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Make xfs_metadump more robust against bad data
Merge of master-melb:xfs-cmds:29620a by kenmcd.

  Add -m command line option

#!/bin/sh -f
#
# Copyright (c) 2007 Silicon Graphics, Inc.  All Rights Reserved.
#

OPTS=" "
DBOPTS=" "
USAGE="Usage: xfs_metadump [-efogwV] [-m max_extents] [-l logdev] source target"

while getopts "efgl:m:owV" c
do
	case $c in
	e)	OPTS=$OPTS"-e ";;
	g)	OPTS=$OPTS"-g ";;
	m)	OPTS=$OPTS"-m "$OPTARG" ";;
	o)	OPTS=$OPTS"-o ";;
	w)	OPTS=$OPTS"-w ";;
	f)	DBOPTS=$DBOPTS" -f";;
	l)	DBOPTS=$DBOPTS" -l "$OPTARG" ";;
	V)	xfs_db -p xfs_metadump -V
		status=$?
		exit $status
		;;
	\?)	echo $USAGE 1>&2
		exit 2
		;;
	esac
done
set -- extra $@
shift $OPTIND
case $# in
	2)	xfs_db$DBOPTS -i -p xfs_metadump -c "metadump$OPTS $2" $1
		status=$?
		;;
	*)	echo $USAGE 1>&2
		exit 2
		;;
esac
exit $status