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-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 autolearn=ham autolearn_force=no version=3.4.1 Date: Sat, 16 Apr 2016 12:13:21 -0700 From: frederik@ofb.net To: Bart Schaefer Cc: zsh-workers@zsh.org Subject: Re: exec redirect prevents trap Message-ID: <20160416191321.GA13911@ofb.net> Reply-To: frederik@ofb.net References: <20160416075941.GA27994@ofb.net> <160416093433.ZM24261@torch.brasslantern.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <160416093433.ZM24261@torch.brasslantern.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: X-Seq: zsh-workers 38293 On Sat, Apr 16, 2016 at 09:34:33AM -0700, Bart Schaefer wrote: > On Apr 16, 12:59am, frederik@ofb.net wrote: > } > } #!/bin/zsh > } exec > >(tee -a /tmp/foo) > } trap "echo hi" INT TERM EXIT > } sleep 1d; > } > } When I run it and hit ^C, it doesn't print anything. But when I remove > } the "exec" line and do the same, it prints "hi". > > I suspect what you have here is a race condition. When zsh exits, > it first sends a HUP signal to all its children, including the tee > process. If tee dies before the exit trap runs, the "hi" will go > nowhere. > > Try one of these: > > exec > >(trap '' HUP; tee -a /tmp/foo) > > exec > >(tee -a /tmp/foo &! ) > The second one works, thank you. Not sure why the first one doesn't work for me... In my script, I had something like: trap "echo hi; rm -f bar" INT TERM EXIT and I noticed that 'bar' wasn't getting removed. But changing it to trap "rm -f bar; echo hi" INT TERM EXIT works, so I guess that must also have been a problem with 'tee' exiting. My apologies, I guess this was more of a zsh-users question... Thank you, Frederick