From owner-svn-src-head@freebsd.org Tue Jul 11 18:24:07 2017 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9866CDA977A; Tue, 11 Jul 2017 18:24:07 +0000 (UTC) (envelope-from markj@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 mx1.freebsd.org (Postfix) with ESMTPS id 66F698131B; Tue, 11 Jul 2017 18:24:07 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id v6BIO6Ya020372; Tue, 11 Jul 2017 18:24:06 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id v6BIO6ZM020371; Tue, 11 Jul 2017 18:24:06 GMT (envelope-from markj@FreeBSD.org) Message-Id: <201707111824.v6BIO6ZM020371@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Tue, 11 Jul 2017 18:24:06 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r320896 - head/sbin/savecore X-SVN-Group: head X-SVN-Commit-Author: markj X-SVN-Commit-Paths: head/sbin/savecore X-SVN-Commit-Revision: 320896 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: 2.1.23 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: Tue, 11 Jul 2017 18:24:07 -0000 Author: markj Date: Tue Jul 11 18:24:05 2017 New Revision: 320896 URL: https://svnweb.freebsd.org/changeset/base/320896 Log: Add a subroutine for comparing kerneldump identifiers. MFC after: 2 weeks Modified: head/sbin/savecore/savecore.c Modified: head/sbin/savecore/savecore.c ============================================================================== --- head/sbin/savecore/savecore.c Tue Jul 11 17:59:15 2017 (r320895) +++ head/sbin/savecore/savecore.c Tue Jul 11 18:24:05 2017 (r320896) @@ -334,6 +334,13 @@ check_space(const char *savedir, off_t dumpsize, int b return (1); } +static bool +compare_magic(const struct kerneldumpheader *kdh, const char *magic) +{ + + return (strncmp(kdh->magic, magic, sizeof(kdh->magic)) == 0); +} + #define BLOCKSIZE (1<<12) #define BLOCKMASK (~(BLOCKSIZE-1)) @@ -564,7 +571,7 @@ DoFile(const char *savedir, const char *device) } memcpy(&kdhl, temp, sizeof(kdhl)); istextdump = 0; - if (strncmp(kdhl.magic, TEXTDUMPMAGIC, sizeof kdhl) == 0) { + if (compare_magic(&kdhl, TEXTDUMPMAGIC)) { if (verbose) printf("textdump magic on last dump header on %s\n", device); @@ -578,8 +585,7 @@ DoFile(const char *savedir, const char *device) if (force == 0) goto closefd; } - } else if (memcmp(kdhl.magic, KERNELDUMPMAGIC, sizeof kdhl.magic) == - 0) { + } else if (compare_magic(&kdhl, KERNELDUMPMAGIC)) { if (dtoh32(kdhl.version) != KERNELDUMPVERSION) { syslog(LOG_ERR, "unknown version (%d) in last dump header on %s", @@ -598,8 +604,7 @@ DoFile(const char *savedir, const char *device) if (force == 0) goto closefd; - if (memcmp(kdhl.magic, KERNELDUMPMAGIC_CLEARED, - sizeof kdhl.magic) == 0) { + if (compare_magic(&kdhl, KERNELDUMPMAGIC_CLEARED)) { if (verbose) printf("forcing magic on %s\n", device); memcpy(kdhl.magic, KERNELDUMPMAGIC,