lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Copyright (C) 1995-2015 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <sys/ipc.h> |
| 20 | #include <sys/stat.h> |
| 21 | |
| 22 | key_t |
| 23 | ftok (pathname, proj_id) |
| 24 | const char *pathname; |
| 25 | int proj_id; |
| 26 | { |
| 27 | struct stat64 st; |
| 28 | key_t key; |
| 29 | |
| 30 | if (__xstat64 (_STAT_VER, pathname, &st) < 0) |
| 31 | return (key_t) -1; |
| 32 | |
| 33 | key = ((st.st_ino & 0xffff) | ((st.st_dev & 0xff) << 16) |
| 34 | | ((proj_id & 0xff) << 24)); |
| 35 | |
| 36 | return key; |
| 37 | } |