1/* O_*, F_*, FD_* bit values for Linux. 2 Copyright (C) 1995-1998, 2000, 2004, 2006, 2007, 2008 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 <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_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_DIRECTORY 040000 /* Must be a directory. */ 50# define O_NOFOLLOW 0100000 /* Do not follow links. */ 51# define O_DIRECT 0200000 /* Direct disk access. */ 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# define O_LARGEFILE 0400000 66#endif 67 68/* Values for the second argument to `fcntl'. */ 69#define F_DUPFD 0 /* Duplicate file descriptor. */ 70#define F_GETFD 1 /* Get file descriptor flags. */ 71#define F_SETFD 2 /* Set file descriptor flags. */ 72#define F_GETFL 3 /* Get file status flags. */ 73#define F_SETFL 4 /* Set file status flags. */ 74#ifndef __USE_FILE_OFFSET64 75# define F_GETLK 5 /* Get record locking info. */ 76# define F_SETLK 6 /* Set record locking info (non-blocking). */ 77# define F_SETLKW 7 /* Set record locking info (blocking). */ 78#else 79# define F_GETLK F_GETLK64 /* Get record locking info. */ 80# define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/ 81# define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */ 82#endif 83#define F_GETLK64 12 /* Get record locking info. */ 84#define F_SETLK64 13 /* Set record locking info (non-blocking). */ 85#define F_SETLKW64 14 /* Set record locking info (blocking). */ 86 87#if defined __USE_BSD || defined __USE_UNIX98 88# define F_SETOWN 8 /* Get owner of socket (receiver of SIGIO). */ 89# define F_GETOWN 9 /* Set owner of socket (receiver of SIGIO). */ 90#endif 91 92#ifdef __USE_GNU 93# define F_SETSIG 10 /* Set number of signal to be sent. */ 94# define F_GETSIG 11 /* Get number of signal to be sent. */ 95#endif 96 97#ifdef __USE_GNU 98# define F_SETLEASE 1024 /* Set a lease. */ 99# define F_GETLEASE 1025 /* Enquire what lease is active. */ 100# define F_NOTIFY 1026 /* Request notfications on a directory. */ 101# define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with 102 close-on-exit set on new fd. */ 103#endif 104 105/* For F_[GET|SET]FD. */ 106#define FD_CLOEXEC 1 /* actually anything with low bit set goes */ 107 108/* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */ 109#define F_RDLCK 0 /* Read lock. */ 110#define F_WRLCK 1 /* Write lock. */ 111#define F_UNLCK 2 /* Remove lock. */ 112 113/* For old implementation of bsd flock(). */ 114#define F_EXLCK 4 /* or 3 */ 115#define F_SHLCK 8 /* or 4 */ 116 117#ifdef __USE_BSD 118/* Operations for bsd flock(), also used by the kernel implementation. */ 119# define LOCK_SH 1 /* shared lock */ 120# define LOCK_EX 2 /* exclusive lock */ 121# define LOCK_NB 4 /* or'd with one of the above to prevent 122 blocking */ 123# define LOCK_UN 8 /* remove lock */ 124#endif 125 126#ifdef __USE_GNU 127# define LOCK_MAND 32 /* This is a mandatory flock: */ 128# define LOCK_READ 64 /* ... which allows concurrent read operations. */ 129# define LOCK_WRITE 128 /* ... which allows concurrent write operations. */ 130# define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */ 131#endif 132 133#ifdef __USE_GNU 134/* Types of directory notifications that may be requested with F_NOTIFY. */ 135# define DN_ACCESS 0x00000001 /* File accessed. */ 136# define DN_MODIFY 0x00000002 /* File modified. */ 137# define DN_CREATE 0x00000004 /* File created. */ 138# define DN_DELETE 0x00000008 /* File removed. */ 139# define DN_RENAME 0x00000010 /* File renamed. */ 140# define DN_ATTRIB 0x00000020 /* File changed attibutes. */ 141# define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */ 142#endif 143 144struct flock 145 { 146 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 147 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 148#ifndef __USE_FILE_OFFSET64 149 __off_t l_start; /* Offset where the lock begins. */ 150 __off_t l_len; /* Size of the locked area; zero means until EOF. */ 151#else 152 __off64_t l_start; /* Offset where the lock begins. */ 153 __off64_t l_len; /* Size of the locked area; zero means until EOF. */ 154#endif 155 __pid_t l_pid; /* Process holding the lock. */ 156 }; 157 158#ifdef __USE_LARGEFILE64 159struct flock64 160 { 161 short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */ 162 short int l_whence; /* Where `l_start' is relative to (like `lseek'). */ 163 __off64_t l_start; /* Offset where the lock begins. */ 164 __off64_t l_len; /* Size of the locked area; zero means until EOF. */ 165 __pid_t l_pid; /* Process holding the lock. */ 166 }; 167#endif 168 169/* Define some more compatibility macros to be backward compatible with 170 BSD systems which did not managed to hide these kernel macros. */ 171#ifdef __USE_BSD 172# define FAPPEND O_APPEND 173# define FFSYNC O_FSYNC 174# define FASYNC O_ASYNC 175# define FNONBLOCK O_NONBLOCK 176# define FNDELAY O_NDELAY 177#endif /* Use BSD. */ 178 179/* Advise to `posix_fadvise'. */ 180#ifdef __USE_XOPEN2K 181# define POSIX_FADV_NORMAL 0 /* No further special treatment. */ 182# define POSIX_FADV_RANDOM 1 /* Expect random page references. */ 183# define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */ 184# define POSIX_FADV_WILLNEED 3 /* Will need these pages. */ 185# define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */ 186# define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */ 187#endif 188 189 190#if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__ 191/* Flags for SYNC_FILE_RANGE. */ 192# define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages 193 in the range before performing the 194 write. */ 195# define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those 196 dirty pages in the range which are 197 not presently under writeback. */ 198# define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in 199 the range after performing the 200 write. */ 201 202/* Flags for SPLICE and VMSPLICE. */ 203# define SPLICE_F_MOVE 1 /* Move pages instead of copying. */ 204# define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing 205 (but we may still block on the fd 206 we splice from/to). */ 207# define SPLICE_F_MORE 4 /* Expect more data. */ 208# define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */ 209#endif 210 211__BEGIN_DECLS 212 213#if defined __USE_GNU && defined __UCLIBC_LINUX_SPECIFIC__ 214 215/* Provide kernel hint to read ahead. */ 216extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count) 217 __THROW; 218 219/* Selective file content synch'ing. */ 220extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to, 221 unsigned int __flags); 222 223/* Splice address range into a pipe. */ 224extern ssize_t vmsplice (int __fdout, const struct iovec *__iov, 225 size_t __count, unsigned int __flags); 226 227/* Splice two files together. */ 228extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout, 229 __off64_t *__offout, size_t __len, 230 unsigned int __flags); 231 232/* In-kernel implementation of tee for pipe buffers. */ 233extern ssize_t tee (int __fdin, int __fdout, size_t __len, 234 unsigned int __flags); 235 236#endif 237__END_DECLS 238 239