Retro68/gcc/newlib/libc/sys/linux/ftok.c

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2017-04-11 21:13:36 +00:00
/* Copyright (C) 1995, 1996, 2000 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. */
/* Modified for newlib by Jeff Johnston, June 10/2002 */
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/stat.h>
#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 2
#define STAT stat64
#else
#define STAT stat
#endif
key_t
ftok (pathname, proj_id)
const char *pathname;
int proj_id;
{
struct STAT st;
key_t key;
if (STAT (pathname, &st) < 0)
return (key_t) -1;
key = ((st.st_ino & 0xffff) | ((st.st_dev & 0xff) << 16)
| ((proj_id & 0xff) << 24));
return key;
}