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From:	Chris Faylor <cgf AT cygnus DOT com>
Date:	Fri, 24 Sep 1999 07:42:57 -0400
To:	"J.A. Bezemer" <costar AT panic DOT et DOT tudelft DOT nl>
Cc:	cygwin AT sourceware DOT cygnus DOT com
Subject:	Re: B20.1 & Win95 fork/socket bug, or Why Rsync Doesn't Work
Message-ID:	<19990924074257.A740@cygnus.com>
Reply-To:	cygwin AT sourceware DOT cygnus DOT com
Mail-Followup-To:	"J.A. Bezemer" <costar AT panic DOT et DOT tudelft DOT nl>,
	cygwin AT sourceware DOT cygnus DOT com
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In-Reply-To:	<Pine.LNX.3.96.990924130420.5468H-100000@panic.et.tudelft.nl>; from J.A. Bezemer on Fri, Sep 24, 1999 at 01:26:04PM +0200

On Fri, Sep 24, 1999 at 01:26:04PM +0200, J.A. Bezemer wrote:
>I tried to compile/run rsync (sources from
>http://www.student.uni-koeln.de/cygwin/Distribution/Source/rsync/) under
>Win95/Cygwin B20.1. Compiles allright, but doesn't run. Under 98 it runs
>perfectly well, so I suspect this problem is somewhere in Win95. It would be
>very nice if cygwin could do a workaround.

Patches gratefully accepted.

-Chris Faylor
-Win32 Manager
-Cygnus Solutions

>The problem is this: in do_recv() in rsync's main.c there's this structure:
>
>	f_in is filedescriptor of a socket connected to the rsync server
>
>        fork
>           child does read(f_in)
>
>        parent does write(f_in)
>
>Parent's write() is okay, but childs read() doesn't receive anything, and the
>child process just waits forever.
>
>I don't know if this affects only sockets, or all filedescriptors.
>
>In the mean time, for my specific situation I could remove the fork
>completely, and simply run the child after the parent. This works
>perfectly.
>
>I don't have time to go into more detail, but just ask if you need to know
>more. In case you're interested, My hacked version of rsync is at
>http://panic.et.tudelft.nl/~costar/pseudo-image-kit ("Windows version").
>
>And BTW, set CYGWIN=binmode, otherwise rsync goes all wrong...
>
>Regards,
>  Anne Bezemer

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