From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 327 invoked by alias); 15 Dec 2014 11:43:19 -0000 Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm Precedence: bulk X-No-Archive: yes List-Id: Zsh Workers List List-Post: List-Help: X-Seq: 33972 Received: (qmail 14487 invoked from network); 15 Dec 2014 11:43:14 -0000 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on f.primenet.com.au X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.3.2 Date: Mon, 15 Dec 2014 12:33:14 +0100 From: Axel Beckert To: zsh-workers@zsh.org Subject: Different behaviour of zsh with two input redirections compared to all other POSIX shells I have installed Message-ID: <20141215113312.GJ26664@sym.noone.org> Mail-Followup-To: zsh-workers@zsh.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit X-Operating-System: Linux 3.2.0-4-amd64 X-Machine: sym2 x86_64 X-Editor: GNU Emacs 23.4.1 Face: 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 Organization: DeuxChevaux.org -- The =?iso-8859-1?Q?Citr?= =?iso-8859-1?B?b+tu?= 2CV Database User-Agent: Mutt/1.5.21 (2010-09-15) Hi, while I was debugging some non-zsh related issue with "yes '' | sometool", I noticed that zsh behaves differently in the following (possibly neither common nor useful, likely esoteric :-) case: ~ → cat /tmp/bar.txt bar ~ → zsh -c 'echo foo | cat -v < /tmp/bar.txt' foo bar ~ → bash -c 'echo foo | cat -v < /tmp/bar.txt' bar ~ → dash -c 'echo foo | cat -v < /tmp/bar.txt' bar ~ → ksh -c 'echo foo | cat -v < /tmp/bar.txt' bar ~ → mksh -c 'echo foo | cat -v < /tmp/bar.txt' bar Interestingly some non-POSIX shells have the probably sanest approach: ~ → tcsh -c 'echo foo | cat -v < /tmp/bar.txt' Ambiguous input redirect. ~ → csh -c 'echo foo | cat -v < /tmp/bar.txt' Ambiguous input redirect. (And yes, csh is _not_ a symlink to tcsh on that system. :-) Is this expected/wanted zsh behaviour? Is this something we should fix in zsh? And if so, should it rather behave like bash or like tcsh? :-) I tend to tcsh's variant although I suspect that this could cause more breakage than bash's behaviour. Kind regards, Axel -- /~\ Plain Text Ribbon Campaign | Axel Beckert \ / Say No to HTML in E-Mail and News | abe@deuxchevaux.org (Mail) X See http://www.nonhtmlmail.org/campaign.html | abe@noone.org (Mail+Jabber) / \ I love long mails: http://email.is-not-s.ms/ | http://noone.org/abe/ (Web)