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