1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 1994 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26
27#include <stdlib.h>
28#include <string.h>
29#include <unistd.h>
30
31extern	char	**environ;
32
33static	short	setenv_made_new_vector= 0;
34
35char *setenv(char *name, char *value)
36{	char *p= NULL, **q;
37	int length= 0, vl;
38
39	if ((p= getenv(name)) == NULL) {	/* Allocate new vector */
40		for (q= environ; *q != NULL; q++, length++);
41		q= (char **)malloc((unsigned)(sizeof(char *)*(length+2)));
42                memcpy(((char *)q)+sizeof(char *), (char *)environ, sizeof(char *)*(length+1));
43		if (setenv_made_new_vector++)
44			free((char *)environ);
45		length= strlen(name);
46		environ= q;}
47	else { /* Find old slot */
48		length= strlen(name);
49		for (q= environ; *q != NULL; q++)
50			if (!strncmp(*q, name, length))
51				break;};
52	vl= strlen(value);
53	if (!p || (length+vl+1 > strlen(p)))
54		*q= p= (char *) malloc((unsigned)(length+vl+2));
55	else
56		p= *q;
57	(void)strcpy(p, name); p+= length;
58	*p++= '=';
59	(void)strcpy(p, value);
60	return(value);
61}
62