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 #ifdef DBUS_BUILD_X11
109 #define UUID_MAXLEN 40
110 /* Read the machine uuid from file if needed. Returns TRUE if machine_uuid is
111 * set after this function */
113 read_machine_uuid_if_needed (void)
116 char uuid[UUID_MAXLEN];
120 if (machine_uuid != NULL)
123 f = fopen (DBUS_MACHINE_UUID_FILE, "r");
127 if (fgets (uuid, UUID_MAXLEN, f) == NULL)
134 /* rstrip the read uuid */
135 while (len > 31 && isspace(uuid[len - 1]))
142 machine_uuid = xstrdup (uuid);
143 verbose ("UID: %s\n", machine_uuid);
150 #endif /* DBUS_BUILD_X11 */
153 verbose (const char *format,
157 static int verbose = TRUE;
158 static int verbose_initted = FALSE;
160 /* things are written a bit oddly here so that
161 * in the non-verbose case we just have the one
162 * conditional and return immediately.
167 if (!verbose_initted)
169 verbose = getenv ("DBUS_VERBOSE") != NULL;
170 verbose_initted = TRUE;
175 fprintf (stderr, "%lu: ", (unsigned long) getpid ());
177 va_start (args, format);
178 vfprintf (stderr, format, args);
185 fprintf (stderr, "dbus-launch [--version] [--help] [--sh-syntax] [--csh-syntax] [--auto-syntax] [--exit-with-session]\n");
192 printf ("D-Bus Message Bus Launcher %s\n"
193 "Copyright (C) 2003 Red Hat, Inc.\n"
194 "This is free software; see the source for copying conditions.\n"
195 "There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n",
201 xstrdup (const char *str)
211 copy = malloc (len + 1);
215 memcpy (copy, str, len + 1);
222 READ_STATUS_OK, /**< Read succeeded */
223 READ_STATUS_ERROR, /**< Some kind of error */
224 READ_STATUS_EOF /**< EOF returned */
235 memset (buf, '\0', maxlen);
236 maxlen -= 1; /* ensure nul term */
238 retval = READ_STATUS_OK;
246 to_read = maxlen - bytes;
254 if (chunk < 0 && errno == EINTR)
259 retval = READ_STATUS_ERROR;
264 retval = READ_STATUS_EOF;
271 if (retval == READ_STATUS_EOF &&
273 retval = READ_STATUS_OK;
276 if (retval != READ_STATUS_ERROR &&
278 buf[bytes-1] == '\n')
291 retval = READ_STATUS_OK;
299 to_read = sizeof (pid_t) - bytes;
305 ((char*)buf) + bytes,
307 if (chunk < 0 && errno == EINTR)
312 retval = READ_STATUS_ERROR;
317 retval = READ_STATUS_EOF;
328 do_write (int fd, const void *buf, size_t count)
330 size_t bytes_written;
337 ret = write (fd, ((const char*)buf) + bytes_written, count - bytes_written);
345 fprintf (stderr, "Failed to write data to pipe! %s\n",
347 exit (1); /* give up, we suck */
351 bytes_written += ret;
353 if (bytes_written < count)
361 do_write (fd, &pid, sizeof (pid));
365 do_waitpid (pid_t pid)
370 ret = waitpid (pid, NULL, 0);
379 static pid_t bus_pid_to_kill = -1;
384 verbose ("Killing message bus and exiting babysitter\n");
385 kill (bus_pid_to_kill, SIGTERM);
387 kill (bus_pid_to_kill, SIGKILL);
391 kill_bus_and_exit (int exitcode)
393 /* in case these point to any NFS mounts, get rid of them immediately */
404 print_variables (const char *bus_address, pid_t bus_pid, long bus_wid,
405 int c_shell_syntax, int bourne_shell_syntax,
410 do_write (1, bus_address, strlen (bus_address) + 1);
411 do_write (1, &bus_pid, sizeof bus_pid);
412 do_write (1, &bus_wid, sizeof bus_wid);
415 else if (c_shell_syntax)
417 printf ("setenv DBUS_SESSION_BUS_ADDRESS '%s';\n", bus_address);
418 printf ("set DBUS_SESSION_BUS_PID=%ld;\n", (long) bus_pid);
420 printf ("set DBUS_SESSION_BUS_WINDOWID=%ld;\n", (long) bus_wid);
423 else if (bourne_shell_syntax)
425 printf ("DBUS_SESSION_BUS_ADDRESS='%s';\n", bus_address);
426 printf ("export DBUS_SESSION_BUS_ADDRESS;\n");
427 printf ("DBUS_SESSION_BUS_PID=%ld;\n", (long) bus_pid);
429 printf ("DBUS_SESSION_BUS_WINDOWID=%ld;\n", (long) bus_wid);
434 printf ("DBUS_SESSION_BUS_ADDRESS=%s\n", bus_address);
435 printf ("DBUS_SESSION_BUS_PID=%ld\n", (long) bus_pid);
437 printf ("DBUS_SESSION_BUS_WINDOWID=%ld\n", (long) bus_wid);
442 static int got_sighup = FALSE;
445 signal_handler (int sig)
460 kill_bus_when_session_ends (void)
466 struct sigaction act;
469 /* install SIGHUP handler */
471 sigemptyset (&empty_mask);
472 act.sa_handler = signal_handler;
473 act.sa_mask = empty_mask;
475 sigaction (SIGHUP, &act, NULL);
476 sigaction (SIGTERM, &act, NULL);
477 sigaction (SIGINT, &act, NULL);
479 #ifdef DBUS_BUILD_X11
481 if (xdisplay != NULL)
483 x_fd = ConnectionNumber (xdisplay);
498 verbose ("session lifetime is defined by X, not monitoring stdin\n");
501 else if (tty_fd >= 0)
503 verbose ("stdin isatty(), monitoring it\n");
507 verbose ("stdin was not a TTY, not monitoring it\n");
510 if (tty_fd < 0 && x_fd < 0)
512 fprintf (stderr, "No terminal on standard input and no X display; cannot attach message bus to session lifetime\n");
518 #ifdef DBUS_BUILD_X11
519 /* Dump events on the floor, and let
520 * IO error handler run if we lose
521 * the X connection. It's important to
522 * run this before going into select() since
523 * we might have queued outgoing messages or
534 FD_SET (tty_fd, &read_set);
535 FD_SET (tty_fd, &err_set);
540 FD_SET (x_fd, &read_set);
541 FD_SET (x_fd, &err_set);
544 select (MAX (tty_fd, x_fd) + 1,
545 &read_set, NULL, &err_set, NULL);
549 verbose ("Got SIGHUP, exiting\n");
550 kill_bus_and_exit (0);
553 #ifdef DBUS_BUILD_X11
554 /* Events will be processed before we select again
557 verbose ("X fd condition reading = %d error = %d\n",
558 FD_ISSET (x_fd, &read_set),
559 FD_ISSET (x_fd, &err_set));
564 if (FD_ISSET (tty_fd, &read_set))
569 verbose ("TTY ready for reading\n");
571 bytes_read = read (tty_fd, discard, sizeof (discard));
573 verbose ("Read %d bytes from TTY errno = %d\n",
577 kill_bus_and_exit (0); /* EOF */
578 else if (bytes_read < 0 && errno != EINTR)
580 /* This shouldn't happen I don't think; to avoid
581 * spinning on the fd forever we exit.
583 fprintf (stderr, "dbus-launch: error reading from stdin: %s\n",
585 kill_bus_and_exit (0);
588 else if (FD_ISSET (tty_fd, &err_set))
590 verbose ("TTY has error condition\n");
592 kill_bus_and_exit (0);
599 babysit (int exit_with_session,
601 int read_bus_pid_fd) /* read pid from here */
607 verbose ("babysitting, exit_with_session = %d, child_pid = %ld, read_bus_pid_fd = %d\n",
608 exit_with_session, (long) child_pid, read_bus_pid_fd);
610 /* We chdir ("/") since we are persistent and daemon-like, and fork
611 * again so dbus-launch can reap the parent. However, we don't
612 * setsid() or close fd 0 because the idea is to remain attached
613 * to the tty and the X server in order to kill the message bus
614 * when the session ends.
619 fprintf (stderr, "Could not change to root directory: %s\n",
624 /* Close stdout/stderr so we don't block an "eval" or otherwise
625 * lock up. stdout is still chaining through to dbus-launch
626 * and in turn to the parent shell.
628 dev_null_fd = open ("/dev/null", O_RDWR);
629 if (dev_null_fd >= 0)
631 if (!exit_with_session)
632 dup2 (dev_null_fd, 0);
633 dup2 (dev_null_fd, 1);
634 s = getenv ("DBUS_DEBUG_OUTPUT");
635 if (s == NULL || *s == '\0')
636 dup2 (dev_null_fd, 2);
641 fprintf (stderr, "Failed to open /dev/null: %s\n",
643 /* continue, why not */
650 fprintf (stderr, "fork() failed in babysitter: %s\n",
657 /* Parent reaps pre-fork part of bus daemon, then exits and is
658 * reaped so the babysitter isn't a zombie
661 verbose ("=== Babysitter's intermediate parent continues again\n");
663 if (do_waitpid (child_pid) < 0)
665 /* shouldn't happen */
666 fprintf (stderr, "Failed waitpid() waiting for bus daemon's parent\n");
670 verbose ("Babysitter's intermediate parent exiting\n");
675 /* Child continues */
676 verbose ("=== Babysitter process created\n");
678 verbose ("Reading PID from bus\n");
680 switch (read_pid (read_bus_pid_fd, &bus_pid_to_kill))
684 case READ_STATUS_EOF:
685 fprintf (stderr, "EOF in dbus-launch reading PID from bus daemon\n");
688 case READ_STATUS_ERROR:
689 fprintf (stderr, "Error in dbus-launch reading PID from bus daemon: %s\n",
695 verbose ("Got PID %ld from daemon\n",
696 (long) bus_pid_to_kill);
698 if (exit_with_session)
700 /* Bus is now started and launcher has needed info;
701 * we connect to X display and tty and wait to
702 * kill bus if requested.
705 kill_bus_when_session_ends ();
708 verbose ("Babysitter exiting\n");
714 do_close_stderr (void)
720 /* dbus-launch is a Unix-only program, so we can rely on /dev/null being there.
721 * We're including unistd.h and we're dealing with sh/csh launch sequences...
723 fd = open ("/dev/null", O_RDWR);
726 fprintf (stderr, "Internal error: cannot open /dev/null: %s", strerror (errno));
731 if (dup2 (fd, 2) == -1)
733 /* error; we can't report an error anymore... */
740 pass_info (const char *runprog, const char *bus_address, pid_t bus_pid,
741 long bus_wid, int c_shell_syntax, int bourne_shell_syntax,
743 int argc, char **argv, int remaining_args)
752 envvar = malloc (strlen ("DBUS_SESSION_BUS_ADDRESS=") +
753 strlen (bus_address) + 1);
754 args = malloc (sizeof (char *) * ((argc-remaining_args)+2));
756 if (envvar == NULL || args == NULL)
759 args[0] = xstrdup (runprog);
762 for (i = 1; i <= (argc-remaining_args); i++)
764 size_t len = strlen (argv[remaining_args+i-1])+1;
765 args[i] = malloc (len);
768 strncpy (args[i], argv[remaining_args+i-1], len);
772 strcpy (envvar, "DBUS_SESSION_BUS_ADDRESS=");
773 strcat (envvar, bus_address);
776 execvp (runprog, args);
777 fprintf (stderr, "Couldn't exec %s: %s\n", runprog, strerror (errno));
782 print_variables (bus_address, bus_pid, bus_wid, c_shell_syntax,
783 bourne_shell_syntax, binary_syntax);
785 verbose ("dbus-launch exiting\n");
799 fprintf (stderr, "Out of memory!");
807 main (int argc, char **argv)
809 const char *prev_arg;
811 const char *runprog = NULL;
812 int remaining_args = 0;
813 int exit_with_session;
814 int binary_syntax = FALSE;
815 int c_shell_syntax = FALSE;
816 int bourne_shell_syntax = FALSE;
817 int auto_shell_syntax = FALSE;
818 int autolaunch = FALSE;
819 int requires_arg = FALSE;
820 int close_stderr = FALSE;
823 int bus_pid_to_launcher_pipe[2];
824 int bus_pid_to_babysitter_pipe[2];
825 int bus_address_to_launcher_pipe[2];
828 exit_with_session = FALSE;
835 const char *arg = argv[i];
837 if (strcmp (arg, "--help") == 0 ||
838 strcmp (arg, "-h") == 0 ||
839 strcmp (arg, "-?") == 0)
841 else if (strcmp (arg, "--auto-syntax") == 0)
842 auto_shell_syntax = TRUE;
843 else if (strcmp (arg, "-c") == 0 ||
844 strcmp (arg, "--csh-syntax") == 0)
845 c_shell_syntax = TRUE;
846 else if (strcmp (arg, "-s") == 0 ||
847 strcmp (arg, "--sh-syntax") == 0)
848 bourne_shell_syntax = TRUE;
849 else if (strcmp (arg, "--binary-syntax") == 0)
850 binary_syntax = TRUE;
851 else if (strcmp (arg, "--version") == 0)
853 else if (strcmp (arg, "--exit-with-session") == 0)
854 exit_with_session = TRUE;
855 else if (strcmp (arg, "--close-stderr") == 0)
857 else if (strstr (arg, "--autolaunch=") == arg)
863 fprintf (stderr, "--autolaunch given twice\n");
869 s = strchr (arg, '=');
872 save_machine_uuid (s);
875 strcmp (prev_arg, "--autolaunch") == 0)
879 fprintf (stderr, "--autolaunch given twice\n");
885 save_machine_uuid (arg);
886 requires_arg = FALSE;
888 else if (strcmp (arg, "--autolaunch") == 0)
890 else if (strstr (arg, "--config-file=") == arg)
894 if (config_file != NULL)
896 fprintf (stderr, "--config-file given twice\n");
900 file = strchr (arg, '=');
903 config_file = xstrdup (file);
906 strcmp (prev_arg, "--config-file") == 0)
908 if (config_file != NULL)
910 fprintf (stderr, "--config-file given twice\n");
914 config_file = xstrdup (arg);
915 requires_arg = FALSE;
917 else if (strcmp (arg, "--config-file") == 0)
919 else if (arg[0] == '-')
921 if (strcmp (arg, "--") != 0)
923 fprintf (stderr, "Option `%s' is unknown.\n", arg);
929 remaining_args = i+2;
936 remaining_args = i+1;
946 fprintf (stderr, "Option `%s' requires an argument.\n", prev_arg);
950 if (auto_shell_syntax)
952 if ((shname = getenv ("SHELL")) != NULL)
954 if (!strncmp (shname + strlen (shname) - 3, "csh", 3))
955 c_shell_syntax = TRUE;
957 bourne_shell_syntax = TRUE;
960 bourne_shell_syntax = TRUE;
963 if (exit_with_session)
964 verbose ("--exit-with-session enabled\n");
968 #ifndef DBUS_BUILD_X11
969 fprintf (stderr, "Autolaunch requested, but X11 support not compiled in.\n"
970 "Cannot continue.\n");
972 #else /* DBUS_BUILD_X11 */
973 #ifndef DBUS_ENABLE_X11_AUTOLAUNCH
974 fprintf (stderr, "X11 autolaunch support disabled at compile time.\n");
976 #else /* DBUS_ENABLE_X11_AUTOLAUNCH */
981 if (get_machine_uuid () == NULL)
983 fprintf (stderr, "Machine UUID not provided as arg to --autolaunch\n");
987 verbose ("Autolaunch enabled (using X11).\n");
988 if (!exit_with_session)
990 verbose ("--exit-with-session automatically enabled\n");
991 exit_with_session = TRUE;
996 fprintf (stderr, "Autolaunch error: X11 initialization failed.\n");
1000 if (!x11_get_address (&address, &pid, &wid))
1002 fprintf (stderr, "Autolaunch error: X11 communication error.\n");
1006 if (address != NULL)
1008 verbose ("dbus-daemon is already running. Returning existing parameters.\n");
1009 pass_info (runprog, address, pid, wid, c_shell_syntax,
1010 bourne_shell_syntax, binary_syntax, argc, argv, remaining_args);
1013 #endif /* DBUS_ENABLE_X11_AUTOLAUNCH */
1015 else if (read_machine_uuid_if_needed())
1018 #endif /* DBUS_BUILD_X11 */
1022 if (pipe (bus_pid_to_launcher_pipe) < 0 ||
1023 pipe (bus_address_to_launcher_pipe) < 0 ||
1024 pipe (bus_pid_to_babysitter_pipe) < 0)
1027 "Failed to create pipe: %s\n",
1035 fprintf (stderr, "Failed to fork: %s\n",
1043 #define MAX_FD_LEN 64
1044 char write_pid_fd_as_string[MAX_FD_LEN];
1045 char write_address_fd_as_string[MAX_FD_LEN];
1047 #ifdef DBUS_BUILD_X11
1054 verbose ("=== Babysitter's intermediate parent created\n");
1056 /* Fork once more to create babysitter */
1061 fprintf (stderr, "Failed to fork: %s\n",
1069 verbose ("=== Babysitter's intermediate parent continues\n");
1071 close (bus_pid_to_launcher_pipe[READ_END]);
1072 close (bus_pid_to_launcher_pipe[WRITE_END]);
1073 close (bus_address_to_launcher_pipe[READ_END]);
1074 close (bus_address_to_launcher_pipe[WRITE_END]);
1075 close (bus_pid_to_babysitter_pipe[WRITE_END]);
1077 /* babysit() will fork *again*
1078 * and will also reap the pre-forked bus
1081 babysit (exit_with_session, ret,
1082 bus_pid_to_babysitter_pipe[READ_END]);
1086 verbose ("=== Bus exec process created\n");
1088 /* Now we are the bus process (well, almost;
1089 * dbus-daemon itself forks again)
1091 close (bus_pid_to_launcher_pipe[READ_END]);
1092 close (bus_address_to_launcher_pipe[READ_END]);
1093 close (bus_pid_to_babysitter_pipe[READ_END]);
1094 close (bus_pid_to_babysitter_pipe[WRITE_END]);
1096 sprintf (write_pid_fd_as_string,
1097 "%d", bus_pid_to_launcher_pipe[WRITE_END]);
1099 sprintf (write_address_fd_as_string,
1100 "%d", bus_address_to_launcher_pipe[WRITE_END]);
1102 verbose ("Calling exec()\n");
1104 #ifdef DBUS_BUILD_TESTS
1105 /* exec from testdir */
1106 if (getenv("DBUS_USE_TEST_BINARY") != NULL)
1108 execl (TEST_BUS_BINARY,
1111 "--print-pid", write_pid_fd_as_string,
1112 "--print-address", write_address_fd_as_string,
1113 config_file ? "--config-file" : "--session",
1114 config_file, /* has to be last in this varargs list */
1118 "Failed to execute test message bus daemon %s: %s. Will try again with the system path.\n",
1119 TEST_BUS_BINARY, strerror (errno));
1121 #endif /* DBUS_BUILD_TESTS */
1123 execl (DBUS_DAEMONDIR"/dbus-daemon",
1124 DBUS_DAEMONDIR"/dbus-daemon",
1126 "--print-pid", write_pid_fd_as_string,
1127 "--print-address", write_address_fd_as_string,
1128 config_file ? "--config-file" : "--session",
1129 config_file, /* has to be last in this varargs list */
1133 "Failed to execute message bus daemon %s: %s. Will try again without full path.\n",
1134 DBUS_DAEMONDIR"/dbus-daemon", strerror (errno));
1137 * If it failed, try running without full PATH. Note this is needed
1138 * because the build process builds the run-with-tmp-session-bus.conf
1139 * file and the dbus-daemon will not be in the install location during
1142 execlp ("dbus-daemon",
1145 "--print-pid", write_pid_fd_as_string,
1146 "--print-address", write_address_fd_as_string,
1147 config_file ? "--config-file" : "--session",
1148 config_file, /* has to be last in this varargs list */
1152 "Failed to execute message bus daemon: %s\n",
1159 #define MAX_PID_LEN 64
1161 char bus_address[MAX_ADDR_LEN];
1162 char buf[MAX_PID_LEN];
1167 verbose ("=== Parent dbus-launch continues\n");
1169 close (bus_pid_to_launcher_pipe[WRITE_END]);
1170 close (bus_address_to_launcher_pipe[WRITE_END]);
1171 close (bus_pid_to_babysitter_pipe[READ_END]);
1173 verbose ("Waiting for babysitter's intermediate parent\n");
1175 /* Immediately reap parent of babysitter
1176 * (which was created just for us to reap)
1178 if (do_waitpid (ret) < 0)
1180 fprintf (stderr, "Failed to waitpid() for babysitter intermediate process: %s\n",
1185 verbose ("Reading address from bus\n");
1187 /* Read the pipe data, print, and exit */
1188 switch (read_line (bus_address_to_launcher_pipe[READ_END],
1189 bus_address, MAX_ADDR_LEN))
1191 case READ_STATUS_OK:
1193 case READ_STATUS_EOF:
1194 fprintf (stderr, "EOF in dbus-launch reading address from bus daemon\n");
1197 case READ_STATUS_ERROR:
1198 fprintf (stderr, "Error in dbus-launch reading address from bus daemon: %s\n",
1204 close (bus_address_to_launcher_pipe[READ_END]);
1206 verbose ("Reading PID from daemon\n");
1208 switch (read_line (bus_pid_to_launcher_pipe[READ_END], buf, MAX_PID_LEN))
1210 case READ_STATUS_OK:
1212 case READ_STATUS_EOF:
1213 fprintf (stderr, "EOF reading PID from bus daemon\n");
1216 case READ_STATUS_ERROR:
1217 fprintf (stderr, "Error reading PID from bus daemon: %s\n",
1224 val = strtol (buf, &end, 0);
1225 if (buf == end || end == NULL)
1227 fprintf (stderr, "Failed to parse bus PID \"%s\": %s\n",
1228 buf, strerror (errno));
1234 close (bus_pid_to_launcher_pipe[READ_END]);
1236 #ifdef DBUS_ENABLE_X11_AUTOLAUNCH
1237 if (xdisplay != NULL)
1241 verbose("Saving x11 address\n");
1242 ret2 = x11_save_address (bus_address, bus_pid, &wid);
1243 /* Only get an existing dbus session when autolaunching */
1248 char *address = NULL;
1249 /* another window got added. Return its address */
1250 bus_pid_to_kill = bus_pid;
1251 if (x11_get_address (&address, &bus_pid, &wid)
1254 verbose ("dbus-daemon is already running. Returning existing parameters.\n");
1255 /* Kill the old bus */
1257 pass_info (runprog, address, bus_pid, wid,
1258 c_shell_syntax, bourne_shell_syntax, binary_syntax,
1259 argc, argv, remaining_args);
1264 fprintf (stderr, "Error saving bus information.\n");
1265 bus_pid_to_kill = bus_pid;
1266 kill_bus_and_exit (1);
1272 /* Forward the pid to the babysitter */
1273 write_pid (bus_pid_to_babysitter_pipe[WRITE_END], bus_pid);
1274 close (bus_pid_to_babysitter_pipe[WRITE_END]);
1276 pass_info (runprog, bus_address, bus_pid, wid, c_shell_syntax,
1277 bourne_shell_syntax, binary_syntax, argc, argv, remaining_args);