/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1998 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

#ifndef _SYS_FILE_H
#define _SYS_FILE_H

#ifndef _SYS_TYPES_H
#include <sys/types.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

/*
 * One file structure is allocated for each open/creat/pipe call.
 * Main use is to hold the read/write pointer associated with
 * each open file.
 */

typedef struct file
{
        struct file  *f_next;           /* pointer to next entry */
        struct file  *f_prev;           /* pointer to previous entry */
        ushort_t f_flag;
        cnt_t   f_count;                /* reference count */
        struct vnode *f_vnode;          /* pointer to vnode structure */
        off_t   f_offset;               /* read/write character pointer */
        struct  cred *f_cred;           /* credentials of user who opened it */
        struct  aioreq *f_aiof;         /* aio file list forward link   */
        struct  aioreq *f_aiob;         /* aio file list backward link  */
/* #ifdef MERGE */
        struct  file *f_slnk;           /* XENIX semaphore queue */
/* #endif MERGE */
} file_t;


#ifndef _SYS_FCNTL_H
#include <sys/fcntl.h>
#endif

/* flags - see also fcntl.h */

#ifndef FOPEN
#define FOPEN   0xFFFFFFFF
#define FREAD   0x01
#define FWRITE  0x02
#define FNDELAY 0x04
#define FAPPEND 0x08
#define FSYNC   0x10
#define FNONBLOCK       0x80    /* Non-blocking flag (POSIX).   */

#define FMASK   0xff            /* should be disjoint from FASYNC */

/* open only modes */

#define FCREAT  0x100
#define FTRUNC  0x200
#define FEXCL   0x400
#define FNOCTTY 0x800           /* don't allocate controlling tty (POSIX). */
#define FASYNC  0x1000          /* asyncio is in progress */
#define FPRIV   0x1000          /* open with private access */

/* file descriptor flags */
#define FCLOSEXEC       001     /* close on exec */
#endif

/* record-locking options. */
#define F_ULOCK         0       /* Unlock a previously locked region */
#define F_LOCK          1       /* Lock a region for exclusive use */
#define F_TLOCK         2       /* Test and lock a region for exclusive use */
#define F_TEST          3       /* Test a region for other processes locks */

/*
 * flock operations.
 */
#define LOCK_SH         1       /* shared lock */
#define LOCK_EX         2       /* exclusive lock */
#define LOCK_NB         4       /* don't block when locking */
#define LOCK_UN         8       /* unlock */

/*
 * Access call.
 */
#define F_OK            0       /* does file exist */
#define X_OK            1       /* is it executable by caller */
#define W_OK            2       /* writable by caller */
#define R_OK            4       /* readable by caller */

/*
 * Lseek call.
 */
#ifndef L_SET
#define L_SET           0       /* absolute offset */
#define L_INCR          1       /* relative to current offset */
#define L_XTND          2       /* relative to end of file */
#endif


/* miscellaneous defines */

#define NULLFP ((struct file *)0)

/*
 * Count of number of entries in file list.
 */
extern unsigned int filecnt;

/*
 * routines dealing with user per-open file flags and
 * user open files.  getf() is declared in systm.h.  It
 * probably belongs here.
 */
#if defined(__STDC__)
extern void setf(int, file_t *);
extern void setpof(int, char);
extern char getpof(int);
extern int fassign(struct vnode **, int, int *);
#else
extern void setf(), setpof();
extern char getpof();
extern int fassign();
#endif

extern off_t lseek();

#if     defined(_LARGEFILE64_SOURCE) && !((_FILE_OFFSET_BITS == 64) && \
        !defined(__PRAGMA_REDEFINE_EXTNAME))
#if defined(__STDC__)
extern off64_t lseek64(int, off64_t, int);
#else
extern off64_t llseek64();
#endif
#endif  /* _LARGEFILE64_SOURCE... */

#ifdef __cplusplus
}
#endif

#endif  /* _SYS_FILE_H */