libudev: queue - use lstat() to check existence of symlink

[elogind.git] / udev / lib / libudev-queue.c

diff --git a/udev/lib/libudev-queue.c b/udev/lib/libudev-queue.c
index 28d877749d7a6bf894206bc1331905d128eacbc0..7ec22370104830db6fe88b5589b3bad7ad5f5029 100644 (file)
--- a/udev/lib/libudev-queue.c
+++ b/udev/lib/libudev-queue.c
@@ -133,6 +133,20 @@ unsigned long long int udev_queue_get_udev_seqnum(struct udev_queue *udev_queue)
        return seqnum;
 }
 
+int udev_queue_get_udev_is_active(struct udev_queue *udev_queue)
+{
+       char filename[UTIL_PATH_SIZE];
+       struct stat statbuf;
+
+       if (udev_queue == NULL)
+               return 0;
+       util_strlcpy(filename, udev_get_dev_path(udev_queue->udev), sizeof(filename));
+       util_strlcat(filename, "/.udev/uevent_seqnum", sizeof(filename));
+       if (stat(filename, &statbuf) == 0)
+               return 1;
+       return 0;
+}
+
 int udev_queue_get_queue_is_empty(struct udev_queue *udev_queue)
 {
        char queuename[UTIL_PATH_SIZE];
@@ -152,7 +166,10 @@ int udev_queue_get_queue_is_empty(struct udev_queue *udev_queue)
                dbg(udev_queue->udev, "queue is empty\n");
                return 1;
        }
-       udev_queue_get_udev_seqnum(udev_queue);
+       /* update udev seqnum, and check if udev is still running */
+       if (udev_queue_get_udev_seqnum(udev_queue) == 0)
+               if (!udev_queue_get_udev_is_active(udev_queue))
+                       return 1;
        if (seqnum_kernel <= udev_queue->last_seen_udev_seqnum) {
                dbg(udev_queue->udev, "queue is empty\n");
                return 1;
@@ -177,7 +194,7 @@ int udev_queue_get_seqnum_is_finished(struct udev_queue *udev_queue, unsigned lo
        }
        snprintf(filename, sizeof(filename), "%s/.udev/queue/%llu",
                 udev_get_dev_path(udev_queue->udev), seqnum);
-       if (stat(filename, &statbuf) == 0)
+       if (lstat(filename, &statbuf) == 0)
                return 0;
        dbg(udev_queue->udev, "seqnum: %llu finished\n", seqnum);
        return 1;