fcntl.h

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#ifndef _I386_FCNTL_H
#define _I386_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		   0100	/* not fcntl */
#define O_EXCL		   0200	/* not fcntl */
#define O_NOCTTY	   0400	/* not fcntl */
#define O_TRUNC		  01000	/* not fcntl */
#define O_APPEND	  02000
#define O_NONBLOCK	  04000
#define O_NDELAY	O_NONBLOCK
#define O_SYNC		 010000
#define FASYNC		 020000	/* fcntl, for BSD compatibility */
#define O_DIRECT	 040000	/* direct disk access hint - currently ignored */
#define O_LARGEFILE	0100000
#define O_DIRECTORY	0200000	/* must be a directory */
#define O_NOFOLLOW	0400000 /* don't follow links */

#define F_DUPFD		0	/* dup */
#define F_GETFD		1	/* get f_flags */
#define F_SETFD		2	/* set f_flags */
#define F_GETFL		3	/* more flags (cloexec) */
#define F_SETFL		4
#define F_GETLK		5
#define F_SETLK		6
#define F_SETLKW	7

#define F_SETOWN	8	/*  for sockets. */
#define F_GETOWN	9	/*  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		0
#define F_WRLCK		1
#define F_UNLCK		2

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

/* 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 */

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

#endif