1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/*
* Copyright (C) 2017 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _FCNTL_H
#error "Never include this file directly; instead, include <fcntl.h>"
#endif
int __open_2(const char*, int) __INTRODUCED_IN(17);
int __openat_2(int, const char*, int) __INTRODUCED_IN(17);
/*
* These are the easiest way to call the real open even in clang FORTIFY.
*/
int __open_real(const char*, int, ...) __RENAME(open);
int __openat_real(int, const char*, int, ...) __RENAME(openat);
#if defined(__BIONIC_FORTIFY)
#define __open_too_many_args_error "too many arguments"
#define __open_too_few_args_error "called with O_CREAT or O_TMPFILE, but missing mode"
#define __open_useless_modes_warning "has superfluous mode bits; missing O_CREAT?"
/* O_TMPFILE shares bits with O_DIRECTORY. */
#define __open_modes_useful(flags) (((flags) & O_CREAT) || ((flags) & O_TMPFILE) == O_TMPFILE)
__BIONIC_ERROR_FUNCTION_VISIBILITY
int open(const char* pathname, int flags, mode_t modes, ...) __overloadable
__errorattr(__open_too_many_args_error);
/*
* pass_object_size serves two purposes here, neither of which involve __bos: it
* disqualifies this function from having its address taken (so &open works),
* and it makes overload resolution prefer open(const char *, int) over
* open(const char *, int, ...).
*/
__BIONIC_FORTIFY_INLINE
int open(const char* const __pass_object_size pathname, int flags)
__overloadable
__clang_error_if(__open_modes_useful(flags), "'open' " __open_too_few_args_error) {
#if __ANDROID_API__ >= 17 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
return __open_2(pathname, flags);
#else
return __open_real(pathname, flags);
#endif
}
__BIONIC_FORTIFY_INLINE
int open(const char* const __pass_object_size pathname, int flags, mode_t modes)
__overloadable
__clang_warning_if(!__open_modes_useful(flags) && modes,
"'open' " __open_useless_modes_warning) {
return __open_real(pathname, flags, modes);
}
__BIONIC_ERROR_FUNCTION_VISIBILITY
int openat(int dirfd, const char* pathname, int flags, mode_t modes, ...)
__overloadable
__errorattr(__open_too_many_args_error);
__BIONIC_FORTIFY_INLINE
int openat(int dirfd, const char* const __pass_object_size pathname, int flags)
__overloadable
__clang_error_if(__open_modes_useful(flags), "'openat' " __open_too_few_args_error) {
#if __ANDROID_API__ >= 17 && __BIONIC_FORTIFY_RUNTIME_CHECKS_ENABLED
return __openat_2(dirfd, pathname, flags);
#else
return __openat_real(dirfd, pathname, flags);
#endif
}
__BIONIC_FORTIFY_INLINE
int openat(int dirfd, const char* const __pass_object_size pathname, int flags, mode_t modes)
__overloadable
__clang_warning_if(!__open_modes_useful(flags) && modes,
"'openat' " __open_useless_modes_warning) {
return __openat_real(dirfd, pathname, flags, modes);
}
#if __ANDROID_API__ >= 21
/* Note that open == open64, so we reuse those bits in the open64 variants below. */
__BIONIC_ERROR_FUNCTION_VISIBILITY
int open64(const char* pathname, int flags, mode_t modes, ...) __overloadable
__errorattr(__open_too_many_args_error);
__BIONIC_FORTIFY_INLINE
int open64(const char* const __pass_object_size pathname, int flags)
__overloadable
__clang_error_if(__open_modes_useful(flags), "'open64' " __open_too_few_args_error) {
return open(pathname, flags);
}
__BIONIC_FORTIFY_INLINE
int open64(const char* const __pass_object_size pathname, int flags, mode_t modes)
__overloadable
__clang_warning_if(!__open_modes_useful(flags) && modes,
"'open64' " __open_useless_modes_warning) {
return open(pathname, flags, modes);
}
__BIONIC_ERROR_FUNCTION_VISIBILITY
int openat64(int dirfd, const char* pathname, int flags, mode_t modes, ...)
__overloadable
__errorattr(__open_too_many_args_error);
__BIONIC_FORTIFY_INLINE
int openat64(int dirfd, const char* const __pass_object_size pathname, int flags)
__overloadable
__clang_error_if(__open_modes_useful(flags), "'openat64' " __open_too_few_args_error) {
return openat(dirfd, pathname, flags);
}
__BIONIC_FORTIFY_INLINE
int openat64(int dirfd, const char* const __pass_object_size pathname, int flags, mode_t modes)
__overloadable
__clang_warning_if(!__open_modes_useful(flags) && modes,
"'openat64' " __open_useless_modes_warning) {
return openat(dirfd, pathname, flags, modes);
}
#endif /* __ANDROID_API__ >= 21 */
#undef __open_too_many_args_error
#undef __open_too_few_args_error
#undef __open_useless_modes_warning
#undef __open_modes_useful
#endif /* defined(__BIONIC_FORTIFY) */
|
