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Diffstat (limited to 'src/libsystemd-bus/sd-event.c')
-rw-r--r--src/libsystemd-bus/sd-event.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/src/libsystemd-bus/sd-event.c b/src/libsystemd-bus/sd-event.c
index 65ee12d5ff..2b75c6ae9c 100644
--- a/src/libsystemd-bus/sd-event.c
+++ b/src/libsystemd-bus/sd-event.c
@@ -1036,6 +1036,42 @@ _public_ int sd_event_source_get_io_fd(sd_event_source *s) {
return s->io.fd;
}
+_public_ int sd_event_source_set_io_fd(sd_event_source *s, int fd) {
+ int r;
+
+ assert_return(s, -EINVAL);
+ assert_return(fd >= 0, -EINVAL);
+ assert_return(s->type == SOURCE_IO, -EDOM);
+ assert_return(!event_pid_changed(s->event), -ECHILD);
+
+ if (s->io.fd == fd)
+ return 0;
+
+ if (s->enabled == SD_EVENT_OFF) {
+ s->io.fd = fd;
+ s->io.registered = false;
+ } else {
+ int saved_fd;
+
+ saved_fd = s->io.fd;
+ assert(s->io.registered);
+
+ s->io.fd = fd;
+ s->io.registered = false;
+
+ r = source_io_register(s, s->enabled, s->io.events);
+ if (r < 0) {
+ s->io.fd = saved_fd;
+ s->io.registered = true;
+ return r;
+ }
+
+ epoll_ctl(s->event->epoll_fd, EPOLL_CTL_DEL, saved_fd, NULL);
+ }
+
+ return 0;
+}
+
_public_ int sd_event_source_get_io_events(sd_event_source *s, uint32_t* events) {
assert_return(s, -EINVAL);
assert_return(events, -EINVAL);