Date: Wed, 10 Apr 2019 17:40:42 -0400 (EDT) From: Walter Cramer <wfc@mintsol.com> To: Software Info <softwareinfojam@gmail.com> Cc: Jonathan Chen <jonc@chen.org.nz>, "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org> Subject: RE: Crontab Question Message-ID: <20190410172638.C14867@mulder.mintsol.com> In-Reply-To: <5cae5cc3.1c69fb81.15e0.dbd1@mx.google.com> References: <5cae4e6f.1c69fb81.95785.62bf@mx.google.com> <CAJuc1zNRcG5WaZ4weC=TNLuXCfT=oxMtismm%2B6apWXEtJZhH3A@mail.gmail.com> <5cae5cc3.1c69fb81.15e0.dbd1@mx.google.com>
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On Wed, 10 Apr 2019, Software Info wrote: > OK. So although the script is located in my home directory, it doesn=E2= =80=99t=20 > start there? Sorry but I don=E2=80=99t quite understand. Could you expla= in a=20 > little further please? Both 'cp' and 'ls' are located in /bin. But if I run the 'ls' command in= =20 /root, 'ls' can't find 'cp' (unless I tell it where to look) - even though= =20 /bin *is* in my PATH - server7:/root # ls cp ls: cp: No such file or directory server7:/root # ls /bin/cp /bin/cp Where the system looks for *commands*, to execute, is different from where= =20 it looks for other files, which those commands use. The latter is=20 generally only the current directory (unless you tell it otherwise).=20 When cron runs a script as root, "current directory" will be /root. BUT - for security and other reasons, it would be better to have cron run= =20 your script as you (not root), and as '/home/me/myscript' (instead of=20 adding your home directory to PATH in /etc/crontab). -Walter From owner-freebsd-stable@freebsd.org Wed Apr 10 21:43:37 2019 Return-Path: <owner-freebsd-stable@freebsd.org> Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 59767156E564 for <freebsd-stable@mailman.ysv.freebsd.org>; Wed, 10 Apr 2019 21:43:37 +0000 (UTC) (envelope-from jonc@chen.org.nz) Received: from mail-vs1-xe2b.google.com (mail-vs1-xe2b.google.com [IPv6:2607:f8b0:4864:20::e2b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 6DE9A8CF85 for <freebsd-stable@freebsd.org>; Wed, 10 Apr 2019 21:43:36 +0000 (UTC) (envelope-from jonc@chen.org.nz) Received: by mail-vs1-xe2b.google.com with SMTP id g187so2265307vsc.8 for <freebsd-stable@freebsd.org>; 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Wed, 10 Apr 2019 14:43:35 -0700 (PDT) MIME-Version: 1.0 References: <5cae4e6f.1c69fb81.95785.62bf@mx.google.com> <CAJuc1zNRcG5WaZ4weC=TNLuXCfT=oxMtismm+6apWXEtJZhH3A@mail.gmail.com> <5cae5cc3.1c69fb81.15e0.dbd1@mx.google.com> <CAJuc1zNdGBRWcdjwdOw+U7bqChRcFPqnKpS-kskhnpHvN=2d+A@mail.gmail.com> <5cae6179.1c69fb81.12661.3a08@mx.google.com> In-Reply-To: <5cae6179.1c69fb81.12661.3a08@mx.google.com> From: Jonathan Chen <jonc@chen.org.nz> Date: Thu, 11 Apr 2019 09:43:19 +1200 Message-ID: <CAJuc1zPPQxd71aTkeHGhMcNMF7CEx9Evd4Q1FrVx_Ah0PjRA5Q@mail.gmail.com> Subject: Re: Crontab Question To: Software Info <softwareinfojam@gmail.com> Cc: "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 6DE9A8CF85 X-Spamd-Bar: ------ Authentication-Results: mx1.freebsd.org; dkim=pass header.d=chen-org-nz.20150623.gappssmtp.com header.s=20150623 header.b=BHbrJEJo X-Spamd-Result: default: False [-6.20 / 15.00]; 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List-Post: <mailto:freebsd-stable@freebsd.org> List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help> List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-stable>, <mailto:freebsd-stable-request@freebsd.org?subject=subscribe> X-List-Received-Date: Wed, 10 Apr 2019 21:43:37 -0000 On Thu, 11 Apr 2019 at 09:34, Software Info <softwareinfojam@gmail.com> wro= te: > > I see. I had however copied the output of env to the etc/crontab PATH lin= e. Wouldn=E2=80=99t that care for an environment issue though? When I say "environment", I mean it in the generic sense; including working-directory. However, best practise is to keep /etc/crontab as minimal as possible, and to set up environ(7) within the invoked script-file. Security-wise, you should just keep PATH in /etc/crontab to the standard, and invoke your script with: * * * * * user /path/to/my/script This is especially important when running as root. Cheers. --=20 Jonathan Chen <jonc@chen.org.nz>
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