source: trunk/minix/commands/autil/rd_bytes.c@ 10

Last change on this file since 10 was 9, checked in by Mattia Monga, 13 years ago

Minix 3.1.2a

File size: 803 bytes
Line 
1/* $Id: rd_bytes.c,v 1.1 2005/06/23 09:50:54 philip Exp $ */
2/*
3 * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
4 * See the copyright notice in the ACK home directory, in the file "Copyright".
5 */
6
7#include "obj.h"
8
9#define MININT (1 << (sizeof(int) * 8 - 1))
10#define MAXCHUNK (~MININT) /* Highest count we read(2). */
11/* Unfortunately, MAXCHUNK is too large with some compilers. Put it in
12 an int!
13*/
14
15static int maxchunk = MAXCHUNK;
16
17/*
18 * We don't have to worry about byte order here.
19 * Just read "cnt" bytes from file-descriptor "fd".
20 */
21void
22rd_bytes(fd, string, cnt)
23 register char *string;
24 register long cnt;
25{
26
27 while (cnt) {
28 register int n = cnt >= maxchunk ? maxchunk : cnt;
29
30 if (read(fd, string, n) != n)
31 rd_fatal();
32 string += n;
33 cnt -= n;
34 }
35}
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