formatting

[backmeupscotty.git] / backmeupscotty

diff --git a/backmeupscotty b/backmeupscotty
index 44e9c54ae878f3be7eeba2e900a46cb3dcb528e7..d6f358fd63dd8f77adde92d8830af3eb86e1c523 100644 (file)
--- a/backmeupscotty
+++ b/backmeupscotty
@@ -5,17 +5,32 @@ REMOTE_DIR=/tmp/backmeupscotty/test
 ARCHIVE_KEEPNBACKUPS=30
 ARCHIVE_KEEPNDAYS=30
 BACKUP_RUNEVERYNTHDAY=1
+BWLIMIT=500KiB
 
-function upperme {
-    echo $(basename $0) | tr '[:lower:]' '[:upper:]'
+_ERROR_ENCOUNTERED=0
+
+function timestamp {
+    date +'[%y-%m-%d|%H:%M:%S]'
+}
+
+function scottyline {
+    echo $(timestamp) $@
 }
 
 function scottyinfo {
-    echo $(upperme): $@ 
+    if [ $_ERROR_ENCOUNTERED -eq 0 ]; then
+        scottyline $@
+    else
+       scottyline $@ >&2
+    fi
 }
 
 function scottyerror {
-    echo $(upperme): $@ >&2 
+    scottyline $@ >&2
+    if [ $_ERROR_ENCOUNTERED -eq 0 ]; then
+       _ERROR_ENCOUNTERED=1
+       scottyline "Going into verbose mode after error encounter." >&2
+    fi
 }
 
 function ssh255 {
@@ -43,20 +58,19 @@ function isIncomplete {
 }
 
 function isNthDay {
-    if [ $(( ( $(date +%s) / (60*60*24) ) % $BACKUP_RUNEVERYNTHDAY )) -eq 0 ]; 
+    if [ $(( ( $(date +%s) / (60*60*24) ) % $BACKUP_RUNEVERYNTHDAY )) -eq 0 ];
     then
        return 0
     else
        return 1
-    fi 
+    fi
 }
 
 function latestTooOld {
     for oldbackup in $(grepbackups); do
        tstamp=$(echo $oldbackup | cut -d'-' -f1)
-       
-       if [ $(( $(date +%s) - $tstamp )) -lt \
-           $(( ($BACKUP_RUNEVERYNTHDAY*24+12)*60*60 )) ]
+
+       if [ $(( $(date +%s) - $tstamp )) -lt $(( ($BACKUP_RUNEVERYNTHDAY*24+12)*60*60 )) ]
        then
            return 1
        fi
@@ -100,16 +114,19 @@ function scottysync {
     fi
 
     scottyinfo "Starting rsync."
-    rsync -e ssh \
-       -v -aHAX --numeric-ids --delete --delete-excluded \
-       --link-dest=$dir_current \
-       $rsync_exclude \
-       $SYNC_SRC/ $REMOTE_HOST:$dir_incomplete/
-    
+    rsync -e ssh --bwlimit=$BWLIMIT \
+          -v -aHAX --numeric-ids --delete --delete-excluded \
+          --link-dest=$dir_current \
+          $rsync_exclude \
+          $SYNC_SRC/ $REMOTE_HOST:$dir_incomplete/
+
     if [ $? -eq 0 ]; then
        scottyinfo "Timestamping completed backup and linking to current backup."
        ssh255 $REMOTE_HOST \
-           "mv $dir_incomplete $dir_timestamped && rm -f $dir_current && ln -s $(basename $dir_timestamped) $dir_current"
+              "mv $dir_incomplete $dir_timestamped && rm -f $dir_current && \
+               ln -s $(basename $dir_timestamped) $dir_current"
+    else
+       scottyerror "Rsync failed."
     fi
 
     while [ $(grepbackups | wc -l) -gt $ARCHIVE_KEEPNBACKUPS ]; do
@@ -125,8 +142,10 @@ function scottysync {
     done
 }
 
-function prepare {
-    scottyinfo "Preparing for sync."
+function deleteLock {
+    if ! rmdir /var/lock/$(basename $0); then
+       scottyerror "Could not delete lockfile /tmp/$(basename $0).lock!"
+    fi
 }
 
 function cleanup_abort {
@@ -139,6 +158,8 @@ function cleanup_abort {
        kill $(jobs -p)
     fi
 
+    deleteLock
+
     exit
 }
 
@@ -150,6 +171,11 @@ function prepare {
     scottyinfo "No prepare function was defined."
 }
 
+function cleanup_normal {
+    cleanup
+    deleteLock
+}
+
 function printhelp {
     cat <<EOF
 Usage: $(basename $0) [OPTION]...
@@ -176,7 +202,7 @@ function backmeupscotty {
                 ;;
        esac
     done
-    
+
     ssh255 $REMOTE_HOST exit
 
     if latestTooOld; then
@@ -195,14 +221,14 @@ function backmeupscotty {
     prepare
     scottysync
 
-    trap cleanup EXIT
+    trap cleanup_normal EXIT
 
     exit 0
 }
 
-exec 200>/var/run/$(basename $0).pid
-if ! flock -n 200; then
+if ! mkdir /var/lock/$(basename $0); then
     scottyerror "Another instance of $(basename $0) is still running!"
     exit 1
+else
+    trap deleteLock EXIT
 fi
-echo $$ 1>&200