blob: 9579d5bcd39377e297556699b337420baf1d1afe (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#pragma weak _gethz = gethz
#include "lint.h"
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
/*
* gethz -- get the value of the clock hertz from the environment.
*
* return the clock hertz value if the string "HZ" in the environment is:
* 1) Composed entirely of numbers.
* 2) Not equal to zero.
* Otherwise 0 is returned.
*/
int
gethz(void)
{
char *sptr, *cptr;
if ((sptr = getenv("HZ")) == NULL) {
return (0);
} else {
cptr = sptr;
/* Check that all characters are numeric */
while (*cptr) {
if (!isdigit((unsigned char)*cptr))
return (0);
cptr++;
}
return (atoi(sptr));
}
}
|
