fcntl.h

Linux内核源代码 为压缩文件 是<<Linux内核>>一书中的源代码

/* $Id: fcntl.h,v 1.11 2000/09/23 02:09:21 davem Exp $ */
#ifndef _SPARC64_FCNTL_H
#define _SPARC64_FCNTL_H

/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
   located on an ext2 file system */
#define O_RDONLY	0x0000
#define O_WRONLY	0x0001
#define O_RDWR		0x0002
#define O_ACCMODE	0x0003
#define O_NDELAY	0x0004
#define O_APPEND	0x0008
#define FASYNC		0x0040	/* fcntl, for BSD compatibility */
#define O_CREAT		0x0200	/* not fcntl */
#define O_TRUNC		0x0400	/* not fcntl */
#define O_EXCL		0x0800	/* not fcntl */
#define O_SYNC		0x2000
#define O_NONBLOCK	0x4000
#define O_NOCTTY	0x8000	/* not fcntl */
#define O_DIRECTORY	0x10000	/* must be a directory */
#define O_NOFOLLOW	0x20000	/* don't follow links */
#define O_LARGEFILE	0x40000

#define F_DUPFD		0	/* dup */
#define F_GETFD		1	/* get close_on_exec */
#define F_SETFD		2	/* set/clear close_on_exec */
#define F_GETFL		3	/* get file->f_flags */
#define F_SETFL		4	/* set file->f_flags */
#define F_GETOWN	5	/*  for sockets. */
#define F_SETOWN	6	/*  for sockets. */
#define F_GETLK		7
#define F_SETLK		8
#define F_SETLKW	9
#define F_SETSIG	10	/*  for sockets. */
#define F_GETSIG	11	/*  for sockets. */

#ifdef __KERNEL__
#define F_GETLK64	12
#define F_SETLK64	13
#define F_SETLKW64	14
#endif

/* for F_[GET|SET]FL */
#define FD_CLOEXEC	1	/* actually anything with low bit set goes */

/* for posix fcntl() and lockf() */
#define F_RDLCK		1
#define F_WRLCK		2
#define F_UNLCK		3

/* for old implementation of bsd flock () */
#define F_EXLCK		4	/* or 3 */
#define F_SHLCK		8	/* or 4 */

/* for leases */
#define F_INPROGRESS	16

/* 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 */

#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 ops */

struct flock {
	short l_type;
	short l_whence;
	off_t l_start;
	off_t l_len;
	pid_t l_pid;
	short __unused;
};

#ifdef __KERNEL__
struct flock32 {
	short l_type;
	short l_whence;
	__kernel_off_t32 l_start;
	__kernel_off_t32 l_len;
	__kernel_pid_t32 l_pid;
	short __unused;
};
#endif

#ifdef __KERNEL__
#define flock64	flock
#endif

#define F_LINUX_SPECIFIC_BASE	1024
#endif /* !(_SPARC64_FCNTL_H) */