#!/bin/sh
trap "kill 0" EXIT
i=0
max_i=500
while [ $i -lt $max_i ]; do
echo "$i: starting: $*"
$* &
LAST_PID=$!
wait $LAST_PID
echo "$i: stopped pid $LAST_PID with status $?"
i=$(expr $i + 1)
done
echo "exiting after $max_i runs"