getmail with lockfile

getmail-wrapped

#!/usr/bin/env bash

me=`basename $0`
lockfile="/tmp/$me.lock"

lock () {
    if [ "$1" = "lock" ]
    then
	if [ -e "$lockfile" ]
	then
	    >&2 echo "$lockfile already exists"
	    exit 1
	fi
	touch "$lockfile"
    fi
    if [ "$1" = "unlock" ]
    then
	rm "$lockfile"
    fi
}

handler () {
    kill -s SIGTERM $PID
}

lock "lock"

getmail $@ &
PID=$!

trap handler SIGINT

while $(kill -0 $PID 2>/dev/null)
do
    sleep 1
done

lock "unlock"