xref: /netbsd/sys/compat/linux/common/linux_termios.c (revision bf9ec67e)
1 /*	$NetBSD: linux_termios.c,v 1.15 2001/12/19 15:20:16 augustss Exp $	*/
2 
3 /*-
4  * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Frank van der Linden and Eric Haszlakiewicz.
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 __KERNEL_RCSID(0, "$NetBSD: linux_termios.c,v 1.15 2001/12/19 15:20:16 augustss Exp $");
41 
42 #include <sys/param.h>
43 #include <sys/proc.h>
44 #include <sys/systm.h>
45 #include <sys/file.h>
46 #include <sys/filedesc.h>
47 #include <sys/ioctl.h>
48 #include <sys/mount.h>
49 #include <sys/termios.h>
50 
51 #include <sys/syscallargs.h>
52 
53 #include <compat/linux/common/linux_types.h>
54 #include <compat/linux/common/linux_ioctl.h>
55 #include <compat/linux/common/linux_signal.h>
56 #include <compat/linux/common/linux_util.h>
57 #include <compat/linux/common/linux_termios.h>
58 
59 #include <compat/linux/linux_syscallargs.h>
60 
61 static speed_t linux_speeds[] = {
62 	0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
63 	9600, 19200, 38400, 57600, 115200, 230400
64 };
65 
66 static const int linux_spmasks[] = {
67 	LINUX_B0, LINUX_B50, LINUX_B75, LINUX_B110, LINUX_B134, LINUX_B150,
68 	LINUX_B200, LINUX_B300, LINUX_B600, LINUX_B1200, LINUX_B1800,
69 	LINUX_B2400, LINUX_B4800, LINUX_B9600, LINUX_B19200, LINUX_B38400,
70 	LINUX_B57600, LINUX_B115200, LINUX_B230400
71 };
72 
73 
74 static void linux_termio_to_bsd_termios __P((struct linux_termio *,
75 					     struct termios *));
76 static void bsd_termios_to_linux_termio __P((struct termios *,
77 					     struct linux_termio *));
78 static void linux_termios_to_bsd_termios __P((struct linux_termios *,
79 					      struct termios *));
80 static void bsd_termios_to_linux_termios __P((struct termios *,
81 					      struct linux_termios *));
82 
83 /*
84  * Deal with termio ioctl cruft. This doesn't look very good..
85  * XXX too much code duplication, obviously..
86  *
87  * The conversion routines between Linux and BSD structures assume
88  * that the fields are already filled with the current values,
89  * so that fields present in BSD but not in Linux keep their current
90  * values.
91  */
92 
93 static void
94 linux_termio_to_bsd_termios(lt, bts)
95 	struct linux_termio *lt;
96 	struct termios *bts;
97 {
98 	int index;
99 
100 	bts->c_iflag = 0;
101 	bts->c_iflag |= cvtto_bsd_mask(lt->c_iflag, LINUX_IGNBRK, IGNBRK);
102 	bts->c_iflag |= cvtto_bsd_mask(lt->c_iflag, LINUX_BRKINT, BRKINT);
103 	bts->c_iflag |= cvtto_bsd_mask(lt->c_iflag, LINUX_IGNPAR, IGNPAR);
104 	bts->c_iflag |= cvtto_bsd_mask(lt->c_iflag, LINUX_INPCK, INPCK);
105 	bts->c_iflag |= cvtto_bsd_mask(lt->c_iflag, LINUX_ISTRIP, ISTRIP);
106 	bts->c_iflag |= cvtto_bsd_mask(lt->c_iflag, LINUX_INLCR, INLCR);
107 	bts->c_iflag |= cvtto_bsd_mask(lt->c_iflag, LINUX_IGNCR, IGNCR);
108 	bts->c_iflag |= cvtto_bsd_mask(lt->c_iflag, LINUX_ICRNL, ICRNL);
109 	bts->c_iflag |= cvtto_bsd_mask(lt->c_iflag, LINUX_IXON, IXON);
110 	bts->c_iflag |= cvtto_bsd_mask(lt->c_iflag, LINUX_IXANY, IXANY);
111 	bts->c_iflag |= cvtto_bsd_mask(lt->c_iflag, LINUX_IXOFF, IXOFF);
112 	bts->c_iflag |= cvtto_bsd_mask(lt->c_iflag, LINUX_IMAXBEL, IMAXBEL);
113 
114 	bts->c_oflag = 0;
115 	bts->c_oflag |= cvtto_bsd_mask(lt->c_oflag, LINUX_OPOST, OPOST);
116 	bts->c_oflag |= cvtto_bsd_mask(lt->c_oflag, LINUX_ONLCR, ONLCR);
117 	bts->c_oflag |= cvtto_bsd_mask(lt->c_oflag, LINUX_XTABS, OXTABS);
118 
119 	/*
120 	 * This could have been:
121 	 * bts->c_cflag = (lt->c_flag & LINUX_CSIZE) << 4
122 	 * But who knows, those values might perhaps change one day.
123 	 */
124 	switch (lt->c_cflag & LINUX_CSIZE) {
125 	case LINUX_CS5:
126 		bts->c_cflag = CS5;
127 		break;
128 	case LINUX_CS6:
129 		bts->c_cflag = CS6;
130 		break;
131 	case LINUX_CS7:
132 		bts->c_cflag = CS7;
133 		break;
134 	case LINUX_CS8:
135 		bts->c_cflag = CS8;
136 		break;
137 	}
138 	bts->c_cflag |= cvtto_bsd_mask(lt->c_cflag, LINUX_CSTOPB, CSTOPB);
139 	bts->c_cflag |= cvtto_bsd_mask(lt->c_cflag, LINUX_CREAD, CREAD);
140 	bts->c_cflag |= cvtto_bsd_mask(lt->c_cflag, LINUX_PARENB, PARENB);
141 	bts->c_cflag |= cvtto_bsd_mask(lt->c_cflag, LINUX_PARODD, PARODD);
142 	bts->c_cflag |= cvtto_bsd_mask(lt->c_cflag, LINUX_HUPCL, HUPCL);
143 	bts->c_cflag |= cvtto_bsd_mask(lt->c_cflag, LINUX_CLOCAL, CLOCAL);
144 	bts->c_cflag |= cvtto_bsd_mask(lt->c_cflag, LINUX_CRTSCTS, CRTSCTS);
145 
146 	bts->c_lflag = 0;
147 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_ISIG, ISIG);
148 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_ICANON, ICANON);
149 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_ECHO, ECHO);
150 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_ECHOE, ECHOE);
151 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_ECHOK, ECHOK);
152 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_ECHONL, ECHONL);
153 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_NOFLSH, NOFLSH);
154 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_TOSTOP, TOSTOP);
155 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_ECHOCTL, ECHOCTL);
156 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_ECHOPRT, ECHOPRT);
157 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_ECHOKE, ECHOKE);
158 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_FLUSHO, FLUSHO);
159 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_PENDIN, PENDIN);
160 	bts->c_lflag |= cvtto_bsd_mask(lt->c_lflag, LINUX_IEXTEN, IEXTEN);
161 
162 	index = lt->c_cflag & LINUX_CBAUD;
163 	if (index & LINUX_CBAUDEX)
164 		index = (index & ~LINUX_CBAUDEX) + LINUX_NSPEEDS - 1;
165 	bts->c_ispeed = bts->c_ospeed = linux_speeds[index];
166 
167 	bts->c_cc[VINTR] = lt->c_cc[LINUX_OLD_VINTR];
168 	bts->c_cc[VQUIT] = lt->c_cc[LINUX_OLD_VQUIT];
169 	bts->c_cc[VERASE] = lt->c_cc[LINUX_OLD_VERASE];
170 	bts->c_cc[VKILL] = lt->c_cc[LINUX_OLD_VKILL];
171 	bts->c_cc[VEOF] = lt->c_cc[LINUX_OLD_VEOF];
172 	bts->c_cc[VTIME] = lt->c_cc[LINUX_OLD_VTIME];
173 	bts->c_cc[VMIN] = lt->c_cc[LINUX_OLD_VMIN];
174 }
175 
176 static void
177 bsd_termios_to_linux_termio(bts, lt)
178 	struct termios *bts;
179 	struct linux_termio *lt;
180 {
181 	int i, mask;
182 
183 	lt->c_iflag = 0;
184 	lt->c_iflag |= cvtto_linux_mask(bts->c_iflag, IGNBRK, LINUX_IGNBRK);
185 	lt->c_iflag |= cvtto_linux_mask(bts->c_iflag, BRKINT, LINUX_BRKINT);
186 	lt->c_iflag |= cvtto_linux_mask(bts->c_iflag, IGNPAR, LINUX_IGNPAR);
187 	lt->c_iflag |= cvtto_linux_mask(bts->c_iflag, INPCK, LINUX_INPCK);
188 	lt->c_iflag |= cvtto_linux_mask(bts->c_iflag, ISTRIP, LINUX_ISTRIP);
189 	lt->c_iflag |= cvtto_linux_mask(bts->c_iflag, INLCR, LINUX_INLCR);
190 	lt->c_iflag |= cvtto_linux_mask(bts->c_iflag, IGNCR, LINUX_IGNCR);
191 	lt->c_iflag |= cvtto_linux_mask(bts->c_iflag, ICRNL, LINUX_ICRNL);
192 	lt->c_iflag |= cvtto_linux_mask(bts->c_iflag, IXON, LINUX_IXON);
193 	lt->c_iflag |= cvtto_linux_mask(bts->c_iflag, IXANY, LINUX_IXANY);
194 	lt->c_iflag |= cvtto_linux_mask(bts->c_iflag, IXOFF, LINUX_IXOFF);
195 	lt->c_iflag |= cvtto_linux_mask(bts->c_iflag, IMAXBEL, LINUX_IMAXBEL);
196 
197 	lt->c_oflag = 0;
198 	lt->c_oflag |= cvtto_linux_mask(bts->c_oflag, OPOST, LINUX_OPOST);
199 	lt->c_oflag |= cvtto_linux_mask(bts->c_oflag, ONLCR, LINUX_ONLCR);
200 	lt->c_oflag |= cvtto_linux_mask(bts->c_oflag, OXTABS, LINUX_XTABS);
201 
202 	switch (bts->c_cflag & CSIZE) {
203 	case CS5:
204 		lt->c_cflag = LINUX_CS5;
205 		break;
206 	case CS6:
207 		lt->c_cflag = LINUX_CS6;
208 		break;
209 	case CS7:
210 		lt->c_cflag = LINUX_CS7;
211 		break;
212 	case CS8:
213 		lt->c_cflag = LINUX_CS8;
214 		break;
215 	}
216 	lt->c_cflag |= cvtto_linux_mask(bts->c_cflag, CSTOPB, LINUX_CSTOPB);
217 	lt->c_cflag |= cvtto_linux_mask(bts->c_cflag, CREAD, LINUX_CREAD);
218 	lt->c_cflag |= cvtto_linux_mask(bts->c_cflag, PARENB, LINUX_PARENB);
219 	lt->c_cflag |= cvtto_linux_mask(bts->c_cflag, PARODD, LINUX_PARODD);
220 	lt->c_cflag |= cvtto_linux_mask(bts->c_cflag, HUPCL, LINUX_HUPCL);
221 	lt->c_cflag |= cvtto_linux_mask(bts->c_cflag, CLOCAL, LINUX_CLOCAL);
222 	lt->c_cflag |= cvtto_linux_mask(bts->c_cflag, CRTSCTS, LINUX_CRTSCTS);
223 
224 	lt->c_lflag = 0;
225 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, ISIG, LINUX_ISIG);
226 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, ICANON, LINUX_ICANON);
227 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHO, LINUX_ECHO);
228 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHOE, LINUX_ECHOE);
229 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHOK, LINUX_ECHOK);
230 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHONL, LINUX_ECHONL);
231 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, NOFLSH, LINUX_NOFLSH);
232 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, TOSTOP, LINUX_TOSTOP);
233 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHOCTL, LINUX_ECHOCTL);
234 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHOPRT, LINUX_ECHOPRT);
235 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHOKE, LINUX_ECHOKE);
236 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, FLUSHO, LINUX_FLUSHO);
237 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, PENDIN, LINUX_PENDIN);
238 	lt->c_lflag |= cvtto_linux_mask(bts->c_lflag, IEXTEN, LINUX_IEXTEN);
239 
240 	mask = LINUX_B9600;	/* XXX default value should this be 0? */
241 	for (i = 0; i < sizeof (linux_speeds) / sizeof (speed_t); i++) {
242 		if (bts->c_ospeed == linux_speeds[i]) {
243 			mask = linux_spmasks[i];
244 			break;
245 		}
246 	}
247 	lt->c_cflag |= mask;
248 
249 	lt->c_cc[LINUX_VINTR] = bts->c_cc[VINTR];
250 	lt->c_cc[LINUX_VQUIT] = bts->c_cc[VQUIT];
251 	lt->c_cc[LINUX_VERASE] = bts->c_cc[VERASE];
252 	lt->c_cc[LINUX_VKILL] = bts->c_cc[VKILL];
253 	lt->c_cc[LINUX_VEOF] = bts->c_cc[VEOF];
254 	lt->c_cc[LINUX_VTIME] = bts->c_cc[VTIME];
255 	lt->c_cc[LINUX_VMIN] = bts->c_cc[VMIN];
256 	lt->c_cc[LINUX_VSWTC] = 0;
257 
258 	/* XXX should be fixed someday */
259 	lt->c_line = 0;
260 }
261 
262 static void
263 linux_termios_to_bsd_termios(lts, bts)
264 	struct linux_termios *lts;
265 	struct termios *bts;
266 {
267 	int index;
268 
269 	bts->c_iflag = 0;
270 	bts->c_iflag |= cvtto_bsd_mask(lts->c_iflag, LINUX_IGNBRK, IGNBRK);
271 	bts->c_iflag |= cvtto_bsd_mask(lts->c_iflag, LINUX_BRKINT, BRKINT);
272 	bts->c_iflag |= cvtto_bsd_mask(lts->c_iflag, LINUX_IGNPAR, IGNPAR);
273 	bts->c_iflag |= cvtto_bsd_mask(lts->c_iflag, LINUX_INPCK, INPCK);
274 	bts->c_iflag |= cvtto_bsd_mask(lts->c_iflag, LINUX_ISTRIP, ISTRIP);
275 	bts->c_iflag |= cvtto_bsd_mask(lts->c_iflag, LINUX_INLCR, INLCR);
276 	bts->c_iflag |= cvtto_bsd_mask(lts->c_iflag, LINUX_IGNCR, IGNCR);
277 	bts->c_iflag |= cvtto_bsd_mask(lts->c_iflag, LINUX_ICRNL, ICRNL);
278 	bts->c_iflag |= cvtto_bsd_mask(lts->c_iflag, LINUX_IXON, IXON);
279 	bts->c_iflag |= cvtto_bsd_mask(lts->c_iflag, LINUX_IXANY, IXANY);
280 	bts->c_iflag |= cvtto_bsd_mask(lts->c_iflag, LINUX_IXOFF, IXOFF);
281 	bts->c_iflag |= cvtto_bsd_mask(lts->c_iflag, LINUX_IMAXBEL, IMAXBEL);
282 
283 	bts->c_oflag = 0;
284 	bts->c_oflag |= cvtto_bsd_mask(lts->c_oflag, LINUX_OPOST, OPOST);
285 	bts->c_oflag |= cvtto_bsd_mask(lts->c_oflag, LINUX_ONLCR, ONLCR);
286 	bts->c_oflag |= cvtto_bsd_mask(lts->c_oflag, LINUX_XTABS, OXTABS);
287 
288 	bts->c_cflag = 0;
289 	switch (lts->c_cflag & LINUX_CSIZE) {
290 	case LINUX_CS5:
291 		bts->c_cflag = CS5;
292 		break;
293 	case LINUX_CS6:
294 		bts->c_cflag = CS6;
295 		break;
296 	case LINUX_CS7:
297 		bts->c_cflag = CS7;
298 		break;
299 	case LINUX_CS8:
300 		bts->c_cflag = CS8;
301 		break;
302 	}
303 	bts->c_cflag |= cvtto_bsd_mask(lts->c_cflag, LINUX_CSTOPB, CSTOPB);
304 	bts->c_cflag |= cvtto_bsd_mask(lts->c_cflag, LINUX_CREAD, CREAD);
305 	bts->c_cflag |= cvtto_bsd_mask(lts->c_cflag, LINUX_PARENB, PARENB);
306 	bts->c_cflag |= cvtto_bsd_mask(lts->c_cflag, LINUX_PARODD, PARODD);
307 	bts->c_cflag |= cvtto_bsd_mask(lts->c_cflag, LINUX_HUPCL, HUPCL);
308 	bts->c_cflag |= cvtto_bsd_mask(lts->c_cflag, LINUX_CLOCAL, CLOCAL);
309 	bts->c_cflag |= cvtto_bsd_mask(lts->c_cflag, LINUX_CRTSCTS, CRTSCTS);
310 
311 	bts->c_lflag = 0;
312 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_ISIG, ISIG);
313 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_ICANON, ICANON);
314 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_ECHO, ECHO);
315 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_ECHOE, ECHOE);
316 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_ECHOK, ECHOK);
317 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_ECHONL, ECHONL);
318 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_NOFLSH, NOFLSH);
319 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_TOSTOP, TOSTOP);
320 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_ECHOCTL, ECHOCTL);
321 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_ECHOPRT, ECHOPRT);
322 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_ECHOKE, ECHOKE);
323 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_FLUSHO, FLUSHO);
324 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_PENDIN, PENDIN);
325 	bts->c_lflag |= cvtto_bsd_mask(lts->c_lflag, LINUX_IEXTEN, IEXTEN);
326 
327 	index = lts->c_cflag & LINUX_CBAUD;
328 	if (index & LINUX_CBAUDEX)
329 		index = (index & ~LINUX_CBAUDEX) + LINUX_NSPEEDS - 1;
330 	bts->c_ispeed = bts->c_ospeed = linux_speeds[index];
331 	/*
332 	 * A null c_ospeed causes NetBSD to hangup the terminal.
333 	 * Linux does not do this, and it sets c_ospeed to zero
334 	 * sometimes. If it is null, we store -1 in the kernel
335 	 */
336 	if (bts->c_ospeed == 0)
337 		bts->c_ospeed = -1;
338 
339 	bts->c_cc[VINTR] = lts->c_cc[LINUX_VINTR];
340 	bts->c_cc[VQUIT] = lts->c_cc[LINUX_VQUIT];
341 	bts->c_cc[VERASE] = lts->c_cc[LINUX_VERASE];
342 	bts->c_cc[VKILL] = lts->c_cc[LINUX_VKILL];
343 	bts->c_cc[VEOF] = lts->c_cc[LINUX_VEOF];
344 	bts->c_cc[VTIME] = lts->c_cc[LINUX_VTIME];
345 	bts->c_cc[VMIN] = lts->c_cc[LINUX_VMIN];
346 	bts->c_cc[VEOL] = lts->c_cc[LINUX_VEOL];
347 	bts->c_cc[VEOL2] = lts->c_cc[LINUX_VEOL2];
348 	bts->c_cc[VWERASE] = lts->c_cc[LINUX_VWERASE];
349 	bts->c_cc[VSUSP] = lts->c_cc[LINUX_VSUSP];
350 	bts->c_cc[VSTART] = lts->c_cc[LINUX_VSTART];
351 	bts->c_cc[VSTOP] = lts->c_cc[LINUX_VSTOP];
352 	bts->c_cc[VLNEXT] = lts->c_cc[LINUX_VLNEXT];
353 	bts->c_cc[VDISCARD] = lts->c_cc[LINUX_VDISCARD];
354 	bts->c_cc[VREPRINT] = lts->c_cc[LINUX_VREPRINT];
355 }
356 
357 static void
358 bsd_termios_to_linux_termios(bts, lts)
359 	struct termios *bts;
360 	struct linux_termios *lts;
361 {
362 	int i, mask;
363 
364 	lts->c_iflag = 0;
365 	lts->c_iflag |= cvtto_linux_mask(bts->c_iflag, IGNBRK, LINUX_IGNBRK);
366 	lts->c_iflag |= cvtto_linux_mask(bts->c_iflag, BRKINT, LINUX_BRKINT);
367 	lts->c_iflag |= cvtto_linux_mask(bts->c_iflag, IGNPAR, LINUX_IGNPAR);
368 	lts->c_iflag |= cvtto_linux_mask(bts->c_iflag, INPCK, LINUX_INPCK);
369 	lts->c_iflag |= cvtto_linux_mask(bts->c_iflag, ISTRIP, LINUX_ISTRIP);
370 	lts->c_iflag |= cvtto_linux_mask(bts->c_iflag, INLCR, LINUX_INLCR);
371 	lts->c_iflag |= cvtto_linux_mask(bts->c_iflag, IGNCR, LINUX_IGNCR);
372 	lts->c_iflag |= cvtto_linux_mask(bts->c_iflag, ICRNL, LINUX_ICRNL);
373 	lts->c_iflag |= cvtto_linux_mask(bts->c_iflag, IXON, LINUX_IXON);
374 	lts->c_iflag |= cvtto_linux_mask(bts->c_iflag, IXANY, LINUX_IXANY);
375 	lts->c_iflag |= cvtto_linux_mask(bts->c_iflag, IXOFF, LINUX_IXOFF);
376 	lts->c_iflag |= cvtto_linux_mask(bts->c_iflag, IMAXBEL, LINUX_IMAXBEL);
377 
378 	lts->c_oflag = 0;
379 	lts->c_oflag |= cvtto_linux_mask(bts->c_oflag, OPOST, LINUX_OPOST);
380 	lts->c_oflag |= cvtto_linux_mask(bts->c_oflag, ONLCR, LINUX_ONLCR);
381 	lts->c_oflag |= cvtto_linux_mask(bts->c_oflag, OXTABS, LINUX_XTABS);
382 
383 	switch (bts->c_cflag & CSIZE) {
384 	case CS5:
385 		lts->c_cflag = LINUX_CS5;
386 		break;
387 	case CS6:
388 		lts->c_cflag = LINUX_CS6;
389 		break;
390 	case CS7:
391 		lts->c_cflag = LINUX_CS7;
392 		break;
393 	case CS8:
394 		lts->c_cflag = LINUX_CS8;
395 		break;
396 	}
397 	lts->c_cflag |= cvtto_linux_mask(bts->c_cflag, CS5, LINUX_CS5);
398 	lts->c_cflag |= cvtto_linux_mask(bts->c_cflag, CS6, LINUX_CS6);
399 	lts->c_cflag |= cvtto_linux_mask(bts->c_cflag, CS7, LINUX_CS7);
400 	lts->c_cflag |= cvtto_linux_mask(bts->c_cflag, CS8, LINUX_CS8);
401 	lts->c_cflag |= cvtto_linux_mask(bts->c_cflag, CSTOPB, LINUX_CSTOPB);
402 	lts->c_cflag |= cvtto_linux_mask(bts->c_cflag, CREAD, LINUX_CREAD);
403 	lts->c_cflag |= cvtto_linux_mask(bts->c_cflag, PARENB, LINUX_PARENB);
404 	lts->c_cflag |= cvtto_linux_mask(bts->c_cflag, PARODD, LINUX_PARODD);
405 	lts->c_cflag |= cvtto_linux_mask(bts->c_cflag, HUPCL, LINUX_HUPCL);
406 	lts->c_cflag |= cvtto_linux_mask(bts->c_cflag, CLOCAL, LINUX_CLOCAL);
407 	lts->c_cflag |= cvtto_linux_mask(bts->c_cflag, CRTSCTS, LINUX_CRTSCTS);
408 
409 	lts->c_lflag = 0;
410 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, ISIG, LINUX_ISIG);
411 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, ICANON, LINUX_ICANON);
412 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHO, LINUX_ECHO);
413 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHOE, LINUX_ECHOE);
414 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHOK, LINUX_ECHOK);
415 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHONL, LINUX_ECHONL);
416 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, NOFLSH, LINUX_NOFLSH);
417 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, TOSTOP, LINUX_TOSTOP);
418 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHOCTL, LINUX_ECHOCTL);
419 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHOPRT, LINUX_ECHOPRT);
420 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, ECHOKE, LINUX_ECHOKE);
421 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, FLUSHO, LINUX_FLUSHO);
422 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, PENDIN, LINUX_PENDIN);
423 	lts->c_lflag |= cvtto_linux_mask(bts->c_lflag, IEXTEN, LINUX_IEXTEN);
424 
425 	mask = LINUX_B9600;	/* XXX default value */
426 	for (i = 0; i < sizeof (linux_speeds) / sizeof (speed_t); i++) {
427 		if (bts->c_ospeed == linux_speeds[i]) {
428 			mask = linux_spmasks[i];
429 			break;
430 		}
431 	}
432 	/*
433 	 * A null c_ospeed causes NetBSD to hangup the terminal.
434 	 * Linux does not do this, and it sets c_ospeed to zero
435 	 * sometimes. If it is null, we store -1 in the kernel
436 	 */
437 	if (bts->c_ospeed == -1)
438 		bts->c_ospeed = 0;
439 	lts->c_cflag |= mask;
440 
441 	lts->c_cc[LINUX_VINTR] = bts->c_cc[VINTR];
442 	lts->c_cc[LINUX_VQUIT] = bts->c_cc[VQUIT];
443 	lts->c_cc[LINUX_VERASE] = bts->c_cc[VERASE];
444 	lts->c_cc[LINUX_VKILL] = bts->c_cc[VKILL];
445 	lts->c_cc[LINUX_VEOF] = bts->c_cc[VEOF];
446 	lts->c_cc[LINUX_VTIME] = bts->c_cc[VTIME];
447 	lts->c_cc[LINUX_VMIN] = bts->c_cc[VMIN];
448 	lts->c_cc[LINUX_VEOL] = bts->c_cc[VEOL];
449 	lts->c_cc[LINUX_VEOL2] = bts->c_cc[VEOL2];
450 	lts->c_cc[LINUX_VWERASE] = bts->c_cc[VWERASE];
451 	lts->c_cc[LINUX_VSUSP] = bts->c_cc[VSUSP];
452 	lts->c_cc[LINUX_VSTART] = bts->c_cc[VSTART];
453 	lts->c_cc[LINUX_VSTOP] = bts->c_cc[VSTOP];
454 	lts->c_cc[LINUX_VLNEXT] = bts->c_cc[VLNEXT];
455 	lts->c_cc[LINUX_VDISCARD] = bts->c_cc[VDISCARD];
456 	lts->c_cc[LINUX_VREPRINT] = bts->c_cc[VREPRINT];
457 	lts->c_cc[LINUX_VSWTC] = 0;
458 
459 	/* XXX should be fixed someday */
460 	lts->c_line = 0;
461 }
462 
463 int
464 linux_ioctl_termios(p, uap, retval)
465 	struct proc *p;
466 	struct linux_sys_ioctl_args /* {
467 		syscallarg(int) fd;
468 		syscallarg(u_long) com;
469 		syscallarg(caddr_t) data;
470 	} */ *uap;
471 	register_t *retval;
472 {
473 	struct file *fp;
474 	struct filedesc *fdp;
475 	u_long com;
476 	struct linux_termio tmplt;
477 	struct linux_termios tmplts;
478 	struct termios tmpbts;
479 	int idat;
480 	struct sys_ioctl_args ia;
481 	int error;
482 	char tioclinux;
483 	int (*bsdioctl) __P((struct file *, u_long, caddr_t, struct proc *));
484 
485 	fdp = p->p_fd;
486 	if ((fp = fd_getfile(fdp, SCARG(uap, fd))) == NULL)
487 		return (EBADF);
488 
489 	if ((fp->f_flag & (FREAD | FWRITE)) == 0)
490 		return (EBADF);
491 
492 	bsdioctl = fp->f_ops->fo_ioctl;
493 	com = SCARG(uap, com);
494 	retval[0] = 0;
495 
496 	switch (com) {
497 	case LINUX_TCGETS:
498 		error = (*bsdioctl)(fp, TIOCGETA, (caddr_t)&tmpbts, p);
499 		if (error)
500 			return error;
501 		bsd_termios_to_linux_termios(&tmpbts, &tmplts);
502 		error = copyout(&tmplts, SCARG(uap, data), sizeof tmplts);
503 		if (error)
504 			return error;
505 		return 0;
506 	case LINUX_TCSETS:
507 	case LINUX_TCSETSW:
508 	case LINUX_TCSETSF:
509 		/*
510 		 * First fill in all fields, so that we keep the current
511 		 * values for fields that Linux doesn't know about.
512 		 */
513 		error = (*bsdioctl)(fp, TIOCGETA, (caddr_t)&tmpbts, p);
514 		if (error)
515 			return error;
516 		error = copyin(SCARG(uap, data), &tmplts, sizeof tmplts);
517 		if (error)
518 			return error;
519 		linux_termios_to_bsd_termios(&tmplts, &tmpbts);
520 		switch (com) {
521 		case LINUX_TCSETS:
522 			com = TIOCSETA;
523 			break;
524 		case LINUX_TCSETSW:
525 			com = TIOCSETAW;
526 			break;
527 		case LINUX_TCSETSF:
528 			com = TIOCSETAF;
529 			break;
530 		}
531 		error = (*bsdioctl)(fp, com, (caddr_t)&tmpbts, p);
532 		if (error)
533 			return error;
534 		return 0;
535 	case LINUX_TCGETA:
536 		error = (*bsdioctl)(fp, TIOCGETA, (caddr_t)&tmpbts, p);
537 		if (error)
538 			return error;
539 		bsd_termios_to_linux_termio(&tmpbts, &tmplt);
540 		error = copyout(&tmplt, SCARG(uap, data), sizeof tmplt);
541 		if (error)
542 			return error;
543 		return 0;
544 	case LINUX_TCSETA:
545 	case LINUX_TCSETAW:
546 	case LINUX_TCSETAF:
547 		/*
548 		 * First fill in all fields, so that we keep the current
549 		 * values for fields that Linux doesn't know about.
550 		 */
551 		error = (*bsdioctl)(fp, TIOCGETA, (caddr_t)&tmpbts, p);
552 		if (error)
553 			return error;
554 		error = copyin(SCARG(uap, data), &tmplt, sizeof tmplt);
555 		if (error)
556 			return error;
557 		linux_termio_to_bsd_termios(&tmplt, &tmpbts);
558 		switch (com) {
559 		case LINUX_TCSETA:
560 			com = TIOCSETA;
561 			break;
562 		case LINUX_TCSETAW:
563 			com = TIOCSETAW;
564 			break;
565 		case LINUX_TCSETAF:
566 			com = TIOCSETAF;
567 			break;
568 		}
569 		error = (*bsdioctl)(fp, com, (caddr_t)&tmpbts, p);
570 		if (error)
571 			return error;
572 		return 0;
573 	case LINUX_TCFLSH:
574 		switch((u_long)SCARG(uap, data)) {
575 		case 0:
576 			idat = FREAD;
577 			break;
578 		case 1:
579 			idat = FWRITE;
580 			break;
581 		case 2:
582 			idat = 0;
583 			break;
584 		default:
585 			return EINVAL;
586 		}
587 		return (*bsdioctl)(fp, TIOCFLUSH, (caddr_t)&idat, p);
588 	case LINUX_TIOCGETD:
589 		error = (*bsdioctl)(fp, TIOCGETD, (caddr_t)&idat, p);
590 		if (error)
591 			return error;
592 		switch (idat) {
593 		case TTYDISC:
594 			idat = LINUX_N_TTY;
595 			break;
596 		case SLIPDISC:
597 			idat = LINUX_N_SLIP;
598 			break;
599 		case PPPDISC:
600 			idat = LINUX_N_PPP;
601 			break;
602 		case STRIPDISC:
603 			idat = LINUX_N_STRIP;
604 			break;
605 		/*
606 		 * Linux does not have the tablet line discipline.
607 		 */
608 		case TABLDISC:
609 		default:
610 			idat = -1;	/* XXX What should this be? */
611 			break;
612 		}
613 		error = copyout(&idat, SCARG(uap, data), sizeof idat);
614 		if (error)
615 			return error;
616 		return 0;
617 	case LINUX_TIOCSETD:
618 		error = copyin(SCARG(uap, data), &idat, sizeof idat);
619 		if (error)
620 			return error;
621 		switch (idat) {
622 		case LINUX_N_TTY:
623 			idat = TTYDISC;
624 			break;
625 		case LINUX_N_SLIP:
626 			idat = SLIPDISC;
627 			break;
628 		case LINUX_N_PPP:
629 			idat = PPPDISC;
630 			break;
631 		case LINUX_N_STRIP:
632 			idat = STRIPDISC;
633 			break;
634 		/*
635 		 * We can't handle the mouse line discipline Linux has.
636 		 */
637 		case LINUX_N_MOUSE:
638 		case LINUX_N_AX25:
639 		case LINUX_N_X25:
640 		case LINUX_N_6PACK:
641 		default:
642 			return EINVAL;
643 		}
644 		error = (*bsdioctl)(fp, TIOCSETD, (caddr_t)&idat, p);
645 		if (error)
646 			return error;
647 		return 0;
648 	case LINUX_TIOCLINUX:
649 		error = copyin(SCARG(uap, data), &tioclinux, sizeof tioclinux);
650 		if (error != 0)
651 			return error;
652 		switch (tioclinux) {
653 		case LINUX_TIOCLINUX_KERNMSG:
654 			/*
655 			 * XXX needed to not fail for some things. Could
656 			 * try to use TIOCCONS, but the char argument
657 			 * specifies the VT #, not an fd.
658 			 */
659 			return 0;
660 		case LINUX_TIOCLINUX_COPY:
661 		case LINUX_TIOCLINUX_PASTE:
662 		case LINUX_TIOCLINUX_UNBLANK:
663 		case LINUX_TIOCLINUX_LOADLUT:
664 		case LINUX_TIOCLINUX_READSHIFT:
665 		case LINUX_TIOCLINUX_READMOUSE:
666 		case LINUX_TIOCLINUX_VESABLANK:
667 		case LINUX_TIOCLINUX_CURCONS:	/* could use VT_GETACTIVE */
668 			return EINVAL;
669 		}
670 		break;
671 	case LINUX_TIOCGWINSZ:
672 		SCARG(&ia, com) = TIOCGWINSZ;
673 		break;
674 	case LINUX_TIOCSWINSZ:
675 		SCARG(&ia, com) = TIOCSWINSZ;
676 		break;
677 	case LINUX_TIOCGPGRP:
678 		SCARG(&ia, com) = TIOCGPGRP;
679 		break;
680 	case LINUX_TIOCSPGRP:
681 		SCARG(&ia, com) = TIOCSPGRP;
682 		break;
683 	case LINUX_FIONREAD:
684 		SCARG(&ia, com) = FIONREAD;
685 		break;
686 	case LINUX_FIONBIO:
687 		SCARG(&ia, com) = FIONBIO;
688 		break;
689 	case LINUX_FIOASYNC:
690 		SCARG(&ia, com) = FIOASYNC;
691 		break;
692 	case LINUX_TIOCEXCL:
693 		SCARG(&ia, com) = TIOCEXCL;
694 		break;
695 	case LINUX_TIOCNXCL:
696 		SCARG(&ia, com) = TIOCNXCL;
697 		break;
698 	case LINUX_TIOCCONS:
699 		SCARG(&ia, com) = TIOCCONS;
700 		break;
701 	case LINUX_TIOCNOTTY:
702 		SCARG(&ia, com) = TIOCNOTTY;
703 		break;
704 	case LINUX_TCSBRK:
705 		SCARG(&ia, com) = SCARG(uap, data) ? TIOCDRAIN : TIOCSBRK;
706 		break;
707 	case LINUX_TIOCMGET:
708 		SCARG(&ia, com) = TIOCMGET;
709 		break;
710 	case LINUX_TIOCMSET:
711 		SCARG(&ia, com) = TIOCMSET;
712 		break;
713 	default:
714 		return EINVAL;
715 	}
716 
717 	SCARG(&ia, fd) = SCARG(uap, fd);
718 	SCARG(&ia, data) = SCARG(uap, data);
719 	return sys_ioctl(p, &ia, retval);
720 }
721