1 /* O_*, F_*, FD_* bit values for Linux. 2 Copyright (C) 1995-1998, 2000 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; see the file COPYING.LIB. If 17 not, see <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 24 #include <sys/types.h> 25 #ifdef __USE_GNU 26 # include <bits/uio.h> 27 #endif 28 29 /* open/fcntl - O_SYNC is only implemented on blocks devices and on files 30 located on an ext2 file system */ 31 #define O_ACCMODE 0003 32 #define O_RDONLY 00 33 #define O_WRONLY 01 34 #define O_RDWR 02 35 #define O_CREAT 0100 /* not fcntl */ 36 #define O_EXCL 0200 /* not fcntl */ 37 #define O_NOCTTY 0400 /* not fcntl */ 38 #define O_TRUNC 01000 /* not fcntl */ 39 #define O_APPEND 02000 40 #define O_NONBLOCK 04000 41 #define O_NDELAY O_NONBLOCK 42 #define O_SYNC 010000 43 #define O_FSYNC O_SYNC 44 #define O_ASYNC 020000 45 46 #ifdef __USE_XOPEN2K8 47 # define O_DIRECTORY 0200000 /* Must be a directory. */ 48 # define O_NOFOLLOW 0400000 /* Do not follow links. */ 49 # define O_CLOEXEC 02000000 /* Set close_on_exec. */ 50 #endif 51 52 #ifdef __USE_GNU 53 # define O_DIRECT 040000 /* Direct disk access. */ 54 # define O_NOATIME 01000000 /* Do not set atime. */ 55 # define O_PATH 010000000 /* Resolve pathname but do not open file. */ 56 # define O_TMPFILE 020200000 /* Atomically create nameless file. */ 57 #endif 58 59 #ifdef __USE_LARGEFILE64 60 # define O_LARGEFILE 0100000 61 #endif 62 63 /* For now Linux has synchronisity options for data and read operations. 64 We define the symbols here but let them do the same as O_SYNC since 65 this is a superset. */ 66 #if defined __USE_POSIX199309 || defined __USE_UNIX98 67 # define O_DSYNC O_SYNC /* Synchronize data. */ 68 # define O_RSYNC O_SYNC /* Synchronize read operations. */ 69 #endif 70 71 /* Values for the second argument to `fcntl'. */ 72 #define F_DUPFD 0 /* Duplicate file descriptor. */ 73 #define F_GETFD 1 /* Get file descriptor flags. */ 74 #define F_SETFD 2 /* Set file descriptor flags. */ 75 #define F_GETFL 3 /* Get file status flags. */ 76 #define F_SETFL 4 /* Set file status flags. */ 77 78 #ifndef __USE_FILE_OFFSET64 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 #else 83 # define F_GETLK F_GETLK64 /* Get record locking info. */ 84 # define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/ 85 # define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */ 86 #endif 87 88 #define F_GETLK64 12 /* Get record locking info. */ 89 #define F_SETLK64 13 /* Set record locking info (non-blocking). */ 90 #define F_SETLKW64 14 /* Set record locking info (blocking). */ 91 92 #if defined __USE_BSD || defined __USE_XOPEN2K 93 # define F_SETOWN 8 /* Get owner of socket (receiver of SIGIO). */ 94 # define F_GETOWN 9 /* Set owner of socket (receiver of SIGIO). */ 95 #endif 96 97 #ifdef __USE_GNU 98 # define F_SETSIG 10 /* Set number of signal to be sent. */ 99 # define F_GETSIG 11 /* Get number of signal to be sent. */ 100 #endif 101 102 #ifdef __USE_GNU 103 # define F_SETLEASE 1024 /* Set a lease. */ 104 # define F_GETLEASE 1025 /* Enquire what lease is active. */ 105 # define F_NOTIFY 1026 /* Request notfications on a directory. */ 106 # define F_SETPIPE_SZ 1031 /* Set pipe page size array. */ 107 # define F_GETPIPE_SZ 1032 /* Get pipe page size array. */ 108 #endif 109 #if defined __USE_XOPEN2K8 || defined __USE_GNU 110 # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with 111 close-on-exit set on new fd. */ 112 #endif 113 114 /* For F_[GET|SET]FL. */ 115 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */ 116 117 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */ 118 #define F_RDLCK 0 /* Read lock. */ 119 #define F_WRLCK 1 /* Write lock. */ 120 #define F_UNLCK 2 /* Remove lock. */ 121 122 /* for old implementation of bsd flock () */ 123 #define F_EXLCK 4 /* or 3 */ 124 #define F_SHLCK 8 /* or 4 */ 125 126 #ifdef __USE_BSD 127 /* Operations for bsd flock(), also used by the kernel implementation */ 128 # define LOCK_SH 1 /* shared lock */ 129 # define LOCK_EX 2 /* exclusive lock */ 130 # define LOCK_NB 4 /* or'd with one of the above to prevent 131 blocking */ 132 # define LOCK_UN 8 /* remove lock */ 133 #endif 134 135 #ifdef __USE_GNU 136 # define LOCK_MAND 32 /* This is a mandatory flock: */ 137 # define LOCK_READ 64 /* ... which allows concurrent read operations. */ 138 # define LOCK_WRITE 128 /* ... which allows concurrent write operations. */ 139 # define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */ 140 #endif 141 142 #ifdef __USE_GNU 143 /* Types of directory notifications that may be requested with F_NOTIFY. */ 144 # define DN_ACCESS 0x00000001 /* File accessed. */ 145 # define DN_MODIFY 0x00000002 /* File modified. */ 146 # define DN_CREATE 0x00000004 /* File created. */ 147 # define DN_DELETE 0x00000008 /* File removed. */ 148 # define DN_RENAME 0x00000010 /* File renamed. */ 149 # define DN_ATTRIB 0x00000020 /* File changed attibutes. */ 150 # define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */ 151 #endif 152 153 struct flock 154 { 155 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 156 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 157 #ifndef __USE_FILE_OFFSET64 158 __off_t l_start; /* Offset where the lock begins. */ 159 __off_t l_len; /* Size of the locked area; zero means until EOF. */ 160 #else 161 __off64_t l_start; /* Offset where the lock begins. */ 162 __off64_t l_len; /* Size of the locked area; zero means until EOF. */ 163 #endif 164 __pid_t l_pid; /* Process holding the lock. */ 165 }; 166 167 #ifdef __USE_LARGEFILE64 168 struct flock64 169 { 170 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 171 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 172 __off64_t l_start; /* Offset where the lock begins. */ 173 __off64_t l_len; /* Size of the locked area; zero means until EOF. */ 174 __pid_t l_pid; /* Process holding the lock. */ 175 }; 176 #endif 177 178 /* Define some more compatibility macros to be backward compatible with 179 BSD systems which did not managed to hide these kernel macros. */ 180 #ifdef __USE_BSD 181 # define FAPPEND O_APPEND 182 # define FFSYNC O_FSYNC 183 # define FASYNC O_ASYNC 184 # define FNONBLOCK O_NONBLOCK 185 # define FNDELAY O_NDELAY 186 #endif /* Use BSD. */ 187 188 /* Advise to `posix_fadvise'. */ 189 #ifdef __USE_XOPEN2K 190 # define POSIX_FADV_NORMAL 0 /* No further special treatment. */ 191 # define POSIX_FADV_RANDOM 1 /* Expect random page references. */ 192 # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */ 193 # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */ 194 # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */ 195 # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */ 196 #endif 197 198 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__ 199 /* Flags for SYNC_FILE_RANGE. */ 200 # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages 201 in the range before performing the 202 write. */ 203 # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those 204 dirty pages in the range which are 205 not presently under writeback. */ 206 # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in 207 the range after performing the 208 write. */ 209 210 /* Flags for SPLICE and VMSPLICE. */ 211 # define SPLICE_F_MOVE 1 /* Move pages instead of copying. */ 212 # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing 213 (but we may still block on the fd 214 we splice from/to). */ 215 # define SPLICE_F_MORE 4 /* Expect more data. */ 216 # define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */ 217 #endif 218 219 __BEGIN_DECLS 220 221 #if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__ 222 223 /* Provide kernel hint to read ahead. */ 224 extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count) 225 __THROW; 226 227 228 /* Selective file content synch'ing. */ 229 extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to, 230 unsigned int __flags); 231 232 /* Splice address range into a pipe. */ 233 extern ssize_t vmsplice (int __fdout, const struct iovec *__iov, 234 size_t __count, unsigned int __flags); 235 236 /* Splice two files together. */ 237 extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout, 238 __off64_t *__offout, size_t __len, 239 unsigned int __flags); 240 241 /* In-kernel implementation of tee for pipe buffers. */ 242 extern ssize_t tee (int __fdin, int __fdout, size_t __len, 243 unsigned int __flags); 244 245 #endif 246 __END_DECLS 247 248 /* Include generic Linux declarations. */ 249 #include <bits/fcntl-linux.h> 250