF;
327 do_write (int fd, const void *buf, size_t count)
329 size_t bytes_written;
336 ret = write (fd, ((const char*)buf) + bytes_written, count - bytes_written);
344 fprintf (stderr, "Failed to write data to pipe! %s\n",
346 exit (1); /* give up, we suck */
350 bytes_written += ret;
352 if (bytes_written < count)
360 do_write (fd, &pid, sizeof (pid));
364 do_waitpid (pid_t pid)
369 ret = waitpid (pid, NULL, 0);
378 static pid_t bus_pid_to_kill = -1;
383 verbose ("Killing message bus and exiting babysitter\n");
384 kill (bus_pid_to_kill, SIGTERM);
386 kill (bus_pid_to_kill, SIGKILL);
390 kill_bus_and_exit (int exitcode)
392 /* in case these point to any NFS mounts, get rid of them immediately */
403 print_variables (const char *bus_address, pid_t bus_pid, long bus_wid,
404 int c_shell_syntax, int bourne_shell_syntax,
409 do_write (1, bus_address, strlen (bus_address) + 1);
410 do_write (1, &bus_pid, sizeof bus_pid);
411 do_write (1, &bus_wid, sizeof bus_wid);
414 else if (c_shell_syntax)
416 printf ("setenv DBUS_SESSION_BUS_ADDRESS '%s';\n", bus_address);
417 printf ("set DBUS_SESSION_BUS_PID=%ld;\n", (long) bus_pid);
419 printf ("set DBUS_SESSION_BUS_WINDOWID=%ld;\n", (long) bus_wid);
422 else if (bourne_shell_syntax)
424 printf ("DBUS_SESSION_BUS_ADDRESS='%s';\n", bus_address);
425 printf ("export DBUS_SESSION_BUS_ADDRESS;\n");
426 printf ("DBUS_SESSION_BUS_PID=%ld;\n", (long) bus_pid);
428 printf ("DBUS_SESSION_BUS_WINDOWID=%ld;\n", (long) bus_wid);
433 printf ("DBUS_SESSION_BUS_ADDRESS=%s\n", bus_address);
434 printf ("DBUS_SESSION_BUS_PID=%ld\n", (long) bus_pid);
436 printf ("DBUS_SESSION_BUS_WINDOWID=%ld\n", (long) bus_wid);
441 static int got_sighup = FALSE;
444 signal_handler (int sig)
459 kill_bus_when_session_ends (void)
465 struct sigaction act;
468 /* install SIGHUP handler */
470 sigemptyset (&empty_mask);
471 act.sa_handler = signal_handler;
472 act.sa_mask = empty_mask;
474 sigaction (SIGHUP, &act, NULL);
475 sigaction (SIGTERM, &act, NULL);
476 sigaction (SIGINT, &act, NULL);
478 #ifdef DBUS_BUILD_X11
480 if (xdisplay != NULL)
482 x_fd = ConnectionNumber (xdisplay);
496 verbose ("stdin isatty(), monitoring it\n");
498 verbose ("stdin was not a TTY, not monitoring it\n");
500 if (tty_fd < 0 && x_fd < 0)
502 fprintf (stderr, "No terminal on standard input and no X display; cannot attach message bus to session lifetime\n");
508 #ifdef DBUS_BUILD_X11
509 /* Dump events on the floor, and let
510 * IO error handler run if we lose
511 * the X connection. It's important to
512 * run this before going into select() since
513 * we might have queued outgoing messages or
524 FD_SET (tty_fd, &read_set);
525 FD_SET (tty_fd, &err_set);
530 FD_SET (x_fd, &read_set);
531 FD_SET (x_fd, &err_set);
534 select (MAX (tty_fd, x_fd) + 1,
535 &read_set, NULL, &err_set, NULL);
539 verbose ("Got SIGHUP, exiting\n");
540 kill_bus_and_exit (0);
543 #ifdef DBUS_BUILD_X11
544 /* Events will be processed before we select again
547 verbose ("X fd condition reading = %d error = %d\n",
548 FD_ISSET (x_fd, &read_set),
549 FD_ISSET (x_fd, &err_set));
554 if (FD_ISSET (tty_fd, &read_set))
559 verbose ("TTY ready for reading\n");
561 bytes_read = read (tty_fd, discard, sizeof (discard));
563 verbose ("Read %d bytes from TTY errno = %d\n",
567 kill_bus_and_exit (0); /* EOF */
568 else if (bytes_read < 0 && errno != EINTR)
570 /* This shouldn't happen I don't think; to avoid
571 * spinning on the fd forever we exit.
573 fprintf (stderr, "dbus-launch: error reading from stdin: %s\n",
575 kill_bus_and_exit (0);
578 else if (FD_ISSET (tty_fd, &err_set))
580 verbose ("TTY has error condition\n");
582 kill_bus_and_exit (0);
589 babysit (int exit_with_session,
591 int read_bus_pid_fd) /* read pid from here */
597 verbose ("babysitting, exit_with_session = %d, child_pid = %ld, read_bus_pid_fd = %d\n",
598 exit_with_session, (long) child_pid, read_bus_pid_fd);
600 /* We chdir ("/") since we are persistent and daemon-like, and fork
601 * again so dbus-launch can reap the parent. However, we don't
602 * setsid() or close fd 0 because the idea is to remain attached
603 * to the tty and the X server in order to kill the message bus
604 * when the session ends.
609 fprintf (stderr, "Could not change to root directory: %s\n",
614 /* Close stdout/stderr so we don't block an "eval" or otherwise
615 * lock up. stdout is still chaining through to dbus-launch
616 * and in turn to the parent shell.
618 dev_null_fd = open ("/dev/null", O_RDWR);
619 if (dev_null_fd >= 0)
621 if (!exit_with_session)
622 dup2 (dev_null_fd, 0);
623 dup2 (dev_null_fd, 1);
624 s = getenv ("DBUS_DEBUG_OUTPUT");
625 if (s == NULL || *s == '\0')
626 dup2 (dev_null_fd, 2);
630 fprintf (stderr, "Failed to open /dev/null: %s\n",
632 /* continue, why not */
639 fprintf (stderr, "fork() failed in babysitter: %s\n",
646 /* Parent reaps pre-fork part of bus daemon, then exits and is
647 * reaped so the babysitter isn't a zombie
650 verbose ("=== Babysitter's intermediate parent continues again\n");
652 if (do_waitpid (child_pid) < 0)
654 /* shouldn't happen */
655 fprintf (stderr, "Failed waitpid() waiting for bus daemon's parent\n");
659 verbose ("Babysitter's intermediate parent exiting\n");
664 /* Child continues */
665 verbose ("=== Babysitter process created\n");
667 verbose ("Reading PID from bus\n");
669 switch (read_pid (read_bus_pid_fd, &bus_pid_to_kill))
673 case READ_STATUS_EOF:
674 fprintf (stderr, "EOF in dbus-launch reading PID from bus daemon\n");
677 case READ_STATUS_ERROR:
678 fprintf (stderr, "Error in dbus-launch reading PID from bus daemon: %s\n",
684 verbose ("Got PID %ld from daemon\n",
685 (long) bus_pid_to_kill);
687 if (exit_with_session)
689 /* Bus is now started and launcher has needed info;
690 * we connect to X display and tty and wait to
691 * kill bus if requested.
694 kill_bus_when_session_ends ();
697 verbose ("Babysitter exiting\n");
703 do_close_stderr (void)
709 /* dbus-launch is a Unix-only program, so we can rely on /dev/null being there.
710 * We're including unistd.h and we're dealing with sh/csh launch sequences...
712 fd = open ("/dev/null", O_RDWR);
715 fprintf (stderr, "Internal error: cannot open /dev/null: %s", strerror (errno));
720 if (dup2 (fd, 2) == -1)
722 /* error; we can't report an error anymore... */
729 pass_info (const char *runprog, const char *bus_address, pid_t bus_pid,
730 long bus_wid, int c_shell_syntax, int bourne_shell_syntax,
732 int argc, char **argv, int remaining_args)
741 envvar = malloc (strlen ("DBUS_SESSION_BUS_ADDRESS=") +
742 strlen (bus_address) + 1);
743 args = malloc (sizeof (char *) * ((argc-remaining_args)+2));
745 if (envvar == NULL || args == NULL)
748 args[0] = xstrdup (runprog);
751 for (i = 1; i <= (argc-remaining_args); i++)
753 size_t len = strlen (argv[remaining_args+i-1])+1;
754 args[i] = malloc (len);
757 strncpy (args[i], argv[remaining_args+i-1], len);
761 strcpy (envvar, "DBUS_SESSION_BUS_ADDRESS=");
762 strcat (envvar, bus_address);
765 execvp (runprog, args);
766 fprintf (stderr, "Couldn't exec %s: %s\n", runprog, strerror (errno));
771 print_variables (bus_address, bus_pid, bus_wid, c_shell_syntax,
772 bourne_shell_syntax, binary_syntax);
774 verbose ("dbus-launch exiting\n");
788 fprintf (stderr, "Out of memory!");
796 main (int argc, char **argv)
798 const char *prev_arg;
800 const char *runprog = NULL;
801 int remaining_args = 0;
802 int exit_with_session;
803 int binary_syntax = FALSE;
804 int c_shell_syntax = FALSE;
805 int bourne_shell_syntax = FALSE;
806 int auto_shell_syntax = FALSE;
807 int autolaunch = FALSE;
808 int requires_arg = FALSE;
809 int close_stderr = FALSE;
812 int bus_pid_to_launcher_pipe[2];
813 int bus_pid_to_babysitter_pipe[2];
814 int bus_address_to_launcher_pipe[2];
817 exit_with_session = FALSE;
824 const char *arg = argv[i];
826 if (strcmp (arg, "--help") == 0 ||
827 strcmp (arg, "-h") == 0 ||
828 strcmp (arg, "-?") == 0)
830 else if (strcmp (arg, "--auto-syntax") == 0)
831 auto_shell_syntax = TRUE;
832 else if (strcmp (arg, "-c") == 0 ||
833 strcmp (arg, "--csh-syntax") == 0)
834 c_shell_syntax = TRUE;
835 else if (strcmp (arg, "-s") == 0 ||
836 strcmp (arg, "--sh-syntax") == 0)
837 bourne_shell_syntax = TRUE;
838 else if (strcmp (arg, "--binary-syntax") == 0)
839 binary_syntax = TRUE;
840 else if (strcmp (arg, "--version") == 0)
842 else if (strcmp (arg, "--exit-with-session") == 0)
843 exit_with_session = TRUE;
844 else if (strcmp (arg, "--close-stderr") == 0)
846 else if (strstr (arg, "--autolaunch=") == arg)
852 fprintf (stderr, "--autolaunch given twice\n");
858 s = strchr (arg, '=');
861 save_machine_uuid (s);
864 strcmp (prev_arg, "--autolaunch") == 0)
868 fprintf (stderr, "--autolaunch given twice\n");
874 save_machine_uuid (arg);
875 requires_arg = FALSE;
877 else if (strcmp (arg, "--autolaunch") == 0)
879 else if (strstr (arg, "--config-file=") == arg)
883 if (config_file != NULL)
885 fprintf (stderr, "--config-file given twice\n");
889 file = strchr (arg, '=');
892 config_file = xstrdup (file);
895 strcmp (prev_arg, "--config-file") == 0)
897 if (config_file != NULL)
899 fprintf (stderr, "--config-file given twice\n");
903 config_file = xstrdup (arg);
904 requires_arg = FALSE;
906 else if (strcmp (arg, "--config-file") == 0)
908 else if (arg[0] == '-')
910 if (strcmp (arg, "--") != 0)
912 fprintf (stderr, "Option `%s' is unknown.\n", arg);
918 remaining_args = i+2;
925 remaining_args = i+1;
935 fprintf (stderr, "Option `%s' requires an argument.\n", prev_arg);
939 if (auto_shell_syntax)
941 if ((shname = getenv ("SHELL")) != NULL)
943 if (!strncmp (shname + strlen (shname) - 3, "csh", 3))
944 c_shell_syntax = TRUE;
946 bourne_shell_syntax = TRUE;
949 bourne_shell_syntax = TRUE;
952 if (exit_with_session)
953 verbose ("--exit-with-session enabled\n");
957 #ifndef DBUS_BUILD_X11
958 fprintf (stderr, "Autolaunch requested, but X11 support not compiled in.\n"
959 "Cannot continue.\n");
961 #else /* DBUS_BUILD_X11 */
962 #ifndef DBUS_ENABLE_X11_AUTOLAUNCH
963 fprintf (stderr, "X11 autolaunch support disabled at compile time.\n");
965 #else /* DBUS_ENABLE_X11_AUTOLAUNCH */
970 if (get_machine_uuid () == NULL)
972 fprintf (stderr, "Machine UUID not provided as arg to --autolaunch\n");
976 verbose ("Autolaunch enabled (using X11).\n");
977 if (!exit_with_session)
979 verbose ("--exit-with-session automatically enabled\n");
980 exit_with_session = TRUE;
985 fprintf (stderr, "Autolaunch error: X11 initialization failed.\n");
989 if (!x11_get_address (&address, &pid, &wid))
991 fprintf (stderr, "Autolaunch error: X11 communication error.\n");
997 verbose ("dbus-daemon is already running. Returning existing parameters.\n");
998 pass_info (runprog, address, pid, wid, c_shell_syntax,
999 bourne_shell_syntax, binary_syntax, argc, argv, remaining_args);
1002 #endif /* DBUS_ENABLE_X11_AUTOLAUNCH */
1004 else if (read_machine_uuid_if_needed())
1007 #endif /* DBUS_BUILD_X11 */
1011 if (pipe (bus_pid_to_launcher_pipe) < 0 ||
1012 pipe (bus_address_to_launcher_pipe) < 0 ||
1013 pipe (bus_pid_to_babysitter_pipe) < 0)
1016 "Failed to create pipe: %s\n",
1024 fprintf (stderr, "Failed to fork: %s\n",
1032 #define MAX_FD_LEN 64
1033 char write_pid_fd_as_string[MAX_FD_LEN];
1034 char write_address_fd_as_string[MAX_FD_LEN];
1036 #ifdef DBUS_BUILD_X11
1043 verbose ("=== Babysitter's intermediate parent created\n");
1045 /* Fork once more to create babysitter */
1050 fprintf (stderr, "Failed to fork: %s\n",
1058 verbose ("=== Babysitter's intermediate parent continues\n");
1060 close (bus_pid_to_launcher_pipe[READ_END]);
1061 close (bus_pid_to_launcher_pipe[WRITE_END]);
1062 close (bus_address_to_launcher_pipe[READ_END]);
1063 close (bus_address_to_launcher_pipe[WRITE_END]);
1064 close (bus_pid_to_babysitter_pipe[WRITE_END]);
1066 /* babysit() will fork *again*
1067 * and will also reap the pre-forked bus
1070 babysit (exit_with_session, ret,
1071 bus_pid_to_babysitter_pipe[READ_END]);
1075 verbose ("=== Bus exec process created\n");
1077 /* Now we are the bus process (well, almost;
1078 * dbus-daemon itself forks again)
1080 close (bus_pid_to_launcher_pipe[READ_END]);
1081 close (bus_address_to_launcher_pipe[READ_END]);
1082 close (bus_pid_to_babysitter_pipe[READ_END]);
1083 close (bus_pid_to_babysitter_pipe[WRITE_END]);
1085 sprintf (write_pid_fd_as_string,
1086 "%d", bus_pid_to_launcher_pipe[WRITE_END]);
1088 sprintf (write_address_fd_as_string,
1089 "%d", bus_address_to_launcher_pipe[WRITE_END]);
1091 verbose ("Calling exec()\n");
1093 #ifdef DBUS_BUILD_TESTS
1094 /* exec from testdir */
1095 if (getenv("DBUS_USE_TEST_BINARY") != NULL)
1097 execl (TEST_BUS_BINARY,
1100 "--print-pid", write_pid_fd_as_string,
1101 "--print-address", write_address_fd_as_string,
1102 config_file ? "--config-file" : "--session",
1103 config_file, /* has to be last in this varargs list */
1107 "Failed to execute test message bus daemon %s: %s. Will try again with the system path.\n",
1108 TEST_BUS_BINARY, strerror (errno));
1110 #endif /* DBUS_BUILD_TESTS */
1112 execl (DBUS_DAEMONDIR"/dbus-daemon",
1113 DBUS_DAEMONDIR"/dbus-daemon",
1115 "--print-pid", write_pid_fd_as_string,
1116 "--print-address", write_address_fd_as_string,
1117 config_file ? "--config-file" : "--session",
1118 config_file, /* has to be last in this varargs list */
1122 "Failed to execute message bus daemon %s: %s. Will try again without full path.\n",
1123 DBUS_DAEMONDIR"/dbus-daemon", strerror (errno));
1126 * If it failed, try running without full PATH. Note this is needed
1127 * because the build process builds the run-with-tmp-session-bus.conf
1128 * file and the dbus-daemon will not be in the install location during
1131 execlp ("dbus-daemon",
1134 "--print-pid", write_pid_fd_as_string,
1135 "--print-address", write_address_fd_as_string,
1136 config_file ? "--config-file" : "--session",
1137 config_file, /* has to be last in this varargs list */
1141 "Failed to execute message bus daemon: %s\n",
1148 #define MAX_PID_LEN 64
1150 char bus_address[MAX_ADDR_LEN];
1151 char buf[MAX_PID_LEN];
1157 verbose ("=== Parent dbus-launch continues\n");
1159 close (bus_pid_to_launcher_pipe[WRITE_END]);
1160 close (bus_address_to_launcher_pipe[WRITE_END]);
1161 close (bus_pid_to_babysitter_pipe[READ_END]);
1163 verbose ("Waiting for babysitter's intermediate parent\n");
1165 /* Immediately reap parent of babysitter
1166 * (which was created just for us to reap)
1168 if (do_waitpid (ret) < 0)
1170 fprintf (stderr, "Failed to waitpid() for babysitter intermediate process: %s\n",
1175 verbose ("Reading address from bus\n");
1177 /* Read the pipe data, print, and exit */
1178 switch (read_line (bus_address_to_launcher_pipe[READ_END],
1179 bus_address, MAX_ADDR_LEN))
1181 case READ_STATUS_OK:
1183 case READ_STATUS_EOF:
1184 fprintf (stderr, "EOF in dbus-launch reading address from bus daemon\n");
1187 case READ_STATUS_ERROR:
1188 fprintf (stderr, "Error in dbus-launch reading address from bus daemon: %s\n",
1194 close (bus_address_to_launcher_pipe[READ_END]);
1196 verbose ("Reading PID from daemon\n");
1198 switch (read_line (bus_pid_to_launcher_pipe[READ_END], buf, MAX_PID_LEN))
1200 case READ_STATUS_OK:
1202 case READ_STATUS_EOF:
1203 fprintf (stderr, "EOF reading PID from bus daemon\n");
1206 case READ_STATUS_ERROR:
1207 fprintf (stderr, "Error reading PID from bus daemon: %s\n",
1214 val = strtol (buf, &end, 0);
1215 if (buf == end || end == NULL)
1217 fprintf (stderr, "Failed to parse bus PID \"%s\": %s\n",
1218 buf, strerror (errno));
1224 close (bus_pid_to_launcher_pipe[READ_END]);
1226 #ifdef DBUS_ENABLE_X11_AUTOLAUNCH
1227 if (xdisplay != NULL)
1229 verbose("Saving x11 address\n");
1230 ret2 = x11_save_address (bus_address, bus_pid, &wid);
1231 /* Only get an existing dbus session when autolaunching */
1236 char *address = NULL;
1237 /* another window got added. Return its address */
1238 bus_pid_to_kill = bus_pid;
1239 if (x11_get_address (&address, &bus_pid, &wid)
1242 verbose ("dbus-daemon is already running. Returning existing parameters.\n");
1243 /* Kill the old bus */
1245 pass_info (runprog, address, bus_pid, wid,
1246 c_shell_syntax, bourne_shell_syntax, binary_syntax,
1247 argc, argv, remaining_args);
1252 fprintf (stderr, "Error saving bus information.\n");
1253 bus_pid_to_kill = bus_pid;
1254 kill_bus_and_exit (1);
1260 /* Forward the pid to the babysitter */
1261 write_pid (bus_pid_to_babysitter_pipe[WRITE_END], bus_pid);
1262 close (bus_pid_to_babysitter_pipe[WRITE_END]);
1264 pass_info (runprog, bus_address, bus_pid, wid, c_shell_syntax,
1265 bourne_shell_syntax, binary_syntax, argc, argv, remaining_args);