From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 126252 invoked by alias); 22 Jan 2019 08:57:25 -0000 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 Received: (qmail 126245 invoked by uid 89); 22 Jan 2019 08:57:25 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-2.6 required=5.0 tests=BAYES_00,NORMAL_HTTP_TO_IP,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2 spammy=pipe, socket, emulate, c.s X-HELO: lb3-smtp-cloud7.xs4all.net Received: from lb3-smtp-cloud7.xs4all.net (HELO lb3-smtp-cloud7.xs4all.net) (194.109.24.31) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Tue, 22 Jan 2019 08:57:23 +0000 Received: from webmail.xs4all.nl ([IPv6:2001:888:0:22:194:109:20:199]) by smtp-cloud7.xs4all.net with ESMTPA id lrs0glIbbBDyIlrs0gT31u; Tue, 22 Jan 2019 09:57:20 +0100 Received: from a83-162-234-136.adsl.xs4all.nl ([83.162.234.136]) by webmail.xs4all.nl with HTTP (HTTP/1.1 POST); Tue, 22 Jan 2019 09:57:20 +0100 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="=_e8233a59e192b3622c9d8208f8731238" Date: Tue, 22 Jan 2019 08:57:00 -0000 From: Houder To: cygwin@cygwin.com Subject: Re: /dev/fd/N not synonymous with file descriptor N; it is on Linux In-Reply-To: References: <0f030e809f063f5a5e64ff7a7a0c3227@xs4all.nl> <20190106201950.GC4430@calimero.vinschen.de> Message-ID: <1c60402837d6510667357257b5e96e88@xs4all.nl> X-Sender: houder@xs4all.nl User-Agent: XS4ALL Webmail X-IsSubscribed: yes X-SW-Source: 2019-01/txt/msg00165.txt.bz2 --=_e8233a59e192b3622c9d8208f8731238 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; format=flowed Content-length: 1212 On 2019-01-22 09:50, Houder wrote: > On Sun, 6 Jan 2019 21:19:50, Corinna Vinschen wrote: >> >> On Dec 16 17:31, Houder wrote: >> > L.S., >> > >> > /dev/fd/N not synonymous with file descriptor N; it is on Linux >> > >> > 64-@@ cat /dev/fd/0 <<\EOF >> > > Hi >> > > EOF >> > cat: /dev/fd/0: No such file or directory >> > >> > fails on Cygwin; not on Linux. >> > >> > Also see: >> > >> > https://cygwin.com/ml/cygwin/2018-12/msg00028.html >> > ( Bash heredoc on FD 3 ) >> > >> > Based on the output of strace on Linux, I composed an STC, that duplicates >> > the steps taken by bash (and cat). >> >> This should work in the latest developer snapshot uploaded to >> https://cygwin.com/snapshots/ Please give it a try. >> >> Thanks, >> Corinna > > Nice! > > This solves: -i /dev/fd/N N< problem) > > Howver ... > (and I sure that I am not telling you anything new) > > it still not the same as Linux ... > > So, for the record only: and as another example, this STC succeeds on Linux ..., but fails on Cygwin. 64-@@ ./stca /dev/fd/0 < bla > EOF fd1 = 0 argv[1] = /dev/fd/0 fd2 = 3 id = writefd2, errno = 13, errstr = Permission denied 64-@@ ===== 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