From owner-svn-src-all@freebsd.org Mon Mar 11 13:33:04 2019 Return-Path: Delivered-To: svn-src-all@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 6FC9C1543525; Mon, 11 Mar 2019 13:33:04 +0000 (UTC) (envelope-from lidl@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) server-signature RSA-PSS (4096 bits) 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 151CC9628A; Mon, 11 Mar 2019 13:33:04 +0000 (UTC) (envelope-from lidl@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 04A40B716; Mon, 11 Mar 2019 13:33:04 +0000 (UTC) (envelope-from lidl@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x2BDX3Yj077125; Mon, 11 Mar 2019 13:33:03 GMT (envelope-from lidl@FreeBSD.org) Received: (from lidl@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x2BDX3j2077124; Mon, 11 Mar 2019 13:33:03 GMT (envelope-from lidl@FreeBSD.org) Message-Id: <201903111333.x2BDX3j2077124@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: lidl set sender to lidl@FreeBSD.org using -f From: Kurt Lidl Date: Mon, 11 Mar 2019 13:33:03 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r345005 - head/libexec/rc/rc.d X-SVN-Group: head X-SVN-Commit-Author: lidl X-SVN-Commit-Paths: head/libexec/rc/rc.d X-SVN-Commit-Revision: 345005 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 151CC9628A X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.95 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-0.99)[-0.994,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.96)[-0.961,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 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: Mon, 11 Mar 2019 13:33:04 -0000 Author: lidl Date: Mon Mar 11 13:33:03 2019 New Revision: 345005 URL: https://svnweb.freebsd.org/changeset/base/345005 Log: Remove an unneeded 'tail -n 1' from a pipeline When piping to awk, it's almost always an anti-pattern to use 'grep' first. When not in a pipeline, sometimes it is faster to use tail, as awk must process all the lines in the input stream, and won't 'seek'. In a pipeline, both grep and awk must process all lines, so we might as well skip the extra process creation for tail and just use awk for all the processing. Reviewed by: jilles MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D19441 Modified: head/libexec/rc/rc.d/growfs Modified: head/libexec/rc/rc.d/growfs ============================================================================== --- head/libexec/rc/rc.d/growfs Mon Mar 11 10:42:09 2019 (r345004) +++ head/libexec/rc/rc.d/growfs Mon Mar 11 13:33:03 2019 (r345005) @@ -57,7 +57,7 @@ growfs_start () ;; zfs) pool=${FSDEV%%/*} - rootdev=$(zpool list -v $pool | tail -n 1 | awk '{ print $1 }') + rootdev=$(zpool list -v $pool | awk 'END { print $1 }') ;; *) echo "Don't know how to grow root filesystem type: $FSTYPE"