From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 5428 invoked by alias); 16 Sep 2009 20:16:29 -0000 Received: (qmail 5420 invoked by uid 22791); 16 Sep 2009 20:16:29 -0000 X-SWARE-Spam-Status: No, hits=-2.0 required=5.0 tests=BAYES_00,SARE_MSGID_LONG40,SPF_PASS X-Spam-Check-By: sourceware.org Received: from mail-ew0-f218.google.com (HELO mail-ew0-f218.google.com) (209.85.219.218) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 16 Sep 2009 20:16:24 +0000 Received: by ewy18 with SMTP id 18so3030196ewy.43 for ; Wed, 16 Sep 2009 13:16:21 -0700 (PDT) MIME-Version: 1.0 Received: by 10.211.160.19 with SMTP id m19mr2816801ebo.2.1253132181343; Wed, 16 Sep 2009 13:16:21 -0700 (PDT) Date: Wed, 16 Sep 2009 20:16:00 -0000 Message-ID: Subject: Opening a socket connection in a fork ? From: Gu1ll4um3r0m41n To: cygwin@cygwin.com Content-Type: multipart/mixed; boundary=00504502d2d6868ede0473b7922d Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com X-SW-Source: 2009-09/txt/msg00383.txt.bz2 --00504502d2d6868ede0473b7922d Content-Type: text/plain; charset=ISO-8859-1 Content-length: 631 Hello, I'm trying to run a program on cygwin that forks, opens a socket connection and sends the status of the connection to the parent process using pipes. The parent process then sends data through the opened socket. The program works well on linux but on cygwin, i cannot use recv on a socket opened in a fork. The recv function always return -1, errno 22 ("EINVAL"). The weird thing is that the socket stays open and send still works... I attached a short example. I don't know if this is a bug or a limitation due to the fork() implementation in cygwin... I searched on google but couldn't find anything really useful. 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