1 /* O_*, F_*, FD_* bit values for Linux/x86-64. 2 Copyright (C) 2001,2002,2004,2006,2007,2009 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, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20 #ifndef _FCNTL_H 21 # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead." 22 #endif 23 24 #include <sys/types.h> 25 #include <bits/wordsize.h> 26 #ifdef __USE_GNU 27 # include <bits/uio.h> 28 #endif 29 30 31 /* open/fcntl - O_SYNC is only implemented on blocks devices and on files 32 located on an ext2 file system */ 33 #define O_ACCMODE 0003 34 #define O_RDONLY 00 35 #define O_WRONLY 01 36 #define O_RDWR 02 37 #define O_CREAT 0100 /* not fcntl */ 38 #define O_EXCL 0200 /* not fcntl */ 39 #define O_NOCTTY 0400 /* not fcntl */ 40 #define O_TRUNC 01000 /* not fcntl */ 41 #define O_APPEND 02000 42 #define O_NONBLOCK 04000 43 #define O_NDELAY O_NONBLOCK 44 #define O_SYNC 010000 45 #define O_FSYNC O_SYNC 46 #define O_ASYNC 020000 47 48 #ifdef __USE_GNU 49 # define O_DIRECT 040000 /* Direct disk access. */ 50 # define O_DIRECTORY 0200000 /* Must be a directory. */ 51 # define O_NOFOLLOW 0400000 /* Do not follow links. */ 52 # define O_NOATIME 01000000 /* Do not set atime. */ 53 # define O_CLOEXEC 02000000 /* Set close_on_exec. */ 54 #endif 55 56 /* For now Linux has synchronisity options for data and read operations. 57 We define the symbols here but let them do the same as O_SYNC since 58 this is a superset. */ 59 #if defined __USE_POSIX199309 || defined __USE_UNIX98 60 # define O_DSYNC O_SYNC /* Synchronize data. */ 61 # define O_RSYNC O_SYNC /* Synchronize read operations. */ 62 #endif 63 64 #ifdef __USE_LARGEFILE64 65 # if __WORDSIZE == 64 66 # define O_LARGEFILE 0 67 # else 68 # define O_LARGEFILE 0100000 69 # endif 70 #endif 71 72 /* Values for the second argument to `fcntl'. */ 73 #define F_DUPFD 0 /* Duplicate file descriptor. */ 74 #define F_GETFD 1 /* Get file descriptor flags. */ 75 #define F_SETFD 2 /* Set file descriptor flags. */ 76 #define F_GETFL 3 /* Get file status flags. */ 77 #define F_SETFL 4 /* Set file status flags. */ 78 #if __WORDSIZE == 64 79 # define F_GETLK 5 /* Get record locking info. */ 80 # define F_SETLK 6 /* Set record locking info (non-blocking). */ 81 # define F_SETLKW 7 /* Set record locking info (blocking). */ 82 /* Not necessary, we always have 64-bit offsets. */ 83 # define F_GETLK64 5 /* Get record locking info. */ 84 # define F_SETLK64 6 /* Set record locking info (non-blocking). */ 85 # define F_SETLKW64 7 /* Set record locking info (blocking). */ 86 #else 87 # ifndef __USE_FILE_OFFSET64 88 # define F_GETLK 5 /* Get record locking info. */ 89 # define F_SETLK 6 /* Set record locking info (non-blocking). */ 90 # define F_SETLKW 7 /* Set record locking info (blocking). */ 91 # else 92 # define F_GETLK F_GETLK64 /* Get record locking info. */ 93 # define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/ 94 # define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */ 95 # endif 96 # define F_GETLK64 12 /* Get record locking info. */ 97 # define F_SETLK64 13 /* Set record locking info (non-blocking). */ 98 # define F_SETLKW64 14 /* Set record locking info (blocking). */ 99 #endif 100 101 #if defined __USE_BSD || defined __USE_UNIX98 102 # define F_SETOWN 8 /* Get owner (process receiving SIGIO). */ 103 # define F_GETOWN 9 /* Set owner (process receiving SIGIO). */ 104 #endif 105 106 #ifdef __USE_GNU 107 # define F_SETSIG 10 /* Set number of signal to be sent. */ 108 # define F_GETSIG 11 /* Get number of signal to be sent. */ 109 # define F_SETOWN_EX 15 /* Get owner (thread receiving SIGIO). */ 110 # define F_GETOWN_EX 16 /* Set owner (thread receiving SIGIO). */ 111 #endif 112 113 #ifdef __USE_GNU 114 # define F_SETLEASE 1024 /* Set a lease. */ 115 # define F_GETLEASE 1025 /* Enquire what lease is active. */ 116 # define F_NOTIFY 1026 /* Request notfications on a directory. */ 117 # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with 118 close-on-exit set. */ 119 #endif 120 121 /* For F_[GET|SET]FD. */ 122 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */ 123 124 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */ 125 #define F_RDLCK 0 /* Read lock. */ 126 #define F_WRLCK 1 /* Write lock. */ 127 #define F_UNLCK 2 /* Remove lock. */ 128 129 /* For old implementation of bsd flock(). */ 130 #define F_EXLCK 4 /* or 3 */ 131 #define F_SHLCK 8 /* or 4 */ 132 133 #ifdef __USE_BSD 134 /* Operations for bsd flock(), also used by the kernel implementation. */ 135 # define LOCK_SH 1 /* shared lock */ 136 # define LOCK_EX 2 /* exclusive lock */ 137 # define LOCK_NB 4 /* or'd with one of the above to prevent 138 blocking */ 139 # define LOCK_UN 8 /* remove lock */ 140 #endif 141 142 #ifdef __USE_GNU 143 # define LOCK_MAND 32 /* This is a mandatory flock: */ 144 # define LOCK_READ 64 /* ... which allows concurrent read operations. */ 145 # define LOCK_WRITE 128 /* ... which allows concurrent write operations. */ 146 # define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */ 147 #endif 148 149 #ifdef __USE_GNU 150 /* Types of directory notifications that may be requested with F_NOTIFY. */ 151 # define DN_ACCESS 0x00000001 /* File accessed. */ 152 # define DN_MODIFY 0x00000002 /* File modified. */ 153 # define DN_CREATE 0x00000004 /* File created. */ 154 # define DN_DELETE 0x00000008 /* File removed. */ 155 # define DN_RENAME 0x00000010 /* File renamed. */ 156 # define DN_ATTRIB 0x00000020 /* File changed attibutes. */ 157 # define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */ 158 #endif 159 160 struct flock 161 { 162 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 163 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 164 #ifndef __USE_FILE_OFFSET64 165 __off_t l_start; /* Offset where the lock begins. */ 166 __off_t l_len; /* Size of the locked area; zero means until EOF. */ 167 #else 168 __off64_t l_start; /* Offset where the lock begins. */ 169 __off64_t l_len; /* Size of the locked area; zero means until EOF. */ 170 #endif 171 __pid_t l_pid; /* Process holding the lock. */ 172 }; 173 174 #ifdef __USE_LARGEFILE64 175 struct flock64 176 { 177 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 178 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 179 __off64_t l_start; /* Offset where the lock begins. */ 180 __off64_t l_len; /* Size of the locked area; zero means until EOF. */ 181 __pid_t l_pid; /* Process holding the lock. */ 182 }; 183 #endif 184 185 #ifdef __USE_GNU 186 /* Owner types. */ 187 enum __pid_type 188 { 189 F_OWNER_TID = 0, /* Kernel thread. */ 190 F_OWNER_PID, /* Process. */ 191 F_OWNER_GID /* Process group. */ 192 }; 193 194 /* Structure to use with F_GETOWN_EX and F_SETOWN_EX. */ 195 struct f_owner_ex 196 { 197 enum __pid_type type; /* Owner type of ID. */ 198 __pid_t pid; /* ID of owner. */ 199 }; 200 #endif 201 202 /* Define some more compatibility macros to be backward compatible with 203 BSD systems which did not managed to hide these kernel macros. */ 204 #ifdef __USE_BSD 205 # define FAPPEND O_APPEND 206 # define FFSYNC O_FSYNC 207 # define FASYNC O_ASYNC 208 # define FNONBLOCK O_NONBLOCK 209 # define FNDELAY O_NDELAY 210 #endif /* Use BSD. */ 211 212 /* Advise to `posix_fadvise'. */ 213 #ifdef __USE_XOPEN2K 214 # define POSIX_FADV_NORMAL 0 /* No further special treatment. */ 215 # define POSIX_FADV_RANDOM 1 /* Expect random page references. */ 216 # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */ 217 # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */ 218 # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */ 219 # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */ 220 #endif 221 222 223 #ifdef __USE_GNU 224 /* Flags for SYNC_FILE_RANGE. */ 225 # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages 226 in the range before performing the 227 write. */ 228 # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those 229 dirty pages in the range which are 230 not presently under writeback. */ 231 # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in 232 the range after performing the 233 write. */ 234 235 /* Flags for SPLICE and VMSPLICE. */ 236 # define SPLICE_F_MOVE 1 /* Move pages instead of copying. */ 237 # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing 238 (but we may still block on the fd 239 we splice from/to). */ 240 # define SPLICE_F_MORE 4 /* Expect more data. */ 241 # define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */ 242 #endif 243 244 /* Values for `*at' functions. */ 245 #ifdef __USE_ATFILE 246 # define AT_FDCWD -100 /* Special value used to indicate 247 the *at functions should use the 248 current working directory. */ 249 # define AT_SYMLINK_NOFOLLOW 0x100 /* Do not follow symbolic links. */ 250 # define AT_REMOVEDIR 0x200 /* Remove directory instead of 251 unlinking file. */ 252 # define AT_SYMLINK_FOLLOW 0x400 /* Follow symbolic links. */ 253 # define AT_EACCESS 0x200 /* Test access permitted for 254 effective IDs, not real IDs. */ 255 #endif 256 257 __BEGIN_DECLS 258 259 #ifdef __USE_GNU 260 261 /* Provide kernel hint to read ahead. */ 262 extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count) 263 __THROW; 264 265 266 /* Selective file content synch'ing. */ 267 extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to, 268 unsigned int __flags); 269 270 271 /* Splice address range into a pipe. */ 272 extern ssize_t vmsplice (int __fdout, const struct iovec *__iov, 273 size_t __count, unsigned int __flags); 274 275 /* Splice two files together. */ 276 extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout, 277 __off64_t *__offout, size_t __len, 278 unsigned int __flags); 279 280 /* In-kernel implementation of tee for pipe buffers. */ 281 extern ssize_t tee (int __fdin, int __fdout, size_t __len, 282 unsigned int __flags); 283 284 /* Reserve storage for the data of the file associated with FD. */ 285 # ifndef __USE_FILE_OFFSET64 286 extern int fallocate (int __fd, int __mode, __off_t __offset, __off_t __len); 287 # else 288 # ifdef __REDIRECT 289 extern int __REDIRECT (fallocate, (int __fd, int __mode, __off64_t __offset, 290 __off64_t __len), 291 fallocate64); 292 # else 293 # define fallocate fallocate64 294 # endif 295 # endif 296 # ifdef __USE_LARGEFILE64 297 extern int fallocate64 (int __fd, int __mode, __off64_t __offset, 298 __off64_t __len); 299 # endif 300 #endif 301 302 __END_DECLS 303
