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