From mboxrd@z Thu Jan  1 00:00:00 1970
From: Scott <drmemory@3rivers.net>
Subject: Re: DOS program recording it's parameters and environment?
Date: Fri, 17 Feb 2012 15:29:06 -0700
Message-ID: <20120217222906.GB846@drmemory.local>
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To: Samuel Bronson <naesten@gmail.com>
Cc: franta@hanzlici.cz, linux-msdos@vger.kernel.org, freedos-user@lists.sourceforge.net

On Thu, Feb 16, 2012 at 08:57:46PM -0500, Samuel Bronson wrote:
> On Thu, Feb 16, 2012 at 4:01 PM, Paul Crawford <psc@sat.dundee.ac.uk> wrote:
> > Dear Frantisek,
> >
> >> compiler v1.9 (http://www.openwatcom.org/) for DOS. And there I knock
> >> to problem - it seems as this compiler not support construction:
> >>
> >> int main(int argc, char *argv[], char *envp[])
> >
> > I think this 3rd argument may be a MS-specific extension, as most C programs
> > just have argc & argv in the call to main();
> 
> This is not actually MS-specific; I see it in my execve(2) manpage
> here on Linux, and

Got curious and pulled down my "Let's C" (Mark Williams Company)
manual from 1987.

 envp - Argument passed to main
        char *envp[];

 ... and is by convention the third argument passed to main.

 ... Note that Let's C calls main(argc, argv, NULL); however, envp is
 significant under some other operating systems, including TOS, UNIX
 and COHERENT.

If of any interest.

Scott Swanson