[cs631apue] Test collisions

[kthompso]

631,

Everyone using this same test script is trying to create files
/tmp/big /tmp/f and some other thing in the tmp directory.

If you're getting these permissions errors, make your own directory
in /tmp and then set TMPDIR to that directory before running your test.

$ mkdir /tmp/${USER}
$ env TMPDIR=/tmp/${USER} ./testcp.sh -v -p a.out

-Be sure to create your directory under /tmp if you want to finish
anytime this year.

Regards,
Kyle