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Date: Wed, 19 Jun 2013 10:53:34 +0400
Message-ID: <CABEPuQKtytz=Yjw=-S4LOKm8VGCOfa3hSgdpnhkxaWye1GoVaQ@mail.gmail.com>
Subject: Re: Adding MSYS functionality to Cygwin
From: =?KOI8-R?B?4czFy9PFyiDwwdfMz9c=?= <alexpux AT gmail DOT com>
To: cygwin AT cygwin DOT com
Content-Type: text/plain; charset=ISO-8859-1

2013/6/19 Christopher Faylor wrote:
> On Tue, Jun 18, 2013 at 04:04:06PM -0600, Warren Young wrote:
>>On 6/18/2013 13:30, ??????? ?????? wrote:
>>> 2013/6/18 Warren Young :
>>>> On 6/18/2013 12:40, ??????? ?????? wrote:
>>>>>
>>>>> 1. The correct definition of executables belonging to Cygwin DLL.
>>>>
>>>> Can you give an example of what you mean here?
>>>>
>>> All cygwin applications depends on cygwin1.dll. We need to translate
>>> arguments only for non-cygwin applications.
>>
>>It would be possible, though somewhat evil, for Cygwin's exec()
>>implementation to peek at the DLL dependency list of a program before
>>starting it, and from that infer whether it should automatically
>>translate paths.
>
> Cygwin already does this.  It detects whether the program it is about
> to run uses the Cygwin DLL and, if not, makes decisions on how to
> handle exec.  It would be relatively easy to extend this.
>

Thanks for the point Christopher.
Today I investigate in this direction and find that logic works well
except one line in spawn.cc that I think can be fixed without break
anything.

Index: cygwin/spawn.cc
===================================================================
RCS file: /cvs/src/src/winsup/cygwin/spawn.cc,v
retrieving revision 1.345
diff -u -p -r1.345 spawn.cc
--- cygwin/spawn.cc 3 May 2013 19:39:01 -0000 1.345
+++ cygwin/spawn.cc 19 Jun 2013 05:53:36 -0000
@@ -406,7 +406,7 @@ child_info_spawn::worker (const char *pr
}
else
{
- if (wascygexec)
+ if (real_path.iscygexec ())
newargv.dup_all ();
else if (!one_line.fromargv (newargv, real_path.get_win32 (),
real_path.iscygexec ()))


Regards,
Alexey.

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