From owner-freebsd-hackers@freebsd.org Sun Dec 2 04:34:03 2018 Return-Path: Delivered-To: freebsd-hackers@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 D6F5F130FF15; Sun, 2 Dec 2018 04:34:03 +0000 (UTC) (envelope-from freebsd-rwg@pdx.rh.CN85.dnsmgr.net) Received: from pdx.rh.CN85.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 EA56E836CF; Sun, 2 Dec 2018 04:34:02 +0000 (UTC) (envelope-from freebsd-rwg@pdx.rh.CN85.dnsmgr.net) Received: from pdx.rh.CN85.dnsmgr.net (localhost [127.0.0.1]) by pdx.rh.CN85.dnsmgr.net (8.13.3/8.13.3) with ESMTP id wB247Ofv026370; Sat, 1 Dec 2018 20:07:24 -0800 (PST) (envelope-from freebsd-rwg@pdx.rh.CN85.dnsmgr.net) Received: (from freebsd-rwg@localhost) by pdx.rh.CN85.dnsmgr.net (8.13.3/8.13.3/Submit) id wB247NA5026369; Sat, 1 Dec 2018 20:07:23 -0800 (PST) (envelope-from freebsd-rwg) From: "Rodney W. Grimes" Message-Id: <201812020407.wB247NA5026369@pdx.rh.CN85.dnsmgr.net> Subject: Re: How to use trim command ? In-Reply-To: To: Warner Losh Date: Sat, 1 Dec 2018 20:07:23 -0800 (PST) CC: Rebecca Cran , ish@amail.plala.or.jp, "freebsd-hackers@freebsd.org" , "freebsd-hackers@freebsd.org" , Eugene Grosbein , Ian Lepore 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: EA56E836CF X-Spamd-Result: default: False [2.48 / 15.00]; ARC_NA(0.00)[]; TO_DN_EQ_ADDR_SOME(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; DMARC_NA(0.00)[dnsmgr.net]; AUTH_NA(1.00)[]; NEURAL_SPAM_MEDIUM(0.21)[0.209,0]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; MX_GOOD(-0.01)[cached: pdx.rh.CN85.dnsmgr.net]; NEURAL_SPAM_LONG(0.70)[0.696,0]; RCPT_COUNT_SEVEN(0.00)[7]; NEURAL_HAM_SHORT(-0.30)[-0.297,0]; R_SPF_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:13868, ipnet:69.59.192.0/19, country:US]; MID_RHS_MATCH_FROM(0.00)[]; IP_SCORE(-0.02)[country: US(-0.09)] X-Rspamd-Server: mx1.freebsd.org 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: Sun, 02 Dec 2018 04:34:04 -0000 > On Sat, Dec 1, 2018 at 12:50 AM Rebecca Cran via freebsd-hackers < > freebsd-hackers@freebsd.org> wrote: > > > On Friday, 30 November 2018 17:36:01 MST Eugene Grosbein wrote: > > > 01.12.2018 6:56, Ian Lepore wrote: > > > > > newfs destroys data too, cat > /dev/da0 does this too, > > > add the name "dd" itself does not imply data destruction. > > > > > Can you invent better name? > > > > 'discard'? > > > > That's a good name. trim has the unfortunate collision with the perl 'trim' > function and similar things that I didn't think of when I recommended it. > It's also nicely technology agnostic. That word is also used in other parts of FreeBSD in similiar situations: strip(1) - discard information from ELF objects disc, if_disc(4) - software discard network interface edsc, if_edsc(4) - Ethernet discard network interface ng_hole(4) - netgraph discard node type I was kinda suprized to see strip come up.... -- Rod Grimes rgrimes@freebsd.org