more robust optional offset mount

diff --git a/gnt-lv-snap-rsync.sh b/gnt-lv-snap-rsync.sh
index 6c37329..804dbe0 100755 (executable)
--- a/gnt-lv-snap-rsync.sh
+++ b/gnt-lv-snap-rsync.sh
@@ -27,12 +27,10 @@ cat <<__SHELL__ > /dev/shm/$instance.sh
 
        mkdir /dev/shm/$lv.snap
 
-       sleep 1
-
        # we must mount filesystem read-write to allow journal recovery
-       mount /dev/ffzgvg/$lv.snap /dev/shm/$lv.snap -o noatime \
-       || offset=\`fdisk -l /dev/ffzgvg/$lv.snap -u | grep Linux$ | grep /dev/ffzgvg/$lv.snap | head -1 | sed 's/\*/ /' | awk '{ print \$2 * 512 }'\` \
-       && mount /dev/ffzgvg/$lv.snap /dev/shm/$lv.snap -o noatime,offset=\$offset \
+       offset=\`fdisk -l /dev/ffzgvg/$lv.snap -u | grep Linux$ | grep /dev/ffzgvg/$lv.snap | head -1 | sed 's/\*/ /' | awk '{ print \$2 * 512 }'\`
+       test ! -z "\$offset" && offset=",offset=\$offset"
+       mount /dev/ffzgvg/$lv.snap /dev/shm/$lv.snap -o noatime\$offset
 
        rsync -ravHz --numeric-ids --sparse --delete /dev/shm/$lv.snap/ lib15::backup/$instance/$disk_nr/