scripts/cron-heartbeat at master · camuso/scripts · GitHub

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#!/bin/bash
#
# cron-heartbeat
#

[ -n "$MYDIR" ] || {
	declare MYDIR=
	MYDIR="$(dirname "$(readlink -f "$0")")"
}

declare usagestr="$(
cat <<EOF

$(basename "$0")
\0
EOF
)"

#** usage: print info and instructions to screen
#
# Global
# 	usagestr
#*
usage() {
	echo -e "$usagestr"
}

#** control_c: control-c trap
#
# Global
#   CTLC_EXIT - bash environment variable
#*
control_c() {
	echo -e "\nCtrl-c detected\nCleaning up and exiting."
	exit $CTLC_EXIT
}

#** exitme
#
# Arguments
#   $1 - exit code
#   $2 - optional message
#*
exitme() {
	local -i code="$1"
	local msg="$2"

	((code == 0)) && exit "$code"
	echo -e "$msg"
	usage
	exit "$code"
}

#** main
#*
main() {
        # Trap for control-c
        trap control_c SIGINT

	LOG="/work/cron-heartbeat.log"
	TIMESTAMP="$(date '+%Y-%m-%d %H:%M:%S')"
	echo "Cron heartbeat at $TIMESTAMP" >> "$LOG"

	exitme 0
}

main "$@"