1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #define _BSD_SOURCE
20 #include <sys/cdefs.h>
21 
22 #include <unistd.h> // For environ.
23 
24 #include <stddef.h> // For size_t.
25 
26 #include <sys/random.h> // For getentropy.
27 
28 #define __BEGIN_HIDDEN_DECLS _Pragma("GCC visibility push(hidden)")
29 #define __END_HIDDEN_DECLS _Pragma("GCC visibility pop")
30 
31 extern const char* __progname;
32 
33 /* Ignore all DEF_STRONG/DEF_WEAK in OpenBSD. */
34 #define DEF_STRONG(sym)
35 #define DEF_WEAK(sym)
36 #define __weak_alias __strong_alias
37 
38 /* Ignore all __warn_references in OpenBSD. */
39 #define __warn_references(sym,msg)
40 
41 #define PROTO_NORMAL(x)
42 
43 /* OpenBSD's <ctype.h> uses these names, which conflicted with stlport.
44  * Additionally, we changed the numeric/digit type from N to D for libcxx.
45  */
46 #define _U _CTYPE_U
47 #define _L _CTYPE_L
48 #define _N _CTYPE_D
49 #define _S _CTYPE_S
50 #define _P _CTYPE_P
51 #define _C _CTYPE_C
52 #define _X _CTYPE_X
53 #define _B _CTYPE_B
54 
55 /* OpenBSD has this, but we can't really implement it correctly on Linux. */
56 #define issetugid() 0
57 
58 #define explicit_bzero(p, s) memset(p, 0, s)
59 
60 /* OpenBSD has these in <sys/param.h>, but "ALIGN" isn't something we want to reserve. */
61 #define ALIGNBYTES (sizeof(uintptr_t) - 1)
62 #define ALIGN(p) (((uintptr_t)(p) + ALIGNBYTES) &~ ALIGNBYTES)
63 
64 /* OpenBSD has this in paths.h. But this directory doesn't normally exist.
65  * Even when it does exist, only the 'shell' user has permissions.
66  */
67 #define _PATH_TMP "/data/local/tmp/"
68 
69 /* Use appropriate shell depending on process's executable. */
70 __LIBC_HIDDEN__ extern const char* __bionic_get_shell_path();
71 #define _PATH_BSHELL __bionic_get_shell_path()
72 
73 __LIBC_HIDDEN__ extern char* __findenv(const char*, int, int*);
74 __LIBC_HIDDEN__ extern char* _mktemp(char*);
75 
76 // Only OpenBSD has this at the moment, and we're more likely to just say
77 // "malloc is always calloc", so we don't expose this as libc API.
78 __LIBC_HIDDEN__ void* recallocarray(void*, size_t, size_t, size_t);
79