=== modified file 'sbin/snap.lvm2'
--- sbin/snap.lvm2	2015-12-15 10:18:21 +0000
+++ sbin/snap.lvm2	2015-08-17 13:53:48 +0000
@@ -13,8 +13,8 @@
 LOCKDIR=/var/lock/snaprep
 test -d "$LOCKDIR" || mkdir -p "$LOCKDIR" || exit $?
 LOCKFILE="$LOCKDIR/lvm2.${SRC//\//-}"
-exec 3> "$LOCKFILE" || exit $?
-flock -n 3 || exit $?
+touch "$LOCKFILE" || exit $?
+flock -n 0 <"$LOCKFILE" || exit $?
 if test -b "$S_DEV"; then
 	echo >&2 "removing stale snapshot"
 	if grep -qF "$S_DEV" /proc/mounts; then  # TODO match only on start of line