From 7b6f0a768b0231419c761468093ea1b9bde03b42 Mon Sep 17 00:00:00 2001
From: Alexander Schmidt <alex@treefish.org>
Date: Tue, 21 Oct 2014 10:03:44 +0200
Subject: [PATCH] Made ssh calls 255 aware.

---
 backmeupscotty | 33 +++++++++++++++++++++------------
 1 file changed, 21 insertions(+), 12 deletions(-)

diff --git a/backmeupscotty b/backmeupscotty
index 4f0dc9a..df18802 100644
--- a/backmeupscotty
+++ b/backmeupscotty
@@ -18,12 +18,24 @@ function scottyerror {
     echo $(upperme): $@ >&2 
 }
 
+function ssh255 {
+    ssh $@
+    sshret=$?
+
+    if [ $sshret -eq 255 ]; then
+	scottyerror "SSH connection failed!"
+	exit 1
+    else
+	return $sshret
+    fi
+}
+
 function grepbackups {
-    ssh $REMOTE_HOST "ls $REMOTE_DIR" | grep -E '[0-9]+-[0-9]+'
+    ssh255 $REMOTE_HOST "ls $REMOTE_DIR" | grep -E '[0-9]+-[0-9]+'
 }
 
 function isIncomplete {
-    if ( ssh $REMOTE_HOST '[ -d '$REMOTE_DIR/incomplete' ]' ); then
+    if ( ssh255 $REMOTE_HOST '[ -d '$REMOTE_DIR/incomplete' ]' ); then
 	return 0
     else
 	return 1
@@ -78,9 +90,9 @@ function scottysync {
 	rsync_exclude=$(eval echo --exclude={$SYNC_EXC} | tr -d {})
     fi
 
-    if (ssh $REMOTE_HOST '[ ! -d '$REMOTE_DIR' ]'); then
+    if (ssh255 $REMOTE_HOST '[ ! -d '$REMOTE_DIR' ]'); then
 	scottyinfo Creating destination directory $REMOTE_HOST:$REMOTE_DIR
-	ssh $REMOTE_HOST "mkdir $REMOTE_DIR"
+	ssh255 $REMOTE_HOST "mkdir $REMOTE_DIR"
     fi
 
     if isIncomplete; then
@@ -96,7 +108,7 @@ function scottysync {
     
     if [ $? -eq 0 ]; then
 	scottyinfo Timestamping completed backup and linking to current backup
-	ssh $REMOTE_HOST \
+	ssh255 $REMOTE_HOST \
 	    "mv $dir_incomplete $dir_timestamped && rm -f $dir_current && ln -s $(basename $dir_timestamped) $dir_current"
     fi
 
@@ -106,7 +118,7 @@ function scottysync {
 
 	if [ $oldestbackuptstamp -lt $(( $(date +%s) - $ARCHIVE_KEEPNDAYS*60*60*24 )) ]; then
 	    scottyinfo Removing old backup $oldestbackup
-	    ssh $REMOTE_HOST rm -r "$REMOTE_DIR/$oldestbackup"
+	    ssh255 $REMOTE_HOST rm -r "$REMOTE_DIR/$oldestbackup"
 	else
 	    break
 	fi
@@ -177,12 +189,9 @@ function backmeupscotty {
                 ;;
 	esac
     done
-
-    if (! ssh $REMOTE_HOST exit); then
-	scottyerror "Could not establish SSH connection to $REMOTE_HOST!"
-	exit 1
-    fi
-
+    
+    ssh255 $REMOTE_HOST exit
+    
     if isNthDay; then
 	scottyinfo "This is the nth day."
     elif latestTooOld; then
-- 
2.39.5