From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from primenet.com.au (ns1.primenet.com.au [203.24.36.2]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 12fd3e9e for ; Mon, 1 Jul 2019 20:07:28 +0000 (UTC) Received: (qmail 22285 invoked by alias); 1 Jul 2019 20:07:23 -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: List-Unsubscribe: X-Seq: 44479 Received: (qmail 23768 invoked by uid 1010); 1 Jul 2019 20:07:23 -0000 X-Qmail-Scanner-Diagnostics: from mail-lj1-f180.google.com by f.primenet.com.au (envelope-from , uid 7791) with qmail-scanner-2.11 (clamdscan: 0.101.2/25496. spamassassin: 3.4.2. Clear:RC:0(209.85.208.180):SA:0(-1.9/5.0):. Processed in 1.802727 secs); 01 Jul 2019 20:07:23 -0000 X-Envelope-From: schaefer@brasslantern.com X-Qmail-Scanner-Mime-Attachments: | X-Qmail-Scanner-Zip-Files: | Received-SPF: pass (ns1.primenet.com.au: SPF record at _netblocks.google.com designates 209.85.208.180 as permitted sender) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=brasslantern-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=FDLSFeTrLR4/YkUBoyaCYUF6owKVXOTNXNXPO6DesPU=; b=Rcc9F83l8An0llmLiIjQ51c2OjOMa0zBJqDP6Kxf5IfKm0lYcdCmqxhpRFxRlizwHI aIeNGxjrpy2cY+sPt443KVgyLt+AOT8aIKYlMruJXGFMHlkoADArjxQT9Qv1O61nyevs iRACvAbgN08BLzAV9fZ5EKWp7qqVJC1F4iuc+iDQe9IC7m0NggQAJ02Pz4X6j2brYE6h mHLLCmOWrzmKLK2OkWBSJZ3BmKDXCfZRiy4CJB8JkHzRSfJpNDIrw30di44Ot6MLL3ww 2nxrs9ebM63NVGtqoM+n2DLrQFUKlcOoUNRme9ogVRLVMe4HDL3t7yXzmed3cS8qinKO P3Sw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=FDLSFeTrLR4/YkUBoyaCYUF6owKVXOTNXNXPO6DesPU=; b=OHx4kTE/9ScW0T1b0ZDCESAQi2uid7mhfv03U7t2b+sgB21JhNwZ7hU1FtUaml0xHL 3am4GQ62TsV+1JYnYkTxqMe7v6MrH0yWT+bRccrETLR2E4LSvhVDBXC2JZ40Pu+wCdu8 Uck19K2p6QJJdqKRD8niWFlqn7t9CwOzXS6hIV3k1d8i/R6BFWpiNPhLRc59NcV4+wVn vCvFmarQ4nSI+Bs/oLl2j4ZoMaISpDFJp1rFdR+blrQLnhzbY5yz8toNiy8SASVj7OFG 8XkH0IjMiPcjweiYVdYgsCEhpz+EquXNA47YcGmdSDOopTlgqdNkBQbFgVVb5yjCYTqg O0Kg== X-Gm-Message-State: APjAAAUk8Fq8dO93sKhPOEP/QaGGQtUurVyOfi3AM1m9DrJn5F8GuSDQ RIrPNNkm29pI1+0FNEMAH2atY8DdgBvqQhkwG7ifEQ== X-Google-Smtp-Source: APXvYqwN7MYJiyIQtxr/GRKcN04BX3gg8i+xbnllxAiAmbC6DXFt6xlBPXmxJHY7/hFkY8NHMmgpkOvnYAS0hzA/TUM= X-Received: by 2002:a2e:2d12:: with SMTP id t18mr3176281ljt.175.1562011607886; Mon, 01 Jul 2019 13:06:47 -0700 (PDT) MIME-Version: 1.0 References: <20190701100001.hbegs7zyu2auckhf@chaz.gmail.com> <1561975733.6006.2.camel@samsung.com> <1561994908.6006.19.camel@samsung.com> <20190701162202.5o3cxahc75e2hucz@chaz.gmail.com> <1561999973.6006.21.camel@samsung.com> <20190701200028.5ehhz6nsitc3bzfn@chaz.gmail.com> In-Reply-To: <20190701200028.5ehhz6nsitc3bzfn@chaz.gmail.com> From: Bart Schaefer Date: Mon, 1 Jul 2019 13:06:36 -0700 Message-ID: Subject: Re: <(...), >(...) and fds above 9 To: Peter Stephenson , "Zsh Hackers' List" Content-Type: text/plain; charset="UTF-8" On Mon, Jul 1, 2019 at 1:01 PM Stephane Chazelas wrote: > > It looks like the key is *background* here, and it sounds like > the reason is not so much about what the user expects but > possibly some implementation limitation/consideration > > Is it documented anywhere that fds above 9 are closed for all > commands started asynchronously? This is a process security thing, to prevent rogue processes that might be spawned from the shell having access to open files that they shouldn't.