#!/bin/sh

PIDFILE="/var/run/packet_capture.pid"

pid=$(cat "$PIDFILE" 2>/dev/null)
case "$pid" in ''|*[!0-9]*) pid="" ;; esac
if [ -n "$pid" ] && grep -sq packet_capture "/proc/$pid/cmdline"; then
    ppid=$(pgrep -P $pid)
    [ -n "$ppid" ] && kill -TERM $ppid
else
    # Nothing runs it any more (the helper died on an error before removing
    # it): a stale pidfile made every later start answer "running".
    rm -f "$PIDFILE"
fi

exit 0