1 /* O_*, F_*, FD_* bit values for Linux. 2 Copyright (C) 1995, 1996, 1997, 1998, 2000, 2002, 2003, 2004, 2006, 2007 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, write to the Free 18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 19 02111-1307 USA. */ 20 21 #ifndef _FCNTL_H 22 # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead." 23 #endif 24 25 #include <sgidefs.h> 26 #include <sys/types.h> 27 #ifdef __USE_GNU 28 # include <bits/uio.h> 29 #endif 30 31 32 /* open/fcntl - O_SYNC is only implemented on blocks devices and on files 33 located on an ext2 file system */ 34 #define O_ACCMODE 0003 35 #define O_RDONLY 00 36 #define O_WRONLY 01 37 #define O_RDWR 02 38 #define O_APPEND 0x0008 39 #define O_SYNC 0x0010 40 #define O_NONBLOCK 0x0080 41 #define O_NDELAY O_NONBLOCK 42 #define O_CREAT 0x0100 /* not fcntl */ 43 #define O_TRUNC 0x0200 /* not fcntl */ 44 #define O_EXCL 0x0400 /* not fcntl */ 45 #define O_NOCTTY 0x0800 /* not fcntl */ 46 #define O_FSYNC O_SYNC 47 #define O_ASYNC 0x1000 48 49 #ifdef __USE_GNU 50 # define O_NOFOLLOW 0x20000 /* Do not follow links. */ 51 # define O_DIRECT 0x8000 /* Direct disk access hint. */ 52 # define O_DIRECTORY 0x10000 /* Must be a directory. */ 53 # define O_NOATIME 0x40000 /* Do not set atime. */ 54 # define O_CLOEXEC 02000000 /* Set close_on_exec. */ 55 #endif 56 57 /* For now Linux has no synchronisity options for data and read operations. 58 We define the symbols here but let them do the same as O_SYNC since 59 this is a superset. */ 60 #if defined __USE_POSIX199309 || defined __USE_UNIX98 61 # define O_DSYNC O_SYNC /* Synchronize data. */ 62 # define O_RSYNC O_SYNC /* Synchronize read operations. */ 63 #endif 64 65 #ifdef __USE_LARGEFILE64 66 # define O_LARGEFILE 0x2000 /* Allow large file opens. */ 67 #endif 68 69 /* Values for the second argument to `fcntl'. */ 70 #define F_DUPFD 0 /* Duplicate file descriptor. */ 71 #define F_GETFD 1 /* Get file descriptor flags. */ 72 #define F_SETFD 2 /* Set file descriptor flags. */ 73 #define F_GETFL 3 /* Get file status flags. */ 74 #define F_SETFL 4 /* Set file status flags. */ 75 #ifndef __USE_FILE_OFFSET64 76 # define F_GETLK 14 /* Get record locking info. */ 77 # define F_SETLK 6 /* Set record locking info (non-blocking). */ 78 # define F_SETLKW 7 /* Set record locking info (blocking). */ 79 #else 80 # define F_GETLK F_GETLK64 /* Get record locking info. */ 81 # define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/ 82 # define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */ 83 #endif 84 85 #define F_GETLK64 33 /* Get record locking info. */ 86 #define F_SETLK64 34 /* Set record locking info (non-blocking). */ 87 #define F_SETLKW64 35 /* Set record locking info (blocking). */ 88 89 #if defined __USE_BSD || defined __USE_UNIX98 90 # define F_SETOWN 24 /* Get owner of socket (receiver of SIGIO). */ 91 # define F_GETOWN 23 /* Set owner of socket (receiver of SIGIO). */ 92 #endif 93 94 #ifdef __USE_GNU 95 # define F_SETSIG 10 /* Set number of signal to be sent. */ 96 # define F_GETSIG 11 /* Get number of signal to be sent. */ 97 #endif 98 99 #ifdef __USE_GNU 100 # define F_SETLEASE 1024 /* Set a lease. */ 101 # define F_GETLEASE 1025 /* Enquire what lease is active. */ 102 # define F_NOTIFY 1026 /* Request notfications on a directory. */ 103 # define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with 104 close-on-exit set. */ 105 #endif 106 107 /* For F_[GET|SET]FD. */ 108 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */ 109 110 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */ 111 #define F_RDLCK 0 /* Read lock. */ 112 #define F_WRLCK 1 /* Write lock. */ 113 #define F_UNLCK 2 /* Remove lock. */ 114 115 /* For old implementation of bsd flock(). */ 116 #define F_EXLCK 4 /* or 3 */ 117 #define F_SHLCK 8 /* or 4 */ 118 119 #ifdef __USE_BSD 120 /* Operations for bsd flock(), also used by the kernel implementation. */ 121 # define LOCK_SH 1 /* shared lock */ 122 # define LOCK_EX 2 /* exclusive lock */ 123 # define LOCK_NB 4 /* or'd with one of the above to prevent 124 blocking */ 125 # define LOCK_UN 8 /* remove lock */ 126 #endif 127 128 #ifdef __USE_GNU 129 # define LOCK_MAND 32 /* This is a mandatory flock: */ 130 # define LOCK_READ 64 /* ... which allows concurrent read operations. */ 131 # define LOCK_WRITE 128 /* ... which allows concurrent write operations. */ 132 # define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */ 133 #endif 134 135 #ifdef __USE_GNU 136 /* Types of directory notifications that may be requested with F_NOTIFY. */ 137 # define DN_ACCESS 0x00000001 /* File accessed. */ 138 # define DN_MODIFY 0x00000002 /* File modified. */ 139 # define DN_CREATE 0x00000004 /* File created. */ 140 # define DN_DELETE 0x00000008 /* File removed. */ 141 # define DN_RENAME 0x00000010 /* File renamed. */ 142 # define DN_ATTRIB 0x00000020 /* File changed attibutes. */ 143 # define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */ 144 #endif 145 146 struct flock 147 { 148 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 149 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 150 #ifndef __USE_FILE_OFFSET64 151 __off_t l_start; /* Offset where the lock begins. */ 152 __off_t l_len; /* Size of the locked area; zero means until EOF. */ 153 #if _MIPS_SIM != _ABI64 154 /* The 64-bit flock structure, used by the n64 ABI, and for 64-bit 155 fcntls in o32 and n32, never has this field. */ 156 long int l_sysid; 157 #endif 158 #else 159 __off64_t l_start; /* Offset where the lock begins. */ 160 __off64_t l_len; /* Size of the locked area; zero means until EOF. */ 161 #endif 162 __pid_t l_pid; /* Process holding the lock. */ 163 #if ! defined __USE_FILE_OFFSET64 && _MIPS_SIM != _ABI64 164 /* The 64-bit flock structure, used by the n64 ABI, and for 64-bit 165 flock in o32 and n32, never has this field. */ 166 long int pad[4]; 167 #endif 168 }; 169 typedef struct flock flock_t; 170 171 #ifdef __USE_LARGEFILE64 172 struct flock64 173 { 174 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 175 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 176 __off64_t l_start; /* Offset where the lock begins. */ 177 __off64_t l_len; /* Size of the locked area; zero means until EOF. */ 178 __pid_t l_pid; /* Process holding the lock. */ 179 }; 180 #endif 181 182 /* Define some more compatibility macros to be backward compatible with 183 BSD systems which did not managed to hide these kernel macros. */ 184 #ifdef __USE_BSD 185 # define FAPPEND O_APPEND 186 # define FFSYNC O_FSYNC 187 # define FASYNC O_ASYNC 188 # define FNONBLOCK O_NONBLOCK 189 # define FNDELAY O_NDELAY 190 #endif /* Use BSD. */ 191 192 /* Advise to `posix_fadvise'. */ 193 #ifdef __USE_XOPEN2K 194 # define POSIX_FADV_NORMAL 0 /* No further special treatment. */ 195 # define POSIX_FADV_RANDOM 1 /* Expect random page references. */ 196 # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */ 197 # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */ 198 # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */ 199 # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */ 200 #endif 201 202 203 #ifdef __USE_GNU 204 /* Flags for SYNC_FILE_RANGE. */ 205 # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages 206 in the range before performing the 207 write. */ 208 # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those 209 dirty pages in the range which are 210 not presently under writeback. */ 211 # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in 212 the range after performing the 213 write. */ 214 215 /* Flags for SPLICE and VMSPLICE. */ 216 # define SPLICE_F_MOVE 1 /* Move pages instead of copying. */ 217 # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing 218 (but we may still block on the fd 219 we splice from/to). */ 220 # define SPLICE_F_MORE 4 /* Expect more data. */ 221 # define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */ 222 #endif 223 224 __BEGIN_DECLS 225 226 #ifdef __USE_GNU 227 228 /* Provide kernel hint to read ahead. */ 229 extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count) 230 __THROW; 231 232 233 /* Selective file content synch'ing. */ 234 extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to, 235 unsigned int __flags); 236 237 238 /* Splice address range into a pipe. */ 239 extern ssize_t vmsplice (int __fdout, const struct iovec *__iov, 240 size_t __count, unsigned int __flags); 241 242 /* Splice two files together. */ 243 extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout, 244 __off64_t *__offout, size_t __len, 245 unsigned int __flags); 246 247 /* In-kernel implementation of tee for pipe buffers. */ 248 extern ssize_t tee (int __fdin, int __fdout, size_t __len, 249 unsigned int __flags); 250 251 #endif 252 253 __END_DECLS 254