Coherent4.2.10/include/fcntl.h

/* (-lgl
 *	Coherent 386 release 4.2
 *	Copyright (c) 1982, 1993 by Mark Williams Company.
 *	All rights reserved. May not be copied without permission.
 *	For copying permission and licensing info, write licensing@mwc.com
 -lgl) */

#ifndef	__FCNTL_H__
#define	__FCNTL_H__

#include <common/feature.h>
#include <common/ccompat.h>
#include <common/_uid.h>

/*
 * Flag values accessible to open () and fcntl ()
 * The first three can only be set by open ().
 */

#define	O_RDONLY	0x00
#define	O_WRONLY	0x01
#define	O_RDWR		0x02
#define	O_NDELAY	0x04	/* non-blocking i/o */
#define	O_APPEND	0x08	/* append (writes guaranteed at the end	*/

#define O_SYNC		0x10	/* sync on every write */
#define	O_TRACE		0x20	/* NON-STANDARD - for filesystem debugging */
#define	O_NONBLOCK	0x80	/* non-blocking	i/o */

/* Flag values accessible only to 3 argument open (). */

#define	O_CREAT		0x100	/* open with file create (third open arg) */
#define	O_TRUNC		0x200	/* open with truncation */
#define	O_EXCL		0x400	/* exclusive open */
#define O_NOCTTY	0x800	/* don't assign a controlling tty */


/* fcntl () requests. */

#define	F_DUPFD		0	/* duplicate file desriptor */
#define	F_GETFD		1	/* get file descriptor flags */
#define	F_SETFD		2	/* set file descriptor flags */
#define	F_GETFL		3	/* get file flags */
#define	F_SETFL		4	/* set file flags */
#define	F_GETLK		5	/* return blocking lock */
#define	F_SETLK		6	/* set or remove lock, return if blocked */
#define	F_SETLKW	7	/* set or remove lock, sleep if blocked	*/


/* Locking command/return structure. */

struct flock {
	short		l_type;		/* F_RDLCK, F_WRLCK, or F_UNLCK	*/
	short		l_whence;	/* SEEK_SET, SEEK_CUR, SEEK_END	*/
	long		l_start;	/* location */
	long		l_len;		/* 0 is through EOF */
	short		__NON_POSIX (l_sysid);
					/* system id of lock (GETLK) ? */
	short		l_pid;		/* process id of owner (GETLK) */
};

#if	! _POSIX_C_SOURCE

typedef	struct flock	flock_t;

#endif


/* lock () command types. */

#define	F_RDLCK	1		/* read lock; more than 1 allowed */
#define	F_WRLCK	2		/* write lock; blocks any lock */
#define	F_UNLCK 3		/* unlock */


/* Close on exec bit */

#define	FD_CLOEXEC	1	/* close fd on exec */


__EXTERN_C_BEGIN__

int		creat		__PROTO ((__CONST__ char * _path,
					  __mode_t _mode));
int		fcntl		__PROTO ((int _fildes, int _cmd, ...));
int		open		__PROTO ((__CONST__ char * _path, int _oflag,
					  ...));

__EXTERN_C_END__

#endif	/* ! defined (__FCNTL_H__) */