Re: MinGW port usable

From: H. Peter Anvin <hpa@zytor.com>
Date: Feb 1, 2007, 06:35 UTC
Message-ID: <45C18A3B.2070004@zytor.com>
In-Reply-To: <200701292320.43888.johannes.sixt@telecom.at>

Johannes Sixt wrote:

Show 13 quoted lines

> 
> The README.MinGW at 
> http://repo.or.cz/w/git/mingw.git?a=blob_plain;f=README.MinGW;hb=master gives 
> an overview on the state. The transfer via native git protocol does not work 
> and cannot be made working without major surgery(*). Theoretically, using 
> netcat (nc) as GIT_PROXY_COMMAND should work, but not in my setup for some 
> reason that I still do not know.
> 
> (*) The reason is that on Windows read() and write() cannot operate on 
> descriptors created by socket(). A work-around is to implement a (threaded) 
> proxy, but that's almost the same as if netcat were used as 
> GIT_PROXY_COMMAND.
>

Actually, I believe it can for the NT series kernels (at least 2000 or later, not sure about the earlier ones), but not for the DOS-based ones.

The trick is to use _open_osfhandle() to convert the file handle (a WinAPI construct) to a file descriptor (which in Windows is a construct of the C library.)

In 9x/ME, a socket isn't represented by a file handle, so _open_osfhandle() doesn't work on a socket object.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore98/html/_crt__open_osfhandle.asp

	-hpa