file descriptors --> filenames

[jackm%ardc at sri-unix.UUCP]

From:      Jack Moskowitz (PAD) <jackm at ardc>

If you need to pass the filenames to other programs that you exec()
you can do this through the environment string. This allows the
power of the unix multi-processing while still using the filename
identifiers that yu may need. I realize that this is a little
more than your request, however it may be of some use to you.