| /* Copyright (C) 1995-2016 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995. |
| |
| 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 <sys/ipc.h> |
| #include <sys/stat.h> |
| |
| key_t |
| ftok (const char *pathname, int proj_id) |
| { |
| struct stat64 st; |
| key_t key; |
| |
| if (__xstat64 (_STAT_VER, pathname, &st) < 0) |
| return (key_t) -1; |
| |
| key = ((st.st_ino & 0xffff) | ((st.st_dev & 0xff) << 16) |
| | ((proj_id & 0xff) << 24)); |
| |
| return key; |
| } |