Made ssh calls 255 aware.

[backmeupscotty.git] / backmeupscotty

diff --git a/backmeupscotty b/backmeupscotty
index ed41ae2b5a584e03906f3f25d73f92f61d056260..df18802d226b8b3e9079458edf2870a1ecac5912 100644 (file)
--- a/backmeupscotty
+++ b/backmeupscotty
@@ -18,37 +18,32 @@ function scottyerror {
     echo $(upperme): $@ >&2 
 }
 
     echo $(upperme): $@ >&2 
 }
 

-if [ $(pidof -x $(basename $0) | wc -w) -gt 2 ]; then 
-    scottyerror Another instance of $(basename $0) is already running!
-    exit 1
-fi
+function ssh255 {
+    ssh $@
+    sshret=$?

 
 

-while getopts "qn:" opt; do
-    case $opt in
-       q)
-           exec > /dev/null
-           ;;
-       n)
-           BACKUP_RUNEVERYNTHDAY=$OPTARG
-           ;;
-    esac
-done
+    if [ $sshret -eq 255 ]; then
+       scottyerror "SSH connection failed!"
+       exit 1
+    else
+       return $sshret
+    fi
+}

 
 function grepbackups {
 
 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 {
 }
 
 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
     fi
 }
 
        return 0
     else
        return 1
     fi
 }
 

-function isIncompleteOrNthDay {
-    if isIncomplete || \
-       [ $(( ( $(date +%s) / (60*60*24) ) % $BACKUP_RUNEVERYNTHDAY )) -eq 0 ]; 
+function isNthDay {
+    if [ $(( ( $(date +%s) / (60*60*24) ) % $BACKUP_RUNEVERYNTHDAY )) -eq 0 ]; 

     then
        return 0
     else
     then
        return 0
     else


@@ -56,6 +51,20 @@ function isIncompleteOrNthDay {
     fi 
 }
 
     fi 
 }
 

+function latestTooOld {
+    for oldbackup in $(grepbackups); do
+       tstamp=$(echo $oldbackup | cut -d'-' -f1)
+       
+       if [ $(( $(date +%s) - $tstamp )) -lt \
+           $(( $BACKUP_RUNEVERYNTHDAY*24*60*60 )) ]
+       then
+           return 1
+       fi
+    done
+
+    return 0
+}
+

 function scottysync {
     timestamp=$(date +%s)
 
 function scottysync {
     timestamp=$(date +%s)
 


@@ -81,9 +90,9 @@ function scottysync {
        rsync_exclude=$(eval echo --exclude={$SYNC_EXC} | tr -d {})
     fi
 
        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
        scottyinfo Creating destination directory $REMOTE_HOST:$REMOTE_DIR

-       ssh $REMOTE_HOST "mkdir $REMOTE_DIR"
+       ssh255 $REMOTE_HOST "mkdir $REMOTE_DIR"

     fi
 
     if isIncomplete; then
     fi
 
     if isIncomplete; then


@@ -99,7 +108,7 @@ function scottysync {
     
     if [ $? -eq 0 ]; then
        scottyinfo Timestamping completed backup and linking to current backup
     
     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
 
            "mv $dir_incomplete $dir_timestamped && rm -f $dir_current && ln -s $(basename $dir_timestamped) $dir_current"
     fi
 


@@ -109,58 +118,104 @@ function scottysync {
 
        if [ $oldestbackuptstamp -lt $(( $(date +%s) - $ARCHIVE_KEEPNDAYS*60*60*24 )) ]; then
            scottyinfo Removing old backup $oldestbackup
 
        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
     done
 }
 
        else
            break
        fi
     done
 }
 

-function prepare {
-    scottyinfo "Preparing for sync"
+function deleteLock {
+    if ! rmdir /tmp/$(basename $0).lock; then
+       scottyerror "Could not delete lockfile /tmp/$(basename $0).lock!"
+    fi

 }
 
 }
 

-function cleanup_abrt {
-    scottyinfo "No cleanup_abrt function was defined."
+function prepare {
+    scottyinfo "Preparing for sync"

 }
 
 }
 

-function _cleanup_abrt {
+function cleanup_abort {

     scottyerror "Caught exit signal! Cleaning up..."
     scottyerror "Caught exit signal! Cleaning up..."

-    cleanup_abrt
+
+    cleanup ABORT
+

     if [ $(jobs -p) ]; then
        scottyerror TERMinating remaining child processes...
        kill $(jobs -p)
     fi
     if [ $(jobs -p) ]; then
        scottyerror TERMinating remaining child processes...
        kill $(jobs -p)
     fi

+
+    deleteLock
+

     exit
 }
 
     exit
 }
 

-function prepare {
-    scottyinfo "No prepare function was defined."
+function cleanup {
+    scottyinfo "No cleanup function was defined."

 }
 
 }
 

-function _prepare {
-    prepare
+function prepare {
+    scottyinfo "No prepare function was defined."

 }
 
 function cleanup_normal {
 }
 
 function cleanup_normal {

-    scottyinfo "No cleanup_normal function was defined."
+    cleanup
+    deleteLock

 }
 
 }
 

-function _cleanup_normal {
-    cleanup_normal
+function printhelp {
+    cat <<EOF
+Usage: $(basename $0) [OPTION]...
+
+Recognized options:
+  -q   Only output errors
+  -n   Run only on nth day
+  -h   Print out this help
+EOF

 }
 
 function backmeupscotty {
 }
 
 function backmeupscotty {

-    if ! isIncompleteOrNthDay; then
-       scottyinfo "This is not the nth day and no incomplete backup exists."
+    while getopts "qn:h" opt; do
+       case $opt in
+           q)
+               exec > /dev/null
+               ;;
+           n)
+               BACKUP_RUNEVERYNTHDAY=$OPTARG
+               ;;
+           h)
+               printhelp
+                exit 0
+                ;;
+       esac
+    done
+    
+    ssh255 $REMOTE_HOST exit
+    
+    if isNthDay; then
+       scottyinfo "This is the nth day."
+    elif latestTooOld; then
+       scottyinfo "The latest backup is too old."
+    else
+       scottyinfo "No backup has to be done. Exiting."

        exit 0
     fi
 
        exit 0
     fi
 

-    trap _cleanup_abrt EXIT
+    scottyinfo "Performing backup."

 
 

-    _prepare
+    trap cleanup_abort EXIT
+
+    prepare

     scottysync
     scottysync

-    _cleanup_normal

 
 

-    trap - EXIT
+    trap cleanup_normal EXIT
+
+    exit 0

 }
 }

+
+if ! mkdir /tmp/$(basename $0).lock; then
+    scottyerror "Another instance of $(basename $0) is still running!"
+    exit 1
+else
+    trap deleteLock EXIT
+fi