1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 30*0Sstevel@tonic-gate /* All Rights Reserved */ 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate #pragma weak gethz = _gethz 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate #include "synonyms.h" 36*0Sstevel@tonic-gate #include <stdio.h> 37*0Sstevel@tonic-gate #include <ctype.h> 38*0Sstevel@tonic-gate #include <stdlib.h> 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate /* 41*0Sstevel@tonic-gate * gethz -- get the value of the clock hertz from the environment. 42*0Sstevel@tonic-gate * 43*0Sstevel@tonic-gate * return the clock hertz value if the string "HZ" in the environment is: 44*0Sstevel@tonic-gate * 1) Composed entirely of numbers. 45*0Sstevel@tonic-gate * 2) Not equal to zero. 46*0Sstevel@tonic-gate * Otherwise 0 is returned. 47*0Sstevel@tonic-gate */ 48*0Sstevel@tonic-gate int 49*0Sstevel@tonic-gate gethz(void) 50*0Sstevel@tonic-gate { 51*0Sstevel@tonic-gate char *sptr, *cptr; 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate if ((sptr = getenv("HZ")) == NULL) { 54*0Sstevel@tonic-gate return (0); 55*0Sstevel@tonic-gate } else { 56*0Sstevel@tonic-gate cptr = sptr; 57*0Sstevel@tonic-gate 58*0Sstevel@tonic-gate /* Check that all characters are numeric */ 59*0Sstevel@tonic-gate while (*cptr) { 60*0Sstevel@tonic-gate if (!isdigit((unsigned char)*cptr)) 61*0Sstevel@tonic-gate return (0); 62*0Sstevel@tonic-gate cptr++; 63*0Sstevel@tonic-gate } 64*0Sstevel@tonic-gate return (atoi(sptr)); 65*0Sstevel@tonic-gate } 66*0Sstevel@tonic-gate } 67