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_fadvise64(int, off64_t, off64_t, int); 76 extern int posix_fadvise(int, off_t, off_t, int); 77 extern int posix_fallocate64(int, off64_t, off64_t); 78 extern int posix_fallocate(int, off_t, off_t); 79 extern ssize_t splice(int, off64_t*, int, off64_t*, size_t, unsigned int); 80 extern ssize_t tee(int, int, size_t, unsigned int); 81 extern int unlinkat(int, const char*, int); 82 extern ssize_t vmsplice(int, const struct iovec*, size_t, unsigned int); 83 84 #if defined(__BIONIC_FORTIFY) 85 86 extern int __open_2(const char*, int); 87 extern int __open_real(const char*, int, ...) __asm__(__USER_LABEL_PREFIX__ "open"); 88 extern int __openat_2(int, const char*, int); 89 extern int __openat_real(int, const char*, int, ...) __asm__(__USER_LABEL_PREFIX__ "openat"); 90 __errordecl(__creat_missing_mode, "called with O_CREAT, but missing mode"); 91 __errordecl(__creat_too_many_args, "too many arguments"); 92 93 #if !defined(__clang__) 94 95 __BIONIC_FORTIFY_INLINE 96 int open(const char* pathname, int flags, ...) { 97 if (__builtin_constant_p(flags)) { 98 if ((flags & O_CREAT) && __builtin_va_arg_pack_len() == 0) { 99 __creat_missing_mode(); // compile time error 100 } 101 } 102 103 if (__builtin_va_arg_pack_len() > 1) { 104 __creat_too_many_args(); // compile time error 105 } 106 107 if ((__builtin_va_arg_pack_len() == 0) && !__builtin_constant_p(flags)) { 108 return __open_2(pathname, flags); 109 } 110 111 return __open_real(pathname, flags, __builtin_va_arg_pack()); 112 } 113 114 __BIONIC_FORTIFY_INLINE 115 int openat(int dirfd, const char* pathname, int flags, ...) { 116 if (__builtin_constant_p(flags)) { 117 if ((flags & O_CREAT) && __builtin_va_arg_pack_len() == 0) { 118 __creat_missing_mode(); // compile time error 119 } 120 } 121 122 if (__builtin_va_arg_pack_len() > 1) { 123 __creat_too_many_args(); // compile time error 124 } 125 126 if ((__builtin_va_arg_pack_len() == 0) && !__builtin_constant_p(flags)) { 127 return __openat_2(dirfd, pathname, flags); 128 } 129 130 return __openat_real(dirfd, pathname, flags, __builtin_va_arg_pack()); 131 } 132 133 #endif /* !defined(__clang__) */ 134 135 #endif /* defined(__BIONIC_FORTIFY) */ 136 137 __END_DECLS 138 139 #endif /* _FCNTL_H */ 140
