1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software donated to Berkeley by 6 * Jan-Simon Pendry. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)fdesc.h 8.5 (Berkeley) 01/21/94 11 * 12 * $Id: fdesc.h,v 1.8 1993/04/06 15:28:33 jsp Exp $ 13 */ 14 15 #ifdef KERNEL 16 struct fdescmount { 17 struct vnode *f_root; /* Root node */ 18 }; 19 20 #define FD_ROOT 2 21 #define FD_DEVFD 3 22 #define FD_STDIN 4 23 #define FD_STDOUT 5 24 #define FD_STDERR 6 25 #define FD_CTTY 7 26 #define FD_DESC 8 27 #define FD_MAX 12 28 29 typedef enum { 30 Froot, 31 Fdevfd, 32 Fdesc, 33 Flink, 34 Fctty 35 } fdntype; 36 37 struct fdescnode { 38 struct fdescnode *fd_forw; /* Hash chain */ 39 struct fdescnode *fd_back; 40 struct vnode *fd_vnode; /* Back ptr to vnode */ 41 fdntype fd_type; /* Type of this node */ 42 unsigned fd_fd; /* Fd to be dup'ed */ 43 char *fd_link; /* Link to fd/n */ 44 int fd_ix; /* filesystem index */ 45 }; 46 47 #define VFSTOFDESC(mp) ((struct fdescmount *)((mp)->mnt_data)) 48 #define VTOFDESC(vp) ((struct fdescnode *)(vp)->v_data) 49 50 extern dev_t devctty; 51 extern int fdesc_init __P((void)); 52 extern int fdesc_root __P((struct mount *, struct vnode **)); 53 extern int fdesc_allocvp __P((fdntype, int, struct mount *, struct vnode **)); 54 extern int (**fdesc_vnodeop_p)(); 55 extern struct vfsops fdesc_vfsops; 56 #endif /* KERNEL */ 57