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233 lines
8.2 KiB
C
233 lines
8.2 KiB
C
/* O_*, F_*, FD_* bit values for Linux.
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Copyright (C) 1995-2000,2004,2005,2006,2007 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _FCNTL_H
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# error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
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#endif
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#include <sys/types.h>
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#ifdef __USE_GNU
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# include <bits/uio.h>
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#endif
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/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
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located on an ext2 file system */
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#define O_ACCMODE 0003
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#define O_RDONLY 00
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#define O_WRONLY 01
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#define O_RDWR 02
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#define O_CREAT 01000 /* not fcntl */
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#define O_TRUNC 02000 /* not fcntl */
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#define O_EXCL 04000 /* not fcntl */
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#define O_NOCTTY 010000 /* not fcntl */
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#define O_NONBLOCK 00004
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#define O_APPEND 00010
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#define O_NDELAY O_NONBLOCK
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#define O_SYNC 040000
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#define O_FSYNC O_SYNC
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#define O_ASYNC 020000 /* fcntl, for BSD compatibility */
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#ifdef __USE_GNU
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# define O_DIRECTORY 0100000 /* Must be a directory. */
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# define O_NOFOLLOW 0200000 /* Do not follow links. */
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# define O_DIRECT 02000000 /* Direct disk access. */
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# define O_NOATIME 04000000 /* Do not set atime. */
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# define O_CLOEXEC 010000000 /* Set close_on_exec. */
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#endif
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#ifdef __USE_LARGEFILE64
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/* Not necessary, files are always with 64bit off_t. */
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# define O_LARGEFILE 0
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#endif
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/* For now Linux has synchronisity options for data and read operations.
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We define the symbols here but let them do the same as O_SYNC since
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this is a superset. */
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#if defined __USE_POSIX199309 || defined __USE_UNIX98
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# define O_DSYNC O_SYNC /* Synchronize data. */
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# define O_RSYNC O_SYNC /* Synchronize read operations. */
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#endif
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/* Values for the second argument to `fcntl'. */
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#define F_DUPFD 0 /* Duplicate file descriptor. */
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#define F_GETFD 1 /* Get file descriptor flags. */
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#define F_SETFD 2 /* Set file descriptor flags. */
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#define F_GETFL 3 /* Get file status flags. */
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#define F_SETFL 4 /* Set file status flags. */
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#define F_GETLK 7 /* Get record locking info. */
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#define F_SETLK 8 /* Set record locking info (non-blocking). */
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#define F_SETLKW 9 /* Set record locking info (blocking). */
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#define F_GETLK64 F_GETLK /* Get record locking info. */
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#define F_SETLK64 F_SETLK /* Set record locking info (non-blocking). */
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#define F_SETLKW64 F_SETLKW /* Set record locking info (blocking). */
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#if defined __USE_BSD || defined __USE_UNIX98
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# define F_SETOWN 5 /* Get owner of socket (receiver of SIGIO). */
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# define F_GETOWN 6 /* Set owner of socket (receiver of SIGIO). */
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#endif
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#ifdef __USE_GNU
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# define F_SETSIG 10 /* Set number of signal to be sent. */
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# define F_GETSIG 11 /* Get number of signal to be sent. */
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#endif
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#ifdef __USE_GNU
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# define F_SETLEASE 1024 /* Set a lease. */
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# define F_GETLEASE 1025 /* Enquire what lease is active. */
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# define F_NOTIFY 1026 /* Request notfications on a directory. */
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# define F_DUPFD_CLOEXEC 1030 /* Duplicate file descriptor with
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close-on-exit set. */
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#endif
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/* for F_[GET|SET]FD */
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#define FD_CLOEXEC 1 /* actually anything with low bit set goes */
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/* For posix fcntl() and `l_type' field of a `struct flock' for lockf() */
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#define F_RDLCK 1 /* Read lock. */
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#define F_WRLCK 2 /* Write lock. */
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#define F_UNLCK 8 /* Remove lock. */
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/* for old implementation of bsd flock () */
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#define F_EXLCK 16 /* or 3 */
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#define F_SHLCK 32 /* or 4 */
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/* Operations for bsd flock(), also used by the kernel implementation */
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#ifdef __USE_BSD
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# define LOCK_SH 1 /* shared lock */
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# define LOCK_EX 2 /* exclusive lock */
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# define LOCK_NB 4 /* or'd with one of the above to prevent
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blocking */
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# define LOCK_UN 8 /* remove lock */
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#endif
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#ifdef __USE_GNU
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# define LOCK_MAND 32 /* This is a mandatory flock: */
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# define LOCK_READ 64 /* ... which allows concurrent read operations. */
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# define LOCK_WRITE 128 /* ... which allows concurrent write operations. */
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# define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */
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#endif
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#ifdef __USE_GNU
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/* Types of directory notifications that may be requested with F_NOTIFY. */
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# define DN_ACCESS 0x00000001 /* File accessed. */
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# define DN_MODIFY 0x00000002 /* File modified. */
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# define DN_CREATE 0x00000004 /* File created. */
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# define DN_DELETE 0x00000008 /* File removed. */
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# define DN_RENAME 0x00000010 /* File renamed. */
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# define DN_ATTRIB 0x00000020 /* File changed attibutes. */
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# define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */
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#endif
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/* We don't need to support __USE_FILE_OFFSET64. */
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struct flock
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{
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short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
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short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
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__off_t l_start; /* Offset where the lock begins. */
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__off_t l_len; /* Size of the locked area; zero means until EOF. */
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__pid_t l_pid; /* Process holding the lock. */
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};
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#ifdef __USE_LARGEFILE64
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struct flock64
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{
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short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
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short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
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__off64_t l_start; /* Offset where the lock begins. */
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__off64_t l_len; /* Size of the locked area; zero means until EOF. */
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__pid_t l_pid; /* Process holding the lock. */
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};
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#endif
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/* Define some more compatibility macros to be backward compatible with
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BSD systems which did not managed to hide these kernel macros. */
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#ifdef __USE_BSD
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# define FAPPEND O_APPEND
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# define FFSYNC O_FSYNC
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# define FASYNC O_ASYNC
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# define FNONBLOCK O_NONBLOCK
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# define FNDELAY O_NDELAY
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#endif /* Use BSD. */
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/* Advise to `posix_fadvise'. */
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#ifdef __USE_XOPEN2K
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# define POSIX_FADV_NORMAL 0 /* No further special treatment. */
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# define POSIX_FADV_RANDOM 1 /* Expect random page references. */
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# define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
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# define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
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# define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
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# define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
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#endif
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#ifdef __USE_GNU
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/* Flags for SYNC_FILE_RANGE. */
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# define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages
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in the range before performing the
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write. */
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# define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those
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dirty pages in the range which are
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not presently under writeback. */
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# define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in
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the range after performing the
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write. */
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/* Flags for SPLICE and VMSPLICE. */
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# define SPLICE_F_MOVE 1 /* Move pages instead of copying. */
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# define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing
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(but we may still block on the fd
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we splice from/to). */
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# define SPLICE_F_MORE 4 /* Expect more data. */
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# define SPLICE_F_GIFT 8 /* Pages passed in are a gift. */
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#endif
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__BEGIN_DECLS
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#ifdef __USE_GNU
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/* Provide kernel hint to read ahead. */
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extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
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__THROW;
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/* Selective file content synch'ing. */
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extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
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unsigned int __flags);
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/* Splice address range into a pipe. */
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extern ssize_t vmsplice (int __fdout, const struct iovec *__iov,
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size_t __count, unsigned int __flags);
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/* Splice two files together. */
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extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout,
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__off64_t *__offout, size_t __len,
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unsigned int __flags);
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/* In-kernel implementation of tee for pipe buffers. */
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extern ssize_t tee (int __fdin, int __fdout, size_t __len,
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unsigned int __flags);
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#endif
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__END_DECLS
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