1/*	$NetBSD: procfs_fd.c,v 1.13 2008/03/21 21:55:00 ad Exp $	*/
2
3/*-
4 * Copyright (c) 2003, 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: procfs_fd.c,v 1.13 2008/03/21 21:55:00 ad Exp $");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/time.h>
38#include <sys/kernel.h>
39#include <sys/proc.h>
40#include <sys/vnode.h>
41#include <sys/file.h>
42#include <sys/filedesc.h>
43
44#include <miscfs/procfs/procfs.h>
45
46int
47procfs_dofd(lwp_t *curl, proc_t *p, struct pfsnode *pfs, struct uio *uio)
48{
49	int error;
50	file_t *fp;
51	off_t offs;
52
53	if ((fp = fd_getfile2(p, pfs->pfs_fd)) == NULL)
54		return EBADF;
55
56	offs = fp->f_offset;
57
58	switch (uio->uio_rw) {
59	case UIO_READ:
60		error = (*fp->f_ops->fo_read)(fp, &offs, uio, curl->l_cred, 0);
61		break;
62	case UIO_WRITE:
63		error = (*fp->f_ops->fo_write)(fp, &offs, uio, curl->l_cred, 0);
64		break;
65	default:
66		panic("bad uio op");
67	}
68
69	closef(fp);
70
71	return (error);
72}
73