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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
26: /*
27: * Copyright (c) 1982, 1986, 1989, 1993
28: * The Regents of the University of California. All rights reserved.
29: *
30: * Redistribution and use in source and binary forms, with or without
31: * modification, are permitted provided that the following conditions
32: * are met:
33: * 1. Redistributions of source code must retain the above copyright
34: * notice, this list of conditions and the following disclaimer.
35: * 2. Redistributions in binary form must reproduce the above copyright
36: * notice, this list of conditions and the following disclaimer in the
37: * documentation and/or other materials provided with the distribution.
38: * 3. All advertising materials mentioning features or use of this software
39: * must display the following acknowledgement:
40: * This product includes software developed by the University of
41: * California, Berkeley and its contributors.
42: * 4. Neither the name of the University nor the names of its contributors
43: * may be used to endorse or promote products derived from this software
44: * without specific prior written permission.
45: *
46: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
47: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
50: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56: * SUCH DAMAGE.
57: *
58: * @(#)file.h 8.3 (Berkeley) 1/9/95
59: */
60:
61: #ifndef _SYS_FILE_H_
62: #define _SYS_FILE_H_
63:
64: #include <sys/fcntl.h>
65: #include <sys/unistd.h>
66:
67: #ifdef _KERNEL
68: #include <sys/queue.h>
69:
70: struct proc;
71: struct uio;
72:
73: /*
74: * Kernel descriptor table.
75: * One entry for each open kernel vnode and socket.
76: */
77: struct file {
78: LIST_ENTRY(file) f_list;/* list of active files */
79: short f_flag; /* see fcntl.h */
80: #define DTYPE_VNODE 1 /* file */
81: #define DTYPE_SOCKET 2 /* communications endpoint */
82: short f_type; /* descriptor type */
83: short f_count; /* reference count */
84: short f_msgcount; /* references from message queue */
85: struct ucred *f_cred; /* credentials associated with descriptor */
86: struct fileops {
87: int (*fo_read) __P((struct file *fp, struct uio *uio,
88: struct ucred *cred));
89: int (*fo_write) __P((struct file *fp, struct uio *uio,
90: struct ucred *cred));
91: int (*fo_ioctl) __P((struct file *fp, u_long com,
92: caddr_t data, struct proc *p));
93: int (*fo_select) __P((struct file *fp, int which,
94: struct proc *p));
95: int (*fo_close) __P((struct file *fp, struct proc *p));
96: } *f_ops;
97: off_t f_offset;
98: caddr_t f_data; /* vnode or socket */
99: };
100:
101: LIST_HEAD(filelist, file);
102: extern struct filelist filehead; /* head of list of open files */
103: extern int maxfiles; /* kernel limit on number of open files */
104: extern int nfiles; /* actual number of open files */
105:
106: #endif /* _KERNEL */
107:
108: #endif /* !_SYS_FILE_H_ */
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