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
57 int
ptyfs_filestat(struct vnode * vp,struct filestat * fsp)58 ptyfs_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