'getenv' C function

[Pedro Zorzenon Neto]

Hi friends,

  I'm fixing a "wishlist" bug in package jgraph and I'm using "getenv" C
function to get a user option (user can choose postscript encoding).

  The upstream author uses this software for some Unix and also for DOS.
  The author intends to incorporate my patch in the upstream, I'd like to
know if "getenv" will work in DOS.

  Thanks,
    Pedro