ceph-disk: zap needs at least one device

If given no argument, ceph-disk zap should display the usage instead of
silently doing nothing. Silence can be confused with "I zapped all the
disks".

http://tracker.ceph.com/issues/6981 fixes #6981

Signed-off-by: Loic Dachary <loic@dachary.org>

diff --git a/src/ceph-disk b/src/ceph-disk
index 3709dd2a863fbb97e4b2dce1dcae3d6f8b2e658b..52026d1dcd3dd4aabd444104f704effe0e4111c2 100755 (executable)
--- a/src/ceph-disk
+++ b/src/ceph-disk
@@ -2384,7 +2384,7 @@ def parse_args():
     zap_parser.add_argument(
         'dev',
         metavar='DEV',
-        nargs='*',
+        nargs='+',
         help='path to block device',
         )
     zap_parser.set_defaults(