#!/bin/sh -

# An example of the classic tmpdir hack
# to avoid race conditions.
# 
# Use this method if you are on a Unix-like
# system which does not have a mktemp utility



umask 077
DIRNAME=/tmp/foo.$$
if ! mkdir $DIRNAME ; then
            echo "temporary directory already exists, possible attack"
            exit 255
fi
 
TMPFILE=$DIRNAME/tmp.$$ 


date > $TMPFILE		# for example

( The actual script goes here. ) 

rm -rf $DIRNAME