| 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 | |