libzfs: Auto prepend /dev/ in zpool_find_vdev

Restores functionality that has been in FreeBSD since 2007.

Signed-off-by: Ryan Moeller <[email protected]>

lib/libzfs/libzfs_pool.c

@@ -2914,6 +2914,7 @@ nvlist_t *
 zpool_find_vdev(zpool_handle_t *zhp, const char *path, boolean_t *avail_spare,
     boolean_t *l2cache, boolean_t *log)
 {
+	char buf[MAXPATHLEN];
 	char *end;
 	nvlist_t *nvroot, *search, *ret;
 	uint64_t guid;
@@ -2925,6 +2926,9 @@ zpool_find_vdev(zpool_handle_t *zhp, const char *path, boolean_t *avail_spare,
 		fnvlist_add_uint64(search, ZPOOL_CONFIG_GUID, guid);
 	} else if (zpool_vdev_is_interior(path)) {
 		fnvlist_add_string(search, ZPOOL_CONFIG_TYPE, path);
+	} else if (path[0] != '/' &&
+	    zfs_resolve_shortname(path, buf, sizeof (buf)) == 0) {
+		fnvlist_add_string(search, ZPOOL_CONFIG_PATH, buf);
 	} else {
 		fnvlist_add_string(search, ZPOOL_CONFIG_PATH, path);
 	}