| /* Work around a bug of lstat on some systems |
| |
| Copyright (C) 1997-1999, 2000-2006, 2008 Free Software Foundation, Inc. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| /* written by Jim Meyering */ |
| |
| #include <config.h> |
| |
| /* Get the original definition of open. It might be defined as a macro. */ |
| #define __need_system_sys_stat_h |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #undef __need_system_sys_stat_h |
| |
| static inline int |
| orig_lstat (const char *filename, struct stat *buf) |
| { |
| return lstat (filename, buf); |
| } |
| |
| /* Specification. */ |
| #include <sys/stat.h> |
| |
| #include <string.h> |
| #include <errno.h> |
| |
| /* lstat works differently on Linux and Solaris systems. POSIX (see |
| `pathname resolution' in the glossary) requires that programs like |
| `ls' take into consideration the fact that FILE has a trailing slash |
| when FILE is a symbolic link. On Linux and Solaris 10 systems, the |
| lstat function already has the desired semantics (in treating |
| `lstat ("symlink/", sbuf)' just like `lstat ("symlink/.", sbuf)', |
| but on Solaris 9 and earlier it does not. |
| |
| If FILE has a trailing slash and specifies a symbolic link, |
| then use stat() to get more info on the referent of FILE. |
| If the referent is a non-directory, then set errno to ENOTDIR |
| and return -1. Otherwise, return stat's result. */ |
| |
| int |
| rpl_lstat (const char *file, struct stat *sbuf) |
| { |
| size_t len; |
| int lstat_result = orig_lstat (file, sbuf); |
| |
| if (lstat_result != 0 || !S_ISLNK (sbuf->st_mode)) |
| return lstat_result; |
| |
| len = strlen (file); |
| if (len == 0 || file[len - 1] != '/') |
| return 0; |
| |
| /* FILE refers to a symbolic link and the name ends with a slash. |
| Call stat() to get info about the link's referent. */ |
| |
| /* If stat fails, then we do the same. */ |
| if (stat (file, sbuf) != 0) |
| return -1; |
| |
| /* If FILE references a directory, return 0. */ |
| if (S_ISDIR (sbuf->st_mode)) |
| return 0; |
| |
| /* Here, we know stat succeeded and FILE references a non-directory. |
| But it was specified via a name including a trailing slash. |
| Fail with errno set to ENOTDIR to indicate the contradiction. */ |
| errno = ENOTDIR; |
| return -1; |
| } |