From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from conuserg-07.nifty.com (conuserg-07.nifty.com [210.131.2.74]) by sourceware.org (Postfix) with ESMTPS id 455E63858408 for ; Thu, 11 Nov 2021 08:20:08 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 455E63858408 Authentication-Results: sourceware.org; dmarc=fail (p=none dis=none) header.from=nifty.ne.jp Authentication-Results: sourceware.org; spf=fail smtp.mailfrom=nifty.ne.jp Received: from localhost.localdomain (z221123.dynamic.ppp.asahi-net.or.jp [110.4.221.123]) (authenticated) by conuserg-07.nifty.com with ESMTP id 1AB8JXpR016010; Thu, 11 Nov 2021 17:19:39 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-07.nifty.com 1AB8JXpR016010 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.ne.jp; s=dec2015msa; t=1636618779; bh=kuzYgOmo7YKlHDE5qdFNiSU8No0/+UzelAEa2kHgr7s=; h=From:To:Cc:Subject:Date:From; b=q2mc+ANegg6neRHv+dUvb7IklEFy4hMRLQR6woiVpzY+R0s2+8whhZY0NxcpOXvCX z5xyhL3rxiRUaGAHLOt6rjlTA3TgsfFxd9utR5HFenR3k751b+o/n4FdR+5S0AqFTz lReUXF+/T06a2cK4iGvB+Y8JFs6sNFjy+TnTsv7T7IXXRKNY3IX56hkrKMnPsQ/rfq +ejj1FBpbJ4qBWgeP32xKpduSp+U9gUYtK1E8246OPR03m8OmKSEt5Ci78VKPrjRZs ivkRkvOo4rQNLXupTmC+aWyw5eFMqiB4Svcbw9eX0H8ryPncQuyLsbjZe4YaqWvWDp ap14tPzBYTwKQ== X-Nifty-SrcIP: [110.4.221.123] From: Takashi Yano To: cygwin-patches@cygwin.com Subject: [PATCH] Cygwin: pipe: Fix raw_write() for non-cygwin pipe with size zero. Date: Thu, 11 Nov 2021 17:19:23 +0900 Message-Id: <20211111081923.802-1-takashi.yano@nifty.ne.jp> X-Mailer: git-send-email 2.33.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-10.3 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: cygwin-patches@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Cygwin core component patch submission and discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Nov 2021 08:20:09 -0000 - Currently, raw_write() fails to handle size zero pipe which may be created by non-cygwin apps (e.g. Windows native ninja). This patch fixes the issue. Addresses: https://cygwin.com/pipermail/cygwin/2021-November/249844.html --- winsup/cygwin/fhandler_pipe.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/winsup/cygwin/fhandler_pipe.cc b/winsup/cygwin/fhandler_pipe.cc index 13731437e..9392a28c1 100644 --- a/winsup/cygwin/fhandler_pipe.cc +++ b/winsup/cygwin/fhandler_pipe.cc @@ -449,7 +449,7 @@ fhandler_pipe_fifo::raw_write (const void *ptr, size_t len) return -1; } - if (len <= pipe_buf_size) + if (len <= pipe_buf_size || pipe_buf_size == 0) chunk = len; else if (is_nonblocking ()) chunk = len = pipe_buf_size; -- 2.33.0