🚀 go-pugleaf

In article <1243@infbs.UUCP> hafer@infbs.UUCP (Udo Hafermann) writes:
>How is the TOS variable 'the-env' at 0x4BE intended to be used?
>Is it possible to use this variable to build an environment which will
>be recognized by shells?

Yes and no. Yes, there is a way to make shells recognize an environment. No,
this system variable is useless in this context (and in any I can think of, 
for that matter).

If an application is started with the Pexec system call, a parameter called
"envp" is passed. It is the address of a series of environment strings (NULL-
terminated C strings, one after another), with an extra NULL character as an
end marker. If you write a shell yourself, I advise you to copy the environment
you get (as the third parameter to "main", if it's in C) into a private buffer
of reasonable size (1 K, for example). Then you can manipulate it any way you
want. The address of this buffer is passed as the "envp" parameter to all
applications started from the shell.

Further information and a sample shell that uses that technique are available
upon request.

I hope I have been helpful.
-- 
 \\   .    Martin P Ibert, Westendallee 100 d, 1000 Berlin 19, West Germany  //
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