keepalived: notifyFile_3.sh

#!/bin/sh

file_removed() {
    xmessage "$2 was removed from $1" &
}

file_modified() {
    TIMESTAMP=`date`
    echo "[$TIMESTAMP]: The file $1$2 was modified" >> /tmp/monitor_log
    # root run command unison with env in /home/ubuntu/.unison/default.prf as an ubuntu user 
    su -c "/usr/bin/unison" ubuntu 
}

file_created() {
    TIMESTAMP=`date`
    echo "[$TIMESTAMP]: The file $1$2 was created" >> /tmp/monitor_log
}

inotifywait -q -m -r -e modify,delete,create $1 | while read DIRECTORY EVENT FILE; do
    case $EVENT in
        MODIFY*)
            file_modified "$DIRECTORY" "$FILE"
            ;;
        CREATE*)
            file_created "$DIRECTORY" "$FILE"
            ;;
        DELETE*)
            file_removed "$DIRECTORY" "$FILE"
            ;;
    esac
done