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/* Copyright (C) 1995-2015 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sys/ipc.h>
#include <sys/stat.h>
/* In the Hurd, we use the second-to-most-significant bit as flag for
private keys. We use a different order of the components so that
the biggest one---the inode number---is affected by this. */
key_t
ftok (pathname, proj_id)
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_dev & 0xff) | ((proj_id & 0xff) << 8)
| ((st.st_ino & 0x3fff) << 16));
return key;
}
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