Child care

childcare.sh

#!/bin/bash

CHILD_PIDFILE=$PWD/child.pid

# Clean up old child, if any
if [ -f $CHILD_PIDFILE ]; then
    OLD_CHILD_PID=$(cat $CHILD_PIDFILE)
    ps $OLD_CHILD_PID >/dev/null
    if [ $? -eq 0 ]; then
        kill -9 $OLD_CHILD_PID
    fi
    rm $CHILD_PIDFILE
fi
    
# Spawn child
nc -l -p 2000 &
CHILD_PID=$!
echo $CHILD_PID > $CHILD_PIDFILE

# Sleep to give us some time to poke around
sleep 30