From owner-svn-src-all@freebsd.org Mon May 29 12:59:26 2017 Return-Path: Delivered-To: svn-src-all@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 3968CCFE7AE; Mon, 29 May 2017 12:59:26 +0000 (UTC) (envelope-from kib@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 1587E789DA; Mon, 29 May 2017 12:59:26 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id v4TCxPkf093722; Mon, 29 May 2017 12:59:25 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id v4TCxPcX093721; Mon, 29 May 2017 12:59:25 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201705291259.v4TCxPcX093721@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Mon, 29 May 2017 12:59:25 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r319130 - stable/10/lib/libc/stdlib X-SVN-Group: stable-10 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: 2.1.23 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, 29 May 2017 12:59:26 -0000 Author: kib Date: Mon May 29 12:59:24 2017 New Revision: 319130 URL: https://svnweb.freebsd.org/changeset/base/319130 Log: MFC r318299: Simplify cleanup on failure in realpath(3). Modified: stable/10/lib/libc/stdlib/realpath.c Directory Properties: stable/10/ (props changed) Modified: stable/10/lib/libc/stdlib/realpath.c ============================================================================== --- stable/10/lib/libc/stdlib/realpath.c Mon May 29 12:58:30 2017 (r319129) +++ stable/10/lib/libc/stdlib/realpath.c Mon May 29 12:59:24 2017 (r319130) @@ -47,32 +47,16 @@ __FBSDID("$FreeBSD$"); * components. Returns (resolved) on success, or (NULL) on failure, * in which case the path which caused trouble is left in (resolved). */ -char * -realpath(const char * __restrict path, char * __restrict resolved) +static char * +realpath1(const char *path, char *resolved) { struct stat sb; char *p, *q; size_t left_len, resolved_len, next_token_len; unsigned symlinks; - int m; ssize_t slen; char left[PATH_MAX], next_token[PATH_MAX], symlink[PATH_MAX]; - if (path == NULL) { - errno = EINVAL; - return (NULL); - } - if (path[0] == '\0') { - errno = ENOENT; - return (NULL); - } - if (resolved == NULL) { - resolved = malloc(PATH_MAX); - if (resolved == NULL) - return (NULL); - m = 1; - } else - m = 0; symlinks = 0; if (path[0] == '/') { resolved[0] = '/'; @@ -83,20 +67,14 @@ realpath(const char * __restrict path, c left_len = strlcpy(left, path + 1, sizeof(left)); } else { if (getcwd(resolved, PATH_MAX) == NULL) { - if (m) - free(resolved); - else { - resolved[0] = '.'; - resolved[1] = '\0'; - } + resolved[0] = '.'; + resolved[1] = '\0'; return (NULL); } resolved_len = strlen(resolved); left_len = strlcpy(left, path, sizeof(left)); } if (left_len >= sizeof(left) || resolved_len >= PATH_MAX) { - if (m) - free(resolved); errno = ENAMETOOLONG; return (NULL); } @@ -125,8 +103,6 @@ realpath(const char * __restrict path, c if (resolved[resolved_len - 1] != '/') { if (resolved_len + 1 >= PATH_MAX) { - if (m) - free(resolved); errno = ENAMETOOLONG; return (NULL); } @@ -158,27 +134,18 @@ realpath(const char * __restrict path, c */ resolved_len = strlcat(resolved, next_token, PATH_MAX); if (resolved_len >= PATH_MAX) { - if (m) - free(resolved); errno = ENAMETOOLONG; return (NULL); } - if (lstat(resolved, &sb) != 0) { - if (m) - free(resolved); + if (lstat(resolved, &sb) != 0) return (NULL); - } if (S_ISLNK(sb.st_mode)) { if (symlinks++ > MAXSYMLINKS) { - if (m) - free(resolved); errno = ELOOP; return (NULL); } slen = readlink(resolved, symlink, sizeof(symlink)); if (slen <= 0 || slen >= sizeof(symlink)) { - if (m) - free(resolved); if (slen < 0) { /* keep errno from readlink(2) call */ } else if (slen == 0) { @@ -207,8 +174,6 @@ realpath(const char * __restrict path, c if (p != NULL) { if (symlink[slen - 1] != '/') { if (slen + 1 >= sizeof(symlink)) { - if (m) - free(resolved); errno = ENAMETOOLONG; return (NULL); } @@ -218,16 +183,12 @@ realpath(const char * __restrict path, c left_len = strlcat(symlink, left, sizeof(symlink)); if (left_len >= sizeof(symlink)) { - if (m) - free(resolved); errno = ENAMETOOLONG; return (NULL); } } left_len = strlcpy(left, symlink, sizeof(left)); } else if (!S_ISDIR(sb.st_mode) && p != NULL) { - if (m) - free(resolved); errno = ENOTDIR; return (NULL); } @@ -241,3 +202,29 @@ realpath(const char * __restrict path, c resolved[resolved_len - 1] = '\0'; return (resolved); } + +char * +realpath(const char * __restrict path, char * __restrict resolved) +{ + char *m, *res; + + if (path == NULL) { + errno = EINVAL; + return (NULL); + } + if (path[0] == '\0') { + errno = ENOENT; + return (NULL); + } + if (resolved != NULL) { + m = NULL; + } else { + m = resolved = malloc(PATH_MAX); + if (resolved == NULL) + return (NULL); + } + res = realpath1(path, resolved); + if (res == NULL) + free(m); + return (res); +}