btrfs-progs: subvol get-default: fix argument parsing

"sub get-default" does't work since the following commit.

commit 176aeca9a148 ("btrfs-progs: add getopt stubs where needed")

* actual result

   ==================================================
   # ./btrfs sub get-default /btrfs
   btrfs subvolume get-default: too few arguments
   usage: btrfs subvolume get-default <path>

       Get the default subvolume of a filesystem
   ==================================================

* expected result

   ==================================================
   # btrfs sub get-default /btrfs
   ID 5 (FS_TREE)
   ==================================================

Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/cmds-subvolume.c b/cmds-subvolume.c
index 32caaa5..3953d7c 100644 (file)
--- a/cmds-subvolume.c
+++ b/cmds-subvolume.c
@@ -790,7 +790,7 @@ static int cmd_subvol_get_default(int argc, char **argv)
 
        clean_args_no_options(argc, argv, cmd_subvol_get_default_usage);
 
-       if (check_argc_exact(argc - optind, 2))
+       if (check_argc_exact(argc - optind, 1))
                usage(cmd_subvol_get_default_usage);
 
        subvol = argv[1];