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