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75cd5204 | 1 | /* Copyright (C) 1995, 1996 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. | |
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5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
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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 | |
13 | Library General Public License for more details. | |
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15 | You should have received a copy of the GNU Library General Public |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
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19 | |
20 | #include <sys/ipc.h> | |
21 | #include <sys/stat.h> | |
22 | ||
23 | key_t | |
24 | ftok (pathname, proj_id) | |
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25 | const char *pathname; |
26 | int proj_id; | |
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27 | { |
28 | struct stat st; | |
29 | key_t key; | |
30 | ||
31 | if (__stat (pathname, &st) < 0) | |
32 | return (key_t) -1; | |
33 | ||
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34 | key = ((st.st_ino & 0xffff) | ((st.st_dev & 0xff) << 16) |
35 | | ((proj_id & 0xff) << 24)); | |
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36 | |
37 | return key; | |
38 | } |