1 /* $NetBSD: tty_60.c,v 1.8 2019/03/01 11:06:56 pgoyette 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 1.8 2019/03/01 11:06:56 pgoyette 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 #include <sys/compat_stub.h> 45 46 #include <sys/tty.h> 47 48 #include <compat/common/compat_mod.h> 49 #include <compat/sys/ttycom.h> 50 51 /* convert struct ptmget to struct compat_60_ptmget */ 52 static int 53 ptmget_to_ptmget60(struct ptmget *pg, struct compat_60_ptmget *pg60) 54 { 55 memset(pg60, 0, sizeof(*pg60)); 56 pg60->cfd = pg->cfd; 57 pg60->sfd = pg->sfd; 58 strlcpy(pg60->cn, pg->cn, sizeof(pg60->cn)); 59 strlcpy(pg60->sn, pg->sn, sizeof(pg60->sn)); 60 if (strlen(pg->cn) >= sizeof(pg60->cn) 61 || strlen(pg->sn) >= sizeof(pg60->sn)) 62 return E2BIG; 63 return 0; 64 } 65 66 /* Helper for compat ioctls that use struct compat_60_ptmget. */ 67 static int 68 compat_60_ptmget_ioctl(dev_t dev, u_long cmd, void *data, int flag, 69 struct lwp *l) 70 { 71 int ret; 72 u_long newcmd; 73 struct ptmget pg; 74 const struct cdevsw *cd = cdevsw_lookup(dev); 75 76 if (cd == NULL || cd->d_ioctl == NULL) 77 return ENXIO; 78 79 switch (cmd) { 80 case COMPAT_60_TIOCPTMGET: newcmd = TIOCPTMGET; break; 81 case COMPAT_60_TIOCPTSNAME: newcmd = TIOCPTSNAME; break; 82 default: return ENOTTY; 83 } 84 85 ret = (cd->d_ioctl)(dev, newcmd, &pg, flag, l); 86 if (ret != 0) 87 return ret; 88 ret = ptmget_to_ptmget60(&pg, data); 89 return ret; 90 } 91 92 /* 93 * COMPAT_60 versions of ttioctl and ptmioctl. 94 */ 95 int 96 compat_60_ttioctl(struct tty *tp, u_long cmd, void *data, int flag, 97 struct lwp *l) 98 { 99 100 switch (cmd) { 101 case COMPAT_60_TIOCPTMGET: 102 case COMPAT_60_TIOCPTSNAME: 103 return compat_60_ptmget_ioctl(tp->t_dev, cmd, data, flag, l); 104 default: 105 return EPASSTHROUGH; 106 } 107 } 108 109 int 110 compat_60_ptmioctl(dev_t dev, u_long cmd, void *data, int flag, 111 struct lwp *l) 112 { 113 114 switch (cmd) { 115 case COMPAT_60_TIOCPTMGET: 116 return compat_60_ptmget_ioctl(dev, cmd, data, flag, l); 117 default: 118 return EPASSTHROUGH; 119 } 120 } 121 122 void 123 kern_tty_60_init(void) 124 { 125 126 MODULE_HOOK_SET(tty_ttioctl_60_hook, "tty_60", compat_60_ttioctl); 127 MODULE_HOOK_SET(tty_ptmioctl_60_hook, "tty_60", compat_60_ptmioctl); 128 } 129 130 void 131 kern_tty_60_fini(void) 132 { 133 MODULE_HOOK_UNSET(tty_ttioctl_60_hook); 134 MODULE_HOOK_UNSET(tty_ptmioctl_60_hook); 135 } 136