#!/bin/sh

unset KILL SPAWN

MODE="t"

printhelp () {
  printf "t: toggle/restart/kill a process\n"
  printf "t [-tr] [--] process [proc_args]\n"
  printf "\t-t) toggle (kill if running, start if not)\n"
  printf "\t-r) restart (kill and start again whether running or not)\n"
  exit 1;
}

while getopts "tr-" o; do case "${o}" in
  t) MODE="t" ;;
  r) MODE="r" ;;
  -) break ;;
  *) printhelp ;;
esac done

SPAWN="$(echo "$@" | sed 's/^.*-[-tr] //')"
KILL="$(echo "$SPAWN" | cut -d' ' -f1)"

[ -z "${MODE}" ] || [ -z "$SPAWN" ] && exit
case "${MODE}" in
  t)
    if pgrep -x "$KILL"; then
      killall "$KILL" >/dev/null 2>&1
    else
      $SPAWN &
    fi
    ;;
  r)
    killall "$KILL" >/dev/null 2>&1
    sleep 0.1
    $SPAWN &
    ;;
esac