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[79.211.171.78]) by smtp.gmail.com with ESMTPSA id c15sm65003036wrb.80.2019.08.21.12.22.31 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 21 Aug 2019 12:22:31 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Subject: Re: uname -a default options From: Gordon Bergling In-Reply-To: <201908171616.x7HGGhpK036345@gndrsh.dnsmgr.net> Date: Wed, 21 Aug 2019 21:22:30 +0200 Cc: Ian Lepore , freebsd-hackers@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: <67A10C58-7A1A-4E8E-A567-6A2AD3E195B1@gmail.com> References: <201908171616.x7HGGhpK036345@gndrsh.dnsmgr.net> To: "Rodney W. Grimes" X-Mailer: Apple Mail (2.3445.104.11) X-Rspamd-Queue-Id: 46DHcB3HzHz4MpJ X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=mCuow4S1; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of gbergling@gmail.com designates 2a00:1450:4864:20::329 as permitted sender) smtp.mailfrom=gbergling@gmail.com X-Spamd-Result: default: False [-3.49 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36]; FREEMAIL_FROM(0.00)[gmail.com]; MV_CASE(0.50)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; NEURAL_HAM_SHORT(-0.99)[-0.992,0]; RECEIVED_SPAMHAUS_PBL(0.00)[78.171.211.79.khpj7ygk5idzvmvt5x4ziurxhy.zen.dq.spamhaus.net : 127.0.0.10]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; MID_RHS_MATCH_FROM(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com.dwl.dnswl.org : 127.0.5.0]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; IP_SCORE(0.00)[ip: (-9.35), ipnet: 2a00:1450::/32(-3.02), asn: 15169(-2.35), country: US(-0.05)]; IP_SCORE_FREEMAIL(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[9.2.3.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.5.4.1.0.0.a.2.list.dnswl.org : 127.0.5.0]; RCVD_TLS_ALL(0.00)[] 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: Wed, 21 Aug 2019 19:22:35 -0000 Hi Rod, after reading the POSIX spec [1] I agree that the default options behind = =E2=80=9E-a" can not be changed. While reading the source of usr.bin/uname/uname.c I recognized that = FreeBSD=E2=80=99s uname is getting its information from sysctl calls. = Can you point me to right direction where in sys/ the sysctl = =E2=80=9Ekern.version=E2=80=9C (KERN_VERSION internally) is set? I would like create a small patch that changes =E2=80=9E-v=E2=80=9C=20 from "FreeBSD 12.0-STABLE r351343 GENERIC=E2=80=9C=20 to =E2=80=9Er351343 GENERIC=E2=80=9C for a further discussion. Kind Regards, Gordon [1] = https://pubs.opengroup.org/onlinepubs/9699919799/utilities/uname.html > Am 17.08.2019 um 18:16 schrieb Rodney W. Grimes = : >=20 >> On Sat, 2019-08-17 at 15:08 +0200, Gordon Bergling wrote: >>> Hello List, >>>=20 >>> "uname -a" is currently mapping the -a option to ?-mnrsv?, which >>> results in something similar like >>>=20 >>> $ uname -a >>> FreeBSD lion.0xfce3.net 12.0-STABLE = FreeBSD >>> 12.0-STABLE r350835 GENERIC amd64 >>>=20 >>> 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. >>>=20 >>> $ uname -vmn >>> lion.0xfce3.net FreeBSD 12.0-STABLE = r350835 >>> GENERIC amd64 >>>=20 >>> 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? >>>=20 >>> Best regards, >>>=20 >>> Gordon >>>=20 >>=20 >> 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. >=20 > 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. >=20 > 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 >=20 > 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 >=20 > 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=20 >=20 > So it is really our -v string that is full of redundant > data that MAY want to be evaluated for trimming. >=20 > --=20 > Rod Grimes = rgrimes@freebsd.org