1/*	$NetBSD: ptyfs.c,v 1.7 2017/06/09 00:13:29 chs Exp $	*/
2
3/*-
4 * Copyright (c) 2004 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__RCSID("$NetBSD: ptyfs.c,v 1.7 2017/06/09 00:13:29 chs Exp $");
34
35#include <sys/param.h>
36#include <sys/types.h>
37#include <sys/time.h>
38#include <sys/proc.h>
39#include <sys/stat.h>
40#include <sys/vnode.h>
41#define __EXPOSE_MOUNT
42#include <sys/mount.h>
43
44#include <stdbool.h>
45
46#define _KERNEL
47#include <miscfs/specfs/specdev.h>
48#include <fs/ptyfs/ptyfs.h>
49#undef _KERNEL
50
51#include <paths.h>
52#include <err.h>
53#include <kvm.h>
54#include <dirent.h>
55#include "fstat.h"
56
57int
58ptyfs_filestat(struct vnode *vp, struct filestat *fsp)
59{
60	struct ptyfsnode pn;
61	struct specnode sn;
62	struct mount mt;
63
64	if (!KVM_READ(VTOPTYFS(vp), &pn, sizeof(pn))) {
65		dprintf("can't read ptyfs_node at %p for pid %d",
66		    VTOPTYFS(vp), Pid);
67		return 0;
68	}
69	if (!KVM_READ(vp->v_mount, &mt, sizeof(mt))) {
70		dprintf("can't read mount at %p for pid %d",
71		    VTOPTYFS(vp), Pid);
72		return 0;
73	}
74	fsp->fsid = mt.mnt_stat.f_fsidx.__fsid_val[0];
75	fsp->fileid = pn.ptyfs_fileno;
76	fsp->mode = pn.ptyfs_mode;
77	fsp->size = 0;
78	switch (pn.ptyfs_type) {
79	    case PTYFSpts:
80	    case PTYFSptc:
81		if (!KVM_READ(vp->v_specnode, &sn, sizeof(sn))) {
82			dprintf("can't read specnode at %p for pid %d",
83				vp->v_specnode, Pid);
84			return 0;
85		}
86		fsp->rdev = sn.sn_rdev;
87		fsp->mode |= S_IFCHR;
88		break;
89	    case PTYFSroot:
90		fsp->rdev = 0;
91		fsp->mode |= S_IFDIR;
92		break;
93	}
94
95	return 1;
96}
97