1 /* $NetBSD: compat_putenv.c,v 1.3 2015/01/20 18:31:24 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
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 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31 #include <sys/cdefs.h>
32 #if defined(LIBC_SCCS) && !defined(lint)
33 __RCSID("$NetBSD: compat_putenv.c,v 1.3 2015/01/20 18:31:24 christos Exp $");
34 #endif /* LIBC_SCCS and not lint */
35
36 #define __LIBC12_SOURCE__
37 #include "namespace.h"
38
39 #include <assert.h>
40 #include <errno.h>
41 #include <stdlib.h>
42 #include <string.h>
43 #include <compat/include/stdlib.h>
44
45 #include "env.h"
46 #include "local.h"
47
48 #ifdef __weak_alias
__weak_alias(putenv,_putenv)49 __weak_alias(putenv,_putenv)
50 #endif
51
52 __warn_references(putenv,
53 "warning: reference to compatibility putenv();"
54 " include <stdlib.h> for correct reference")
55
56 /*
57 * putenv(name) --
58 * This version implicitly copies the string for compatibility.
59 */
60 int
61 putenv(char *name)
62 {
63 size_t l_name;
64 char *copy;
65 int rv;
66
67 _DIAGASSERT(name != NULL);
68
69 l_name = __envvarnamelen(name, true);
70 if (l_name == 0) {
71 errno = EINVAL;
72 return -1;
73 }
74
75 if ((copy = strdup(name)) == NULL)
76 return -1;
77 copy[l_name++] = '\0';
78
79 rv = setenv(copy, copy + l_name, 1);
80
81 free(copy);
82 return rv;
83 }
84