/* * 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 8.3 (Berkeley) 1/9/95 * $Id: file.h,v 1.1.1.1 2006/05/30 06:12:53 hhzhou Exp $ */ #ifndef _SYS_FILE_H_ #define _SYS_FILE_H_ #ifndef KERNEL #include #include #endif #ifdef KERNEL #include 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 */ #define DTYPE_PIPE 3 /* pipe */ #define DTYPE_FIFO 4 /* fifo (named pipe) */ 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 flags)); int (*fo_write) __P((struct file *fp, struct uio *uio, struct ucred *cred, int flags)); #define FOF_OFFSET 1 int (*fo_ioctl) __P((struct file *fp, u_long com, caddr_t data, struct proc *p)); int (*fo_poll) __P((struct file *fp, int events, struct ucred *cred, struct proc *p)); int (*fo_close) __P((struct file *fp, struct proc *p)); } *f_ops; int f_seqcount; /* * count of sequential accesses -- cleared * by most seek operations. */ off_t f_nextread; /* * offset of next expected read */ off_t f_offset; caddr_t f_data; /* vnode or socket */ }; #ifdef MALLOC_DECLARE MALLOC_DECLARE(M_FILE); #endif LIST_HEAD(filelist, file); extern struct filelist filehead; /* head of list of open files */ extern struct fileops vnops; extern int maxfiles; /* kernel limit on number of open files */ extern int maxfilesperproc; /* per process limit on number of open files */ extern int nfiles; /* actual number of open files */ #endif /* KERNEL */ #endif /* !SYS_FILE_H */