1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* dbus-spawn.c Wrapper around fork/exec
4 * Copyright (C) 2002, 2003 Red Hat, Inc.
5 * Copyright (C) 2003 CodeFactory AB
7 * Licensed under the Academic Free License version 1.2
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
24 #include "dbus-spawn.h"
25 #include "dbus-sysdeps.h"
26 #include "dbus-internals.h"
27 #include "dbus-test.h"
36 * @addtogroup DBusInternalsUtils
41 * I'm pretty sure this whole spawn file could be made simpler,
42 * if you thought about it a bit.
46 * Enumeration for status of a read()
50 READ_STATUS_OK, /**< Read succeeded */
51 READ_STATUS_ERROR, /**< Some kind of error */
52 READ_STATUS_EOF /**< EOF returned */
65 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
67 retval = READ_STATUS_OK;
76 to_read = sizeof (int) * n_ints_in_buf - bytes;
85 if (chunk < 0 && errno == EINTR)
90 dbus_set_error (error,
91 DBUS_ERROR_SPAWN_FAILED,
92 "Failed to read from child pipe (%s)",
93 _dbus_strerror (errno));
95 retval = READ_STATUS_ERROR;
100 retval = READ_STATUS_EOF;
107 *n_ints_read = (int)(bytes / sizeof(int));
120 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
122 retval = READ_STATUS_OK;
130 to_read = sizeof (pid_t) - bytes;
136 ((char*)buf) + bytes,
138 if (chunk < 0 && errno == EINTR)
143 dbus_set_error (error,
144 DBUS_ERROR_SPAWN_FAILED,
145 "Failed to read from child pipe (%s)",
146 _dbus_strerror (errno));
148 retval = READ_STATUS_ERROR;
153 retval = READ_STATUS_EOF;
163 /* The implementation uses an intermediate child between the main process
164 * and the grandchild. The grandchild is our spawned process. The intermediate
165 * child is a babysitter process; it keeps track of when the grandchild
166 * exits/crashes, and reaps the grandchild.
169 /* Messages from children to parents */
172 CHILD_EXITED, /* This message is followed by the exit status int */
173 CHILD_FORK_FAILED, /* Followed by errno */
174 CHILD_EXEC_FAILED, /* Followed by errno */
175 CHILD_PID /* Followed by pid_t */
178 struct DBusBabysitter
182 char *executable; /**< executable name to use in error messages */
184 int socket_to_babysitter;
185 int error_pipe_from_child;
188 pid_t grandchild_pid;
190 DBusWatchList *watches;
192 DBusWatch *error_watch;
193 DBusWatch *sitter_watch;
197 unsigned int have_child_status : 1;
198 unsigned int have_fork_errnum : 1;
199 unsigned int have_exec_errnum : 1;
202 static DBusBabysitter*
203 _dbus_babysitter_new (void)
205 DBusBabysitter *sitter;
207 sitter = dbus_new0 (DBusBabysitter, 1);
211 sitter->refcount = 1;
213 sitter->socket_to_babysitter = -1;
214 sitter->error_pipe_from_child = -1;
216 sitter->sitter_pid = -1;
217 sitter->grandchild_pid = -1;
219 sitter->watches = _dbus_watch_list_new ();
220 if (sitter->watches == NULL)
226 _dbus_babysitter_unref (sitter);
231 * Increment the reference count on the babysitter object.
233 * @param sitter the babysitter
236 _dbus_babysitter_ref (DBusBabysitter *sitter)
238 _dbus_assert (sitter != NULL);
239 _dbus_assert (sitter->refcount > 0);
241 sitter->refcount += 1;
245 * Decrement the reference count on the babysitter object.
247 * @param sitter the babysitter
250 _dbus_babysitter_unref (DBusBabysitter *sitter)
252 _dbus_assert (sitter != NULL);
253 _dbus_assert (sitter->refcount > 0);
255 sitter->refcount -= 1;
256 if (sitter->refcount == 0)
258 if (sitter->socket_to_babysitter >= 0)
260 close (sitter->socket_to_babysitter);
261 sitter->socket_to_babysitter = -1;
264 if (sitter->error_pipe_from_child >= 0)
266 close (sitter->error_pipe_from_child);
267 sitter->error_pipe_from_child = -1;
270 if (sitter->sitter_pid != -1)
275 /* Reap the babysitter */
277 ret = waitpid (sitter->sitter_pid, &status, 0);
282 else if (errno == ECHILD)
283 _dbus_warn ("Babysitter process not available to be reaped; should not happen\n");
285 _dbus_warn ("Unexpected error %d in waitpid() for babysitter: %s\n",
286 errno, _dbus_strerror (errno));
290 _dbus_verbose ("Reaped %ld, waiting for babysitter %ld\n",
291 (long) ret, (long) sitter->sitter_pid);
293 if (WIFEXITED (sitter->status))
294 _dbus_verbose ("Babysitter exited with status %d\n",
295 WEXITSTATUS (sitter->status));
296 else if (WIFSIGNALED (sitter->status))
297 _dbus_verbose ("Babysitter received signal %d\n",
298 WTERMSIG (sitter->status));
300 _dbus_verbose ("Babysitter exited abnormally\n");
303 sitter->sitter_pid = -1;
306 if (sitter->error_watch)
308 _dbus_watch_invalidate (sitter->error_watch);
309 _dbus_watch_unref (sitter->error_watch);
310 sitter->error_watch = NULL;
313 if (sitter->sitter_watch)
315 _dbus_watch_invalidate (sitter->sitter_watch);
316 _dbus_watch_unref (sitter->sitter_watch);
317 sitter->sitter_watch = NULL;
321 _dbus_watch_list_free (sitter->watches);
323 dbus_free (sitter->executable);
330 read_data (DBusBabysitter *sitter,
338 dbus_error_init (&error);
340 r = read_ints (fd, &what, 1, &got, &error);
344 case READ_STATUS_ERROR:
345 _dbus_warn ("Failed to read data from fd %d: %s\n", fd, error.message);
346 dbus_error_free (&error);
349 case READ_STATUS_EOF:
361 case CHILD_FORK_FAILED:
362 case CHILD_EXEC_FAILED:
366 r = read_ints (fd, &arg, 1, &got, &error);
370 case READ_STATUS_ERROR:
371 _dbus_warn ("Failed to read arg from fd %d: %s\n", fd, error.message);
372 dbus_error_free (&error);
374 case READ_STATUS_EOF:
382 if (what == CHILD_EXITED)
384 sitter->have_child_status = TRUE;
385 sitter->status = arg;
386 _dbus_verbose ("recorded child status exited = %d signaled = %d exitstatus = %d termsig = %d\n",
387 WIFEXITED (sitter->status), WIFSIGNALED (sitter->status),
388 WEXITSTATUS (sitter->status), WTERMSIG (sitter->status));
390 else if (what == CHILD_FORK_FAILED)
392 sitter->have_fork_errnum = TRUE;
393 sitter->errnum = arg;
394 _dbus_verbose ("recorded fork errnum %d\n", sitter->errnum);
396 else if (what == CHILD_EXEC_FAILED)
398 sitter->have_exec_errnum = TRUE;
399 sitter->errnum = arg;
400 _dbus_verbose ("recorded exec errnum %d\n", sitter->errnum);
409 r = read_pid (fd, &pid, &error);
413 case READ_STATUS_ERROR:
414 _dbus_warn ("Failed to read PID from fd %d: %s\n", fd, error.message);
415 dbus_error_free (&error);
417 case READ_STATUS_EOF:
423 sitter->grandchild_pid = pid;
425 _dbus_verbose ("recorded grandchild pid %d\n", sitter->grandchild_pid);
429 _dbus_warn ("Unknown message received from babysitter process\n");
438 close_socket_to_babysitter (DBusBabysitter *sitter)
440 _dbus_verbose ("Closing babysitter\n");
441 close (sitter->socket_to_babysitter);
442 sitter->socket_to_babysitter = -1;
446 close_error_pipe_from_child (DBusBabysitter *sitter)
448 _dbus_verbose ("Closing child error\n");
449 close (sitter->error_pipe_from_child);
450 sitter->error_pipe_from_child = -1;
454 handle_babysitter_socket (DBusBabysitter *sitter,
457 /* Even if we have POLLHUP, we want to keep reading
458 * data until POLLIN goes away; so this function only
459 * looks at HUP/ERR if no IN is set.
461 if (revents & _DBUS_POLLIN)
463 _dbus_verbose ("Reading data from babysitter\n");
464 if (read_data (sitter, sitter->socket_to_babysitter) != READ_STATUS_OK)
465 close_socket_to_babysitter (sitter);
467 else if (revents & (_DBUS_POLLERR | _DBUS_POLLHUP))
469 close_socket_to_babysitter (sitter);
474 handle_error_pipe (DBusBabysitter *sitter,
477 if (revents & _DBUS_POLLIN)
479 _dbus_verbose ("Reading data from child error\n");
480 if (read_data (sitter, sitter->error_pipe_from_child) != READ_STATUS_OK)
481 close_error_pipe_from_child (sitter);
483 else if (revents & (_DBUS_POLLERR | _DBUS_POLLHUP))
485 close_error_pipe_from_child (sitter);
489 /* returns whether there were any poll events handled */
491 babysitter_iteration (DBusBabysitter *sitter,
496 dbus_bool_t descriptors_ready;
498 descriptors_ready = FALSE;
502 if (sitter->error_pipe_from_child >= 0)
504 fds[i].fd = sitter->error_pipe_from_child;
505 fds[i].events = _DBUS_POLLIN;
510 if (sitter->socket_to_babysitter >= 0)
512 fds[i].fd = sitter->socket_to_babysitter;
513 fds[i].events = _DBUS_POLLIN;
522 ret = _dbus_poll (fds, i, 0);
523 if (ret == 0 && block)
524 ret = _dbus_poll (fds, i, -1);
528 descriptors_ready = TRUE;
533 if (fds[i].fd == sitter->error_pipe_from_child)
534 handle_error_pipe (sitter, fds[i].revents);
535 else if (fds[i].fd == sitter->socket_to_babysitter)
536 handle_babysitter_socket (sitter, fds[i].revents);
541 return descriptors_ready;
545 * Macro returns #TRUE if the babysitter still has live sockets open to the
546 * babysitter child or the grandchild.
548 #define LIVE_CHILDREN(sitter) ((sitter)->socket_to_babysitter >= 0 || (sitter)->error_pipe_from_child >= 0)
551 * Blocks until the babysitter process gives us the PID of the spawned grandchild,
552 * then kills the spawned grandchild.
554 * @param sitter the babysitter object
557 _dbus_babysitter_kill_child (DBusBabysitter *sitter)
559 /* be sure we have the PID of the child */
560 while (LIVE_CHILDREN (sitter) &&
561 sitter->grandchild_pid == -1)
562 babysitter_iteration (sitter, TRUE);
564 _dbus_verbose ("Got child PID %ld for killing\n",
565 (long) sitter->grandchild_pid);
567 if (sitter->grandchild_pid == -1)
568 return; /* child is already dead, or we're so hosed we'll never recover */
570 kill (sitter->grandchild_pid, SIGKILL);
574 * Checks whether the child has exited, without blocking.
576 * @param sitter the babysitter
579 _dbus_babysitter_get_child_exited (DBusBabysitter *sitter)
582 /* Be sure we're up-to-date */
583 while (LIVE_CHILDREN (sitter) &&
584 babysitter_iteration (sitter, FALSE))
587 /* We will have exited the babysitter when the child has exited */
588 return sitter->socket_to_babysitter < 0;
592 * Sets the #DBusError with an explanation of why the spawned
593 * child process exited (on a signal, or whatever). If
594 * the child process has not exited, does nothing (error
595 * will remain unset).
597 * @param sitter the babysitter
598 * @param error an error to fill in
601 _dbus_babysitter_set_child_exit_error (DBusBabysitter *sitter,
604 if (!_dbus_babysitter_get_child_exited (sitter))
607 /* Note that if exec fails, we will also get a child status
608 * from the babysitter saying the child exited,
609 * so we need to give priority to the exec error
611 if (sitter->have_exec_errnum)
613 dbus_set_error (error, DBUS_ERROR_SPAWN_EXEC_FAILED,
614 "Failed to execute program %s: %s",
615 sitter->executable, _dbus_strerror (sitter->errnum));
617 else if (sitter->have_fork_errnum)
619 dbus_set_error (error, DBUS_ERROR_NO_MEMORY,
620 "Failed to fork a new process %s: %s",
621 sitter->executable, _dbus_strerror (sitter->errnum));
623 else if (sitter->have_child_status)
625 if (WIFEXITED (sitter->status))
626 dbus_set_error (error, DBUS_ERROR_SPAWN_CHILD_EXITED,
627 "Process %s exited with status %d",
628 sitter->executable, WEXITSTATUS (sitter->status));
629 else if (WIFSIGNALED (sitter->status))
630 dbus_set_error (error, DBUS_ERROR_SPAWN_CHILD_SIGNALED,
631 "Process %s received signal %d",
632 sitter->executable, WTERMSIG (sitter->status));
634 dbus_set_error (error, DBUS_ERROR_FAILED,
635 "Process %s exited abnormally",
640 dbus_set_error (error, DBUS_ERROR_FAILED,
641 "Process %s exited, reason unknown",
647 * Sets watch functions to notify us when the
648 * babysitter object needs to read/write file descriptors.
650 * @param sitter the babysitter
651 * @param add_function function to begin monitoring a new descriptor.
652 * @param remove_function function to stop monitoring a descriptor.
653 * @param toggled_function function to notify when the watch is enabled/disabled
654 * @param data data to pass to add_function and remove_function.
655 * @param free_data_function function to be called to free the data.
656 * @returns #FALSE on failure (no memory)
659 _dbus_babysitter_set_watch_functions (DBusBabysitter *sitter,
660 DBusAddWatchFunction add_function,
661 DBusRemoveWatchFunction remove_function,
662 DBusWatchToggledFunction toggled_function,
664 DBusFreeFunction free_data_function)
666 return _dbus_watch_list_set_functions (sitter->watches,
675 handle_watch (DBusWatch *watch,
676 unsigned int condition,
679 DBusBabysitter *sitter = data;
684 if (condition & DBUS_WATCH_READABLE)
685 revents |= _DBUS_POLLIN;
686 if (condition & DBUS_WATCH_ERROR)
687 revents |= _DBUS_POLLERR;
688 if (condition & DBUS_WATCH_HANGUP)
689 revents |= _DBUS_POLLHUP;
691 fd = dbus_watch_get_fd (watch);
693 if (fd == sitter->error_pipe_from_child)
694 handle_error_pipe (sitter, revents);
695 else if (fd == sitter->socket_to_babysitter)
696 handle_babysitter_socket (sitter, revents);
698 while (LIVE_CHILDREN (sitter) &&
699 babysitter_iteration (sitter, FALSE))
705 /** Helps remember which end of the pipe is which */
707 /** Helps remember which end of the pipe is which */
711 /* Avoids a danger in threaded situations (calling close()
712 * on a file descriptor twice, and another thread has
713 * re-opened it since the first close)
716 close_and_invalidate (int *fd)
735 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
739 dbus_set_error (error,
740 DBUS_ERROR_SPAWN_FAILED,
741 "Failed to create pipe for communicating with child process (%s)",
742 _dbus_strerror (errno));
750 do_write (int fd, const void *buf, size_t count)
752 size_t bytes_written;
759 ret = write (fd, ((const char*)buf) + bytes_written, count - bytes_written);
767 _dbus_warn ("Failed to write data to pipe!\n");
768 _exit (1); /* give up, we suck */
772 bytes_written += ret;
774 if (bytes_written < count)
779 write_err_and_exit (int fd, int msg)
783 do_write (fd, &msg, sizeof (msg));
784 do_write (fd, &en, sizeof (en));
790 write_pid (int fd, pid_t pid)
794 do_write (fd, &msg, sizeof (msg));
795 do_write (fd, &pid, sizeof (pid));
799 write_status_and_exit (int fd, int status)
801 int msg = CHILD_EXITED;
803 do_write (fd, &msg, sizeof (msg));
804 do_write (fd, &status, sizeof (status));
810 do_exec (int child_err_report_fd,
812 DBusSpawnChildSetupFunc child_setup,
815 #ifdef DBUS_BUILD_TESTS
819 _dbus_verbose_reset ();
820 _dbus_verbose ("Child process has PID %lu\n",
824 (* child_setup) (user_data);
826 #ifdef DBUS_BUILD_TESTS
827 max_open = sysconf (_SC_OPEN_MAX);
829 for (i = 3; i < max_open; i++)
833 if (i == child_err_report_fd)
836 retval = fcntl (i, F_GETFD);
838 if (retval != -1 && !(retval & FD_CLOEXEC))
839 _dbus_warn ("Fd %d did not have the close-on-exec flag set!\n", i);
843 execv (argv[0], argv);
846 write_err_and_exit (child_err_report_fd,
851 check_babysit_events (pid_t grandchild_pid,
858 ret = waitpid (grandchild_pid, &status, WNOHANG);
862 _dbus_verbose ("no child exited\n");
864 ; /* no child exited */
868 /* This isn't supposed to happen. */
869 _dbus_warn ("unexpected waitpid() failure in check_babysit_events(): %s\n",
870 _dbus_strerror (errno));
873 else if (ret == grandchild_pid)
876 _dbus_verbose ("reaped child pid %ld\n", (long) ret);
878 write_status_and_exit (parent_pipe, status);
882 _dbus_warn ("waitpid() reaped pid %d that we've never heard of\n",
887 if (revents & _DBUS_POLLIN)
889 _dbus_verbose ("babysitter got POLLIN from parent pipe\n");
892 if (revents & (_DBUS_POLLERR | _DBUS_POLLHUP))
894 /* Parent is gone, so we just exit */
895 _dbus_verbose ("babysitter got POLLERR or POLLHUP from parent\n");
900 static int babysit_sigchld_pipe = -1;
903 babysit_signal_handler (int signo)
907 write (babysit_sigchld_pipe, &b, 1);
913 babysit (pid_t grandchild_pid,
918 /* We don't exec, so we keep parent state, such as the pid that
919 * _dbus_verbose() uses. Reset the pid here.
921 _dbus_verbose_reset ();
923 /* I thought SIGCHLD would just wake up the poll, but
924 * that didn't seem to work, so added this pipe.
925 * Probably the pipe is more likely to work on busted
926 * operating systems anyhow.
928 if (pipe (sigchld_pipe) < 0)
930 _dbus_warn ("Not enough file descriptors to create pipe in babysitter process\n");
934 babysit_sigchld_pipe = sigchld_pipe[WRITE_END];
936 _dbus_set_signal_handler (SIGCHLD, babysit_signal_handler);
938 write_pid (parent_pipe, grandchild_pid);
940 check_babysit_events (grandchild_pid, parent_pipe, 0);
946 pfds[0].fd = parent_pipe;
947 pfds[0].events = _DBUS_POLLIN;
950 pfds[1].fd = sigchld_pipe[READ_END];
951 pfds[1].events = _DBUS_POLLIN;
954 _dbus_poll (pfds, _DBUS_N_ELEMENTS (pfds), -1);
956 if (pfds[0].revents != 0)
958 check_babysit_events (grandchild_pid, parent_pipe, pfds[0].revents);
960 else if (pfds[1].revents & _DBUS_POLLIN)
963 read (sigchld_pipe[READ_END], &b, 1);
964 /* do waitpid check */
965 check_babysit_events (grandchild_pid, parent_pipe, 0);
973 * Spawns a new process. The executable name and argv[0]
974 * are the same, both are provided in argv[0]. The child_setup
975 * function is passed the given user_data and is run in the child
976 * just before calling exec().
978 * Also creates a "babysitter" which tracks the status of the
979 * child process, advising the parent if the child exits.
980 * If the spawn fails, no babysitter is created.
981 * If sitter_p is #NULL, no babysitter is kept.
983 * @param sitter_p return location for babysitter or #NULL
984 * @param argv the executable and arguments
985 * @param child_setup function to call in child pre-exec()
986 * @param user_data user data for setup function
987 * @param error error object to be filled in if function fails
988 * @returns #TRUE on success, #FALSE if error is filled in
991 _dbus_spawn_async_with_babysitter (DBusBabysitter **sitter_p,
993 DBusSpawnChildSetupFunc child_setup,
997 DBusBabysitter *sitter;
998 int child_err_report_pipe[2] = { -1, -1 };
999 int babysitter_pipe[2] = { -1, -1 };
1002 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1007 sitter = _dbus_babysitter_new ();
1010 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1014 sitter->executable = _dbus_strdup (argv[0]);
1015 if (sitter->executable == NULL)
1017 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1018 goto cleanup_and_fail;
1021 if (!make_pipe (child_err_report_pipe, error))
1022 goto cleanup_and_fail;
1024 _dbus_fd_set_close_on_exec (child_err_report_pipe[READ_END]);
1026 if (!_dbus_full_duplex_pipe (&babysitter_pipe[0], &babysitter_pipe[1], TRUE, error))
1027 goto cleanup_and_fail;
1029 _dbus_fd_set_close_on_exec (babysitter_pipe[0]);
1030 _dbus_fd_set_close_on_exec (babysitter_pipe[1]);
1032 /* Setting up the babysitter is only useful in the parent,
1033 * but we don't want to run out of memory and fail
1034 * after we've already forked, since then we'd leak
1035 * child processes everywhere.
1037 sitter->error_watch = _dbus_watch_new (child_err_report_pipe[READ_END],
1038 DBUS_WATCH_READABLE,
1039 TRUE, handle_watch, sitter, NULL);
1040 if (sitter->error_watch == NULL)
1042 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1043 goto cleanup_and_fail;
1046 if (!_dbus_watch_list_add_watch (sitter->watches, sitter->error_watch))
1048 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1049 goto cleanup_and_fail;
1052 sitter->sitter_watch = _dbus_watch_new (babysitter_pipe[0],
1053 DBUS_WATCH_READABLE,
1054 TRUE, handle_watch, sitter, NULL);
1055 if (sitter->sitter_watch == NULL)
1057 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1058 goto cleanup_and_fail;
1061 if (!_dbus_watch_list_add_watch (sitter->watches, sitter->sitter_watch))
1063 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1064 goto cleanup_and_fail;
1067 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1073 dbus_set_error (error,
1074 DBUS_ERROR_SPAWN_FORK_FAILED,
1075 "Failed to fork (%s)",
1076 _dbus_strerror (errno));
1077 goto cleanup_and_fail;
1081 /* Immediate child, this is the babysitter process. */
1084 /* Be sure we crash if the parent exits
1085 * and we write to the err_report_pipe
1087 signal (SIGPIPE, SIG_DFL);
1089 /* Close the parent's end of the pipes. */
1090 close_and_invalidate (&child_err_report_pipe[READ_END]);
1091 close_and_invalidate (&babysitter_pipe[0]);
1093 /* Create the child that will exec () */
1094 grandchild_pid = fork ();
1096 if (grandchild_pid < 0)
1098 write_err_and_exit (babysitter_pipe[1],
1100 _dbus_assert_not_reached ("Got to code after write_err_and_exit()");
1102 else if (grandchild_pid == 0)
1104 do_exec (child_err_report_pipe[WRITE_END],
1106 child_setup, user_data);
1107 _dbus_assert_not_reached ("Got to code after exec() - should have exited on error");
1111 babysit (grandchild_pid, babysitter_pipe[1]);
1112 _dbus_assert_not_reached ("Got to code after babysit()");
1117 /* Close the uncared-about ends of the pipes */
1118 close_and_invalidate (&child_err_report_pipe[WRITE_END]);
1119 close_and_invalidate (&babysitter_pipe[1]);
1121 sitter->socket_to_babysitter = babysitter_pipe[0];
1122 babysitter_pipe[0] = -1;
1124 sitter->error_pipe_from_child = child_err_report_pipe[READ_END];
1125 child_err_report_pipe[READ_END] = -1;
1127 sitter->sitter_pid = pid;
1129 if (sitter_p != NULL)
1132 _dbus_babysitter_unref (sitter);
1134 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1141 _DBUS_ASSERT_ERROR_IS_SET (error);
1143 close_and_invalidate (&child_err_report_pipe[READ_END]);
1144 close_and_invalidate (&child_err_report_pipe[WRITE_END]);
1145 close_and_invalidate (&babysitter_pipe[0]);
1146 close_and_invalidate (&babysitter_pipe[1]);
1149 _dbus_babysitter_unref (sitter);
1156 #ifdef DBUS_BUILD_TESTS
1159 _dbus_babysitter_block_for_child_exit (DBusBabysitter *sitter)
1161 while (LIVE_CHILDREN (sitter))
1162 babysitter_iteration (sitter, TRUE);
1166 check_spawn_nonexistent (void *data)
1168 char *argv[4] = { NULL, NULL, NULL, NULL };
1169 DBusBabysitter *sitter;
1174 dbus_error_init (&error);
1176 /*** Test launching nonexistent binary */
1178 argv[0] = "/this/does/not/exist/32542sdgafgafdg";
1179 if (_dbus_spawn_async_with_babysitter (&sitter, argv,
1183 _dbus_babysitter_block_for_child_exit (sitter);
1184 _dbus_babysitter_set_child_exit_error (sitter, &error);
1188 _dbus_babysitter_unref (sitter);
1190 if (!dbus_error_is_set (&error))
1192 _dbus_warn ("Did not get an error launching nonexistent executable\n");
1196 if (!(dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY) ||
1197 dbus_error_has_name (&error, DBUS_ERROR_SPAWN_EXEC_FAILED)))
1199 _dbus_warn ("Not expecting error when launching nonexistent executable: %s: %s\n",
1200 error.name, error.message);
1201 dbus_error_free (&error);
1205 dbus_error_free (&error);
1211 check_spawn_segfault (void *data)
1213 char *argv[4] = { NULL, NULL, NULL, NULL };
1214 DBusBabysitter *sitter;
1219 dbus_error_init (&error);
1221 /*** Test launching segfault binary */
1223 argv[0] = TEST_SEGFAULT_BINARY;
1224 if (_dbus_spawn_async_with_babysitter (&sitter, argv,
1228 _dbus_babysitter_block_for_child_exit (sitter);
1229 _dbus_babysitter_set_child_exit_error (sitter, &error);
1233 _dbus_babysitter_unref (sitter);
1235 if (!dbus_error_is_set (&error))
1237 _dbus_warn ("Did not get an error launching segfaulting binary\n");
1241 if (!(dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY) ||
1242 dbus_error_has_name (&error, DBUS_ERROR_SPAWN_CHILD_SIGNALED)))
1244 _dbus_warn ("Not expecting error when launching segfaulting executable: %s: %s\n",
1245 error.name, error.message);
1246 dbus_error_free (&error);
1250 dbus_error_free (&error);
1256 check_spawn_exit (void *data)
1258 char *argv[4] = { NULL, NULL, NULL, NULL };
1259 DBusBabysitter *sitter;
1264 dbus_error_init (&error);
1266 /*** Test launching exit failure binary */
1268 argv[0] = TEST_EXIT_BINARY;
1269 if (_dbus_spawn_async_with_babysitter (&sitter, argv,
1273 _dbus_babysitter_block_for_child_exit (sitter);
1274 _dbus_babysitter_set_child_exit_error (sitter, &error);
1278 _dbus_babysitter_unref (sitter);
1280 if (!dbus_error_is_set (&error))
1282 _dbus_warn ("Did not get an error launching binary that exited with failure code\n");
1286 if (!(dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY) ||
1287 dbus_error_has_name (&error, DBUS_ERROR_SPAWN_CHILD_EXITED)))
1289 _dbus_warn ("Not expecting error when launching exiting executable: %s: %s\n",
1290 error.name, error.message);
1291 dbus_error_free (&error);
1295 dbus_error_free (&error);
1301 check_spawn_and_kill (void *data)
1303 char *argv[4] = { NULL, NULL, NULL, NULL };
1304 DBusBabysitter *sitter;
1309 dbus_error_init (&error);
1311 /*** Test launching sleeping binary then killing it */
1313 argv[0] = TEST_SLEEP_FOREVER_BINARY;
1314 if (_dbus_spawn_async_with_babysitter (&sitter, argv,
1318 _dbus_babysitter_kill_child (sitter);
1320 _dbus_babysitter_block_for_child_exit (sitter);
1322 _dbus_babysitter_set_child_exit_error (sitter, &error);
1326 _dbus_babysitter_unref (sitter);
1328 if (!dbus_error_is_set (&error))
1330 _dbus_warn ("Did not get an error after killing spawned binary\n");
1334 if (!(dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY) ||
1335 dbus_error_has_name (&error, DBUS_ERROR_SPAWN_CHILD_SIGNALED)))
1337 _dbus_warn ("Not expecting error when killing executable: %s: %s\n",
1338 error.name, error.message);
1339 dbus_error_free (&error);
1343 dbus_error_free (&error);
1349 _dbus_spawn_test (const char *test_data_dir)
1351 if (!_dbus_test_oom_handling ("spawn_nonexistent",
1352 check_spawn_nonexistent,
1356 if (!_dbus_test_oom_handling ("spawn_segfault",
1357 check_spawn_segfault,
1361 if (!_dbus_test_oom_handling ("spawn_exit",
1366 if (!_dbus_test_oom_handling ("spawn_and_kill",
1367 check_spawn_and_kill,