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/uio.h>
37 #include <unistd.h> /* this is not required, but makes client code much happier */
38
39 __BEGIN_DECLS
40
41 #ifdef __LP64__
42 /* LP64 kernels don't have flock64 because their flock is 64-bit. */
43 struct flock64 {
44 short l_type;
45 short l_whence;
46 off64_t l_start;
47 off64_t l_len;
48 pid_t l_pid;
49 };
50 #define F_GETLK64 F_GETLK
51 #define F_SETLK64 F_SETLK
52 #define F_SETLKW64 F_SETLKW
53 #endif
54
55 #define O_ASYNC FASYNC
56
57 #define SPLICE_F_MOVE 1
58 #define SPLICE_F_NONBLOCK 2
59 #define SPLICE_F_MORE 4
60 #define SPLICE_F_GIFT 8
61
62 #define SYNC_FILE_RANGE_WAIT_BEFORE 1
63 #define SYNC_FILE_RANGE_WRITE 2
64 #define SYNC_FILE_RANGE_WAIT_AFTER 4
65
66 extern int creat(const char*, mode_t);
67 extern int creat64(const char*, mode_t);
68 extern int fallocate64(int, int, off64_t, off64_t);
69 extern int fallocate(int, int, off_t, off_t);
70 extern int fcntl(int, int, ...);
71 extern int openat(int, const char*, int, ...);
72 extern int openat64(int, const char*, int, ...);
73 extern int open(const char*, int, ...);
74 extern int open64(const char*, int, ...);
75 extern int posix_fallocate64(int, off64_t, off64_t);
76 extern int posix_fallocate(int, off_t, off_t);
77 extern ssize_t splice(int, off64_t*, int, off64_t*, size_t, unsigned int);
78 extern ssize_t tee(int, int, size_t, unsigned int);
79 extern int unlinkat(int, const char*, int);
80 extern ssize_t vmsplice(int, const struct iovec*, size_t, unsigned int);
81
82 #if defined(__BIONIC_FORTIFY)
83
84 extern int __open_2(const char*, int);
85 extern int __open_real(const char*, int, ...) __asm__(__USER_LABEL_PREFIX__ "open");
86 extern int __openat_2(int, const char*, int);
87 extern int __openat_real(int, const char*, int, ...) __asm__(__USER_LABEL_PREFIX__ "openat");
88 __errordecl(__creat_missing_mode, "called with O_CREAT, but missing mode");
89 __errordecl(__creat_too_many_args, "too many arguments");
90
91 #if !defined(__clang__)
92
93 __BIONIC_FORTIFY_INLINE
open(const char * pathname,int flags,...)94 int open(const char* pathname, int flags, ...) {
95 if (__builtin_constant_p(flags)) {
96 if ((flags & O_CREAT) && __builtin_va_arg_pack_len() == 0) {
97 __creat_missing_mode(); // compile time error
98 }
99 }
100
101 if (__builtin_va_arg_pack_len() > 1) {
102 __creat_too_many_args(); // compile time error
103 }
104
105 if ((__builtin_va_arg_pack_len() == 0) && !__builtin_constant_p(flags)) {
106 return __open_2(pathname, flags);
107 }
108
109 return __open_real(pathname, flags, __builtin_va_arg_pack());
110 }
111
112 __BIONIC_FORTIFY_INLINE
openat(int dirfd,const char * pathname,int flags,...)113 int openat(int dirfd, const char* pathname, int flags, ...) {
114 if (__builtin_constant_p(flags)) {
115 if ((flags & O_CREAT) && __builtin_va_arg_pack_len() == 0) {
116 __creat_missing_mode(); // compile time error
117 }
118 }
119
120 if (__builtin_va_arg_pack_len() > 1) {
121 __creat_too_many_args(); // compile time error
122 }
123
124 if ((__builtin_va_arg_pack_len() == 0) && !__builtin_constant_p(flags)) {
125 return __openat_2(dirfd, pathname, flags);
126 }
127
128 return __openat_real(dirfd, pathname, flags, __builtin_va_arg_pack());
129 }
130
131 #endif /* !defined(__clang__) */
132
133 #endif /* defined(__BIONIC_FORTIFY) */
134
135 __END_DECLS
136
137 #endif /* _FCNTL_H */
138