1 /*
2 * Copyright (C) 2008 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
29 #ifndef _FCNTL_H
30 #define _FCNTL_H
31
32 #include <sys/cdefs.h>
33 #include <sys/types.h>
34 #include <linux/fadvise.h>
35 #include <linux/fcntl.h>
36 #include <linux/stat.h>
37 #include <linux/uio.h>
38
39 #if defined(__USE_GNU) || defined(__USE_BSD)
40 #include <bits/lockf.h>
41 #endif
42
43 __BEGIN_DECLS
44
45 #ifdef __LP64__
46 /* LP64 kernels don't have F_*64 defines because their flock is 64-bit. */
47 #define F_GETLK64 F_GETLK
48 #define F_SETLK64 F_SETLK
49 #define F_SETLKW64 F_SETLKW
50 #endif
51
52 #define O_ASYNC FASYNC
53 #define O_RSYNC O_SYNC
54
55 #define SPLICE_F_MOVE 1
56 #define SPLICE_F_NONBLOCK 2
57 #define SPLICE_F_MORE 4
58 #define SPLICE_F_GIFT 8
59
60 #define SYNC_FILE_RANGE_WAIT_BEFORE 1
61 #define SYNC_FILE_RANGE_WRITE 2
62 #define SYNC_FILE_RANGE_WAIT_AFTER 4
63
64 extern int creat(const char*, mode_t);
65 extern int creat64(const char*, mode_t);
66 extern int fcntl(int, int, ...);
67 extern int openat(int, const char*, int, ...);
68 extern int openat64(int, const char*, int, ...);
69 extern int open(const char*, int, ...);
70 extern int open64(const char*, int, ...);
71 extern ssize_t splice(int, off64_t*, int, off64_t*, size_t, unsigned int);
72 extern ssize_t tee(int, int, size_t, unsigned int);
73 extern int unlinkat(int, const char*, int);
74 extern ssize_t vmsplice(int, const struct iovec*, size_t, unsigned int);
75
76 #if defined(__USE_FILE_OFFSET64)
77 extern int fallocate(int, int, off_t, off_t) __RENAME(fallocate64);
78 extern int posix_fadvise(int, off_t, off_t, int) __RENAME(posix_fadvise64);
79 extern int posix_fallocate(int, off_t, off_t) __RENAME(posix_fallocate);
80 #else
81 extern int fallocate(int, int, off_t, off_t);
82 extern int posix_fadvise(int, off_t, off_t, int);
83 extern int posix_fallocate(int, off_t, off_t);
84 #endif
85 extern int fallocate64(int, int, off64_t, off64_t);
86 extern int posix_fadvise64(int, off64_t, off64_t, int);
87 extern int posix_fallocate64(int, off64_t, off64_t);
88
89 extern int __open_2(const char*, int);
90 extern int __open_real(const char*, int, ...) __RENAME(open);
91 extern int __openat_2(int, const char*, int);
92 extern int __openat_real(int, const char*, int, ...) __RENAME(openat);
93 __errordecl(__creat_missing_mode, "called with O_CREAT, but missing mode");
94 __errordecl(__creat_too_many_args, "too many arguments");
95
96 #if defined(__BIONIC_FORTIFY)
97
98 #if !defined(__clang__)
99
100 __BIONIC_FORTIFY_INLINE
open(const char * pathname,int flags,...)101 int open(const char* pathname, int flags, ...) {
102 if (__builtin_constant_p(flags)) {
103 if ((flags & O_CREAT) && __builtin_va_arg_pack_len() == 0) {
104 __creat_missing_mode(); // compile time error
105 }
106 }
107
108 if (__builtin_va_arg_pack_len() > 1) {
109 __creat_too_many_args(); // compile time error
110 }
111
112 if ((__builtin_va_arg_pack_len() == 0) && !__builtin_constant_p(flags)) {
113 return __open_2(pathname, flags);
114 }
115
116 return __open_real(pathname, flags, __builtin_va_arg_pack());
117 }
118
119 __BIONIC_FORTIFY_INLINE
openat(int dirfd,const char * pathname,int flags,...)120 int openat(int dirfd, const char* pathname, int flags, ...) {
121 if (__builtin_constant_p(flags)) {
122 if ((flags & O_CREAT) && __builtin_va_arg_pack_len() == 0) {
123 __creat_missing_mode(); // compile time error
124 }
125 }
126
127 if (__builtin_va_arg_pack_len() > 1) {
128 __creat_too_many_args(); // compile time error
129 }
130
131 if ((__builtin_va_arg_pack_len() == 0) && !__builtin_constant_p(flags)) {
132 return __openat_2(dirfd, pathname, flags);
133 }
134
135 return __openat_real(dirfd, pathname, flags, __builtin_va_arg_pack());
136 }
137
138 #endif /* !defined(__clang__) */
139
140 #endif /* defined(__BIONIC_FORTIFY) */
141
142 __END_DECLS
143
144 #endif /* _FCNTL_H */
145