xref: /netbsd-src/external/ibm-public/postfix/dist/src/util/safe_getenv.c (revision 41fbaed053f8fbfdf9d2a4ee0a7386a3c83f8505)
1 /*	$NetBSD: safe_getenv.c,v 1.1.1.1 2009/06/23 10:09:00 tron Exp $	*/
2 
3 /*++
4 /* NAME
5 /*	safe_getenv 3
6 /* SUMMARY
7 /*	guarded getenv()
8 /* SYNOPSIS
9 /*	#include <safe.h>
10 /*
11 /*	char	*safe_getenv(const name)
12 /*	char	*name;
13 /* DESCRIPTION
14 /*	The \fBsafe_getenv\fR() routine reads the named variable from the
15 /*	environment, provided that the unsafe() routine agrees.
16 /* SEE ALSO
17 /*	unsafe(3), detect non-user privileges
18 /* LICENSE
19 /* .ad
20 /* .fi
21 /*	The Secure Mailer license must be distributed with this software.
22 /* AUTHOR(S)
23 /*	Wietse Venema
24 /*	IBM T.J. Watson Research
25 /*	P.O. Box 704
26 /*	Yorktown Heights, NY 10598, USA
27 /*--*/
28 
29 /* System library. */
30 
31 #include <sys_defs.h>
32 #include <stdlib.h>
33 
34 /* Utility library. */
35 
36 #include "safe.h"
37 
38 /* safe_getenv - read environment variable with guard */
39 
safe_getenv(const char * name)40 char   *safe_getenv(const char *name)
41 {
42     return (unsafe() == 0 ? getenv(name) : 0);
43 }
44