#!/bin/sh
umask 077
touch $2
if lockfile -r0 -l3600 $2.lock 2> /dev/null
then
  trap "rm -f $2.lock" 1 2 3 15
  if lockfile -r0 -l3600 $1.lock 2> /dev/null
    then
    trap "rm -f $1.lock" 1 2 3 15
    cat $1 >> $2 && rm -f $1
    rm -f $1.lock
  fi
  rm -f $2.lock
fi
exit 0