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36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/* Copyright (C) 1995-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sys/ipc.h>
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#include <sys/stat.h>
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key_t
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ftok (const char *pathname, int proj_id)
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{
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struct stat64 st;
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key_t key;
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if (__xstat64 (_STAT_VER, pathname, &st) < 0)
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return (key_t) -1;
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key = ((st.st_ino & 0xffff) | ((st.st_dev & 0xff) << 16)
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| ((proj_id & 0xff) << 24));
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return key;
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}
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