1 /* $NetBSD: tty_60.c,v 1.4 2015/10/22 15:18:25 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Alan Barrett 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 __KERNEL_RCSID(0, "$NetBSD: tty_60.c,v 1.4 2015/10/22 15:18:25 christos Exp $"); 34 35 #if defined(_KERNEL_OPT) 36 #include "opt_compat_netbsd.h" 37 #endif 38 39 #include <sys/types.h> 40 41 #include <sys/conf.h> 42 #include <sys/errno.h> 43 #include <sys/systm.h> 44 45 #include <sys/tty.h> 46 #include <compat/sys/ttycom.h> 47 48 #ifdef COMPAT_60 49 50 /* convert struct ptmget to struct compat_60_ptmget */ 51 static int 52 ptmget_to_ptmget60(struct ptmget *pg, struct compat_60_ptmget *pg60) 53 { 54 memset(pg60, 0, sizeof(*pg60)); 55 pg60->cfd = pg->cfd; 56 pg60->sfd = pg->sfd; 57 strlcpy(pg60->cn, pg->cn, sizeof(pg60->cn)); 58 strlcpy(pg60->sn, pg->sn, sizeof(pg60->sn)); 59 if (strlen(pg->cn) >= sizeof(pg60->cn) 60 || strlen(pg->sn) >= sizeof(pg60->sn)) 61 return E2BIG; 62 return 0; 63 } 64 65 /* Helper for compat ioctls that use struct compat_60_ptmget. */ 66 static int 67 compat_60_ptmget_ioctl(dev_t dev, u_long cmd, void *data, int flag, 68 struct lwp *l) 69 { 70 int ret; 71 u_long newcmd; 72 struct ptmget pg; 73 const struct cdevsw *cd = cdevsw_lookup(dev); 74 75 if (cd == NULL || cd->d_ioctl == NULL) 76 return ENXIO; 77 78 switch (cmd) { 79 case COMPAT_60_TIOCPTMGET: newcmd = TIOCPTMGET; break; 80 case COMPAT_60_TIOCPTSNAME: newcmd = TIOCPTSNAME; break; 81 default: return ENOTTY; 82 } 83 84 ret = (cd->d_ioctl)(dev, newcmd, &pg, flag, l); 85 if (ret != 0) 86 return ret; 87 ret = ptmget_to_ptmget60(&pg, data); 88 return ret; 89 } 90 91 /* 92 * COMPAT_60 versions of ttioctl and ptmioctl. 93 */ 94 int 95 compat_60_ttioctl(struct tty *tp, u_long cmd, void *data, int flag, 96 struct lwp *l) 97 { 98 99 switch (cmd) { 100 case COMPAT_60_TIOCPTMGET: 101 case COMPAT_60_TIOCPTSNAME: 102 return compat_60_ptmget_ioctl(tp->t_dev, cmd, data, flag, l); 103 default: 104 return EPASSTHROUGH; 105 } 106 } 107 108 int 109 compat_60_ptmioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l) 110 { 111 112 switch (cmd) { 113 case COMPAT_60_TIOCPTMGET: 114 return compat_60_ptmget_ioctl(dev, cmd, data, flag, l); 115 default: 116 return EPASSTHROUGH; 117 } 118 } 119 120 #endif /* COMPAT_60 */ 121