1*479ab7f0SSascha Wildner /* $NetBSD: write.c,v 1.7 1996/06/21 20:29:30 pk Exp $ */
2*479ab7f0SSascha Wildner /* $DragonFly: src/lib/libstand/write.c,v 1.3 2005/12/11 02:27:26 swildner Exp $ */
3*479ab7f0SSascha Wildner
4*479ab7f0SSascha Wildner /*-
5*479ab7f0SSascha Wildner * Copyright (c) 1993
6*479ab7f0SSascha Wildner * The Regents of the University of California. All rights reserved.
7*479ab7f0SSascha Wildner *
8*479ab7f0SSascha Wildner * This code is derived from software contributed to Berkeley by
9*479ab7f0SSascha Wildner * The Mach Operating System project at Carnegie-Mellon University.
10*479ab7f0SSascha Wildner *
11*479ab7f0SSascha Wildner * Redistribution and use in source and binary forms, with or without
12*479ab7f0SSascha Wildner * modification, are permitted provided that the following conditions
13*479ab7f0SSascha Wildner * are met:
14*479ab7f0SSascha Wildner * 1. Redistributions of source code must retain the above copyright
15*479ab7f0SSascha Wildner * notice, this list of conditions and the following disclaimer.
16*479ab7f0SSascha Wildner * 2. Redistributions in binary form must reproduce the above copyright
17*479ab7f0SSascha Wildner * notice, this list of conditions and the following disclaimer in the
18*479ab7f0SSascha Wildner * documentation and/or other materials provided with the distribution.
19*479ab7f0SSascha Wildner * 3. Neither the name of the University nor the names of its contributors
20*479ab7f0SSascha Wildner * may be used to endorse or promote products derived from this software
21*479ab7f0SSascha Wildner * without specific prior written permission.
22*479ab7f0SSascha Wildner *
23*479ab7f0SSascha Wildner * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24*479ab7f0SSascha Wildner * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25*479ab7f0SSascha Wildner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26*479ab7f0SSascha Wildner * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27*479ab7f0SSascha Wildner * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28*479ab7f0SSascha Wildner * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29*479ab7f0SSascha Wildner * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30*479ab7f0SSascha Wildner * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31*479ab7f0SSascha Wildner * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32*479ab7f0SSascha Wildner * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33*479ab7f0SSascha Wildner * SUCH DAMAGE.
34*479ab7f0SSascha Wildner *
35*479ab7f0SSascha Wildner * @(#)write.c 8.1 (Berkeley) 6/11/93
36*479ab7f0SSascha Wildner *
37*479ab7f0SSascha Wildner *
38*479ab7f0SSascha Wildner * Copyright (c) 1989, 1990, 1991 Carnegie Mellon University
39*479ab7f0SSascha Wildner * All Rights Reserved.
40*479ab7f0SSascha Wildner *
41*479ab7f0SSascha Wildner * Author: Alessandro Forin
42*479ab7f0SSascha Wildner *
43*479ab7f0SSascha Wildner * Permission to use, copy, modify and distribute this software and its
44*479ab7f0SSascha Wildner * documentation is hereby granted, provided that both the copyright
45*479ab7f0SSascha Wildner * notice and this permission notice appear in all copies of the
46*479ab7f0SSascha Wildner * software, derivative works or modified versions, and any portions
47*479ab7f0SSascha Wildner * thereof, and that both notices appear in supporting documentation.
48*479ab7f0SSascha Wildner *
49*479ab7f0SSascha Wildner * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
50*479ab7f0SSascha Wildner * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
51*479ab7f0SSascha Wildner * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
52*479ab7f0SSascha Wildner *
53*479ab7f0SSascha Wildner * Carnegie Mellon requests users of this software to return to
54*479ab7f0SSascha Wildner *
55*479ab7f0SSascha Wildner * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
56*479ab7f0SSascha Wildner * School of Computer Science
57*479ab7f0SSascha Wildner * Carnegie Mellon University
58*479ab7f0SSascha Wildner * Pittsburgh PA 15213-3890
59*479ab7f0SSascha Wildner *
60*479ab7f0SSascha Wildner * any improvements or extensions that they make and grant Carnegie the
61*479ab7f0SSascha Wildner * rights to redistribute these changes.
62*479ab7f0SSascha Wildner */
63*479ab7f0SSascha Wildner
64*479ab7f0SSascha Wildner #include <sys/param.h>
65*479ab7f0SSascha Wildner #include "stand.h"
66*479ab7f0SSascha Wildner
67*479ab7f0SSascha Wildner ssize_t
write(int fd,void * dest,size_t bcount)68*479ab7f0SSascha Wildner write(int fd, void *dest, size_t bcount)
69*479ab7f0SSascha Wildner {
70*479ab7f0SSascha Wildner struct open_file *f = &files[fd];
71*479ab7f0SSascha Wildner size_t resid;
72*479ab7f0SSascha Wildner
73*479ab7f0SSascha Wildner if ((unsigned)fd >= SOPEN_MAX || !(f->f_flags & F_WRITE)) {
74*479ab7f0SSascha Wildner errno = EBADF;
75*479ab7f0SSascha Wildner return (-1);
76*479ab7f0SSascha Wildner }
77*479ab7f0SSascha Wildner if (f->f_flags & F_RAW) {
78*479ab7f0SSascha Wildner twiddle();
79*479ab7f0SSascha Wildner errno = (f->f_dev->dv_strategy)(f->f_devdata, F_WRITE,
80*479ab7f0SSascha Wildner btodb(f->f_offset), bcount, dest, &resid);
81*479ab7f0SSascha Wildner if (errno)
82*479ab7f0SSascha Wildner return (-1);
83*479ab7f0SSascha Wildner f->f_offset += resid;
84*479ab7f0SSascha Wildner return (resid);
85*479ab7f0SSascha Wildner }
86*479ab7f0SSascha Wildner resid = bcount;
87*479ab7f0SSascha Wildner if ((errno = (f->f_ops->fo_write)(f, dest, bcount, &resid)))
88*479ab7f0SSascha Wildner return (-1);
89*479ab7f0SSascha Wildner return (0);
90*479ab7f0SSascha Wildner }
91