blob: cec243868a7f57b2a1f016d0998d2b75a706c7cd [file] [log] [blame]
lh9ed821d2023-04-07 01:36:19 -07001/* Copyright (C) 1995, 1996 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
4
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.
9
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.
14
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. */
19
20#include <sys/ipc.h>
21#include <sys/stat.h>
22#ifdef __UCLIBC_HAS_LFS__
23# include <_lfs_64.h>
24#else
25# define stat64 stat
26#endif
27
28key_t ftok (const char *pathname, int proj_id)
29{
30 struct stat64 st;
31 key_t key;
32
33 if (stat64(pathname, &st) < 0)
34 return (key_t) -1;
35
36 key = ((st.st_ino & 0xffff) | ((st.st_dev & 0xff) << 16)
37 | ((proj_id & 0xff) << 24));
38
39 return key;
40}