rsync-now.sh

#!/bin/bash
# rsync-now.sh

#echo "($$) Process started"

METHOD=ssh
ARGS="--delete --progress"
SRC=/dossier/source/
DEST=utilisateur@hote:/dossier/cible
OUTPUT_MAIL=root@localhost
#OUTPUT_MAIL=0

SCRIPTNAME=$(basename "$0")
LOCK=$SCRIPTNAME.lock
RSYNC_CMD="rsync -e $METHOD -av $ARGS $SRC $DEST"

pid=$$
if [ -f $LOCK ]; then
    #echo "($$) Lock already exists, updating PID & exiting"
    echo $pid > $LOCK
    exit
fi;

#echo "($$) Lock does not exist, creating"
echo $pid > $LOCK

runCmd=0
while (( ! $runCmd )); do
    #echo "($$) Waiting 2s more..."
    sleep 2
    lockPid=`cat $LOCK`
    #echo "($$) $lockPid // $pid"
    if [ $lockPid == $pid ]; then
        runCmd=1
    else
        pid=$lockPid
    fi
done

#echo "($$) Lock PID unchanged, executing commands"

out="`date` Starting sync...\n"
while (( $runCmd )); do
    out="$out`$RSYNC_CMD` \n"

    lockPid=`cat $LOCK`
    #echo "($$) $lockPid // $pid"
    if [ $lockPid == $pid ]; then
        runCmd=0
        rm $LOCK;
    else
        pid=$lockPid
    fi
done
out="$out`date` Done.\n"

if [ $OUTPUT_MAIL != 0 ]; then
    echo -e "$out" | mail -s "$SCRIPTNAME" $OUTPUT_MAIL
else
    echo -e "$out"
fi;