rsync-motdet-now.sh / ComEye

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

# Configuration
METHOD=
ARGS="--progress --chmod=g+w,o-rwx"
SRC=/home/motion/detections/
DEST=usul::motdet
OUTPUT_MAIL=0

# Constants
SCRIPTNAME=$(basename "$0")
CWDIR=$(dirname "$0")
LOG=$SCRIPTNAME.log
LOCK=$SCRIPTNAME.lock
PID_FILE=$SCRIPTNAME.tmp
RSYNC_CMD="rsync -av $ARGS $SRC $DEST"

## Process start ##
cd $CWDIR
echo "($$) Process started | CWD: $PWD | UID: $UID | ARGS: $@" >> $LOG

pid=$$

# Check lock
if ! mkdir $LOCK; then
    echo "($$) Lock already exists, updating PID & exiting" >> $LOG
    echo $pid > $PID_FILE
    exit 1
fi;

echo "($$) Lock does not exist, creating" >> $LOG
echo $pid > $PID_FILE
echo "($$) Lock PID: `cat $PID_FILE`" >> $LOG

# Loop / Wait for no more concurrent processes
runCmd=0
while [ $runCmd == 0 ]; do
    echo "($$) Waiting 2s more..." >> $LOG
    sleep 1
    lastPid=`cat $PID_FILE`
    echo "($$) $lastPid // $pid" >> $LOG
    if [ "$lastPid" == "$pid" ]; then
        runCmd=1
    else
        pid=$lastPid
    fi
done

echo "($$) Lock PID unchanged, executing commands" >> $LOG

# Loop until command is out of job
out="`date` Starting sync...\n"
while [ $runCmd == 1 ]; do
    out="$out`$RSYNC_CMD 2>&1` \n"

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

echo "($$) Finished, flushing output:" >> $LOG
echo -e "$out" >> $LOG

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

echo "($$) Process finished | CWD: $PWD | UID: $UID | ARGS: $@" >> $LOG