Monitor processing running on system, with single argument as process

process_monitor.sh

#!/bin/bash
if [ $EUID != 0 ] 
then
    echo "Please run as root"
    exit
fi

if [ "$1" == "" ]
then
    echo "No process name provided"
    exit
fi

check_process() {
    echo "`date +%T` : begin checking.... $1"
    [ `pgrep -n $1` ] && return 1 || return 0
}

while [ 1 ]; do
    check_process "$1"
    [ $? -eq 0 ] && echo "$ts: not running, restarting..." && `$1 -i > /dev/null`
    sleep 200
done

usage, pass single parameter after shell, e.g sudo bash ./process_monitor.sh dropbox