Date: Wed, 21 Aug 2019 13:10:32 -0700 (PDT) From: "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net> To: Oliver Pinter <oliver.pinter@hardenedbsd.org> Cc: Gordon Bergling <gbergling@gmail.com>, "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net>, "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>, Ian Lepore <ian@freebsd.org> Subject: Re: uname -a default options Message-ID: <201908212010.x7LKAWsw055381@gndrsh.dnsmgr.net> In-Reply-To: <CAPQ4ffsX1ZtfXt_djsCJYbg7G6OFB2rZQVf_rzCdrBxUf2LiDw@mail.gmail.com>
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> On Wednesday, August 21, 2019, Gordon Bergling <gbergling@gmail.com> wrote: > > > Hi Rod, > > > > after reading the POSIX spec [1] I agree that the default options behind > > ?-a" can not be changed. > > > > While reading the source of usr.bin/uname/uname.c I recognized that > > FreeBSD?s uname is getting its information from sysctl calls. Can you point > > me to right direction where in sys/ the sysctl ?kern.version? (KERN_VERSION > > internally) is set? > > > > I would like create a small patch that changes ?-v? > > from "FreeBSD 12.0-STABLE r351343 GENERIC? > > to ?r351343 GENERIC? for a further discussion. > > > Please no. Keep them at the current behavior. Do you have some rational that the value -v should contain data that is already in -s and -r? I do know that -v gets "different" stuff if REPRODUCIBLE build is turned off, but I do not see the reason to include the values that are already avaliable in -s and -r. > > > > Kind Regards, > > > > Gordon > > > > [1] https://pubs.opengroup.org/onlinepubs/9699919799/utilities/uname.html > > > > > Am 17.08.2019 um 18:16 schrieb Rodney W. Grimes < > > freebsd-rwg@gndrsh.dnsmgr.net>: > > > > > >> 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 <http://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 <http://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 > > > > _______________________________________________ > > freebsd-hackers@freebsd.org mailing list > > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" > > -- Rod Grimes rgrimes@freebsd.org
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