| /* File identity for the dynamic linker. Generic POSIX.1 version. |
| Copyright (C) 2015-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <stdbool.h> |
| #include <sys/stat.h> |
| |
| /* For POSIX.1 systems, the pair of st_dev and st_ino constitute |
| a unique identifier for a file. */ |
| struct r_file_id |
| { |
| dev_t dev; |
| ino64_t ino; |
| }; |
| |
| /* Sample FD to fill in *ID. Returns true on success. |
| On error, returns false, with errno set. */ |
| static inline bool |
| _dl_get_file_id (int fd, struct r_file_id *id) |
| { |
| struct stat64 st; |
| |
| if (__glibc_unlikely (__fxstat64 (_STAT_VER, fd, &st) < 0)) |
| return false; |
| |
| id->dev = st.st_dev; |
| id->ino = st.st_ino; |
| return true; |
| } |
| |
| /* Compare two results from _dl_get_file_id for equality. */ |
| static inline bool |
| _dl_file_id_match_p (const struct r_file_id *a, const struct r_file_id *b) |
| { |
| return a->dev == b->dev && a->ino == b->ino; |
| } |