#!/bin/bash

function check {
     if ! [ -f /run/user/1000/laba.pid ]; then
        return 1
     fi

     PID=`cat /run/user/1000/laba.pid`
     if [ -d /proc/$PID ]; then
        mes=`cat /proc/$PID/comm`
        if [[ $mes="sleep" ]] ;then
            return 0
        fi
     fi

     return 1
}

function start() {
    if check; then
        echo "The process already running."
        return
    fi

    (sleep 3600) & disown
    echo $! > /run/user/1000/laba.pid
    echo $!

}

function stop() {
    if check; then
        PID=`cat /run/user/1000/laba.pid`
        if ! kill -9 $PID 2>/dev/null; then
        echo "Unable to kill the process."
        fi
        rm -f /run/user/1000/laba.pid
    fi
}

function lab {
if [[ "$1" = "start" ]]; then start
elif [[ "$1" = "stop" ]]; then stop
elif [[ "$1" = "restart" ]]; then stop
start
else
    echo "How to use:
        stop - stop the program
        start - start the program
        restart - restart the program"
fi
}
lab "$1"