From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 9167 invoked by alias); 14 Sep 2016 17:59:12 -0000 Mailing-List: contact zsh-users-help@zsh.org; run by ezmlm Precedence: bulk X-No-Archive: yes List-Id: Zsh Users List List-Post: List-Help: X-Seq: 21908 Received: (qmail 20536 invoked from network); 14 Sep 2016 17:59:12 -0000 X-Qmail-Scanner-Diagnostics: from mail-pf0-f172.google.com 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(209.85.192.172):SA:0(0.0/5.0):. Processed in 0.118109 secs); 14 Sep 2016 17:59:12 -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=0.0 required=5.0 tests=T_DKIM_INVALID autolearn=unavailable autolearn_force=no version=3.4.1 X-Envelope-From: schaefer@brasslantern.com X-Qmail-Scanner-Mime-Attachments: | X-Qmail-Scanner-Zip-Files: | Received-SPF: none (ns1.primenet.com.au: domain at brasslantern.com does not designate permitted sender hosts) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=brasslantern-com.20150623.gappssmtp.com; s=20150623; h=from:message-id:date:in-reply-to:comments:references:to:subject :mime-version; bh=KxsvwtO9fO0hCDad8s1qkoHMyD4LcF737uYnSV3k0t0=; b=0XuCfPoolPaz+GtYh11AZrUtyuuwRlzR5HppVF3rQ2+j+72RkQ04CY45WNwUg1D68W 97GOnrkOc+9R5IZ/xMbEQ/izTYSBrQ20omEmqWiM7xBdX66gTkuOtE1QeguC3WPVH3S+ 0OjAPTfwcLHK5C/dEuu7u3EIF3Fy1YbPls31yAYV1ETwXVDoIDq1/PknhlVYFkT9onI6 bk64MROpu4BRpkBwQasYpLDt4vWDC7fhFyRlplU10zXPRDaS/kXXiqWCMJ5A3+kuPvKa DTz1bSs9KTM5e70kMhLzWIfnxUWbqyhRX5y3BbWfJQICUB/A6zODLPAmqhzbiPdUu17o DVlA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:message-id:date:in-reply-to:comments :references:to:subject:mime-version; bh=KxsvwtO9fO0hCDad8s1qkoHMyD4LcF737uYnSV3k0t0=; b=jQnbYBeIsf2yQu9N5UvWlDkknNcrq9oce6v7aT9PrSZByNYQKXMfqf7Z+cn3BCBcZQ J41MO0bEzQZMCj6VuXx+uTlH25klK9Ikv36xo8KJ5dFmoBtC7mms7S8PIIW+5ZoF1UC2 u9NEW+ky9n1sgriClOb6h9SwpKKn61eTOrqtoJNX7uLeGsZEJUDcw2AP7snEz53XH53r rFON9LCVUDPSGobPqbv6kCcVkPjSunNdiUf/DNsicNkcg9nkfMr7RHpXXIBDMRm2/cjd sPEgOKBi4tFB7QdOHSjyVtBFgNdxVnfZ+H/plyR3GjHdULx/rnF5gQ7wsupUYHcaWHuX M5wQ== X-Gm-Message-State: AE9vXwOfNkOaT3mslXOzvGzrn8GvHSOCgukGwGgs6S0liIUVCRqI0dYRZj208b0z22wCGw== X-Received: by 10.98.54.199 with SMTP id d190mr6802001pfa.121.1473875620199; Wed, 14 Sep 2016 10:53:40 -0700 (PDT) From: Bart Schaefer Message-Id: <160914105352.ZM29864@torch.brasslantern.com> Date: Wed, 14 Sep 2016 10:53:52 -0700 In-Reply-To: Comments: In reply to Sebastian Gniazdowski "Re: Do file descriptors survive to subshell?" (Sep 13, 10:54am) References: <20160912171959.2516a91e@pwslap01u.europe.root.pri> <160912112451.ZM25357@torch.brasslantern.com> X-Mailer: OpenZMail Classic (0.9.2 24April2005) To: Zsh Users Subject: Re: Do file descriptors survive to subshell? MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii On Sep 13, 10:54am, Sebastian Gniazdowski wrote: } } That's quite regretful, how to check if a read descriptor is valid? Under "Conditional Expressions": [...] -r FILE true if FILE exists and is readable by current process. [...] In each of the above expressions, if FILE is of the form `/dev/fd/N', where N is an integer, then the test applied to the open file whose descriptor number is N, even if the underlying system does not support the /dev/fd directory. [...]