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]"
186 " [--csh-syntax] [--auto-syntax] [--binary-syntax] [--close-stderr]"
187 " [--exit-with-session] [--autolaunch=MACHINEID]"
188 " [--config-file=FILENAME] [PROGRAM] [ARGS...]\n");
195 printf ("D-Bus Message Bus Launcher %s\n"
196 "Copyright (C) 2003 Red Hat, Inc.\n"
197 "This is free software; see the source for copying conditions.\n"
198 "There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n",
204 xstrdup (const char *str)
214 copy = malloc (len + 1);
218 memcpy (copy, str, len + 1);
225 READ_STATUS_OK, /**< Read succeeded */
226 READ_STATUS_ERROR, /**< Some kind of error */
227 READ_STATUS_EOF /**< EOF returned */
238 memset (buf, '\0', maxlen);
239 maxlen -= 1; /* ensure nul term */
241 retval = READ_STATUS_OK;
249 to_read = maxlen - bytes;
257 if (chunk < 0 && errno == EINTR)
262 retval = READ_STATUS_ERROR;
267 retval = READ_STATUS_EOF;
274 if (retval == READ_STATUS_EOF &&
276 retval = READ_STATUS_OK;
279 if (retval != READ_STATUS_ERROR &&
281 buf[bytes-1] == '\n')
294 retval = READ_STATUS_OK;
302 to_read = sizeof (pid_t) - bytes;
308 ((char*)buf) + bytes,
310 if (chunk < 0 && errno == EINTR)
315 retval = READ_STATUS_ERROR;
320 retval = READ_STATUS_EOF;
331 do_write (int fd, const void *buf, size_t count)
333 size_t bytes_written;
340 ret = write (fd, ((const char*)buf) + bytes_written, count - bytes_written);
348 fprintf (stderr, "Failed to write data to pipe! %s\n",
350 exit (1); /* give up, we suck */
354 bytes_written += ret;
356 if (bytes_written < count)
364 do_write (fd, &pid, sizeof (pid));
368 do_waitpid (pid_t pid)
373 ret = waitpid (pid, NULL, 0);
382 static pid_t bus_pid_to_kill = -1;
387 verbose ("Killing message bus and exiting babysitter\n");
388 kill (bus_pid_to_kill, SIGTERM);
390 kill (bus_pid_to_kill, SIGKILL);
394 kill_bus_and_exit (int exitcode)
396 /* in case these point to any NFS mounts, get rid of them immediately */
407 print_variables (const char *bus_address, pid_t bus_pid, long bus_wid,
408 int c_shell_syntax, int bourne_shell_syntax,
413 do_write (1, bus_address, strlen (bus_address) + 1);
414 do_write (1, &bus_pid, sizeof bus_pid);
415 do_write (1, &bus_wid, sizeof bus_wid);
418 else if (c_shell_syntax)
420 printf ("setenv DBUS_SESSION_BUS_ADDRESS '%s';\n", bus_address);
421 printf ("set DBUS_SESSION_BUS_PID=%ld;\n", (long) bus_pid);
423 printf ("set DBUS_SESSION_BUS_WINDOWID=%ld;\n", (long) bus_wid);
426 else if (bourne_shell_syntax)
428 printf ("DBUS_SESSION_BUS_ADDRESS='%s';\n", bus_address);
429 printf ("export DBUS_SESSION_BUS_ADDRESS;\n");
430 printf ("DBUS_SESSION_BUS_PID=%ld;\n", (long) bus_pid);
432 printf ("DBUS_SESSION_BUS_WINDOWID=%ld;\n", (long) bus_wid);
437 printf ("DBUS_SESSION_BUS_ADDRESS=%s\n", bus_address);
438 printf ("DBUS_SESSION_BUS_PID=%ld\n", (long) bus_pid);
440 printf ("DBUS_SESSION_BUS_WINDOWID=%ld\n", (long) bus_wid);
445 static int got_sighup = FALSE;
448 signal_handler (int sig)
463 kill_bus_when_session_ends (void)
469 struct sigaction act;
472 /* install SIGHUP handler */
474 sigemptyset (&empty_mask);
475 act.sa_handler = signal_handler;
476 act.sa_mask = empty_mask;
478 sigaction (SIGHUP, &act, NULL);
479 sigaction (SIGTERM, &act, NULL);
480 sigaction (SIGINT, &act, NULL);
482 #ifdef DBUS_BUILD_X11
484 if (xdisplay != NULL)
486 x_fd = ConnectionNumber (xdisplay);
501 verbose ("session lifetime is defined by X, not monitoring stdin\n");
504 else if (tty_fd >= 0)
506 verbose ("stdin isatty(), monitoring it\n");
510 verbose ("stdin was not a TTY, not monitoring it\n");
513 if (tty_fd < 0 && x_fd < 0)
515 fprintf (stderr, "No terminal on standard input and no X display; cannot attach message bus to session lifetime\n");
521 #ifdef DBUS_BUILD_X11
522 /* Dump events on the floor, and let
523 * IO error handler run if we lose
524 * the X connection. It's important to
525 * run this before going into select() since
526 * we might have queued outgoing messages or
537 FD_SET (tty_fd, &read_set);
538 FD_SET (tty_fd, &err_set);
543 FD_SET (x_fd, &read_set);
544 FD_SET (x_fd, &err_set);
547 select (MAX (tty_fd, x_fd) + 1,
548 &read_set, NULL, &err_set, NULL);
552 verbose ("Got SIGHUP, exiting\n");
553 kill_bus_and_exit (0);
556 #ifdef DBUS_BUILD_X11
557 /* Events will be processed before we select again
560 verbose ("X fd condition reading = %d error = %d\n",
561 FD_ISSET (x_fd, &read_set),
562 FD_ISSET (x_fd, &err_set));
567 if (FD_ISSET (tty_fd, &read_set))
572 verbose ("TTY ready for reading\n");
574 bytes_read = read (tty_fd, discard, sizeof (discard));
576 verbose ("Read %d bytes from TTY errno = %d\n",
580 kill_bus_and_exit (0); /* EOF */
581 else if (bytes_read < 0 && errno != EINTR)
583 /* This shouldn't happen I don't think; to avoid
584 * spinning on the fd forever we exit.
586 fprintf (stderr, "dbus-launch: error reading from stdin: %s\n",
588 kill_bus_and_exit (0);
591 else if (FD_ISSET (tty_fd, &err_set))
593 verbose ("TTY has error condition\n");
595 kill_bus_and_exit (0);
602 babysit (int exit_with_session,
604 int read_bus_pid_fd) /* read pid from here */
610 verbose ("babysitting, exit_with_session = %d, child_pid = %ld, read_bus_pid_fd = %d\n",
611 exit_with_session, (long) child_pid, read_bus_pid_fd);
613 /* We chdir ("/") since we are persistent and daemon-like, and fork
614 * again so dbus-launch can reap the parent. However, we don't
615 * setsid() or close fd 0 because the idea is to remain attached
616 * to the tty and the X server in order to kill the message bus
617 * when the session ends.
622 fprintf (stderr, "Could not change to root directory: %s\n",
627 /* Close stdout/stderr so we don't block an "eval" or otherwise
628 * lock up. stdout is still chaining through to dbus-launch
629 * and in turn to the parent shell.
631 dev_null_fd = open ("/dev/null", O_RDWR);
632 if (dev_null_fd >= 0)
634 if (!exit_with_session)
635 dup2 (dev_null_fd, 0);
636 dup2 (dev_null_fd, 1);
637 s = getenv ("DBUS_DEBUG_OUTPUT");
638 if (s == NULL || *s == '\0')
639 dup2 (dev_null_fd, 2);
644 fprintf (stderr, "Failed to open /dev/null: %s\n",
646 /* continue, why not */
653 fprintf (stderr, "fork() failed in babysitter: %s\n",
660 /* Parent reaps pre-fork part of bus daemon, then exits and is
661 * reaped so the babysitter isn't a zombie
664 verbose ("=== Babysitter's intermediate parent continues again\n");
666 if (do_waitpid (child_pid) < 0)
668 /* shouldn't happen */
669 fprintf (stderr, "Failed waitpid() waiting for bus daemon's parent\n");
673 verbose ("Babysitter's intermediate parent exiting\n");
678 /* Child continues */
679 verbose ("=== Babysitter process created\n");
681 verbose ("Reading PID from bus\n");
683 switch (read_pid (read_bus_pid_fd, &bus_pid_to_kill))
687 case READ_STATUS_EOF:
688 fprintf (stderr, "EOF in dbus-launch reading PID from bus daemon\n");
691 case READ_STATUS_ERROR:
692 fprintf (stderr, "Error in dbus-launch reading PID from bus daemon: %s\n",
698 verbose ("Got PID %ld from daemon\n",
699 (long) bus_pid_to_kill);
701 if (exit_with_session)
703 /* Bus is now started and launcher has needed info;
704 * we connect to X display and tty and wait to
705 * kill bus if requested.
708 kill_bus_when_session_ends ();
711 verbose ("Babysitter exiting\n");
717 do_close_stderr (void)
723 /* dbus-launch is a Unix-only program, so we can rely on /dev/null being there.
724 * We're including unistd.h and we're dealing with sh/csh launch sequences...
726 fd = open ("/dev/null", O_RDWR);
729 fprintf (stderr, "Internal error: cannot open /dev/null: %s", strerror (errno));
734 if (dup2 (fd, 2) == -1)
736 /* error; we can't report an error anymore... */
743 pass_info (const char *runprog, const char *bus_address, pid_t bus_pid,
744 long bus_wid, int c_shell_syntax, int bourne_shell_syntax,
746 int argc, char **argv, int remaining_args)
755 envvar = malloc (strlen ("DBUS_SESSION_BUS_ADDRESS=") +
756 strlen (bus_address) + 1);
757 args = malloc (sizeof (char *) * ((argc-remaining_args)+2));
759 if (envvar == NULL || args == NULL)
762 args[0] = xstrdup (runprog);
765 for (i = 1; i <= (argc-remaining_args); i++)
767 size_t len = strlen (argv[remaining_args+i-1])+1;
768 args[i] = malloc (len);
771 strncpy (args[i], argv[remaining_args+i-1], len);
775 strcpy (envvar, "DBUS_SESSION_BUS_ADDRESS=");
776 strcat (envvar, bus_address);
779 execvp (runprog, args);
780 fprintf (stderr, "Couldn't exec %s: %s\n", runprog, strerror (errno));
785 print_variables (bus_address, bus_pid, bus_wid, c_shell_syntax,
786 bourne_shell_syntax, binary_syntax);
788 verbose ("dbus-launch exiting\n");
802 fprintf (stderr, "Out of memory!");
810 main (int argc, char **argv)
812 const char *prev_arg;
814 const char *runprog = NULL;
815 int remaining_args = 0;
816 int exit_with_session;
817 int binary_syntax = FALSE;
818 int c_shell_syntax = FALSE;
819 int bourne_shell_syntax = FALSE;
820 int auto_shell_syntax = FALSE;
821 int autolaunch = FALSE;
822 int requires_arg = FALSE;
823 int close_stderr = FALSE;
826 int bus_pid_to_launcher_pipe[2];
827 int bus_pid_to_babysitter_pipe[2];
828 int bus_address_to_launcher_pipe[2];
831 exit_with_session = FALSE;
838 const char *arg = argv[i];
840 if (strcmp (arg, "--help") == 0 ||
841 strcmp (arg, "-h") == 0 ||
842 strcmp (arg, "-?") == 0)
844 else if (strcmp (arg, "--auto-syntax") == 0)
845 auto_shell_syntax = TRUE;
846 else if (strcmp (arg, "-c") == 0 ||
847 strcmp (arg, "--csh-syntax") == 0)
848 c_shell_syntax = TRUE;
849 else if (strcmp (arg, "-s") == 0 ||
850 strcmp (arg, "--sh-syntax") == 0)
851 bourne_shell_syntax = TRUE;
852 else if (strcmp (arg, "--binary-syntax") == 0)
853 binary_syntax = TRUE;
854 else if (strcmp (arg, "--version") == 0)
856 else if (strcmp (arg, "--exit-with-session") == 0)
857 exit_with_session = TRUE;
858 else if (strcmp (arg, "--close-stderr") == 0)
860 else if (strstr (arg, "--autolaunch=") == arg)
866 fprintf (stderr, "--autolaunch given twice\n");
872 s = strchr (arg, '=');
875 save_machine_uuid (s);
878 strcmp (prev_arg, "--autolaunch") == 0)
882 fprintf (stderr, "--autolaunch given twice\n");
888 save_machine_uuid (arg);
889 requires_arg = FALSE;
891 else if (strcmp (arg, "--autolaunch") == 0)
893 else if (strstr (arg, "--config-file=") == arg)
897 if (config_file != NULL)
899 fprintf (stderr, "--config-file given twice\n");
903 file = strchr (arg, '=');
906 config_file = xstrdup (file);
909 strcmp (prev_arg, "--config-file") == 0)
911 if (config_file != NULL)
913 fprintf (stderr, "--config-file given twice\n");
917 config_file = xstrdup (arg);
918 requires_arg = FALSE;
920 else if (strcmp (arg, "--config-file") == 0)
922 else if (arg[0] == '-')
924 if (strcmp (arg, "--") != 0)
926 fprintf (stderr, "Option `%s' is unknown.\n", arg);
932 remaining_args = i+2;
939 remaining_args = i+1;
949 fprintf (stderr, "Option `%s' requires an argument.\n", prev_arg);
953 if (auto_shell_syntax)
955 if ((shname = getenv ("SHELL")) != NULL)
957 if (!strncmp (shname + strlen (shname) - 3, "csh", 3))
958 c_shell_syntax = TRUE;
960 bourne_shell_syntax = TRUE;
963 bourne_shell_syntax = TRUE;
966 if (exit_with_session)
967 verbose ("--exit-with-session enabled\n");
971 #ifndef DBUS_BUILD_X11
972 fprintf (stderr, "Autolaunch requested, but X11 support not compiled in.\n"
973 "Cannot continue.\n");
975 #else /* DBUS_BUILD_X11 */
976 #ifndef DBUS_ENABLE_X11_AUTOLAUNCH
977 fprintf (stderr, "X11 autolaunch support disabled at compile time.\n");
979 #else /* DBUS_ENABLE_X11_AUTOLAUNCH */
984 if (get_machine_uuid () == NULL)
986 fprintf (stderr, "Machine UUID not provided as arg to --autolaunch\n");
990 verbose ("Autolaunch enabled (using X11).\n");
991 if (!exit_with_session)
993 verbose ("--exit-with-session automatically enabled\n");
994 exit_with_session = TRUE;
999 fprintf (stderr, "Autolaunch error: X11 initialization failed.\n");
1003 if (!x11_get_address (&address, &pid, &wid))
1005 fprintf (stderr, "Autolaunch error: X11 communication error.\n");
1009 if (address != NULL)
1011 verbose ("dbus-daemon is already running. Returning existing parameters.\n");
1012 pass_info (runprog, address, pid, wid, c_shell_syntax,
1013 bourne_shell_syntax, binary_syntax, argc, argv, remaining_args);
1016 #endif /* DBUS_ENABLE_X11_AUTOLAUNCH */
1018 else if (read_machine_uuid_if_needed())
1021 #endif /* DBUS_BUILD_X11 */
1025 if (pipe (bus_pid_to_launcher_pipe) < 0 ||
1026 pipe (bus_address_to_launcher_pipe) < 0 ||
1027 pipe (bus_pid_to_babysitter_pipe) < 0)
1030 "Failed to create pipe: %s\n",
1038 fprintf (stderr, "Failed to fork: %s\n",
1046 #define MAX_FD_LEN 64
1047 char write_pid_fd_as_string[MAX_FD_LEN];
1048 char write_address_fd_as_string[MAX_FD_LEN];
1050 #ifdef DBUS_BUILD_X11
1057 verbose ("=== Babysitter's intermediate parent created\n");
1059 /* Fork once more to create babysitter */
1064 fprintf (stderr, "Failed to fork: %s\n",
1072 verbose ("=== Babysitter's intermediate parent continues\n");
1074 close (bus_pid_to_launcher_pipe[READ_END]);
1075 close (bus_pid_to_launcher_pipe[WRITE_END]);
1076 close (bus_address_to_launcher_pipe[READ_END]);
1077 close (bus_address_to_launcher_pipe[WRITE_END]);
1078 close (bus_pid_to_babysitter_pipe[WRITE_END]);
1080 /* babysit() will fork *again*
1081 * and will also reap the pre-forked bus
1084 babysit (exit_with_session, ret,
1085 bus_pid_to_babysitter_pipe[READ_END]);
1089 verbose ("=== Bus exec process created\n");
1091 /* Now we are the bus process (well, almost;
1092 * dbus-daemon itself forks again)
1094 close (bus_pid_to_launcher_pipe[READ_END]);
1095 close (bus_address_to_launcher_pipe[READ_END]);
1096 close (bus_pid_to_babysitter_pipe[READ_END]);
1097 close (bus_pid_to_babysitter_pipe[WRITE_END]);
1099 sprintf (write_pid_fd_as_string,
1100 "%d", bus_pid_to_launcher_pipe[WRITE_END]);
1102 sprintf (write_address_fd_as_string,
1103 "%d", bus_address_to_launcher_pipe[WRITE_END]);
1105 verbose ("Calling exec()\n");
1107 #ifdef DBUS_BUILD_TESTS
1108 /* exec from testdir */
1109 if (getenv("DBUS_USE_TEST_BINARY") != NULL)
1111 execl (TEST_BUS_BINARY,
1114 "--print-pid", write_pid_fd_as_string,
1115 "--print-address", write_address_fd_as_string,
1116 config_file ? "--config-file" : "--session",
1117 config_file, /* has to be last in this varargs list */
1121 "Failed to execute test message bus daemon %s: %s. Will try again with the system path.\n",
1122 TEST_BUS_BINARY, strerror (errno));
1124 #endif /* DBUS_BUILD_TESTS */
1126 execl (DBUS_DAEMONDIR"/dbus-daemon",
1127 DBUS_DAEMONDIR"/dbus-daemon",
1129 "--print-pid", write_pid_fd_as_string,
1130 "--print-address", write_address_fd_as_string,
1131 config_file ? "--config-file" : "--session",
1132 config_file, /* has to be last in this varargs list */
1136 "Failed to execute message bus daemon %s: %s. Will try again without full path.\n",
1137 DBUS_DAEMONDIR"/dbus-daemon", strerror (errno));
1140 * If it failed, try running without full PATH. Note this is needed
1141 * because the build process builds the run-with-tmp-session-bus.conf
1142 * file and the dbus-daemon will not be in the install location during
1145 execlp ("dbus-daemon",
1148 "--print-pid", write_pid_fd_as_string,
1149 "--print-address", write_address_fd_as_string,
1150 config_file ? "--config-file" : "--session",
1151 config_file, /* has to be last in this varargs list */
1155 "Failed to execute message bus daemon: %s\n",
1162 #define MAX_PID_LEN 64
1164 char bus_address[MAX_ADDR_LEN];
1165 char buf[MAX_PID_LEN];
1170 verbose ("=== Parent dbus-launch continues\n");
1172 close (bus_pid_to_launcher_pipe[WRITE_END]);
1173 close (bus_address_to_launcher_pipe[WRITE_END]);
1174 close (bus_pid_to_babysitter_pipe[READ_END]);
1176 verbose ("Waiting for babysitter's intermediate parent\n");
1178 /* Immediately reap parent of babysitter
1179 * (which was created just for us to reap)
1181 if (do_waitpid (ret) < 0)
1183 fprintf (stderr, "Failed to waitpid() for babysitter intermediate process: %s\n",
1188 verbose ("Reading address from bus\n");
1190 /* Read the pipe data, print, and exit */
1191 switch (read_line (bus_address_to_launcher_pipe[READ_END],
1192 bus_address, MAX_ADDR_LEN))
1194 case READ_STATUS_OK:
1196 case READ_STATUS_EOF:
1197 fprintf (stderr, "EOF in dbus-launch reading address from bus daemon\n");
1200 case READ_STATUS_ERROR:
1201 fprintf (stderr, "Error in dbus-launch reading address from bus daemon: %s\n",
1207 close (bus_address_to_launcher_pipe[READ_END]);
1209 verbose ("Reading PID from daemon\n");
1211 switch (read_line (bus_pid_to_launcher_pipe[READ_END], buf, MAX_PID_LEN))
1213 case READ_STATUS_OK:
1215 case READ_STATUS_EOF:
1216 fprintf (stderr, "EOF reading PID from bus daemon\n");
1219 case READ_STATUS_ERROR:
1220 fprintf (stderr, "Error reading PID from bus daemon: %s\n",
1227 val = strtol (buf, &end, 0);
1228 if (buf == end || end == NULL)
1230 fprintf (stderr, "Failed to parse bus PID \"%s\": %s\n",
1231 buf, strerror (errno));
1237 close (bus_pid_to_launcher_pipe[READ_END]);
1239 #ifdef DBUS_ENABLE_X11_AUTOLAUNCH
1240 if (xdisplay != NULL)
1244 verbose("Saving x11 address\n");
1245 ret2 = x11_save_address (bus_address, bus_pid, &wid);
1246 /* Only get an existing dbus session when autolaunching */
1251 char *address = NULL;
1252 /* another window got added. Return its address */
1253 bus_pid_to_kill = bus_pid;
1254 if (x11_get_address (&address, &bus_pid, &wid)
1257 verbose ("dbus-daemon is already running. Returning existing parameters.\n");
1258 /* Kill the old bus */
1260 pass_info (runprog, address, bus_pid, wid,
1261 c_shell_syntax, bourne_shell_syntax, binary_syntax,
1262 argc, argv, remaining_args);
1267 fprintf (stderr, "Error saving bus information.\n");
1268 bus_pid_to_kill = bus_pid;
1269 kill_bus_and_exit (1);
1275 /* Forward the pid to the babysitter */
1276 write_pid (bus_pid_to_babysitter_pipe[WRITE_END], bus_pid);
1277 close (bus_pid_to_babysitter_pipe[WRITE_END]);
1279 pass_info (runprog, bus_address, bus_pid, wid, c_shell_syntax,
1280 bourne_shell_syntax, binary_syntax, argc, argv, remaining_args);