libudev: record and export "age" of device record

1 files changed, 7 insertions, 0 deletions

diff --git a/udev/udev-event.c b/udev/udev-event.c
index 4d38c5b893..100a79c1e8 100644
--- a/udev/udev-event.c
+++ b/udev/udev-event.c
@@ -643,6 +643,13 @@ int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules)
 			err = udev_node_add(dev, event->mode, event->uid, event->gid);
 		}
 
+		/* preserve old, or get new initialization timestamp */
+		if (event->dev_db != NULL && udev_device_get_usec_initialized(event->dev_db) > 0)
+			udev_device_set_usec_initialized(event->dev, udev_device_get_usec_initialized(event->dev_db));
+		else
+			udev_device_set_usec_initialized(event->dev, usec_monotonic());
+
+		/* (re)write database file */
 		udev_device_update_db(dev);
 		udev_device_tag_index(dev, event->dev_db, true);
 		udev_device_set_is_initialized(dev);