From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 4832 invoked by alias); 12 Sep 2017 10:09:50 -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: 41678 Received: (qmail 1444 invoked by uid 1010); 12 Sep 2017 10:09:50 -0000 X-Qmail-Scanner-Diagnostics: from ioooi.vinc17.net by f.primenet.com.au (envelope-from , uid 7791) with qmail-scanner-2.11 (clamdscan: 0.99.2/21882. spamassassin: 3.4.1. Clear:RC:0(92.243.22.117):SA:0(-1.9/5.0):. Processed in 2.845554 secs); 12 Sep 2017 10:09:50 -0000 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on f.primenet.com.au X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD autolearn=ham autolearn_force=no version=3.4.1 X-Envelope-From: vincent@vinc17.net X-Qmail-Scanner-Mime-Attachments: | X-Qmail-Scanner-Zip-Files: | Date: Tue, 12 Sep 2017 12:02:57 +0200 From: Vincent Lefevre To: zsh-workers@zsh.org Subject: [BUG] exec + builtin and traps Message-ID: <20170912100257.GA32535@zira.vinc17.org> Mail-Followup-To: zsh-workers@zsh.org MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit X-Mailer-Info: https://www.vinc17.net/mutt/ User-Agent: Mutt/1.9.0-7151-vl-r99863 (2017-09-05) For zsh 5.4.1, the zshbuiltins(1) man page says: exec [ -cl ] [ -a argv0 ] [ command [ arg ... ] ] Replace the current shell with command rather than forking. If command is a shell builtin command or a shell function, the shell executes it, then immediately exits. But consider the following script: ---------------------------------------- #!/usr/bin/env zsh trap 'echo foo' USR1 echo $$ ( sleep 1; kill -USR1 $$ ) & exec eval sleep 2 ---------------------------------------- "foo" is printed, meaning that the shell does not immediately exit just after the command is executed, contrary to what the man page says. -- Vincent Lefèvre - Web: 100% accessible validated (X)HTML - Blog: Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)