1/*	$NetBSD: setenv.c,v 1.1.1.1 2011/04/13 18:15:43 elric Exp $	*/
2
3/*
4 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include <config.h>
37
38#include <krb5/roken.h>
39
40#include <stdlib.h>
41#include <string.h>
42
43/*
44 * This is the easy way out, use putenv to implement setenv. We might
45 * leak some memory but that is ok since we are usally about to exec
46 * anyway.
47 */
48
49ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
50setenv(const char *var, const char *val, int rewrite)
51{
52#ifndef _WIN32
53    char *t = NULL;
54
55    if (!rewrite && getenv(var) != 0)
56	return 0;
57
58    if (asprintf (&t, "%s=%s", var, val) < 0 || t == NULL)
59	return -1;
60
61    if (putenv(t) == 0)
62	return 0;
63    else
64	return -1;
65#else  /* Win32 */
66    char dummy[8];
67
68    if (!rewrite && GetEnvironmentVariable(var, dummy, sizeof(dummy)/sizeof(char)) != 0)
69	return 0;
70
71    if (SetEnvironmentVariable(var, val) == 0)
72	return -1;
73    else
74	return 0;
75#endif
76}
77