snaprep

commit 3ec8308c84a5122349a7fb21f55167ca9a0b9b3a
parent e44890cfdd4875cea1040c85badc1d99561185d9
Author: Jan Pobrislo <ccx@webprojekty.cz>
Date:   Fri, 25 Oct 2013 20:35:49 +0200

better error handling
Diffstat:
M
snapshot.lvm2
 | 
16
++++++++++------

1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/snapshot.lvm2 b/snapshot.lvm2
@@ -16,16 +16,20 @@ if test -b "$S_DEV"; then
 	if grep -qF "$S_DEV"; then  # TODO match only on start of line
 		umount $S_DEV || exit $?
 	fi
-	lvremove -f "$S_DEV"
+	lvremove -f "$S_DEV" || exit $?
 fi
 if test -d "$SNAPSHOT"; then
 	# make sure it's empty and unused
-	rmdir "$SNAPSHOT"
+	rmdir "$SNAPSHOT" || exit $?
 fi
-echo $$ >"$LOCKFILE"
-mkdir -p "$SNAPSHOT"
-lvcreate -n "${SRC##*/}.snaprep" -L "${SNAPSHOT_SIZE:-10G}" -s "$SRC"
-mount "$S_DEV" "$SNAPSHOT"
+echo $$ >"$LOCKFILE" || exit $?
+mkdir -p "$SNAPSHOT" || exit $?
+lvcreate -n "${SRC##*/}.snaprep" -L "${SNAPSHOT_SIZE:-10G}" -s "$SRC" || exit $?
+die_lvremove() {
+	lvremove -f "$S_VOL"
+	exit $?
+}
+mount "$S_DEV" "$SNAPSHOT" || die_lvremove $?
 "$@"
 RETCODE=$?
 umount "$SNAPSHOT"