#!/bin/sh

count=1500

pidfile=/var/run/mpd.pid

trap 'killall mpd5 >/dev/null 2>&1; exit 1' SIGINT SIGHUP

wait_up() {
  limit=$1
  c=`ifconfig | grep '^ng.*UP' | wc -l`
  prev=$c
  steady=0
  while  [ $c -lt $limit ] && [ $steady -lt 5 ] || [ $c -eq 0 ]
  do
    sleep 1
    c=`ifconfig | grep '^ng.*UP' | wc -l`
    echo established: $c
    if [ $prev = $c ]; then
      steady=$(($steady+1))
    else
      steady=0
    fi
    prev=$c
  done
}

clean() {
  local i
  ngctl ls | awk '/iface|vjc|tee|ppp / {print $2}' >/tmp/list
  while read i
  do
    ngctl shutdown $i: 2>/dev/null
  done < /tmp/list
}

wait_notex() {
  c=`ngctl list 2>/dev/null | grep -cE 'Name: ng[0-9]'`
  while [ $c -gt $1 ]
  do
    if ps -acx | grep -q mpd; then
      echo still not destroyed: $c
    else
      clean
    fi
    c=`ngctl list 2>/dev/null | grep -cE 'Name: ng[0-9]'`
    sleep 1
  done
}

stop_mpd() {
  pwait `cat $pidfile 2>/dev/null` 2>/dev/null &
  killall mpd5 >/dev/null 2>&1
  wait_notex 0
  killall -QUIT mpd5 2>/dev/null
  wait
  clean
}

echo cleaning...
stop_mpd
echo generating config...
./generate $count
i=1
while :
do
  echo starting $i: `date`
  was=$(date '+%s')
  mpd5 -b
  wait_up $count
  now=$(date '+%s')
  echo $(( $count/($now-$was) )) sess/sec\; stopping $i: `date`
  stop_mpd
  i=$(($i+1))
done