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Date: Thu, 24 Jan 2002 16:38:40 +0100
From: Corinna Vinschen <cygwin AT cygwin DOT com>
To: cygwin <cygwin AT cygwin DOT com>
Subject: Re: Descriptor passing between process
Message-ID: <20020124163840.B11608@cygbert.vinschen.de>
Mail-Followup-To: cygwin <cygwin AT cygwin DOT com>
References: <002401c1a3f4$0b77e8c0$010310ac AT lyoncleitienne> <20020123120701 DOT A11608 AT cygbert DOT vinschen DOT de> <8181418335 DOT 20020124161420 AT logos-m DOT ru> <20020124142156 DOT Y11608 AT cygbert DOT vinschen DOT de> <4183271981 DOT 20020124164513 AT logos-m DOT ru>
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On Thu, Jan 24, 2002 at 04:45:13PM +0300, Egor Duda wrote:
> Hi!
> 
> Thursday, 24 January, 2002 Corinna Vinschen cygwin AT cygwin DOT com wrote:
> 
> CV> On Thu, Jan 24, 2002 at 04:14:20PM +0300, Egor Duda wrote:
> >> CV> It's part of the API since 1.3.8-1.
> >> 
> >> Hmm. What change are you referring to? I don't see anything like this
> >> in the ChangeLog.
> 
> CV> 2002-01-19  Mark Bradshaw  <bradshaw AT staff DOT crosswalk DOT com>
> 
> CV>         * cygwin.din: Add recvmsg and sendmsg.
> CV>         * net.cc: Add cygwin_recvmsg and cygwin_sendmsg.
> CV>         * /usr/include/sys/socket.h: Add recvmsg and sendmsg.
> 
> yes, but if i understand things correctly, Christophe was talking
> about passing file descriptors between processes by means of AF_UNIX
> sockets. btw, "Subject:" implies this :).
> 
> this is done on unices via msg_control (or msg_accrights) field in msg
> structure. and unices ensure that the process which receives the
> message using recvmsg can use the descriptor for all kinds of file
> operations. in the case of cygwin, the receiver may get the value 3 in
> message packet, but won't be able to use it in "read (3, buf, sizeof (buf))"

Ouch.  I didn't read your message correctly before sending the
reply to Christophe's mail.

Sorry,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin AT cygwin DOT com
Red Hat, Inc.

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