snaprep

commit 5a3f94777afc9c4458eef29689ea7dc36599e0e2
parent bd2997954d66a16334182c635876826ee3d65785
Author: Jan Pobrislo <ccx@webprojekty.cz>
Date:   Tue, 15 Dec 2015 12:44:03 +0100

change locking
Diffstat:
M
sbin/snap.lvm2
 | 
6
++++--

1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/sbin/snap.lvm2 b/sbin/snap.lvm2
@@ -13,8 +13,10 @@ export SNAPSHOT
 LOCKDIR=/var/lock/snaprep
 test -d "$LOCKDIR" || mkdir -p "$LOCKDIR" || exit $?
 LOCKFILE="$LOCKDIR/lvm2.${SRC//\//-}"
-exec 3> "$LOCKFILE" || exit $?
+# exec 3> "$LOCKFILE" || exit $?
+(
 flock -n 3 || exit $?
+echo $$ >&3
 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
@@ -45,5 +47,5 @@ touch $SNAP_SRC/.snapshot.$(date +%s)
 RETCODE=$?
 umount "$SNAPSHOT"
 lvremove -f "$S_VOL"
-rm "$LOCKFILE"
+) 3> "$LOCKFILE"
 exit $RETCODE