From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 7868) id 85ABC3858412; Thu, 11 Nov 2021 09:19:17 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 85ABC3858412 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Takashi Yano To: cygwin-cvs@sourceware.org Subject: [newlib-cygwin/cygwin-3_3-branch] Cygwin: pipe: Fix raw_write() for non-cygwin pipe with size zero. X-Act-Checkin: newlib-cygwin X-Git-Author: Takashi Yano X-Git-Refname: refs/heads/cygwin-3_3-branch X-Git-Oldrev: 08253fae73d03787dc868994321276861f413206 X-Git-Newrev: 7c902b3c90823f2990d320046a5dc806a0e247bd Message-Id: <20211111091917.85ABC3858412@sourceware.org> Date: Thu, 11 Nov 2021 09:19:17 +0000 (GMT) X-BeenThere: cygwin-cvs@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Cygwin core component git logs List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Nov 2021 09:19:17 -0000 https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=7c902b3c90823f2990d320046a5dc806a0e247bd commit 7c902b3c90823f2990d320046a5dc806a0e247bd Author: Takashi Yano Date: Thu Nov 11 12:30:24 2021 +0900 Cygwin: pipe: Fix raw_write() for non-cygwin pipe with size zero. - 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 Diff: --- 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 ccb106ea7..1ebf4de10 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;