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
64extern int creat(const char*, mode_t);
65extern int creat64(const char*, mode_t);
66extern int fcntl(int, int, ...);
67extern int openat(int, const char*, int, ...);
68extern int openat64(int, const char*, int, ...);
69extern int open(const char*, int, ...);
70extern int open64(const char*, int, ...);
71extern ssize_t splice(int, off64_t*, int, off64_t*, size_t, unsigned int);
72extern ssize_t tee(int, int, size_t, unsigned int);
73extern int unlinkat(int, const char*, int);
74extern ssize_t vmsplice(int, const struct iovec*, size_t, unsigned int);
75
76#if defined(__USE_FILE_OFFSET64)
77extern int fallocate(int, int, off_t, off_t) __RENAME(fallocate64);
78extern int posix_fadvise(int, off_t, off_t, int) __RENAME(posix_fadvise64);
79extern int posix_fallocate(int, off_t, off_t) __RENAME(posix_fallocate);
80#else
81extern int fallocate(int, int, off_t, off_t);
82extern int posix_fadvise(int, off_t, off_t, int);
83extern int posix_fallocate(int, off_t, off_t);
84#endif
85extern int fallocate64(int, int, off64_t, off64_t);
86extern int posix_fadvise64(int, off64_t, off64_t, int);
87extern int posix_fallocate64(int, off64_t, off64_t);
88
89extern int __open_2(const char*, int);
90extern int __open_real(const char*, int, ...) __RENAME(open);
91extern int __openat_2(int, const char*, int);
92extern 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
101int 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
120int 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