static int
x_io_error_handler (Display *xdisplay)
{
verbose ("X IO error\n");
kill_bus_and_exit ();
return 0;
}
int
main (int argc, char **argv)
{
const char *prev_arg;
const char *shname;
const char *runprog = NULL;
int remaining_args = 0;
int exit_with_session;
int exit_with_x11 = FALSE;
int binary_syntax = FALSE;
int c_shell_syntax = FALSE;
int bourne_shell_syntax = FALSE;
int auto_shell_syntax = FALSE;
int autolaunch = FALSE;
int requires_arg = FALSE;
int close_stderr = FALSE;
int i;
int ret;
int bus_pid_to_launcher_pipe[2];
int bus_pid_to_babysitter_pipe[2];
int bus_address_to_launcher_pipe[2];
char *config_file;
dbus_bool_t user_bus_supported = FALSE;
DBusString user_bus;
const char *error_str;
exit_with_session = FALSE;
config_file = NULL;
/* Ensure that the first three fds are open, to ensure that when we
* create other file descriptors (for example for epoll, inotify or
* a socket), they never get assigned as fd 0, 1 or 2. If they were,
* which could happen if our caller had (incorrectly) closed those
* standard fds, then we'd start dbus-daemon with those fds closed,
* which is unexpected and could cause it to misbehave. */
if (!_dbus_ensure_standard_fds (0, &error_str))
{
fprintf (stderr,
"dbus-launch: fatal error setting up standard fds: %s: %s\n",
error_str, _dbus_strerror (errno));
return 1;
}
prev_arg = NULL;
i = 1;
while (i < argc)
{
const char *arg = argv[i];
if (strcmp (arg, "--help") == 0 ||
strcmp (arg, "-h") == 0 ||
strcmp (arg, "-?") == 0)
usage (0);
else if (strcmp (arg, "--auto-syntax") == 0)
auto_shell_syntax = TRUE;
else if (strcmp (arg, "-c") == 0 ||
strcmp (arg, "--csh-syntax") == 0)
c_shell_syntax = TRUE;
else if (strcmp (arg, "-s") == 0 ||
strcmp (arg, "--sh-syntax") == 0)
bourne_shell_syntax = TRUE;
else if (strcmp (arg, "--binary-syntax") == 0)
binary_syntax = TRUE;
else if (strcmp (arg, "--version") == 0)
version ();
else if (strcmp (arg, "--exit-with-session") == 0)
exit_with_session = TRUE;
else if (strcmp (arg, "--exit-with-x11") == 0)
exit_with_x11 = TRUE;
else if (strcmp (arg, "--close-stderr") == 0)
close_stderr = TRUE;
else if (strstr (arg, "--autolaunch=") == arg)
{
const char *s;
if (autolaunch)
{
fprintf (stderr, "--autolaunch given twice\n");
exit (1);
}
autolaunch = TRUE;
s = strchr (arg, '=');
++s;
save_machine_uuid (s);
}
else if (prev_arg &&
strcmp (prev_arg, "--autolaunch") == 0)
{
if (autolaunch)
{
fprintf (stderr, "--autolaunch given twice\n");
exit (1);
}
autolaunch = TRUE;
save_machine_uuid (arg);
requires_arg = FALSE;
}
else if (strcmp (arg, "--autolaunch") == 0)
requires_arg = TRUE;
else if (strstr (arg, "--config-file=") == arg)
{
const char *file;
if (config_file != NULL)
{
fprintf (stderr, "--config-file given twice\n");
exit (1);
}
file = strchr (arg, '=');
++file;
config_file = xstrdup (file);
}
else if (prev_arg &&
strcmp (prev_arg, "--config-file") == 0)
{
if (config_file != NULL)
{
fprintf (stderr, "--config-file given twice\n");
exit (1);
}
config_file = xstrdup (arg);
requires_arg = FALSE;
}
else if (strcmp (arg, "--config-file") == 0)
requires_arg = TRUE;
else if (arg[0] == '-')
{
if (strcmp (arg, "--") != 0)
{
fprintf (stderr, "Option `%s' is unknown.\n", arg);
exit (1);
}
else
{
runprog = argv[i+1];
remaining_args = i+2;
break;
}
}
else
{
runprog = arg;
remaining_args = i+1;
break;
}
prev_arg = arg;
++i;
}
if (requires_arg)
{
fprintf (stderr, "Option `%s' requires an argument.\n", prev_arg);
exit (1);
}
if (auto_shell_syntax)
{
if ((shname = getenv ("SHELL")) != NULL)
{
if (!strncmp (shname + strlen (shname) - 3, "csh", 3))
c_shell_syntax = TRUE;
else
bourne_shell_syntax = TRUE;
}
else
bourne_shell_syntax = TRUE;
}
if (exit_with_session)
verbose ("--exit-with-session enabled\n");
if (exit_with_x11)
verbose ("--exit-with-x11 enabled\n");
if (autolaunch)
{
#ifndef DBUS_BUILD_X11
fprintf (stderr, "Autolaunch requested, but X11 support not compiled in.\n"
"Cannot continue.\n");
exit (1);
#else /* DBUS_BUILD_X11 */
fprintf (stderr, "X11 autolaunch support disabled at compile time.\n");
exit (1);
#endif /* DBUS_BUILD_X11 */
}
else if (exit_with_x11)
{
#ifndef DBUS_BUILD_X11
fprintf (stderr, "Session lifetime based on X11 requested, but X11 support not compiled in.\n");
exit (1);
#else /* DBUS_BUILD_X11 */
if (!read_machine_uuid_if_needed())
{
fprintf (stderr, "Session lifetime based on X11 requested, but machine UUID unavailable.\n");
exit (1);
}
if (!x11_init ())
{
fprintf (stderr, "Session lifetime based on X11 requested, but X11 initialization failed.\n");
exit (1);
}
#endif /* DBUS_BUILD_X11 */
}
#ifdef DBUS_BUILD_X11
else if (read_machine_uuid_if_needed())
{
x11_init();
}
#endif /* DBUS_BUILD_X11 */
if (pipe (bus_pid_to_launcher_pipe) < 0 ||
pipe (bus_address_to_launcher_pipe) < 0 ||
pipe (bus_pid_to_babysitter_pipe) < 0)
{
fprintf (stderr,
"Failed to create pipe: %s\n",
strerror (errno));
exit (1);
}
ret = fork ();
if (ret < 0)
{
fprintf (stderr, "Failed to fork: %s\n",
strerror (errno));
exit (1);
}
if (ret == 0)
{
/* Child */
#define MAX_FD_LEN 64
char write_pid_fd_as_string[MAX_FD_LEN];
char write_address_fd_as_string[MAX_FD_LEN];
#ifdef DBUS_BUILD_X11
xdisplay = NULL;
#endif
if (close_stderr)
do_close_stderr ();
verbose ("=== Babysitter's intermediate parent created\n");
/* Fork once more to create babysitter */
ret = fork ();
if (ret < 0)
{
fprintf (stderr, "Failed to fork: %s\n",
strerror (errno));
exit (1);
}
if (ret > 0)
{
/* In babysitter */
verbose ("=== Babysitter's intermediate parent continues\n");
close (bus_pid_to_launcher_pipe[READ_END]);
close (bus_pid_to_launcher_pipe[WRITE_END]);
close (bus_address_to_launcher_pipe[READ_END]);
close (bus_address_to_launcher_pipe[WRITE_END]);
close (bus_pid_to_babysitter_pipe[WRITE_END]);
/* babysit() will fork *again*
* and will also reap the pre-forked bus
* daemon
*/
babysit (exit_with_session || exit_with_x11, ret,
bus_pid_to_babysitter_pipe[READ_END]);
exit (0);
}
verbose ("=== Bus exec process created\n");
/* Now we are the bus process (well, almost;
* dbus-daemon itself forks again)
*/
close (bus_pid_to_launcher_pipe[READ_END]);
close (bus_address_to_launcher_pipe[READ_END]);
close (bus_pid_to_babysitter_pipe[READ_END]);
close (bus_pid_to_babysitter_pipe[WRITE_END]);
/* If we have a user bus and want to use it, do so instead of
* exec'ing a new dbus-daemon. */
if (autolaunch && user_bus_supported)
{
do_write (bus_pid_to_launcher_pipe[WRITE_END], "0\n", 2);
close (bus_pid_to_launcher_pipe[WRITE_END]);
do_write (bus_address_to_launcher_pipe[WRITE_END],
_dbus_string_get_const_data (&user_bus),
_dbus_string_get_length (&user_bus));
do_write (bus_address_to_launcher_pipe[WRITE_END], "\n", 1);
close (bus_address_to_launcher_pipe[WRITE_END]);
exit (0);
}
sprintf (write_pid_fd_as_string,
"%d", bus_pid_to_launcher_pipe[WRITE_END]);
sprintf (write_address_fd_as_string,
"%d", bus_address_to_launcher_pipe[WRITE_END]);
verbose ("Calling exec()\n");
#ifdef DBUS_ENABLE_EMBEDDED_TESTS
{
/* exec from testdir */
const char *test_daemon = getenv ("DBUS_TEST_DAEMON");
if (test_daemon != NULL)
{
if (config_file == NULL && getenv ("DBUS_TEST_DATA") != NULL)
{
config_file = concat2 (getenv ("DBUS_TEST_DATA"),
"/valid-config-files/session.conf");
if (config_file == NULL)
{
fprintf (stderr, "Out of memory\n");
exit (1);
}
}
execl (test_daemon,
test_daemon,
"--fork",
"--print-pid", write_pid_fd_as_string,
"--print-address", write_address_fd_as_string,
config_file ? "--config-file" : "--session",
config_file, /* has to be last in this varargs list */
NULL);
fprintf (stderr,
"Failed to execute test message bus daemon %s: %s.\n",
test_daemon, strerror (errno));
exit (1);
}
}
#endif /* DBUS_ENABLE_EMBEDDED_TESTS */
execl (DBUS_DAEMONDIR"/dbus-daemon",
DBUS_DAEMONDIR"/dbus-daemon",
"--fork",
"--print-pid", write_pid_fd_as_string,
"--print-address", write_address_fd_as_string,
config_file ? "--config-file" : "--session",
config_file, /* has to be last in this varargs list */
NULL);
fprintf (stderr,
"Failed to execute message bus daemon %s: %s. Will try again without full path.\n",
DBUS_DAEMONDIR"/dbus-daemon", strerror (errno));
/*
* If it failed, try running without full PATH. Note this is needed
* because the build process builds the run-with-tmp-session-bus.conf
* file and the dbus-daemon will not be in the install location during
* build time.
*/
execlp ("dbus-daemon",
"dbus-daemon",
"--fork",
"--print-pid", write_pid_fd_as_string,
"--print-address", write_address_fd_as_string,
config_file ? "--config-file" : "--session",
config_file, /* has to be last in this varargs list */
NULL);
fprintf (stderr,
"Failed to execute message bus daemon: %s\n",
strerror (errno));
exit (1);
}
else
{
/* Parent */
#define MAX_PID_LEN 64
pid_t bus_pid;
char bus_address[MAX_ADDR_LEN];
char buf[MAX_PID_LEN];
char *end;
long wid = 0;
long val;
verbose ("=== Parent dbus-launch continues\n");
close (bus_pid_to_launcher_pipe[WRITE_END]);
close (bus_address_to_launcher_pipe[WRITE_END]);
close (bus_pid_to_babysitter_pipe[READ_END]);
verbose ("Waiting for babysitter's intermediate parent\n");
/* Immediately reap parent of babysitter
* (which was created just for us to reap)
*/
if (do_waitpid (ret) < 0)
{
fprintf (stderr, "Failed to waitpid() for babysitter intermediate process: %s\n",
strerror (errno));
exit (1);
}
verbose ("Reading address from bus\n");
/* Read the pipe data, print, and exit */
switch (read_line (bus_address_to_launcher_pipe[READ_END],
bus_address, MAX_ADDR_LEN))
{
case READ_STATUS_OK:
break;
case READ_STATUS_EOF:
fprintf (stderr, "EOF in dbus-launch reading address from bus daemon\n");
exit (1);
break;
case READ_STATUS_ERROR:
fprintf (stderr, "Error in dbus-launch reading address from bus daemon: %s\n",
strerror (errno));
exit (1);
break;
}
close (bus_address_to_launcher_pipe[READ_END]);
verbose ("Reading PID from daemon\n");
/* Now read data */
switch (read_line (bus_pid_to_launcher_pipe[READ_END], buf, MAX_PID_LEN))
{
case READ_STATUS_OK:
break;
case READ_STATUS_EOF:
fprintf (stderr, "EOF reading PID from bus daemon\n");
exit (1);
break;
case READ_STATUS_ERROR:
fprintf (stderr, "Error reading PID from bus daemon: %s\n",
strerror (errno));
exit (1);
break;
}
end = NULL;
val = strtol (buf, &end, 0);
if (buf == end || end == NULL)
{
fprintf (stderr, "Failed to parse bus PID \"%s\": %s\n",
buf, strerror (errno));
exit (1);
}
bus_pid = val;
/* Have to initialize bus_pid_to_kill ASAP, so that the
X error callback can kill it if an error happens. */
bus_pid_to_kill = bus_pid;
close (bus_pid_to_launcher_pipe[READ_END]);
#ifdef DBUS_ENABLE_X11_AUTOLAUNCH
if (xdisplay != NULL)
{
int ret2;
verbose("Saving x11 address\n");
ret2 = x11_save_address (bus_address, bus_pid, &wid);
/* Only get an existing dbus session when autolaunching */
if (autolaunch)
{
if (ret2 == 0)
{
char *address = NULL;
/* another window got added. Return its address */
if (x11_get_address (&address, &bus_pid, &wid)
&& address != NULL)
{
verbose ("dbus-daemon is already running. Returning existing parameters.\n");
/* Kill the old bus */
kill_bus();
pass_info (runprog, address, bus_pid, wid,
c_shell_syntax, bourne_shell_syntax, binary_syntax,
argc, argv, remaining_args);
}
}
if (ret2 < 0)
{
fprintf (stderr, "Error saving bus information.\n");
bus_pid_to_kill = bus_pid;
kill_bus_and_exit (1);
}
}
}
#endif
/* Forward the pid to the babysitter */
write_pid (bus_pid_to_babysitter_pipe[WRITE_END], bus_pid);
close (bus_pid_to_babysitter_pipe[WRITE_END]);
pass_info (runprog, bus_address, bus_pid, wid, c_shell_syntax,
bourne_shell_syntax, binary_syntax, argc, argv, remaining_args);
}
return 0;
}
static void
kill_bus_when_session_ends (void)
{
int tty_fd;
int x_fd;
fd_set read_set;
fd_set err_set;
struct sigaction act;
sigset_t empty_mask;
/* install SIGHUP handler */
got_sighup = FALSE;
sigemptyset (&empty_mask);
act.sa_handler = signal_handler;
act.sa_mask = empty_mask;
act.sa_flags = 0;
sigaction (SIGHUP, &act, NULL);
sigaction (SIGTERM, &act, NULL);
sigaction (SIGINT, &act, NULL);
#ifdef DBUS_BUILD_X11
x11_init();
if (xdisplay != NULL)
{
x_fd = ConnectionNumber (xdisplay);
}
else
x_fd = -1;
#else
x_fd = -1;
#endif
if (isatty (0))
tty_fd = 0;
else
tty_fd = -1;
if (x_fd >= 0)
{
verbose ("session lifetime is defined by X, not monitoring stdin\n");
tty_fd = -1;
}
else if (tty_fd >= 0)
{
verbose ("stdin isatty(), monitoring it\n");
}
else
{
verbose ("stdin was not a TTY, not monitoring it\n");
}
if (tty_fd < 0 && x_fd < 0)
{
fprintf (stderr, "No terminal on standard input and no X display; cannot attach message bus to session lifetime\n");
kill_bus_and_exit (1);
}
while (TRUE)
{
#ifdef DBUS_BUILD_X11
/* Dump events on the floor, and let
* IO error handler run if we lose
* the X connection. It's important to
* run this before going into select() since
* we might have queued outgoing messages or
* events.
*/
x11_handle_event ();
#endif
FD_ZERO (&read_set);
FD_ZERO (&err_set);
if (tty_fd >= 0)
{
FD_SET (tty_fd, &read_set);
FD_SET (tty_fd, &err_set);
}
if (x_fd >= 0)
{
FD_SET (x_fd, &read_set);
FD_SET (x_fd, &err_set);
}
select (MAX (tty_fd, x_fd) + 1,
&read_set, NULL, &err_set, NULL);
if (got_sighup)
{
verbose ("Got SIGHUP, exiting\n");
kill_bus_and_exit (0);
}
#ifdef DBUS_BUILD_X11
/* Events will be processed before we select again
*/
if (x_fd >= 0)
verbose ("X fd condition reading = %d error = %d\n",
FD_ISSET (x_fd, &read_set),
FD_ISSET (x_fd, &err_set));
#endif
if (tty_fd >= 0)
{
if (FD_ISSET (tty_fd, &read_set))
{
int bytes_read;
char discard[512];
verbose ("TTY ready for reading\n");
bytes_read = read (tty_fd, discard, sizeof (discard));
verbose ("Read %d bytes from TTY errno = %d\n",
bytes_read, errno);
if (bytes_read == 0)
kill_bus_and_exit (0); /* EOF */
else if (bytes_read < 0 && errno != EINTR)
{
/* This shouldn't happen I don't think; to avoid
* spinning on the fd forever we exit.
*/
fprintf (stderr, "dbus-launch: error reading from stdin: %s\n",
strerror (errno));
kill_bus_and_exit (0);
}
}
else if (FD_ISSET (tty_fd, &err_set))
{
verbose ("TTY has error condition\n");
kill_bus_and_exit (0);
}
}
}
}
static void
kill_bus_when_session_ends (void)
{
int tty_fd;
int x_fd;
fd_set read_set;
fd_set err_set;
int ret;
struct sigaction act;
sigset_t empty_mask;
#ifdef DBUS_BUILD_X11
Display *xdisplay;
#endif
/* install SIGHUP handler */
got_sighup = FALSE;
sigemptyset (&empty_mask);
act.sa_handler = signal_handler;
act.sa_mask = empty_mask;
act.sa_flags = 0;
sigaction (SIGHUP, &act, 0);
#ifdef DBUS_BUILD_X11
xdisplay = XOpenDisplay (NULL);
if (xdisplay != NULL)
{
verbose ("Successfully opened X display\n");
x_fd = ConnectionNumber (xdisplay);
XSetIOErrorHandler (x_io_error_handler);
}
else
x_fd = -1;
#else
verbose ("Compiled without X11 support\n");
x_fd = -1;
#endif
if (isatty (0))
tty_fd = 0;
else
tty_fd = -1;
if (tty_fd >= 0)
verbose ("stdin isatty(), monitoring it\n");
else
verbose ("stdin was not a TTY, not monitoring it\n");
if (tty_fd < 0 && x_fd < 0)
{
fprintf (stderr, "No terminal on standard input and no X display; cannot attach message bus to session lifetime\n");
exit (1);
}
while (TRUE)
{
FD_ZERO (&read_set);
FD_ZERO (&err_set);
if (tty_fd >= 0)
{
FD_SET (tty_fd, &read_set);
FD_SET (tty_fd, &err_set);
}
if (x_fd >= 0)
{
FD_SET (x_fd, &read_set);
FD_SET (x_fd, &err_set);
}
ret = select (MAX (tty_fd, x_fd) + 1,
&read_set, NULL, &err_set, NULL);
if (got_sighup)
{
verbose ("Got SIGHUP, exiting\n");
kill_bus_and_exit ();
}
#ifdef DBUS_BUILD_X11
/* Dump events on the floor, and let
* IO error handler run if we lose
* the X connection
*/
if (x_fd >= 0)
verbose ("X fd condition reading = %d error = %d\n",
FD_ISSET (x_fd, &read_set),
FD_ISSET (x_fd, &err_set));
if (xdisplay != NULL)
{
while (XPending (xdisplay))
{
XEvent ignored;
XNextEvent (xdisplay, &ignored);
}
}
#endif
if (tty_fd >= 0)
{
if (FD_ISSET (tty_fd, &read_set))
{
int bytes_read;
char discard[512];
verbose ("TTY ready for reading\n");
bytes_read = read (tty_fd, discard, sizeof (discard));
verbose ("Read %d bytes from TTY errno = %d\n",
bytes_read, errno);
if (bytes_read == 0)
kill_bus_and_exit (); /* EOF */
else if (bytes_read < 0 && errno != EINTR)
{
/* This shouldn't happen I don't think; to avoid
* spinning on the fd forever we exit.
*/
fprintf (stderr, "dbus-launch: error reading from stdin: %s\n",
strerror (errno));
kill_bus_and_exit ();
}
}
else if (FD_ISSET (tty_fd, &err_set))
{
verbose ("TTY has error condition\n");
kill_bus_and_exit ();
}
}
}
}
int
main (int argc, char **argv)
{
const char *prev_arg;
const char *shname;
const char *runprog = NULL;
int remaining_args = 0;
int exit_with_session;
int binary_syntax = FALSE;
int c_shell_syntax = FALSE;
int bourne_shell_syntax = FALSE;
int auto_shell_syntax = FALSE;
int autolaunch = FALSE;
int requires_arg = FALSE;
int close_stderr = FALSE;
int i;
int ret;
int bus_pid_to_launcher_pipe[2];
int bus_pid_to_babysitter_pipe[2];
int bus_address_to_launcher_pipe[2];
char *config_file;
exit_with_session = FALSE;
config_file = NULL;
prev_arg = NULL;
i = 1;
while (i < argc)
{
const char *arg = argv[i];
if (strcmp (arg, "--help") == 0 ||
strcmp (arg, "-h") == 0 ||
strcmp (arg, "-?") == 0)
usage (0);
else if (strcmp (arg, "--auto-syntax") == 0)
auto_shell_syntax = TRUE;
else if (strcmp (arg, "-c") == 0 ||
strcmp (arg, "--csh-syntax") == 0)
c_shell_syntax = TRUE;
else if (strcmp (arg, "-s") == 0 ||
strcmp (arg, "--sh-syntax") == 0)
bourne_shell_syntax = TRUE;
else if (strcmp (arg, "--binary-syntax") == 0)
binary_syntax = TRUE;
else if (strcmp (arg, "--version") == 0)
version ();
else if (strcmp (arg, "--exit-with-session") == 0)
exit_with_session = TRUE;
else if (strcmp (arg, "--close-stderr") == 0)
close_stderr = TRUE;
else if (strstr (arg, "--autolaunch=") == arg)
{
const char *s;
if (autolaunch)
{
fprintf (stderr, "--autolaunch given twice\n");
exit (1);
}
autolaunch = TRUE;
s = strchr (arg, '=');
++s;
save_machine_uuid (s);
}
else if (prev_arg &&
strcmp (prev_arg, "--autolaunch") == 0)
{
if (autolaunch)
{
fprintf (stderr, "--autolaunch given twice\n");
exit (1);
}
autolaunch = TRUE;
save_machine_uuid (arg);
requires_arg = FALSE;
}
else if (strcmp (arg, "--autolaunch") == 0)
requires_arg = TRUE;
else if (strstr (arg, "--config-file=") == arg)
{
const char *file;
if (config_file != NULL)
{
fprintf (stderr, "--config-file given twice\n");
exit (1);
}
file = strchr (arg, '=');
++file;
config_file = xstrdup (file);
}
else if (prev_arg &&
strcmp (prev_arg, "--config-file") == 0)
{
if (config_file != NULL)
{
fprintf (stderr, "--config-file given twice\n");
exit (1);
}
config_file = xstrdup (arg);
requires_arg = FALSE;
}
else if (strcmp (arg, "--config-file") == 0)
requires_arg = TRUE;
else if (arg[0] == '-')
{
if (strcmp (arg, "--") != 0)
{
fprintf (stderr, "Option `%s' is unknown.\n", arg);
exit (1);
}
else
{
runprog = argv[i+1];
remaining_args = i+2;
break;
}
}
else
{
runprog = arg;
remaining_args = i+1;
break;
}
prev_arg = arg;
++i;
}
if (requires_arg)
{
fprintf (stderr, "Option `%s' requires an argument.\n", prev_arg);
exit (1);
}
if (auto_shell_syntax)
{
if ((shname = getenv ("SHELL")) != NULL)
{
if (!strncmp (shname + strlen (shname) - 3, "csh", 3))
c_shell_syntax = TRUE;
else
bourne_shell_syntax = TRUE;
}
else
bourne_shell_syntax = TRUE;
}
if (exit_with_session)
verbose ("--exit-with-session enabled\n");
if (autolaunch)
{
#ifndef DBUS_BUILD_X11
fprintf (stderr, "Autolaunch requested, but X11 support not compiled in.\n"
"Cannot continue.\n");
exit (1);
#else
char *address;
pid_t pid;
long wid;
if (get_machine_uuid () == NULL)
{
fprintf (stderr, "Machine UUID not provided as arg to --autolaunch\n");
exit (1);
}
/* FIXME right now autolaunch always does print_variables(), but it should really
* exec the child program instead if a child program was specified. For now
* we just exit if this conflict arises.
*/
if (runprog)
{
fprintf (stderr, "Currently --autolaunch does not support running a program\n");
exit (1);
}
verbose ("Autolaunch enabled (using X11).\n");
if (!exit_with_session)
{
verbose ("--exit-with-session automatically enabled\n");
exit_with_session = TRUE;
}
if (!x11_init ())
{
fprintf (stderr, "Autolaunch error: X11 initialization failed.\n");
exit (1);
}
if (!x11_get_address (&address, &pid, &wid))
{
fprintf (stderr, "Autolaunch error: X11 communication error.\n");
exit (1);
}
if (address != NULL)
{
verbose ("dbus-daemon is already running. Returning existing parameters.\n");
print_variables (address, pid, wid, c_shell_syntax,
bourne_shell_syntax, binary_syntax);
exit (0);
}
#endif
}
if (pipe (bus_pid_to_launcher_pipe) < 0 ||
pipe (bus_address_to_launcher_pipe) < 0 ||
pipe (bus_pid_to_babysitter_pipe) < 0)
{
fprintf (stderr,
"Failed to create pipe: %s\n",
strerror (errno));
exit (1);
}
ret = fork ();
if (ret < 0)
{
fprintf (stderr, "Failed to fork: %s\n",
strerror (errno));
exit (1);
}
if (ret == 0)
{
/* Child */
#define MAX_FD_LEN 64
char write_pid_fd_as_string[MAX_FD_LEN];
char write_address_fd_as_string[MAX_FD_LEN];
if (close_stderr)
do_close_stderr ();
verbose ("=== Babysitter's intermediate parent created\n");
/* Fork once more to create babysitter */
ret = fork ();
if (ret < 0)
{
fprintf (stderr, "Failed to fork: %s\n",
strerror (errno));
exit (1);
}
if (ret > 0)
{
/* In babysitter */
verbose ("=== Babysitter's intermediate parent continues\n");
close (bus_pid_to_launcher_pipe[READ_END]);
close (bus_pid_to_launcher_pipe[WRITE_END]);
close (bus_address_to_launcher_pipe[READ_END]);
close (bus_address_to_launcher_pipe[WRITE_END]);
close (bus_pid_to_babysitter_pipe[WRITE_END]);
/* babysit() will fork *again*
* and will also reap the pre-forked bus
* daemon
*/
babysit (exit_with_session, ret,
bus_pid_to_babysitter_pipe[READ_END]);
exit (0);
}
verbose ("=== Bus exec process created\n");
/* Now we are the bus process (well, almost;
* dbus-daemon itself forks again)
*/
close (bus_pid_to_launcher_pipe[READ_END]);
close (bus_address_to_launcher_pipe[READ_END]);
close (bus_pid_to_babysitter_pipe[READ_END]);
close (bus_pid_to_babysitter_pipe[WRITE_END]);
sprintf (write_pid_fd_as_string,
"%d", bus_pid_to_launcher_pipe[WRITE_END]);
sprintf (write_address_fd_as_string,
"%d", bus_address_to_launcher_pipe[WRITE_END]);
verbose ("Calling exec()\n");
#ifdef DBUS_BUILD_TESTS
/* exec from testdir */
if (getenv("DBUS_USE_TEST_BINARY") != NULL)
{
execl (TEST_BUS_BINARY,
TEST_BUS_BINARY,
"--fork",
"--print-pid", write_pid_fd_as_string,
"--print-address", write_address_fd_as_string,
config_file ? "--config-file" : "--session",
config_file, /* has to be last in this varargs list */
NULL);
fprintf (stderr,
"Failed to execute test message bus daemon %s: %s. Will try again with the system path.\n",
TEST_BUS_BINARY, strerror (errno));
}
#endif /* DBUS_BUILD_TESTS */
execl (DBUS_DAEMONDIR"/dbus-daemon",
DBUS_DAEMONDIR"/dbus-daemon",
"--fork",
"--print-pid", write_pid_fd_as_string,
"--print-address", write_address_fd_as_string,
config_file ? "--config-file" : "--session",
config_file, /* has to be last in this varargs list */
NULL);
fprintf (stderr,
"Failed to execute message bus daemon %s: %s. Will try again without full path.\n",
DBUS_DAEMONDIR"/dbus-daemon", strerror (errno));
/*
* If it failed, try running without full PATH. Note this is needed
* because the build process builds the run-with-tmp-session-bus.conf
* file and the dbus-daemon will not be in the install location during
* build time.
*/
execlp ("dbus-daemon",
"dbus-daemon",
"--fork",
"--print-pid", write_pid_fd_as_string,
"--print-address", write_address_fd_as_string,
config_file ? "--config-file" : "--session",
config_file, /* has to be last in this varargs list */
NULL);
fprintf (stderr,
"Failed to execute message bus daemon: %s\n",
strerror (errno));
exit (1);
}
else
{
/* Parent */
#define MAX_PID_LEN 64
pid_t bus_pid;
char bus_address[MAX_ADDR_LEN];
char buf[MAX_PID_LEN];
char *end;
long wid = 0;
long val;
int ret2;
verbose ("=== Parent dbus-launch continues\n");
close (bus_pid_to_launcher_pipe[WRITE_END]);
close (bus_address_to_launcher_pipe[WRITE_END]);
close (bus_pid_to_babysitter_pipe[READ_END]);
verbose ("Waiting for babysitter's intermediate parent\n");
/* Immediately reap parent of babysitter
* (which was created just for us to reap)
*/
if (do_waitpid (ret) < 0)
{
fprintf (stderr, "Failed to waitpid() for babysitter intermediate process: %s\n",
strerror (errno));
exit (1);
}
verbose ("Reading address from bus\n");
/* Read the pipe data, print, and exit */
switch (read_line (bus_address_to_launcher_pipe[READ_END],
bus_address, MAX_ADDR_LEN))
{
case READ_STATUS_OK:
break;
case READ_STATUS_EOF:
fprintf (stderr, "EOF in dbus-launch reading address from bus daemon\n");
exit (1);
break;
case READ_STATUS_ERROR:
fprintf (stderr, "Error in dbus-launch reading address from bus daemon: %s\n",
strerror (errno));
exit (1);
break;
}
close (bus_address_to_launcher_pipe[READ_END]);
verbose ("Reading PID from daemon\n");
/* Now read data */
switch (read_line (bus_pid_to_launcher_pipe[READ_END], buf, MAX_PID_LEN))
{
case READ_STATUS_OK:
break;
case READ_STATUS_EOF:
fprintf (stderr, "EOF reading PID from bus daemon\n");
exit (1);
break;
case READ_STATUS_ERROR:
fprintf (stderr, "Error reading PID from bus daemon: %s\n",
strerror (errno));
exit (1);
break;
}
end = NULL;
val = strtol (buf, &end, 0);
if (buf == end || end == NULL)
{
fprintf (stderr, "Failed to parse bus PID \"%s\": %s\n",
buf, strerror (errno));
exit (1);
}
bus_pid = val;
close (bus_pid_to_launcher_pipe[READ_END]);
#ifdef DBUS_BUILD_X11
/* FIXME the runprog == NULL is broken - we need to launch the runprog with the existing bus,
* instead of just doing print_variables() if there's an existing bus.
*/
if (xdisplay != NULL && runprog == NULL)
{
ret2 = x11_save_address (bus_address, bus_pid, &wid);
if (ret2 == 0)
{
/* another window got added. Return its address */
char *address;
pid_t pid;
long wid;
if (x11_get_address (&address, &pid, &wid) && address != NULL)
{
verbose ("dbus-daemon is already running. Returning existing parameters.\n");
print_variables (address, pid, wid, c_shell_syntax,
bourne_shell_syntax, binary_syntax);
free (address);
bus_pid_to_kill = bus_pid;
kill_bus_and_exit (0);
}
/* if failed, fall through */
}
if (ret2 <= 0)
{
fprintf (stderr, "Error saving bus information.\n");
bus_pid_to_kill = bus_pid;
kill_bus_and_exit (1);
}
}
#endif
/* Forward the pid to the babysitter */
write_pid (bus_pid_to_babysitter_pipe[WRITE_END], bus_pid);
close (bus_pid_to_babysitter_pipe[WRITE_END]);
if (runprog)
{
char *envvar;
char **args;
envvar = malloc (strlen ("DBUS_SESSION_BUS_ADDRESS=") + strlen (bus_address) + 1);
args = malloc (sizeof (char *) * ((argc-remaining_args)+2));
if (envvar == NULL || args == NULL)
goto oom;
args[0] = xstrdup (runprog);
if (!args[0])
goto oom;
for (i = 1; i <= (argc-remaining_args); i++)
{
size_t len = strlen (argv[remaining_args+i-1])+1;
args[i] = malloc (len);
if (!args[i])
goto oom;
strncpy (args[i], argv[remaining_args+i-1], len);
}
args[i] = NULL;
strcpy (envvar, "DBUS_SESSION_BUS_ADDRESS=");
strcat (envvar, bus_address);
putenv (envvar);
execvp (runprog, args);
fprintf (stderr, "Couldn't exec %s: %s\n", runprog, strerror (errno));
exit (1);
}
else
{
print_variables (bus_address, bus_pid, wid, c_shell_syntax,
bourne_shell_syntax, binary_syntax);
}
verbose ("dbus-launch exiting\n");
fflush (stdout);
fflush (stderr);
close (1);
close (2);
exit (0);
}
return 0;
oom:
fprintf (stderr, "Out of memory!");
exit (1);
}
