Debug script to log all cron output to a logfile

cron-debugger.sh

#!/bin/bash
# This script is a debug utility for cronjobs as explained in:
# - https://support.hypernode.com/knowledgebase/configure-cronjobs-on-hypernode/
# It logs all output and timing to a log file
#
# To use it, download the script, add the executable bit and put it in your cronjob:
# */5 * * * * /data/web/bin/debug-cron php -f /data/web/public/cron.php

LOGDIR="/data/web/public/var/log/crons"
TIMESTAMP="$( date '+%Y%m%d%H%M' )"
FILENAME="$LOGDIR/cronjob-${TIMESTAMP}.log"

function log() {
    while read LOG ; do
        echo "$(date) - $LOG" | tee -a $FILENAME
    done < "${1:-/dev/stdin}"
}

## Test if log dir is present
[ -d "${LOGDIR}" ] || mkdir -p "${LOGDIR}"

## Get arguments from script
SCRIPTNAME="$0"
COMMAND="${@}"

## Exit if no arguments
if [ "${COMMAND}x" == "x" ] ; then
    echo "$0 Usage $SCRIPTNAME <command>"
    exit 1
fi

## Log and run
echo "Running cron job \'${COMMAND}\'" | log
${COMMAND} | log
EXITCODE="$?"
echo "Cron job \'${COMMAND}\' finished with exit code ${EXITCODE}" | log