Commit | Line | Data |
---|---|---|
d42e7319 JB |
1 | /* |
2 | * Copyright (C) 2010 The Android Open Source Project | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * * Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * * Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in | |
12 | * the documentation and/or other materials provided with the | |
13 | * distribution. | |
14 | * | |
15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
16 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
17 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
18 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
19 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
22 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED | |
23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT | |
25 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
26 | * SUCH DAMAGE. | |
27 | */ | |
28 | #ifndef LINKER_ENVIRON_H | |
29 | #define LINKER_ENVIRON_H | |
30 | ||
31 | /* Call this function before anything else. 'vecs' must be the pointer | |
32 | * to the environment block in the ELF data block. The function returns | |
33 | * the start of the aux vectors after the env block. | |
34 | */ | |
35 | extern unsigned* linker_env_init(unsigned* vecs); | |
36 | ||
37 | /* Unset a given environment variable. In case the variable is defined | |
38 | * multiple times, unset all instances. This modifies the environment | |
39 | * block, so any pointer returned by linker_env_get() after this call | |
40 | * might become invalid */ | |
41 | extern void linker_env_unset(const char* name); | |
42 | ||
43 | ||
44 | /* Returns the value of environment variable 'name' if defined and not | |
45 | * empty, or NULL otherwise. Note that the returned pointer may become | |
46 | * invalid if linker_env_unset() or linker_env_secure() are called | |
47 | * after this function. */ | |
48 | extern const char* linker_env_get(const char* name); | |
49 | ||
50 | /* Remove unsecure environment variables. This should be used when | |
51 | * running setuid programs. */ | |
52 | extern void linker_env_secure(void); | |
53 | ||
54 | #endif /* LINKER_ENVIRON_H */ |