mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
195 lines
7.1 KiB
C
195 lines
7.1 KiB
C
/* O_*, F_*, FD_* bit values for Linux.
|
|
Copyright (C) 1995, 1996, 1997, 1998, 2000, 2002, 2003, 2004
|
|
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
|
|
|
|
#include <sgidefs.h>
|
|
#include <sys/types.h>
|
|
|
|
/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
|
|
located on an ext2 file system */
|
|
#define O_ACCMODE 0x0003
|
|
#define O_RDONLY 0x0000
|
|
#define O_WRONLY 0x0001
|
|
#define O_RDWR 0x0002
|
|
#define O_APPEND 0x0008
|
|
#define O_SYNC 0x0010
|
|
#define O_NONBLOCK 0x0080
|
|
#define O_CREAT 0x0100 /* not fcntl */
|
|
#define O_TRUNC 0x0200 /* not fcntl */
|
|
#define O_EXCL 0x0400 /* not fcntl */
|
|
#define O_NOCTTY 0x0800 /* not fcntl */
|
|
#define O_FSYNC O_SYNC
|
|
#define O_ASYNC 0x1000
|
|
|
|
#ifdef __USE_LARGEFILE64
|
|
# define O_LARGEFILE 0x2000 /* Allow large file opens. */
|
|
#endif
|
|
|
|
#ifdef __USE_GNU
|
|
# define O_NOFOLLOW 0x20000 /* Do not follow links. */
|
|
# define O_DIRECT 0x8000 /* Direct disk access hint. */
|
|
# define O_DIRECTORY 0x10000 /* Must be a directory. */
|
|
# define O_NOATIME 0x40000 /* Do not set atime. */
|
|
#endif
|
|
|
|
#define O_NDELAY O_NONBLOCK
|
|
|
|
/* For now Linux has no synchronisity options for data and read
|
|
operations. We define the symbols here but let them do the same as
|
|
O_SYNC since this is a superset. */
|
|
#if defined __USE_POSIX199309 || defined __USE_UNIX98
|
|
# define O_DSYNC O_SYNC /* Synchronize data. */
|
|
# define O_RSYNC O_SYNC /* Synchronize read operations. */
|
|
#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. */
|
|
#ifndef __USE_FILE_OFFSET64
|
|
# define F_GETLK 14 /* Get record locking info. */
|
|
# define F_SETLK 6 /* Set record locking info (non-blocking). */
|
|
# define F_SETLKW 7 /* Set record locking info (blocking). */
|
|
#else
|
|
# define F_GETLK F_GETLK64 /* Get record locking info. */
|
|
# define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/
|
|
# define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */
|
|
#endif
|
|
|
|
#define F_GETLK64 33 /* Get record locking info. */
|
|
#define F_SETLK64 34 /* Set record locking info (non-blocking). */
|
|
#define F_SETLKW64 35 /* Set record locking info (blocking). */
|
|
|
|
#if defined __USE_BSD || defined __USE_UNIX98
|
|
# define F_SETOWN 24 /* Get owner of socket (receiver of SIGIO). */
|
|
# define F_GETOWN 23 /* Set owner of socket (receiver of SIGIO). */
|
|
#endif
|
|
|
|
#ifdef __USE_GNU
|
|
# define F_SETSIG 10 /* Set number of signal to be sent. */
|
|
# define F_GETSIG 11 /* Get number of signal to be sent. */
|
|
#endif
|
|
|
|
#ifdef __USE_GNU
|
|
# define F_SETLEASE 1024 /* Set a lease. */
|
|
# define F_GETLEASE 1025 /* Enquire what lease is active. */
|
|
# define F_NOTIFY 1026 /* Request notfications on a directory. */
|
|
#endif
|
|
|
|
/* for F_[GET|SET]FL */
|
|
#define FD_CLOEXEC 1 /* actually anything with low bit set goes */
|
|
|
|
/* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */
|
|
#define F_RDLCK 0 /* Read lock. */
|
|
#define F_WRLCK 1 /* Write lock. */
|
|
#define F_UNLCK 2 /* Remove lock. */
|
|
|
|
/* for old implementation of bsd flock () */
|
|
#define F_EXLCK 4 /* or 3 */
|
|
#define F_SHLCK 8 /* or 4 */
|
|
|
|
#ifdef __USE_BSD
|
|
/* Operations for bsd flock(), also used by the kernel implementation */
|
|
# define LOCK_SH 1 /* shared lock */
|
|
# define LOCK_EX 2 /* exclusive lock */
|
|
# define LOCK_NB 4 /* or'd with one of the above to prevent
|
|
blocking */
|
|
# define LOCK_UN 8 /* remove lock */
|
|
#endif
|
|
|
|
#ifdef __USE_GNU
|
|
# define LOCK_MAND 32 /* This is a mandatory flock: */
|
|
# define LOCK_READ 64 /* ... which allows concurrent read operations. */
|
|
# define LOCK_WRITE 128 /* ... which allows concurrent write operations. */
|
|
# define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */
|
|
#endif
|
|
|
|
#ifdef __USE_GNU
|
|
/* Types of directory notifications that may be requested with F_NOTIFY. */
|
|
# define DN_ACCESS 0x00000001 /* File accessed. */
|
|
# define DN_MODIFY 0x00000002 /* File modified. */
|
|
# define DN_CREATE 0x00000004 /* File created. */
|
|
# define DN_DELETE 0x00000008 /* File removed. */
|
|
# define DN_RENAME 0x00000010 /* File renamed. */
|
|
# define DN_ATTRIB 0x00000020 /* File changed attibutes. */
|
|
# define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */
|
|
#endif
|
|
|
|
typedef struct flock
|
|
{
|
|
short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
|
|
short 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. */
|
|
#if _MIPS_SIM != _ABI64
|
|
/* The 64-bit flock structure, used by the n64 ABI, and for 64-bit
|
|
fcntls in o32 and n32, never has this field. */
|
|
long int l_sysid;
|
|
#endif
|
|
#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. */
|
|
#if ! defined __USE_FILE_OFFSET64 && _MIPS_SIM != _ABI64
|
|
/* The 64-bit flock structure, used by the n64 ABI, and for 64-bit
|
|
flock in o32 and n32, never has this field. */
|
|
long int pad[4];
|
|
#endif
|
|
} flock_t;
|
|
|
|
#ifdef __USE_LARGEFILE64
|
|
struct flock64
|
|
{
|
|
short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
|
|
short 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
|
|
|
|
|
|
/* Define some more compatibility macros to be backward compatible with
|
|
BSD systems which did not managed to hide these kernel macros. */
|
|
#ifdef __USE_BSD
|
|
# define FAPPEND O_APPEND
|
|
# define FFSYNC O_FSYNC
|
|
# define FASYNC O_ASYNC
|
|
# define FNONBLOCK O_NONBLOCK
|
|
# define FNDELAY O_NDELAY
|
|
#endif /* Use BSD. */
|
|
|
|
/* 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
|