From:	"west.usenetserver.com" <glenm AT myself DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Updating the program caller's environment from the called program
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NNTP-Posting-Date:	Wed, 19 Jul 2000 07:39:21 EDT
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Date:	Wed, 19 Jul 2000 13:39:16 +0200
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

I have written a program that allows adds path(s) and or file(s) to the
environment.  The command line is like this


AddToEnv envName pathToAdd

so for example a call like 'AddToEnv PATH C:\DOS\' would add the C:\DOS\
directory to the PATH environment variable if it wasn't already there.

So the problem is currently I have not figured out how to update the
caller's environment.  So when the AddToEnv.exe changes the environment the
program ends and the previous environment is restored.  Is there a way (and
if so how? example code or source code that does just that would be great)
to update the caller's environment.  I would like to code a solution that
works under plain DOS, and Win32 DOS Boxes.

I currently get around this with a source code solution.  Having AddToEnv
output a batch file and wrapping the process in a bat like this

AddToEnv envName pathToAdd > %temp%\temp.bat
call temp.bat

where AddToEnv outputs a set xxxx=jkfhasdljkfh string to temp.bat.

any coding help is appreciated

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