projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| e9ce8d39 A |
1 | /* |
| 2 | * Copyright (c) 1994 SigmaSoft, Th. Lockert <tholo@sigmasoft.com> | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * 3. The name of the author may not be used to endorse or promote products | |
| 14 | * derived from this software without specific prior written permission. | |
| 15 | * | |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
| 17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
| 18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
| 19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 20 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 21 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
| 22 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
| 23 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
| 24 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
| 25 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 | */ | |
| 27 | ||
| 9385eb3d | 28 | #include <sys/cdefs.h> |
| 3d9156a7 | 29 | __FBSDID("$FreeBSD: src/lib/libc/gen/ftok.c,v 1.7 2004/06/01 06:53:07 tjr Exp $"); |
| e9ce8d39 A |
30 | |
| 31 | #include <sys/types.h> | |
| 32 | #include <sys/stat.h> | |
| 33 | #include <sys/ipc.h> | |
| 34 | ||
| 35 | key_t | |
| 36 | ftok(path, id) | |
| 37 | const char *path; | |
| 3d9156a7 | 38 | int id; |
| e9ce8d39 A |
39 | { |
| 40 | struct stat st; | |
| 41 | ||
| 42 | if (stat(path, &st) < 0) | |
| 43 | return (key_t)-1; | |
| 44 | ||
| 9385eb3d | 45 | return (key_t) (id << 24 | (st.st_dev & 0xff) << 16 | (st.st_ino & 0xffff)); |
| e9ce8d39 | 46 | } |