| | 1 | /* |
| | 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * The contents of this file constitute Original Code as defined in and |
| | 7 | * are subject to the Apple Public Source License Version 1.1 (the |
| | 8 | * "License"). You may not use this file except in compliance with the |
| | 9 | * License. Please obtain a copy of the License at |
| | 10 | * http://www.apple.com/publicsource and read it before using this file. |
| | 11 | * |
| | 12 | * This Original Code and all software distributed under the License are |
| | 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| | 17 | * License for the specific language governing rights and limitations |
| | 18 | * under the License. |
| | 19 | * |
| | 20 | * @APPLE_LICENSE_HEADER_END@ |
| | 21 | */ |
| | 22 | /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */ |
| | 23 | /* |
| | 24 | * Copyright (c) 1982, 1986, 1989, 1993 |
| | 25 | * The Regents of the University of California. All rights reserved. |
| | 26 | * |
| | 27 | * Redistribution and use in source and binary forms, with or without |
| | 28 | * modification, are permitted provided that the following conditions |
| | 29 | * are met: |
| | 30 | * 1. Redistributions of source code must retain the above copyright |
| | 31 | * notice, this list of conditions and the following disclaimer. |
| | 32 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 33 | * notice, this list of conditions and the following disclaimer in the |
| | 34 | * documentation and/or other materials provided with the distribution. |
| | 35 | * 3. All advertising materials mentioning features or use of this software |
| | 36 | * must display the following acknowledgement: |
| | 37 | * This product includes software developed by the University of |
| | 38 | * California, Berkeley and its contributors. |
| | 39 | * 4. Neither the name of the University nor the names of its contributors |
| | 40 | * may be used to endorse or promote products derived from this software |
| | 41 | * without specific prior written permission. |
| | 42 | * |
| | 43 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 44 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 45 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 46 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 47 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 48 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 49 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 50 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 51 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 52 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 53 | * SUCH DAMAGE. |
| | 54 | * |
| | 55 | * @(#)file.h 8.3 (Berkeley) 1/9/95 |
| | 56 | */ |
| | 57 | |
| | 58 | #ifndef _SYS_FILE_H_ |
| | 59 | #define _SYS_FILE_H_ |
| | 60 | |
| | 61 | #include <sys/fcntl.h> |
| | 62 | #include <sys/unistd.h> |
| | 63 | |
| | 64 | #ifdef KERNEL |
| | 65 | #include <sys/queue.h> |
| | 66 | #include <sys/cdefs.h> |
| | 67 | |
| | 68 | struct proc; |
| | 69 | struct uio; |
| | 70 | |
| | 71 | /* |
| | 72 | * Kernel descriptor table. |
| | 73 | * One entry for each open kernel vnode and socket. |
| | 74 | */ |
| | 75 | struct file { |
| | 76 | LIST_ENTRY(file) f_list;/* list of active files */ |
| | 77 | short f_flag; /* see fcntl.h */ |
| | 78 | #define DTYPE_VNODE 1 /* file */ |
| | 79 | #define DTYPE_SOCKET 2 /* communications endpoint */ |
| | 80 | #define DTYPE_PSXSHM 3 /* POSIX Shared memory */ |
| | 81 | #define DTYPE_PSXSEM 4 /* POSIX Semaphores */ |
| | 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 | __BEGIN_DECLS |
| | 107 | int fref __P((struct file *)); /* take a reference on file pointer */ |
| | 108 | int frele __P((struct file *)); /* release a reference on file pointer */ |
| | 109 | int fcount __P((struct file *)); /* returns the reference count */ |
| | 110 | __END_DECLS |
| | 111 | |
| | 112 | #endif /* KERNEL */ |
| | 113 | |
| | 114 | #endif /* !_SYS_FILE_H_ */ |
projects / apple / xnu.git / blame_incremental