sd-bus,sd-event: unify error handling of object descriptions

[elogind.git] / src / libsystemd / sd-event / sd-event.c

diff --git a/src/libsystemd/sd-event/sd-event.c b/src/libsystemd/sd-event/sd-event.c
index f0356a48e647f90711699daf7062852c00b5a595..fb436adc13a971a6bbfebb99caa8cb11f3cb8583 100644 (file)
--- a/src/libsystemd/sd-event/sd-event.c
+++ b/src/libsystemd/sd-event/sd-event.c
@@ -1031,6 +1031,9 @@ _public_ int sd_event_add_signal(
                 }
         }
 
+        /* Use the signal name as description for the event source by default */
+        (void) sd_event_source_set_description(s, signal_to_string(sig));
+
         if (ret)
                 *ret = s;
 
@@ -1255,6 +1258,7 @@ _public_ sd_event_source* sd_event_source_unref(sd_event_source *s) {
 
 _public_ int sd_event_source_set_description(sd_event_source *s, const char *description) {
         assert_return(s, -EINVAL);
+        assert_return(!event_pid_changed(s->event), -ECHILD);
 
         return free_and_strdup(&s->description, description);
 }
@@ -1262,6 +1266,8 @@ _public_ int sd_event_source_set_description(sd_event_source *s, const char *des
 _public_ int sd_event_source_get_description(sd_event_source *s, const char **description) {
         assert_return(s, -EINVAL);
         assert_return(description, -EINVAL);
+        assert_return(s->description, -ENXIO);
+        assert_return(!event_pid_changed(s->event), -ECHILD);
 
         *description = s->description;
         return 0;