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