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Date:	Fri, 10 Sep 2004 14:48:24 -0400 (EDT)
From:	Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To:	cygwin AT cygwin DOT com
To:	Chuck McDevitt <cmcdevitt AT ABINITIO DOT COM>
cc:	"David A. Rogers" <darogers AT speakeasy DOT net>, cygwin AT cygwin DOT com,
	Dave Korn <dk AT artimi DOT com>
Subject:	RE: cygwin 1.5.11: execv doesn't set argv[0] on Windows programs
In-Reply-To:	<OF11317D53.7B086299-ON85256F0B.006544CE-85256F0B.0065AD2C@abinitio.com>
Message-ID:	<Pine.GSO.4.61.0409101444530.14874@slinky.cs.nyu.edu>
References:	<OF11317D53 DOT 7B086299-ON85256F0B DOT 006544CE-85256F0B DOT 0065AD2C AT abinitio DOT com>
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On Fri, 10 Sep 2004, Chuck McDevitt wrote:

> argv and argc are concepts from the C runtime, not the Windows OS.
>
> The actual entry point to your program is to a routine that calls the
> initialization routines of the C library, then calls winMain.
>
> Those initialization routines get the command line via Win32 call,
> allocates memory for argv, and parses the command line.
>
> Windows itself has no requirement that an application support argv and
> argc, and in fact programs in other languages (VB etc) don't have any such
> concept.

Ok, so I didn't use quite the right phrasing, but I believe it's been
explained adequately since.

> Cygwin, when launching an application, just needs to make sure the
> CreateProcess call has the command line passed to it.
> Everything else is handled by the the receiving program (via C runtime, if
> a C program).

Exactly, with one small clarification: "Cygwin, when launching an
application, just needs to make sure the CreateProcess call has the
*right* command line passed to it.".  Currently, spawn_guts() munges the
first token in that command line to match the image name, even if
instructed otherwise (via the args array).
	Igor
-- 
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     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

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