81 lines
3.2 KiB
C
81 lines
3.2 KiB
C
/* $NetBSD: file.h,v 1.11 1995/03/26 20:24:13 jtc Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1982, 1986, 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)file.h 8.2 (Berkeley) 8/20/94
|
|
*/
|
|
|
|
#include <sys/fcntl.h>
|
|
#include <sys/unistd.h>
|
|
|
|
#ifdef _KERNEL
|
|
#include <sys/queue.h>
|
|
|
|
struct proc;
|
|
struct uio;
|
|
|
|
/*
|
|
* Kernel descriptor table.
|
|
* One entry for each open kernel vnode and socket.
|
|
*/
|
|
struct file {
|
|
LIST_ENTRY(file) f_list;/* list of active files */
|
|
short f_flag; /* see fcntl.h */
|
|
#define DTYPE_VNODE 1 /* file */
|
|
#define DTYPE_SOCKET 2 /* communications endpoint */
|
|
short f_type; /* descriptor type */
|
|
short f_count; /* reference count */
|
|
short f_msgcount; /* references from message queue */
|
|
struct ucred *f_cred; /* credentials associated with descriptor */
|
|
struct fileops {
|
|
int (*fo_read) __P((struct file *fp, struct uio *uio,
|
|
struct ucred *cred));
|
|
int (*fo_write) __P((struct file *fp, struct uio *uio,
|
|
struct ucred *cred));
|
|
int (*fo_ioctl) __P((struct file *fp, u_long com,
|
|
caddr_t data, struct proc *p));
|
|
int (*fo_select) __P((struct file *fp, int which,
|
|
struct proc *p));
|
|
int (*fo_close) __P((struct file *fp, struct proc *p));
|
|
} *f_ops;
|
|
off_t f_offset;
|
|
caddr_t f_data; /* vnode or socket */
|
|
};
|
|
|
|
LIST_HEAD(filelist, file);
|
|
extern struct filelist filehead; /* head of list of open files */
|
|
extern int maxfiles; /* kernel limit on number of open files */
|
|
extern int nfiles; /* actual number of open files */
|
|
|
|
#endif /* _KERNEL */
|