From b2ba87f7a0c6be61c2f73b686d0f2849869e9fd7 Mon Sep 17 00:00:00 2001
From: Vincent Riquer <v.riquer@b2f-concept.com>
Date: Wed, 14 Mar 2012 09:42:06 +0100
Subject: [PATCH] lock and skip target if lock present

---
 remote-backup | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/remote-backup b/remote-backup
index 39099fa..4052001 100755
--- a/remote-backup
+++ b/remote-backup
@@ -131,8 +131,17 @@ doBackup() {
 	then
 		runBackup emerg.$(date +%Y%m%d%H%M)
 	else
-		rotateBackup
-		runBackup daily.0
+		if [ -f "$SNAPSHOT_RW/$NAME/.lock" ]									\
+		&& [[ $(</proc/$(<"$SNAPSHOT_RW/$NAME/.lock")/comm) = remote-backup ]]
+		then
+			failedBackups+=( "$NAME" )
+			failedReason["$NAME"]=LOCKED
+		else
+			echo $$ > "$SNAPSHOT_RW/$NAME/.lock"
+			rotateBackup
+			runBackup daily.0
+			rm "$SNAPSHOT_RW/$NAME/.lock"
+		fi
 	fi
 
 # now remount the RW snapshot mountpoint as readonly
@@ -323,6 +332,8 @@ then
 			REMOUNT_RW)
 				echo "Target device $more_info could not be mounted ReadWrite."
 			;;
+			LOCKED)
+				echo "Previous backup still running."
 			*)
 				echo "$info $moreinfo"
 			;;