1 /* $NetBSD: ptyfs.c,v 1.4 2008/01/24 17:32:58 ad 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __RCSID("$NetBSD: ptyfs.c,v 1.4 2008/01/24 17:32:58 ad Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/types.h> 44 #include <sys/time.h> 45 #include <sys/proc.h> 46 #include <sys/stat.h> 47 #include <sys/vnode.h> 48 #include <sys/mount.h> 49 50 #include <stdbool.h> 51 52 #define _KERNEL 53 #include <miscfs/specfs/specdev.h> 54 #include <fs/ptyfs/ptyfs.h> 55 #undef _KERNEL 56 57 #include <paths.h> 58 #include <err.h> 59 #include <kvm.h> 60 #include <dirent.h> 61 #include "fstat.h" 62 63 int 64 ptyfs_filestat(struct vnode *vp, struct filestat *fsp) 65 { 66 struct ptyfsnode pn; 67 struct specnode sn; 68 struct mount mt; 69 70 if (!KVM_READ(VTOPTYFS(vp), &pn, sizeof(pn))) { 71 dprintf("can't read ptyfs_node at %p for pid %d", 72 VTOPTYFS(vp), Pid); 73 return 0; 74 } 75 if (!KVM_READ(vp->v_mount, &mt, sizeof(mt))) { 76 dprintf("can't read mount at %p for pid %d", 77 VTOPTYFS(vp), Pid); 78 return 0; 79 } 80 fsp->fsid = mt.mnt_stat.f_fsidx.__fsid_val[0]; 81 fsp->fileid = (long)pn.ptyfs_fileno; 82 fsp->mode = pn.ptyfs_mode; 83 fsp->size = 0; 84 switch (pn.ptyfs_type) { 85 case PTYFSpts: 86 case PTYFSptc: 87 if (!KVM_READ(vp->v_specnode, &sn, sizeof(sn))) { 88 dprintf("can't read specnode at %p for pid %d", 89 vp->v_specnode, Pid); 90 return 0; 91 } 92 fsp->rdev = sn.sn_rdev; 93 fsp->mode |= S_IFCHR; 94 break; 95 case PTYFSroot: 96 fsp->rdev = 0; 97 fsp->mode |= S_IFDIR; 98 break; 99 } 100 101 return 1; 102 } 103