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b168057a | 1 | /* Copyright (C) 1995-2015 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995. | |
60478656 | 4 | |
b5791037 | 5 | The GNU C Library is free software; you can redistribute it and/or |
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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. | |
60478656 | 9 | |
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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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
60478656 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
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16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
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18 | |
19 | #include <sys/ipc.h> | |
20 | #include <sys/stat.h> | |
21 | ||
22 | key_t | |
23 | ftok (pathname, proj_id) | |
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24 | const char *pathname; |
25 | int proj_id; | |
60478656 | 26 | { |
8edf6e0d | 27 | struct stat64 st; |
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28 | key_t key; |
29 | ||
8edf6e0d | 30 | if (__xstat64 (_STAT_VER, pathname, &st) < 0) |
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31 | return (key_t) -1; |
32 | ||
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33 | key = ((st.st_ino & 0xffff) | ((st.st_dev & 0xff) << 16) |
34 | | ((proj_id & 0xff) << 24)); | |
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35 | |
36 | return key; | |
37 | } |