udevinfo: allow -a -n <node>

diff --git a/udevinfo.c b/udevinfo.c
index e0ea5fb4ed921df61fe4a3eb6cc2e4408dd67cb7..6b7368119f821ae87d1b949dffc0f1fcd9fd0012 100644 (file)
--- a/udevinfo.c
+++ b/udevinfo.c
@@ -376,12 +376,22 @@ int main(int argc, char *argv[], char *envp[])
                }
                break;
        case ACTION_ATTRIBUTE_WALK:
-               if (path[0] == '\0') {
-                       fprintf(stderr, "attribute walk on device chain needs path(-p) specified\n");
-                       rc = 4;
-                       goto exit;
-               } else
+               if (path[0] != '\0') {
                        print_device_chain(path);
+               } else if (name[0] != '\0') {
+                       char devpath[PATH_SIZE];
+
+                       if (udev_db_lookup_name(name, devpath, sizeof(devpath)) != 0) {
+                               fprintf(stderr, "node name not found\n");
+                               rc = 4;
+                               goto exit;
+                       }
+                       print_device_chain(devpath);
+               } else {
+                       fprintf(stderr, "attribute walk needs device path(-p) or node name(-n) specified\n");
+                       rc = 5;
+                       goto exit;
+               }
                break;
        case ACTION_ROOT:
                printf("%s\n", udev_root);