From owner-svn-src-all@freebsd.org Tue Jun 16 15:55:00 2020 Return-Path: Delivered-To: svn-src-all@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 6850633FF3D; Tue, 16 Jun 2020 15:55:00 +0000 (UTC) (envelope-from fernape@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49mXpD28JVz4DMJ; Tue, 16 Jun 2020 15:55:00 +0000 (UTC) (envelope-from fernape@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 433F31182F; Tue, 16 Jun 2020 15:55:00 +0000 (UTC) (envelope-from fernape@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 05GFt0Zh084529; Tue, 16 Jun 2020 15:55:00 GMT (envelope-from fernape@FreeBSD.org) Received: (from fernape@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 05GFt03C084528; Tue, 16 Jun 2020 15:55:00 GMT (envelope-from fernape@FreeBSD.org) Message-Id: <202006161555.05GFt03C084528@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: fernape set sender to fernape@FreeBSD.org using -f From: =?UTF-8?Q?Fernando_Apestegu=c3=ada?= Date: Tue, 16 Jun 2020 15:55:00 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r362229 - head/usr.bin/cmp X-SVN-Group: head X-SVN-Commit-Author: fernape X-SVN-Commit-Paths: head/usr.bin/cmp X-SVN-Commit-Revision: 362229 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Jun 2020 15:55:00 -0000 Author: fernape (ports committer) Date: Tue Jun 16 15:54:59 2020 New Revision: 362229 URL: https://svnweb.freebsd.org/changeset/base/362229 Log: cmp(1): Add EXAMPLES section Add simple examples showing the use of -l, -z, stdin and offsets Approved by: bcr@ Differential Revision: https://reviews.freebsd.org/D25280 Modified: head/usr.bin/cmp/cmp.1 Modified: head/usr.bin/cmp/cmp.1 ============================================================================== --- head/usr.bin/cmp/cmp.1 Tue Jun 16 14:02:51 2020 (r362228) +++ head/usr.bin/cmp/cmp.1 Tue Jun 16 15:54:59 2020 (r362229) @@ -31,7 +31,7 @@ .\" @(#)cmp.1 8.1 (Berkeley) 6/6/93 .\" $FreeBSD$ .\" -.Dd May 1, 2018 +.Dd June 16, 2020 .Dt CMP 1 .Os .Sh NAME @@ -106,6 +106,40 @@ file (before any differences were found). .It >1 An error occurred. .El +.Sh EXAMPLES +Assuming a file named example.txt with the following contents: +.Bd -literal -offset indent +a +b +c +.Ed +.Pp +Compare stdin with example.txt: +.Bd -literal -offset indent +$ echo -e "a\\nb\\nc" | cmp - example.txt +.Ed +.Pp +Same as above but introducing a change in byte three in stdin. +Show the byte number (decimal) and differing byte (octal): +.Bd -literal -offset indent +$ echo -e "a\\nR\\nc" | cmp -l - example.txt + 3 122 142 +.Ed +.Pp +Compare example.txt and /boot/loader.conf exiting if size differs. +Note that +.Fl z +can only be used with regular files: +.Bd -literal -offset indent +$ cmp -z example.txt /boot/loader.conf +example.txt /boot/loader.conf differ: size +.Ed +.Pp +Compare stdin with file example.txt omitting the 4 first bytes from stdin and +the 2 first bytes from example.txt: +.Bd -literal -offset indent +$ echo -e "a\\nR\\nb\\nc" | cmp - example.txt 4 2 +.Ed .Sh SEE ALSO .Xr diff 1 , .Xr diff3 1