Path: utzoo!utgpu!jarvis.csri.toronto.edu!helios.physics.utoronto.ca!ists!yunexus!geac!maccs!cs4g6ag
From: cs4g6ag@maccs.dcss.mcmaster.ca (Stephen M. Dunn)
Newsgroups: comp.sys.ibm.pc.programmer
Subject: Re: Sticky Problems with C on IBM-compatibles
Keywords: text, printer, display, directory, screen
Message-ID: <25E99340.10868@maccs.dcss.mcmaster.ca>
Date: 26 Feb 90 20:36:16 GMT
References: <492@bilver.UUCP> <4467@pegasus.ATT.COM>
Reply-To: cs4g6ag@maccs.dcss.mcmaster.ca (Stephen M. Dunn)
Organization: McMaster University, Hamilton, Ontario
Lines: 25

In article <4467@pegasus.ATT.COM> psrc@pegasus.ATT.COM (Paul S. R. Chisholm) writes:
$> 7) If my PATH environment variable is set up so that I can run one of my
$>    programs from a directory different than the one containing my program,
$>    how it possible for my program to determine the directory IT started
$>    from?  Or does that information have to be hard-coded in my program?
$DOS 3.0 and later generate enough information for the TC start-up code
$to put the path name in argv[0].  In version 1.x and 2.x, your best bet
$is to (yuchh) search the current directory, and then the path,
$yourself.

   Well, that really only applies to DOS 2 and above ... DOS 1 doesn't
have subdirectories, and I don't recall it having had an environment,
either, though I could be wrong.  Anyway, I don't think any current C
compilers have libraries that will work under DOS 1 anyway.

   BTW, in regard to the second edition of Duncan's book (_Advanced
MS-DOS_):  how significant are the differences between it and the
first edition?  I believe the second one covers DOS 3.3 (and 4?)
and EMS 4.0 ... any other major diffs?  Is it worth buying a copy of
the new edition?
-- 
Stephen M. Dunn                               cs4g6ag@maccs.dcss.mcmaster.ca
          <std_disclaimer.h> = "\nI'm only an undergraduate!!!\n";
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               I Think I'm Going Bald - Caress of Steel, Rush