S13watchdog

#!/bin/bash

SYS_CONF="/etc/watchdog.conf"
BOOT_CONF="/boot/watchdog.conf"
USER_CONF="/data/etc/watchdog.conf"

PROG="/sbin/watchdog"
DEVICE="/dev/watchdog"
TIMEOUT=5

THERMAL_ZONE=
MAX_TEMP=
TEMP_INTERVAL=10

SYS_CHECK="/usr/libexec/watchdog-check"
USER_CHECK="/data/etc/watchdog-check"
CHECK_LOG="/var/log/watchdog-check.log"
CHECK_INTERVAL=10

test -s ${SYS_CONF} && source ${SYS_CONF}
test -s ${USER_CONF} && source ${USER_CONF}
test -s ${BOOT_CONF} && source ${BOOT_CONF}

test -n "${OS_VERSION}" || source /etc/init.d/base


function start_watchdog() {
    if ! [[ -x ${PROG} && -e ${DEVICE} ]]; then
        return
    fi
    msg_begin "Starting watchdog"
    ${PROG} -t ${TIMEOUT} ${DEVICE}
    test $? == 0 && msg_done || msg_fail
}

function start_watch_temp() {
    if [[ -z "${THERMAL_ZONE}" ]] || [[ -z "${MAX_TEMP}" ]]; then
        return
    fi
    while true; do
        sleep ${TEMP_INTERVAL}
        temp=$(cat /sys/class/thermal/${THERMAL_ZONE}/temp)
        temp=$((temp / 1000))
        if [[ "${temp}" -gt ${MAX_TEMP} ]]; then
            panic action watchdog "temperature too high: ${temp} > ${MAX_TEMP}"
        fi
    done
}

function start_watch_check() {
    if ! [[ -x "${SYS_CHECK}" ]] && ! [[ -x "${USER_CHECK}" ]]; then
        return
    fi
    while true; do
        sleep ${CHECK_INTERVAL}
        if [[ -x "${SYS_CHECK}" ]] && ! "${SYS_CHECK}" &>>${CHECK_LOG}; then
            panic action watchdog "system check failed"
        elif [[ -x "${USER_CHECK}" ]] && ! "${USER_CHECK}" &>>${CHECK_LOG}; then
            panic action watchdog "user check failed"
        fi
    done
}

function stop() {
    msg_begin "Stopping watchdog"
    killall -q $(basename ${PROG})
    ps | grep "service watchdog" | grep -v $$ | grep -v grep | tr -s ' ' | sed -e 's/^\s//' | cut -d ' ' -f 1 | xargs -r kill
    ps | grep "S13watchdog" | grep -v $$ | grep -v grep | tr -s ' ' | sed -e 's/^\s//' | cut -d ' ' -f 1 | xargs -r kill
    msg_done
}


case "$1" in
    start)
        start_watchdog
        start_watch_temp &
        start_watch_check &
        ;;

    stop)
        true
        ;;

    reallystop)
        stop
        ;;

    *)
        echo $"Usage: $0 {start|reallystop}"
        exit 1
esac

exit $?