* Depending on the exit code of the helper, set the error accordingly
*/
static void
-handle_activation_exit_error (int exit_code,
- DBusError *error)
+handle_servicehelper_exit_error (int exit_code,
+ DBusError *error)
{
switch (exit_code)
{
BusPendingActivation *pending_activation = data;
dbus_bool_t retval;
DBusBabysitter *babysitter;
+ dbus_bool_t uses_servicehelper;
babysitter = pending_activation->babysitter;
-
+
_dbus_babysitter_ref (babysitter);
-
+
retval = dbus_watch_handle (watch, condition);
+ /* There are two major cases here; are we the system bus or the session? Here this
+ * is distinguished by whether or not we use a setuid helper launcher. With the launch helper,
+ * some process exit codes are meaningful, processed by handle_servicehelper_exit_error.
+ *
+ * In both cases though, just ignore when a process exits with status 0; it's possible for
+ * a program to (misguidedly) "daemonize", and that appears to us as an exit. This closes a race
+ * condition between this code and the child process claiming the bus name.
+ */
+ uses_servicehelper = bus_context_get_servicehelper (pending_activation->activation->context) != NULL;
+
/* FIXME this is broken in the same way that
* connection watches used to be; there should be
* a separate callback for status change, instead
* Fixing this lets us move dbus_watch_handle
* calls into dbus-mainloop.c
*/
-
if (_dbus_babysitter_get_child_exited (babysitter))
{
DBusError error;
DBusHashIter iter;
-
+ dbus_bool_t activation_failed;
+ int exit_code = 0;
+
dbus_error_init (&error);
+
_dbus_babysitter_set_child_exit_error (babysitter, &error);
- /* refine the error code if we got an exit code */
- if (dbus_error_has_name (&error, DBUS_ERROR_SPAWN_CHILD_EXITED))
- {
- int exit_code = 0;
- if (_dbus_babysitter_get_child_exit_status (babysitter, &exit_code))
+ /* Explicitly check for SPAWN_CHILD_EXITED to avoid overwriting an
+ * exec error */
+ if (dbus_error_has_name (&error, DBUS_ERROR_SPAWN_CHILD_EXITED)
+ && _dbus_babysitter_get_child_exit_status (babysitter, &exit_code))
+ {
+ activation_failed = exit_code != 0;
+
+ dbus_error_free(&error);
+
+ if (activation_failed)
{
- dbus_error_free (&error);
- handle_activation_exit_error (exit_code, &error);
+ if (uses_servicehelper)
+ handle_servicehelper_exit_error (exit_code, &error);
+ else
+ _dbus_babysitter_set_child_exit_error (babysitter, &error);
}
- }
-
- /* Destroy all pending activations with the same exec */
- _dbus_hash_iter_init (pending_activation->activation->pending_activations,
- &iter);
- while (_dbus_hash_iter_next (&iter))
+ }
+ else
{
- BusPendingActivation *p = _dbus_hash_iter_get_value (&iter);
-
- if (p != pending_activation && strcmp (p->exec, pending_activation->exec) == 0)
- pending_activation_failed (p, &error);
+ activation_failed = TRUE;
}
-
- /* Destroys the pending activation */
- pending_activation_failed (pending_activation, &error);
- dbus_error_free (&error);
+ if (activation_failed)
+ {
+ /* Destroy all pending activations with the same exec */
+ _dbus_hash_iter_init (pending_activation->activation->pending_activations,
+ &iter);
+ while (_dbus_hash_iter_next (&iter))
+ {
+ BusPendingActivation *p = _dbus_hash_iter_get_value (&iter);
+
+ if (p != pending_activation && strcmp (p->exec, pending_activation->exec) == 0)
+ pending_activation_failed (p, &error);
+ }
+
+ /* Destroys the pending activation */
+ pending_activation_failed (pending_activation, &error);
+
+ dbus_error_free (&error);
+ }
}
-
+
_dbus_babysitter_unref (babysitter);
return retval;
--- /dev/null
+#!/usr/bin/env python
+
+import os,sys
+
+try:
+ import gobject
+ import dbus
+ import dbus.mainloop.glib
+except:
+ print "Failed import, aborting test"
+ sys.exit(0)
+
+dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
+loop = gobject.MainLoop()
+
+exitcode = 0
+
+bus = dbus.SessionBus()
+bus_iface = dbus.Interface(bus.get_object('org.freedesktop.DBus', '/org/freedesktop/DBus'), 'org.freedesktop.DBus')
+
+o = bus.get_object('org.freedesktop.DBus.TestSuiteForkingEchoService', '/org/freedesktop/TestSuite')
+i = dbus.Interface(o, 'org.freedesktop.TestSuite')
+
+# Start it up
+reply = i.Echo("hello world")
+print "TestSuiteForkingEchoService initial reply OK"
+
+def ignore(*args, **kwargs):
+ pass
+
+# Now monitor for exits, when that happens, start it up again.
+# The goal here is to try to hit any race conditions in activation.
+counter = 0
+def on_forking_echo_owner_changed(name, old, new):
+ global counter
+ global o
+ global i
+ if counter > 10:
+ print "Activated 10 times OK, TestSuiteForkingEchoService pass"
+ loop.quit()
+ return
+ counter += 1
+ if new == '':
+ o = bus.get_object('org.freedesktop.DBus.TestSuiteForkingEchoService', '/org/freedesktop/TestSuite')
+ i = dbus.Interface(o, 'org.freedesktop.TestSuite')
+ i.Echo("counter %r" % counter)
+ i.Exit(reply_handler=ignore, error_handler=ignore)
+
+bus_iface.connect_to_signal('NameOwnerChanged', on_forking_echo_owner_changed, arg0='org.freedesktop.DBus.TestSuiteForkingEchoService')
+
+i.Exit(reply_handler=ignore, error_handler=ignore)
+
+def check_counter():
+ if counter == 0:
+ print "Failed to get NameOwnerChanged for TestSuiteForkingEchoService"
+ sys.exit(1)
+gobject.timeout_add(15000, check_counter)
+
+loop.run()
+sys.exit(0)
DBusError error;
int result;
DBusConnection *connection;
-
+ const char *name;
+ dbus_bool_t do_fork;
+
+ if (argc != 3)
+ {
+ name = "org.freedesktop.DBus.TestSuiteEchoService";
+ do_fork = FALSE;
+ }
+ else
+ {
+ name = argv[1];
+ do_fork = strcmp (argv[2], "fork") == 0;
+ }
+
+ /* The bare minimum for simulating a program "daemonizing"; the intent
+ * is to test services which move from being legacy init scripts to
+ * activated services.
+ * https://bugzilla.redhat.com/show_bug.cgi?id=545267
+ */
+ if (do_fork)
+ {
+ pid_t pid = fork ();
+ if (pid != 0)
+ exit (0);
+ sleep (1);
+ }
+
dbus_error_init (&error);
connection = dbus_bus_get (DBUS_BUS_STARTER, &error);
if (connection == NULL)
if (d != (void*) 0xdeadbeef)
die ("dbus_connection_get_object_path_data() doesn't seem to work right\n");
}
-
- result = dbus_bus_request_name (connection, "org.freedesktop.DBus.TestSuiteEchoService",
+
+ result = dbus_bus_request_name (connection, name,
0, &error);
if (dbus_error_is_set (&error))
{
projects / thirdparty / dbus.git / commitdiff
