1/*	$NetBSD: fdesc.h,v 1.23 2020/01/17 20:08:09 ad Exp $	*/
 2
 3/*
 4 * Copyright (c) 1992, 1993
 5 *	The Regents of the University of California.  All rights reserved.
 6 *
 7 * This code is derived from software donated to Berkeley by
 8 * Jan-Simon Pendry.
 9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 *	@(#)fdesc.h	8.8 (Berkeley) 4/3/95
35 *
36 * #Id: fdesc.h,v 1.8 1993/04/06 15:28:33 jsp Exp #
37 */
38
39#ifdef _KERNEL
40
41#define FD_ROOT		2
42#define FD_DEVFD	3
43#define FD_STDIN	4
44#define FD_STDOUT	5
45#define FD_STDERR	6
46#define FD_CTTY		7
47#define FD_DESC		8
48#define FD_MAX		12
49
50typedef enum {
51	Froot,
52	Fdevfd,
53	Fdesc,
54	Flink,
55	Fctty
56} fdntype;
57
58struct fdescnode {
59	struct vnode	*fd_vnode;	/* Back ptr to vnode */
60	fdntype		fd_type;	/* Type of this node */
61	unsigned	fd_fd;		/* Fd to be dup'ed */
62	const char	*fd_link;	/* Link to fd/n */
63	int		fd_ix;		/* filesystem index */
64};
65
66#define	VTOFDESC(vp) ((struct fdescnode *)(vp)->v_data)
67
68#define FDESC_MAXNAMLEN	255
69
70extern dev_t devctty;
71extern void fdesc_init(void);
72extern void fdesc_done(void);
73extern int fdesc_root(struct mount *, int, struct vnode **);
74extern int fdesc_allocvp(fdntype, int, struct mount *, struct vnode **);
75extern int (**fdesc_vnodeop_p)(void *);
76extern struct vfsops fdesc_vfsops;
77
78#endif /* _KERNEL */