fcntl.h

嵌入式系统设计与实验教材二源码linux内核移植与编译

#ifndef _ALPHA_FCNTL_H
#define _ALPHA_FCNTL_H

/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
   located on an ext2 file system */
#define O_ACCMODE	  0003
#define O_RDONLY	    00
#define O_WRONLY	    01
#define O_RDWR		    02
#define O_CREAT		 01000	/* not fcntl */
#define O_TRUNC		 02000	/* not fcntl */
#define O_EXCL		 04000	/* not fcntl */
#define O_NOCTTY	010000	/* not fcntl */

#define O_NONBLOCK	 00004
#define O_APPEND	 00010
#define O_NDELAY	O_NONBLOCK
#define O_SYNC		040000
#define FASYNC		020000	/* fcntl, for BSD compatibility */
#define O_DIRECTORY	0100000	/* must be a directory */
#define O_NOFOLLOW	0200000 /* don't follow links */
#define O_LARGEFILE	0400000 /* will be set by the kernel on every open */
#define O_DIRECT	02000000 /* direct disk access - should check with OSF/1 */

#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_GETLK		7
#define F_SETLK		8
#define F_SETLKW	9

#define F_SETOWN	5	/*  for sockets. */
#define F_GETOWN	6	/*  for sockets. */
#define F_SETSIG	10	/*  for sockets. */
#define F_GETSIG	11	/*  for sockets. */

/* 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		8

/* for old implementation of bsd flock () */
#define F_EXLCK		16	/* or 3 */
#define F_SHLCK		32	/* or 4 */

#define F_INPROGRESS	64

/* 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;
	__kernel_off_t l_start;
	__kernel_off_t l_len;
	__kernel_pid_t l_pid;
};

#ifdef __KERNEL__
#define flock64	flock
#endif
#define F_LINUX_SPECIFIC_BASE  1024

#endif