nullfs.c revision 59766 
1/* $FreeBSD: head/lib/libstand/nullfs.c 59766 2000-04-29 20:47:10Z jlemon $ */
2/*	$NetBSD: nullfs.c,v 1.1 1996/01/13 22:25:39 leo Exp $	*/
3
4/*-
5 * Copyright (c) 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * The Mach Operating System project at Carnegie-Mellon University.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 *    must display the following acknowledgement:
21 *	This product includes software developed by the University of
22 *	California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 *    may be used to endorse or promote products derived from this software
25 *    without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 *	@(#)open.c	8.1 (Berkeley) 6/11/93
40 *
41 *
42 * Copyright (c) 1989, 1990, 1991 Carnegie Mellon University
43 * All Rights Reserved.
44 *
45 * Author: Alessandro Forin
46 *
47 * Permission to use, copy, modify and distribute this software and its
48 * documentation is hereby granted, provided that both the copyright
49 * notice and this permission notice appear in all copies of the
50 * software, derivative works or modified versions, and any portions
51 * thereof, and that both notices appear in supporting documentation.
52 *
53 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
54 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
55 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
56 *
57 * Carnegie Mellon requests users of this software to return to
58 *
59 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
60 *  School of Computer Science
61 *  Carnegie Mellon University
62 *  Pittsburgh PA 15213-3890
63 *
64 * any improvements or extensions that they make and grant Carnegie the
65 * rights to redistribute these changes.
66 */
67
68#include "stand.h"
69
70/*
71 * Null filesystem
72 */
73int	null_open (const char *path, struct open_file *f)
74{
75	errno  = EIO;
76	return -1;
77}
78
79int	null_close(struct open_file *f)
80{
81	return 0;
82}
83
84int	null_read (struct open_file *f, void *buf, size_t size, size_t *resid)
85{
86	errno = EIO;
87	return -1;
88}
89
90int	null_write (struct open_file *f, void *buf, size_t size, size_t *resid)
91{
92	errno = EIO;
93	return -1;
94}
95
96off_t	null_seek (struct open_file *f, off_t offset, int where)
97{
98	errno = EIO;
99	return -1;
100}
101
102int	null_stat (struct open_file *f, struct stat *sb)
103{
104	errno = EIO;
105	return -1;
106}
107
108int	null_readdir(struct open_file *f, struct dirent *d)
109{
110	errno = EIO;
111	return -1;
112}
113