From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff King Subject: [PATCH 07/17] prefer mkpathdup to mkpath in assignments Date: Mon, 10 Aug 2015 05:35:38 -0400 Message-ID: <20150810093538.GG30981@sigill.intra.peff.net> References: <20150810092731.GA9027@sigill.intra.peff.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Cc: Michael Haggerty To: git@vger.kernel.org X-From: git-owner@vger.kernel.org Mon Aug 10 11:35:49 2015 Return-path: Envelope-to: gcvg-git-2@plane.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZOjUi-0004Lm-G6 for gcvg-git-2@plane.gmane.org; Mon, 10 Aug 2015 11:35:48 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753558AbbHJJfo (ORCPT ); Mon, 10 Aug 2015 05:35:44 -0400 Received: from cloud.peff.net ([50.56.180.127]:42828 "HELO cloud.peff.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753302AbbHJJfn (ORCPT ); Mon, 10 Aug 2015 05:35:43 -0400 Received: (qmail 30917 invoked by uid 102); 10 Aug 2015 09:35:43 -0000 Received: from Unknown (HELO peff.net) (10.0.1.1) by cloud.peff.net (qpsmtpd/0.84) with SMTP; Mon, 10 Aug 2015 04:35:43 -0500 Received: (qmail 3135 invoked by uid 107); 10 Aug 2015 09:35:54 -0000 Received: from sigill.intra.peff.net (HELO sigill.intra.peff.net) (10.0.0.7) by peff.net (qpsmtpd/0.84) with SMTP; Mon, 10 Aug 2015 05:35:54 -0400 Received: by sigill.intra.peff.net (sSMTP sendmail emulation); Mon, 10 Aug 2015 05:35:38 -0400 Content-Disposition: inline In-Reply-To: <20150810092731.GA9027@sigill.intra.peff.net> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: As with the previous commit to git_path, assigning the result of mkpath is suspicious, since it is not clear whether we will still depend on the value after it may have been overwritten by subsequent calls. This patch converts low-hanging fruit to use mkpathdup instead of mkpath (with the downside that we must remember to free the result). Signed-off-by: Jeff King --- builtin/repack.c | 24 +++++++++++++----------- refs.c | 6 ++++-- 2 files changed, 17 insertions(+), 13 deletions(-) diff --git a/builtin/repack.c b/builtin/repack.c index af7340c..70b9b1e 100644 --- a/builtin/repack.c +++ b/builtin/repack.c @@ -285,8 +285,7 @@ int cmd_repack(int argc, const char **argv, const char *prefix) failed = 0; for_each_string_list_item(item, &names) { for (ext = 0; ext < ARRAY_SIZE(exts); ext++) { - const char *fname_old; - char *fname; + char *fname, *fname_old; fname = mkpathdup("%s/pack-%s%s", packdir, item->string, exts[ext].name); if (!file_exists(fname)) { @@ -294,7 +293,7 @@ int cmd_repack(int argc, const char **argv, const char *prefix) continue; } - fname_old = mkpath("%s/old-%s%s", packdir, + fname_old = mkpathdup("%s/old-%s%s", packdir, item->string, exts[ext].name); if (file_exists(fname_old)) if (unlink(fname_old)) @@ -302,10 +301,12 @@ int cmd_repack(int argc, const char **argv, const char *prefix) if (!failed && rename(fname, fname_old)) { free(fname); + free(fname_old); failed = 1; break; } else { string_list_append(&rollback, fname); + free(fname_old); } } if (failed) @@ -314,13 +315,13 @@ int cmd_repack(int argc, const char **argv, const char *prefix) if (failed) { struct string_list rollback_failure = STRING_LIST_INIT_DUP; for_each_string_list_item(item, &rollback) { - const char *fname_old; - char *fname; + char *fname, *fname_old; fname = mkpathdup("%s/%s", packdir, item->string); - fname_old = mkpath("%s/old-%s", packdir, item->string); + fname_old = mkpathdup("%s/old-%s", packdir, item->string); if (rename(fname_old, fname)) string_list_append(&rollback_failure, fname); free(fname); + free(fname_old); } if (rollback_failure.nr) { @@ -368,13 +369,14 @@ int cmd_repack(int argc, const char **argv, const char *prefix) /* Remove the "old-" files */ for_each_string_list_item(item, &names) { for (ext = 0; ext < ARRAY_SIZE(exts); ext++) { - const char *fname; - fname = mkpath("%s/old-%s%s", - packdir, - item->string, - exts[ext].name); + char *fname; + fname = mkpathdup("%s/old-%s%s", + packdir, + item->string, + exts[ext].name); if (remove_path(fname)) warning(_("removing '%s' failed"), fname); + free(fname); } } diff --git a/refs.c b/refs.c index 93b250e..e70941a 100644 --- a/refs.c +++ b/refs.c @@ -3380,7 +3380,7 @@ static int commit_ref_update(struct ref_lock *lock, int create_symref(const char *ref_target, const char *refs_heads_master, const char *logmsg) { - const char *lockpath; + char *lockpath = NULL; char ref[1000]; int fd, len, written; char *git_HEAD = git_pathdup("%s", ref_target); @@ -3407,7 +3407,7 @@ int create_symref(const char *ref_target, const char *refs_heads_master, error("refname too long: %s", refs_heads_master); goto error_free_return; } - lockpath = mkpath("%s.lock", git_HEAD); + lockpath = mkpathdup("%s.lock", git_HEAD); fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666); if (fd < 0) { error("Unable to open %s for writing", lockpath); @@ -3427,9 +3427,11 @@ int create_symref(const char *ref_target, const char *refs_heads_master, error_unlink_return: unlink_or_warn(lockpath); error_free_return: + free(lockpath); free(git_HEAD); return -1; } + free(lockpath); #ifndef NO_SYMLINK_HEAD done: -- 2.5.0.414.g670f2a4