From owner-svn-src-all@freebsd.org Thu Jun 18 08:31:04 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 E8E63348D96; Thu, 18 Jun 2020 08:31:04 +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 49nZs45rjkz4Jbm; Thu, 18 Jun 2020 08:31:04 +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 C3F6A2E0BF; Thu, 18 Jun 2020 08:31:04 +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 05I8V4hE097326; Thu, 18 Jun 2020 08:31:04 GMT (envelope-from fernape@FreeBSD.org) Received: (from fernape@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 05I8V4kR097325; Thu, 18 Jun 2020 08:31:04 GMT (envelope-from fernape@FreeBSD.org) Message-Id: <202006180831.05I8V4kR097325@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: Thu, 18 Jun 2020 08:31:04 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r362299 - head/usr.bin/lockf X-SVN-Group: head X-SVN-Commit-Author: fernape X-SVN-Commit-Paths: head/usr.bin/lockf X-SVN-Commit-Revision: 362299 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: Thu, 18 Jun 2020 08:31:05 -0000 Author: fernape (ports committer) Date: Thu Jun 18 08:31:04 2020 New Revision: 362299 URL: https://svnweb.freebsd.org/changeset/base/362299 Log: lockf(1): Add EXAMPLES section * Add pretty small EXAMPLES section * While here, fix a warning in line 98 (new sentence in new line) Approved by: bcr@ Differential Revision: https://reviews.freebsd.org/D25205 Modified: head/usr.bin/lockf/lockf.1 Modified: head/usr.bin/lockf/lockf.1 ============================================================================== --- head/usr.bin/lockf/lockf.1 Thu Jun 18 08:26:26 2020 (r362298) +++ head/usr.bin/lockf/lockf.1 Thu Jun 18 08:31:04 2020 (r362299) @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd July 7, 1998 +.Dd June 18, 2020 .Dt LOCKF 1 .Os .Sh NAME @@ -95,7 +95,8 @@ Causes .Nm to fail if the specified lock .Ar file -does not exist. If +does not exist. +If .Fl n is not specified, .Nm @@ -160,6 +161,25 @@ The did not exit normally, but may have been signaled or stopped. .El +.Sh EXAMPLES +The first job takes a lock and sleeps for 5 seconds in the background. +The second job tries to get the lock and timeouts after 1 second (PID numbers +will differ): +.Bd -literal -offset indent +$ lockf mylock sleep 5 & lockf -t 1 mylock echo "Success" +[1] 94410 +lockf: mylock: already locked +.Ed +.Pp +The first job takes a lock and sleeps for 1 second in the background. +The second job waits up to 5 seconds to take the lock and echoes the message on +success (PID numbers will differ): +.Bd -literal -offset indent +$ lockf mylock sleep 1 & lockf -t 5 mylock echo "Success" +[1] 19995 +Success +[1]+ Done lockf mylock sleep 1 +.Ed .Sh SEE ALSO .Xr flock 2 , .Xr lockf 3 ,