From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.5 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, MAILING_LIST_MULTI,PP_MIME_FAKE_ASCII_TEXT,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 5563 invoked from network); 16 Jul 2021 14:17:46 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 16 Jul 2021 14:17:46 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id AF4E09C83D; Sat, 17 Jul 2021 00:17:43 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 7FED99C7F1; Sat, 17 Jul 2021 00:17:22 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=utah.edu header.i=@utah.edu header.b="SFmzWJAr"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 9E42F9C7F1; Sat, 17 Jul 2021 00:17:20 +1000 (AEST) Received: from ipo12.cc.utah.edu (ipo12.cc.utah.edu [155.97.144.22]) by minnie.tuhs.org (Postfix) with ESMTPS id 3AE439C7F0 for ; Sat, 17 Jul 2021 00:17:19 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=utah.edu; i=@utah.edu; q=dns/txt; s=UniversityOfUtah; t=1626445039; x=1657981039; h=date:from:to:cc:subject:in-reply-to:message-id; bh=cUWZ+EsKW2S2L+GHYjlLpkD2gqqup2NnbP8F9nmlJQk=; b=SFmzWJArL/gmZHxyefHQHUCUXLY6XgUzVWI192FY32IxnNpp0RHnIX8g HUbTqkIoSr4hJhSGhJsh5gCZAmZh/QxUVUQFm5/KYQ23Ucrt06asIRyvD 2gA2lwTdJhNwnA70XVM/FQS/0JKHyxTFiAWIgWDpu1SIk9rqGMQFc7xgY QWqnFbG6KyOxOfTSozNTilLvzdGqkX4Ca3o/U+zAv+9fFGQo0MAn1yHtm z4syfA+3dYGSWVfAG7OduQloSUJDDXSljCRsPRfON1bfQRaWE/JHX/k2a Z5cAe0qKeAW2GSZW4/p++qp77Nd0I/gGF7iwP28dkTG346ltgmquVREhl g==; IronPort-SDR: MEUPXoYpXbRwBxTi+KjAQWIFMX9Xv2vO8ZxrtbaIvuxv4ZZaDSdkP5aMPCHYJswK+2QW6td0F4 /0mPJo3t1TmZxBIcafY9obMS+06IO6SWykc8nzAiWrJogJgV4/QeEQD9HGzgoJMa33X69LfR4X K/Bk235iqyTAdWX2RiykGHmeM/hA4cIvbLQXp3kzdMqO7q+/267C6t7+3NTcXgo0Z16Tpje30n RTjHLY0JlX/mrozl6mmJ++PHEKn85IisyRNBTYI7awqkGFXlceNNJ2avW/jLt132dD0YEw8QIP mcw= X-IronPort-AV: E=Sophos;i="5.84,245,1620712800"; d="scan'208";a="115841273" Received: from mail.math.utah.edu ([155.101.98.135]) by ipo12smtp.cc.utah.edu with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Jul 2021 08:17:18 -0600 Received: from gamma.math.utah.edu (gamma.math.utah.edu [155.101.96.20]) by mail.math.utah.edu (8.16.1/8.16.1) with ESMTP id 16GEHIXd024652; Fri, 16 Jul 2021 08:17:18 -0600 (MDT) Received: from gamma.math.utah.edu (localhost [127.0.0.1]) by gamma.math.utah.edu (8.15.1/8.15.1) with ESMTP id 16GEHIJc023872; Fri, 16 Jul 2021 08:17:18 -0600 Received: (from beebe@localhost) by gamma.math.utah.edu (8.15.1/8.15.1/Submit) id 16GEHIa6023871; Fri, 16 Jul 2021 08:17:18 -0600 Date: Fri, 16 Jul 2021 08:17:18 -0600 From: "Nelson H. F. Beebe" To: Douglas McIlroy , "The Unix Heritage Society mailing list" X-US-Mail: "Department of Mathematics, 110 LCB, University of Utah, 155 S 1400 E RM 233, Salt Lake City, UT 84112-0090, USA" X-Telephone: +1 801 581 5254 X-FAX: +1 801 581 4148 X-URL: http://www.math.utah.edu/~beebe In-Reply-To: Message-ID: X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.3.8 (mail.math.utah.edu [155.101.98.135]); Fri, 16 Jul 2021 08:17:18 -0600 (MDT) Subject: Re: [TUHS] head/sed/tail (was The Unix shell: a 50-year view) X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" Doug McIlroy asks about the Rosetta Stone table relating TOPS-20 commands to Unix command in my ``Unix for TOPS-20 Users'' document: >> I was puzzled, though, by the Unix command "leave", which is >> not in the manuals I edited, nor is it in Linux. What does >> (or did) it do? I reread that 1987 document this morning, and found a few small mistakes, but on the whole, I still agree with what I wrote 34 years ago, and I'm pleased that almost everything there about Unix still applies today. I confess that I had forgotten about the TOPS-20 ALERT command and its Unix equivalent, leave. As Doug noted, leave is not in Linux systems, but it still exists in the BSD world, in DragonFlyBSD, FreeBSD, NetBSD, OpenBSD, and their many derivatives. From a bleeding-edge FreeBSD 14 system, I find % man leave LEAVE(1) FreeBSD General Commands Manual LEAVE(1) NAME leave – remind you when you have to leave SYNOPSIS leave [[+]hhmm] DESCRIPTION The leave utility waits until the specified time, then reminds you that you have to leave. You are reminded 5 minutes and 1 minute before the actual time, at the time, and every minute thereafter. When you log off, leave exits just before it would have printed the next message. ... ------------------------------------------------------------------------------- - Nelson H. F. Beebe Tel: +1 801 581 5254 - - University of Utah FAX: +1 801 581 4148 - - Department of Mathematics, 110 LCB Internet e-mail: beebe@math.utah.edu - - 155 S 1400 E RM 233 beebe@acm.org beebe@computer.org - - Salt Lake City, UT 84112-0090, USA URL: http://www.math.utah.edu/~beebe/ - -------------------------------------------------------------------------------