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d7ce7006 | 1 | /*\r |
2 | * Copyright (c) 1982, 1986, 1989, 1993\r | |
3 | * The Regents of the University of California. All rights reserved.\r | |
4 | *\r | |
5 | * Redistribution and use in source and binary forms, with or without\r | |
6 | * modification, are permitted provided that the following conditions\r | |
7 | * are met:\r | |
8 | * 1. Redistributions of source code must retain the above copyright\r | |
9 | * notice, this list of conditions and the following disclaimer.\r | |
10 | * 2. Redistributions in binary form must reproduce the above copyright\r | |
11 | * notice, this list of conditions and the following disclaimer in the\r | |
12 | * documentation and/or other materials provided with the distribution.\r | |
13 | * 3. All advertising materials mentioning features or use of this software\r | |
14 | * must display the following acknowledgement:\r | |
15 | * This product includes software developed by the University of\r | |
16 | * California, Berkeley and its contributors.\r | |
17 | * 4. Neither the name of the University nor the names of its contributors\r | |
18 | * may be used to endorse or promote products derived from this software\r | |
19 | * without specific prior written permission.\r | |
20 | *\r | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r | |
31 | * SUCH DAMAGE.\r | |
32 | *\r | |
33 | * @(#)file.h 8.3 (Berkeley) 1/9/95\r | |
34 | * $Id: file.h,v 1.1.1.1 2006/05/30 06:12:53 hhzhou Exp $\r | |
35 | */\r | |
36 | \r | |
37 | #ifndef _SYS_FILE_H_\r | |
38 | #define _SYS_FILE_H_\r | |
39 | \r | |
40 | #ifndef KERNEL\r | |
41 | #include <sys/fcntl.h>\r | |
42 | #include <sys/unistd.h>\r | |
43 | #endif\r | |
44 | \r | |
45 | #ifdef KERNEL\r | |
46 | #include <sys/queue.h>\r | |
47 | \r | |
48 | struct proc;\r | |
49 | struct uio;\r | |
50 | \r | |
51 | /*\r | |
52 | * Kernel descriptor table.\r | |
53 | * One entry for each open kernel vnode and socket.\r | |
54 | */\r | |
55 | struct file {\r | |
56 | LIST_ENTRY(file) f_list;/* list of active files */\r | |
57 | short f_flag; /* see fcntl.h */\r | |
58 | #define DTYPE_VNODE 1 /* file */\r | |
59 | #define DTYPE_SOCKET 2 /* communications endpoint */\r | |
60 | #define DTYPE_PIPE 3 /* pipe */\r | |
61 | #define DTYPE_FIFO 4 /* fifo (named pipe) */\r | |
62 | short f_type; /* descriptor type */\r | |
63 | short f_count; /* reference count */\r | |
64 | short f_msgcount; /* references from message queue */\r | |
65 | struct ucred *f_cred; /* credentials associated with descriptor */\r | |
66 | struct fileops {\r | |
67 | int (*fo_read) __P((struct file *fp, struct uio *uio,\r | |
68 | struct ucred *cred, int flags));\r | |
69 | int (*fo_write) __P((struct file *fp, struct uio *uio,\r | |
70 | struct ucred *cred, int flags));\r | |
71 | #define FOF_OFFSET 1\r | |
72 | int (*fo_ioctl) __P((struct file *fp, u_long com,\r | |
73 | caddr_t data, struct proc *p));\r | |
74 | int (*fo_poll) __P((struct file *fp, int events,\r | |
75 | struct ucred *cred, struct proc *p));\r | |
76 | int (*fo_close) __P((struct file *fp, struct proc *p));\r | |
77 | } *f_ops;\r | |
78 | int f_seqcount; /*\r | |
79 | * count of sequential accesses -- cleared\r | |
80 | * by most seek operations.\r | |
81 | */\r | |
82 | off_t f_nextread; /*\r | |
83 | * offset of next expected read\r | |
84 | */\r | |
85 | off_t f_offset;\r | |
86 | caddr_t f_data; /* vnode or socket */\r | |
87 | };\r | |
88 | \r | |
89 | #ifdef MALLOC_DECLARE\r | |
90 | MALLOC_DECLARE(M_FILE);\r | |
91 | #endif\r | |
92 | \r | |
93 | LIST_HEAD(filelist, file);\r | |
94 | extern struct filelist filehead; /* head of list of open files */\r | |
95 | extern struct fileops vnops;\r | |
96 | extern int maxfiles; /* kernel limit on number of open files */\r | |
97 | extern int maxfilesperproc; /* per process limit on number of open files */\r | |
98 | extern int nfiles; /* actual number of open files */\r | |
99 | \r | |
100 | #endif /* KERNEL */\r | |
101 | \r | |
102 | #endif /* !SYS_FILE_H */\r |