/* O_*, F_*, FD_* bit values for GNU.   Copyright (C) 1993,94,96,97,98,99,2000,01,04 Free Software Foundation, Inc.   This file is part of the GNU C Library.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 of the License, or (at your option) any later version.   The GNU C Library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#ifndef _FCNTL_H# error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."#endif/* File access modes.  These are understood by io servers; they can be   passed in `dir_lookup', and are returned by `io_get_openmodes'.   Consequently they can be passed to `open', `hurd_file_name_lookup', and   `file_name_lookup'; and are returned by `fcntl' with the F_GETFL   command.  *//* In GNU, read and write are bits (unlike BSD).  */#ifdef __USE_GNU# define O_READ		O_RDONLY /* Open for reading.  */# define O_WRITE	O_WRONLY /* Open for writing.  */# define O_EXEC		0x0004	/* Open for execution.  */# define O_NORW		0	/* Open without R/W access.  */#endif/* POSIX.1 standard names.  */#define	O_RDONLY	0x0001	/* Open read-only.  */#define	O_WRONLY	0x0002	/* Open write-only.  */#define	O_RDWR		(O_RDONLY|O_WRONLY) /* Open for reading and writing. */#define	O_ACCMODE	O_RDWR	/* Mask for file access modes.  */#define O_LARGEFILE	0/* File name translation flags.  These are understood by io servers;   they can be passed in `dir_lookup', and consequently to `open',   `hurd_file_name_lookup', and `file_name_lookup'.  */#define	O_CREAT		0x0010	/* Create file if it doesn't exist.  */#define	O_EXCL		0x0020	/* Fail if file already exists.  */#ifdef __USE_GNU# define O_NOLINK	0x0040	/* No name mappings on final component.  */# define O_NOTRANS	0x0080	/* No translator on final component. */# define O_NOFOLLOW	0x00100000 /* Produce ENOENT if file is a symlink.  */# define O_DIRECTORY	0x00200000 /* Produce ENOTDIR if not a directory.  */#endif/* I/O operating modes.  These are understood by io servers; they can be   passed in `dir_lookup' and set or fetched with `io_*_openmodes'.   Consequently they can be passed to `open', `hurd_file_name_lookup',   `file_name_lookup', and `fcntl' with the F_SETFL command; and are   returned by `fcntl' with the F_GETFL command.  */#define	O_APPEND	0x0100	/* Writes always append to the file.  */#define O_ASYNC		0x0200	/* Send SIGIO to owner when data is ready.  */#define O_FSYNC		0x0400	/* Synchronous writes.  */#define O_SYNC		O_FSYNC#ifdef __USE_GNU# define O_NOATIME	0x0800	/* Don't set access time on read (owner).  */#endif#ifdef	__USE_MISC# define O_SHLOCK	0x00020000 /* Open with shared file lock.  */# define O_EXLOCK	0x00040000 /* Open with exclusive file lock.  */#endif/* These are lesser flavors of partial synchronization that are   implied by our one flag (O_FSYNC).  */#if defined __USE_POSIX199309 || defined __USE_UNIX98# define O_DSYNC	O_SYNC	/* Synchronize data.  */# define O_RSYNC	O_SYNC	/* Synchronize read operations.	 */#endif/* The name O_NONBLOCK is unfortunately overloaded; it is both a file name   translation flag and an I/O operating mode.  O_NDELAY is the deprecated   BSD name for the same flag, overloaded in the same way.   When used in `dir_lookup' (and consequently `open', `hurd_file_name_lookup',   or `file_name_lookup'), O_NONBLOCK says the open should return immediately   instead of blocking for any significant length of time (e.g., to wait   for carrier detect on a serial line).  It is also saved as an I/O   operating mode, and after open has the following meaning.   When used in `io_*_openmodes' (and consequently `fcntl' with the F_SETFL   command), the O_NONBLOCK flag means to do nonblocking i/o: any i/o   operation that would block for any significant length of time will instead   fail with EAGAIN.  */#define	O_NONBLOCK	0x0008	/* Non-blocking open or non-blocking I/O.  */#ifdef __USE_BSD# define O_NDELAY	O_NONBLOCK /* Deprecated.  */#endif#ifdef __USE_GNU/* Mask of bits which are understood by io servers.  */# define O_HURD		(0xffff | O_EXLOCK | O_SHLOCK)#endif/* Open-time action flags.  These are understood by `hurd_file_name_lookup'   and consequently by `open' and `file_name_lookup'.  They are not preserved   once the file has been opened.  */#define	O_TRUNC		0x00010000 /* Truncate file to zero length.  *//* Controlling terminal flags.  These are understood only by `open',   and are not preserved once the file has been opened.  */#ifdef __USE_GNU# define O_IGNORE_CTTY	0x00080000 /* Don't do any ctty magic at all.  */#endif/* `open' never assigns a controlling terminal in GNU.  */#define	O_NOCTTY	0	/* Don't assign a controlling terminal.  */#ifdef __USE_BSD/* Bits in the file status flags returned by F_GETFL.  */# define FREAD		O_RDONLY# define FWRITE		O_WRONLY/* Traditional BSD names the O_* bits.  */# define FASYNC		O_ASYNC# define FCREAT		O_CREAT# define FEXCL		O_EXCL# define FTRUNC		O_TRUNC# define FNOCTTY	O_NOCTTY# define FFSYNC		O_FSYNC# define FSYNC		O_SYNC# define FAPPEND	O_APPEND# define FNONBLOCK	O_NONBLOCK# define FNDELAY	O_NDELAY#endif/* Values for the second argument to `fcntl'.  */#define	F_DUPFD	  	0	/* Duplicate file descriptor.  */#define	F_GETFD		1	/* Get file descriptor flags.  */#define	F_SETFD		2	/* Set file descriptor flags.  */#define	F_GETFL		3	/* Get file status flags.  */#define	F_SETFL		4	/* Set file status flags.  */#if defined __USE_BSD || defined __USE_UNIX98# define F_GETOWN	5	/* Get owner (receiver of SIGIO).  */# define F_SETOWN	6	/* Set owner (receiver of SIGIO).  */#endif#define	F_GETLK		7	/* Get record locking info.  */#define	F_SETLK		8	/* Set record locking info (non-blocking).  */#define	F_SETLKW	9	/* Set record locking info (blocking).  *//* File descriptor flags used with F_GETFD and F_SETFD.  */#define	FD_CLOEXEC	1	/* Close on exec.  */#include <bits/types.h>/* The structure describing an advisory lock.  This is the type of the third   argument to `fcntl' for the F_GETLK, F_SETLK, and F_SETLKW requests.  */struct flock  {    int l_type;		/* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */    int l_whence;	/* Where `l_start' is relative to (like `lseek').  */#ifndef __USE_FILE_OFFSET64    __off_t l_start;	/* Offset where the lock begins.  */    __off_t l_len;	/* Size of the locked area; zero means until EOF.  */#else    __off64_t l_start;	/* Offset where the lock begins.  */    __off64_t l_len;	/* Size of the locked area; zero means until EOF.  */#endif    __pid_t l_pid;	/* Process holding the lock.  */  };#ifdef __USE_LARGEFILE64struct flock64  {    int l_type;		/* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */    int l_whence;	/* Where `l_start' is relative to (like `lseek').  */    __off64_t l_start;	/* Offset where the lock begins.  */    __off64_t l_len;	/* Size of the locked area; zero means until EOF.  */    __pid_t l_pid;	/* Process holding the lock.  */  };#endif/* Values for the `l_type' field of a `struct flock'.  */#define	F_RDLCK	1	/* Read lock.  */#define	F_WRLCK	2	/* Write lock.  */#define	F_UNLCK	3	/* Remove lock.  *//* Advise to `posix_fadvise'.  */#ifdef __USE_XOPEN2K# define POSIX_FADV_NORMAL	0 /* No further special treatment.  */# define POSIX_FADV_RANDOM	1 /* Expect random page references.  */# define POSIX_FADV_SEQUENTIAL	2 /* Expect sequential page references.  */# define POSIX_FADV_WILLNEED	3 /* Will need these pages.  */# define POSIX_FADV_DONTNEED	4 /* Don't need these pages.  */# define POSIX_FADV_NOREUSE	5 /* Data will be accessed once.  */#endif