From owner-freebsd-hackers@freebsd.org Sat Aug 17 16:16:47 2019 Return-Path: Delivered-To: freebsd-hackers@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 A7DDACB305 for ; Sat, 17 Aug 2019 16:16:47 +0000 (UTC) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: from gndrsh.dnsmgr.net (br1.CN84in.dnsmgr.net [69.59.192.140]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 469lgg2sJvz4W0F; Sat, 17 Aug 2019 16:16:46 +0000 (UTC) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: from gndrsh.dnsmgr.net (localhost [127.0.0.1]) by gndrsh.dnsmgr.net (8.13.3/8.13.3) with ESMTP id x7HGGhGJ036346; Sat, 17 Aug 2019 09:16:43 -0700 (PDT) (envelope-from freebsd-rwg@gndrsh.dnsmgr.net) Received: (from freebsd-rwg@localhost) by gndrsh.dnsmgr.net (8.13.3/8.13.3/Submit) id x7HGGhpK036345; Sat, 17 Aug 2019 09:16:43 -0700 (PDT) (envelope-from freebsd-rwg) From: "Rodney W. Grimes" Message-Id: <201908171616.x7HGGhpK036345@gndrsh.dnsmgr.net> Subject: Re: uname -a default options In-Reply-To: <7d1f88943c0b744920d7181df51b76675d145f18.camel@freebsd.org> To: Ian Lepore Date: Sat, 17 Aug 2019 09:16:43 -0700 (PDT) CC: Gordon Bergling , freebsd-hackers@freebsd.org X-Mailer: ELM [version 2.4ME+ PL121h (25)] MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII X-Rspamd-Queue-Id: 469lgg2sJvz4W0F X-Spamd-Bar: ------ Authentication-Results: mx1.freebsd.org; none X-Spamd-Result: default: False [-6.96 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; REPLY(-4.00)[]; NEURAL_HAM_SHORT(-0.96)[-0.959,0] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 17 Aug 2019 16:16:47 -0000 > On Sat, 2019-08-17 at 15:08 +0200, Gordon Bergling wrote: > > Hello List, > > > > "uname -a" is currently mapping the -a option to ?-mnrsv?, which > > results in something similar like > > > > $ uname -a > > FreeBSD lion.0xfce3.net 12.0-STABLE FreeBSD > > 12.0-STABLE r350835 GENERIC amd64 > > > > What would you think about reducing the option mapping for ?-a? to ?- > > vmn? , which would result in a less repetitive version string like > > the one below. > > > > $ uname -vmn > > lion.0xfce3.net FreeBSD 12.0-STABLE r350835 > > GENERIC amd64 > > > > Adapting this would be trivial, but before I hack something together, > > I would like to get some feedback if such a change would be welcomed? > > > > Best regards, > > > > Gordon > > > > I think there are likely very many existing scripts in the world that > parse the output of uname -a and would break if the fields moved around > or disappeared. I agree that we should not change the output of uname -a, for one it is a POSIX spec'ed command, though I would not expect scripts to be parsing the output of -a, they should actually invoke the more specific item(s) they need and parse those, a much less error prone methods. I would however like to note that Linux (or atleast Ubuntu 19.04) has a man page that -a says "All of the below" and are infact returning more info than the Posix man page which says -a is -mnrsv rgrimes@mgmt:~$ uname -a Linux mgmt 5.1.0-rc2+ #14 SMP Sun Aug 4 09:23:12 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux rgrimes@mgmt:~$ man uname rgrimes@mgmt:~$ uname -mnrsv Linux mgmt 5.1.0-rc2+ #14 SMP Sun Aug 4 09:23:12 UTC 2019 x86_64 rgrimes@mgmt:~$ uname -m x86_64 rgrimes@mgmt:~$ uname -n mgmt rgrimes@mgmt:~$ uname -r 5.1.0-rc2+ rgrimes@mgmt:~$ uname -s Linux rgrimes@mgmt:~$ uname -v #14 SMP Sun Aug 4 09:23:12 UTC 2019 FreeBSD: root {1003}# uname -a FreeBSD w530a.dnsmgr.net 12.0-RELEASE FreeBSD 12.0-RELEASE r341666 GENERIC amd64 root {1004}# uname -m amd64 root {1005}# uname -n w530a.dnsmgr.net root {1006}# uname -r 12.0-RELEASE root {1007}# uname -s FreeBSD root {1008}# uname -v FreeBSD 12.0-RELEASE r341666 GENERIC So it is really our -v string that is full of redundant data that MAY want to be evaluated for trimming. -- Rod Grimes rgrimes@freebsd.org