From owner-svn-src-all@freebsd.org Mon Jul 27 15:25:04 2020 Return-Path: <owner-svn-src-all@freebsd.org> 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 E58C5366278; Mon, 27 Jul 2020 15:25:04 +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 4BFkBm5qrXz3fBq; Mon, 27 Jul 2020 15:25:04 +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 A880F1FCAC; Mon, 27 Jul 2020 15:25:04 +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 06RFP41W012993; Mon, 27 Jul 2020 15:25:04 GMT (envelope-from fernape@FreeBSD.org) Received: (from fernape@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 06RFP4JU012992; Mon, 27 Jul 2020 15:25:04 GMT (envelope-from fernape@FreeBSD.org) Message-Id: <202007271525.06RFP4JU012992@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?= <fernape@FreeBSD.org> Date: Mon, 27 Jul 2020 15:25:04 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r363611 - head/usr.bin/truncate X-SVN-Group: head X-SVN-Commit-Author: fernape X-SVN-Commit-Paths: head/usr.bin/truncate X-SVN-Commit-Revision: 363611 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 \(except for " user" and " projects" \)" <svn-src-all.freebsd.org> List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-all>, <mailto:svn-src-all-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/svn-src-all/> List-Post: <mailto:svn-src-all@freebsd.org> List-Help: <mailto:svn-src-all-request@freebsd.org?subject=help> List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-all>, <mailto:svn-src-all-request@freebsd.org?subject=subscribe> X-List-Received-Date: Mon, 27 Jul 2020 15:25:05 -0000 Author: fernape (ports committer) Date: Mon Jul 27 15:25:04 2020 New Revision: 363611 URL: https://svnweb.freebsd.org/changeset/base/363611 Log: truncate(1): Add EXAMPLES section Add four simple examples showing the use of -c, -r and -s Approved by: manpages (bcr@) Differential Revision: https://reviews.freebsd.org/D25774 Modified: head/usr.bin/truncate/truncate.1 Modified: head/usr.bin/truncate/truncate.1 ============================================================================== --- head/usr.bin/truncate/truncate.1 Mon Jul 27 15:09:07 2020 (r363610) +++ head/usr.bin/truncate/truncate.1 Mon Jul 27 15:25:04 2020 (r363611) @@ -25,7 +25,7 @@ .\" .\" $FreeBSD$ .\" -.Dd December 19, 2006 +.Dd July 27, 2020 .Dt TRUNCATE 1 .Os .Sh NAME @@ -143,6 +143,43 @@ If the operation fails for an argument, .Nm will issue a diagnostic and continue processing the remaining arguments. +.Sh EXAMPLES +Adjust the size of the file +.Pa test_file +to 10 Megabytes but do not create it if it does not exist: +.Bd -literal -offset indent +truncate -c -s +10M test_file +.Ed +.Pp +Same as above but create the file if it does not exist: +.Bd -literal -offset indent +truncate -s +10M test_file +ls -l test_file +-rw-r--r-- 1 root wheel 10485760 Jul 22 18:48 test_file +.Ed +.Pp +Adjust the size of +.Pa test_file +to the size of the kernel and create another file +.Pa test_file2 +with the same size: +.Bd -literal -offset indent +truncate -r /boot/kernel/kernel test_file test_file2 +ls -l /boot/kernel/kernel test_file* +-r-xr-xr-x 1 root wheel 31352552 May 15 14:18 /boot/kernel/kernel* +-rw-r--r-- 1 root wheel 31352552 Jul 22 19:15 test_file +-rw-r--r-- 1 root wheel 31352552 Jul 22 19:15 test_file2 +.Ed +.Pp +Downsize +.Pa test_file +in 5 Megabytes: +.Bd -literal -offset indent +# truncate -s -5M test_file +ls -l test_file* +-rw-r--r-- 1 root wheel 26109672 Jul 22 19:17 test_file +-rw-r--r-- 1 root wheel 31352552 Jul 22 19:15 test_file2 +.Ed .Sh SEE ALSO .Xr dd 1 , .Xr touch 1 ,