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Date:	Thu, 11 Aug 2005 10:36:45 -0400
From:	Christopher Faylor <cgf-no-personal-reply-please AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: "Segmentation fault" CygWin tools with code Injection-MS Detours
Message-ID:	<20050811143645.GF16476@trixie.casa.cgf.cx>
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References:	<42FB4856 DOT 9060808 AT club-internet DOT fr> <42FB4B92 DOT 4060101 AT le-resistant DOT com>
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On Thu, Aug 11, 2005 at 02:58:58PM +0200, Louis Lecaroz wrote:
>Having (if possible ;) ) a patch & a standard modification in cygwin to
>allow this type of programming will be really great !

Cygwin has its own (currently undocumented) hooking mechanism.  Setting
the LD_PRELOAD environment variable to the name of a DLL will cause any
function in the DLL to override the similarly named cygwin function.  It
works similarly to linux:

 LD_PRELOAD
  A whitespace-separated list of additional, user-specified, ELF shared
  libraries to be loaded before all others.  This can be used to
  selectively override functions in other shared libraries.

except that it uses DLLs rather than "ELF shared libraries".

cgf

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