1 /* O_*, F_*, FD_* bit values for Linux/x86-64. 2 Copyright (C) 2001, 2002, 2004, 2006, 2007 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <http://www.gnu.org/licenses/>. */ 18 19 #ifndef _FCNTL_H 20 # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead." 21 #endif 22 23 #include <sys/types.h> 24 #include <bits/wordsize.h> 25 #ifdef __USE_GNU 26 # include <bits/uio.h> 27 #endif 28 29 30 /* open/fcntl - O_SYNC is only implemented on blocks devices and on files 31 located on an ext2 file system */ 32 #define O_ACCMODE 0003 33 #define O_RDONLY 00 34 #define O_WRONLY 01 35 #define O_RDWR 02 36 #define O_CREAT 0100 /* not fcntl */ 37 #define O_EXCL 0200 /* not fcntl */ 38 #define O_NOCTTY 0400 /* not fcntl */ 39 #define O_TRUNC 01000 /* not fcntl */ 40 #define O_APPEND 02000 41 #define O_NONBLOCK 04000 42 #define O_NDELAY O_NONBLOCK 43 #define O_SYNC 010000 44 #define O_FSYNC O_SYNC 45 #define O_ASYNC 020000 46 47 #ifdef __USE_XOPEN2K8 48 # define O_DIRECTORY 0200000 /* Must be a directory. */ 49 # define O_NOFOLLOW 0400000 /* Do not follow links. */ 50 # define O_CLOEXEC 02000000 /* Set close_on_exec. */ 51 #endif 52 53 #ifdef __USE_GNU 54 # define O_DIRECT 040000 /* Direct disk access. */ 55 # define O_NOATIME 01000000 /* Do not set atime. */ 56 # define O_PATH 010000000 /* Resolve pathname but do not open file. */ 57 # define O_TMPFILE 020200000 /* Atomically create nameless file. */ 58 #endif 59 60 /* For now Linux has synchronisity options for data and read operations. 61 We define the symbols here but let them do the same as O_SYNC since 62 this is a superset. */ 63 #if defined __USE_POSIX199309 || defined __USE_UNIX98 64 # define O_DSYNC O_SYNC /* Synchronize data. */ 65 # define O_RSYNC O_SYNC /* Synchronize read operations. */ 66 #endif 67 68 #ifdef __USE_LARGEFILE64 69 # if __WORDSIZE == 64 70 # define O_LARGEFILE 0 71 # else 72 # define O_LARGEFILE 0100000 73 # endif 74 #endif 75 76 /* Values for the second argument to `fcntl'. */ 77 #define F_DUPFD 0 /* Duplicate file descriptor. */ 78 #define F_GETFD 1 /* Get file descriptor flags. */ 79 #define F_SETFD 2 /* Set file descriptor flags. */ 80 #define F_GETFL 3 /* Get file status flags. */ 81 #define F_SETFL 4 /* Set file status flags. */ 82 #if __WORDSIZE == 64 83 # define F_GETLK 5 /* Get record locking info. */ 84 # define F_SETLK 6 /* Set record locking info (non-blocking). */ 85 # define F_SETLKW 7 /* Set record locking info (blocking). */ 86 /* Not necessary, we always have 64-bit offsets. */ 87 # define F_GETLK64 5 /* Get record locking info. */ 88 # define F_SETLK64 6 /* Set record locking info (non-blocking). */ 89 # define F_SETLKW64 7 /* Set record locking info (blocking). */ 90 #else 91 # ifndef __USE_FILE_OFFSET64 92 # define F_GETLK 5 /* Get record locking info. */ 93 # define F_SETLK 6 /* Set record locking info (non-blocking). */ 94 # define F_SETLKW 7 /* Set record locking info (blocking). */ 95 # else 96 # define F_GETLK F_GETLK64 /* Get record locking info. */ 97 # define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/ 98 # define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */ 99 # endif 100 # define F_GETLK64 12 /* Get record locking info. */ 101 # define F_SETLK64 13 /* Set record locking info (non-blocking). */ 102 # define F_SETLKW64 14 /* Set record locking info (blocking). */ 103 #endif 104 105 #if defined __USE_BSD || defined __USE_UNIX98 106 # define F_SETOWN 8 /* Get owner of socket (receiver of SIGIO). */ 107 # define F_GETOWN 9 /* Set owner of socket (receiver of SIGIO). */ 108 #endif 109 110 #ifdef __USE_GNU 111 # define F_SETSIG 10 /* Set number of signal to be sent. */ 112 # define F_GETSIG 11 /* Get number of signal to be sent. */ 113 #endif 114 115 #ifdef __USE_GNU 116 # define F_SETLEASE 1024 /* Set a lease. */ 117 # define F_GETLEASE 1025 /* Enquire what lease is active. */ 118 # define F_NOTIFY 1026 /* Request notfications on a directory. */ 119 # define F_SETPIPE_SZ 1031 /* Set pipe page size array. */ 120 # define F_GETPIPE_SZ 1032 /* Get pipe page size array. */ 121 #endif 122 #if defined __USE_XOPEN2K8 || defined __USE_GNU 123 # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with 124 close-on-exit set on new fd. */ 125 #endif 126 127 /* For F_[GET|SET]FD. */ 128 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */ 129 130 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */ 131 #define F_RDLCK 0 /* Read lock. */ 132 #define F_WRLCK 1 /* Write lock. */ 133 #define F_UNLCK 2 /* Remove lock. */ 134 135 /* For old implementation of bsd flock(). */ 136 #define F_EXLCK 4 /* or 3 */ 137 #define F_SHLCK 8 /* or 4 */ 138 139 #ifdef __USE_BSD 140 /* Operations for bsd flock(), also used by the kernel implementation. */ 141 # define LOCK_SH 1 /* shared lock */ 142 # define LOCK_EX 2 /* exclusive lock */ 143 # define LOCK_NB 4 /* or'd with one of the above to prevent 144 blocking */ 145 # define LOCK_UN 8 /* remove lock */ 146 #endif 147 148 #ifdef __USE_GNU 149 # define LOCK_MAND 32 /* This is a mandatory flock: */ 150 # define LOCK_READ 64 /* ... which allows concurrent read operations. */ 151 # define LOCK_WRITE 128 /* ... which allows concurrent write operations. */ 152 # define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */ 153 #endif 154 155 #ifdef __USE_GNU 156 /* Types of directory notifications that may be requested with F_NOTIFY. */ 157 # define DN_ACCESS 0x00000001 /* File accessed. */ 158 # define DN_MODIFY 0x00000002 /* File modified. */ 159 # define DN_CREATE 0x00000004 /* File created. */ 160 # define DN_DELETE 0x00000008 /* File removed. */ 161 # define DN_RENAME 0x00000010 /* File renamed. */ 162 # define DN_ATTRIB 0x00000020 /* File changed attibutes. */ 163 # define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */ 164 #endif 165 166 struct flock 167 { 168 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 169 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 170 #ifndef __USE_FILE_OFFSET64 171 __off_t l_start; /* Offset where the lock begins. */ 172 __off_t l_len; /* Size of the locked area; zero means until EOF. */ 173 #else 174 __off64_t l_start; /* Offset where the lock begins. */ 175 __off64_t l_len; /* Size of the locked area; zero means until EOF. */ 176 #endif 177 __pid_t l_pid; /* Process holding the lock. */ 178 }; 179 180 #ifdef __USE_LARGEFILE64 181 struct flock64 182 { 183 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 184 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 185 __off64_t l_start; /* Offset where the lock begins. */ 186 __off64_t l_len; /* Size of the locked area; zero means until EOF. */ 187 __pid_t l_pid; /* Process holding the lock. */ 188 }; 189 #endif 190 191 /* Define some more compatibility macros to be backward compatible with 192 BSD systems which did not managed to hide these kernel macros. */ 193 #ifdef __USE_BSD 194 # define FAPPEND O_APPEND 195 # define FFSYNC O_FSYNC 196 # define FASYNC O_ASYNC 197 # define FNONBLOCK O_NONBLOCK 198 # define FNDELAY O_NDELAY 199 #endif /* Use BSD. */ 200 201 /* Advise to `posix_fadvise'. */ 202 #ifdef __USE_XOPEN2K 203 # define POSIX_FADV_NORMAL 0 /* No further special treatment. */ 204 # define POSIX_FADV_RANDOM 1 /* Expect random page references. */ 205 # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */ 206 # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */ 207 # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */ 208 # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */ 209 #endif 210 211 212 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__ 213 /* Flags for SYNC_FILE_RANGE. */ 214 # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages 215 in the range before performing the 216 write. */ 217 # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those 218 dirty pages in the range which are 219 not presently under writeback. */ 220 # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in 221 the range after performing the 222 write. */ 223 224 /* Flags for SPLICE and VMSPLICE. */ 225 # define SPLICE_F_MOVE 1 /* Move pages instead of copying. */ 226 # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing 227 (but we may still block on the fd 228 we splice from/to). */ 229 # define SPLICE_F_MORE 4 /* Expect more data. */ 230 # define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */ 231 #endif 232 233 __BEGIN_DECLS 234 235 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__ 236 237 /* Provide kernel hint to read ahead. */ 238 extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count) 239 __THROW; 240 241 242 /* Selective file content synch'ing. */ 243 extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to, 244 unsigned int __flags); 245 246 /* Splice address range into a pipe. */ 247 extern ssize_t vmsplice (int __fdout, const struct iovec *__iov, 248 size_t __count, unsigned int __flags); 249 250 /* Splice two files together. */ 251 extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout, 252 __off64_t *__offout, size_t __len, 253 unsigned int __flags); 254 255 /* In-kernel implementation of tee for pipe buffers. */ 256 extern ssize_t tee (int __fdin, int __fdout, size_t __len, 257 unsigned int __flags); 258 259 #endif 260 __END_DECLS 261 262 /* Include generic Linux declarations. */ 263 #include <bits/fcntl-linux.h> 264