1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5 *                      and is licensed under the                       *
6 *                 Eclipse Public License, Version 1.0                  *
7 *                    by AT&T Intellectual Property                     *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *          http://www.eclipse.org/org/documents/epl-v10.html           *
11 *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12 *                                                                      *
13 *              Information and Software Systems Research               *
14 *                            AT&T Research                             *
15 *                           Florham Park NJ                            *
16 *                                                                      *
17 *               Glenn Fowler <glenn.s.fowler@gmail.com>                *
18 *                    David Korn <dgkorn@gmail.com>                     *
19 *                     Phong Vo <phongvo@gmail.com>                     *
20 *                                                                      *
21 ***********************************************************************/
22 #pragma prototyped
23 
24 #define setenv		______setenv
25 
26 #include <ast.h>
27 
28 #undef	setenv
29 #undef	_lib_setenv	/* procopen() calls setenv() */
30 
31 #if _lib_setenv
32 
33 NoN(setenv)
34 
35 #else
36 
37 #undef	_def_map_ast
38 #include <ast_map.h>
39 
40 #if defined(__EXPORT__)
41 #define extern	__EXPORT__
42 #endif
43 
44 extern int
45 setenv(const char* name, const char* value, int overwrite)
46 {
47 	char*	s;
48 
49 	if (overwrite || !getenv(name))
50 	{
51 		if (!(s = sfprints("%s=%s", name, value)) || !(s = strdup(s)))
52 			return -1;
53 		return setenviron(s) ? 0 : -1;
54 	}
55 	return 0;
56 }
57 
58 #endif
59