From owner-freebsd-arch@freebsd.org Sun Feb 9 10:10:42 2020 Return-Path: Delivered-To: freebsd-arch@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id D21BD233A7E for ; Sun, 9 Feb 2020 10:10:42 +0000 (UTC) (envelope-from phk@critter.freebsd.dk) Received: from phk.freebsd.dk (phk.freebsd.dk [130.225.244.222]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 48FlD11vn5z3wmN for ; Sun, 9 Feb 2020 10:10:40 +0000 (UTC) (envelope-from phk@critter.freebsd.dk) Received: from critter.freebsd.dk (v-critter.freebsd.dk [192.168.55.3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by phk.freebsd.dk (Postfix) with ESMTPS id 59AA81AF101; Sun, 9 Feb 2020 10:10:38 +0000 (UTC) Received: from critter.freebsd.dk (localhost [127.0.0.1]) by critter.freebsd.dk (8.15.2/8.15.2) with ESMTPS id 019AAbYe008969 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Sun, 9 Feb 2020 10:10:37 GMT (envelope-from phk@critter.freebsd.dk) Received: (from phk@localhost) by critter.freebsd.dk (8.15.2/8.15.2/Submit) id 019AAZoa008968; Sun, 9 Feb 2020 10:10:35 GMT (envelope-from phk) To: "N.J. Mann" cc: freebsd-arch@freebsd.org Subject: Re: updating cron and atrun In-reply-to: <97A66670F59C9C626B5090E3@triton.njm.me.uk> From: "Poul-Henning Kamp" References: <6701.1581190231@critter.freebsd.dk> <97A66670F59C9C626B5090E3@triton.njm.me.uk> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <8966.1581243035.1@critter.freebsd.dk> Date: Sun, 09 Feb 2020 10:10:35 +0000 Message-ID: <8967.1581243035@critter.freebsd.dk> X-Rspamd-Queue-Id: 48FlD11vn5z3wmN X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of phk@critter.freebsd.dk designates 130.225.244.222 as permitted sender) smtp.mailfrom=phk@critter.freebsd.dk X-Spamd-Result: default: False [-1.91 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.98)[-0.978,0]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; NEURAL_HAM_LONG(-0.97)[-0.972,0]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[freebsd.dk]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; IP_SCORE(0.04)[ip: (0.06), ipnet: 130.225.0.0/16(0.07), asn: 1835(0.08), country: EU(-0.01)]; FORGED_SENDER(0.30)[phk@phk.freebsd.dk,phk@critter.freebsd.dk]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:1835, ipnet:130.225.0.0/16, country:EU]; FROM_NEQ_ENVFROM(0.00)[phk@phk.freebsd.dk,phk@critter.freebsd.dk]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 Feb 2020 10:10:42 -0000 -------- In message <97A66670F59C9C626B5090E3@triton.njm.me.uk>, "N.J. Mann" writes: >Hi, > >On Saturday, February 08, 2020 19:30:31 +0000 Poul-Henning Kamp wrote: >> >> Thanks for looking into this. >> >> Is at(1) something people actually use these days, or should it be >> disabled by default ? > >I do. I use it to run various homebrew scripts in response to external >events. I needed a delay (sometime minutes, sometimes hours) between >the event and the response and at(1) was a perfect fit. Right, it is absolutely useful to have, if you need it, and it should not be removed. But if, as I suspect, the vast majority of FreeBSD pointlessly add 288 lines to /var/log/cron every day, without anybody ever using the at(1) command, maybe we should disable it to save power and disk-wear ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.