1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 * Copyright (c) 2018, Joyent, Inc.
25 * Copyright 2018 OmniOS Community Edition (OmniOSce) Association.
26 */
27
28 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
29 /* All Rights Reserved */
30
31 /*
32 * University Copyright- Copyright (c) 1982, 1986, 1988
33 * The Regents of the University of California
34 * All Rights Reserved
35 *
36 * University Acknowledgment- Portions of this document are derived from
37 * software developed by the University of California, Berkeley, and its
38 * contributors.
39 */
40
41 /*
42 * Standard Streams Terminal Line Discipline module.
43 */
44
45 #include <sys/param.h>
46 #include <sys/types.h>
47 #include <sys/termio.h>
48 #include <sys/stream.h>
49 #include <sys/conf.h>
50 #include <sys/stropts.h>
51 #include <sys/strsubr.h>
52 #include <sys/strsun.h>
53 #include <sys/strtty.h>
54 #include <sys/signal.h>
55 #include <sys/file.h>
56 #include <sys/errno.h>
57 #include <sys/debug.h>
58 #include <sys/cmn_err.h>
59 #include <sys/euc.h>
60 #include <sys/eucioctl.h>
61 #include <sys/csiioctl.h>
62 #include <sys/ptms.h>
63 #include <sys/ldterm.h>
64 #include <sys/cred.h>
65 #include <sys/ddi.h>
66 #include <sys/sunddi.h>
67 #include <sys/kmem.h>
68 #include <sys/modctl.h>
69
70 /* Time limit when draining during a close(9E) invoked by exit(2) */
71 /* Can be set to zero to emulate the old, broken behavior */
72 int ldterm_drain_limit = 15000000;
73
74 /*
75 * Character types.
76 */
77 #define ORDINARY 0
78 #define CONTROL 1
79 #define BACKSPACE 2
80 #define NEWLINE 3
81 #define TAB 4
82 #define VTAB 5
83 #define RETURN 6
84
85 /*
86 * The following for EUC handling:
87 */
88 #define T_SS2 7
89 #define T_SS3 8
90
91 /*
92 * Table indicating character classes to tty driver. In particular,
93 * if the class is ORDINARY, then the character needs no special
94 * processing on output.
95 *
96 * Characters in the C1 set are all considered CONTROL; this will
97 * work with terminals that properly use the ANSI/ISO extensions,
98 * but might cause distress with terminals that put graphics in
99 * the range 0200-0237. On the other hand, characters in that
100 * range cause even greater distress to other UNIX terminal drivers....
101 */
102
103 static char typetab[256] = {
104 /* 000 */ CONTROL, CONTROL, CONTROL, CONTROL,
105 /* 004 */ CONTROL, CONTROL, CONTROL, CONTROL,
106 /* 010 */ BACKSPACE, TAB, NEWLINE, CONTROL,
107 /* 014 */ VTAB, RETURN, CONTROL, CONTROL,
108 /* 020 */ CONTROL, CONTROL, CONTROL, CONTROL,
109 /* 024 */ CONTROL, CONTROL, CONTROL, CONTROL,
110 /* 030 */ CONTROL, CONTROL, CONTROL, CONTROL,
111 /* 034 */ CONTROL, CONTROL, CONTROL, CONTROL,
112 /* 040 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
113 /* 044 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
114 /* 050 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
115 /* 054 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
116 /* 060 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
117 /* 064 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
118 /* 070 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
119 /* 074 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
120 /* 100 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
121 /* 104 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
122 /* 110 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
123 /* 114 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
124 /* 120 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
125 /* 124 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
126 /* 130 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
127 /* 134 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
128 /* 140 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
129 /* 144 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
130 /* 150 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
131 /* 154 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
132 /* 160 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
133 /* 164 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
134 /* 170 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
135 /* 174 */ ORDINARY, ORDINARY, ORDINARY, CONTROL,
136 /* 200 */ CONTROL, CONTROL, CONTROL, CONTROL,
137 /* 204 */ CONTROL, CONTROL, T_SS2, T_SS3,
138 /* 210 */ CONTROL, CONTROL, CONTROL, CONTROL,
139 /* 214 */ CONTROL, CONTROL, CONTROL, CONTROL,
140 /* 220 */ CONTROL, CONTROL, CONTROL, CONTROL,
141 /* 224 */ CONTROL, CONTROL, CONTROL, CONTROL,
142 /* 230 */ CONTROL, CONTROL, CONTROL, CONTROL,
143 /* 234 */ CONTROL, CONTROL, CONTROL, CONTROL,
144 /* 240 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
145 /* 244 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
146 /* 250 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
147 /* 254 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
148 /* 260 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
149 /* 264 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
150 /* 270 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
151 /* 274 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
152 /* 300 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
153 /* 304 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
154 /* 310 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
155 /* 314 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
156 /* 320 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
157 /* 324 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
158 /* 330 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
159 /* 334 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
160 /* 340 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
161 /* 344 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
162 /* 350 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
163 /* 354 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
164 /* 360 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
165 /* 364 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
166 /* 370 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
167 /*
168 * WARNING: For EUC, 0xFF must be an ordinary character. It is used with
169 * single-byte EUC in some of the "ISO Latin Alphabet" codesets, and occupies
170 * a screen position; in those ISO sets where that position isn't used, it
171 * shouldn't make any difference.
172 */
173 /* 374 */ ORDINARY, ORDINARY, ORDINARY, ORDINARY,
174 };
175
176 /*
177 * Translation table for output without OLCUC. All ORDINARY-class characters
178 * translate to themselves. All other characters have a zero in the table,
179 * which stops the copying.
180 */
181 static unsigned char notrantab[256] = {
182 /* 000 */ 0, 0, 0, 0, 0, 0, 0, 0,
183 /* 010 */ 0, 0, 0, 0, 0, 0, 0, 0,
184 /* 020 */ 0, 0, 0, 0, 0, 0, 0, 0,
185 /* 030 */ 0, 0, 0, 0, 0, 0, 0, 0,
186 /* 040 */ ' ', '!', '"', '#', '$', '%', '&', '\'',
187 /* 050 */ '(', ')', '*', '+', ',', '-', '.', '/',
188 /* 060 */ '0', '1', '2', '3', '4', '5', '6', '7',
189 /* 070 */ '8', '9', ':', ';', '<', '=', '>', '?',
190 /* 100 */ '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
191 /* 110 */ 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
192 /* 120 */ 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
193 /* 130 */ 'X', 'Y', 'Z', '[', '\\', ']', '^', '_',
194 /* 140 */ '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
195 /* 150 */ 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
196 /* 160 */ 'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
197 /* 170 */ 'x', 'y', 'z', '{', '|', '}', '~', 0,
198 /* 200 */ 0, 0, 0, 0, 0, 0, 0, 0,
199 /* 210 */ 0, 0, 0, 0, 0, 0, 0, 0,
200 /* 220 */ 0, 0, 0, 0, 0, 0, 0, 0,
201 /* 230 */ 0, 0, 0, 0, 0, 0, 0, 0,
202 /* 240 */ 0240, 0241, 0242, 0243, 0244, 0245, 0246, 0247,
203 /* 250 */ 0250, 0251, 0252, 0253, 0254, 0255, 0256, 0257,
204 /* 260 */ 0260, 0261, 0262, 0263, 0264, 0265, 0266, 0267,
205 /* 270 */ 0270, 0271, 0272, 0273, 0274, 0275, 0276, 0277,
206 /* 300 */ 0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307,
207 /* 310 */ 0310, 0311, 0312, 0313, 0314, 0315, 0316, 0317,
208 /* 320 */ 0320, 0321, 0322, 0323, 0324, 0325, 0326, 0327,
209 /* 330 */ 0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337,
210 /* 340 */ 0340, 0341, 0342, 0343, 0344, 0345, 0346, 0347,
211 /* 350 */ 0350, 0351, 0352, 0353, 0354, 0355, 0356, 0357,
212 /* 360 */ 0360, 0361, 0362, 0363, 0364, 0365, 0366, 0367,
213 /*
214 * WARNING: as for above ISO sets, \377 may be used. Translate it to
215 * itself.
216 */
217 /* 370 */ 0370, 0371, 0372, 0373, 0374, 0375, 0376, 0377,
218 };
219
220 /*
221 * Translation table for output with OLCUC. All ORDINARY-class characters
222 * translate to themselves, except for lower-case letters which translate
223 * to their upper-case equivalents. All other characters have a zero in
224 * the table, which stops the copying.
225 */
226 static unsigned char lcuctab[256] = {
227 /* 000 */ 0, 0, 0, 0, 0, 0, 0, 0,
228 /* 010 */ 0, 0, 0, 0, 0, 0, 0, 0,
229 /* 020 */ 0, 0, 0, 0, 0, 0, 0, 0,
230 /* 030 */ 0, 0, 0, 0, 0, 0, 0, 0,
231 /* 040 */ ' ', '!', '"', '#', '$', '%', '&', '\'',
232 /* 050 */ '(', ')', '*', '+', ',', '-', '.', '/',
233 /* 060 */ '0', '1', '2', '3', '4', '5', '6', '7',
234 /* 070 */ '8', '9', ':', ';', '<', '=', '>', '?',
235 /* 100 */ '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
236 /* 110 */ 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
237 /* 120 */ 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
238 /* 130 */ 'X', 'Y', 'Z', '[', '\\', ']', '^', '_',
239 /* 140 */ '`', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
240 /* 150 */ 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
241 /* 160 */ 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
242 /* 170 */ 'X', 'Y', 'Z', '{', '|', '}', '~', 0,
243 /* 200 */ 0, 0, 0, 0, 0, 0, 0, 0,
244 /* 210 */ 0, 0, 0, 0, 0, 0, 0, 0,
245 /* 220 */ 0, 0, 0, 0, 0, 0, 0, 0,
246 /* 230 */ 0, 0, 0, 0, 0, 0, 0, 0,
247 /* 240 */ 0240, 0241, 0242, 0243, 0244, 0245, 0246, 0247,
248 /* 250 */ 0250, 0251, 0252, 0253, 0254, 0255, 0256, 0257,
249 /* 260 */ 0260, 0261, 0262, 0263, 0264, 0265, 0266, 0267,
250 /* 270 */ 0270, 0271, 0272, 0273, 0274, 0275, 0276, 0277,
251 /* 300 */ 0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307,
252 /* 310 */ 0310, 0311, 0312, 0313, 0314, 0315, 0316, 0317,
253 /* 320 */ 0320, 0321, 0322, 0323, 0324, 0325, 0326, 0327,
254 /* 330 */ 0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337,
255 /* 340 */ 0340, 0341, 0342, 0343, 0344, 0345, 0346, 0347,
256 /* 350 */ 0350, 0351, 0352, 0353, 0354, 0355, 0356, 0357,
257 /* 360 */ 0360, 0361, 0362, 0363, 0364, 0365, 0366, 0367,
258 /*
259 * WARNING: as for above ISO sets, \377 may be used. Translate it to
260 * itself.
261 */
262 /* 370 */ 0370, 0371, 0372, 0373, 0374, 0375, 0376, 0377,
263 };
264
265 /*
266 * Input mapping table -- if an entry is non-zero, and XCASE is set,
267 * when the corresponding character is typed preceded by "\" the escape
268 * sequence is replaced by the table value. Mostly used for
269 * upper-case only terminals.
270 */
271 static char imaptab[256] = {
272 /* 000 */ 0, 0, 0, 0, 0, 0, 0, 0,
273 /* 010 */ 0, 0, 0, 0, 0, 0, 0, 0,
274 /* 020 */ 0, 0, 0, 0, 0, 0, 0, 0,
275 /* 030 */ 0, 0, 0, 0, 0, 0, 0, 0,
276 /* 040 */ 0, '|', 0, 0, 0, 0, 0, '`',
277 /* 050 */ '{', '}', 0, 0, 0, 0, 0, 0,
278 /* 060 */ 0, 0, 0, 0, 0, 0, 0, 0,
279 /* 070 */ 0, 0, 0, 0, 0, 0, 0, 0,
280 /* 100 */ 0, 0, 0, 0, 0, 0, 0, 0,
281 /* 110 */ 0, 0, 0, 0, 0, 0, 0, 0,
282 /* 120 */ 0, 0, 0, 0, 0, 0, 0, 0,
283 /* 130 */ 0, 0, 0, 0, '\\', 0, '~', 0,
284 /* 140 */ 0, 'A', 'B', 'C', 'D', 'E', 'F', 'G',
285 /* 150 */ 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
286 /* 160 */ 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
287 /* 170 */ 'X', 'Y', 'Z', 0, 0, 0, 0, 0,
288 /* 200-377 aren't mapped */
289 };
290
291 /*
292 * Output mapping table -- if an entry is non-zero, and XCASE is set,
293 * the corresponding character is printed as "\" followed by the table
294 * value. Mostly used for upper-case only terminals.
295 */
296 static char omaptab[256] = {
297 /* 000 */ 0, 0, 0, 0, 0, 0, 0, 0,
298 /* 010 */ 0, 0, 0, 0, 0, 0, 0, 0,
299 /* 020 */ 0, 0, 0, 0, 0, 0, 0, 0,
300 /* 030 */ 0, 0, 0, 0, 0, 0, 0, 0,
301 /* 040 */ 0, 0, 0, 0, 0, 0, 0, 0,
302 /* 050 */ 0, 0, 0, 0, 0, 0, 0, 0,
303 /* 060 */ 0, 0, 0, 0, 0, 0, 0, 0,
304 /* 070 */ 0, 0, 0, 0, 0, 0, 0, 0,
305 /* 100 */ 0, 'A', 'B', 'C', 'D', 'E', 'F', 'G',
306 /* 110 */ 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
307 /* 120 */ 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
308 /* 130 */ 'X', 'Y', 'Z', 0, 0, 0, 0, 0,
309 /* 140 */ '\'', 0, 0, 0, 0, 0, 0, 0,
310 /* 150 */ 0, 0, 0, 0, 0, 0, 0, 0,
311 /* 160 */ 0, 0, 0, 0, 0, 0, 0, 0,
312 /* 170 */ 0, 0, 0, '(', '!', ')', '^', 0,
313 /* 200-377 aren't mapped */
314 };
315
316 /*
317 * Translation table for TS_MEUC output without OLCUC. All printing ASCII
318 * characters translate to themselves. All other _bytes_ have a zero in
319 * the table, which stops the copying. This and the following table exist
320 * only so we can use the existing movtuc processing with or without OLCUC.
321 * Maybe it speeds up something...because we can copy a block of characters
322 * by only looking for zeros in the table.
323 *
324 * If we took the simple expedient of DISALLOWING "olcuc" with multi-byte
325 * processing, we could rid ourselves of both these tables and save 512 bytes;
326 * seriously, it doesn't make much sense to use olcuc with multi-byte, and
327 * it will probably never be used. Consideration should be given to disallowing
328 * the combination TS_MEUC & OLCUC.
329 */
330 static unsigned char enotrantab[256] = {
331 /* 000 */ 0, 0, 0, 0, 0, 0, 0, 0,
332 /* 010 */ 0, 0, 0, 0, 0, 0, 0, 0,
333 /* 020 */ 0, 0, 0, 0, 0, 0, 0, 0,
334 /* 030 */ 0, 0, 0, 0, 0, 0, 0, 0,
335 /* 040 */ ' ', '!', '"', '#', '$', '%', '&', '\'',
336 /* 050 */ '(', ')', '*', '+', ',', '-', '.', '/',
337 /* 060 */ '0', '1', '2', '3', '4', '5', '6', '7',
338 /* 070 */ '8', '9', ':', ';', '<', '=', '>', '?',
339 /* 100 */ '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
340 /* 110 */ 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
341 /* 120 */ 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
342 /* 130 */ 'X', 'Y', 'Z', '[', '\\', ']', '^', '_',
343 /* 140 */ '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
344 /* 150 */ 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
345 /* 160 */ 'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
346 /* 170 */ 'x', 'y', 'z', '{', '|', '}', '~', 0,
347 /* 200 - 377 aren't mapped (they're stoppers). */
348 };
349
350 /*
351 * Translation table for TS_MEUC output with OLCUC. All printing ASCII
352 * translate to themselves, except for lower-case letters which translate
353 * to their upper-case equivalents. All other bytes have a zero in
354 * the table, which stops the copying. Useless for ISO Latin Alphabet
355 * translations, but *sigh* OLCUC is really only defined for ASCII anyway.
356 * We only have this table so we can use the existing OLCUC processing with
357 * TS_MEUC set (multi-byte mode). Nobody would ever think of actually
358 * _using_ it...would they?
359 */
360 static unsigned char elcuctab[256] = {
361 /* 000 */ 0, 0, 0, 0, 0, 0, 0, 0,
362 /* 010 */ 0, 0, 0, 0, 0, 0, 0, 0,
363 /* 020 */ 0, 0, 0, 0, 0, 0, 0, 0,
364 /* 030 */ 0, 0, 0, 0, 0, 0, 0, 0,
365 /* 040 */ ' ', '!', '"', '#', '$', '%', '&', '\'',
366 /* 050 */ '(', ')', '*', '+', ',', '-', '.', '/',
367 /* 060 */ '0', '1', '2', '3', '4', '5', '6', '7',
368 /* 070 */ '8', '9', ':', ';', '<', '=', '>', '?',
369 /* 100 */ '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
370 /* 110 */ 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
371 /* 120 */ 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
372 /* 130 */ 'X', 'Y', 'Z', '[', '\\', ']', '^', '_',
373 /* 140 */ '`', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
374 /* 150 */ 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
375 /* 160 */ 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
376 /* 170 */ 'X', 'Y', 'Z', '{', '|', '}', '~', 0,
377 /* 200 - 377 aren't mapped (they're stoppers). */
378 };
379
380 static struct streamtab ldtrinfo;
381
382 static struct fmodsw fsw = {
383 "ldterm",
384 &ldtrinfo,
385 D_MTQPAIR | D_MP | _D_SINGLE_INSTANCE
386 };
387
388 static struct modlstrmod modlstrmod = {
389 &mod_strmodops, "terminal line discipline", &fsw
390 };
391
392
393 static struct modlinkage modlinkage = {
394 MODREV_1, &modlstrmod, NULL
395 };
396
397
398 int
399 _init(void)
400 {
401 return (mod_install(&modlinkage));
402 }
403
404 int
405 _fini(void)
406 {
407 return (mod_remove(&modlinkage));
408 }
409
410 int
411 _info(struct modinfo *modinfop)
412 {
413 return (mod_info(&modlinkage, modinfop));
414 }
415
416
417 static int ldtermopen(queue_t *, dev_t *, int, int, cred_t *);
418 static int ldtermclose(queue_t *, int, cred_t *);
419 static int ldtermrput(queue_t *, mblk_t *);
420 static int ldtermrsrv(queue_t *);
421 static int ldtermrmsg(queue_t *, mblk_t *);
422 static int ldtermwput(queue_t *, mblk_t *);
423 static int ldtermwsrv(queue_t *);
424 static int ldtermwmsg(queue_t *, mblk_t *);
425 static mblk_t *ldterm_docanon(unsigned char, mblk_t *, size_t, queue_t *,
426 ldtermstd_state_t *, int *);
427 static int ldterm_unget(ldtermstd_state_t *);
428 static void ldterm_trim(ldtermstd_state_t *);
429 static void ldterm_rubout(unsigned char, queue_t *, size_t,
430 ldtermstd_state_t *);
431 static int ldterm_tabcols(ldtermstd_state_t *);
432 static void ldterm_erase(queue_t *, size_t, ldtermstd_state_t *);
433 static void ldterm_werase(queue_t *, size_t, ldtermstd_state_t *);
434 static void ldterm_kill(queue_t *, size_t, ldtermstd_state_t *);
435 static void ldterm_reprint(queue_t *, size_t, ldtermstd_state_t *);
436 static mblk_t *ldterm_dononcanon(mblk_t *, mblk_t *, size_t, queue_t *,
437 ldtermstd_state_t *);
438 static int ldterm_echo(unsigned char, queue_t *, size_t,
439 ldtermstd_state_t *);
440 static void ldterm_outchar(unsigned char, queue_t *, size_t,
441 ldtermstd_state_t *);
442 static void ldterm_outstring(unsigned char *, int, queue_t *, size_t,
443 ldtermstd_state_t *tp);
444 static mblk_t *newmsg(ldtermstd_state_t *);
445 static void ldterm_msg_upstream(queue_t *, ldtermstd_state_t *);
446 static void ldterm_wenable(void *);
447 static mblk_t *ldterm_output_msg(queue_t *, mblk_t *, mblk_t **,
448 ldtermstd_state_t *, size_t, int);
449 static void ldterm_flush_output(unsigned char, queue_t *,
450 ldtermstd_state_t *);
451 static void ldterm_dosig(queue_t *, int, unsigned char, int, int);
452 static void ldterm_do_ioctl(queue_t *, mblk_t *);
453 static int chgstropts(struct termios *, ldtermstd_state_t *, queue_t *);
454 static void ldterm_ioctl_reply(queue_t *, mblk_t *);
455 static void vmin_satisfied(queue_t *, ldtermstd_state_t *, int);
456 static void vmin_settimer(queue_t *);
457 static void vmin_timed_out(void *);
458 static void ldterm_adjust_modes(ldtermstd_state_t *);
459 static void ldterm_eucwarn(ldtermstd_state_t *);
460 static void cp_eucwioc(eucioc_t *, eucioc_t *, int);
461 static int ldterm_codeset(uchar_t, uchar_t);
462
463 static void ldterm_csi_erase(queue_t *, size_t, ldtermstd_state_t *);
464 static void ldterm_csi_werase(queue_t *, size_t, ldtermstd_state_t *);
465
466 static uchar_t ldterm_utf8_width(uchar_t *, int);
467
468 /* Codeset type specific methods for EUC, PCCS, and, UTF-8 codeset types. */
469 static int __ldterm_dispwidth_euc(uchar_t, void *, int);
470 static int __ldterm_memwidth_euc(uchar_t, void *);
471
472 static int __ldterm_dispwidth_pccs(uchar_t, void *, int);
473 static int __ldterm_memwidth_pccs(uchar_t, void *);
474
475 static int __ldterm_dispwidth_utf8(uchar_t, void *, int);
476 static int __ldterm_memwidth_utf8(uchar_t, void *);
477
478 static const ldterm_cs_methods_t cs_methods[LDTERM_CS_TYPE_MAX + 1] = {
479 {
480 NULL,
481 NULL
482 },
483 {
484 __ldterm_dispwidth_euc,
485 __ldterm_memwidth_euc
486 },
487 {
488 __ldterm_dispwidth_pccs,
489 __ldterm_memwidth_pccs
490 },
491 {
492 __ldterm_dispwidth_utf8,
493 __ldterm_memwidth_utf8
494 }
495 };
496
497 /*
498 * The default codeset is presumably C locale's ISO 646 in EUC but
499 * the data structure at below defined as the default codeset data also
500 * support any single byte (EUC) locales.
501 */
502 static const ldterm_cs_data_t default_cs_data = {
503 LDTERM_DATA_VERSION,
504 LDTERM_CS_TYPE_EUC,
505 (uchar_t)0,
506 (uchar_t)0,
507 (char *)NULL,
508 {
509 '\0', '\0', '\0', '\0',
510 '\0', '\0', '\0', '\0',
511 '\0', '\0', '\0', '\0',
512 '\0', '\0', '\0', '\0',
513 '\0', '\0', '\0', '\0',
514 '\0', '\0', '\0', '\0',
515 '\0', '\0', '\0', '\0',
516 '\0', '\0', '\0', '\0',
517 '\0', '\0', '\0', '\0',
518 '\0', '\0', '\0', '\0'
519 }
520 };
521
522 /*
523 * The following tables are from either u8_textprep.c or uconv.c at
524 * usr/src/common/unicode/. The tables are used to figure out corresponding
525 * UTF-8 character byte lengths and also the validity of given character bytes.
526 */
527 extern const int8_t u8_number_of_bytes[];
528 extern const uchar_t u8_masks_tbl[];
529 extern const uint8_t u8_valid_min_2nd_byte[];
530 extern const uint8_t u8_valid_max_2nd_byte[];
531
532 /*
533 * Unicode character width definition tables from uwidth.c:
534 */
535 extern const ldterm_unicode_data_cell_t ldterm_ucode[][16384];
536
537 #ifdef LDDEBUG
538 int ldterm_debug = 0;
539 #define DEBUG1(a) if (ldterm_debug == 1) printf a
540 #define DEBUG2(a) if (ldterm_debug >= 2) printf a /* allocations */
541 #define DEBUG3(a) if (ldterm_debug >= 3) printf a /* M_CTL Stuff */
542 #define DEBUG4(a) if (ldterm_debug >= 4) printf a /* M_READ Stuff */
543 #define DEBUG5(a) if (ldterm_debug >= 5) printf a
544 #define DEBUG6(a) if (ldterm_debug >= 6) printf a
545 #define DEBUG7(a) if (ldterm_debug >= 7) printf a
546 #else
547 #define DEBUG1(a)
548 #define DEBUG2(a)
549 #define DEBUG3(a)
550 #define DEBUG4(a)
551 #define DEBUG5(a)
552 #define DEBUG6(a)
553 #define DEBUG7(a)
554 #endif /* LDDEBUG */
555
556
557 /*
558 * Since most of the buffering occurs either at the stream head or in
559 * the "message currently being assembled" buffer, we have a
560 * relatively small input queue, so that blockages above us get
561 * reflected fairly quickly to the module below us. We also have a
562 * small maximum packet size, since you can put a message of that
563 * size on an empty queue no matter how much bigger than the high
564 * water mark it is.
565 */
566 static struct module_info ldtermmiinfo = {
567 0x0bad,
568 "ldterm",
569 0,
570 _TTY_BUFSIZ,
571 _TTY_BUFSIZ,
572 LOWAT
573 };
574
575
576 static struct qinit ldtermrinit = {
577 ldtermrput,
578 ldtermrsrv,
579 ldtermopen,
580 ldtermclose,
581 NULL,
582 &ldtermmiinfo
583 };
584
585
586 static struct module_info ldtermmoinfo = {
587 0x0bad,
588 "ldterm",
589 0,
590 INFPSZ,
591 1,
592 0
593 };
594
595
596 static struct qinit ldtermwinit = {
597 ldtermwput,
598 ldtermwsrv,
599 ldtermopen,
600 ldtermclose,
601 NULL,
602 &ldtermmoinfo
603 };
604
605
606 static struct streamtab ldtrinfo = {
607 &ldtermrinit,
608 &ldtermwinit,
609 NULL,
610 NULL
611 };
612
613 /*
614 * Dummy qbufcall callback routine used by open and close.
615 * The framework will wake up qwait_sig when we return from
616 * this routine (as part of leaving the perimeters.)
617 * (The framework enters the perimeters before calling the qbufcall() callback
618 * and leaves the perimeters after the callback routine has executed. The
619 * framework performs an implicit wakeup of any thread in qwait/qwait_sig
620 * when it leaves the perimeter. See qwait(9E).)
621 */
622 /* ARGSUSED */
623 static void
624 dummy_callback(void *arg)
625 {}
626
627
628 static mblk_t *
629 open_ioctl(queue_t *q, uint_t cmd)
630 {
631 mblk_t *mp;
632 bufcall_id_t id;
633 int retv;
634
635 while ((mp = mkiocb(cmd)) == NULL) {
636 id = qbufcall(q, sizeof (struct iocblk), BPRI_MED,
637 dummy_callback, NULL);
638 retv = qwait_sig(q);
639 qunbufcall(q, id);
640 if (retv == 0)
641 break;
642 }
643 return (mp);
644 }
645
646 static mblk_t *
647 open_mblk(queue_t *q, size_t len)
648 {
649 mblk_t *mp;
650 bufcall_id_t id;
651 int retv;
652
653 while ((mp = allocb(len, BPRI_MED)) == NULL) {
654 id = qbufcall(q, len, BPRI_MED, dummy_callback, NULL);
655 retv = qwait_sig(q);
656 qunbufcall(q, id);
657 if (retv == 0)
658 break;
659 }
660 return (mp);
661 }
662
663 /*
664 * Line discipline open.
665 */
666 /* ARGSUSED1 */
667 static int
668 ldtermopen(queue_t *q, dev_t *devp, int oflag, int sflag, cred_t *crp)
669 {
670 ldtermstd_state_t *tp;
671 mblk_t *bp, *qryp;
672 int len;
673 struct stroptions *strop;
674 struct termios *termiosp;
675 queue_t *wq;
676
677 if (q->q_ptr != NULL) {
678 return (0); /* already attached */
679 }
680
681 tp = (ldtermstd_state_t *)kmem_zalloc(sizeof (ldtermstd_state_t),
682 KM_SLEEP);
683
684 /*
685 * Get termios defaults. These are stored as
686 * a property in the "options" node.
687 */
688 if (ddi_getlongprop(DDI_DEV_T_ANY, ddi_root_node(), DDI_PROP_NOTPROM,
689 "ttymodes", (caddr_t)&termiosp, &len) == DDI_PROP_SUCCESS &&
690 len == sizeof (struct termios)) {
691 tp->t_modes = *termiosp;
692 tp->t_amodes = *termiosp;
693 kmem_free(termiosp, len);
694 } else {
695 /*
696 * Gack! Whine about it.
697 */
698 cmn_err(CE_WARN, "ldterm: Couldn't get ttymodes property!");
699 }
700 bzero(&tp->t_dmodes, sizeof (struct termios));
701
702 tp->t_state = 0;
703
704 tp->t_line = 0;
705 tp->t_col = 0;
706
707 tp->t_rocount = 0;
708 tp->t_rocol = 0;
709
710 tp->t_message = NULL;
711 tp->t_endmsg = NULL;
712 tp->t_msglen = 0;
713 tp->t_rd_request = 0;
714
715 tp->t_echomp = NULL;
716 tp->t_iocid = 0;
717 tp->t_wbufcid = 0;
718 tp->t_vtid = 0;
719
720 q->q_ptr = (caddr_t)tp;
721 WR(q)->q_ptr = (caddr_t)tp;
722 /*
723 * The following for EUC and also non-EUC codesets:
724 */
725 tp->t_codeset = tp->t_eucleft = tp->t_eucign = tp->t_scratch_len = 0;
726 bzero(&tp->eucwioc, EUCSIZE);
727 tp->eucwioc.eucw[0] = 1; /* ASCII mem & screen width */
728 tp->eucwioc.scrw[0] = 1;
729 tp->t_maxeuc = 1; /* the max len in bytes of an EUC char */
730 tp->t_eucp = NULL;
731 tp->t_csmethods = cs_methods[LDTERM_CS_TYPE_EUC];
732 tp->t_csdata = default_cs_data;
733
734 /*
735 * Try to switch to UTF-8 mode by allocating buffer for multibyte
736 * chars, keep EUC if allocation fails.
737 */
738 if ((tp->t_eucp_mp = allocb(_TTY_BUFSIZ, BPRI_HI)) != NULL) {
739 tp->t_eucp = tp->t_eucp_mp->b_rptr;
740 tp->t_state = TS_MEUC; /* Multibyte mode. */
741 tp->t_maxeuc = 4; /* the max len in bytes of an UTF-8 char */
742 tp->t_csdata.codeset_type = LDTERM_CS_TYPE_UTF8;
743 tp->t_csdata.csinfo_num = 4;
744 /* locale_name needs string length with terminating NUL */
745 tp->t_csdata.locale_name = (char *)kmem_alloc(6, KM_SLEEP);
746 (void) strcpy(tp->t_csdata.locale_name, "UTF-8");
747 tp->t_csmethods = cs_methods[LDTERM_CS_TYPE_UTF8];
748 }
749 tp->t_eucwarn = 0; /* no bad chars seen yet */
750
751 qprocson(q);
752
753 /*
754 * Find out if the module below us does canonicalization; if
755 * so, we won't do it ourselves.
756 */
757
758 if ((qryp = open_ioctl(q, MC_CANONQUERY)) == NULL)
759 goto open_abort;
760
761 /*
762 * Reformulate as an M_CTL message. The actual data will
763 * be in the b_cont field.
764 */
765 qryp->b_datap->db_type = M_CTL;
766 wq = OTHERQ(q);
767 putnext(wq, qryp);
768
769 /* allocate a TCSBRK ioctl in case we'll need it on close */
770 if ((qryp = open_ioctl(q, TCSBRK)) == NULL)
771 goto open_abort;
772 tp->t_drainmsg = qryp;
773 if ((bp = open_mblk(q, sizeof (int))) == NULL)
774 goto open_abort;
775 qryp->b_cont = bp;
776
777 /*
778 * Find out if the underlying driver supports proper POSIX close
779 * semantics. If not, we'll have to approximate it using TCSBRK. If
780 * it does, it will respond with MC_HAS_POSIX, and we'll catch that in
781 * the ldtermrput routine.
782 *
783 * When the ldterm_drain_limit tunable is set to zero, we behave the
784 * same as old ldterm: don't send this new message, and always use
785 * TCSBRK during close.
786 */
787 if (ldterm_drain_limit != 0) {
788 if ((qryp = open_ioctl(q, MC_POSIXQUERY)) == NULL)
789 goto open_abort;
790 qryp->b_datap->db_type = M_CTL;
791 putnext(wq, qryp);
792 }
793
794 /* prepare to clear the water marks on close */
795 if ((bp = open_mblk(q, sizeof (struct stroptions))) == NULL)
796 goto open_abort;
797 tp->t_closeopts = bp;
798
799 /*
800 * Set the high-water and low-water marks on the stream head
801 * to values appropriate for a terminal. Also set the "vmin"
802 * and "vtime" values to 1 and 0, turn on message-nondiscard
803 * mode (as we're in ICANON mode), and turn on "old-style
804 * NODELAY" mode.
805 */
806 if ((bp = open_mblk(q, sizeof (struct stroptions))) == NULL)
807 goto open_abort;
808 strop = (struct stroptions *)bp->b_wptr;
809 strop->so_flags = SO_READOPT|SO_HIWAT|SO_LOWAT|SO_NDELON|SO_ISTTY;
810 strop->so_readopt = RMSGN;
811 strop->so_hiwat = _TTY_BUFSIZ;
812 strop->so_lowat = LOWAT;
813 bp->b_wptr += sizeof (struct stroptions);
814 bp->b_datap->db_type = M_SETOPTS;
815 putnext(q, bp);
816
817 return (0); /* this can become a controlling TTY */
818
819 open_abort:
820 qprocsoff(q);
821 q->q_ptr = NULL;
822 WR(q)->q_ptr = NULL;
823 freemsg(tp->t_closeopts);
824 freemsg(tp->t_drainmsg);
825 /* Dump the state structure */
826 kmem_free(tp, sizeof (ldtermstd_state_t));
827 return (EINTR);
828 }
829
830 struct close_timer {
831 timeout_id_t id;
832 ldtermstd_state_t *tp;
833 };
834
835 static void
836 drain_timed_out(void *arg)
837 {
838 struct close_timer *ctp = arg;
839
840 ctp->id = 0;
841 ctp->tp->t_state &= ~TS_IOCWAIT;
842 }
843
844 /* ARGSUSED2 */
845 static int
846 ldtermclose(queue_t *q, int cflag, cred_t *crp)
847 {
848 ldtermstd_state_t *tp = (ldtermstd_state_t *)q->q_ptr;
849 struct stroptions *strop;
850 mblk_t *bp;
851 struct close_timer cltimer;
852
853 /*
854 * If we have an outstanding vmin timeout, cancel it.
855 */
856 tp->t_state |= TS_CLOSE;
857 if (tp->t_vtid != 0)
858 (void) quntimeout(q, tp->t_vtid);
859 tp->t_vtid = 0;
860
861 /*
862 * Cancel outstanding qbufcall request.
863 */
864 if (tp->t_wbufcid != 0)
865 qunbufcall(q, tp->t_wbufcid);
866
867 /*
868 * Reset the high-water and low-water marks on the stream
869 * head (?), turn on byte-stream mode, and turn off
870 * "old-style NODELAY" mode.
871 */
872 bp = tp->t_closeopts;
873 strop = (struct stroptions *)bp->b_wptr;
874 strop->so_flags = SO_READOPT|SO_NDELOFF;
875 strop->so_readopt = RNORM;
876 bp->b_wptr += sizeof (struct stroptions);
877 bp->b_datap->db_type = M_SETOPTS;
878 putnext(q, bp);
879
880 if (cflag & (FNDELAY|FNONBLOCK)) {
881 freemsg(tp->t_drainmsg);
882 } else if ((bp = tp->t_drainmsg) != NULL) {
883 struct iocblk *iocb;
884
885 /*
886 * If the driver isn't known to have POSIX close semantics,
887 * then we have to emulate this the old way. This is done by
888 * sending down TCSBRK,1 to drain the output and waiting for
889 * the reply.
890 */
891 iocb = (struct iocblk *)bp->b_rptr;
892 iocb->ioc_count = sizeof (int);
893 *(int *)bp->b_cont->b_rptr = 1;
894 bp->b_cont->b_wptr += sizeof (int);
895 tp->t_state |= TS_IOCWAIT;
896 tp->t_iocid = iocb->ioc_id;
897 if (!putq(WR(q), bp))
898 putnext(WR(q), bp);
899
900 /*
901 * If we're not able to receive signals at this point, then
902 * launch a timer. This timer will prevent us from waiting
903 * forever for a signal that won't arrive.
904 */
905 cltimer.id = 0;
906 if (!ddi_can_receive_sig() && ldterm_drain_limit != 0) {
907 cltimer.tp = tp;
908 cltimer.id = qtimeout(q, drain_timed_out, &cltimer,
909 drv_usectohz(ldterm_drain_limit));
910 }
911
912 /*
913 * Note that the read side of ldterm and the qtimeout are
914 * protected by D_MTQPAIR, so no additional locking is needed
915 * here.
916 */
917 while (tp->t_state & TS_IOCWAIT) {
918 if (qwait_sig(q) == 0)
919 break;
920 }
921 if (cltimer.id != 0)
922 (void) quntimeout(q, cltimer.id);
923 }
924
925 /*
926 * From here to the end, the routine does not sleep and does not
927 * reference STREAMS, so it's guaranteed to run to completion.
928 */
929
930 qprocsoff(q);
931
932 freemsg(tp->t_message);
933 freemsg(tp->t_eucp_mp);
934
935 /* Dump the state structure, then unlink it */
936 if (tp->t_csdata.locale_name != NULL)
937 kmem_free(tp->t_csdata.locale_name,
938 strlen(tp->t_csdata.locale_name) + 1);
939 kmem_free(tp, sizeof (ldtermstd_state_t));
940 q->q_ptr = NULL;
941 return (0);
942 }
943
944
945 /*
946 * Put procedure for input from driver end of stream (read queue).
947 */
948 static int
949 ldtermrput(queue_t *q, mblk_t *mp)
950 {
951 ldtermstd_state_t *tp;
952 unsigned char c;
953 queue_t *wrq = WR(q); /* write queue of ldterm mod */
954 queue_t *nextq = q->q_next; /* queue below us */
955 mblk_t *bp;
956 struct iocblk *qryp;
957 unsigned char *readp;
958 unsigned char *writep;
959 struct termios *emodes; /* effective modes set by driver */
960 int dbtype;
961
962 tp = (ldtermstd_state_t *)q->q_ptr;
963 /*
964 * We received our ack from the driver saying there is nothing left to
965 * shovel out, so wake up the close routine.
966 */
967 dbtype = DB_TYPE(mp);
968 if ((dbtype == M_IOCACK || dbtype == M_IOCNAK) &&
969 (tp->t_state & (TS_CLOSE|TS_IOCWAIT)) == (TS_CLOSE|TS_IOCWAIT)) {
970 struct iocblk *iocp = (struct iocblk *)mp->b_rptr;
971
972 if (iocp->ioc_id == tp->t_iocid) {
973 tp->t_state &= ~TS_IOCWAIT;
974 freemsg(mp);
975 return (0);
976 }
977 }
978
979 switch (dbtype) {
980
981 default:
982 (void) putq(q, mp);
983 return (0);
984
985 /*
986 * Send these up unmolested
987 *
988 */
989 case M_PCSIG:
990 case M_SIG:
991 case M_IOCNAK:
992
993 putnext(q, mp);
994 return (0);
995
996 case M_IOCACK:
997
998 ldterm_ioctl_reply(q, mp);
999 return (0);
1000
1001 case M_BREAK:
1002
1003 /*
1004 * Parity errors are sent up as M_BREAKS with single
1005 * character data (formerly handled in the driver)
1006 */
1007 if (mp->b_wptr - mp->b_rptr == 1) {
1008 /*
1009 * IGNPAR PARMRK RESULT
1010 * off off 0
1011 * off on 3 byte sequence
1012 * on either ignored
1013 */
1014 if (!(tp->t_amodes.c_iflag & IGNPAR)) {
1015 mp->b_wptr = mp->b_rptr;
1016 if (tp->t_amodes.c_iflag & PARMRK) {
1017 unsigned char c;
1018
1019 c = *mp->b_rptr;
1020 freemsg(mp);
1021 if ((mp = allocb(3, BPRI_HI)) == NULL) {
1022 cmn_err(CE_WARN,
1023 "ldtermrput: no blocks");
1024 return (0);
1025 }
1026 mp->b_datap->db_type = M_DATA;
1027 *mp->b_wptr++ = (uchar_t)'\377';
1028 *mp->b_wptr++ = '\0';
1029 *mp->b_wptr++ = c;
1030 putnext(q, mp);
1031 } else {
1032 mp->b_datap->db_type = M_DATA;
1033 *mp->b_wptr++ = '\0';
1034 putnext(q, mp);
1035 }
1036 } else {
1037 freemsg(mp);
1038 }
1039 return (0);
1040 }
1041 /*
1042 * We look at the apparent modes here instead of the
1043 * effective modes. Effective modes cannot be used if
1044 * IGNBRK, BRINT and PARMRK have been negotiated to
1045 * be handled by the driver. Since M_BREAK should be
1046 * sent upstream only if break processing was not
1047 * already done, it should be ok to use the apparent
1048 * modes.
1049 */
1050
1051 if (!(tp->t_amodes.c_iflag & IGNBRK)) {
1052 if (tp->t_amodes.c_iflag & BRKINT) {
1053 ldterm_dosig(q, SIGINT, '\0', M_PCSIG, FLUSHRW);
1054 freemsg(mp);
1055 } else if (tp->t_amodes.c_iflag & PARMRK) {
1056 /*
1057 * Send '\377','\0', '\0'.
1058 */
1059 freemsg(mp);
1060 if ((mp = allocb(3, BPRI_HI)) == NULL) {
1061 cmn_err(CE_WARN,
1062 "ldtermrput: no blocks");
1063 return (0);
1064 }
1065 mp->b_datap->db_type = M_DATA;
1066 *mp->b_wptr++ = (uchar_t)'\377';
1067 *mp->b_wptr++ = '\0';
1068 *mp->b_wptr++ = '\0';
1069 putnext(q, mp);
1070 } else {
1071 /*
1072 * Act as if a '\0' came in.
1073 */
1074 freemsg(mp);
1075 if ((mp = allocb(1, BPRI_HI)) == NULL) {
1076 cmn_err(CE_WARN,
1077 "ldtermrput: no blocks");
1078 return (0);
1079 }
1080 mp->b_datap->db_type = M_DATA;
1081 *mp->b_wptr++ = '\0';
1082 putnext(q, mp);
1083 }
1084 } else {
1085 freemsg(mp);
1086 }
1087 return (0);
1088
1089 case M_CTL:
1090 DEBUG3(("ldtermrput: M_CTL received\n"));
1091 /*
1092 * The M_CTL has been standardized to look like an
1093 * M_IOCTL message.
1094 */
1095
1096 if ((mp->b_wptr - mp->b_rptr) != sizeof (struct iocblk)) {
1097 DEBUG3((
1098 "Non standard M_CTL received by ldterm module\n"));
1099 /* May be for someone else; pass it on */
1100 putnext(q, mp);
1101 return (0);
1102 }
1103 qryp = (struct iocblk *)mp->b_rptr;
1104
1105 switch (qryp->ioc_cmd) {
1106
1107 case MC_PART_CANON:
1108
1109 DEBUG3(("ldtermrput: M_CTL Query Reply\n"));
1110 if (!mp->b_cont) {
1111 DEBUG3(("No information in Query Message\n"));
1112 break;
1113 }
1114 if ((mp->b_cont->b_wptr - mp->b_cont->b_rptr) ==
1115 sizeof (struct termios)) {
1116 DEBUG3(("ldtermrput: M_CTL GrandScheme\n"));
1117 /* elaborate turning off scheme */
1118 emodes = (struct termios *)mp->b_cont->b_rptr;
1119 bcopy(emodes, &tp->t_dmodes,
1120 sizeof (struct termios));
1121 ldterm_adjust_modes(tp);
1122 break;
1123 } else {
1124 DEBUG3(("Incorrect query replysize\n"));
1125 break;
1126 }
1127
1128 case MC_NO_CANON:
1129 tp->t_state |= TS_NOCANON;
1130 /*
1131 * Note: this is very nasty. It's not clear
1132 * what the right thing to do with a partial
1133 * message is; We throw it out
1134 */
1135 if (tp->t_message != NULL) {
1136 freemsg(tp->t_message);
1137 tp->t_message = NULL;
1138 tp->t_endmsg = NULL;
1139 tp->t_msglen = 0;
1140 tp->t_rocount = 0;
1141 tp->t_rocol = 0;
1142 if (tp->t_state & TS_MEUC) {
1143 ASSERT(tp->t_eucp_mp);
1144 tp->t_eucp = tp->t_eucp_mp->b_rptr;
1145 tp->t_codeset = 0;
1146 tp->t_eucleft = 0;
1147 }
1148 }
1149 break;
1150
1151 case MC_DO_CANON:
1152 tp->t_state &= ~TS_NOCANON;
1153 break;
1154
1155 case MC_HAS_POSIX:
1156 /* no longer any reason to drain from ldterm */
1157 if (ldterm_drain_limit != 0) {
1158 freemsg(tp->t_drainmsg);
1159 tp->t_drainmsg = NULL;
1160 }
1161 break;
1162
1163 default:
1164 DEBUG3(("Unknown M_CTL Message\n"));
1165 break;
1166 }
1167 putnext(q, mp); /* In case anyone else has to see it */
1168 return (0);
1169
1170 case M_FLUSH:
1171 /*
1172 * Flush everything we haven't looked at yet.
1173 */
1174
1175 if ((tp->t_state & TS_ISPTSTTY) && (*mp->b_rptr & FLUSHBAND))
1176 flushband(q, *(mp->b_rptr + 1), FLUSHDATA);
1177 else
1178 flushq(q, FLUSHDATA);
1179
1180 /*
1181 * Flush everything we have looked at.
1182 */
1183 freemsg(tp->t_message);
1184 tp->t_message = NULL;
1185 tp->t_endmsg = NULL;
1186 tp->t_msglen = 0;
1187 tp->t_rocount = 0;
1188 tp->t_rocol = 0;
1189 if (tp->t_state & TS_MEUC) { /* EUC multi-byte */
1190 ASSERT(tp->t_eucp_mp);
1191 tp->t_eucp = tp->t_eucp_mp->b_rptr;
1192 }
1193 putnext(q, mp); /* pass it on */
1194
1195 /*
1196 * Relieve input flow control
1197 */
1198 if ((tp->t_modes.c_iflag & IXOFF) &&
1199 (tp->t_state & TS_TBLOCK) &&
1200 !(tp->t_state & TS_IFBLOCK) && q->q_count <= TTXOLO) {
1201 tp->t_state &= ~TS_TBLOCK;
1202 (void) putnextctl(wrq, M_STARTI);
1203 DEBUG1(("M_STARTI down\n"));
1204 }
1205 return (0);
1206
1207 case M_DATA:
1208 break;
1209 }
1210 (void) drv_setparm(SYSRAWC, msgdsize(mp));
1211
1212 /*
1213 * Flow control: send "start input" message if blocked and
1214 * our queue is below its low water mark.
1215 */
1216 if ((tp->t_modes.c_iflag & IXOFF) && (tp->t_state & TS_TBLOCK) &&
1217 !(tp->t_state & TS_IFBLOCK) && q->q_count <= TTXOLO) {
1218 tp->t_state &= ~TS_TBLOCK;
1219 (void) putnextctl(wrq, M_STARTI);
1220 DEBUG1(("M_STARTI down\n"));
1221 }
1222 /*
1223 * If somebody below us ("intelligent" communications
1224 * board, pseudo-tty controlled by an editor) is doing
1225 * canonicalization, don't scan it for special characters.
1226 */
1227 if (tp->t_state & TS_NOCANON) {
1228 (void) putq(q, mp);
1229 return (0);
1230 }
1231 bp = mp;
1232
1233 do {
1234 readp = bp->b_rptr;
1235 writep = readp;
1236 if (tp->t_modes.c_iflag & (INLCR|IGNCR|ICRNL|IUCLC|IXON) ||
1237 tp->t_modes.c_lflag & (ISIG|ICANON)) {
1238 /*
1239 * We're doing some sort of non-trivial
1240 * processing of input; look at every
1241 * character.
1242 */
1243 while (readp < bp->b_wptr) {
1244 c = *readp++;
1245
1246 if (tp->t_modes.c_iflag & ISTRIP)
1247 c &= 0177;
1248
1249 /*
1250 * First, check that this hasn't been
1251 * escaped with the "literal next"
1252 * character.
1253 */
1254 if (tp->t_state & TS_PLNCH) {
1255 tp->t_state &= ~TS_PLNCH;
1256 tp->t_modes.c_lflag &= ~FLUSHO;
1257 *writep++ = c;
1258 continue;
1259 }
1260 /*
1261 * Setting a special character to NUL
1262 * disables it, so if this character
1263 * is NUL, it should not be compared
1264 * with any of the special characters.
1265 * It should, however, restart frozen
1266 * output if IXON and IXANY are set.
1267 */
1268 if (c == _POSIX_VDISABLE) {
1269 if (tp->t_modes.c_iflag & IXON &&
1270 tp->t_state & TS_TTSTOP &&
1271 tp->t_modes.c_lflag & IEXTEN &&
1272 tp->t_modes.c_iflag & IXANY) {
1273 tp->t_state &=
1274 ~(TS_TTSTOP|TS_OFBLOCK);
1275 (void) putnextctl(wrq, M_START);
1276 }
1277 tp->t_modes.c_lflag &= ~FLUSHO;
1278 *writep++ = c;
1279 continue;
1280 }
1281 /*
1282 * If stopped, start if you can; if
1283 * running, stop if you must.
1284 */
1285 if (tp->t_modes.c_iflag & IXON) {
1286 if (tp->t_state & TS_TTSTOP) {
1287 if (c ==
1288 tp->t_modes.c_cc[VSTART] ||
1289 (tp->t_modes.c_lflag &
1290 IEXTEN &&
1291 tp->t_modes.c_iflag &
1292 IXANY)) {
1293 tp->t_state &=
1294 ~(TS_TTSTOP |
1295 TS_OFBLOCK);
1296 (void) putnextctl(wrq,
1297 M_START);
1298 }
1299 } else {
1300 if (c ==
1301 tp->t_modes.c_cc[VSTOP]) {
1302 tp->t_state |=
1303 TS_TTSTOP;
1304 (void) putnextctl(wrq,
1305 M_STOP);
1306 }
1307 }
1308 if (c == tp->t_modes.c_cc[VSTOP] ||
1309 c == tp->t_modes.c_cc[VSTART])
1310 continue;
1311 }
1312 /*
1313 * Check for "literal next" character
1314 * and "flush output" character.
1315 * Note that we omit checks for ISIG
1316 * and ICANON, since the IEXTEN
1317 * setting subsumes them.
1318 */
1319 if (tp->t_modes.c_lflag & IEXTEN) {
1320 if (c == tp->t_modes.c_cc[VLNEXT]) {
1321 /*
1322 * Remember that we saw a
1323 * "literal next" while
1324 * scanning input, but leave
1325 * leave it in the message so
1326 * that the service routine
1327 * can see it too.
1328 */
1329 tp->t_state |= TS_PLNCH;
1330 tp->t_modes.c_lflag &= ~FLUSHO;
1331 *writep++ = c;
1332 continue;
1333 }
1334 if (c == tp->t_modes.c_cc[VDISCARD]) {
1335 ldterm_flush_output(c, wrq, tp);
1336 continue;
1337 }
1338 }
1339 tp->t_modes.c_lflag &= ~FLUSHO;
1340
1341 /*
1342 * Check for signal-generating
1343 * characters.
1344 */
1345 if (tp->t_modes.c_lflag & ISIG) {
1346 if (c == tp->t_modes.c_cc[VINTR]) {
1347 ldterm_dosig(q, SIGINT, c,
1348 M_PCSIG, FLUSHRW);
1349 continue;
1350 }
1351 if (c == tp->t_modes.c_cc[VQUIT]) {
1352 ldterm_dosig(q, SIGQUIT, c,
1353 M_PCSIG, FLUSHRW);
1354 continue;
1355 }
1356 if (c == tp->t_modes.c_cc[VSWTCH]) {
1357 /*
1358 * Ancient SXT support; discard
1359 * character without action.
1360 */
1361 continue;
1362 }
1363 if (c == tp->t_modes.c_cc[VSUSP]) {
1364 ldterm_dosig(q, SIGTSTP, c,
1365 M_PCSIG, FLUSHRW);
1366 continue;
1367 }
1368 if ((tp->t_modes.c_lflag & IEXTEN) &&
1369 (c == tp->t_modes.c_cc[VDSUSP])) {
1370 ldterm_dosig(q, SIGTSTP, c,
1371 M_SIG, 0);
1372 continue;
1373 }
1374
1375 /*
1376 * Consumers do not expect the ^T to be
1377 * echoed out when we generate a
1378 * VSTATUS.
1379 */
1380 if (c == tp->t_modes.c_cc[VSTATUS]) {
1381 ldterm_dosig(q, SIGINFO, '\0',
1382 M_PCSIG, FLUSHRW);
1383 continue;
1384 }
1385 }
1386 /*
1387 * Throw away CR if IGNCR set, or
1388 * turn it into NL if ICRNL set.
1389 */
1390 if (c == '\r') {
1391 if (tp->t_modes.c_iflag & IGNCR)
1392 continue;
1393 if (tp->t_modes.c_iflag & ICRNL)
1394 c = '\n';
1395 } else {
1396 /*
1397 * Turn NL into CR if INLCR
1398 * set.
1399 */
1400 if (c == '\n' &&
1401 tp->t_modes.c_iflag & INLCR)
1402 c = '\r';
1403 }
1404
1405 /*
1406 * Map upper case input to lower case
1407 * if IUCLC flag set.
1408 */
1409 if (tp->t_modes.c_iflag & IUCLC &&
1410 c >= 'A' && c <= 'Z')
1411 c += 'a' - 'A';
1412
1413 /*
1414 * Put the possibly-transformed
1415 * character back in the message.
1416 */
1417 *writep++ = c;
1418 }
1419
1420 /*
1421 * If we didn't copy some characters because
1422 * we were ignoring them, fix the size of the
1423 * data block by adjusting the write pointer.
1424 * XXX This may result in a zero-length
1425 * block; will this cause anybody gastric
1426 * distress?
1427 */
1428 bp->b_wptr -= (readp - writep);
1429 } else {
1430 /*
1431 * We won't be doing anything other than
1432 * possibly stripping the input.
1433 */
1434 if (tp->t_modes.c_iflag & ISTRIP) {
1435 while (readp < bp->b_wptr)
1436 *writep++ = *readp++ & 0177;
1437 }
1438 tp->t_modes.c_lflag &= ~FLUSHO;
1439 }
1440
1441 } while ((bp = bp->b_cont) != NULL); /* next block, if any */
1442
1443 /*
1444 * Queue the message for service procedure if the
1445 * queue is not empty or canputnext() fails or
1446 * tp->t_state & TS_RESCAN is true.
1447 */
1448
1449 if (q->q_first != NULL || !bcanputnext(q, mp->b_band) ||
1450 (tp->t_state & TS_RESCAN))
1451 (void) putq(q, mp);
1452 else
1453 (void) ldtermrmsg(q, mp);
1454
1455 /*
1456 * Flow control: send "stop input" message if our queue is
1457 * approaching its high-water mark. The message will be
1458 * dropped on the floor in the service procedure, if we
1459 * cannot ship it up and we have had it upto our neck!
1460 *
1461 * Set QWANTW to ensure that the read queue service procedure
1462 * gets run when nextq empties up again, so that it can
1463 * unstop the input.
1464 */
1465 if ((tp->t_modes.c_iflag & IXOFF) && !(tp->t_state & TS_TBLOCK) &&
1466 q->q_count >= TTXOHI) {
1467 mutex_enter(QLOCK(nextq));
1468 nextq->q_flag |= QWANTW;
1469 mutex_exit(QLOCK(nextq));
1470 tp->t_state |= TS_TBLOCK;
1471 (void) putnextctl(wrq, M_STOPI);
1472 DEBUG1(("M_STOPI down\n"));
1473 }
1474 return (0);
1475 }
1476
1477
1478 /*
1479 * Line discipline input server processing. Erase/kill and escape
1480 * ('\') processing, gathering into messages, upper/lower case input
1481 * mapping.
1482 */
1483 static int
1484 ldtermrsrv(queue_t *q)
1485 {
1486 ldtermstd_state_t *tp;
1487 mblk_t *mp;
1488
1489 tp = (ldtermstd_state_t *)q->q_ptr;
1490
1491 if (tp->t_state & TS_RESCAN) {
1492 /*
1493 * Canonicalization was turned on or off. Put the
1494 * message being assembled back in the input queue,
1495 * so that we rescan it.
1496 */
1497 if (tp->t_message != NULL) {
1498 DEBUG5(("RESCAN WAS SET; put back in q\n"));
1499 if (tp->t_msglen != 0)
1500 (void) putbq(q, tp->t_message);
1501 else
1502 freemsg(tp->t_message);
1503 tp->t_message = NULL;
1504 tp->t_endmsg = NULL;
1505 tp->t_msglen = 0;
1506 }
1507 if (tp->t_state & TS_MEUC) {
1508 ASSERT(tp->t_eucp_mp);
1509 tp->t_eucp = tp->t_eucp_mp->b_rptr;
1510 tp->t_codeset = 0;
1511 tp->t_eucleft = 0;
1512 }
1513 tp->t_state &= ~TS_RESCAN;
1514 }
1515
1516 while ((mp = getq(q)) != NULL) {
1517 if (!ldtermrmsg(q, mp))
1518 break;
1519 }
1520
1521 /*
1522 * Flow control: send start message if blocked and our queue
1523 * is below its low water mark.
1524 */
1525 if ((tp->t_modes.c_iflag & IXOFF) && (tp->t_state & TS_TBLOCK) &&
1526 !(tp->t_state & TS_IFBLOCK) && q->q_count <= TTXOLO) {
1527 tp->t_state &= ~TS_TBLOCK;
1528 (void) putctl(WR(q), M_STARTI);
1529 }
1530 return (0);
1531 }
1532
1533 /*
1534 * This routine is called from both ldtermrput and ldtermrsrv to
1535 * do the actual work of dealing with mp. Return 1 on sucesss and
1536 * 0 on failure.
1537 */
1538 static int
1539 ldtermrmsg(queue_t *q, mblk_t *mp)
1540 {
1541 unsigned char c;
1542 int dofree;
1543 int status = 1;
1544 size_t ebsize;
1545 mblk_t *bp;
1546 mblk_t *bpt;
1547 ldtermstd_state_t *tp;
1548
1549 bpt = NULL;
1550
1551 tp = (ldtermstd_state_t *)q->q_ptr;
1552
1553 if (mp->b_datap->db_type <= QPCTL && !bcanputnext(q, mp->b_band)) {
1554 /*
1555 * Stream head is flow controlled. If echo is
1556 * turned on, flush the read side or send a
1557 * bell down the line to stop input and
1558 * process the current message.
1559 * Otherwise(putbq) the user will not see any
1560 * response to to the typed input. Typically
1561 * happens if there is no reader process.
1562 * Note that you will loose the data in this
1563 * case if the data is coming too fast. There
1564 * is an assumption here that if ECHO is
1565 * turned on its some user typing the data on
1566 * a terminal and its not network.
1567 */
1568 if (tp->t_modes.c_lflag & ECHO) {
1569 if ((tp->t_modes.c_iflag & IMAXBEL) &&
1570 (tp->t_modes.c_lflag & ICANON)) {
1571 freemsg(mp);
1572 if (canputnext(WR(q)))
1573 ldterm_outchar(CTRL('g'), WR(q), 4, tp);
1574 status = 0;
1575 goto echo;
1576 } else {
1577 (void) putctl1(q, M_FLUSH, FLUSHR);
1578 }
1579 } else {
1580 (void) putbq(q, mp);
1581 status = 0;
1582 goto out; /* read side is blocked */
1583 }
1584 }
1585 switch (mp->b_datap->db_type) {
1586
1587 default:
1588 putnext(q, mp); /* pass it on */
1589 goto out;
1590
1591 case M_HANGUP:
1592 /*
1593 * Flush everything we haven't looked at yet.
1594 */
1595 flushq(q, FLUSHDATA);
1596
1597 /*
1598 * Flush everything we have looked at.
1599 */
1600 freemsg(tp->t_message);
1601 tp->t_message = NULL;
1602 tp->t_endmsg = NULL;
1603 tp->t_msglen = 0;
1604 /*
1605 * XXX should we set read request
1606 * tp->t_rd_request to NULL?
1607 */
1608 tp->t_rocount = 0; /* if it hasn't been typed */
1609 tp->t_rocol = 0; /* it hasn't been echoed :-) */
1610 if (tp->t_state & TS_MEUC) {
1611 ASSERT(tp->t_eucp_mp);
1612 tp->t_eucp = tp->t_eucp_mp->b_rptr;
1613 }
1614 /*
1615 * Restart output, since it's probably got
1616 * nowhere to go anyway, and we're probably
1617 * not going to see another ^Q for a while.
1618 */
1619 if (tp->t_state & TS_TTSTOP) {
1620 tp->t_state &= ~(TS_TTSTOP|TS_OFBLOCK);
1621 (void) putnextctl(WR(q), M_START);
1622 }
1623 /*
1624 * This message will travel up the read
1625 * queue, flushing as it goes, get turned
1626 * around at the stream head, and travel back
1627 * down the write queue, flushing as it goes.
1628 */
1629 (void) putnextctl1(q, M_FLUSH, FLUSHW);
1630
1631 /*
1632 * This message will travel down the write
1633 * queue, flushing as it goes, get turned
1634 * around at the driver, and travel back up
1635 * the read queue, flushing as it goes.
1636 */
1637 (void) putctl1(WR(q), M_FLUSH, FLUSHR);
1638
1639 /*
1640 * Now that that's done, we send a SIGCONT
1641 * upstream, followed by the M_HANGUP.
1642 */
1643 /* (void) putnextctl1(q, M_PCSIG, SIGCONT); */
1644 putnext(q, mp);
1645 goto out;
1646
1647 case M_IOCACK:
1648
1649 /*
1650 * Augment whatever information the driver is
1651 * returning with the information we supply.
1652 */
1653 ldterm_ioctl_reply(q, mp);
1654 goto out;
1655
1656 case M_DATA:
1657 break;
1658 }
1659
1660 /*
1661 * This is an M_DATA message.
1662 */
1663
1664 /*
1665 * If somebody below us ("intelligent" communications
1666 * board, pseudo-tty controlled by an editor) is
1667 * doing canonicalization, don't scan it for special
1668 * characters.
1669 */
1670 if (tp->t_state & TS_NOCANON) {
1671 putnext(q, mp);
1672 goto out;
1673 }
1674 bp = mp;
1675
1676 if ((bpt = newmsg(tp)) != NULL) {
1677 mblk_t *bcont;
1678
1679 do {
1680 ASSERT(bp->b_wptr >= bp->b_rptr);
1681 ebsize = bp->b_wptr - bp->b_rptr;
1682 if (ebsize > EBSIZE)
1683 ebsize = EBSIZE;
1684 bcont = bp->b_cont;
1685 if (CANON_MODE) {
1686 /*
1687 * By default, free the message once processed
1688 */
1689 dofree = 1;
1690
1691 /*
1692 * update sysinfo canch
1693 * character. The value of
1694 * canch may vary as compared
1695 * to character tty
1696 * implementation.
1697 */
1698 while (bp->b_rptr < bp->b_wptr) {
1699 c = *bp->b_rptr++;
1700 if ((bpt = ldterm_docanon(c,
1701 bpt, ebsize, q, tp, &dofree)) ==
1702 NULL)
1703 break;
1704 }
1705 /*
1706 * Release this block or put back on queue.
1707 */
1708 if (dofree)
1709 freeb(bp);
1710 else {
1711 (void) putbq(q, bp);
1712 break;
1713 }
1714 } else
1715 bpt = ldterm_dononcanon(bp, bpt, ebsize, q, tp);
1716 if (bpt == NULL) {
1717 cmn_err(CE_WARN,
1718 "ldtermrsrv: out of blocks");
1719 freemsg(bcont);
1720 break;
1721 }
1722 } while ((bp = bcont) != NULL);
1723 }
1724 echo:
1725 /*
1726 * Send whatever we echoed downstream.
1727 */
1728 if (tp->t_echomp != NULL) {
1729 if (canputnext(WR(q)))
1730 putnext(WR(q), tp->t_echomp);
1731 else
1732 freemsg(tp->t_echomp);
1733 tp->t_echomp = NULL;
1734 }
1735
1736 out:
1737 return (status);
1738 }
1739
1740
1741 /*
1742 * Do canonical mode input; check whether this character is to be
1743 * treated as a special character - if so, check whether it's equal
1744 * to any of the special characters and handle it accordingly.
1745 * Otherwise, just add it to the current line.
1746 */
1747 static mblk_t *
1748 ldterm_docanon(uchar_t c, mblk_t *bpt, size_t ebsize, queue_t *q,
1749 ldtermstd_state_t *tp, int *dofreep)
1750 {
1751 queue_t *wrq = WR(q);
1752 int i;
1753
1754 /*
1755 * If the previous character was the "literal next"
1756 * character, treat this character as regular input.
1757 */
1758 if (tp->t_state & TS_SLNCH)
1759 goto escaped;
1760
1761 /*
1762 * Setting a special character to NUL disables it, so if this
1763 * character is NUL, it should not be compared with any of
1764 * the special characters.
1765 */
1766 if (c == _POSIX_VDISABLE) {
1767 tp->t_state &= ~TS_QUOT;
1768 goto escaped;
1769 }
1770 /*
1771 * If this character is the literal next character, echo it
1772 * as '^', backspace over it, and record that fact.
1773 */
1774 if ((tp->t_modes.c_lflag & IEXTEN) && c == tp->t_modes.c_cc[VLNEXT]) {
1775 if (tp->t_modes.c_lflag & ECHO)
1776 ldterm_outstring((unsigned char *)"^\b", 2, wrq,
1777 ebsize, tp);
1778 tp->t_state |= TS_SLNCH;
1779 goto out;
1780 }
1781 /*
1782 * Check for the editing character. If the display width of
1783 * the last byte at the canonical buffer is not one and also
1784 * smaller than or equal to UNKNOWN_WIDTH, the character at
1785 * the end of the buffer is a multi-byte and/or multi-column
1786 * character.
1787 */
1788 if (c == tp->t_modes.c_cc[VERASE] || c == tp->t_modes.c_cc[VERASE2]) {
1789 if (tp->t_state & TS_QUOT) {
1790 /*
1791 * Get rid of the backslash, and put the
1792 * erase character in its place.
1793 */
1794 ldterm_erase(wrq, ebsize, tp);
1795 bpt = tp->t_endmsg;
1796 goto escaped;
1797 } else {
1798 if ((tp->t_state & TS_MEUC) && tp->t_msglen &&
1799 (*(tp->t_eucp - 1) != 1 &&
1800 *(tp->t_eucp - 1) <= UNKNOWN_WIDTH))
1801 ldterm_csi_erase(wrq, ebsize, tp);
1802 else
1803 ldterm_erase(wrq, ebsize, tp);
1804 bpt = tp->t_endmsg;
1805 goto out;
1806 }
1807 }
1808 if ((tp->t_modes.c_lflag & IEXTEN) && c == tp->t_modes.c_cc[VWERASE]) {
1809 /*
1810 * Do "ASCII word" or "multibyte character token/chunk" erase.
1811 */
1812 if (tp->t_state & TS_MEUC)
1813 ldterm_csi_werase(wrq, ebsize, tp);
1814 else
1815 ldterm_werase(wrq, ebsize, tp);
1816 bpt = tp->t_endmsg;
1817 goto out;
1818 }
1819 if (c == tp->t_modes.c_cc[VKILL]) {
1820 if (tp->t_state & TS_QUOT) {
1821 /*
1822 * Get rid of the backslash, and put the kill
1823 * character in its place.
1824 */
1825 ldterm_erase(wrq, ebsize, tp);
1826 bpt = tp->t_endmsg;
1827 goto escaped;
1828 } else {
1829 ldterm_kill(wrq, ebsize, tp);
1830 bpt = tp->t_endmsg;
1831 goto out;
1832 }
1833 }
1834 if ((tp->t_modes.c_lflag & IEXTEN) && c == tp->t_modes.c_cc[VREPRINT]) {
1835 ldterm_reprint(wrq, ebsize, tp);
1836 goto out;
1837 }
1838 /*
1839 * If the preceding character was a backslash: if the current
1840 * character is an EOF, get rid of the backslash and treat
1841 * the EOF as data; if we're in XCASE mode and the current
1842 * character is part of a backslash-X escape sequence,
1843 * process it; otherwise, just treat the current character
1844 * normally.
1845 */
1846 if (tp->t_state & TS_QUOT) {
1847 tp->t_state &= ~TS_QUOT;
1848 if (c == tp->t_modes.c_cc[VEOF]) {
1849 /*
1850 * EOF character. Since it's escaped, get rid
1851 * of the backslash and put the EOF character
1852 * in its place.
1853 */
1854 ldterm_erase(wrq, ebsize, tp);
1855 bpt = tp->t_endmsg;
1856 } else {
1857 /*
1858 * If we're in XCASE mode, and the current
1859 * character is part of a backslash-X
1860 * sequence, get rid of the backslash and
1861 * replace the current character with what
1862 * that sequence maps to.
1863 */
1864 if ((tp->t_modes.c_lflag & XCASE) &&
1865 imaptab[c] != '\0') {
1866 ldterm_erase(wrq, ebsize, tp);
1867 bpt = tp->t_endmsg;
1868 c = imaptab[c];
1869 }
1870 }
1871 } else {
1872 /*
1873 * Previous character wasn't backslash; check whether
1874 * this was the EOF character.
1875 */
1876 if (c == tp->t_modes.c_cc[VEOF]) {
1877 /*
1878 * EOF character. Don't echo it unless
1879 * ECHOCTL is set, don't stuff it in the
1880 * current line, but send the line up the
1881 * stream.
1882 */
1883 if ((tp->t_modes.c_lflag & ECHOCTL) &&
1884 (tp->t_modes.c_lflag & IEXTEN) &&
1885 (tp->t_modes.c_lflag & ECHO)) {
1886 i = ldterm_echo(c, wrq, ebsize, tp);
1887 while (i > 0) {
1888 ldterm_outchar('\b', wrq, ebsize, tp);
1889 i--;
1890 }
1891 }
1892 bpt->b_datap->db_type = M_DATA;
1893 ldterm_msg_upstream(q, tp);
1894 if (!canputnext(q)) {
1895 bpt = NULL;
1896 *dofreep = 0;
1897 } else {
1898 bpt = newmsg(tp);
1899 *dofreep = 1;
1900 }
1901 goto out;
1902 }
1903 }
1904
1905 escaped:
1906 /*
1907 * First, make sure we can fit one WHOLE multi-byte char in the
1908 * buffer. This is one place where we have overhead even if
1909 * not in multi-byte mode; the overhead is subtracting
1910 * tp->t_maxeuc from MAX_CANON before checking.
1911 *
1912 * Allows MAX_CANON bytes in the buffer before throwing awaying
1913 * the the overflow of characters.
1914 */
1915 if ((tp->t_msglen > ((_TTY_BUFSIZ + 1) - (int)tp->t_maxeuc)) &&
1916 !((tp->t_state & TS_MEUC) && tp->t_eucleft)) {
1917
1918 /*
1919 * Byte will cause line to overflow, or the next EUC
1920 * won't fit: Ring the bell or discard all input, and
1921 * don't save the byte away.
1922 */
1923 if (tp->t_modes.c_iflag & IMAXBEL) {
1924 if (canputnext(wrq))
1925 ldterm_outchar(CTRL('g'), wrq, ebsize, tp);
1926 goto out;
1927 } else {
1928 /*
1929 * MAX_CANON processing. free everything in
1930 * the current line and start with the
1931 * current character as the first character.
1932 */
1933 DEBUG7(("ldterm_docanon: MAX_CANON processing\n"));
1934 freemsg(tp->t_message);
1935 tp->t_message = NULL;
1936 tp->t_endmsg = NULL;
1937 tp->t_msglen = 0;
1938 tp->t_rocount = 0; /* if it hasn't been type */
1939 tp->t_rocol = 0; /* it hasn't been echoed :-) */
1940 if (tp->t_state & TS_MEUC) {
1941 ASSERT(tp->t_eucp_mp);
1942 tp->t_eucp = tp->t_eucp_mp->b_rptr;
1943 }
1944 tp->t_state &= ~TS_SLNCH;
1945 bpt = newmsg(tp);
1946 }
1947 }
1948 /*
1949 * Add the character to the current line.
1950 */
1951 if (bpt->b_wptr >= bpt->b_datap->db_lim) {
1952 /*
1953 * No more room in this mblk; save this one away, and
1954 * allocate a new one.
1955 */
1956 bpt->b_datap->db_type = M_DATA;
1957 if ((bpt = allocb(IBSIZE, BPRI_MED)) == NULL)
1958 goto out;
1959
1960 /*
1961 * Chain the new one to the end of the old one, and
1962 * mark it as the last block in the current line.
1963 */
1964 tp->t_endmsg->b_cont = bpt;
1965 tp->t_endmsg = bpt;
1966 }
1967 *bpt->b_wptr++ = c;
1968 tp->t_msglen++; /* message length in BYTES */
1969
1970 /*
1971 * In multi-byte mode, we have to keep track of where we are.
1972 * The first bytes of multi-byte chars get the full count for the
1973 * whole character. We don't do any column calculations
1974 * here, but we need the information for when we do. We could
1975 * come across cases where we are getting garbage on the
1976 * line, but we're in multi-byte mode. In that case, we may
1977 * see ASCII controls come in the middle of what should have been a
1978 * multi-byte character. Call ldterm_eucwarn...eventually, a
1979 * warning message will be printed about it.
1980 */
1981 if (tp->t_state & TS_MEUC) {
1982 if (tp->t_eucleft) { /* if in a multi-byte char already */
1983 --tp->t_eucleft;
1984 *tp->t_eucp++ = 0; /* is a subsequent byte */
1985 if (c < (uchar_t)0x20)
1986 ldterm_eucwarn(tp);
1987 } else { /* is the first byte of a multi-byte, or is ASCII */
1988 if (ISASCII(c)) {
1989 *tp->t_eucp++ =
1990 tp->t_csmethods.ldterm_dispwidth(c,
1991 (void *)tp, tp->t_modes.c_lflag & ECHOCTL);
1992 tp->t_codeset = 0;
1993 } else {
1994 *tp->t_eucp++ =
1995 tp->t_csmethods.ldterm_dispwidth(c,
1996 (void *)tp, tp->t_modes.c_lflag & ECHOCTL);
1997 tp->t_eucleft =
1998 tp->t_csmethods.ldterm_memwidth(c,
1999 (void *)tp) - 1;
2000 tp->t_codeset = ldterm_codeset(
2001 tp->t_csdata.codeset_type, c);
2002 }
2003 }
2004 }
2005 /*
2006 * AT&T is concerned about the following but we aren't since
2007 * we have already shipped code that works.
2008 *
2009 * EOL2/XCASE should be conditioned with IEXTEN to be truly
2010 * POSIX conformant. This is going to cause problems for
2011 * pre-SVR4.0 programs that don't know about IEXTEN. Hence
2012 * EOL2/IEXTEN is not conditioned with IEXTEN.
2013 */
2014 if (!(tp->t_state & TS_SLNCH) &&
2015 (c == '\n' || (c != '\0' && (c == tp->t_modes.c_cc[VEOL] ||
2016 (c == tp->t_modes.c_cc[VEOL2]))))) {
2017 /*
2018 * || ((tp->t_modes.c_lflag & IEXTEN) && c ==
2019 * tp->t_modes.c_cc[VEOL2]))))) {
2020 */
2021 /*
2022 * It's a line-termination character; send the line
2023 * up the stream.
2024 */
2025 bpt->b_datap->db_type = M_DATA;
2026 ldterm_msg_upstream(q, tp);
2027 if (tp->t_state & TS_MEUC) {
2028 ASSERT(tp->t_eucp_mp);
2029 tp->t_eucp = tp->t_eucp_mp->b_rptr;
2030 }
2031 if ((bpt = newmsg(tp)) == NULL)
2032 goto out;
2033 } else {
2034 /*
2035 * Character was escaped with LNEXT.
2036 */
2037 if (tp->t_rocount++ == 0)
2038 tp->t_rocol = tp->t_col;
2039 tp->t_state &= ~(TS_SLNCH|TS_QUOT);
2040 /*
2041 * If the current character is a single byte and single
2042 * column character and it is the backslash character and
2043 * IEXTEN, then the state will have TS_QUOT.
2044 */
2045 if ((c == '\\') && (tp->t_modes.c_lflag & IEXTEN) &&
2046 (!(tp->t_state & TS_MEUC) ||
2047 ((tp->t_state & TS_MEUC) && (!tp->t_eucleft))))
2048 tp->t_state |= TS_QUOT;
2049 }
2050
2051 /*
2052 * Echo it.
2053 */
2054 if (tp->t_state & TS_ERASE) {
2055 tp->t_state &= ~TS_ERASE;
2056 if (tp->t_modes.c_lflag & ECHO)
2057 ldterm_outchar('/', wrq, ebsize, tp);
2058 }
2059 if (tp->t_modes.c_lflag & ECHO)
2060 (void) ldterm_echo(c, wrq, ebsize, tp);
2061 else {
2062 /*
2063 * Echo NL when ECHO turned off, if ECHONL flag is
2064 * set.
2065 */
2066 if (c == '\n' && (tp->t_modes.c_lflag & ECHONL))
2067 ldterm_outchar(c, wrq, ebsize, tp);
2068 }
2069
2070 out:
2071
2072 return (bpt);
2073 }
2074
2075
2076 static int
2077 ldterm_unget(ldtermstd_state_t *tp)
2078 {
2079 mblk_t *bpt;
2080
2081 if ((bpt = tp->t_endmsg) == NULL)
2082 return (-1); /* no buffers */
2083 if (bpt->b_rptr == bpt->b_wptr)
2084 return (-1); /* zero-length record */
2085 tp->t_msglen--; /* one fewer character */
2086 return (*--bpt->b_wptr);
2087 }
2088
2089
2090 static void
2091 ldterm_trim(ldtermstd_state_t *tp)
2092 {
2093 mblk_t *bpt;
2094 mblk_t *bp;
2095
2096 ASSERT(tp->t_endmsg);
2097 bpt = tp->t_endmsg;
2098
2099 if (bpt->b_rptr == bpt->b_wptr) {
2100 /*
2101 * This mblk is now empty. Find the previous mblk;
2102 * throw this one away, unless it's the first one.
2103 */
2104 bp = tp->t_message;
2105 if (bp != bpt) {
2106 while (bp->b_cont != bpt) {
2107 ASSERT(bp->b_cont);
2108 bp = bp->b_cont;
2109 }
2110 bp->b_cont = NULL;
2111 freeb(bpt);
2112 tp->t_endmsg = bp; /* point to that mblk */
2113 }
2114 }
2115 }
2116
2117
2118 /*
2119 * Rubout one character from the current line being built for tp as
2120 * cleanly as possible. q is the write queue for tp. Most of this
2121 * can't be applied to multi-byte processing. We do our own thing
2122 * for that... See the "ldterm_eucerase" routine. We never call
2123 * ldterm_rubout on a multi-byte or multi-column character.
2124 */
2125 static void
2126 ldterm_rubout(uchar_t c, queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2127 {
2128 int tabcols;
2129 static unsigned char crtrubout[] = "\b \b\b \b";
2130 #define RUBOUT1 &crtrubout[3] /* rub out one position */
2131 #define RUBOUT2 &crtrubout[0] /* rub out two positions */
2132
2133 if (!(tp->t_modes.c_lflag & ECHO))
2134 return;
2135 if (tp->t_modes.c_lflag & ECHOE) {
2136 /*
2137 * "CRT rubout"; try erasing it from the screen.
2138 */
2139 if (tp->t_rocount == 0) {
2140 /*
2141 * After the character being erased was
2142 * echoed, some data was written to the
2143 * terminal; we can't erase it cleanly, so we
2144 * just reprint the whole line as if the user
2145 * had typed the reprint character.
2146 */
2147 ldterm_reprint(q, ebsize, tp);
2148 return;
2149 } else {
2150 /*
2151 * XXX what about escaped characters?
2152 */
2153 switch (typetab[c]) {
2154
2155 case ORDINARY:
2156 if ((tp->t_modes.c_lflag & XCASE) &&
2157 omaptab[c])
2158 ldterm_outstring(RUBOUT1, 3, q, ebsize,
2159 tp);
2160 ldterm_outstring(RUBOUT1, 3, q, ebsize, tp);
2161 break;
2162
2163 case VTAB:
2164 case BACKSPACE:
2165 case CONTROL:
2166 case RETURN:
2167 case NEWLINE:
2168 if ((tp->t_modes.c_lflag & ECHOCTL) &&
2169 (tp->t_modes.c_lflag & IEXTEN))
2170 ldterm_outstring(RUBOUT2, 6, q, ebsize,
2171 tp);
2172 break;
2173
2174 case TAB:
2175 if (tp->t_rocount < tp->t_msglen) {
2176 /*
2177 * While the tab being erased was
2178 * expanded, some data was written
2179 * to the terminal; we can't erase
2180 * it cleanly, so we just reprint
2181 * the whole line as if the user
2182 * had typed the reprint character.
2183 */
2184 ldterm_reprint(q, ebsize, tp);
2185 return;
2186 }
2187 tabcols = ldterm_tabcols(tp);
2188 while (--tabcols >= 0)
2189 ldterm_outchar('\b', q, ebsize, tp);
2190 break;
2191 }
2192 }
2193 } else if ((tp->t_modes.c_lflag & ECHOPRT) &&
2194 (tp->t_modes.c_lflag & IEXTEN)) {
2195 /*
2196 * "Printing rubout"; echo it between \ and /.
2197 */
2198 if (!(tp->t_state & TS_ERASE)) {
2199 ldterm_outchar('\\', q, ebsize, tp);
2200 tp->t_state |= TS_ERASE;
2201 }
2202 (void) ldterm_echo(c, q, ebsize, tp);
2203 } else
2204 (void) ldterm_echo(tp->t_modes.c_cc[VERASE], q, ebsize, tp);
2205 tp->t_rocount--; /* we "unechoed" this character */
2206 }
2207
2208
2209 /*
2210 * Find the number of characters the tab we just deleted took up by
2211 * zipping through the current line and recomputing the column
2212 * number.
2213 */
2214 static int
2215 ldterm_tabcols(ldtermstd_state_t *tp)
2216 {
2217 int col;
2218 int i;
2219 mblk_t *bp;
2220 unsigned char *readp, *endp;
2221 unsigned char c;
2222 uchar_t *startp;
2223 char errflg;
2224 uchar_t u8[LDTERM_CS_MAX_BYTE_LENGTH];
2225
2226 col = tp->t_rocol;
2227 /*
2228 * If we're doing multi-byte stuff, zip through the list of
2229 * widths to figure out where we are (we've kept track in most
2230 * cases).
2231 */
2232 if (tp->t_state & TS_MEUC) {
2233 ASSERT(tp->t_eucp_mp);
2234 bp = tp->t_message;
2235 startp = bp->b_datap->db_base;
2236 readp = tp->t_eucp_mp->b_rptr;
2237 endp = tp->t_eucp;
2238 errflg = (char)0;
2239 while (readp < endp) {
2240 switch (*readp) {
2241 case EUC_TWIDTH: /* it's a tab */
2242 col |= 07; /* bump up */
2243 col++;
2244 break;
2245 case EUC_BSWIDTH: /* backspace */
2246 if (col)
2247 col--;
2248 break;
2249 case EUC_NLWIDTH: /* newline */
2250 if (tp->t_modes.c_oflag & ONLRET)
2251 col = 0;
2252 break;
2253 case EUC_CRWIDTH: /* return */
2254 col = 0;
2255 break;
2256 case UNKNOWN_WIDTH: /* UTF-8 unknown width */
2257 if (tp->t_csdata.codeset_type !=
2258 LDTERM_CS_TYPE_UTF8 || errflg) {
2259 *readp = 1;
2260 col++;
2261 break;
2262 }
2263 /*
2264 * Collect the current UTF-8 character bytes
2265 * from (possibly multiple) data buffers so
2266 * that we can figure out the display width.
2267 */
2268 u8[0] = *startp;
2269 for (i = 1; (i < LDTERM_CS_MAX_BYTE_LENGTH) &&
2270 (*(readp + i) == 0); i++) {
2271 startp++;
2272 if (startp >= bp->b_datap->db_lim) {
2273 if (bp->b_cont) {
2274 bp = bp->b_cont;
2275 startp =
2276 bp->b_datap->
2277 db_base;
2278 } else {
2279 *readp = 1;
2280 col++;
2281 break;
2282 }
2283 }
2284 u8[i] = *startp;
2285 }
2286
2287 /* tp->t_eucp_mp contains wrong info?? */
2288 if (*readp == 1)
2289 break;
2290
2291 *readp = ldterm_utf8_width(u8, i);
2292
2293 col += *readp;
2294 readp += (i - 1);
2295 break;
2296 default:
2297 col += *readp;
2298 break;
2299 }
2300 ++readp;
2301 ++startp;
2302 if (startp >= bp->b_datap->db_lim) {
2303 if (bp->b_cont) {
2304 bp = bp->b_cont;
2305 startp = bp->b_datap->db_base;
2306 } else {
2307 /*
2308 * This will happen only if
2309 * tp->t_eucp_mp contains wrong
2310 * display width info.
2311 */
2312 errflg = (char)1;
2313 startp--;
2314 }
2315 }
2316 }
2317 goto eucout; /* finished! */
2318 }
2319 bp = tp->t_message;
2320 do {
2321 readp = bp->b_rptr;
2322 while (readp < bp->b_wptr) {
2323 c = *readp++;
2324 if ((tp->t_modes.c_lflag & ECHOCTL) &&
2325 (tp->t_modes.c_lflag & IEXTEN)) {
2326 if (c <= 037 && c != '\t' && c != '\n' ||
2327 c == 0177) {
2328 col += 2;
2329 continue;
2330 }
2331 }
2332 /*
2333 * Column position calculated here.
2334 */
2335 switch (typetab[c]) {
2336
2337 /*
2338 * Ordinary characters; advance by
2339 * one.
2340 */
2341 case ORDINARY:
2342 col++;
2343 break;
2344
2345 /*
2346 * Non-printing characters; nothing
2347 * happens.
2348 */
2349 case CONTROL:
2350 break;
2351
2352 /* Backspace */
2353 case BACKSPACE:
2354 if (col != 0)
2355 col--;
2356 break;
2357
2358 /* Newline; column depends on flags. */
2359 case NEWLINE:
2360 if (tp->t_modes.c_oflag & ONLRET)
2361 col = 0;
2362 break;
2363
2364 /* tab */
2365 case TAB:
2366 col |= 07;
2367 col++;
2368 break;
2369
2370 /* vertical motion */
2371 case VTAB:
2372 break;
2373
2374 /* carriage return */
2375 case RETURN:
2376 col = 0;
2377 break;
2378 }
2379 }
2380 } while ((bp = bp->b_cont) != NULL); /* next block, if any */
2381
2382 /*
2383 * "col" is now the column number before the tab. "tp->t_col"
2384 * is still the column number after the tab, since we haven't
2385 * erased the tab yet. Thus "tp->t_col - col" is the number
2386 * of positions the tab moved.
2387 */
2388 eucout:
2389 col = tp->t_col - col;
2390 if (col > 8)
2391 col = 8; /* overflow screw */
2392 return (col);
2393 }
2394
2395
2396 /*
2397 * Erase a single character; We ONLY ONLY deal with ASCII or
2398 * single-column single-byte codeset character. For multi-byte characters,
2399 * see "ldterm_csi_erase".
2400 */
2401 static void
2402 ldterm_erase(queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2403 {
2404 int c;
2405
2406 if ((c = ldterm_unget(tp)) != -1) {
2407 ldterm_rubout((unsigned char) c, q, ebsize, tp);
2408 ldterm_trim(tp);
2409 if (tp->t_state & TS_MEUC)
2410 --tp->t_eucp;
2411 }
2412 }
2413
2414
2415 /*
2416 * Erase an entire word, single-byte EUC only please.
2417 */
2418 static void
2419 ldterm_werase(queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2420 {
2421 int c;
2422
2423 /*
2424 * Erase trailing white space, if any.
2425 */
2426 while ((c = ldterm_unget(tp)) == ' ' || c == '\t') {
2427 ldterm_rubout((unsigned char) c, q, ebsize, tp);
2428 ldterm_trim(tp);
2429 }
2430
2431 /*
2432 * Erase non-white-space characters, if any.
2433 */
2434 while (c != -1 && c != ' ' && c != '\t') {
2435 ldterm_rubout((unsigned char) c, q, ebsize, tp);
2436 ldterm_trim(tp);
2437 c = ldterm_unget(tp);
2438 }
2439 if (c != -1) {
2440 /*
2441 * We removed one too many characters; put the last
2442 * one back.
2443 */
2444 tp->t_endmsg->b_wptr++; /* put 'c' back */
2445 tp->t_msglen++;
2446 }
2447 }
2448
2449
2450 /*
2451 * ldterm_csi_werase - This is multi-byte equivalent of "word erase".
2452 * "Word erase" only makes sense in languages which space between words,
2453 * and it's presumptuous for us to attempt "word erase" when we don't
2454 * know anything about what's really going on. It makes no sense for
2455 * many languages, as the criteria for defining words and tokens may
2456 * be completely different.
2457 *
2458 * In the TS_MEUC case (which is how we got here), we define a token to
2459 * be space- or tab-delimited, and erase one of them. It helps to
2460 * have this for command lines, but it's otherwise useless for text
2461 * editing applications; you need more sophistication than we can
2462 * provide here.
2463 */
2464 static void
2465 ldterm_csi_werase(queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2466 {
2467 int c, i;
2468 int len;
2469 uchar_t *ip;
2470 uchar_t u8[LDTERM_CS_MAX_BYTE_LENGTH];
2471 uchar_t u8_2[LDTERM_CS_MAX_BYTE_LENGTH];
2472
2473 /*
2474 * ip points to the width of the actual bytes. t_eucp points
2475 * one byte beyond, where the next thing will be inserted.
2476 */
2477 ip = tp->t_eucp - 1;
2478 /*
2479 * Erase trailing white space, if any.
2480 */
2481 while ((c = ldterm_unget(tp)) == ' ' || c == '\t') {
2482 tp->t_eucp--;
2483 ldterm_rubout((unsigned char) c, q, ebsize, tp);
2484 ldterm_trim(tp);
2485 --ip;
2486 }
2487
2488 /*
2489 * Erase non-white-space characters, if any. The outer loop
2490 * bops through each byte in the buffer. Multi-byte is removed, as
2491 * is ASCII, one byte at a time. The inner loop (for) is only
2492 * executed for first bytes of multi-byte. The inner loop erases
2493 * the number of columns required for the multi-byte char. We check
2494 * for ASCII first, and ldterm_rubout knows about ASCII.
2495 */
2496 len = 0;
2497 while (c != -1 && c != ' ' && c != '\t') {
2498 tp->t_eucp--;
2499 if (len < LDTERM_CS_MAX_BYTE_LENGTH) {
2500 u8[len++] = (uchar_t)c;
2501 }
2502 /*
2503 * Unlike EUC, except the leading byte, some bytes of
2504 * a non-EUC multi-byte characters are in the ASCII code
2505 * range, esp., 0x41 ~ 0x7a. Thus, we cannot simply check
2506 * ISASCII().
2507 * Checking the (*ip == 1 || *ip == 2 || *ip > UNKNOWN_WIDTH)
2508 * will ensure that it is a single byte character (even though
2509 * it is on display width not byte length) and can be further
2510 * checked whether it is an ASCII character or not.
2511 *
2512 * When ECHOCTL is on and 'c' is an ASCII control character,
2513 * *ip == 2 happens.
2514 */
2515 if ((*ip == 1 || *ip == 2 || *ip > UNKNOWN_WIDTH) &&
2516 ISASCII(c)) {
2517 ldterm_rubout((unsigned char) c, q, ebsize, tp);
2518 len = 0;
2519 } else if (*ip) {
2520 if (*ip == UNKNOWN_WIDTH) {
2521 if (tp->t_csdata.codeset_type ==
2522 LDTERM_CS_TYPE_UTF8) {
2523 for (i = 0; i < len; i++)
2524 u8_2[i] = u8[len - i - 1];
2525 *ip = ldterm_utf8_width(u8_2, len);
2526 } else {
2527 *ip = 1;
2528 }
2529 }
2530 /*
2531 * erase for number of columns required for
2532 * this multi-byte character. Hopefully, matches
2533 * ldterm_dispwidth!
2534 */
2535 for (i = 0; i < (int)*ip; i++)
2536 ldterm_rubout(' ', q, ebsize, tp);
2537 len = 0;
2538 }
2539 ldterm_trim(tp);
2540 --ip;
2541 c = ldterm_unget(tp);
2542 }
2543 if (c != -1) {
2544 /*
2545 * We removed one too many characters; put the last
2546 * one back.
2547 */
2548 tp->t_endmsg->b_wptr++; /* put 'c' back */
2549 tp->t_msglen++;
2550 }
2551 }
2552
2553
2554 /*
2555 * Kill an entire line, erasing each character one-by-one (if ECHOKE
2556 * is set) or just echoing the kill character, followed by a newline
2557 * (if ECHOK is set). Multi-byte processing is included here.
2558 */
2559
2560 static void
2561 ldterm_kill(queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2562 {
2563 int c, i;
2564 int len;
2565 uchar_t *ip;
2566 uchar_t u8[LDTERM_CS_MAX_BYTE_LENGTH];
2567 uchar_t u8_2[LDTERM_CS_MAX_BYTE_LENGTH];
2568
2569 if ((tp->t_modes.c_lflag & ECHOKE) &&
2570 (tp->t_modes.c_lflag & IEXTEN) &&
2571 (tp->t_msglen == tp->t_rocount)) {
2572 if (tp->t_state & TS_MEUC) {
2573 ip = tp->t_eucp - 1;
2574 /*
2575 * This loop similar to "ldterm_csi_werase" above.
2576 */
2577 len = 0;
2578 while ((c = ldterm_unget(tp)) != (-1)) {
2579 tp->t_eucp--;
2580 if (len < LDTERM_CS_MAX_BYTE_LENGTH) {
2581 u8[len++] = (uchar_t)c;
2582 }
2583 if ((*ip == 1 || *ip == 2 ||
2584 *ip > UNKNOWN_WIDTH) && ISASCII(c)) {
2585 ldterm_rubout((unsigned char) c, q,
2586 ebsize, tp);
2587 len = 0;
2588 } else if (*ip) {
2589 if (*ip == UNKNOWN_WIDTH) {
2590 if (tp->t_csdata.codeset_type
2591 == LDTERM_CS_TYPE_UTF8) {
2592 for (i = 0; i < len;
2593 i++)
2594 u8_2[i] =
2595 u8[len-i-1];
2596 *ip = ldterm_utf8_width(
2597 u8_2, len);
2598 } else {
2599 *ip = 1;
2600 }
2601 }
2602 for (i = 0; i < (int)*ip; i++)
2603 ldterm_rubout(' ', q, ebsize,
2604 tp);
2605 len = 0;
2606 }
2607 ldterm_trim(tp);
2608 --ip;
2609 }
2610 } else {
2611 while ((c = ldterm_unget(tp)) != -1) {
2612 ldterm_rubout((unsigned char) c, q, ebsize, tp);
2613 ldterm_trim(tp);
2614 }
2615 }
2616 } else {
2617 (void) ldterm_echo(tp->t_modes.c_cc[VKILL], q, ebsize, tp);
2618 if (tp->t_modes.c_lflag & ECHOK)
2619 (void) ldterm_echo('\n', q, ebsize, tp);
2620 while (ldterm_unget(tp) != -1) {
2621 if (tp->t_state & TS_MEUC)
2622 --tp->t_eucp;
2623 ldterm_trim(tp);
2624 }
2625 tp->t_rocount = 0;
2626 if (tp->t_state & TS_MEUC)
2627 tp->t_eucp = tp->t_eucp_mp->b_rptr;
2628 }
2629 tp->t_state &= ~(TS_QUOT|TS_ERASE|TS_SLNCH);
2630 }
2631
2632
2633 /*
2634 * Reprint the current input line. We assume c_cc has already been
2635 * checked. XXX just the current line, not the whole queue? What
2636 * about DEFECHO mode?
2637 */
2638 static void
2639 ldterm_reprint(queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2640 {
2641 mblk_t *bp;
2642 unsigned char *readp;
2643
2644 if (tp->t_modes.c_cc[VREPRINT] != (unsigned char) 0)
2645 (void) ldterm_echo(tp->t_modes.c_cc[VREPRINT], q, ebsize, tp);
2646 ldterm_outchar('\n', q, ebsize, tp);
2647
2648 bp = tp->t_message;
2649 do {
2650 readp = bp->b_rptr;
2651 while (readp < bp->b_wptr)
2652 (void) ldterm_echo(*readp++, q, ebsize, tp);
2653 } while ((bp = bp->b_cont) != NULL); /* next block, if any */
2654
2655 tp->t_state &= ~TS_ERASE;
2656 tp->t_rocount = tp->t_msglen; /* we reechoed the entire line */
2657 tp->t_rocol = 0;
2658 }
2659
2660
2661 /*
2662 * Non canonical processing. Called with q locked from ldtermrsrv.
2663 *
2664 */
2665 static mblk_t *
2666 ldterm_dononcanon(mblk_t *bp, mblk_t *bpt, size_t ebsize, queue_t *q,
2667 ldtermstd_state_t *tp)
2668 {
2669 queue_t *wrq = WR(q);
2670 unsigned char *rptr;
2671 size_t bytes_in_bp;
2672 size_t roomleft;
2673 size_t bytes_to_move;
2674 int free_flag = 0;
2675
2676 if (tp->t_modes.c_lflag & (ECHO|ECHONL|IEXTEN)) {
2677 unsigned char *wptr;
2678 unsigned char c;
2679
2680 /*
2681 * Either we must echo the characters, or we must
2682 * echo NL, or we must check for VLNEXT. Process
2683 * characters one at a time.
2684 */
2685 rptr = bp->b_rptr;
2686 wptr = bp->b_rptr;
2687 while (rptr < bp->b_wptr) {
2688 c = *rptr++;
2689 /*
2690 * If this character is the literal next
2691 * character, echo it as '^' and backspace
2692 * over it if echoing is enabled, indicate
2693 * that the next character is to be treated
2694 * literally, and remove the LNEXT from the
2695 * input stream.
2696 *
2697 * If the *previous* character was the literal
2698 * next character, don't check whether this
2699 * is a literal next or not.
2700 */
2701 if ((tp->t_modes.c_lflag & IEXTEN) &&
2702 !(tp->t_state & TS_SLNCH) &&
2703 c != _POSIX_VDISABLE &&
2704 c == tp->t_modes.c_cc[VLNEXT]) {
2705 if (tp->t_modes.c_lflag & ECHO)
2706 ldterm_outstring(
2707 (unsigned char *)"^\b",
2708 2, wrq, ebsize, tp);
2709 tp->t_state |= TS_SLNCH;
2710 continue; /* and ignore it */
2711 }
2712 /*
2713 * Not a "literal next" character, so it
2714 * should show up as input. If it was
2715 * literal-nexted, turn off the literal-next
2716 * flag.
2717 */
2718 tp->t_state &= ~TS_SLNCH;
2719 *wptr++ = c;
2720 if (tp->t_modes.c_lflag & ECHO) {
2721 /*
2722 * Echo the character.
2723 */
2724 (void) ldterm_echo(c, wrq, ebsize, tp);
2725 } else if (tp->t_modes.c_lflag & ECHONL) {
2726 /*
2727 * Echo NL, even though ECHO is not
2728 * set.
2729 */
2730 if (c == '\n')
2731 ldterm_outchar('\n', wrq, 1, tp);
2732 }
2733 }
2734 bp->b_wptr = wptr;
2735 } else {
2736 /*
2737 * If there are any characters in this buffer, and
2738 * the first of them was literal-nexted, turn off the
2739 * literal-next flag.
2740 */
2741 if (bp->b_rptr != bp->b_wptr)
2742 tp->t_state &= ~TS_SLNCH;
2743 }
2744
2745 ASSERT(bp->b_wptr >= bp->b_rptr);
2746 bytes_in_bp = bp->b_wptr - bp->b_rptr;
2747 rptr = bp->b_rptr;
2748 while (bytes_in_bp != 0) {
2749 roomleft = bpt->b_datap->db_lim - bpt->b_wptr;
2750 if (roomleft == 0) {
2751 /*
2752 * No more room in this mblk; save this one
2753 * away, and allocate a new one.
2754 */
2755 if ((bpt = allocb(IBSIZE, BPRI_MED)) == NULL) {
2756 freeb(bp);
2757 DEBUG4(("ldterm_do_noncanon: allcob failed\n"));
2758 return (bpt);
2759 }
2760 /*
2761 * Chain the new one to the end of the old
2762 * one, and mark it as the last block in the
2763 * current lump.
2764 */
2765 tp->t_endmsg->b_cont = bpt;
2766 tp->t_endmsg = bpt;
2767 roomleft = IBSIZE;
2768 }
2769 DEBUG5(("roomleft=%d, bytes_in_bp=%d, tp->t_rd_request=%d\n",
2770 roomleft, bytes_in_bp, tp->t_rd_request));
2771 /*
2772 * if there is a read pending before this data got
2773 * here move bytes according to the minimum of room
2774 * left in this buffer, bytes in the message and byte
2775 * count requested in the read. If there is no read
2776 * pending, move the minimum of the first two
2777 */
2778 if (tp->t_rd_request == 0)
2779 bytes_to_move = MIN(roomleft, bytes_in_bp);
2780 else
2781 bytes_to_move =
2782 MIN(MIN(roomleft, bytes_in_bp), tp->t_rd_request);
2783 DEBUG5(("Bytes to move = %lu\n", bytes_to_move));
2784 if (bytes_to_move == 0)
2785 break;
2786 bcopy(rptr, bpt->b_wptr, bytes_to_move);
2787 bpt->b_wptr += bytes_to_move;
2788 rptr += bytes_to_move;
2789 tp->t_msglen += bytes_to_move;
2790 bytes_in_bp -= bytes_to_move;
2791 }
2792 if (bytes_in_bp == 0) {
2793 DEBUG4(("bytes_in_bp is zero\n"));
2794 freeb(bp);
2795 } else
2796 free_flag = 1; /* for debugging olny */
2797
2798 DEBUG4(("ldterm_do_noncanon: VMIN = %d, VTIME = %d, msglen = %d, \
2799 tid = %d\n", V_MIN, V_TIME, tp->t_msglen, tp->t_vtid));
2800 /*
2801 * If there is a pending read request at the stream head we
2802 * need to do VMIN/VTIME processing. The four possible cases
2803 * are:
2804 * MIN = 0, TIME > 0
2805 * MIN = >, TIME = 0
2806 * MIN > 0, TIME > 0
2807 * MIN = 0, TIME = 0
2808 * If we can satisfy VMIN, send it up, and start a new
2809 * timer if necessary. These four cases of VMIN/VTIME
2810 * are also dealt with in the write side put routine
2811 * when the M_READ is first seen.
2812 */
2813
2814 DEBUG4(("Incoming data while M_READ'ing\n"));
2815 /*
2816 * Case 1: Any data will satisfy the read, so send
2817 * it upstream.
2818 */
2819 if (V_MIN == 0 && V_TIME > 0) {
2820 if (tp->t_msglen)
2821 vmin_satisfied(q, tp, 1);
2822 else {
2823 /* EMPTY */
2824 DEBUG4(("ldterm_do_noncanon called, but no data!\n"));
2825 }
2826 /*
2827 * Case 2: This should never time out, so
2828 * until there's enough data, do nothing.
2829 */
2830 } else if (V_MIN > 0 && V_TIME == 0) {
2831 if (tp->t_msglen >= (int)V_MIN)
2832 vmin_satisfied(q, tp, 1);
2833
2834 /*
2835 * Case 3: If MIN is satisfied, send it up.
2836 * Also, remember to start a new timer *every*
2837 * time we see something if MIN isn't
2838 * safisfied
2839 */
2840 } else if (V_MIN > 0 && V_TIME > 0) {
2841 if (tp->t_msglen >= (int)V_MIN)
2842 vmin_satisfied(q, tp, 1);
2843 else
2844 vmin_settimer(q);
2845 /*
2846 * Case 4: Not possible. This request
2847 * should always be satisfied from the write
2848 * side, left here for debugging.
2849 */
2850 } else { /* V_MIN == 0 && V_TIME == 0 */
2851 vmin_satisfied(q, tp, 1);
2852 }
2853
2854 if (free_flag) {
2855 /* EMPTY */
2856 DEBUG4(("CAUTION message block not freed\n"));
2857 }
2858 return (newmsg(tp));
2859 }
2860
2861
2862 /*
2863 * Echo a typed byte to the terminal. Returns the number of bytes
2864 * printed. Bytes of EUC characters drop through the ECHOCTL stuff
2865 * and are just output as themselves.
2866 */
2867 static int
2868 ldterm_echo(uchar_t c, queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2869 {
2870 int i;
2871
2872 if (!(tp->t_modes.c_lflag & ECHO))
2873 return (0);
2874 i = 0;
2875
2876 /*
2877 * Echo control characters (c <= 37) only if the ECHOCTRL
2878 * flag is set as ^X.
2879 */
2880
2881 if ((tp->t_modes.c_lflag & ECHOCTL) &&
2882 (tp->t_modes.c_lflag & IEXTEN)) {
2883 if (c <= 037 && c != '\t' && c != '\n') {
2884 ldterm_outchar('^', q, ebsize, tp);
2885 i++;
2886 if (tp->t_modes.c_oflag & OLCUC)
2887 c += 'a' - 1;
2888 else
2889 c += 'A' - 1;
2890 } else if (c == 0177) {
2891 ldterm_outchar('^', q, ebsize, tp);
2892 i++;
2893 c = '?';
2894 }
2895 ldterm_outchar(c, q, ebsize, tp);
2896 return (i + 1);
2897 /* echo only special control character and the Bell */
2898 } else if ((c > 037 && c != 0177) || c == '\t' || c == '\n' ||
2899 c == '\r' || c == '\b' || c == 007 ||
2900 c == tp->t_modes.c_cc[VKILL]) {
2901 ldterm_outchar(c, q, ebsize, tp);
2902 return (i + 1);
2903 }
2904 return (i);
2905 }
2906
2907
2908 /*
2909 * Put a character on the output queue.
2910 */
2911 static void
2912 ldterm_outchar(uchar_t c, queue_t *q, size_t bsize, ldtermstd_state_t *tp)
2913 {
2914 mblk_t *curbp;
2915
2916 /*
2917 * Don't even look at the characters unless we have something
2918 * useful to do with them.
2919 */
2920 if ((tp->t_modes.c_oflag & OPOST) ||
2921 ((tp->t_modes.c_lflag & XCASE) &&
2922 (tp->t_modes.c_lflag & ICANON))) {
2923 mblk_t *mp;
2924
2925 if ((mp = allocb(4, BPRI_HI)) == NULL) {
2926 cmn_err(CE_WARN,
2927 "ldterm: (ldterm_outchar) out of blocks");
2928 return;
2929 }
2930 *mp->b_wptr++ = c;
2931 mp = ldterm_output_msg(q, mp, &tp->t_echomp, tp, bsize, 1);
2932 if (mp != NULL)
2933 freemsg(mp);
2934
2935 } else {
2936 if ((curbp = tp->t_echomp) != NULL) {
2937 while (curbp->b_cont != NULL)
2938 curbp = curbp->b_cont;
2939 if (curbp->b_datap->db_lim == curbp->b_wptr) {
2940 mblk_t *newbp;
2941
2942 if ((newbp = allocb(bsize, BPRI_HI)) == NULL) {
2943 cmn_err(CE_WARN,
2944 "ldterm_outchar: out of blocks");
2945 return;
2946 }
2947 curbp->b_cont = newbp;
2948 curbp = newbp;
2949 }
2950 } else {
2951 if ((curbp = allocb(bsize, BPRI_HI)) == NULL) {
2952 cmn_err(CE_WARN,
2953 "ldterm_outchar: out of blocks");
2954 return;
2955 }
2956 tp->t_echomp = curbp;
2957 }
2958 *curbp->b_wptr++ = c;
2959 }
2960 }
2961
2962
2963 /*
2964 * Copy a string, of length len, to the output queue.
2965 */
2966 static void
2967 ldterm_outstring(uchar_t *cp, int len, queue_t *q, size_t bsize,
2968 ldtermstd_state_t *tp)
2969 {
2970 while (len > 0) {
2971 ldterm_outchar(*cp++, q, bsize, tp);
2972 len--;
2973 }
2974 }
2975
2976
2977 static mblk_t *
2978 newmsg(ldtermstd_state_t *tp)
2979 {
2980 mblk_t *bp;
2981
2982 /*
2983 * If no current message, allocate a block for it.
2984 */
2985 if ((bp = tp->t_endmsg) == NULL) {
2986 if ((bp = allocb(IBSIZE, BPRI_MED)) == NULL) {
2987 cmn_err(CE_WARN,
2988 "ldterm: (ldtermrsrv/newmsg) out of blocks");
2989 return (bp);
2990 }
2991 tp->t_message = bp;
2992 tp->t_endmsg = bp;
2993 }
2994 return (bp);
2995 }
2996
2997
2998 static void
2999 ldterm_msg_upstream(queue_t *q, ldtermstd_state_t *tp)
3000 {
3001 ssize_t s;
3002 mblk_t *bp;
3003
3004 bp = tp->t_message;
3005 s = msgdsize(bp);
3006 if (bp)
3007 putnext(q, tp->t_message);
3008
3009 /*
3010 * update sysinfo canch character.
3011 */
3012 if (CANON_MODE)
3013 (void) drv_setparm(SYSCANC, s);
3014 tp->t_message = NULL;
3015 tp->t_endmsg = NULL;
3016 tp->t_msglen = 0;
3017 tp->t_rocount = 0;
3018 tp->t_rd_request = 0;
3019 if (tp->t_state & TS_MEUC) {
3020 ASSERT(tp->t_eucp_mp);
3021 tp->t_eucp = tp->t_eucp_mp->b_rptr;
3022 /* can't reset everything, as we may have other input */
3023 }
3024 }
3025
3026
3027 /*
3028 * Re-enable the write-side service procedure. When an allocation
3029 * failure causes write-side processing to stall, we disable the
3030 * write side and arrange to call this function when allocation once
3031 * again becomes possible.
3032 */
3033 static void
3034 ldterm_wenable(void *addr)
3035 {
3036 queue_t *q = addr;
3037 ldtermstd_state_t *tp;
3038
3039 tp = (ldtermstd_state_t *)q->q_ptr;
3040 /*
3041 * The bufcall is no longer pending.
3042 */
3043 tp->t_wbufcid = 0;
3044 enableok(q);
3045 qenable(q);
3046 }
3047
3048
3049 /*
3050 * Line discipline output queue put procedure. Attempts to process
3051 * the message directly and send it on downstream, queueing it only
3052 * if there's already something pending or if its downstream neighbor
3053 * is clogged.
3054 */
3055 static int
3056 ldtermwput(queue_t *q, mblk_t *mp)
3057 {
3058 ldtermstd_state_t *tp;
3059 unsigned char type = mp->b_datap->db_type;
3060
3061 tp = (ldtermstd_state_t *)q->q_ptr;
3062
3063 /*
3064 * Always process priority messages, regardless of whether or
3065 * not our queue is nonempty.
3066 */
3067 if (type >= QPCTL) {
3068 switch (type) {
3069
3070 case M_FLUSH:
3071 /*
3072 * Get rid of it, see comment in
3073 * ldterm_dosig().
3074 */
3075 if ((tp->t_state & TS_FLUSHWAIT) &&
3076 (*mp->b_rptr == FLUSHW)) {
3077 tp->t_state &= ~TS_FLUSHWAIT;
3078 freemsg(mp);
3079 return (0);
3080 }
3081 /*
3082 * This is coming from above, so we only
3083 * handle the write queue here. If FLUSHR is
3084 * set, it will get turned around at the
3085 * driver, and the read procedure will see it
3086 * eventually.
3087 */
3088 if (*mp->b_rptr & FLUSHW) {
3089 if ((tp->t_state & TS_ISPTSTTY) &&
3090 (*mp->b_rptr & FLUSHBAND))
3091 flushband(q, *(mp->b_rptr + 1),
3092 FLUSHDATA);
3093 else
3094 flushq(q, FLUSHDATA);
3095 }
3096
3097 putnext(q, mp);
3098 /*
3099 * If a timed read is interrupted, there is
3100 * no way to cancel an existing M_READ
3101 * request. We kludge by allowing a flush to
3102 * do so.
3103 */
3104 if (tp->t_state & TS_MREAD)
3105 vmin_satisfied(RD(q), tp, 0);
3106 break;
3107
3108 case M_READ:
3109 DEBUG1(("ldtermwmsg:M_READ RECEIVED\n"));
3110 /*
3111 * Stream head needs data to satisfy timed
3112 * read. Has meaning only if ICANON flag is
3113 * off indicating raw mode
3114 */
3115
3116 DEBUG4((
3117 "M_READ: RAW_MODE=%d, CNT=%d, VMIN=%d, VTIME=%d\n",
3118 RAW_MODE, *(unsigned int *)mp->b_rptr, V_MIN,
3119 V_TIME));
3120
3121 tp->t_rd_request = *(unsigned int *)mp->b_rptr;
3122
3123 if (RAW_MODE) {
3124 if (newmsg(tp) != NULL) {
3125 /*
3126 * VMIN/VTIME processing...
3127 * The four possible cases are:
3128 * MIN = 0, TIME > 0
3129 * MIN = >, TIME = 0
3130 * MIN > 0, TIME > 0
3131 * MIN = 0, TIME = 0
3132 * These four conditions must be dealt
3133 * with on the read side as well in
3134 * ldterm_do_noncanon(). Set TS_MREAD
3135 * so that the read side will know
3136 * there is a pending read request
3137 * waiting at the stream head. If we
3138 * can satisfy MIN do it here, rather
3139 * than on the read side. If we can't,
3140 * start timers if necessary and let
3141 * the other side deal with it.
3142 *
3143 * We got another M_READ before the
3144 * pending one completed, cancel any
3145 * existing timeout.
3146 */
3147 if (tp->t_state & TS_MREAD) {
3148 vmin_satisfied(RD(q),
3149 tp, 0);
3150 }
3151 tp->t_state |= TS_MREAD;
3152 /*
3153 * Case 1: Any data will
3154 * satisfy read, otherwise
3155 * start timer
3156 */
3157 if (V_MIN == 0 && V_TIME > 0) {
3158 if (tp->t_msglen)
3159 vmin_satisfied(RD(q),
3160 tp, 1);
3161 else
3162 vmin_settimer(RD(q));
3163
3164 /*
3165 * Case 2: If we have enough
3166 * data, send up now.
3167 * Otherwise, the read side
3168 * should wait forever until MIN
3169 * is satisified.
3170 */
3171 } else if (V_MIN > 0 && V_TIME == 0) {
3172 if (tp->t_msglen >= (int)V_MIN)
3173 vmin_satisfied(RD(q),
3174 tp, 1);
3175
3176 /*
3177 * Case 3: If we can satisfy
3178 * the read, send it up. If we
3179 * don't have enough data, but
3180 * there is at least one char,
3181 * start a timer. Otherwise,
3182 * let the read side start
3183 * the timer.
3184 */
3185 } else if (V_MIN > 0 && V_TIME > 0) {
3186 if (tp->t_msglen >= (int)V_MIN)
3187 vmin_satisfied(RD(q),
3188 tp, 1);
3189 else if (tp->t_msglen)
3190 vmin_settimer(RD(q));
3191 /*
3192 * Case 4: Read returns
3193 * whatever data is available
3194 * or zero if none.
3195 */
3196 } else { /* V_MIN == 0 && V_TIME == 0 */
3197 vmin_satisfied(RD(q), tp, 1);
3198 }
3199
3200 } else /* should do bufcall, really! */
3201 cmn_err(CE_WARN,
3202 "ldtermwmsg: out of blocks");
3203 }
3204 /*
3205 * pass M_READ down
3206 */
3207 putnext(q, mp);
3208 break;
3209
3210 default:
3211 /* Pass it through unmolested. */
3212 putnext(q, mp);
3213 break;
3214 }
3215 return (0);
3216 }
3217 /*
3218 * If our queue is nonempty or there's a traffic jam
3219 * downstream, this message must get in line.
3220 */
3221 if (q->q_first != NULL || !bcanputnext(q, mp->b_band)) {
3222 /*
3223 * Exception: ioctls, except for those defined to
3224 * take effect after output has drained, should be
3225 * processed immediately.
3226 */
3227 if (type == M_IOCTL) {
3228 struct iocblk *iocp;
3229
3230 iocp = (struct iocblk *)mp->b_rptr;
3231 switch (iocp->ioc_cmd) {
3232
3233 /*
3234 * Queue these.
3235 */
3236 case TCSETSW:
3237 case TCSETSF:
3238 case TCSETAW:
3239 case TCSETAF:
3240 case TCSBRK:
3241 break;
3242
3243 /*
3244 * Handle all others immediately.
3245 */
3246 default:
3247 (void) ldtermwmsg(q, mp);
3248 return (0);
3249 }
3250 }
3251 (void) putq(q, mp);
3252 return (0);
3253 }
3254 /*
3255 * We can take the fast path through, by simply calling
3256 * ldtermwmsg to dispose of mp.
3257 */
3258 (void) ldtermwmsg(q, mp);
3259 return (0);
3260 }
3261
3262
3263 /*
3264 * Line discipline output queue service procedure.
3265 */
3266 static int
3267 ldtermwsrv(queue_t *q)
3268 {
3269 mblk_t *mp;
3270
3271 /*
3272 * We expect this loop to iterate at most once, but must be
3273 * prepared for more in case our upstream neighbor isn't
3274 * paying strict attention to what canput tells it.
3275 */
3276 while ((mp = getq(q)) != NULL) {
3277 /*
3278 * N.B.: ldtermwput has already handled high-priority
3279 * messages, so we don't have to worry about them
3280 * here. Hence, the putbq call is safe.
3281 */
3282 if (!bcanputnext(q, mp->b_band)) {
3283 (void) putbq(q, mp);
3284 break;
3285 }
3286 if (!ldtermwmsg(q, mp)) {
3287 /*
3288 * Couldn't handle the whole thing; give up
3289 * for now and wait to be rescheduled.
3290 */
3291 break;
3292 }
3293 }
3294 return (0);
3295 }
3296
3297
3298 /*
3299 * Process the write-side message denoted by mp. If mp can't be
3300 * processed completely (due to allocation failures), put the
3301 * residual unprocessed part on the front of the write queue, disable
3302 * the queue, and schedule a qbufcall to arrange to complete its
3303 * processing later.
3304 *
3305 * Return 1 if the message was processed completely and 0 if not.
3306 *
3307 * This routine is called from both ldtermwput and ldtermwsrv to do the
3308 * actual work of dealing with mp. ldtermwput will have already
3309 * dealt with high priority messages.
3310 */
3311 static int
3312 ldtermwmsg(queue_t *q, mblk_t *mp)
3313 {
3314 ldtermstd_state_t *tp;
3315 mblk_t *residmp = NULL;
3316 size_t size;
3317
3318 tp = (ldtermstd_state_t *)q->q_ptr;
3319
3320 switch (mp->b_datap->db_type) {
3321
3322 case M_IOCTL:
3323 ldterm_do_ioctl(q, mp);
3324 break;
3325
3326 case M_DATA:
3327 {
3328 mblk_t *omp = NULL;
3329
3330 if ((tp->t_modes.c_lflag & FLUSHO) &&
3331 (tp->t_modes.c_lflag & IEXTEN)) {
3332 freemsg(mp); /* drop on floor */
3333 break;
3334 }
3335 tp->t_rocount = 0;
3336 /*
3337 * Don't even look at the characters unless
3338 * we have something useful to do with them.
3339 */
3340 if (((tp->t_modes.c_oflag & OPOST) ||
3341 ((tp->t_modes.c_lflag & XCASE) &&
3342 (tp->t_modes.c_lflag & ICANON))) &&
3343 (msgdsize(mp) || !(tp->t_state & TS_ISPTSTTY))) {
3344 unsigned char band = mp->b_band;
3345 short flag = mp->b_flag;
3346
3347 residmp = ldterm_output_msg(q, mp, &omp,
3348 tp, OBSIZE, 0);
3349 if ((mp = omp) == NULL)
3350 break;
3351 mp->b_band |= band;
3352 mp->b_flag |= flag;
3353 }
3354 /* Update sysinfo outch */
3355 (void) drv_setparm(SYSOUTC, msgdsize(mp));
3356 putnext(q, mp);
3357 break;
3358 }
3359
3360 default:
3361 putnext(q, mp); /* pass it through unmolested */
3362 break;
3363 }
3364
3365 if (residmp == NULL)
3366 return (1);
3367
3368 /*
3369 * An allocation failure occurred that prevented the message
3370 * from being completely processed. First, disable our
3371 * queue, since it's pointless to attempt further processing
3372 * until the allocation situation is resolved. (This must
3373 * precede the putbq call below, which would otherwise mark
3374 * the queue to be serviced.)
3375 */
3376 noenable(q);
3377 /*
3378 * Stuff the remnant on our write queue so that we can
3379 * complete it later when times become less lean. Note that
3380 * this sets QFULL, so that our upstream neighbor will be
3381 * blocked by flow control.
3382 */
3383 (void) putbq(q, residmp);
3384 /*
3385 * Schedule a qbufcall to re-enable the queue. The failure
3386 * won't have been for an allocation of more than OBSIZE
3387 * bytes, so don't ask for more than that from bufcall.
3388 */
3389 size = msgdsize(residmp);
3390 if (size > OBSIZE)
3391 size = OBSIZE;
3392 if (tp->t_wbufcid)
3393 qunbufcall(q, tp->t_wbufcid);
3394 tp->t_wbufcid = qbufcall(q, size, BPRI_MED, ldterm_wenable, q);
3395
3396 return (0);
3397 }
3398
3399
3400 /*
3401 * Perform output processing on a message, accumulating the output
3402 * characters in a new message.
3403 */
3404 static mblk_t *
3405 ldterm_output_msg(queue_t *q, mblk_t *imp, mblk_t **omp,
3406 ldtermstd_state_t *tp, size_t bsize, int echoing)
3407 {
3408 mblk_t *ibp; /* block we're examining from input message */
3409 mblk_t *obp; /* block we're filling in output message */
3410 mblk_t *cbp; /* continuation block */
3411 mblk_t *oobp; /* old value of obp; valid if NEW_BLOCK fails */
3412 mblk_t **contpp; /* where to stuff ptr to newly-allocated blk */
3413 unsigned char c, n;
3414 int count, ctype;
3415 ssize_t bytes_left;
3416
3417 mblk_t *bp; /* block to stuff an M_DELAY message in */
3418
3419
3420 /*
3421 * Allocate a new block into which to put bytes. If we can't,
3422 * we just drop the rest of the message on the floor. If x is
3423 * non-zero, just fall thru; failure requires cleanup before
3424 * going out
3425 */
3426
3427 #define NEW_BLOCK(x) \
3428 { \
3429 oobp = obp; \
3430 if ((obp = allocb(bsize, BPRI_MED)) == NULL) { \
3431 if (x == 0) \
3432 goto outofbufs; \
3433 } else { \
3434 *contpp = obp; \
3435 contpp = &obp->b_cont; \
3436 bytes_left = obp->b_datap->db_lim - obp->b_wptr; \
3437 } \
3438 }
3439
3440 ibp = imp;
3441
3442 /*
3443 * When we allocate the first block of a message, we should
3444 * stuff the pointer to it in "*omp". All subsequent blocks
3445 * should have the pointer to them stuffed into the "b_cont"
3446 * field of the previous block. "contpp" points to the place
3447 * where we should stuff the pointer.
3448 *
3449 * If we already have a message we're filling in, continue doing
3450 * so.
3451 */
3452 if ((obp = *omp) != NULL) {
3453 while (obp->b_cont != NULL)
3454 obp = obp->b_cont;
3455 contpp = &obp->b_cont;
3456 bytes_left = obp->b_datap->db_lim - obp->b_wptr;
3457 } else {
3458 contpp = omp;
3459 bytes_left = 0;
3460 }
3461
3462 do {
3463 while (ibp->b_rptr < ibp->b_wptr) {
3464 /*
3465 * Make sure there's room for one more
3466 * character. At most, we'll need "t_maxeuc"
3467 * bytes.
3468 */
3469 if ((bytes_left < (int)tp->t_maxeuc)) {
3470 /* LINTED */
3471 NEW_BLOCK(0);
3472 }
3473 /*
3474 * If doing XCASE processing (not very
3475 * likely, in this day and age), look at each
3476 * character individually.
3477 */
3478 if ((tp->t_modes.c_lflag & XCASE) &&
3479 (tp->t_modes.c_lflag & ICANON)) {
3480 c = *ibp->b_rptr++;
3481
3482 /*
3483 * We need to make sure that this is not
3484 * a following byte of a multibyte character
3485 * before applying an XCASE processing.
3486 *
3487 * tp->t_eucign will be 0 if and only
3488 * if the current 'c' is an ASCII character
3489 * and also a byte. Otherwise, it will have
3490 * the byte length of a multibyte character.
3491 */
3492 if ((tp->t_state & TS_MEUC) &&
3493 tp->t_eucign == 0 && NOTASCII(c)) {
3494 tp->t_eucign =
3495 tp->t_csmethods.ldterm_memwidth(
3496 c, (void *)tp);
3497 tp->t_scratch_len = tp->t_eucign;
3498
3499 if (tp->t_csdata.codeset_type !=
3500 LDTERM_CS_TYPE_UTF8) {
3501 tp->t_col +=
3502 tp->
3503 t_csmethods.
3504 ldterm_dispwidth(c,
3505 (void *)tp,
3506 tp->t_modes.c_lflag &
3507 ECHOCTL);
3508 }
3509 }
3510
3511 /*
3512 * If character is mapped on output,
3513 * put out a backslash followed by
3514 * what it is mapped to.
3515 */
3516 if (tp->t_eucign == 0 && omaptab[c] != 0 &&
3517 (!echoing || c != '\\')) {
3518 /* backslash is an ordinary character */
3519 tp->t_col++;
3520 *obp->b_wptr++ = '\\';
3521 bytes_left--;
3522 if (bytes_left == 0) {
3523 /* LINTED */
3524 NEW_BLOCK(1);
3525 }
3526 /*
3527 * Allocation failed, make
3528 * state consistent before
3529 * returning
3530 */
3531 if (obp == NULL) {
3532 ibp->b_rptr--;
3533 tp->t_col--;
3534 oobp->b_wptr--;
3535 goto outofbufs;
3536 }
3537 c = omaptab[c];
3538 }
3539 /*
3540 * If no other output processing is
3541 * required, push the character into
3542 * the block and get another.
3543 */
3544 if (!(tp->t_modes.c_oflag & OPOST)) {
3545 if (tp->t_eucign > 0) {
3546 --tp->t_eucign;
3547 } else {
3548 tp->t_col++;
3549 }
3550 *obp->b_wptr++ = c;
3551 bytes_left--;
3552 continue;
3553 }
3554 /*
3555 * OPOST output flag is set. Map
3556 * lower case to upper case if OLCUC
3557 * flag is set and the 'c' is a lowercase
3558 * ASCII character.
3559 */
3560 if (tp->t_eucign == 0 &&
3561 (tp->t_modes.c_oflag & OLCUC) &&
3562 c >= 'a' && c <= 'z')
3563 c -= 'a' - 'A';
3564 } else {
3565 /*
3566 * Copy all the ORDINARY characters,
3567 * possibly mapping upper case to
3568 * lower case. We use "movtuc",
3569 * STOPPING when we can't move some
3570 * character. For multi-byte or
3571 * multi-column EUC, we can't depend
3572 * on the regular tables. Rather than
3573 * just drop through to the "big
3574 * switch" for all characters, it
3575 * _might_ be faster to let "movtuc"
3576 * move a bunch of characters.
3577 * Chances are, even in multi-byte
3578 * mode we'll have lots of ASCII
3579 * going through. We check the flag
3580 * once, and call movtuc with the
3581 * appropriate table as an argument.
3582 *
3583 * "movtuc will work for all codeset
3584 * types since it stops at the beginning
3585 * byte of a multibyte character.
3586 */
3587 size_t bytes_to_move;
3588 size_t bytes_moved;
3589
3590 ASSERT(ibp->b_wptr >= ibp->b_rptr);
3591 bytes_to_move = ibp->b_wptr - ibp->b_rptr;
3592 if (bytes_to_move > bytes_left)
3593 bytes_to_move = bytes_left;
3594 if (tp->t_state & TS_MEUC) {
3595 bytes_moved = movtuc(bytes_to_move,
3596 ibp->b_rptr, obp->b_wptr,
3597 (tp->t_modes.c_oflag & OLCUC ?
3598 elcuctab : enotrantab));
3599 } else {
3600 bytes_moved = movtuc(bytes_to_move,
3601 ibp->b_rptr, obp->b_wptr,
3602 (tp->t_modes.c_oflag & OLCUC ?
3603 lcuctab : notrantab));
3604 }
3605 /*
3606 * We're save to just do this column
3607 * calculation, because if TS_MEUC is
3608 * set, we used the proper EUC
3609 * tables, and won't have copied any
3610 * EUC bytes.
3611 */
3612 tp->t_col += bytes_moved;
3613 ibp->b_rptr += bytes_moved;
3614 obp->b_wptr += bytes_moved;
3615 bytes_left -= bytes_moved;
3616 if (ibp->b_rptr >= ibp->b_wptr)
3617 continue; /* moved all of block */
3618 if (bytes_left == 0) {
3619 /* LINTED */
3620 NEW_BLOCK(0);
3621 }
3622 c = *ibp->b_rptr++; /* stopper */
3623 }
3624
3625 /*
3626 * Again, we need to make sure that this is not
3627 * a following byte of a multibyte character at
3628 * here.
3629 *
3630 * 'tp->t_eucign' will be 0 iff the current 'c' is
3631 * an ASCII character. Otherwise, it will have
3632 * the byte length of a multibyte character.
3633 * We also add the display width to 'tp->t_col' if
3634 * the current codeset is not UTF-8 since this is
3635 * a leading byte of a multibyte character.
3636 * For UTF-8 codeset type, we add the display width
3637 * when we get the last byte of a character.
3638 */
3639 if ((tp->t_state & TS_MEUC) && tp->t_eucign == 0 &&
3640 NOTASCII(c)) {
3641 tp->t_eucign = tp->t_csmethods.ldterm_memwidth(
3642 c, (void *)tp);
3643 tp->t_scratch_len = tp->t_eucign;
3644
3645 if (tp->t_csdata.codeset_type !=
3646 LDTERM_CS_TYPE_UTF8) {
3647 tp->t_col +=
3648 tp->t_csmethods.ldterm_dispwidth(c,
3649 (void *)tp,
3650 tp->t_modes.c_lflag & ECHOCTL);
3651 }
3652 }
3653
3654 /*
3655 * If the driver has requested, don't process
3656 * output flags. However, if we're in
3657 * multi-byte mode, we HAVE to look at
3658 * EVERYTHING going out to maintain column
3659 * position properly. Therefore IF the driver
3660 * says don't AND we're not doing multi-byte,
3661 * then don't do it. Otherwise, do it.
3662 *
3663 * NOTE: Hardware USUALLY doesn't expand tabs
3664 * properly for multi-byte situations anyway;
3665 * that's a known problem with the 3B2
3666 * "PORTS" board firmware, and any other
3667 * hardware that doesn't ACTUALLY know about
3668 * the current EUC mapping that WE are using
3669 * at this very moment. The problem is that
3670 * memory width is INDEPENDENT of screen
3671 * width - no relation - so WE know how wide
3672 * the characters are, but an off-the-host
3673 * board probably doesn't. So, until we're
3674 * SURE that the hardware below us can
3675 * correctly expand tabs in a
3676 * multi-byte/multi-column EUC situation, we
3677 * do it ourselves.
3678 */
3679 /*
3680 * Map <CR>to<NL> on output if OCRNL flag
3681 * set. ONLCR processing is not done if OCRNL
3682 * is set.
3683 */
3684 if (c == '\r' && (tp->t_modes.c_oflag & OCRNL)) {
3685 c = '\n';
3686 ctype = typetab[c];
3687 goto jocrnl;
3688 }
3689
3690 if (tp->t_csdata.codeset_type == LDTERM_CS_TYPE_EUC) {
3691 ctype = typetab[c];
3692 } else {
3693 /*
3694 * In other codeset types, we safely assume
3695 * any byte of a multibyte character will have
3696 * 'ORDINARY' type. For ASCII characters, we
3697 * still use the typetab[].
3698 */
3699 if (tp->t_eucign == 0)
3700 ctype = typetab[c];
3701 else
3702 ctype = ORDINARY;
3703 }
3704
3705 /*
3706 * Map <NL> to <CR><NL> on output if ONLCR
3707 * flag is set.
3708 */
3709 if (c == '\n' && (tp->t_modes.c_oflag & ONLCR)) {
3710 if (!(tp->t_state & TS_TTCR)) {
3711 tp->t_state |= TS_TTCR;
3712 c = '\r';
3713 ctype = typetab['\r'];
3714 --ibp->b_rptr;
3715 } else
3716 tp->t_state &= ~TS_TTCR;
3717 }
3718 /*
3719 * Delay values and column position
3720 * calculated here. For EUC chars in
3721 * multi-byte mode, we use "t_eucign" to help
3722 * calculate columns. When we see the first
3723 * byte of an EUC, we set t_eucign to the
3724 * number of bytes that will FOLLOW it, and
3725 * we add the screen width of the WHOLE EUC
3726 * character to the column position. In
3727 * particular, we can't count SS2 or SS3 as
3728 * printing characters. Remember, folks, the
3729 * screen width and memory width are
3730 * independent - no relation. We could have
3731 * dropped through for ASCII, but we want to
3732 * catch any bad characters (i.e., t_eucign
3733 * set and an ASCII char received) and
3734 * possibly report the garbage situation.
3735 */
3736 jocrnl:
3737
3738 count = 0;
3739 switch (ctype) {
3740
3741 case T_SS2:
3742 case T_SS3:
3743 case ORDINARY:
3744 if (tp->t_state & TS_MEUC) {
3745 if (tp->t_eucign) {
3746 *obp->b_wptr++ = c;
3747 bytes_left--;
3748
3749 tp->t_scratch[tp->t_scratch_len
3750 - tp->t_eucign] = c;
3751
3752 --tp->t_eucign;
3753
3754 if (tp->t_csdata.codeset_type
3755 == LDTERM_CS_TYPE_UTF8 &&
3756 tp->t_eucign <= 0) {
3757 tp->t_col +=
3758 ldterm_utf8_width(
3759 tp->t_scratch,
3760 tp->t_scratch_len);
3761 }
3762 } else {
3763 if (tp->t_modes.c_oflag & OLCUC)
3764 n = elcuctab[c];
3765 else
3766 n = enotrantab[c];
3767 if (n)
3768 c = n;
3769 tp->t_col++;
3770 *obp->b_wptr++ = c;
3771 bytes_left--;
3772 }
3773 } else { /* ho hum, ASCII mode... */
3774 if (tp->t_modes.c_oflag & OLCUC)
3775 n = lcuctab[c];
3776 else
3777 n = notrantab[c];
3778 if (n)
3779 c = n;
3780 tp->t_col++;
3781 *obp->b_wptr++ = c;
3782 bytes_left--;
3783 }
3784 break;
3785
3786 /*
3787 * If we're doing ECHOCTL, we've
3788 * already mapped the thing during
3789 * the process of canonising. Don't
3790 * bother here, as it's not one that
3791 * we did.
3792 */
3793 case CONTROL:
3794 *obp->b_wptr++ = c;
3795 bytes_left--;
3796 break;
3797
3798 /*
3799 * This is probably a backspace
3800 * received, not one that we're
3801 * echoing. Let it go as a
3802 * single-column backspace.
3803 */
3804 case BACKSPACE:
3805 if (tp->t_col)
3806 tp->t_col--;
3807 if (tp->t_modes.c_oflag & BSDLY) {
3808 if (tp->t_modes.c_oflag & OFILL)
3809 count = 1;
3810 }
3811 *obp->b_wptr++ = c;
3812 bytes_left--;
3813 break;
3814
3815 case NEWLINE:
3816 if (tp->t_modes.c_oflag & ONLRET)
3817 goto cr;
3818 if ((tp->t_modes.c_oflag & NLDLY) == NL1)
3819 count = 2;
3820 *obp->b_wptr++ = c;
3821 bytes_left--;
3822 break;
3823
3824 case TAB:
3825 /*
3826 * Map '\t' to spaces if XTABS flag
3827 * is set. The calculation of
3828 * "t_eucign" has probably insured
3829 * that column will be correct, as we
3830 * bumped t_col by the DISP width,
3831 * not the memory width.
3832 */
3833 if ((tp->t_modes.c_oflag & TABDLY) == XTABS) {
3834 for (;;) {
3835 *obp->b_wptr++ = ' ';
3836 bytes_left--;
3837 tp->t_col++;
3838 if ((tp->t_col & 07) == 0)
3839 break; /* every 8th */
3840 /*
3841 * If we don't have
3842 * room to fully
3843 * expand this tab in
3844 * this block, back
3845 * up to continue
3846 * expanding it into
3847 * the next block.
3848 */
3849 if (obp->b_wptr >=
3850 obp->b_datap->db_lim) {
3851 ibp->b_rptr--;
3852 break;
3853 }
3854 }
3855 } else {
3856 tp->t_col |= 07;
3857 tp->t_col++;
3858 if (tp->t_modes.c_oflag & OFILL) {
3859 if (tp->t_modes.c_oflag &
3860 TABDLY)
3861 count = 2;
3862 } else {
3863 switch (tp->t_modes.c_oflag &
3864 TABDLY) {
3865 case TAB2:
3866 count = 6;
3867 break;
3868
3869 case TAB1:
3870 count = 1 + (tp->t_col |
3871 ~07);
3872 if (count < 5)
3873 count = 0;
3874 break;
3875 }
3876 }
3877 *obp->b_wptr++ = c;
3878 bytes_left--;
3879 }
3880 break;
3881
3882 case VTAB:
3883 if ((tp->t_modes.c_oflag & VTDLY) &&
3884 !(tp->t_modes.c_oflag & OFILL))
3885 count = 127;
3886 *obp->b_wptr++ = c;
3887 bytes_left--;
3888 break;
3889
3890 case RETURN:
3891 /*
3892 * Ignore <CR> in column 0 if ONOCR
3893 * flag set.
3894 */
3895 if (tp->t_col == 0 &&
3896 (tp->t_modes.c_oflag & ONOCR))
3897 break;
3898
3899 cr:
3900 switch (tp->t_modes.c_oflag & CRDLY) {
3901
3902 case CR1:
3903 if (tp->t_modes.c_oflag & OFILL)
3904 count = 2;
3905 else
3906 count = tp->t_col % 2;
3907 break;
3908
3909 case CR2:
3910 if (tp->t_modes.c_oflag & OFILL)
3911 count = 4;
3912 else
3913 count = 6;
3914 break;
3915
3916 case CR3:
3917 if (tp->t_modes.c_oflag & OFILL)
3918 count = 0;
3919 else
3920 count = 9;
3921 break;
3922 }
3923 tp->t_col = 0;
3924 *obp->b_wptr++ = c;
3925 bytes_left--;
3926 break;
3927 }
3928
3929 if (count != 0) {
3930 if (tp->t_modes.c_oflag & OFILL) {
3931 do {
3932 if (bytes_left == 0) {
3933 /* LINTED */
3934 NEW_BLOCK(0);
3935 }
3936 if (tp->t_modes.c_oflag & OFDEL)
3937 *obp->b_wptr++ = CDEL;
3938 else
3939 *obp->b_wptr++ = CNUL;
3940 bytes_left--;
3941 } while (--count != 0);
3942 } else {
3943 if ((tp->t_modes.c_lflag & FLUSHO) &&
3944 (tp->t_modes.c_lflag & IEXTEN)) {
3945 /* drop on floor */
3946 freemsg(*omp);
3947 } else {
3948 /*
3949 * Update sysinfo
3950 * outch
3951 */
3952 (void) drv_setparm(SYSOUTC,
3953 msgdsize(*omp));
3954 putnext(q, *omp);
3955 /*
3956 * Send M_DELAY
3957 * downstream
3958 */
3959 if ((bp =
3960 allocb(1, BPRI_MED)) !=
3961 NULL) {
3962 bp->b_datap->db_type =
3963 M_DELAY;
3964 *bp->b_wptr++ =
3965 (uchar_t)count;
3966 putnext(q, bp);
3967 }
3968 }
3969 bytes_left = 0;
3970 /*
3971 * We have to start a new
3972 * message; the delay
3973 * introduces a break between
3974 * messages.
3975 */
3976 *omp = NULL;
3977 contpp = omp;
3978 }
3979 }
3980 }
3981 cbp = ibp->b_cont;
3982 freeb(ibp);
3983 } while ((ibp = cbp) != NULL); /* next block, if any */
3984
3985 outofbufs:
3986 return (ibp);
3987 #undef NEW_BLOCK
3988 }
3989
3990
3991 #if !defined(__sparc)
3992 int
3993 movtuc(size_t size, unsigned char *from, unsigned char *origto,
3994 unsigned char *table)
3995 {
3996 unsigned char *to = origto;
3997 unsigned char c;
3998
3999 while (size != 0 && (c = table[*from++]) != 0) {
4000 *to++ = c;
4001 size--;
4002 }
4003 return (to - origto);
4004 }
4005 #endif
4006
4007 static void
4008 ldterm_flush_output(uchar_t c, queue_t *q, ldtermstd_state_t *tp)
4009 {
4010 /* Already conditioned with IEXTEN during VDISCARD processing */
4011 if (tp->t_modes.c_lflag & FLUSHO)
4012 tp->t_modes.c_lflag &= ~FLUSHO;
4013 else {
4014 flushq(q, FLUSHDATA); /* flush our write queue */
4015 /* flush ones below us */
4016 (void) putnextctl1(q, M_FLUSH, FLUSHW);
4017 if ((tp->t_echomp = allocb(EBSIZE, BPRI_HI)) != NULL) {
4018 (void) ldterm_echo(c, q, 1, tp);
4019 if (tp->t_msglen != 0)
4020 ldterm_reprint(q, EBSIZE, tp);
4021 if (tp->t_echomp != NULL) {
4022 putnext(q, tp->t_echomp);
4023 tp->t_echomp = NULL;
4024 }
4025 }
4026 tp->t_modes.c_lflag |= FLUSHO;
4027 }
4028 }
4029
4030
4031 /*
4032 * Signal generated by the reader: M_PCSIG and M_FLUSH messages sent.
4033 */
4034 static void
4035 ldterm_dosig(queue_t *q, int sig, uchar_t c, int mtype, int mode)
4036 {
4037 ldtermstd_state_t *tp = (ldtermstd_state_t *)q->q_ptr;
4038 int sndsig = 0;
4039
4040 /*
4041 * c == \0 is brk case; need to flush on BRKINT even if
4042 * noflsh is set.
4043 */
4044 if ((!(tp->t_modes.c_lflag & NOFLSH)) || (c == '\0')) {
4045 if (mode) {
4046 if (tp->t_state & TS_TTSTOP) {
4047 sndsig = 1;
4048 (void) putnextctl1(q, mtype, sig);
4049 }
4050 /*
4051 * Flush read or write side.
4052 * Restart the input or output.
4053 */
4054 if (mode & FLUSHR) {
4055 flushq(q, FLUSHDATA);
4056 (void) putnextctl1(WR(q), M_FLUSH, mode);
4057 if (tp->t_state & (TS_TBLOCK|TS_IFBLOCK)) {
4058 (void) putnextctl(WR(q), M_STARTI);
4059 tp->t_state &= ~(TS_TBLOCK|TS_IFBLOCK);
4060 }
4061 }
4062 if (mode & FLUSHW) {
4063 flushq(WR(q), FLUSHDATA);
4064 /*
4065 * XXX This is extremely gross.
4066 * Since we can't be sure our M_FLUSH
4067 * will have run its course by the
4068 * time we do the echo below, we set
4069 * state and toss it in the write put
4070 * routine to prevent flushing our
4071 * own data. Note that downstream
4072 * modules on the write side will be
4073 * flushed by the M_FLUSH sent above.
4074 */
4075 tp->t_state |= TS_FLUSHWAIT;
4076 (void) putnextctl1(q, M_FLUSH, FLUSHW);
4077 if (tp->t_state & TS_TTSTOP) {
4078 (void) putnextctl(WR(q), M_START);
4079 tp->t_state &= ~(TS_TTSTOP|TS_OFBLOCK);
4080 }
4081 }
4082 }
4083 }
4084 tp->t_state &= ~TS_QUOT;
4085 if (sndsig == 0)
4086 (void) putnextctl1(q, mtype, sig);
4087
4088 if (c != '\0') {
4089 if ((tp->t_echomp = allocb(4, BPRI_HI)) != NULL) {
4090 if (ldterm_echo(c, WR(q), 4, tp) > 0)
4091 putnext(WR(q), tp->t_echomp);
4092 else
4093 freemsg(tp->t_echomp);
4094 tp->t_echomp = NULL;
4095 }
4096 }
4097 }
4098
4099
4100 /*
4101 * Called when an M_IOCTL message is seen on the write queue; does
4102 * whatever we're supposed to do with it, and either replies
4103 * immediately or passes it to the next module down.
4104 */
4105 static void
4106 ldterm_do_ioctl(queue_t *q, mblk_t *mp)
4107 {
4108 ldtermstd_state_t *tp;
4109 struct iocblk *iocp;
4110 struct eucioc *euciocp; /* needed for EUC ioctls */
4111 ldterm_cs_data_user_t *csdp;
4112 int i;
4113 int locale_name_sz;
4114 uchar_t maxbytelen;
4115 uchar_t maxscreenlen;
4116 int error;
4117
4118 iocp = (struct iocblk *)mp->b_rptr;
4119 tp = (ldtermstd_state_t *)q->q_ptr;
4120
4121 switch (iocp->ioc_cmd) {
4122
4123 case TCSETS:
4124 case TCSETSW:
4125 case TCSETSF:
4126 {
4127 /*
4128 * Set current parameters and special
4129 * characters.
4130 */
4131 struct termios *cb;
4132 struct termios oldmodes;
4133
4134 error = miocpullup(mp, sizeof (struct termios));
4135 if (error != 0) {
4136 miocnak(q, mp, 0, error);
4137 return;
4138 }
4139
4140 cb = (struct termios *)mp->b_cont->b_rptr;
4141
4142 oldmodes = tp->t_amodes;
4143 tp->t_amodes = *cb;
4144 if ((tp->t_amodes.c_lflag & PENDIN) &&
4145 (tp->t_modes.c_lflag & IEXTEN)) {
4146 /*
4147 * Yuk. The C shell file completion
4148 * code actually uses this "feature",
4149 * so we have to support it.
4150 */
4151 if (tp->t_message != NULL) {
4152 tp->t_state |= TS_RESCAN;
4153 qenable(RD(q));
4154 }
4155 tp->t_amodes.c_lflag &= ~PENDIN;
4156 }
4157 bcopy(tp->t_amodes.c_cc, tp->t_modes.c_cc, NCCS);
4158
4159 /*
4160 * ldterm_adjust_modes does not deal with
4161 * cflags
4162 */
4163 tp->t_modes.c_cflag = tp->t_amodes.c_cflag;
4164
4165 ldterm_adjust_modes(tp);
4166 if (chgstropts(&oldmodes, tp, RD(q)) == (-1)) {
4167 miocnak(q, mp, 0, EAGAIN);
4168 return;
4169 }
4170 /*
4171 * The driver may want to know about the
4172 * following iflags: IGNBRK, BRKINT, IGNPAR,
4173 * PARMRK, INPCK, IXON, IXANY.
4174 */
4175 break;
4176 }
4177
4178 case TCSETA:
4179 case TCSETAW:
4180 case TCSETAF:
4181 {
4182 /*
4183 * Old-style "ioctl" to set current
4184 * parameters and special characters. Don't
4185 * clear out the unset portions, leave them
4186 * as they are.
4187 */
4188 struct termio *cb;
4189 struct termios oldmodes;
4190
4191 error = miocpullup(mp, sizeof (struct termio));
4192 if (error != 0) {
4193 miocnak(q, mp, 0, error);
4194 return;
4195 }
4196
4197 cb = (struct termio *)mp->b_cont->b_rptr;
4198
4199 oldmodes = tp->t_amodes;
4200 tp->t_amodes.c_iflag =
4201 (tp->t_amodes.c_iflag & 0xffff0000 | cb->c_iflag);
4202 tp->t_amodes.c_oflag =
4203 (tp->t_amodes.c_oflag & 0xffff0000 | cb->c_oflag);
4204 tp->t_amodes.c_cflag =
4205 (tp->t_amodes.c_cflag & 0xffff0000 | cb->c_cflag);
4206 tp->t_amodes.c_lflag =
4207 (tp->t_amodes.c_lflag & 0xffff0000 | cb->c_lflag);
4208
4209 bcopy(cb->c_cc, tp->t_modes.c_cc, NCC);
4210 /* TCGETS returns amodes, so update that too */
4211 bcopy(cb->c_cc, tp->t_amodes.c_cc, NCC);
4212
4213 /* ldterm_adjust_modes does not deal with cflags */
4214
4215 tp->t_modes.c_cflag = tp->t_amodes.c_cflag;
4216
4217 ldterm_adjust_modes(tp);
4218 if (chgstropts(&oldmodes, tp, RD(q)) == (-1)) {
4219 miocnak(q, mp, 0, EAGAIN);
4220 return;
4221 }
4222 /*
4223 * The driver may want to know about the
4224 * following iflags: IGNBRK, BRKINT, IGNPAR,
4225 * PARMRK, INPCK, IXON, IXANY.
4226 */
4227 break;
4228 }
4229
4230 case TCFLSH:
4231 /*
4232 * Do the flush on the write queue immediately, and
4233 * queue up any flush on the read queue for the
4234 * service procedure to see. Then turn it into the
4235 * appropriate M_FLUSH message, so that the module
4236 * below us doesn't have to know about TCFLSH.
4237 */
4238 error = miocpullup(mp, sizeof (int));
4239 if (error != 0) {
4240 miocnak(q, mp, 0, error);
4241 return;
4242 }
4243
4244 ASSERT(mp->b_datap != NULL);
4245 if (*(int *)mp->b_cont->b_rptr == 0) {
4246 ASSERT(mp->b_datap != NULL);
4247 (void) putnextctl1(q, M_FLUSH, FLUSHR);
4248 (void) putctl1(RD(q), M_FLUSH, FLUSHR);
4249 } else if (*(int *)mp->b_cont->b_rptr == 1) {
4250 flushq(q, FLUSHDATA);
4251 ASSERT(mp->b_datap != NULL);
4252 tp->t_state |= TS_FLUSHWAIT;
4253 (void) putnextctl1(RD(q), M_FLUSH, FLUSHW);
4254 (void) putnextctl1(q, M_FLUSH, FLUSHW);
4255 } else if (*(int *)mp->b_cont->b_rptr == 2) {
4256 flushq(q, FLUSHDATA);
4257 ASSERT(mp->b_datap != NULL);
4258 (void) putnextctl1(q, M_FLUSH, FLUSHRW);
4259 tp->t_state |= TS_FLUSHWAIT;
4260 (void) putnextctl1(RD(q), M_FLUSH, FLUSHRW);
4261 } else {
4262 miocnak(q, mp, 0, EINVAL);
4263 return;
4264 }
4265 ASSERT(mp->b_datap != NULL);
4266 iocp->ioc_rval = 0;
4267 miocack(q, mp, 0, 0);
4268 return;
4269
4270 case TCXONC:
4271 error = miocpullup(mp, sizeof (int));
4272 if (error != 0) {
4273 miocnak(q, mp, 0, error);
4274 return;
4275 }
4276
4277 switch (*(int *)mp->b_cont->b_rptr) {
4278 case 0:
4279 if (!(tp->t_state & TS_TTSTOP)) {
4280 (void) putnextctl(q, M_STOP);
4281 tp->t_state |= (TS_TTSTOP|TS_OFBLOCK);
4282 }
4283 break;
4284
4285 case 1:
4286 if (tp->t_state & TS_TTSTOP) {
4287 (void) putnextctl(q, M_START);
4288 tp->t_state &= ~(TS_TTSTOP|TS_OFBLOCK);
4289 }
4290 break;
4291
4292 case 2:
4293 (void) putnextctl(q, M_STOPI);
4294 tp->t_state |= (TS_TBLOCK|TS_IFBLOCK);
4295 break;
4296
4297 case 3:
4298 (void) putnextctl(q, M_STARTI);
4299 tp->t_state &= ~(TS_TBLOCK|TS_IFBLOCK);
4300 break;
4301
4302 default:
4303 miocnak(q, mp, 0, EINVAL);
4304 return;
4305 }
4306 ASSERT(mp->b_datap != NULL);
4307 iocp->ioc_rval = 0;
4308 miocack(q, mp, 0, 0);
4309 return;
4310 /*
4311 * TCSBRK is expected to be handled by the driver.
4312 * The reason its left for the driver is that when
4313 * the argument to TCSBRK is zero driver has to drain
4314 * the data and sending a M_IOCACK from LDTERM before
4315 * the driver drains the data is going to cause
4316 * problems.
4317 */
4318
4319 /*
4320 * The following are EUC related ioctls. For
4321 * EUC_WSET, we have to pass the information on, even
4322 * though we ACK the call. It's vital in the EUC
4323 * environment that everybody downstream knows about
4324 * the EUC codeset widths currently in use; we
4325 * therefore pass down the information in an M_CTL
4326 * message. It will bottom out in the driver.
4327 */
4328 case EUC_WSET:
4329 {
4330
4331 /* only needed for EUC_WSET */
4332 struct iocblk *riocp;
4333
4334 mblk_t *dmp, *dmp_cont;
4335
4336 /*
4337 * If the user didn't supply any information,
4338 * NAK it.
4339 */
4340 error = miocpullup(mp, sizeof (struct eucioc));
4341 if (error != 0) {
4342 miocnak(q, mp, 0, error);
4343 return;
4344 }
4345
4346 euciocp = (struct eucioc *)mp->b_cont->b_rptr;
4347 /*
4348 * Check here for something reasonable. If
4349 * anything will take more than EUC_MAXW
4350 * columns or more than EUC_MAXW bytes
4351 * following SS2 or SS3, then just reject it
4352 * out of hand. It's not impossible for us to
4353 * do it, it just isn't reasonable. So far,
4354 * in the world, we've seen the absolute max
4355 * columns to be 2 and the max number of
4356 * bytes to be 3. This allows room for some
4357 * expansion of that, but it probably won't
4358 * even be necessary. At the moment, we
4359 * return a "range" error. If you really
4360 * need to, you can push EUC_MAXW up to over
4361 * 200; it doesn't make sense, though, with
4362 * only a CANBSIZ sized input limit (usually
4363 * 256)!
4364 */
4365 for (i = 0; i < 4; i++) {
4366 if ((euciocp->eucw[i] > EUC_MAXW) ||
4367 (euciocp->scrw[i] > EUC_MAXW)) {
4368 miocnak(q, mp, 0, ERANGE);
4369 return;
4370 }
4371 }
4372 /*
4373 * Otherwise, save the information in tp,
4374 * force codeset 0 (ASCII) to be one byte,
4375 * one column.
4376 */
4377 cp_eucwioc(euciocp, &tp->eucwioc, EUCIN);
4378 tp->eucwioc.eucw[0] = tp->eucwioc.scrw[0] = 1;
4379 /*
4380 * Now, check out whether we're doing
4381 * multibyte processing. if we are, we need
4382 * to allocate a block to hold the parallel
4383 * array. By convention, we've been passed
4384 * what amounts to a CSWIDTH definition. We
4385 * actually NEED the number of bytes for
4386 * Codesets 2 & 3.
4387 */
4388 tp->t_maxeuc = 0; /* reset to say we're NOT */
4389
4390 tp->t_state &= ~TS_MEUC;
4391 /*
4392 * We'll set TS_MEUC if we're doing
4393 * multi-column OR multi- byte OR both. It
4394 * makes things easier... NOTE: If we fail
4395 * to get the buffer we need to hold display
4396 * widths, then DON'T let the TS_MEUC bit get
4397 * set!
4398 */
4399 for (i = 0; i < 4; i++) {
4400 if (tp->eucwioc.eucw[i] > tp->t_maxeuc)
4401 tp->t_maxeuc = tp->eucwioc.eucw[i];
4402 if (tp->eucwioc.scrw[i] > 1)
4403 tp->t_state |= TS_MEUC;
4404 }
4405 if ((tp->t_maxeuc > 1) || (tp->t_state & TS_MEUC)) {
4406 if (!tp->t_eucp_mp) {
4407 if ((tp->t_eucp_mp = allocb(_TTY_BUFSIZ,
4408 BPRI_HI)) == NULL) {
4409 tp->t_maxeuc = 1;
4410 tp->t_state &= ~TS_MEUC;
4411 cmn_err(CE_WARN,
4412 "Can't allocate eucp_mp");
4413 miocnak(q, mp, 0, ENOSR);
4414 return;
4415 }
4416 /*
4417 * here, if there's junk in
4418 * the canonical buffer, then
4419 * move the eucp pointer past
4420 * it, so we don't run off
4421 * the beginning. This is a
4422 * total botch, but will
4423 * hopefully keep stuff from
4424 * getting too messed up
4425 * until the user flushes
4426 * this line!
4427 */
4428 if (tp->t_msglen) {
4429 tp->t_eucp =
4430 tp->t_eucp_mp->b_rptr;
4431 for (i = tp->t_msglen; i; i--)
4432 *tp->t_eucp++ = 1;
4433 } else {
4434 tp->t_eucp =
4435 tp->t_eucp_mp->b_rptr;
4436 }
4437 }
4438 /* doing multi-byte handling */
4439 tp->t_state |= TS_MEUC;
4440
4441 } else if (tp->t_eucp_mp) {
4442 freemsg(tp->t_eucp_mp);
4443 tp->t_eucp_mp = NULL;
4444 tp->t_eucp = NULL;
4445 }
4446
4447 /*
4448 * Save the EUC width data we have at
4449 * the t_csdata, set t_csdata.codeset_type to
4450 * EUC one, and, switch the codeset methods at
4451 * t_csmethods.
4452 */
4453 bzero(&tp->t_csdata.eucpc_data,
4454 (sizeof (ldterm_eucpc_data_t) *
4455 LDTERM_CS_MAX_CODESETS));
4456 tp->t_csdata.eucpc_data[0].byte_length =
4457 tp->eucwioc.eucw[1];
4458 tp->t_csdata.eucpc_data[0].screen_width =
4459 tp->eucwioc.scrw[1];
4460 tp->t_csdata.eucpc_data[1].byte_length =
4461 tp->eucwioc.eucw[2];
4462 tp->t_csdata.eucpc_data[1].screen_width =
4463 tp->eucwioc.scrw[2];
4464 tp->t_csdata.eucpc_data[2].byte_length =
4465 tp->eucwioc.eucw[3];
4466 tp->t_csdata.eucpc_data[2].screen_width =
4467 tp->eucwioc.scrw[3];
4468 tp->t_csdata.version = LDTERM_DATA_VERSION;
4469 tp->t_csdata.codeset_type = LDTERM_CS_TYPE_EUC;
4470 /*
4471 * We are not using the 'csinfo_num' anyway if the
4472 * current codeset type is EUC. So, set it to
4473 * the maximum possible.
4474 */
4475 tp->t_csdata.csinfo_num =
4476 LDTERM_CS_TYPE_EUC_MAX_SUBCS;
4477 if (tp->t_csdata.locale_name != (char *)NULL) {
4478 kmem_free(tp->t_csdata.locale_name,
4479 strlen(tp->t_csdata.locale_name) + 1);
4480 tp->t_csdata.locale_name = (char *)NULL;
4481 }
4482 tp->t_csmethods = cs_methods[LDTERM_CS_TYPE_EUC];
4483
4484 /*
4485 * If we are able to allocate two blocks (the
4486 * iocblk and the associated data), then pass
4487 * it downstream, otherwise we'll need to NAK
4488 * it, and drop whatever we WERE able to
4489 * allocate.
4490 */
4491 if ((dmp = mkiocb(EUC_WSET)) == NULL) {
4492 miocnak(q, mp, 0, ENOSR);
4493 return;
4494 }
4495 if ((dmp_cont = allocb(EUCSIZE, BPRI_HI)) == NULL) {
4496 freemsg(dmp);
4497 miocnak(q, mp, 0, ENOSR);
4498 return;
4499 }
4500
4501 /*
4502 * We got both buffers. Copy out the EUC
4503 * information (as we received it, not what
4504 * we're using!) & pass it on.
4505 */
4506 bcopy(mp->b_cont->b_rptr, dmp_cont->b_rptr, EUCSIZE);
4507 dmp_cont->b_wptr += EUCSIZE;
4508 dmp->b_cont = dmp_cont;
4509 dmp->b_datap->db_type = M_CTL;
4510 dmp_cont->b_datap->db_type = M_DATA;
4511 riocp = (struct iocblk *)dmp->b_rptr;
4512 riocp->ioc_count = EUCSIZE;
4513 putnext(q, dmp);
4514
4515 /*
4516 * Now ACK the ioctl.
4517 */
4518 iocp->ioc_rval = 0;
4519 miocack(q, mp, 0, 0);
4520 return;
4521 }
4522
4523 case EUC_WGET:
4524 error = miocpullup(mp, sizeof (struct eucioc));
4525 if (error != 0) {
4526 miocnak(q, mp, 0, error);
4527 return;
4528 }
4529 euciocp = (struct eucioc *)mp->b_cont->b_rptr;
4530 cp_eucwioc(&tp->eucwioc, euciocp, EUCOUT);
4531 iocp->ioc_rval = 0;
4532 miocack(q, mp, EUCSIZE, 0);
4533 return;
4534
4535 case CSDATA_SET:
4536 error = miocpullup(mp, sizeof (ldterm_cs_data_user_t));
4537 if (error != 0) {
4538 miocnak(q, mp, 0, error);
4539 return;
4540 }
4541
4542 csdp = (ldterm_cs_data_user_t *)mp->b_cont->b_rptr;
4543
4544 /* Validate the codeset data provided. */
4545 if (csdp->version > LDTERM_DATA_VERSION ||
4546 csdp->codeset_type < LDTERM_CS_TYPE_MIN ||
4547 csdp->codeset_type > LDTERM_CS_TYPE_MAX) {
4548 miocnak(q, mp, 0, ERANGE);
4549 return;
4550 }
4551
4552 if ((csdp->codeset_type == LDTERM_CS_TYPE_EUC &&
4553 csdp->csinfo_num > LDTERM_CS_TYPE_EUC_MAX_SUBCS) ||
4554 (csdp->codeset_type == LDTERM_CS_TYPE_PCCS &&
4555 (csdp->csinfo_num < LDTERM_CS_TYPE_PCCS_MIN_SUBCS ||
4556 csdp->csinfo_num > LDTERM_CS_TYPE_PCCS_MAX_SUBCS))) {
4557 miocnak(q, mp, 0, ERANGE);
4558 return;
4559 }
4560
4561 maxbytelen = maxscreenlen = 0;
4562 if (csdp->codeset_type == LDTERM_CS_TYPE_EUC) {
4563 for (i = 0; i < LDTERM_CS_TYPE_EUC_MAX_SUBCS; i++) {
4564 if (csdp->eucpc_data[i].byte_length >
4565 EUC_MAXW ||
4566 csdp->eucpc_data[i].screen_width >
4567 EUC_MAXW) {
4568 miocnak(q, mp, 0, ERANGE);
4569 return;
4570 }
4571
4572 if (csdp->eucpc_data[i].byte_length >
4573 maxbytelen)
4574 maxbytelen =
4575 csdp->eucpc_data[i].byte_length;
4576 if (csdp->eucpc_data[i].screen_width >
4577 maxscreenlen)
4578 maxscreenlen =
4579 csdp->eucpc_data[i].screen_width;
4580 }
4581 /* POSIX/C locale? */
4582 if (maxbytelen == 0 && maxscreenlen == 0)
4583 maxbytelen = maxscreenlen = 1;
4584 } else if (csdp->codeset_type == LDTERM_CS_TYPE_PCCS) {
4585 for (i = 0; i < LDTERM_CS_MAX_CODESETS; i++) {
4586 if (csdp->eucpc_data[i].byte_length >
4587 LDTERM_CS_MAX_BYTE_LENGTH) {
4588 miocnak(q, mp, 0, ERANGE);
4589 return;
4590 }
4591 if (csdp->eucpc_data[i].byte_length >
4592 maxbytelen)
4593 maxbytelen =
4594 csdp->eucpc_data[i].byte_length;
4595 if (csdp->eucpc_data[i].screen_width >
4596 maxscreenlen)
4597 maxscreenlen =
4598 csdp->eucpc_data[i].screen_width;
4599 }
4600 } else if (csdp->codeset_type == LDTERM_CS_TYPE_UTF8) {
4601 maxbytelen = 4;
4602 maxscreenlen = 2;
4603 }
4604
4605 locale_name_sz = 0;
4606
4607 for (i = 0; i < MAXNAMELEN; i++)
4608 if (csdp->locale_name[i] == '\0')
4609 break;
4610 /*
4611 * We cannot have any string that is not NULL byte
4612 * terminated.
4613 */
4614 if (i >= MAXNAMELEN) {
4615 miocnak(q, mp, 0, ERANGE);
4616 return;
4617 }
4618
4619 locale_name_sz = i + 1;
4620
4621 /*
4622 * As the final check, if there was invalid codeset_type
4623 * given, or invalid byte_length was specified, it's an error.
4624 */
4625 if (maxbytelen <= 0 || maxscreenlen <= 0) {
4626 miocnak(q, mp, 0, ERANGE);
4627 return;
4628 }
4629
4630 /* Do the switching. */
4631 tp->t_maxeuc = maxbytelen;
4632 tp->t_state &= ~TS_MEUC;
4633 if (maxbytelen > 1 || maxscreenlen > 1) {
4634 if (!tp->t_eucp_mp) {
4635 if (!(tp->t_eucp_mp = allocb(_TTY_BUFSIZ,
4636 BPRI_HI))) {
4637 cmn_err(CE_WARN,
4638 "Can't allocate eucp_mp");
4639 miocnak(q, mp, 0, ENOSR);
4640 return;
4641 }
4642 /*
4643 * If there's junk in the canonical buffer,
4644 * then move the eucp pointer past it,
4645 * so we don't run off the beginning. This is
4646 * a total botch, but will hopefully keep
4647 * stuff from getting too messed up until
4648 * the user flushes this line!
4649 */
4650 if (tp->t_msglen) {
4651 tp->t_eucp = tp->t_eucp_mp->b_rptr;
4652 for (i = tp->t_msglen; i; i--)
4653 *tp->t_eucp++ = 1;
4654 } else {
4655 tp->t_eucp = tp->t_eucp_mp->b_rptr;
4656 }
4657 }
4658
4659 /*
4660 * We only set TS_MEUC for a multibyte/multi-column
4661 * codeset.
4662 */
4663 tp->t_state |= TS_MEUC;
4664
4665 tp->t_csdata.version = csdp->version;
4666 tp->t_csdata.codeset_type = csdp->codeset_type;
4667 tp->t_csdata.csinfo_num = csdp->csinfo_num;
4668 bcopy(csdp->eucpc_data, tp->t_csdata.eucpc_data,
4669 sizeof (ldterm_eucpc_data_t) *
4670 LDTERM_CS_MAX_CODESETS);
4671 tp->t_csmethods = cs_methods[csdp->codeset_type];
4672
4673 if (csdp->codeset_type == LDTERM_CS_TYPE_EUC) {
4674 tp->eucwioc.eucw[0] = 1;
4675 tp->eucwioc.scrw[0] = 1;
4676
4677 tp->eucwioc.eucw[1] =
4678 csdp->eucpc_data[0].byte_length;
4679 tp->eucwioc.scrw[1] =
4680 csdp->eucpc_data[0].screen_width;
4681
4682 tp->eucwioc.eucw[2] =
4683 csdp->eucpc_data[1].byte_length + 1;
4684 tp->eucwioc.scrw[2] =
4685 csdp->eucpc_data[1].screen_width;
4686
4687 tp->eucwioc.eucw[3] =
4688 csdp->eucpc_data[2].byte_length + 1;
4689 tp->eucwioc.scrw[3] =
4690 csdp->eucpc_data[2].screen_width;
4691 } else {
4692 /*
4693 * We are not going to use this data
4694 * structure. So, clear it. Also, stty(1) will
4695 * make use of the cleared tp->eucwioc when
4696 * it prints out codeset width setting.
4697 */
4698 bzero(&tp->eucwioc, EUCSIZE);
4699 }
4700 } else {
4701 /*
4702 * If this codeset is a single byte codeset that
4703 * requires only single display column for all
4704 * characters, we switch to default EUC codeset
4705 * methods and data setting.
4706 */
4707
4708 if (tp->t_eucp_mp) {
4709 freemsg(tp->t_eucp_mp);
4710 tp->t_eucp_mp = NULL;
4711 tp->t_eucp = NULL;
4712 }
4713
4714 bzero(&tp->eucwioc, EUCSIZE);
4715 tp->eucwioc.eucw[0] = 1;
4716 tp->eucwioc.scrw[0] = 1;
4717 if (tp->t_csdata.locale_name != (char *)NULL) {
4718 kmem_free(tp->t_csdata.locale_name,
4719 strlen(tp->t_csdata.locale_name) + 1);
4720 }
4721 tp->t_csdata = default_cs_data;
4722 tp->t_csmethods = cs_methods[LDTERM_CS_TYPE_EUC];
4723 }
4724
4725 /* Copy over locale_name. */
4726 if (tp->t_csdata.locale_name != (char *)NULL) {
4727 kmem_free(tp->t_csdata.locale_name,
4728 strlen(tp->t_csdata.locale_name) + 1);
4729 }
4730 if (locale_name_sz > 1) {
4731 tp->t_csdata.locale_name = (char *)kmem_alloc(
4732 locale_name_sz, KM_SLEEP);
4733 (void) strcpy(tp->t_csdata.locale_name,
4734 csdp->locale_name);
4735 } else {
4736 tp->t_csdata.locale_name = (char *)NULL;
4737 }
4738
4739 /*
4740 * Now ACK the ioctl.
4741 */
4742 iocp->ioc_rval = 0;
4743 miocack(q, mp, 0, 0);
4744 return;
4745
4746 case CSDATA_GET:
4747 error = miocpullup(mp, sizeof (ldterm_cs_data_user_t));
4748 if (error != 0) {
4749 miocnak(q, mp, 0, error);
4750 return;
4751 }
4752
4753 csdp = (ldterm_cs_data_user_t *)mp->b_cont->b_rptr;
4754
4755 csdp->version = tp->t_csdata.version;
4756 csdp->codeset_type = tp->t_csdata.codeset_type;
4757 csdp->csinfo_num = tp->t_csdata.csinfo_num;
4758 csdp->pad = tp->t_csdata.pad;
4759 if (tp->t_csdata.locale_name) {
4760 (void) strcpy(csdp->locale_name,
4761 tp->t_csdata.locale_name);
4762 } else {
4763 csdp->locale_name[0] = '\0';
4764 }
4765 bcopy(tp->t_csdata.eucpc_data, csdp->eucpc_data,
4766 sizeof (ldterm_eucpc_data_t) * LDTERM_CS_MAX_CODESETS);
4767 /*
4768 * If the codeset is an EUC codeset and if it has 2nd and/or
4769 * 3rd supplementary codesets, we subtract one from each
4770 * byte length of the supplementary codesets. This is
4771 * because single shift characters, SS2 and SS3, are not
4772 * included in the byte lengths in the user space.
4773 */
4774 if (csdp->codeset_type == LDTERM_CS_TYPE_EUC) {
4775 if (csdp->eucpc_data[1].byte_length)
4776 csdp->eucpc_data[1].byte_length -= 1;
4777 if (csdp->eucpc_data[2].byte_length)
4778 csdp->eucpc_data[2].byte_length -= 1;
4779 }
4780 iocp->ioc_rval = 0;
4781 miocack(q, mp, sizeof (ldterm_cs_data_user_t), 0);
4782 return;
4783
4784 case PTSSTTY:
4785 tp->t_state |= TS_ISPTSTTY;
4786 break;
4787
4788 }
4789
4790 putnext(q, mp);
4791 }
4792
4793
4794 /*
4795 * Send an M_SETOPTS message upstream if any mode changes are being
4796 * made that affect the stream head options. returns -1 if allocb
4797 * fails, else returns 0.
4798 */
4799 static int
4800 chgstropts(struct termios *oldmodep, ldtermstd_state_t *tp, queue_t *q)
4801 {
4802 struct stroptions optbuf;
4803 mblk_t *bp;
4804
4805 optbuf.so_flags = 0;
4806 if ((oldmodep->c_lflag ^ tp->t_modes.c_lflag) & ICANON) {
4807 /*
4808 * Canonical mode is changing state; switch the
4809 * stream head to message-nondiscard or byte-stream
4810 * mode. Also, rerun the service procedure so it can
4811 * change its mind about whether to send data
4812 * upstream or not.
4813 */
4814 if (tp->t_modes.c_lflag & ICANON) {
4815 DEBUG4(("CHANGING TO CANON MODE\n"));
4816 optbuf.so_flags = SO_READOPT|SO_MREADOFF;
4817 optbuf.so_readopt = RMSGN;
4818
4819 /*
4820 * if there is a pending raw mode timeout,
4821 * clear it
4822 */
4823
4824 /*
4825 * Clear VMIN/VTIME state, cancel timers
4826 */
4827 vmin_satisfied(q, tp, 0);
4828 } else {
4829 DEBUG4(("CHANGING TO RAW MODE\n"));
4830 optbuf.so_flags = SO_READOPT|SO_MREADON;
4831 optbuf.so_readopt = RNORM;
4832 }
4833 }
4834 if ((oldmodep->c_lflag ^ tp->t_modes.c_lflag) & TOSTOP) {
4835 /*
4836 * The "stop on background write" bit is changing.
4837 */
4838 if (tp->t_modes.c_lflag & TOSTOP)
4839 optbuf.so_flags |= SO_TOSTOP;
4840 else
4841 optbuf.so_flags |= SO_TONSTOP;
4842 }
4843 if (optbuf.so_flags != 0) {
4844 if ((bp = allocb(sizeof (struct stroptions), BPRI_HI)) ==
4845 NULL) {
4846 return (-1);
4847 }
4848 *(struct stroptions *)bp->b_wptr = optbuf;
4849 bp->b_wptr += sizeof (struct stroptions);
4850 bp->b_datap->db_type = M_SETOPTS;
4851 DEBUG4(("M_SETOPTS to stream head\n"));
4852 putnext(q, bp);
4853 }
4854 return (0);
4855 }
4856
4857
4858 /*
4859 * Called when an M_IOCACK message is seen on the read queue;
4860 * modifies the data being returned, if necessary, and passes the
4861 * reply up.
4862 */
4863 static void
4864 ldterm_ioctl_reply(queue_t *q, mblk_t *mp)
4865 {
4866 ldtermstd_state_t *tp;
4867 struct iocblk *iocp;
4868
4869 iocp = (struct iocblk *)mp->b_rptr;
4870 tp = (ldtermstd_state_t *)q->q_ptr;
4871
4872 switch (iocp->ioc_cmd) {
4873
4874 case TCGETS:
4875 {
4876 /*
4877 * Get current parameters and return them to
4878 * stream head eventually.
4879 */
4880 struct termios *cb =
4881 (struct termios *)mp->b_cont->b_rptr;
4882
4883 /*
4884 * cflag has cflags sent upstream by the
4885 * driver
4886 */
4887 tcflag_t cflag = cb->c_cflag;
4888
4889 *cb = tp->t_amodes;
4890 if (cflag != 0)
4891 cb->c_cflag = cflag; /* set by driver */
4892 break;
4893 }
4894
4895 case TCGETA:
4896 {
4897 /*
4898 * Old-style "ioctl" to get current
4899 * parameters and return them to stream head
4900 * eventually.
4901 */
4902 struct termio *cb =
4903 (struct termio *)mp->b_cont->b_rptr;
4904
4905 cb->c_iflag = tp->t_amodes.c_iflag; /* all except the */
4906 cb->c_oflag = tp->t_amodes.c_oflag; /* cb->c_cflag */
4907 cb->c_lflag = tp->t_amodes.c_lflag;
4908
4909 if (cb->c_cflag == 0) /* not set by driver */
4910 cb->c_cflag = tp->t_amodes.c_cflag;
4911
4912 cb->c_line = 0;
4913 bcopy(tp->t_amodes.c_cc, cb->c_cc, NCC);
4914 break;
4915 }
4916 }
4917 putnext(q, mp);
4918 }
4919
4920
4921 /*
4922 * A VMIN/VTIME request has been satisfied. Cancel outstanding timers
4923 * if they exist, clear TS_MREAD state, and send upstream. If a NULL
4924 * queue ptr is passed, just reset VMIN/VTIME state.
4925 */
4926 static void
4927 vmin_satisfied(queue_t *q, ldtermstd_state_t *tp, int sendup)
4928 {
4929 ASSERT(q);
4930 if (tp->t_vtid != 0) {
4931 DEBUG4(("vmin_satisfied: cancelled timer id %d\n", tp->t_vtid));
4932 (void) quntimeout(q, tp->t_vtid);
4933 tp->t_vtid = 0;
4934 }
4935 if (sendup) {
4936 if (tp->t_msglen == 0 && V_MIN) {
4937 /* EMPTY */
4938 DEBUG4(("vmin_satisfied: data swiped, msglen = 0\n"));
4939 } else {
4940 if ((!q->q_first) ||
4941 (q->q_first->b_datap->db_type != M_DATA) ||
4942 (tp->t_msglen >= LDCHUNK)) {
4943 ldterm_msg_upstream(q, tp);
4944 DEBUG4(("vmin_satisfied: delivering data\n"));
4945 }
4946 }
4947 } else {
4948 /* EMPTY */
4949 DEBUG4(("vmin_satisfied: VMIN/TIME state reset\n"));
4950 }
4951 tp->t_state &= ~TS_MREAD;
4952 }
4953
4954 static void
4955 vmin_settimer(queue_t *q)
4956 {
4957 ldtermstd_state_t *tp;
4958
4959 tp = (ldtermstd_state_t *)q->q_ptr;
4960
4961 /*
4962 * Don't start any time bombs.
4963 */
4964 if (tp->t_state & TS_CLOSE)
4965 return;
4966
4967 /*
4968 * tp->t_vtid should NOT be set here unless VMIN > 0 and
4969 * VTIME > 0.
4970 */
4971 if (tp->t_vtid) {
4972 if (V_MIN && V_TIME) {
4973 /* EMPTY */
4974 DEBUG4(("vmin_settimer: timer restarted, old tid=%d\n",
4975 tp->t_vtid));
4976 } else {
4977 /* EMPTY */
4978 DEBUG4(("vmin_settimer: tid = %d was still active!\n",
4979 tp->t_vtid));
4980 }
4981 (void) quntimeout(q, tp->t_vtid);
4982 tp->t_vtid = 0;
4983 }
4984 tp->t_vtid = qtimeout(q, vmin_timed_out, q,
4985 (clock_t)(V_TIME * (hz / 10)));
4986 DEBUG4(("vmin_settimer: timer started, tid = %d\n", tp->t_vtid));
4987 }
4988
4989
4990 /*
4991 * BRRrrringgg!! VTIME was satisfied instead of VMIN
4992 */
4993 static void
4994 vmin_timed_out(void *arg)
4995 {
4996 queue_t *q = arg;
4997 ldtermstd_state_t *tp;
4998
4999 tp = (ldtermstd_state_t *)q->q_ptr;
5000
5001 DEBUG4(("vmin_timed_out: tid = %d\n", tp->t_vtid));
5002 /* don't call untimeout now that we are in the timeout */
5003 tp->t_vtid = 0;
5004 vmin_satisfied(q, tp, 1);
5005 }
5006
5007
5008 /*
5009 * Routine to adjust termios flags to be processed by the line
5010 * discipline. Driver below sends a termios structure, with the flags
5011 * the driver intends to process. XOR'ing the driver sent termios
5012 * structure with current termios structure with the default values
5013 * (or set by ioctls from userland), we come up with a new termios
5014 * structrue, the flags of which will be used by the line discipline
5015 * in processing input and output. On return from this routine, we
5016 * will have the following fields set in tp structure -->
5017 * tp->t_modes: modes the line discipline will process tp->t_amodes:
5018 * modes the user process thinks the line discipline is processing
5019 */
5020
5021 static void
5022 ldterm_adjust_modes(ldtermstd_state_t *tp)
5023 {
5024
5025 DEBUG6(("original iflag = %o\n", tp->t_modes.c_iflag));
5026 tp->t_modes.c_iflag = tp->t_amodes.c_iflag & ~(tp->t_dmodes.c_iflag);
5027 tp->t_modes.c_oflag = tp->t_amodes.c_oflag & ~(tp->t_dmodes.c_oflag);
5028 tp->t_modes.c_lflag = tp->t_amodes.c_lflag & ~(tp->t_dmodes.c_lflag);
5029 DEBUG6(("driver iflag = %o\n", tp->t_dmodes.c_iflag));
5030 DEBUG6(("apparent iflag = %o\n", tp->t_amodes.c_iflag));
5031 DEBUG6(("effective iflag = %o\n", tp->t_modes.c_iflag));
5032
5033 /* No negotiation of clfags c_cc array special characters */
5034 /*
5035 * Copy from amodes to modes already done by TCSETA/TCSETS
5036 * code
5037 */
5038 }
5039
5040
5041 /*
5042 * Erase one multi-byte character. If TS_MEUC is set AND this
5043 * is a multi-byte character, then this should be called instead of
5044 * ldterm_erase. "ldterm_erase" will handle ASCII nicely, thank you.
5045 *
5046 * We'd better be pointing to the last byte. If we aren't, it will get
5047 * screwed up.
5048 */
5049 static void
5050 ldterm_csi_erase(queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
5051 {
5052 int i, ung;
5053 uchar_t *p, *bottom;
5054 uchar_t u8[LDTERM_CS_MAX_BYTE_LENGTH];
5055 int c;
5056 int j;
5057 int len;
5058
5059 if (tp->t_eucleft) {
5060 /* XXX Ick. We're in the middle of an EUC! */
5061 /* What to do now? */
5062 ldterm_eucwarn(tp);
5063 return; /* ignore it??? */
5064 }
5065 bottom = tp->t_eucp_mp->b_rptr;
5066 p = tp->t_eucp - 1; /* previous byte */
5067 if (p < bottom)
5068 return;
5069 ung = 1; /* number of bytes to un-get from buffer */
5070 /*
5071 * go through the buffer until we find the beginning of the
5072 * multi-byte char.
5073 */
5074 while ((*p == 0) && (p > bottom)) {
5075 p--;
5076 ++ung;
5077 }
5078
5079 /*
5080 * Now, "ung" is the number of bytes to unget from the buffer
5081 * and "*p" is the disp width of it. Fool "ldterm_rubout"
5082 * into thinking we're rubbing out ASCII characters. Do that
5083 * for the display width of the character.
5084 *
5085 * Also we accumulate bytes of the character so that if the character
5086 * is a UTF-8 character, we will get the display width of the UTF-8
5087 * character.
5088 */
5089 if (ung >= LDTERM_CS_MAX_BYTE_LENGTH) {
5090 j = len = LDTERM_CS_MAX_BYTE_LENGTH;
5091 } else {
5092 j = len = ung;
5093 }
5094 for (i = 0; i < ung; i++) { /* remove from buf */
5095 if ((c = ldterm_unget(tp)) != (-1)) {
5096 ldterm_trim(tp);
5097 if (j > 0)
5098 u8[--j] = (uchar_t)c;
5099 }
5100 }
5101 if (*p == UNKNOWN_WIDTH) {
5102 if (tp->t_csdata.codeset_type == LDTERM_CS_TYPE_UTF8) {
5103 *p = ldterm_utf8_width(u8, len);
5104 } else {
5105 *p = 1;
5106 }
5107 }
5108 for (i = 0; i < (int)*p; i++) /* remove from screen */
5109 ldterm_rubout(' ', q, ebsize, tp);
5110 /*
5111 * Adjust the parallel array pointer. Zero out the contents
5112 * of parallel array for this position, just to make sure...
5113 */
5114 tp->t_eucp = p;
5115 *p = 0;
5116 }
5117
5118
5119 /*
5120 * This is kind of a safety valve. Whenever we see a bad sequence
5121 * come up, we call eucwarn. It just tallies the junk until a
5122 * threshold is reached. Then it prints ONE message on the console
5123 * and not any more. Hopefully, we can catch garbage; maybe it will
5124 * be useful to somebody.
5125 */
5126 static void
5127 ldterm_eucwarn(ldtermstd_state_t *tp)
5128 {
5129 ++tp->t_eucwarn;
5130 #ifdef DEBUG
5131 if ((tp->t_eucwarn > EUC_WARNCNT) && !(tp->t_state & TS_WARNED)) {
5132 cmn_err(CE_WARN,
5133 "ldterm: tty at addr %p in multi-byte mode --",
5134 (void *)tp);
5135 cmn_err(CE_WARN,
5136 "Over %d bad EUC characters this session", EUC_WARNCNT);
5137 tp->t_state |= TS_WARNED;
5138 }
5139 #endif
5140 }
5141
5142
5143 /*
5144 * Copy an "eucioc_t" structure. We use the structure with
5145 * incremented values for Codesets 2 & 3. The specification in
5146 * eucioctl is that the sames values as the CSWIDTH definition at
5147 * user level are passed to us. When we copy it "in" to ourselves, we
5148 * do the increment. That allows us to avoid treating each character
5149 * set separately for "t_eucleft" purposes. When we copy it "out" to
5150 * return it to the user, we decrement the values so the user gets
5151 * what it expects, and it matches CSWIDTH in the environment (if
5152 * things are consistent!).
5153 */
5154 static void
5155 cp_eucwioc(eucioc_t *from, eucioc_t *to, int dir)
5156 {
5157 bcopy(from, to, EUCSIZE);
5158 if (dir == EUCOUT) { /* copying out to user */
5159 if (to->eucw[2])
5160 --to->eucw[2];
5161 if (to->eucw[3])
5162 --to->eucw[3];
5163 } else { /* copying in */
5164 if (to->eucw[2])
5165 ++to->eucw[2];
5166 if (to->eucw[3])
5167 ++to->eucw[3];
5168 }
5169 }
5170
5171
5172 /*
5173 * Take the first byte of a multi-byte, or an ASCII char. Return its
5174 * codeset. If it's NOT the first byte of an EUC, then the return
5175 * value may be garbage, as it's probably not SS2 or SS3, and
5176 * therefore must be in codeset 1. Another bizarre catch here is the
5177 * fact that we don't do anything about the "C1" control codes. In
5178 * real life, we should; but nobody's come up with a good way of
5179 * treating them.
5180 */
5181
5182 static int
5183 ldterm_codeset(uchar_t codeset_type, uchar_t c)
5184 {
5185
5186 if (ISASCII(c))
5187 return (0);
5188
5189 if (codeset_type != LDTERM_CS_TYPE_EUC)
5190 return (1);
5191
5192 switch (c) {
5193 case SS2:
5194 return (2);
5195 case SS3:
5196 return (3);
5197 default:
5198 return (1);
5199 }
5200 }
5201
5202 /* The following two functions are additional EUC codeset specific methods. */
5203 /*
5204 * ldterm_dispwidth - Take the first byte of an EUC (or ASCII) and
5205 * return the display width. Since this is intended mostly for
5206 * multi-byte handling, it returns EUC_TWIDTH for tabs so they can be
5207 * differentiated from EUC characters (assumption: EUC require fewer
5208 * than 255 columns). Also, if it's a backspace and !flag, it
5209 * returns EUC_BSWIDTH. Newline & CR also depend on flag. This
5210 * routine SHOULD be cleaner than this, but we have the situation
5211 * where we may or may not be counting control characters as having a
5212 * column width. Therefore, the computation of ASCII is pretty messy.
5213 * The caller will be storing the value, and then switching on it
5214 * when it's used. We really should define the EUC_TWIDTH and other
5215 * constants in a header so that the routine could be used in other
5216 * modules in the kernel.
5217 */
5218 static int
5219 __ldterm_dispwidth_euc(uchar_t c, void *p, int mode)
5220 {
5221 ldtermstd_state_t *tp = (ldtermstd_state_t *)p;
5222
5223 if (ISASCII(c)) {
5224 if (c <= '\037') {
5225 switch (c) {
5226 case '\t':
5227 return (EUC_TWIDTH);
5228 case '\b':
5229 return (mode ? 2 : EUC_BSWIDTH);
5230 case '\n':
5231 return (EUC_NLWIDTH);
5232 case '\r':
5233 return (mode ? 2 : EUC_CRWIDTH);
5234 default:
5235 return (mode ? 2 : 0);
5236 }
5237 }
5238 return (1);
5239 }
5240 switch (c) {
5241 case SS2:
5242 return (tp->eucwioc.scrw[2]);
5243 case SS3:
5244 return (tp->eucwioc.scrw[3]);
5245 default:
5246 return (tp->eucwioc.scrw[1]);
5247 }
5248 }
5249
5250 /*
5251 * ldterm_memwidth_euc - Take the first byte of an EUC (or an ASCII char)
5252 * and return its memory width. The routine could have been
5253 * implemented to use only the codeset number, but that would require
5254 * the caller to have that value available. Perhaps the user doesn't
5255 * want to make the extra call or keep the value of codeset around.
5256 * Therefore, we use the actual character with which they're
5257 * concerned. This should never be called with anything but the
5258 * first byte of an EUC, otherwise it will return a garbage value.
5259 */
5260 static int
5261 __ldterm_memwidth_euc(uchar_t c, void *p)
5262 {
5263 ldtermstd_state_t *tp = (ldtermstd_state_t *)p;
5264
5265 if (ISASCII(c))
5266 return (1);
5267 switch (c) {
5268 case SS2:
5269 return (tp->eucwioc.eucw[2]);
5270 case SS3:
5271 return (tp->eucwioc.eucw[3]);
5272 default:
5273 return (tp->eucwioc.eucw[1]);
5274 }
5275 }
5276
5277
5278 /* The following two functions are PCCS codeset specific methods. */
5279 static int
5280 __ldterm_dispwidth_pccs(uchar_t c, void *p, int mode)
5281 {
5282 ldtermstd_state_t *tp = (ldtermstd_state_t *)p;
5283 int i;
5284
5285 if (ISASCII(c)) {
5286 if (c <= '\037') {
5287 switch (c) {
5288 case '\t':
5289 return (EUC_TWIDTH);
5290 case '\b':
5291 return (mode ? 2 : EUC_BSWIDTH);
5292 case '\n':
5293 return (EUC_NLWIDTH);
5294 case '\r':
5295 return (mode ? 2 : EUC_CRWIDTH);
5296 default:
5297 return (mode ? 2 : 0);
5298 }
5299 }
5300 return (1);
5301 }
5302
5303 for (i = 0; i < tp->t_csdata.csinfo_num; i++) {
5304 if (c >= tp->t_csdata.eucpc_data[i].msb_start &&
5305 c <= tp->t_csdata.eucpc_data[i].msb_end)
5306 return (tp->t_csdata.eucpc_data[i].screen_width);
5307 }
5308
5309 /*
5310 * If this leading byte is not in the range list, either provided
5311 * locale data is not sufficient or we encountered an invalid
5312 * character. We return 1 in this case as a fallback value.
5313 */
5314 return (1);
5315 }
5316
5317 static int
5318 __ldterm_memwidth_pccs(uchar_t c, void *p)
5319 {
5320 ldtermstd_state_t *tp = (ldtermstd_state_t *)p;
5321 int i;
5322
5323 for (i = 0; i < tp->t_csdata.csinfo_num; i++) {
5324 if (c >= tp->t_csdata.eucpc_data[i].msb_start &&
5325 c <= tp->t_csdata.eucpc_data[i].msb_end)
5326 return (tp->t_csdata.eucpc_data[i].byte_length);
5327 }
5328
5329 /*
5330 * If this leading byte is not in the range list, either provided
5331 * locale data is not sufficient or we encountered an invalid
5332 * character. We return 1 in this case as a fallback value.
5333 */
5334 return (1);
5335 }
5336
5337
5338 /* The following two functions are UTF-8 codeset specific methods. */
5339 static int
5340 __ldterm_dispwidth_utf8(uchar_t c, void *p, int mode)
5341 {
5342 ldtermstd_state_t *tp = (ldtermstd_state_t *)p;
5343
5344 if (ISASCII(c)) {
5345 if (c <= '\037') {
5346 switch (c) {
5347 case '\t':
5348 return (EUC_TWIDTH);
5349 case '\b':
5350 return (mode ? 2 : EUC_BSWIDTH);
5351 case '\n':
5352 return (EUC_NLWIDTH);
5353 case '\r':
5354 return (mode ? 2 : EUC_CRWIDTH);
5355 default:
5356 return (mode ? 2 : 0);
5357 }
5358 }
5359 return (1);
5360 }
5361
5362 /* This is to silence the lint. */
5363 if (tp->t_csdata.codeset_type != LDTERM_CS_TYPE_UTF8)
5364 return (1);
5365
5366 /*
5367 * If it is a valid leading byte of a UTF-8 character, we set
5368 * the width as 'UNKNOWN_WIDTH' for now. We need to have all
5369 * the bytes to figure out the display width.
5370 */
5371 if (c >= (uchar_t)0xc0 && c <= (uchar_t)0xfd)
5372 return (UNKNOWN_WIDTH);
5373
5374 /*
5375 * If it is an invalid leading byte, we just do our best by
5376 * giving the display width of 1.
5377 */
5378 return (1);
5379 }
5380
5381
5382 static int
5383 __ldterm_memwidth_utf8(uchar_t c, void *p)
5384 {
5385 ldtermstd_state_t *tp = (ldtermstd_state_t *)p;
5386 int len;
5387
5388 /*
5389 * If the codeset type doesn't match, we treat them as
5390 * an illegal character and return 1.
5391 */
5392 if (tp->t_csdata.codeset_type != LDTERM_CS_TYPE_UTF8)
5393 return (1);
5394
5395 len = u8_number_of_bytes[c];
5396
5397 /*
5398 * If this is a start of an illegal character, we treat
5399 * such as an 1 byte character and screen out.
5400 */
5401 return ((len <= 0) ? 1 : len);
5402 }
5403
5404 static uchar_t
5405 ldterm_utf8_width(uchar_t *u8, int length)
5406 {
5407 int i;
5408 int j;
5409 uint_t intcode = 0;
5410
5411 if (length == 0)
5412 return ('\0');
5413
5414 j = u8_number_of_bytes[u8[0]] - 1;
5415
5416 /*
5417 * If the UTF-8 character is out of UTF-16 code range, or,
5418 * if it is either an ASCII character or an invalid leading byte for
5419 * a UTF-8 character, return 1.
5420 */
5421 if (length > 4 || j <= 0)
5422 return ('\1');
5423
5424 intcode = u8[0] & u8_masks_tbl[j];
5425 for (i = 1; j > 0; j--, i++) {
5426 /*
5427 * The following additional checking is needed to conform to
5428 * the "UTF-8 Corrigendum" introduced at the Unicode 3.1 and
5429 * then updated one more time at the Unicode 3.2.
5430 */
5431 if (i == 1) {
5432 if (u8[i] < u8_valid_min_2nd_byte[u8[0]] ||
5433 u8[i] > u8_valid_max_2nd_byte[u8[0]])
5434 return ('\1');
5435 } else if (u8[i] < (uchar_t)LDTERM_CS_TYPE_UTF8_MIN_BYTE ||
5436 u8[i] > (uchar_t)LDTERM_CS_TYPE_UTF8_MAX_BYTE)
5437 return ('\1');
5438
5439 /*
5440 * All subsequent bytes of UTF-8 character has the following
5441 * binary encoding:
5442 *
5443 * 10xx xxxx
5444 *
5445 * hence left shift six bits to make space and then get
5446 * six bits from the new byte.
5447 */
5448 intcode = (intcode << LDTERM_CS_TYPE_UTF8_SHIFT_BITS) |
5449 (u8[i] & LDTERM_CS_TYPE_UTF8_BIT_MASK);
5450 }
5451
5452 i = 0;
5453 if (intcode <= LDTERM_CS_TYPE_UTF8_MAX_P00) {
5454 /* Basic Multilingual Plane. */
5455 i = intcode / 4;
5456 j = intcode % 4;
5457 switch (j) {
5458 case 0:
5459 i = ldterm_ucode[0][i].u0;
5460 break;
5461 case 1:
5462 i = ldterm_ucode[0][i].u1;
5463 break;
5464 case 2:
5465 i = ldterm_ucode[0][i].u2;
5466 break;
5467 case 3:
5468 i = ldterm_ucode[0][i].u3;
5469 break;
5470 }
5471 } else if (intcode <= LDTERM_CS_TYPE_UTF8_MAX_P01) {
5472 /* Secondary Multilingual Plane. */
5473 intcode = intcode & (uint_t)0xffff;
5474 i = intcode / 4;
5475 j = intcode % 4;
5476 switch (j) {
5477 case 0:
5478 i = ldterm_ucode[1][i].u0;
5479 break;
5480 case 1:
5481 i = ldterm_ucode[1][i].u1;
5482 break;
5483 case 2:
5484 i = ldterm_ucode[1][i].u2;
5485 break;
5486 case 3:
5487 i = ldterm_ucode[1][i].u3;
5488 break;
5489 }
5490 } else if ((intcode >= LDTERM_CS_TYPE_UTF8_MIN_CJKEXTB &&
5491 intcode <= LDTERM_CS_TYPE_UTF8_MAX_CJKEXTB) ||
5492 (intcode >= LDTERM_CS_TYPE_UTF8_MIN_CJKCOMP &&
5493 intcode <= LDTERM_CS_TYPE_UTF8_MAX_CJKCOMP) ||
5494 (intcode >= LDTERM_CS_TYPE_UTF8_MIN_P15 &&
5495 intcode <= LDTERM_CS_TYPE_UTF8_MAX_P15) ||
5496 (intcode >= LDTERM_CS_TYPE_UTF8_MIN_P16 &&
5497 intcode <= LDTERM_CS_TYPE_UTF8_MAX_P16)) {
5498 /*
5499 * Supplementary Plane for CJK Ideographs and
5500 * Private Use Planes.
5501 */
5502 return ('\2');
5503 } else if ((intcode >= LDTERM_CS_TYPE_UTF8_MIN_P14 &&
5504 intcode <= LDTERM_CS_TYPE_UTF8_MAX_P14) ||
5505 (intcode >= LDTERM_CS_TYPE_UTF8_MIN_VARSEL &&
5506 intcode <= LDTERM_CS_TYPE_UTF8_MAX_VARSEL)) {
5507 /*
5508 * Some Special Purpose Plane characters:
5509 * These are like control characters and not printable.
5510 */
5511 return ('\0');
5512 }
5513
5514 /*
5515 * We return the display width of 1 for all character code points
5516 * that we didn't catch from the above logic and also for combining
5517 * and conjoining characters with width value of zero.
5518 *
5519 * In particular, the reason why we are returning 1 for combining
5520 * and conjoining characters is because the GUI-based terminal
5521 * emulators are not yet capable of properly handling such characters
5522 * and in most of the cases, they just treat such characters as if
5523 * they occupy a display cell. If the terminal emulators are capable of
5524 * handling the characters correctly, then, this logic of returning
5525 * 1 should be revisited and changed. See CR 6660526 for more
5526 * details on this.
5527 */
5528 return ((i == 0) ? '\1' : (uchar_t)i);
5529 }