#!/bin/bash
#
# Process watchdog timer daemon: monitor the processes to ensure the applications are running
#

CONF_FILE="/etc/proc-wdtd.conf"

# check if the configure file exists
if [[ -f ${CONF_FILE} ]]; then
	echo "proc-wdtd: load configure file '${CONF_FILE}'"
else
	echo "proc-wdtd: ERROR: can not find file '${CONF_FILE}'"
	exit 1
fi

# load configuration
CONF=$(cat ${CONF_FILE} 2>/dev/null | sed 's/#.*//' | \
		sed 's/^[[:blank:]]*//' | sed 's/[[:blank:]]*$//' | sed '/^$/d' | \
		sed 's/[[:blank:]]*=[[:blank:]]*/=/')

# get application name list
APPS=$(echo "${CONF}" | awk -F'=' '{print$1}')

sleep 60
while true; do
	for app in ${APPS}; do
		# check native program
		pid=$(pidof ${app})
		if [[ "${pid}" != "" ]]; then
			echo "proc-wdtd: '${app}' is running (${pid})"
			continue
		fi
		# check python script
		pid=$(ps aux | grep python | grep -v grep | grep ${app} | awk '{print$1}')
		if [[ "${pid}" != "" ]]; then
			echo "proc-wdtd: '${app}' python script is running (${pid})"
			continue
		fi
		# the program is not running, execute the command to lunch it
		echo "proc-wdtd: '${app}' is not running"
		cmd=$(echo "${CONF}" | grep "^${app}=" | head -n 1 | \
				cut -d "=" -s -f2- | sed 's/^"//' | sed 's/"$//')
		echo "proc-wdtd: execute command '${cmd}'"
		${cmd} &>/dev/null &
	done
	sleep 60
done