2 * $FreeBSD: src/sys/boot/i386/libi386/pread.c,v 1.2 1999/08/28 00:40:16 peter Exp $
3 * $DragonFly: src/sys/boot/i386/libi386/Attic/pread.c,v 1.2 2003/06/17 04:28:18 dillon Exp $
4 * From: $NetBSD: pread.c,v 1.2 1997/03/22 01:48:38 thorpej Exp $
9 * Matthias Drochner. All rights reserved.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed for the NetBSD Project
22 * by Matthias Drochner.
23 * 4. The name of the author may not be used to endorse or promote products
24 * derived from this software without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 /* read into destination in flat addr space */
46 #define BUFSIZE (1*1024)
48 #define BUFSIZE (4*1024)
51 static char buf[BUFSIZE];
65 count = (rsize < BUFSIZE ? rsize : BUFSIZE);
67 got = read(fd, buf, count);
71 /* put to physical space */
72 vpbcopy(buf, dest, got);
79 return (size - rsize);