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 /* Copyright (c) 1984 AT&T */
23*0Sstevel@tonic-gate /* All Rights Reserved */
24*0Sstevel@tonic-gate
25*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 1.2 */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate /*LINTLIBRARY*/
28*0Sstevel@tonic-gate /*
29*0Sstevel@tonic-gate * getenv(name)
30*0Sstevel@tonic-gate * returns ptr to value associated with name, if any, else NULL
31*0Sstevel@tonic-gate */
32*0Sstevel@tonic-gate #define NULL 0
33*0Sstevel@tonic-gate extern char **environ;
34*0Sstevel@tonic-gate static char *nvmatch();
35*0Sstevel@tonic-gate
36*0Sstevel@tonic-gate char *
getenv(name)37*0Sstevel@tonic-gate getenv(name)
38*0Sstevel@tonic-gate register char *name;
39*0Sstevel@tonic-gate {
40*0Sstevel@tonic-gate register char *v, **p=environ;
41*0Sstevel@tonic-gate
42*0Sstevel@tonic-gate if(p == NULL)
43*0Sstevel@tonic-gate return(NULL);
44*0Sstevel@tonic-gate while(*p != NULL)
45*0Sstevel@tonic-gate if((v = nvmatch(name, *p++)) != NULL)
46*0Sstevel@tonic-gate return(v);
47*0Sstevel@tonic-gate return(NULL);
48*0Sstevel@tonic-gate }
49*0Sstevel@tonic-gate
50*0Sstevel@tonic-gate /*
51*0Sstevel@tonic-gate * s1 is either name, or name=value
52*0Sstevel@tonic-gate * s2 is name=value
53*0Sstevel@tonic-gate * if names match, return value of s2, else NULL
54*0Sstevel@tonic-gate * used for environment searching: see getenv
55*0Sstevel@tonic-gate */
56*0Sstevel@tonic-gate
57*0Sstevel@tonic-gate static char *
nvmatch(s1,s2)58*0Sstevel@tonic-gate nvmatch(s1, s2)
59*0Sstevel@tonic-gate register char *s1, *s2;
60*0Sstevel@tonic-gate {
61*0Sstevel@tonic-gate while(*s1 == *s2++)
62*0Sstevel@tonic-gate if(*s1++ == '=')
63*0Sstevel@tonic-gate return(s2);
64*0Sstevel@tonic-gate if(*s1 == '\0' && *(s2-1) == '=')
65*0Sstevel@tonic-gate return(s2);
66*0Sstevel@tonic-gate return(NULL);
67*0Sstevel@tonic-gate }
68