run_script_with_lock-dbus_in_crontab.sh

#!/bin/bash

# usage
if [ "$#" -ne 1 ]; then
    echo "Usage:"
    echo "    run_script_with_lock-dbus_in_crontab.sh <command_or_script_name>"
    exit 1
fi

# aliases
USERNAME=`whoami`
SCRIPT=`basename $1`
LOCKFILE=/tmp/$SCRIPT.lock
LOGFILE=/tmp/$SCRIPT.log

# without this line the python3-notify2 inside the crontab is not worked
export DBUS_SESSION_BUS_ADDRESS=`ps -u $USERNAME e | grep -Eo 'dbus-daemon.*address=unix:abstract=/tmp/dbus-[A-Za-z0-9]{10}' | tail -c35`

# script is already running
if [ -e ${LOCKFILE} ] && kill -0 `cat ${LOCKFILE}`; then
    echo "$SCRIPT: already running"
    exit
fi

# make sure the lockfile is removed when we exit and then claim it
trap "rm -f ${LOCKFILE}; exit" INT TERM EXIT
echo $$ > ${LOCKFILE}

# execute the script
echo ">>>>>>>>>>>>> " `date` " <<<<<<<<<<<<<" >> $LOGFILE
$1 >> $LOGFILE 2>&1

# remove lock
rm -f ${LOCKFILE}