From owner-svn-src-head@freebsd.org Sun Jan 26 10:51:57 2020 Return-Path: Delivered-To: svn-src-head@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 A13F8238DCE; Sun, 26 Jan 2020 10:51:57 +0000 (UTC) (envelope-from pjd@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 4858p53tdkz3MwR; Sun, 26 Jan 2020 10:51:57 +0000 (UTC) (envelope-from pjd@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 80B1B1FF7F; Sun, 26 Jan 2020 10:51:57 +0000 (UTC) (envelope-from pjd@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 00QApvvD068816; Sun, 26 Jan 2020 10:51:57 GMT (envelope-from pjd@FreeBSD.org) Received: (from pjd@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 00QApvvg068815; Sun, 26 Jan 2020 10:51:57 GMT (envelope-from pjd@FreeBSD.org) Message-Id: <202001261051.00QApvvg068815@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: pjd set sender to pjd@FreeBSD.org using -f From: Pawel Jakub Dawidek Date: Sun, 26 Jan 2020 10:51:57 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r357139 - head/bin/pwait X-SVN-Group: head X-SVN-Commit-Author: pjd X-SVN-Commit-Paths: head/bin/pwait X-SVN-Commit-Revision: 357139 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 26 Jan 2020 10:51:57 -0000 Author: pjd Date: Sun Jan 26 10:51:57 2020 New Revision: 357139 URL: https://svnweb.freebsd.org/changeset/base/357139 Log: Check for duplicated PID without using additional variable. Sponsored by: Fudo Security Modified: head/bin/pwait/pwait.c Modified: head/bin/pwait/pwait.c ============================================================================== --- head/bin/pwait/pwait.c Sun Jan 26 10:49:24 2020 (r357138) +++ head/bin/pwait/pwait.c Sun Jan 26 10:51:57 2020 (r357139) @@ -66,7 +66,7 @@ main(int argc, char *argv[]) int kq; struct kevent *e; int tflag, verbose; - int opt, nleft, n, i, duplicate, status; + int opt, nleft, n, i, status; long pid; char *s, *end; double timeout; @@ -135,18 +135,19 @@ main(int argc, char *argv[]) warnx("%s: bad process id", s); continue; } - duplicate = 0; - for (i = 0; i < nleft; i++) + for (i = 0; i < nleft; i++) { if (e[i].ident == (uintptr_t)pid) - duplicate = 1; - if (!duplicate) { - EV_SET(e + nleft, pid, EVFILT_PROC, EV_ADD, NOTE_EXIT, - 0, NULL); - if (kevent(kq, e + nleft, 1, NULL, 0, NULL) == -1) - warn("%ld", pid); - else - nleft++; + break; } + if (i < nleft) { + /* Duplicate. */ + continue; + } + EV_SET(e + nleft, pid, EVFILT_PROC, EV_ADD, NOTE_EXIT, 0, NULL); + if (kevent(kq, e + nleft, 1, NULL, 0, NULL) == -1) + warn("%ld", pid); + else + nleft++; } if (tflag) {