1 /* $NetBSD: procfs_fd.c,v 1.12 2007/11/07 00:23:37 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: procfs_fd.c,v 1.12 2007/11/07 00:23:37 ad Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/time.h> 45 #include <sys/kernel.h> 46 #include <sys/proc.h> 47 #include <sys/vnode.h> 48 #include <sys/file.h> 49 #include <sys/filedesc.h> 50 #include <miscfs/procfs/procfs.h> 51 52 int 53 procfs_dofd( 54 struct lwp *curl, 55 struct proc *p, 56 struct pfsnode *pfs, 57 struct uio *uio 58 ) 59 { 60 int error; 61 struct file *fp; 62 off_t offs; 63 64 fp = fd_getfile(p->p_fd, pfs->pfs_fd); 65 if (fp == NULL) 66 return (EBADF); 67 68 FILE_USE(fp); 69 70 offs = fp->f_offset; 71 72 switch (uio->uio_rw) { 73 case UIO_READ: 74 error = (*fp->f_ops->fo_read)(fp, &offs, uio, curl->l_cred, 0); 75 break; 76 case UIO_WRITE: 77 error = (*fp->f_ops->fo_write)(fp, &offs, uio, curl->l_cred,0); 78 break; 79 default: 80 panic("bad uio op"); 81 } 82 83 FILE_UNUSE(fp, curl); 84 85 return (error); 86 } 87