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From: catone@dsl.cis.upenn.edu (Tony Catone)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Cannot putenv() in MSC 4.0
Message-ID: <1243@super.upenn.edu.upenn.edu>
Date: Thu, 28-May-87 13:59:41 EDT
Article-I.D.: super.1243
Posted: Thu May 28 13:59:41 1987
Date-Received: Sat, 30-May-87 07:49:00 EDT
References: <2301@tekgvs.TEK.COM> <1092@rocksvax.UUCP>
Sender: root@super.upenn.edu.upenn.edu
Reply-To: catone@dsl.cis.upenn.edu.UUCP (Tony Catone)
Distribution: na
Organization: University of Pennsylvania
Lines: 16
Keywords: pushd,popd,putenv,Turbo Pascal,Microsoft C V4.0

In article <1092@rocksvax.UUCP> martyl@rocksvax.UUCP (Marty Leisner) writes:
>So the child program would have to take extraordinary actions to set the
>parents environment (I think there's something about interrupt 2e which 
>allows programs to send commands to command.com -- if this is so, doing a
>SET var=name would set the parent environment (???)).

There was much discussion about achieving just this effect within the
last month, in either PC-Mag or Info-PC Digest, or possibly both.
The master environment can be modified, once it is located through
the use of undocumented DOS function calls.  I'm leaving for 2 weeks
vacation (yea!) tomorrow, but if enough people email me, I'll dig
the information up and post it upon my return.

					- Tony
					  catone@dsl.cis.upenn.edu
					  catone@wharton.upenn.edu