[PATCH] xfs/077: fix test for userspace meta_uuid support

[PATCH] xfs/077: fix test for userspace meta_uuid support

[Eric Sandeen]

The current _require_meta_uuid() test looks for a failure return
code from xfs_db -x -c "uuid generate" but in fact this exits
with success.  (In fact uuid_f always exits with success; perhaps
this needs fixing, but that's in the wild now).

So grep for the string(s) stating that it failed, instead.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
---

diff --git a/common/rc b/common/rc
index 70d2fa8..737a701 100644
--- a/common/rc
+++ b/common/rc
@@ -2720,8 +2720,11 @@ _require_meta_uuid()
 	# This will create a crc fs on $SCRATCH_DEV
 	_require_xfs_crc
 
-	$XFS_DB_PROG -x -c "uuid generate" $SCRATCH_DEV >/dev/null 2>&1 \
-	   || _notrun "Userspace doesn't support meta_uuid feature"
+	$XFS_DB_PROG -x -c "uuid restore" $SCRATCH_DEV 2>&1 \
+	   | grep -q "invalid UUID\|supported on V5 fs" \
+	   && _notrun "Userspace doesn't support meta_uuid feature"
+
+	$XFS_DB_PROG -x -c "uuid generate" $SCRATCH_DEV >/dev/null 2>&1
 
 	_scratch_mount >/dev/null 2>&1 \
 	   || _notrun "Kernel doesn't support meta_uuid feature"