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"
37 * @addtogroup DBusInternalsUtils
42 * I'm pretty sure this whole spawn file could be made simpler,
43 * if you thought about it a bit.
47 * Enumeration for status of a read()
51 READ_STATUS_OK, /**< Read succeeded */
52 READ_STATUS_ERROR, /**< Some kind of error */
53 READ_STATUS_EOF /**< EOF returned */
66 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
68 retval = READ_STATUS_OK;
77 to_read = sizeof (int) * n_ints_in_buf - bytes;
86 if (chunk < 0 && errno == EINTR)
91 dbus_set_error (error,
92 DBUS_ERROR_SPAWN_FAILED,
93 "Failed to read from child pipe (%s)",
94 _dbus_strerror (errno));
96 retval = READ_STATUS_ERROR;
101 retval = READ_STATUS_EOF;
108 *n_ints_read = (int)(bytes / sizeof(int));
121 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
123 retval = READ_STATUS_OK;
131 to_read = sizeof (pid_t) - bytes;
137 ((char*)buf) + bytes,
139 if (chunk < 0 && errno == EINTR)
144 dbus_set_error (error,
145 DBUS_ERROR_SPAWN_FAILED,
146 "Failed to read from child pipe (%s)",
147 _dbus_strerror (errno));
149 retval = READ_STATUS_ERROR;
154 retval = READ_STATUS_EOF;
164 /* The implementation uses an intermediate child between the main process
165 * and the grandchild. The grandchild is our spawned process. The intermediate
166 * child is a babysitter process; it keeps track of when the grandchild
167 * exits/crashes, and reaps the grandchild.
170 /* Messages from children to parents */
173 CHILD_EXITED, /* This message is followed by the exit status int */
174 CHILD_FORK_FAILED, /* Followed by errno */
175 CHILD_EXEC_FAILED, /* Followed by errno */
176 CHILD_PID /* Followed by pid_t */
179 struct DBusBabysitter
183 char *executable; /**< executable name to use in error messages */
185 int socket_to_babysitter;
186 int error_pipe_from_child;
189 pid_t grandchild_pid;
191 DBusWatchList *watches;
193 DBusWatch *error_watch;
194 DBusWatch *sitter_watch;
198 unsigned int have_child_status : 1;
199 unsigned int have_fork_errnum : 1;
200 unsigned int have_exec_errnum : 1;
203 static DBusBabysitter*
204 _dbus_babysitter_new (void)
206 DBusBabysitter *sitter;
208 sitter = dbus_new0 (DBusBabysitter, 1);
212 sitter->refcount = 1;
214 sitter->socket_to_babysitter = -1;
215 sitter->error_pipe_from_child = -1;
217 sitter->sitter_pid = -1;
218 sitter->grandchild_pid = -1;
220 sitter->watches = _dbus_watch_list_new ();
221 if (sitter->watches == NULL)
227 _dbus_babysitter_unref (sitter);
232 * Increment the reference count on the babysitter object.
234 * @param sitter the babysitter
237 _dbus_babysitter_ref (DBusBabysitter *sitter)
239 _dbus_assert (sitter != NULL);
240 _dbus_assert (sitter->refcount > 0);
242 sitter->refcount += 1;
246 * Decrement the reference count on the babysitter object.
248 * @param sitter the babysitter
251 _dbus_babysitter_unref (DBusBabysitter *sitter)
253 _dbus_assert (sitter != NULL);
254 _dbus_assert (sitter->refcount > 0);
256 sitter->refcount -= 1;
257 if (sitter->refcount == 0)
259 if (sitter->socket_to_babysitter >= 0)
261 close (sitter->socket_to_babysitter);
262 sitter->socket_to_babysitter = -1;
265 if (sitter->error_pipe_from_child >= 0)
267 close (sitter->error_pipe_from_child);
268 sitter->error_pipe_from_child = -1;
271 if (sitter->sitter_pid != -1)
276 /* Reap the babysitter */
278 ret = waitpid (sitter->sitter_pid, &status, 0);
283 else if (errno == ECHILD)
284 _dbus_warn ("Babysitter process not available to be reaped; should not happen\n");
286 _dbus_warn ("Unexpected error %d in waitpid() for babysitter: %s\n",
287 errno, _dbus_strerror (errno));
291 _dbus_verbose ("Reaped %ld, waiting for babysitter %ld\n",
292 (long) ret, (long) sitter->sitter_pid);
294 if (WIFEXITED (sitter->status))
295 _dbus_verbose ("Babysitter exited with status %d\n",
296 WEXITSTATUS (sitter->status));
297 else if (WIFSIGNALED (sitter->status))
298 _dbus_verbose ("Babysitter received signal %d\n",
299 WTERMSIG (sitter->status));
301 _dbus_verbose ("Babysitter exited abnormally\n");
304 sitter->sitter_pid = -1;
307 if (sitter->error_watch)
309 _dbus_watch_invalidate (sitter->error_watch);
310 _dbus_watch_unref (sitter->error_watch);
311 sitter->error_watch = NULL;
314 if (sitter->sitter_watch)
316 _dbus_watch_invalidate (sitter->sitter_watch);
317 _dbus_watch_unref (sitter->sitter_watch);
318 sitter->sitter_watch = NULL;
322 _dbus_watch_list_free (sitter->watches);
324 dbus_free (sitter->executable);
331 read_data (DBusBabysitter *sitter,
339 dbus_error_init (&error);
341 r = read_ints (fd, &what, 1, &got, &error);
345 case READ_STATUS_ERROR:
346 _dbus_warn ("Failed to read data from fd %d: %s\n", fd, error.message);
347 dbus_error_free (&error);
350 case READ_STATUS_EOF:
362 case CHILD_FORK_FAILED:
363 case CHILD_EXEC_FAILED:
367 r = read_ints (fd, &arg, 1, &got, &error);
371 case READ_STATUS_ERROR:
372 _dbus_warn ("Failed to read arg from fd %d: %s\n", fd, error.message);
373 dbus_error_free (&error);
375 case READ_STATUS_EOF:
383 if (what == CHILD_EXITED)
385 sitter->have_child_status = TRUE;
386 sitter->status = arg;
387 _dbus_verbose ("recorded child status exited = %d signaled = %d exitstatus = %d termsig = %d\n",
388 WIFEXITED (sitter->status), WIFSIGNALED (sitter->status),
389 WEXITSTATUS (sitter->status), WTERMSIG (sitter->status));
391 else if (what == CHILD_FORK_FAILED)
393 sitter->have_fork_errnum = TRUE;
394 sitter->errnum = arg;
395 _dbus_verbose ("recorded fork errnum %d\n", sitter->errnum);
397 else if (what == CHILD_EXEC_FAILED)
399 sitter->have_exec_errnum = TRUE;
400 sitter->errnum = arg;
401 _dbus_verbose ("recorded exec errnum %d\n", sitter->errnum);
410 r = read_pid (fd, &pid, &error);
414 case READ_STATUS_ERROR:
415 _dbus_warn ("Failed to read PID from fd %d: %s\n", fd, error.message);
416 dbus_error_free (&error);
418 case READ_STATUS_EOF:
424 sitter->grandchild_pid = pid;
426 _dbus_verbose ("recorded grandchild pid %d\n", sitter->grandchild_pid);
430 _dbus_warn ("Unknown message received from babysitter process\n");
439 close_socket_to_babysitter (DBusBabysitter *sitter)
441 _dbus_verbose ("Closing babysitter\n");
442 close (sitter->socket_to_babysitter);
443 sitter->socket_to_babysitter = -1;
447 close_error_pipe_from_child (DBusBabysitter *sitter)
449 _dbus_verbose ("Closing child error\n");
450 close (sitter->error_pipe_from_child);
451 sitter->error_pipe_from_child = -1;
455 handle_babysitter_socket (DBusBabysitter *sitter,
458 /* Even if we have POLLHUP, we want to keep reading
459 * data until POLLIN goes away; so this function only
460 * looks at HUP/ERR if no IN is set.
462 if (revents & _DBUS_POLLIN)
464 _dbus_verbose ("Reading data from babysitter\n");
465 if (read_data (sitter, sitter->socket_to_babysitter) != READ_STATUS_OK)
466 close_socket_to_babysitter (sitter);
468 else if (revents & (_DBUS_POLLERR | _DBUS_POLLHUP))
470 close_socket_to_babysitter (sitter);
475 handle_error_pipe (DBusBabysitter *sitter,
478 if (revents & _DBUS_POLLIN)
480 _dbus_verbose ("Reading data from child error\n");
481 if (read_data (sitter, sitter->error_pipe_from_child) != READ_STATUS_OK)
482 close_error_pipe_from_child (sitter);
484 else if (revents & (_DBUS_POLLERR | _DBUS_POLLHUP))
486 close_error_pipe_from_child (sitter);
490 /* returns whether there were any poll events handled */
492 babysitter_iteration (DBusBabysitter *sitter,
497 dbus_bool_t descriptors_ready;
499 descriptors_ready = FALSE;
503 if (sitter->error_pipe_from_child >= 0)
505 fds[i].fd = sitter->error_pipe_from_child;
506 fds[i].events = _DBUS_POLLIN;
511 if (sitter->socket_to_babysitter >= 0)
513 fds[i].fd = sitter->socket_to_babysitter;
514 fds[i].events = _DBUS_POLLIN;
523 ret = _dbus_poll (fds, i, 0);
524 if (ret == 0 && block)
525 ret = _dbus_poll (fds, i, -1);
529 descriptors_ready = TRUE;
534 if (fds[i].fd == sitter->error_pipe_from_child)
535 handle_error_pipe (sitter, fds[i].revents);
536 else if (fds[i].fd == sitter->socket_to_babysitter)
537 handle_babysitter_socket (sitter, fds[i].revents);
542 return descriptors_ready;
546 * Macro returns #TRUE if the babysitter still has live sockets open to the
547 * babysitter child or the grandchild.
549 #define LIVE_CHILDREN(sitter) ((sitter)->socket_to_babysitter >= 0 || (sitter)->error_pipe_from_child >= 0)
552 * Blocks until the babysitter process gives us the PID of the spawned grandchild,
553 * then kills the spawned grandchild.
555 * @param sitter the babysitter object
558 _dbus_babysitter_kill_child (DBusBabysitter *sitter)
560 /* be sure we have the PID of the child */
561 while (LIVE_CHILDREN (sitter) &&
562 sitter->grandchild_pid == -1)
563 babysitter_iteration (sitter, TRUE);
565 _dbus_verbose ("Got child PID %ld for killing\n",
566 (long) sitter->grandchild_pid);
568 if (sitter->grandchild_pid == -1)
569 return; /* child is already dead, or we're so hosed we'll never recover */
571 kill (sitter->grandchild_pid, SIGKILL);
575 * Checks whether the child has exited, without blocking.
577 * @param sitter the babysitter
580 _dbus_babysitter_get_child_exited (DBusBabysitter *sitter)
583 /* Be sure we're up-to-date */
584 while (LIVE_CHILDREN (sitter) &&
585 babysitter_iteration (sitter, FALSE))
588 /* We will have exited the babysitter when the child has exited */
589 return sitter->socket_to_babysitter < 0;
593 * Sets the #DBusError with an explanation of why the spawned
594 * child process exited (on a signal, or whatever). If
595 * the child process has not exited, does nothing (error
596 * will remain unset).
598 * @param sitter the babysitter
599 * @param error an error to fill in
602 _dbus_babysitter_set_child_exit_error (DBusBabysitter *sitter,
605 if (!_dbus_babysitter_get_child_exited (sitter))
608 /* Note that if exec fails, we will also get a child status
609 * from the babysitter saying the child exited,
610 * so we need to give priority to the exec error
612 if (sitter->have_exec_errnum)
614 dbus_set_error (error, DBUS_ERROR_SPAWN_EXEC_FAILED,
615 "Failed to execute program %s: %s",
616 sitter->executable, _dbus_strerror (sitter->errnum));
618 else if (sitter->have_fork_errnum)
620 dbus_set_error (error, DBUS_ERROR_NO_MEMORY,
621 "Failed to fork a new process %s: %s",
622 sitter->executable, _dbus_strerror (sitter->errnum));
624 else if (sitter->have_child_status)
626 if (WIFEXITED (sitter->status))
627 dbus_set_error (error, DBUS_ERROR_SPAWN_CHILD_EXITED,
628 "Process %s exited with status %d",
629 sitter->executable, WEXITSTATUS (sitter->status));
630 else if (WIFSIGNALED (sitter->status))
631 dbus_set_error (error, DBUS_ERROR_SPAWN_CHILD_SIGNALED,
632 "Process %s received signal %d",
633 sitter->executable, WTERMSIG (sitter->status));
635 dbus_set_error (error, DBUS_ERROR_FAILED,
636 "Process %s exited abnormally",
641 dbus_set_error (error, DBUS_ERROR_FAILED,
642 "Process %s exited, reason unknown",
648 * Sets watch functions to notify us when the
649 * babysitter object needs to read/write file descriptors.
651 * @param sitter the babysitter
652 * @param add_function function to begin monitoring a new descriptor.
653 * @param remove_function function to stop monitoring a descriptor.
654 * @param toggled_function function to notify when the watch is enabled/disabled
655 * @param data data to pass to add_function and remove_function.
656 * @param free_data_function function to be called to free the data.
657 * @returns #FALSE on failure (no memory)
660 _dbus_babysitter_set_watch_functions (DBusBabysitter *sitter,
661 DBusAddWatchFunction add_function,
662 DBusRemoveWatchFunction remove_function,
663 DBusWatchToggledFunction toggled_function,
665 DBusFreeFunction free_data_function)
667 return _dbus_watch_list_set_functions (sitter->watches,
676 handle_watch (DBusWatch *watch,
677 unsigned int condition,
680 DBusBabysitter *sitter = data;
685 if (condition & DBUS_WATCH_READABLE)
686 revents |= _DBUS_POLLIN;
687 if (condition & DBUS_WATCH_ERROR)
688 revents |= _DBUS_POLLERR;
689 if (condition & DBUS_WATCH_HANGUP)
690 revents |= _DBUS_POLLHUP;
692 fd = dbus_watch_get_fd (watch);
694 if (fd == sitter->error_pipe_from_child)
695 handle_error_pipe (sitter, revents);
696 else if (fd == sitter->socket_to_babysitter)
697 handle_babysitter_socket (sitter, revents);
699 while (LIVE_CHILDREN (sitter) &&
700 babysitter_iteration (sitter, FALSE))
706 /** Helps remember which end of the pipe is which */
708 /** Helps remember which end of the pipe is which */
712 /* Avoids a danger in threaded situations (calling close()
713 * on a file descriptor twice, and another thread has
714 * re-opened it since the first close)
717 close_and_invalidate (int *fd)
736 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
740 dbus_set_error (error,
741 DBUS_ERROR_SPAWN_FAILED,
742 "Failed to create pipe for communicating with child process (%s)",
743 _dbus_strerror (errno));
751 do_write (int fd, const void *buf, size_t count)
753 size_t bytes_written;
760 ret = write (fd, ((const char*)buf) + bytes_written, count - bytes_written);
768 _dbus_warn ("Failed to write data to pipe!\n");
769 exit (1); /* give up, we suck */
773 bytes_written += ret;
775 if (bytes_written < count)
780 write_err_and_exit (int fd, int msg)
784 do_write (fd, &msg, sizeof (msg));
785 do_write (fd, &en, sizeof (en));
791 write_pid (int fd, pid_t pid)
795 do_write (fd, &msg, sizeof (msg));
796 do_write (fd, &pid, sizeof (pid));
800 write_status_and_exit (int fd, int status)
802 int msg = CHILD_EXITED;
804 do_write (fd, &msg, sizeof (msg));
805 do_write (fd, &status, sizeof (status));
811 do_exec (int child_err_report_fd,
813 DBusSpawnChildSetupFunc child_setup,
816 #ifdef DBUS_BUILD_TESTS
820 _dbus_verbose_reset ();
821 _dbus_verbose ("Child process has PID %lu\n",
825 (* child_setup) (user_data);
827 #ifdef DBUS_BUILD_TESTS
828 max_open = sysconf (_SC_OPEN_MAX);
830 for (i = 3; i < max_open; i++)
834 if (i == child_err_report_fd)
837 retval = fcntl (i, F_GETFD);
839 if (retval != -1 && !(retval & FD_CLOEXEC))
840 _dbus_warn ("Fd %d did not have the close-on-exec flag set!\n", i);
844 execv (argv[0], argv);
847 write_err_and_exit (child_err_report_fd,
852 check_babysit_events (pid_t grandchild_pid,
859 ret = waitpid (grandchild_pid, &status, WNOHANG);
863 _dbus_verbose ("no child exited\n");
865 ; /* no child exited */
869 /* This isn't supposed to happen. */
870 _dbus_warn ("unexpected waitpid() failure in check_babysit_events(): %s\n",
871 _dbus_strerror (errno));
874 else if (ret == grandchild_pid)
877 _dbus_verbose ("reaped child pid %ld\n", (long) ret);
879 write_status_and_exit (parent_pipe, status);
883 _dbus_warn ("waitpid() reaped pid %d that we've never heard of\n",
888 if (revents & _DBUS_POLLIN)
890 _dbus_verbose ("babysitter got POLLIN from parent pipe\n");
893 if (revents & (_DBUS_POLLERR | _DBUS_POLLHUP))
895 /* Parent is gone, so we just exit */
896 _dbus_verbose ("babysitter got POLLERR or POLLHUP from parent\n");
901 static int babysit_sigchld_pipe = -1;
904 babysit_signal_handler (int signo)
908 write (babysit_sigchld_pipe, &b, 1);
914 babysit (pid_t grandchild_pid,
919 /* We don't exec, so we keep parent state, such as the pid that
920 * _dbus_verbose() uses. Reset the pid here.
922 _dbus_verbose_reset ();
924 /* I thought SIGCHLD would just wake up the poll, but
925 * that didn't seem to work, so added this pipe.
926 * Probably the pipe is more likely to work on busted
927 * operating systems anyhow.
929 if (pipe (sigchld_pipe) < 0)
931 _dbus_warn ("Not enough file descriptors to create pipe in babysitter process\n");
935 babysit_sigchld_pipe = sigchld_pipe[WRITE_END];
937 _dbus_set_signal_handler (SIGCHLD, babysit_signal_handler);
939 write_pid (parent_pipe, grandchild_pid);
941 check_babysit_events (grandchild_pid, parent_pipe, 0);
947 pfds[0].fd = parent_pipe;
948 pfds[0].events = _DBUS_POLLIN;
951 pfds[1].fd = sigchld_pipe[READ_END];
952 pfds[1].events = _DBUS_POLLIN;
955 _dbus_poll (pfds, _DBUS_N_ELEMENTS (pfds), -1);
957 if (pfds[0].revents != 0)
959 check_babysit_events (grandchild_pid, parent_pipe, pfds[0].revents);
961 else if (pfds[1].revents & _DBUS_POLLIN)
964 read (sigchld_pipe[READ_END], &b, 1);
965 /* do waitpid check */
966 check_babysit_events (grandchild_pid, parent_pipe, 0);
974 * Spawns a new process. The executable name and argv[0]
975 * are the same, both are provided in argv[0]. The child_setup
976 * function is passed the given user_data and is run in the child
977 * just before calling exec().
979 * Also creates a "babysitter" which tracks the status of the
980 * child process, advising the parent if the child exits.
981 * If the spawn fails, no babysitter is created.
982 * If sitter_p is #NULL, no babysitter is kept.
984 * @param sitter_p return location for babysitter or #NULL
985 * @param argv the executable and arguments
986 * @param child_setup function to call in child pre-exec()
987 * @param user_data user data for setup function
988 * @param error error object to be filled in if function fails
989 * @returns #TRUE on success, #FALSE if error is filled in
992 _dbus_spawn_async_with_babysitter (DBusBabysitter **sitter_p,
994 DBusSpawnChildSetupFunc child_setup,
998 DBusBabysitter *sitter;
999 int child_err_report_pipe[2] = { -1, -1 };
1000 int babysitter_pipe[2] = { -1, -1 };
1003 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1008 sitter = _dbus_babysitter_new ();
1011 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1015 sitter->executable = _dbus_strdup (argv[0]);
1016 if (sitter->executable == NULL)
1018 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1019 goto cleanup_and_fail;
1022 if (!make_pipe (child_err_report_pipe, error))
1023 goto cleanup_and_fail;
1025 _dbus_fd_set_close_on_exec (child_err_report_pipe[READ_END]);
1027 if (!_dbus_full_duplex_pipe (&babysitter_pipe[0], &babysitter_pipe[1], TRUE, error))
1028 goto cleanup_and_fail;
1030 _dbus_fd_set_close_on_exec (babysitter_pipe[0]);
1031 _dbus_fd_set_close_on_exec (babysitter_pipe[1]);
1033 /* Setting up the babysitter is only useful in the parent,
1034 * but we don't want to run out of memory and fail
1035 * after we've already forked, since then we'd leak
1036 * child processes everywhere.
1038 sitter->error_watch = _dbus_watch_new (child_err_report_pipe[READ_END],
1039 DBUS_WATCH_READABLE,
1040 TRUE, handle_watch, sitter, NULL);
1041 if (sitter->error_watch == NULL)
1043 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1044 goto cleanup_and_fail;
1047 if (!_dbus_watch_list_add_watch (sitter->watches, sitter->error_watch))
1049 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1050 goto cleanup_and_fail;
1053 sitter->sitter_watch = _dbus_watch_new (babysitter_pipe[0],
1054 DBUS_WATCH_READABLE,
1055 TRUE, handle_watch, sitter, NULL);
1056 if (sitter->sitter_watch == NULL)
1058 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1059 goto cleanup_and_fail;
1062 if (!_dbus_watch_list_add_watch (sitter->watches, sitter->sitter_watch))
1064 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1065 goto cleanup_and_fail;
1068 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1074 dbus_set_error (error,
1075 DBUS_ERROR_SPAWN_FORK_FAILED,
1076 "Failed to fork (%s)",
1077 _dbus_strerror (errno));
1078 goto cleanup_and_fail;
1082 /* Immediate child, this is the babysitter process. */
1085 /* Be sure we crash if the parent exits
1086 * and we write to the err_report_pipe
1088 signal (SIGPIPE, SIG_DFL);
1090 /* Close the parent's end of the pipes. */
1091 close_and_invalidate (&child_err_report_pipe[READ_END]);
1092 close_and_invalidate (&babysitter_pipe[0]);
1094 /* Create the child that will exec () */
1095 grandchild_pid = fork ();
1097 if (grandchild_pid < 0)
1099 write_err_and_exit (babysitter_pipe[1],
1101 _dbus_assert_not_reached ("Got to code after write_err_and_exit()");
1103 else if (grandchild_pid == 0)
1105 do_exec (child_err_report_pipe[WRITE_END],
1107 child_setup, user_data);
1108 _dbus_assert_not_reached ("Got to code after exec() - should have exited on error");
1112 babysit (grandchild_pid, babysitter_pipe[1]);
1113 _dbus_assert_not_reached ("Got to code after babysit()");
1118 /* Close the uncared-about ends of the pipes */
1119 close_and_invalidate (&child_err_report_pipe[WRITE_END]);
1120 close_and_invalidate (&babysitter_pipe[1]);
1122 sitter->socket_to_babysitter = babysitter_pipe[0];
1123 babysitter_pipe[0] = -1;
1125 sitter->error_pipe_from_child = child_err_report_pipe[READ_END];
1126 child_err_report_pipe[READ_END] = -1;
1128 sitter->sitter_pid = pid;
1130 if (sitter_p != NULL)
1133 _dbus_babysitter_unref (sitter);
1135 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1142 _DBUS_ASSERT_ERROR_IS_SET (error);
1144 close_and_invalidate (&child_err_report_pipe[READ_END]);
1145 close_and_invalidate (&child_err_report_pipe[WRITE_END]);
1146 close_and_invalidate (&babysitter_pipe[0]);
1147 close_and_invalidate (&babysitter_pipe[1]);
1150 _dbus_babysitter_unref (sitter);
1157 #ifdef DBUS_BUILD_TESTS
1160 _dbus_babysitter_block_for_child_exit (DBusBabysitter *sitter)
1162 while (LIVE_CHILDREN (sitter))
1163 babysitter_iteration (sitter, TRUE);
1167 check_spawn_nonexistent (void *data)
1169 char *argv[4] = { NULL, NULL, NULL, NULL };
1170 DBusBabysitter *sitter;
1175 dbus_error_init (&error);
1177 /*** Test launching nonexistent binary */
1179 argv[0] = "/this/does/not/exist/32542sdgafgafdg";
1180 if (_dbus_spawn_async_with_babysitter (&sitter, argv,
1184 _dbus_babysitter_block_for_child_exit (sitter);
1185 _dbus_babysitter_set_child_exit_error (sitter, &error);
1189 _dbus_babysitter_unref (sitter);
1191 if (!dbus_error_is_set (&error))
1193 _dbus_warn ("Did not get an error launching nonexistent executable\n");
1197 if (!(dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY) ||
1198 dbus_error_has_name (&error, DBUS_ERROR_SPAWN_EXEC_FAILED)))
1200 _dbus_warn ("Not expecting error when launching nonexistent executable: %s: %s\n",
1201 error.name, error.message);
1202 dbus_error_free (&error);
1206 dbus_error_free (&error);
1212 check_spawn_segfault (void *data)
1214 char *argv[4] = { NULL, NULL, NULL, NULL };
1215 DBusBabysitter *sitter;
1220 dbus_error_init (&error);
1222 /*** Test launching segfault binary */
1224 argv[0] = TEST_SEGFAULT_BINARY;
1225 if (_dbus_spawn_async_with_babysitter (&sitter, argv,
1229 _dbus_babysitter_block_for_child_exit (sitter);
1230 _dbus_babysitter_set_child_exit_error (sitter, &error);
1234 _dbus_babysitter_unref (sitter);
1236 if (!dbus_error_is_set (&error))
1238 _dbus_warn ("Did not get an error launching segfaulting binary\n");
1242 if (!(dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY) ||
1243 dbus_error_has_name (&error, DBUS_ERROR_SPAWN_CHILD_SIGNALED)))
1245 _dbus_warn ("Not expecting error when launching segfaulting executable: %s: %s\n",
1246 error.name, error.message);
1247 dbus_error_free (&error);
1251 dbus_error_free (&error);
1257 check_spawn_exit (void *data)
1259 char *argv[4] = { NULL, NULL, NULL, NULL };
1260 DBusBabysitter *sitter;
1265 dbus_error_init (&error);
1267 /*** Test launching exit failure binary */
1269 argv[0] = TEST_EXIT_BINARY;
1270 if (_dbus_spawn_async_with_babysitter (&sitter, argv,
1274 _dbus_babysitter_block_for_child_exit (sitter);
1275 _dbus_babysitter_set_child_exit_error (sitter, &error);
1279 _dbus_babysitter_unref (sitter);
1281 if (!dbus_error_is_set (&error))
1283 _dbus_warn ("Did not get an error launching binary that exited with failure code\n");
1287 if (!(dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY) ||
1288 dbus_error_has_name (&error, DBUS_ERROR_SPAWN_CHILD_EXITED)))
1290 _dbus_warn ("Not expecting error when launching exiting executable: %s: %s\n",
1291 error.name, error.message);
1292 dbus_error_free (&error);
1296 dbus_error_free (&error);
1302 check_spawn_and_kill (void *data)
1304 char *argv[4] = { NULL, NULL, NULL, NULL };
1305 DBusBabysitter *sitter;
1310 dbus_error_init (&error);
1312 /*** Test launching sleeping binary then killing it */
1314 argv[0] = TEST_SLEEP_FOREVER_BINARY;
1315 if (_dbus_spawn_async_with_babysitter (&sitter, argv,
1319 _dbus_babysitter_kill_child (sitter);
1321 _dbus_babysitter_block_for_child_exit (sitter);
1323 _dbus_babysitter_set_child_exit_error (sitter, &error);
1327 _dbus_babysitter_unref (sitter);
1329 if (!dbus_error_is_set (&error))
1331 _dbus_warn ("Did not get an error after killing spawned binary\n");
1335 if (!(dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY) ||
1336 dbus_error_has_name (&error, DBUS_ERROR_SPAWN_CHILD_SIGNALED)))
1338 _dbus_warn ("Not expecting error when killing executable: %s: %s\n",
1339 error.name, error.message);
1340 dbus_error_free (&error);
1344 dbus_error_free (&error);
1350 _dbus_spawn_test (const char *test_data_dir)
1352 if (!_dbus_test_oom_handling ("spawn_nonexistent",
1353 check_spawn_nonexistent,
1357 if (!_dbus_test_oom_handling ("spawn_segfault",
1358 check_spawn_segfault,
1362 if (!_dbus_test_oom_handling ("spawn_exit",
1367 if (!_dbus_test_oom_handling ("spawn_and_kill",
1368 check_spawn_and_kill,