|
145
|
1 /* Copyright (C) 2017-2020 Free Software Foundation, Inc.
|
|
111
|
2
|
|
|
3 This file is part of GCC.
|
|
|
4
|
|
|
5 GCC is free software; you can redistribute it and/or modify
|
|
|
6 it under the terms of the GNU General Public License as published by
|
|
|
7 the Free Software Foundation; either version 3, or (at your option)
|
|
|
8 any later version.
|
|
|
9
|
|
|
10 GCC is distributed in the hope that it will be useful,
|
|
|
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
13 GNU General Public License for more details.
|
|
|
14
|
|
|
15 Under Section 7 of GPL version 3, you are granted additional
|
|
|
16 permissions described in the GCC Runtime Library Exception, version
|
|
|
17 3.1, as published by the Free Software Foundation.
|
|
|
18
|
|
|
19 You should have received a copy of the GNU General Public License and
|
|
|
20 a copy of the GCC Runtime Library Exception along with this program;
|
|
|
21 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
|
22 <http://www.gnu.org/licenses/>. */
|
|
|
23
|
|
|
24 #ifndef _SECURE_GETENV_H
|
|
|
25 #define _SECURE_GETENV_H 1
|
|
|
26
|
|
|
27 /* Secure getenv() which returns NULL if running as SUID/SGID. */
|
|
|
28 #ifndef HAVE_SECURE_GETENV
|
|
|
29 #if defined (HAVE_UNISTD_H) && defined (HAVE_GETUID) \
|
|
|
30 && defined (HAVE_GETEUID) && defined (HAVE_GETGID) \
|
|
|
31 && defined (HAVE_GETEGID)
|
|
|
32
|
|
|
33 #include <unistd.h>
|
|
|
34
|
|
|
35 #if SUPPORTS_WEAKREF && defined (HAVE___SECURE_GETENV)
|
|
|
36 static char* weak_secure_getenv (const char*)
|
|
|
37 __attribute__((__weakref__("__secure_getenv")));
|
|
|
38 #endif
|
|
|
39
|
|
|
40 /* Implementation of secure_getenv() for targets where it is not provided but
|
|
|
41 we have at least means to test real and effective IDs. */
|
|
|
42
|
|
|
43 static inline char *
|
|
|
44 secure_getenv (const char *name)
|
|
|
45 {
|
|
|
46 #if SUPPORTS_WEAKREF && defined (HAVE___SECURE_GETENV)
|
|
|
47 if (weak_secure_getenv)
|
|
|
48 return weak_secure_getenv (name);
|
|
|
49 #endif
|
|
|
50
|
|
|
51 if ((getuid () == geteuid ()) && (getgid () == getegid ()))
|
|
|
52 return getenv (name);
|
|
|
53 else
|
|
|
54 return NULL;
|
|
|
55 }
|
|
|
56 #else
|
|
|
57 #define secure_getenv getenv
|
|
|
58 #endif
|
|
|
59 #endif
|
|
|
60
|
|
|
61 #endif /* _SECURE_GETENV_H. */
|
