1 /* $NetBSD: ptyfs.c,v 1.6 2009/04/12 06:36:12 lukem 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 1.6 2009/04/12 06:36:12 lukem 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 #include <sys/mount.h> 42 43 #include <stdbool.h> 44 45 #define _KERNEL 46 #include <miscfs/specfs/specdev.h> 47 #include <fs/ptyfs/ptyfs.h> 48 #undef _KERNEL 49 50 #include <paths.h> 51 #include <err.h> 52 #include <kvm.h> 53 #include <dirent.h> 54 #include "fstat.h" 55 56 int 57 ptyfs_filestat(struct vnode *vp, struct filestat *fsp) 58 { 59 struct ptyfsnode pn; 60 struct specnode sn; 61 struct mount mt; 62 63 if (!KVM_READ(VTOPTYFS(vp), &pn, sizeof(pn))) { 64 dprintf("can't read ptyfs_node at %p for pid %d", 65 VTOPTYFS(vp), Pid); 66 return 0; 67 } 68 if (!KVM_READ(vp->v_mount, &mt, sizeof(mt))) { 69 dprintf("can't read mount at %p for pid %d", 70 VTOPTYFS(vp), Pid); 71 return 0; 72 } 73 fsp->fsid = mt.mnt_stat.f_fsidx.__fsid_val[0]; 74 fsp->fileid = pn.ptyfs_fileno; 75 fsp->mode = pn.ptyfs_mode; 76 fsp->size = 0; 77 switch (pn.ptyfs_type) { 78 case PTYFSpts: 79 case PTYFSptc: 80 if (!KVM_READ(vp->v_specnode, &sn, sizeof(sn))) { 81 dprintf("can't read specnode at %p for pid %d", 82 vp->v_specnode, Pid); 83 return 0; 84 } 85 fsp->rdev = sn.sn_rdev; 86 fsp->mode |= S_IFCHR; 87 break; 88 case PTYFSroot: 89 fsp->rdev = 0; 90 fsp->mode |= S_IFDIR; 91 break; 92 } 93 94 return 1; 95 } 96