91 lines
2.2 KiB
Plaintext
91 lines
2.2 KiB
Plaintext
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#!/bin/bash
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SYSLOG_IDENTIFIER="cpu_wdt"
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CPUWDT_MAIN_TASK_RUNNING_FLAG=true
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TIMEOUT=180
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KEEPALIVE=60
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function log_info()
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{
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logger -p info -t ${SYSLOG_IDENTIFIER} "$@"
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}
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function usage()
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{
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echo "Usage: $0 ACTION [OPTIONS]..."
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echo ""
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echo "Actions:"
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echo " start Start CPU WDT"
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echo " stop Stop CPU WDT"
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echo ""
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echo "Options:"
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echo " -h Show this help"
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echo " -t <timeout> WDT timeout period: {30|60|180}, default 180"
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echo " -k <keepalive> WDT keep alive period, {1..(timeout-5)}, default 60"
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exit 1
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}
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function validate_action()
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{
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if [[ "${ACTION}" != "start" && "${ACTION}" != "stop" ]]; then
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echo -e "Invalid action: ${ACTION}\n"
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usage
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fi
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}
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function validate_options()
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{
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if [[ ${TIMEOUT} != "30" && ${TIMEOUT} != "60" && ${TIMEOUT} != "180" ]]; then
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echo -e "Invalid timeout value: ${TIMEOUT}\n"
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usage
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fi
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if [[ ${KEEPALIVE} -le 0 || ${KEEPALIVE} -gt $((TIMEOUT - 5)) ]]; then
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echo "Invalid keepalive value: ${KEEPALIVE}"
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echo ""
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usage
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fi
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}
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trap 'log_info "Caught SIGHUP - ignoring..."' SIGHUP
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trap 'log_info "Caught SIGINT - exiting..."; CPUWDT_MAIN_TASK_RUNNING_FLAG=false' SIGINT
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trap 'log_info "Caught SIGTERM - exiting..."; CPUWDT_MAIN_TASK_RUNNING_FLAG=false' SIGTERM
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ACTION=$1
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shift
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validate_action
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while getopts "t:k:" OPTION; do
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case $OPTION in
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t)
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TIMEOUT=${OPTARG}
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;;
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k)
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KEEPALIVE=${OPTARG}
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;;
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*)
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usage
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esac
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done
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validate_options
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if [[ "${ACTION}" == "start" ]]; then
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# enable
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log_info "Enable CPU WDT.."
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watchdogutil arm -s "${TIMEOUT}" > /dev/null
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log_info "CPU WDT has been enabled with $TIMEOUT seconds timeout"
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# keep alive
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log_info "Enable keep alive messaging every $KEEPALIVE seconds"
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while [[ ${CPUWDT_MAIN_TASK_RUNNING_FLAG} == "true" ]]; do
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watchdogutil arm -s "${TIMEOUT}" > /dev/null
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log_info "Keep alive message sent [RC=$?]. Will sleep ${KEEPALIVE} seconds."
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sleep "${KEEPALIVE}"
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done
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log_info "Keep alive messaging has been disabled"
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fi
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log_info "Disable CPU WDT.."
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watchdogutil disarm
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log_info "CPU WDT has been disabled!"
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