/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 (c) 1984 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 1.2 */
/*LINTLIBRARY*/
/*
* getenv(name)
* returns ptr to value associated with name, if any, else NULL
*/
#define NULL 0
extern char **environ;
static char *nvmatch();
char *
getenv(name)
register char *name;
{
register char *v, **p=environ;
if(p == NULL)
return(NULL);
while(*p != NULL)
if((v = nvmatch(name, *p++)) != NULL)
return(v);
return(NULL);
}
/*
* s1 is either name, or name=value
* s2 is name=value
* if names match, return value of s2, else NULL
* used for environment searching: see getenv
*/
static char *
nvmatch(s1, s2)
register char *s1, *s2;
{
while(*s1 == *s2++)
if(*s1++ == '=')
return(s2);
if(*s1 == '\0' && *(s2-1) == '=')
return(s2);
return(NULL);
}