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, 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 of socket (receiver of SIGIO). */ 103 # define F_GETOWN 9 /* Set owner of socket (receiver of 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 #endif 110 111 #ifdef __USE_GNU 112 # define F_SETLEASE 1024 /* Set a lease. */ 113 # define F_GETLEASE 1025 /* Enquire what lease is active. */ 114 # define F_NOTIFY 1026 /* Request notfications on a directory. */ 115 # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with 116 close-on-exit set. */ 117 #endif 118 119 /* For F_[GET|SET]FD. */ 120 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */ 121 122 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */ 123 #define F_RDLCK 0 /* Read lock. */ 124 #define F_WRLCK 1 /* Write lock. */ 125 #define F_UNLCK 2 /* Remove lock. */ 126 127 /* For old implementation of bsd flock(). */ 128 #define F_EXLCK 4 /* or 3 */ 129 #define F_SHLCK 8 /* or 4 */ 130 131 #ifdef __USE_BSD 132 /* Operations for bsd flock(), also used by the kernel implementation. */ 133 # define LOCK_SH 1 /* shared lock */ 134 # define LOCK_EX 2 /* exclusive lock */ 135 # define LOCK_NB 4 /* or'd with one of the above to prevent 136 blocking */ 137 # define LOCK_UN 8 /* remove lock */ 138 #endif 139 140 #ifdef __USE_GNU 141 # define LOCK_MAND 32 /* This is a mandatory flock: */ 142 # define LOCK_READ 64 /* ... which allows concurrent read operations. */ 143 # define LOCK_WRITE 128 /* ... which allows concurrent write operations. */ 144 # define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */ 145 #endif 146 147 #ifdef __USE_GNU 148 /* Types of directory notifications that may be requested with F_NOTIFY. */ 149 # define DN_ACCESS 0x00000001 /* File accessed. */ 150 # define DN_MODIFY 0x00000002 /* File modified. */ 151 # define DN_CREATE 0x00000004 /* File created. */ 152 # define DN_DELETE 0x00000008 /* File removed. */ 153 # define DN_RENAME 0x00000010 /* File renamed. */ 154 # define DN_ATTRIB 0x00000020 /* File changed attibutes. */ 155 # define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */ 156 #endif 157 158 struct flock 159 { 160 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 161 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 162 #ifndef __USE_FILE_OFFSET64 163 __off_t l_start; /* Offset where the lock begins. */ 164 __off_t l_len; /* Size of the locked area; zero means until EOF. */ 165 #else 166 __off64_t l_start; /* Offset where the lock begins. */ 167 __off64_t l_len; /* Size of the locked area; zero means until EOF. */ 168 #endif 169 __pid_t l_pid; /* Process holding the lock. */ 170 }; 171 172 #ifdef __USE_LARGEFILE64 173 struct flock64 174 { 175 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 176 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 177 __off64_t l_start; /* Offset where the lock begins. */ 178 __off64_t l_len; /* Size of the locked area; zero means until EOF. */ 179 __pid_t l_pid; /* Process holding the lock. */ 180 }; 181 #endif 182 183 /* Define some more compatibility macros to be backward compatible with 184 BSD systems which did not managed to hide these kernel macros. */ 185 #ifdef __USE_BSD 186 # define FAPPEND O_APPEND 187 # define FFSYNC O_FSYNC 188 # define FASYNC O_ASYNC 189 # define FNONBLOCK O_NONBLOCK 190 # define FNDELAY O_NDELAY 191 #endif /* Use BSD. */ 192 193 /* Advise to `posix_fadvise'. */ 194 #ifdef __USE_XOPEN2K 195 # define POSIX_FADV_NORMAL 0 /* No further special treatment. */ 196 # define POSIX_FADV_RANDOM 1 /* Expect random page references. */ 197 # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */ 198 # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */ 199 # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */ 200 # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */ 201 #endif 202 203 204 #ifdef __USE_GNU 205 /* Flags for SYNC_FILE_RANGE. */ 206 # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages 207 in the range before performing the 208 write. */ 209 # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those 210 dirty pages in the range which are 211 not presently under writeback. */ 212 # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in 213 the range after performing the 214 write. */ 215 216 /* Flags for SPLICE and VMSPLICE. */ 217 # define SPLICE_F_MOVE 1 /* Move pages instead of copying. */ 218 # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing 219 (but we may still block on the fd 220 we splice from/to). */ 221 # define SPLICE_F_MORE 4 /* Expect more data. */ 222 # define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */ 223 #endif 224 225 __BEGIN_DECLS 226 227 #ifdef __USE_GNU 228 229 /* Provide kernel hint to read ahead. */ 230 extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count) 231 __THROW; 232 233 234 /* Selective file content synch'ing. */ 235 extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to, 236 unsigned int __flags); 237 238 239 /* Splice address range into a pipe. */ 240 extern ssize_t vmsplice (int __fdout, const struct iovec *__iov, 241 size_t __count, unsigned int __flags); 242 243 /* Splice two files together. */ 244 extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout, 245 __off64_t *__offout, size_t __len, 246 unsigned int __flags); 247 248 /* In-kernel implementation of tee for pipe buffers. */ 249 extern ssize_t tee (int __fdin, int __fdout, size_t __len, 250 unsigned int __flags); 251 252 #endif 253 254 __END_DECLS 255
