[PATCH 3/2] common/xfs: work around a hang-on-stdin bug in xfs_admin 5.11

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From: Darrick J. Wong <djwong@xxxxxxxxxx>

xfs_admin in xfsprogs 5.11 has a bug wherein a caller who specifies an
external log device forces xfs_db to be invoked, potentially with zero
command arguments.  When this happens, xfs_db will wait for input on
stdin, which causes fstests to hang.  Since xfs_admin is not an
interactive tool, redirect stdin from /dev/null to prevent this issue.

Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
 common/xfs |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/common/xfs b/common/xfs
index 06989d1c..d2173129 100644
--- a/common/xfs
+++ b/common/xfs
@@ -277,7 +277,13 @@ _scratch_xfs_admin()
 			_notrun 'xfs_admin does not support rt devices'
 		rt_opts+=(-r "$SCRATCH_RTDEV")
 	fi
-	$XFS_ADMIN_PROG "${rt_opts[@]}" "$@" "${options[@]}"
+
+	# xfs_admin in xfsprogs 5.11 has a bug where an external log device
+	# forces xfs_db to be invoked, potentially with zero command arguments.
+	# When this happens, xfs_db will wait for input on stdin, which causes
+	# fstests to hang.  Since xfs_admin is not an interactive tool, we
+	# can redirect stdin from /dev/null to prevent this issue.
+	$XFS_ADMIN_PROG "${rt_opts[@]}" "$@" "${options[@]}" < /dev/null
 }
 
 _scratch_xfs_logprint()



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