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Path: utzoo!watmath!watcgl!jchapman
From: jchapman@watcgl.UUCP (john chapman)
Newsgroups: net.micro.pc
Subject: Re: set environment
Message-ID: <1460@watcgl.UUCP>
Date: Wed, 13-Mar-85 09:37:27 EST
Article-I.D.: watcgl.1460
Posted: Wed Mar 13 09:37:27 1985
Date-Received: Thu, 14-Mar-85 03:02:36 EST
References: <1200005@ur-univax.UUCP>
Organization: U of Waterloo, Ontario
Lines: 23

> The DOS manual talks about adding things to the environment with the SET
> ENVIRONMENT command and goes on to say that things in the environment can be
> accessed from within an application.  Can anyone tell me how to do this or
> where it is documented ?
> 
> Mark J. Dumic
> ...!{allegra|decvax|seismo}rochester!ur-univax!marc
  
 This works the same way is in unix, e.g.
 set <name>=<string>
 (I can't recall off hand if the = is necessary or just a blank
  but you get the idea.  Accessing the environment is a different
  matter: when a program is executed part of the run time header
  (in first 100h bytes of programs code segment) is set to the
  address of the environment. The environment is stored as a 
  series of strings x=y.  So you would need some sort of routine
  to pick up the pointer and scn through the environment looking
  for the string of interest (I think they are all null terminated).
 
  Hope this is what you were looking for,
 
  John Chapman
  ...!watmath!watcgl!jchapman