1 /* O_*, F_*, FD_* bit values for Linux. 2 Copyright (C) 1995, 1996, 1997, 1998, 2000, 2002, 2003, 2004, 2006 3 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2.1 of the License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with the GNU C Library; if not, see 18 <http://www.gnu.org/licenses/>. */ 19 20 #ifndef _FCNTL_H 21 # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead." 22 #endif 23 24 #include <sgidefs.h> 25 #include <sys/types.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_APPEND 0x0008 38 #define O_SYNC 0x0010 39 #define O_NONBLOCK 0x0080 40 #define O_NDELAY O_NONBLOCK 41 #define O_CREAT 0x0100 /* not fcntl */ 42 #define O_TRUNC 0x0200 /* not fcntl */ 43 #define O_EXCL 0x0400 /* not fcntl */ 44 #define O_NOCTTY 0x0800 /* not fcntl */ 45 #define O_FSYNC O_SYNC 46 #define O_ASYNC 0x1000 47 48 #ifdef __USE_XOPEN2K8 49 # define O_NOFOLLOW 0x20000 /* Do not follow links. */ 50 # define O_DIRECTORY 0x10000 /* Must be a directory. */ 51 # define O_CLOEXEC 02000000 /* set close_on_exec */ 52 #endif 53 54 #ifdef __USE_GNU 55 # define O_DIRECT 0x8000 /* Direct disk access hint. */ 56 # define O_NOATIME 0x40000 /* Do not set atime. */ 57 # define O_PATH 010000000 /* Resolve pathname but do not open file. */ 58 # define O_TMPFILE 0x410000 /* Atomically create nameless file. */ 59 #endif 60 61 /* For now Linux has no synchronisity options for data and read operations. 62 We define the symbols here but let them do the same as O_SYNC since 63 this is a superset. */ 64 #if defined __USE_POSIX199309 || defined __USE_UNIX98 65 # define O_DSYNC O_SYNC /* Synchronize data. */ 66 # define O_RSYNC O_SYNC /* Synchronize read operations. */ 67 #endif 68 69 #ifdef __USE_LARGEFILE64 70 # if __WORDSIZE == 64 71 # define O_LARGEFILE 0 72 # else 73 # define O_LARGEFILE 0x2000 /* Allow large file opens. */ 74 # endif 75 #endif 76 77 /* Values for the second argument to `fcntl'. */ 78 #define F_DUPFD 0 /* Duplicate file descriptor. */ 79 #define F_GETFD 1 /* Get file descriptor flags. */ 80 #define F_SETFD 2 /* Set file descriptor flags. */ 81 #define F_GETFL 3 /* Get file status flags. */ 82 #define F_SETFL 4 /* Set file status flags. */ 83 #ifndef __USE_FILE_OFFSET64 84 # define F_GETLK 14 /* Get record locking info. */ 85 # define F_SETLK 6 /* Set record locking info (non-blocking). */ 86 # define F_SETLKW 7 /* Set record locking info (blocking). */ 87 #else 88 # define F_GETLK F_GETLK64 /* Get record locking info. */ 89 # define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/ 90 # define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */ 91 #endif 92 93 #if __WORDSIZE == 64 94 # define F_GETLK64 14 /* Get record locking info. */ 95 # define F_SETLK64 6 /* Set record locking info (non-blocking). */ 96 # define F_SETLKW64 7 /* Set record locking info (blocking). */ 97 #else 98 # define F_GETLK64 33 /* Get record locking info. */ 99 # define F_SETLK64 34 /* Set record locking info (non-blocking). */ 100 # define F_SETLKW64 35 /* Set record locking info (blocking). */ 101 #endif 102 103 #if defined __USE_BSD || defined __USE_UNIX98 104 # define F_SETOWN 24 /* Get owner of socket (receiver of SIGIO). */ 105 # define F_GETOWN 23 /* Set owner of socket (receiver of SIGIO). */ 106 #endif 107 108 #ifdef __USE_GNU 109 # define F_SETSIG 10 /* Set number of signal to be sent. */ 110 # define F_GETSIG 11 /* Get number of signal to be sent. */ 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_SETPIPE_SZ 1031 /* Set pipe page size array. */ 118 # define F_GETPIPE_SZ 1032 /* Get pipe page size array. */ 119 #endif 120 #if defined __USE_XOPEN2K8 || defined __USE_GNU 121 # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with 122 close-on-exit set on new fd. */ 123 #endif 124 125 /* For F_[GET|SET]FL. */ 126 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */ 127 128 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */ 129 #define F_RDLCK 0 /* Read lock. */ 130 #define F_WRLCK 1 /* Write lock. */ 131 #define F_UNLCK 2 /* Remove lock. */ 132 133 /* For old implementation of bsd flock(). */ 134 #define F_EXLCK 4 /* or 3 */ 135 #define F_SHLCK 8 /* or 4 */ 136 137 #ifdef __USE_BSD 138 /* Operations for bsd flock(), also used by the kernel implementation. */ 139 # define LOCK_SH 1 /* shared lock */ 140 # define LOCK_EX 2 /* exclusive lock */ 141 # define LOCK_NB 4 /* or'd with one of the above to prevent 142 blocking */ 143 # define LOCK_UN 8 /* remove lock */ 144 #endif 145 146 #ifdef __USE_GNU 147 # define LOCK_MAND 32 /* This is a mandatory flock: */ 148 # define LOCK_READ 64 /* ... which allows concurrent read operations. */ 149 # define LOCK_WRITE 128 /* ... which allows concurrent write operations. */ 150 # define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */ 151 #endif 152 153 #ifdef __USE_GNU 154 /* Types of directory notifications that may be requested with F_NOTIFY. */ 155 # define DN_ACCESS 0x00000001 /* File accessed. */ 156 # define DN_MODIFY 0x00000002 /* File modified. */ 157 # define DN_CREATE 0x00000004 /* File created. */ 158 # define DN_DELETE 0x00000008 /* File removed. */ 159 # define DN_RENAME 0x00000010 /* File renamed. */ 160 # define DN_ATTRIB 0x00000020 /* File changed attibutes. */ 161 # define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */ 162 #endif 163 164 struct flock 165 { 166 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 167 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 168 #ifndef __USE_FILE_OFFSET64 169 __off_t l_start; /* Offset where the lock begins. */ 170 __off_t l_len; /* Size of the locked area; zero means until EOF. */ 171 #if _MIPS_SIM != _ABI64 172 /* The 64-bit flock structure, used by the n64 ABI, and for 64-bit 173 fcntls in o32 and n32, never has this field. */ 174 long int l_sysid; 175 #endif 176 #else 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 #endif 180 __pid_t l_pid; /* Process holding the lock. */ 181 #if ! defined __USE_FILE_OFFSET64 && _MIPS_SIM != _ABI64 182 /* The 64-bit flock structure, used by the n64 ABI, and for 64-bit 183 flock in o32 and n32, never has this field. */ 184 long int pad[4]; 185 #endif 186 }; 187 typedef struct flock flock_t; 188 189 #ifdef __USE_LARGEFILE64 190 struct flock64 191 { 192 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 193 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 194 __off64_t l_start; /* Offset where the lock begins. */ 195 __off64_t l_len; /* Size of the locked area; zero means until EOF. */ 196 __pid_t l_pid; /* Process holding the lock. */ 197 }; 198 #endif 199 200 /* Define some more compatibility macros to be backward compatible with 201 BSD systems which did not managed to hide these kernel macros. */ 202 #ifdef __USE_BSD 203 # define FAPPEND O_APPEND 204 # define FFSYNC O_FSYNC 205 # define FASYNC O_ASYNC 206 # define FNONBLOCK O_NONBLOCK 207 # define FNDELAY O_NDELAY 208 #endif /* Use BSD. */ 209 210 /* Advise to `posix_fadvise'. */ 211 #ifdef __USE_XOPEN2K 212 # define POSIX_FADV_NORMAL 0 /* No further special treatment. */ 213 # define POSIX_FADV_RANDOM 1 /* Expect random page references. */ 214 # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */ 215 # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */ 216 # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */ 217 # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */ 218 #endif 219 220 221 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__ 222 /* Flags for SYNC_FILE_RANGE. */ 223 # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages 224 in the range before performing the 225 write. */ 226 # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those 227 dirty pages in the range which are 228 not presently under writeback. */ 229 # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in 230 the range after performing the 231 write. */ 232 233 /* Flags for SPLICE and VMSPLICE. */ 234 # define SPLICE_F_MOVE 1 /* Move pages instead of copying. */ 235 # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing 236 (but we may still block on the fd 237 we splice from/to). */ 238 # define SPLICE_F_MORE 4 /* Expect more data. */ 239 # define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */ 240 #endif 241 242 __BEGIN_DECLS 243 244 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__ 245 246 /* Provide kernel hint to read ahead. */ 247 extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count) 248 __THROW; 249 250 251 /* Selective file content synch'ing. */ 252 extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to, 253 unsigned int __flags); 254 255 /* Splice address range into a pipe. */ 256 extern ssize_t vmsplice (int __fdout, const struct iovec *__iov, 257 size_t __count, unsigned int __flags); 258 259 /* Splice two files together. */ 260 extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout, 261 __off64_t *__offout, size_t __len, 262 unsigned int __flags); 263 264 /* In-kernel implementation of tee for pipe buffers. */ 265 extern ssize_t tee (int __fdin, int __fdout, size_t __len, 266 unsigned int __flags); 267 268 #endif 269 __END_DECLS 270 271 /* Include generic Linux declarations. */ 272 #include <bits/fcntl-linux.h> 273