1 /* 2 * Copyright (c) 1982, 1986, 1989 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)file.h 7.7 (Berkeley) 03/17/91 8 */ 9 10 #include <sys/fcntl.h> 11 #include <sys/unistd.h> 12 13 #ifdef KERNEL 14 /* 15 * Kernel descriptor table entry; 16 * one for each open kernel vnode and socket. 17 */ 18 struct file { 19 int f_flag; /* see below */ 20 #define DTYPE_VNODE 1 /* file */ 21 #define DTYPE_SOCKET 2 /* communications endpoint */ 22 short f_type; /* descriptor type */ 23 short f_count; /* reference count */ 24 short f_msgcount; /* references from message queue */ 25 struct ucred *f_cred; /* credentials associated with descriptor */ 26 struct fileops { 27 int (*fo_read)(); 28 int (*fo_write)(); 29 int (*fo_ioctl)(); 30 int (*fo_select)(); 31 int (*fo_close)(); 32 } *f_ops; 33 caddr_t f_data; /* inode */ 34 off_t f_offset; 35 }; 36 37 struct file *file, *fileNFILE; 38 int nfile; 39 40 #endif /* KERNEL */ 41