omxwd

#!/bin/sh
if [ "$1" = -h ]; then
	cat <<EOF
omxd watchdog
Usage: omxwd [pid]
pid	Optional PID of an omxplayer process.
Kills all omxplayer.bin processes in pgrp, or just the child of pid.
EOF
	exit
fi

p=$1
t=`date +%s`

[ -z "$p" ] && echo $t omxwd: killing all >&2
[ "$p" ] && echo $t omxwd: killing "$p" >&2

read pid comm state ppid pgrp rest </proc/$$/stat

ps -A -o pgid,ppid,pid,args | grep "^ *$pgrp" \
| while read pgid ppid pid args; do
	case "$args" in
	/usr/bin/omxplayer.bin*)
		[ "$p" -a "$p" != $ppid ] && continue
		killed=1
		echo $t omxwd: kill omxplayer.bin $pid of omxplayer $ppid >&2
		kill -9 $pid
		;;
	esac
done

# Retry if PID was specified but not found
[ -z "$p" -o "$killed" ] && exit 0

sleep 0.1
ps -A -o pgid,ppid,pid,args | grep "^ *$pgrp" \
| while read pgid ppid pid args; do
	case "$args" in
	/usr/bin/omxplayer.bin*)
		[ "$p" != $ppid ] && continue
		killed=1
		echo $t omxwd: kill omxplayer.bin $pid of omxplayer $ppid >&2
		kill -9 $pid
		;;
	esac
done