1 | /* $NetBSD: procfs_fd.c,v 1.14 2008/04/28 20:24:08 martin 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 1.14 2008/04/28 20:24:08 martin 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 | |
46 | int |
47 | procfs_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 | |