From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 18868 invoked by alias); 19 Dec 2016 02:31:03 -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: 22236 Received: (qmail 28698 invoked from network); 19 Dec 2016 02:31:03 -0000 X-Qmail-Scanner-Diagnostics: from mail-vk0-f50.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(209.85.213.50):SA:0(-0.0/5.0):. Processed in 0.751273 secs); 19 Dec 2016 02:31:03 -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=RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_PASS,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: pass (ns1.primenet.com.au: SPF record at _netblocks.google.com designates 209.85.213.50 as permitted sender) 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=oRBtF26ZLvEHhn4WTAD52TMZ157HVmCgIKXUmuoqc24=; b=f3u6zaIuuNS360P8FYGArwJQErpXJWRmsZUGNh9LK3Yb1F4yf1XjGkEz+0BR/Q8W0R yyFHM6kgvfZmvEKqW/DYzZT++XqxZY0X6QpNA4Z91kPum2K1AAq/JLqT32fDs78JGLq/ ynHX17B2/P9G00W3+LR02tMTwJ6YVr8LBGA6kbzUL/x75+klY74fC3m/yBp6joz40fqP iT4WjW5m+o/gzqRMX8FE+NoN7LZkuO9X1AjxJtxUGuSW5Sag1zdKOmeo1XDGHRDwQmVJ /eXBs4BB8gZioTBqpn+9A7JIbo6ToRSD0+dis0qfHVd2DYlGYuriVYgf0ryZB5M55ugf trXA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:message-id:date:in-reply-to:comments :references:to:subject:mime-version; bh=oRBtF26ZLvEHhn4WTAD52TMZ157HVmCgIKXUmuoqc24=; b=FzmOHBC44KbWhiDX6MteVbZJNPUrBTNU6nI1oCikm6c2FI0e+gYfAqF1FQJnlch8qt L5I1j8VjjxvCBoNpXirs6MKE2cnKSeFDc7JvfCiRA5/sx6nqKQWkL7FltY2GWD3Ih9Nn tF5HmIUwbrL1byQvVMpdYRYtYdVriDPzUUJ+gBnkZm7PMJ1WVJjxQ7X7peFnk0DSsLm6 STAQn5AOVvytfhPNvDCJ5V7T4oO6QJrTQv0Bz6EPoykarj4CIBkpHgTZkp3ksLA3/67L 7YdVmcX7sL781SH+7Y65P/ibTv/y6BREAbflZNai8b2R16OT9Ow4Cre49MOKCMasKSVs 0lbg== X-Gm-Message-State: AIkVDXJ11LceDWDvgH9az3fEpsiGpZHtWir1ZxStYltlT9PF5EY173IM0JQ6bBsrit12/Q== X-Received: by 10.31.200.4 with SMTP id y4mr5238635vkf.115.1482114656556; Sun, 18 Dec 2016 18:30:56 -0800 (PST) From: Bart Schaefer Message-Id: <161218183056.ZM5304@torch.brasslantern.com> Date: Sun, 18 Dec 2016 18:30:56 -0800 In-Reply-To: <20161219003219.GA21509@fujitsu.shahaf.local2> Comments: In reply to Daniel Shahaf "Re: trapped in bash" (Dec 19, 12:32am) References: <58540944.3030706@eastlink.ca> <20161216215117.GF2023@pug.qqx.org> <58546D36.5050908@eastlink.ca> <161216150556.ZM4016@torch.brasslantern.com> <58559FC0.3080501@eastlink.ca> <161217124354.ZM7815@torch.brasslantern.com> <5855BEF2.6090208__18199.534857604$1482015164$gmane$org@eastlink.ca> <20161218150628.GB9158@fujitsu.shahaf.local2> <5856B133.9010602@eastlink.ca> <20161219003219.GA21509@fujitsu.shahaf.local2> X-Mailer: OpenZMail Classic (0.9.2 24April2005) To: zsh-users@zsh.org Subject: Re: trapped in bash MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii On Dec 19, 12:32am, Daniel Shahaf wrote: } } I suppose you could write a command_not_found_handler() function that } tried to reverse engineer _why_ the command wasn't found - with the } obvious limitations, e.g., race conditions between the library's } execution and the handler's. I don't think there can be a race here because the handler won't be invoked if the execve() hasn't already failed. Something like this: command_not_found_handler () { local attempt="$1" if [[ "$1" != /* && ( -o pathdirs || "$1 " != */* ) ]] then emulate zsh -c 'attempt=$^path/$1(N[1])' fi if [[ -f $attempt ]] then local hashbang read -u 0 -k 2 hashbang < "$attempt" case "$hashbang" in ('#!') print -u2 -- $1\: bad '#!' interpreter ;; (*) print -u2 failed to load $1 ;; esac else print -u2 -- $1\: no such file in \$PATH fi return 127 } -- Barton E. Schaefer