138451Smsmith/* $NetBSD: write.c,v 1.7 1996/06/21 20:29:30 pk Exp $ */ 238451Smsmith 338451Smsmith/*- 438451Smsmith * Copyright (c) 1993 538451Smsmith * The Regents of the University of California. All rights reserved. 638451Smsmith * 738451Smsmith * This code is derived from software contributed to Berkeley by 838451Smsmith * The Mach Operating System project at Carnegie-Mellon University. 938451Smsmith * 1038451Smsmith * Redistribution and use in source and binary forms, with or without 1138451Smsmith * modification, are permitted provided that the following conditions 1238451Smsmith * are met: 1338451Smsmith * 1. Redistributions of source code must retain the above copyright 1438451Smsmith * notice, this list of conditions and the following disclaimer. 1538451Smsmith * 2. Redistributions in binary form must reproduce the above copyright 1638451Smsmith * notice, this list of conditions and the following disclaimer in the 1738451Smsmith * documentation and/or other materials provided with the distribution. 1838451Smsmith * 4. Neither the name of the University nor the names of its contributors 1938451Smsmith * may be used to endorse or promote products derived from this software 2038451Smsmith * without specific prior written permission. 2138451Smsmith * 2238451Smsmith * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2338451Smsmith * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2438451Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2538451Smsmith * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2638451Smsmith * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2738451Smsmith * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2838451Smsmith * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2938451Smsmith * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3038451Smsmith * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3138451Smsmith * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3238451Smsmith * SUCH DAMAGE. 3338451Smsmith * 3438451Smsmith * @(#)write.c 8.1 (Berkeley) 6/11/93 3538451Smsmith * 3638451Smsmith * 3738451Smsmith * Copyright (c) 1989, 1990, 1991 Carnegie Mellon University 3838451Smsmith * All Rights Reserved. 3938451Smsmith * 4038451Smsmith * Author: Alessandro Forin 4138451Smsmith * 4238451Smsmith * Permission to use, copy, modify and distribute this software and its 4338451Smsmith * documentation is hereby granted, provided that both the copyright 4438451Smsmith * notice and this permission notice appear in all copies of the 4538451Smsmith * software, derivative works or modified versions, and any portions 4638451Smsmith * thereof, and that both notices appear in supporting documentation. 4738451Smsmith * 4838451Smsmith * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 4938451Smsmith * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 5038451Smsmith * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 5138451Smsmith * 5238451Smsmith * Carnegie Mellon requests users of this software to return to 5338451Smsmith * 5438451Smsmith * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 5538451Smsmith * School of Computer Science 5638451Smsmith * Carnegie Mellon University 5738451Smsmith * Pittsburgh PA 15213-3890 5838451Smsmith * 5938451Smsmith * any improvements or extensions that they make and grant Carnegie the 6038451Smsmith * rights to redistribute these changes. 6138451Smsmith */ 6238451Smsmith 6384221Sdillon#include <sys/cdefs.h> 6484221Sdillon__FBSDID("$FreeBSD$"); 6584221Sdillon 6638451Smsmith#include <sys/param.h> 6738451Smsmith#include "stand.h" 6838451Smsmith 6938451Smsmithssize_t 7038451Smsmithwrite(fd, dest, bcount) 7138451Smsmith int fd; 7238451Smsmith void *dest; 7338451Smsmith size_t bcount; 7438451Smsmith{ 7592913Sobrien struct open_file *f = &files[fd]; 7638451Smsmith size_t resid; 7738451Smsmith 7838451Smsmith if ((unsigned)fd >= SOPEN_MAX || !(f->f_flags & F_WRITE)) { 7938451Smsmith errno = EBADF; 8038451Smsmith return (-1); 8138451Smsmith } 8238451Smsmith if (f->f_flags & F_RAW) { 8338451Smsmith twiddle(); 8438451Smsmith errno = (f->f_dev->dv_strategy)(f->f_devdata, F_WRITE, 8538451Smsmith btodb(f->f_offset), bcount, dest, &resid); 8638451Smsmith if (errno) 8738451Smsmith return (-1); 8887114Salfred f->f_offset += resid; 8987114Salfred return (resid); 9038451Smsmith } 9138451Smsmith resid = bcount; 9238451Smsmith if ((errno = (f->f_ops->fo_write)(f, dest, bcount, &resid))) 9338451Smsmith return (-1); 9487111Salfred return (bcount - resid); 9538451Smsmith} 96