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) 2014, Joyent, Inc. All rights reserved.
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 void ldtermrput(queue_t *, mblk_t *);
420 static void ldtermrsrv(queue_t *);
421 static int ldtermrmsg(queue_t *, mblk_t *);
422 static void ldtermwput(queue_t *, mblk_t *);
423 static void 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 (int (*)())ldtermrput,
578 (int (*)())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 (int (*)())ldtermwput,
598 (int (*)())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 void
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;
976 }
977 }
978
979 switch (dbtype) {
980
981 default:
982 (void) putq(q, mp);
983 return;
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;
995
996 case M_IOCACK:
997
998 ldterm_ioctl_reply(q, mp);
999 return;
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;
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;
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;
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;
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;
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;
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;
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;
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;
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 }
1475
1476
1477 /*
1478 * Line discipline input server processing. Erase/kill and escape
1479 * ('\') processing, gathering into messages, upper/lower case input
1480 * mapping.
1481 */
1482 static void
1483 ldtermrsrv(queue_t *q)
1484 {
1485 ldtermstd_state_t *tp;
1486 mblk_t *mp;
1487
1488 tp = (ldtermstd_state_t *)q->q_ptr;
1489
1490 if (tp->t_state & TS_RESCAN) {
1491 /*
1492 * Canonicalization was turned on or off. Put the
1493 * message being assembled back in the input queue,
1494 * so that we rescan it.
1495 */
1496 if (tp->t_message != NULL) {
1497 DEBUG5(("RESCAN WAS SET; put back in q\n"));
1498 if (tp->t_msglen != 0)
1499 (void) putbq(q, tp->t_message);
1500 else
1501 freemsg(tp->t_message);
1502 tp->t_message = NULL;
1503 tp->t_endmsg = NULL;
1504 tp->t_msglen = 0;
1505 }
1506 if (tp->t_state & TS_MEUC) {
1507 ASSERT(tp->t_eucp_mp);
1508 tp->t_eucp = tp->t_eucp_mp->b_rptr;
1509 tp->t_codeset = 0;
1510 tp->t_eucleft = 0;
1511 }
1512 tp->t_state &= ~TS_RESCAN;
1513 }
1514
1515 while ((mp = getq(q)) != NULL) {
1516 if (!ldtermrmsg(q, mp))
1517 break;
1518 }
1519
1520 /*
1521 * Flow control: send start message if blocked and our queue
1522 * is below its low water mark.
1523 */
1524 if ((tp->t_modes.c_iflag & IXOFF) && (tp->t_state & TS_TBLOCK) &&
1525 !(tp->t_state & TS_IFBLOCK) && q->q_count <= TTXOLO) {
1526 tp->t_state &= ~TS_TBLOCK;
1527 (void) putctl(WR(q), M_STARTI);
1528 }
1529 }
1530
1531 /*
1532 * This routine is called from both ldtermrput and ldtermrsrv to
1533 * do the actual work of dealing with mp. Return 1 on sucesss and
1534 * 0 on failure.
1535 */
1536 static int
1537 ldtermrmsg(queue_t *q, mblk_t *mp)
1538 {
1539 unsigned char c;
1540 int dofree;
1541 int status = 1;
1542 size_t ebsize;
1543 mblk_t *bp;
1544 mblk_t *bpt;
1545 ldtermstd_state_t *tp;
1546
1547 bpt = NULL;
1548
1549 tp = (ldtermstd_state_t *)q->q_ptr;
1550
1551 if (mp->b_datap->db_type <= QPCTL && !bcanputnext(q, mp->b_band)) {
1552 /*
1553 * Stream head is flow controlled. If echo is
1554 * turned on, flush the read side or send a
1555 * bell down the line to stop input and
1556 * process the current message.
1557 * Otherwise(putbq) the user will not see any
1558 * response to to the typed input. Typically
1559 * happens if there is no reader process.
1560 * Note that you will loose the data in this
1561 * case if the data is coming too fast. There
1562 * is an assumption here that if ECHO is
1563 * turned on its some user typing the data on
1564 * a terminal and its not network.
1565 */
1566 if (tp->t_modes.c_lflag & ECHO) {
1567 if ((tp->t_modes.c_iflag & IMAXBEL) &&
1568 (tp->t_modes.c_lflag & ICANON)) {
1569 freemsg(mp);
1570 if (canputnext(WR(q)))
1571 ldterm_outchar(CTRL('g'), WR(q), 4, tp);
1572 status = 0;
1573 goto echo;
1574 } else {
1575 (void) putctl1(q, M_FLUSH, FLUSHR);
1576 }
1577 } else {
1578 (void) putbq(q, mp);
1579 status = 0;
1580 goto out; /* read side is blocked */
1581 }
1582 }
1583 switch (mp->b_datap->db_type) {
1584
1585 default:
1586 putnext(q, mp); /* pass it on */
1587 goto out;
1588
1589 case M_HANGUP:
1590 /*
1591 * Flush everything we haven't looked at yet.
1592 */
1593 flushq(q, FLUSHDATA);
1594
1595 /*
1596 * Flush everything we have looked at.
1597 */
1598 freemsg(tp->t_message);
1599 tp->t_message = NULL;
1600 tp->t_endmsg = NULL;
1601 tp->t_msglen = 0;
1602 /*
1603 * XXX should we set read request
1604 * tp->t_rd_request to NULL?
1605 */
1606 tp->t_rocount = 0; /* if it hasn't been typed */
1607 tp->t_rocol = 0; /* it hasn't been echoed :-) */
1608 if (tp->t_state & TS_MEUC) {
1609 ASSERT(tp->t_eucp_mp);
1610 tp->t_eucp = tp->t_eucp_mp->b_rptr;
1611 }
1612 /*
1613 * Restart output, since it's probably got
1614 * nowhere to go anyway, and we're probably
1615 * not going to see another ^Q for a while.
1616 */
1617 if (tp->t_state & TS_TTSTOP) {
1618 tp->t_state &= ~(TS_TTSTOP|TS_OFBLOCK);
1619 (void) putnextctl(WR(q), M_START);
1620 }
1621 /*
1622 * This message will travel up the read
1623 * queue, flushing as it goes, get turned
1624 * around at the stream head, and travel back
1625 * down the write queue, flushing as it goes.
1626 */
1627 (void) putnextctl1(q, M_FLUSH, FLUSHW);
1628
1629 /*
1630 * This message will travel down the write
1631 * queue, flushing as it goes, get turned
1632 * around at the driver, and travel back up
1633 * the read queue, flushing as it goes.
1634 */
1635 (void) putctl1(WR(q), M_FLUSH, FLUSHR);
1636
1637 /*
1638 * Now that that's done, we send a SIGCONT
1639 * upstream, followed by the M_HANGUP.
1640 */
1641 /* (void) putnextctl1(q, M_PCSIG, SIGCONT); */
1642 putnext(q, mp);
1643 goto out;
1644
1645 case M_IOCACK:
1646
1647 /*
1648 * Augment whatever information the driver is
1649 * returning with the information we supply.
1650 */
1651 ldterm_ioctl_reply(q, mp);
1652 goto out;
1653
1654 case M_DATA:
1655 break;
1656 }
1657
1658 /*
1659 * This is an M_DATA message.
1660 */
1661
1662 /*
1663 * If somebody below us ("intelligent" communications
1664 * board, pseudo-tty controlled by an editor) is
1665 * doing canonicalization, don't scan it for special
1666 * characters.
1667 */
1668 if (tp->t_state & TS_NOCANON) {
1669 putnext(q, mp);
1670 goto out;
1671 }
1672 bp = mp;
1673
1674 if ((bpt = newmsg(tp)) != NULL) {
1675 mblk_t *bcont;
1676
1677 do {
1678 ASSERT(bp->b_wptr >= bp->b_rptr);
1679 ebsize = bp->b_wptr - bp->b_rptr;
1680 if (ebsize > EBSIZE)
1681 ebsize = EBSIZE;
1682 bcont = bp->b_cont;
1683 if (CANON_MODE) {
1684 /*
1685 * By default, free the message once processed
1686 */
1687 dofree = 1;
1688
1689 /*
1690 * update sysinfo canch
1691 * character. The value of
1692 * canch may vary as compared
1693 * to character tty
1694 * implementation.
1695 */
1696 while (bp->b_rptr < bp->b_wptr) {
1697 c = *bp->b_rptr++;
1698 if ((bpt = ldterm_docanon(c,
1699 bpt, ebsize, q, tp, &dofree)) ==
1700 NULL)
1701 break;
1702 }
1703 /*
1704 * Release this block or put back on queue.
1705 */
1706 if (dofree)
1707 freeb(bp);
1708 else {
1709 (void) putbq(q, bp);
1710 break;
1711 }
1712 } else
1713 bpt = ldterm_dononcanon(bp, bpt, ebsize, q, tp);
1714 if (bpt == NULL) {
1715 cmn_err(CE_WARN,
1716 "ldtermrsrv: out of blocks");
1717 freemsg(bcont);
1718 break;
1719 }
1720 } while ((bp = bcont) != NULL);
1721 }
1722 echo:
1723 /*
1724 * Send whatever we echoed downstream.
1725 */
1726 if (tp->t_echomp != NULL) {
1727 if (canputnext(WR(q)))
1728 putnext(WR(q), tp->t_echomp);
1729 else
1730 freemsg(tp->t_echomp);
1731 tp->t_echomp = NULL;
1732 }
1733
1734 out:
1735 return (status);
1736 }
1737
1738
1739 /*
1740 * Do canonical mode input; check whether this character is to be
1741 * treated as a special character - if so, check whether it's equal
1742 * to any of the special characters and handle it accordingly.
1743 * Otherwise, just add it to the current line.
1744 */
1745 static mblk_t *
1746 ldterm_docanon(uchar_t c, mblk_t *bpt, size_t ebsize, queue_t *q,
1747 ldtermstd_state_t *tp, int *dofreep)
1748 {
1749 queue_t *wrq = WR(q);
1750 int i;
1751
1752 /*
1753 * If the previous character was the "literal next"
1754 * character, treat this character as regular input.
1755 */
1756 if (tp->t_state & TS_SLNCH)
1757 goto escaped;
1758
1759 /*
1760 * Setting a special character to NUL disables it, so if this
1761 * character is NUL, it should not be compared with any of
1762 * the special characters.
1763 */
1764 if (c == _POSIX_VDISABLE) {
1765 tp->t_state &= ~TS_QUOT;
1766 goto escaped;
1767 }
1768 /*
1769 * If this character is the literal next character, echo it
1770 * as '^', backspace over it, and record that fact.
1771 */
1772 if ((tp->t_modes.c_lflag & IEXTEN) && c == tp->t_modes.c_cc[VLNEXT]) {
1773 if (tp->t_modes.c_lflag & ECHO)
1774 ldterm_outstring((unsigned char *)"^\b", 2, wrq,
1775 ebsize, tp);
1776 tp->t_state |= TS_SLNCH;
1777 goto out;
1778 }
1779 /*
1780 * Check for the editing character. If the display width of
1781 * the last byte at the canonical buffer is not one and also
1782 * smaller than or equal to UNKNOWN_WIDTH, the character at
1783 * the end of the buffer is a multi-byte and/or multi-column
1784 * character.
1785 */
1786 if (c == tp->t_modes.c_cc[VERASE] || c == tp->t_modes.c_cc[VERASE2]) {
1787 if (tp->t_state & TS_QUOT) {
1788 /*
1789 * Get rid of the backslash, and put the
1790 * erase character in its place.
1791 */
1792 ldterm_erase(wrq, ebsize, tp);
1793 bpt = tp->t_endmsg;
1794 goto escaped;
1795 } else {
1796 if ((tp->t_state & TS_MEUC) && tp->t_msglen &&
1797 (*(tp->t_eucp - 1) != 1 &&
1798 *(tp->t_eucp - 1) <= UNKNOWN_WIDTH))
1799 ldterm_csi_erase(wrq, ebsize, tp);
1800 else
1801 ldterm_erase(wrq, ebsize, tp);
1802 bpt = tp->t_endmsg;
1803 goto out;
1804 }
1805 }
1806 if ((tp->t_modes.c_lflag & IEXTEN) && c == tp->t_modes.c_cc[VWERASE]) {
1807 /*
1808 * Do "ASCII word" or "multibyte character token/chunk" erase.
1809 */
1810 if (tp->t_state & TS_MEUC)
1811 ldterm_csi_werase(wrq, ebsize, tp);
1812 else
1813 ldterm_werase(wrq, ebsize, tp);
1814 bpt = tp->t_endmsg;
1815 goto out;
1816 }
1817 if (c == tp->t_modes.c_cc[VKILL]) {
1818 if (tp->t_state & TS_QUOT) {
1819 /*
1820 * Get rid of the backslash, and put the kill
1821 * character in its place.
1822 */
1823 ldterm_erase(wrq, ebsize, tp);
1824 bpt = tp->t_endmsg;
1825 goto escaped;
1826 } else {
1827 ldterm_kill(wrq, ebsize, tp);
1828 bpt = tp->t_endmsg;
1829 goto out;
1830 }
1831 }
1832 if ((tp->t_modes.c_lflag & IEXTEN) && c == tp->t_modes.c_cc[VREPRINT]) {
1833 ldterm_reprint(wrq, ebsize, tp);
1834 goto out;
1835 }
1836 /*
1837 * If the preceding character was a backslash: if the current
1838 * character is an EOF, get rid of the backslash and treat
1839 * the EOF as data; if we're in XCASE mode and the current
1840 * character is part of a backslash-X escape sequence,
1841 * process it; otherwise, just treat the current character
1842 * normally.
1843 */
1844 if (tp->t_state & TS_QUOT) {
1845 tp->t_state &= ~TS_QUOT;
1846 if (c == tp->t_modes.c_cc[VEOF]) {
1847 /*
1848 * EOF character. Since it's escaped, get rid
1849 * of the backslash and put the EOF character
1850 * in its place.
1851 */
1852 ldterm_erase(wrq, ebsize, tp);
1853 bpt = tp->t_endmsg;
1854 } else {
1855 /*
1856 * If we're in XCASE mode, and the current
1857 * character is part of a backslash-X
1858 * sequence, get rid of the backslash and
1859 * replace the current character with what
1860 * that sequence maps to.
1861 */
1862 if ((tp->t_modes.c_lflag & XCASE) &&
1863 imaptab[c] != '\0') {
1864 ldterm_erase(wrq, ebsize, tp);
1865 bpt = tp->t_endmsg;
1866 c = imaptab[c];
1867 }
1868 }
1869 } else {
1870 /*
1871 * Previous character wasn't backslash; check whether
1872 * this was the EOF character.
1873 */
1874 if (c == tp->t_modes.c_cc[VEOF]) {
1875 /*
1876 * EOF character. Don't echo it unless
1877 * ECHOCTL is set, don't stuff it in the
1878 * current line, but send the line up the
1879 * stream.
1880 */
1881 if ((tp->t_modes.c_lflag & ECHOCTL) &&
1882 (tp->t_modes.c_lflag & IEXTEN) &&
1883 (tp->t_modes.c_lflag & ECHO)) {
1884 i = ldterm_echo(c, wrq, ebsize, tp);
1885 while (i > 0) {
1886 ldterm_outchar('\b', wrq, ebsize, tp);
1887 i--;
1888 }
1889 }
1890 bpt->b_datap->db_type = M_DATA;
1891 ldterm_msg_upstream(q, tp);
1892 if (!canputnext(q)) {
1893 bpt = NULL;
1894 *dofreep = 0;
1895 } else {
1896 bpt = newmsg(tp);
1897 *dofreep = 1;
1898 }
1899 goto out;
1900 }
1901 }
1902
1903 escaped:
1904 /*
1905 * First, make sure we can fit one WHOLE multi-byte char in the
1906 * buffer. This is one place where we have overhead even if
1907 * not in multi-byte mode; the overhead is subtracting
1908 * tp->t_maxeuc from MAX_CANON before checking.
1909 *
1910 * Allows MAX_CANON bytes in the buffer before throwing awaying
1911 * the the overflow of characters.
1912 */
1913 if ((tp->t_msglen > ((_TTY_BUFSIZ + 1) - (int)tp->t_maxeuc)) &&
1914 !((tp->t_state & TS_MEUC) && tp->t_eucleft)) {
1915
1916 /*
1917 * Byte will cause line to overflow, or the next EUC
1918 * won't fit: Ring the bell or discard all input, and
1919 * don't save the byte away.
1920 */
1921 if (tp->t_modes.c_iflag & IMAXBEL) {
1922 if (canputnext(wrq))
1923 ldterm_outchar(CTRL('g'), wrq, ebsize, tp);
1924 goto out;
1925 } else {
1926 /*
1927 * MAX_CANON processing. free everything in
1928 * the current line and start with the
1929 * current character as the first character.
1930 */
1931 DEBUG7(("ldterm_docanon: MAX_CANON processing\n"));
1932 freemsg(tp->t_message);
1933 tp->t_message = NULL;
1934 tp->t_endmsg = NULL;
1935 tp->t_msglen = 0;
1936 tp->t_rocount = 0; /* if it hasn't been type */
1937 tp->t_rocol = 0; /* it hasn't been echoed :-) */
1938 if (tp->t_state & TS_MEUC) {
1939 ASSERT(tp->t_eucp_mp);
1940 tp->t_eucp = tp->t_eucp_mp->b_rptr;
1941 }
1942 tp->t_state &= ~TS_SLNCH;
1943 bpt = newmsg(tp);
1944 }
1945 }
1946 /*
1947 * Add the character to the current line.
1948 */
1949 if (bpt->b_wptr >= bpt->b_datap->db_lim) {
1950 /*
1951 * No more room in this mblk; save this one away, and
1952 * allocate a new one.
1953 */
1954 bpt->b_datap->db_type = M_DATA;
1955 if ((bpt = allocb(IBSIZE, BPRI_MED)) == NULL)
1956 goto out;
1957
1958 /*
1959 * Chain the new one to the end of the old one, and
1960 * mark it as the last block in the current line.
1961 */
1962 tp->t_endmsg->b_cont = bpt;
1963 tp->t_endmsg = bpt;
1964 }
1965 *bpt->b_wptr++ = c;
1966 tp->t_msglen++; /* message length in BYTES */
1967
1968 /*
1969 * In multi-byte mode, we have to keep track of where we are.
1970 * The first bytes of multi-byte chars get the full count for the
1971 * whole character. We don't do any column calculations
1972 * here, but we need the information for when we do. We could
1973 * come across cases where we are getting garbage on the
1974 * line, but we're in multi-byte mode. In that case, we may
1975 * see ASCII controls come in the middle of what should have been a
1976 * multi-byte character. Call ldterm_eucwarn...eventually, a
1977 * warning message will be printed about it.
1978 */
1979 if (tp->t_state & TS_MEUC) {
1980 if (tp->t_eucleft) { /* if in a multi-byte char already */
1981 --tp->t_eucleft;
1982 *tp->t_eucp++ = 0; /* is a subsequent byte */
1983 if (c < (uchar_t)0x20)
1984 ldterm_eucwarn(tp);
1985 } else { /* is the first byte of a multi-byte, or is ASCII */
1986 if (ISASCII(c)) {
1987 *tp->t_eucp++ =
1988 tp->t_csmethods.ldterm_dispwidth(c,
1989 (void *)tp, tp->t_modes.c_lflag & ECHOCTL);
1990 tp->t_codeset = 0;
1991 } else {
1992 *tp->t_eucp++ =
1993 tp->t_csmethods.ldterm_dispwidth(c,
1994 (void *)tp, tp->t_modes.c_lflag & ECHOCTL);
1995 tp->t_eucleft =
1996 tp->t_csmethods.ldterm_memwidth(c,
1997 (void *)tp) - 1;
1998 tp->t_codeset = ldterm_codeset(
1999 tp->t_csdata.codeset_type, c);
2000 }
2001 }
2002 }
2003 /*
2004 * AT&T is concerned about the following but we aren't since
2005 * we have already shipped code that works.
2006 *
2007 * EOL2/XCASE should be conditioned with IEXTEN to be truly
2008 * POSIX conformant. This is going to cause problems for
2009 * pre-SVR4.0 programs that don't know about IEXTEN. Hence
2010 * EOL2/IEXTEN is not conditioned with IEXTEN.
2011 */
2012 if (!(tp->t_state & TS_SLNCH) &&
2013 (c == '\n' || (c != '\0' && (c == tp->t_modes.c_cc[VEOL] ||
2014 (c == tp->t_modes.c_cc[VEOL2]))))) {
2015 /*
2016 * || ((tp->t_modes.c_lflag & IEXTEN) && c ==
2017 * tp->t_modes.c_cc[VEOL2]))))) {
2018 */
2019 /*
2020 * It's a line-termination character; send the line
2021 * up the stream.
2022 */
2023 bpt->b_datap->db_type = M_DATA;
2024 ldterm_msg_upstream(q, tp);
2025 if (tp->t_state & TS_MEUC) {
2026 ASSERT(tp->t_eucp_mp);
2027 tp->t_eucp = tp->t_eucp_mp->b_rptr;
2028 }
2029 if ((bpt = newmsg(tp)) == NULL)
2030 goto out;
2031 } else {
2032 /*
2033 * Character was escaped with LNEXT.
2034 */
2035 if (tp->t_rocount++ == 0)
2036 tp->t_rocol = tp->t_col;
2037 tp->t_state &= ~(TS_SLNCH|TS_QUOT);
2038 /*
2039 * If the current character is a single byte and single
2040 * column character and it is the backslash character and
2041 * IEXTEN, then the state will have TS_QUOT.
2042 */
2043 if ((c == '\\') && (tp->t_modes.c_lflag & IEXTEN) &&
2044 (!(tp->t_state & TS_MEUC) ||
2045 ((tp->t_state & TS_MEUC) && (!tp->t_eucleft))))
2046 tp->t_state |= TS_QUOT;
2047 }
2048
2049 /*
2050 * Echo it.
2051 */
2052 if (tp->t_state & TS_ERASE) {
2053 tp->t_state &= ~TS_ERASE;
2054 if (tp->t_modes.c_lflag & ECHO)
2055 ldterm_outchar('/', wrq, ebsize, tp);
2056 }
2057 if (tp->t_modes.c_lflag & ECHO)
2058 (void) ldterm_echo(c, wrq, ebsize, tp);
2059 else {
2060 /*
2061 * Echo NL when ECHO turned off, if ECHONL flag is
2062 * set.
2063 */
2064 if (c == '\n' && (tp->t_modes.c_lflag & ECHONL))
2065 ldterm_outchar(c, wrq, ebsize, tp);
2066 }
2067
2068 out:
2069
2070 return (bpt);
2071 }
2072
2073
2074 static int
2075 ldterm_unget(ldtermstd_state_t *tp)
2076 {
2077 mblk_t *bpt;
2078
2079 if ((bpt = tp->t_endmsg) == NULL)
2080 return (-1); /* no buffers */
2081 if (bpt->b_rptr == bpt->b_wptr)
2082 return (-1); /* zero-length record */
2083 tp->t_msglen--; /* one fewer character */
2084 return (*--bpt->b_wptr);
2085 }
2086
2087
2088 static void
2089 ldterm_trim(ldtermstd_state_t *tp)
2090 {
2091 mblk_t *bpt;
2092 mblk_t *bp;
2093
2094 ASSERT(tp->t_endmsg);
2095 bpt = tp->t_endmsg;
2096
2097 if (bpt->b_rptr == bpt->b_wptr) {
2098 /*
2099 * This mblk is now empty. Find the previous mblk;
2100 * throw this one away, unless it's the first one.
2101 */
2102 bp = tp->t_message;
2103 if (bp != bpt) {
2104 while (bp->b_cont != bpt) {
2105 ASSERT(bp->b_cont);
2106 bp = bp->b_cont;
2107 }
2108 bp->b_cont = NULL;
2109 freeb(bpt);
2110 tp->t_endmsg = bp; /* point to that mblk */
2111 }
2112 }
2113 }
2114
2115
2116 /*
2117 * Rubout one character from the current line being built for tp as
2118 * cleanly as possible. q is the write queue for tp. Most of this
2119 * can't be applied to multi-byte processing. We do our own thing
2120 * for that... See the "ldterm_eucerase" routine. We never call
2121 * ldterm_rubout on a multi-byte or multi-column character.
2122 */
2123 static void
2124 ldterm_rubout(uchar_t c, queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2125 {
2126 int tabcols;
2127 static unsigned char crtrubout[] = "\b \b\b \b";
2128 #define RUBOUT1 &crtrubout[3] /* rub out one position */
2129 #define RUBOUT2 &crtrubout[0] /* rub out two positions */
2130
2131 if (!(tp->t_modes.c_lflag & ECHO))
2132 return;
2133 if (tp->t_modes.c_lflag & ECHOE) {
2134 /*
2135 * "CRT rubout"; try erasing it from the screen.
2136 */
2137 if (tp->t_rocount == 0) {
2138 /*
2139 * After the character being erased was
2140 * echoed, some data was written to the
2141 * terminal; we can't erase it cleanly, so we
2142 * just reprint the whole line as if the user
2143 * had typed the reprint character.
2144 */
2145 ldterm_reprint(q, ebsize, tp);
2146 return;
2147 } else {
2148 /*
2149 * XXX what about escaped characters?
2150 */
2151 switch (typetab[c]) {
2152
2153 case ORDINARY:
2154 if ((tp->t_modes.c_lflag & XCASE) &&
2155 omaptab[c])
2156 ldterm_outstring(RUBOUT1, 3, q, ebsize,
2157 tp);
2158 ldterm_outstring(RUBOUT1, 3, q, ebsize, tp);
2159 break;
2160
2161 case VTAB:
2162 case BACKSPACE:
2163 case CONTROL:
2164 case RETURN:
2165 case NEWLINE:
2166 if ((tp->t_modes.c_lflag & ECHOCTL) &&
2167 (tp->t_modes.c_lflag & IEXTEN))
2168 ldterm_outstring(RUBOUT2, 6, q, ebsize,
2169 tp);
2170 break;
2171
2172 case TAB:
2173 if (tp->t_rocount < tp->t_msglen) {
2174 /*
2175 * While the tab being erased was
2176 * expanded, some data was written
2177 * to the terminal; we can't erase
2178 * it cleanly, so we just reprint
2179 * the whole line as if the user
2180 * had typed the reprint character.
2181 */
2182 ldterm_reprint(q, ebsize, tp);
2183 return;
2184 }
2185 tabcols = ldterm_tabcols(tp);
2186 while (--tabcols >= 0)
2187 ldterm_outchar('\b', q, ebsize, tp);
2188 break;
2189 }
2190 }
2191 } else if ((tp->t_modes.c_lflag & ECHOPRT) &&
2192 (tp->t_modes.c_lflag & IEXTEN)) {
2193 /*
2194 * "Printing rubout"; echo it between \ and /.
2195 */
2196 if (!(tp->t_state & TS_ERASE)) {
2197 ldterm_outchar('\\', q, ebsize, tp);
2198 tp->t_state |= TS_ERASE;
2199 }
2200 (void) ldterm_echo(c, q, ebsize, tp);
2201 } else
2202 (void) ldterm_echo(tp->t_modes.c_cc[VERASE], q, ebsize, tp);
2203 tp->t_rocount--; /* we "unechoed" this character */
2204 }
2205
2206
2207 /*
2208 * Find the number of characters the tab we just deleted took up by
2209 * zipping through the current line and recomputing the column
2210 * number.
2211 */
2212 static int
2213 ldterm_tabcols(ldtermstd_state_t *tp)
2214 {
2215 int col;
2216 int i;
2217 mblk_t *bp;
2218 unsigned char *readp, *endp;
2219 unsigned char c;
2220 uchar_t *startp;
2221 char errflg;
2222 uchar_t u8[LDTERM_CS_MAX_BYTE_LENGTH];
2223
2224 col = tp->t_rocol;
2225 /*
2226 * If we're doing multi-byte stuff, zip through the list of
2227 * widths to figure out where we are (we've kept track in most
2228 * cases).
2229 */
2230 if (tp->t_state & TS_MEUC) {
2231 ASSERT(tp->t_eucp_mp);
2232 bp = tp->t_message;
2233 startp = bp->b_datap->db_base;
2234 readp = tp->t_eucp_mp->b_rptr;
2235 endp = tp->t_eucp;
2236 errflg = (char)0;
2237 while (readp < endp) {
2238 switch (*readp) {
2239 case EUC_TWIDTH: /* it's a tab */
2240 col |= 07; /* bump up */
2241 col++;
2242 break;
2243 case EUC_BSWIDTH: /* backspace */
2244 if (col)
2245 col--;
2246 break;
2247 case EUC_NLWIDTH: /* newline */
2248 if (tp->t_modes.c_oflag & ONLRET)
2249 col = 0;
2250 break;
2251 case EUC_CRWIDTH: /* return */
2252 col = 0;
2253 break;
2254 case UNKNOWN_WIDTH: /* UTF-8 unknown width */
2255 if (tp->t_csdata.codeset_type !=
2256 LDTERM_CS_TYPE_UTF8 || errflg) {
2257 *readp = 1;
2258 col++;
2259 break;
2260 }
2261 /*
2262 * Collect the current UTF-8 character bytes
2263 * from (possibly multiple) data buffers so
2264 * that we can figure out the display width.
2265 */
2266 u8[0] = *startp;
2267 for (i = 1; (i < LDTERM_CS_MAX_BYTE_LENGTH) &&
2268 (*(readp + i) == 0); i++) {
2269 startp++;
2270 if (startp >= bp->b_datap->db_lim) {
2271 if (bp->b_cont) {
2272 bp = bp->b_cont;
2273 startp =
2274 bp->b_datap->
2275 db_base;
2276 } else {
2277 *readp = 1;
2278 col++;
2279 break;
2280 }
2281 }
2282 u8[i] = *startp;
2283 }
2284
2285 /* tp->t_eucp_mp contains wrong info?? */
2286 if (*readp == 1)
2287 break;
2288
2289 *readp = ldterm_utf8_width(u8, i);
2290
2291 col += *readp;
2292 readp += (i - 1);
2293 break;
2294 default:
2295 col += *readp;
2296 break;
2297 }
2298 ++readp;
2299 ++startp;
2300 if (startp >= bp->b_datap->db_lim) {
2301 if (bp->b_cont) {
2302 bp = bp->b_cont;
2303 startp = bp->b_datap->db_base;
2304 } else {
2305 /*
2306 * This will happen only if
2307 * tp->t_eucp_mp contains wrong
2308 * display width info.
2309 */
2310 errflg = (char)1;
2311 startp--;
2312 }
2313 }
2314 }
2315 goto eucout; /* finished! */
2316 }
2317 bp = tp->t_message;
2318 do {
2319 readp = bp->b_rptr;
2320 while (readp < bp->b_wptr) {
2321 c = *readp++;
2322 if ((tp->t_modes.c_lflag & ECHOCTL) &&
2323 (tp->t_modes.c_lflag & IEXTEN)) {
2324 if (c <= 037 && c != '\t' && c != '\n' ||
2325 c == 0177) {
2326 col += 2;
2327 continue;
2328 }
2329 }
2330 /*
2331 * Column position calculated here.
2332 */
2333 switch (typetab[c]) {
2334
2335 /*
2336 * Ordinary characters; advance by
2337 * one.
2338 */
2339 case ORDINARY:
2340 col++;
2341 break;
2342
2343 /*
2344 * Non-printing characters; nothing
2345 * happens.
2346 */
2347 case CONTROL:
2348 break;
2349
2350 /* Backspace */
2351 case BACKSPACE:
2352 if (col != 0)
2353 col--;
2354 break;
2355
2356 /* Newline; column depends on flags. */
2357 case NEWLINE:
2358 if (tp->t_modes.c_oflag & ONLRET)
2359 col = 0;
2360 break;
2361
2362 /* tab */
2363 case TAB:
2364 col |= 07;
2365 col++;
2366 break;
2367
2368 /* vertical motion */
2369 case VTAB:
2370 break;
2371
2372 /* carriage return */
2373 case RETURN:
2374 col = 0;
2375 break;
2376 }
2377 }
2378 } while ((bp = bp->b_cont) != NULL); /* next block, if any */
2379
2380 /*
2381 * "col" is now the column number before the tab. "tp->t_col"
2382 * is still the column number after the tab, since we haven't
2383 * erased the tab yet. Thus "tp->t_col - col" is the number
2384 * of positions the tab moved.
2385 */
2386 eucout:
2387 col = tp->t_col - col;
2388 if (col > 8)
2389 col = 8; /* overflow screw */
2390 return (col);
2391 }
2392
2393
2394 /*
2395 * Erase a single character; We ONLY ONLY deal with ASCII or
2396 * single-column single-byte codeset character. For multi-byte characters,
2397 * see "ldterm_csi_erase".
2398 */
2399 static void
2400 ldterm_erase(queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2401 {
2402 int c;
2403
2404 if ((c = ldterm_unget(tp)) != -1) {
2405 ldterm_rubout((unsigned char) c, q, ebsize, tp);
2406 ldterm_trim(tp);
2407 if (tp->t_state & TS_MEUC)
2408 --tp->t_eucp;
2409 }
2410 }
2411
2412
2413 /*
2414 * Erase an entire word, single-byte EUC only please.
2415 */
2416 static void
2417 ldterm_werase(queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2418 {
2419 int c;
2420
2421 /*
2422 * Erase trailing white space, if any.
2423 */
2424 while ((c = ldterm_unget(tp)) == ' ' || c == '\t') {
2425 ldterm_rubout((unsigned char) c, q, ebsize, tp);
2426 ldterm_trim(tp);
2427 }
2428
2429 /*
2430 * Erase non-white-space characters, if any.
2431 */
2432 while (c != -1 && c != ' ' && c != '\t') {
2433 ldterm_rubout((unsigned char) c, q, ebsize, tp);
2434 ldterm_trim(tp);
2435 c = ldterm_unget(tp);
2436 }
2437 if (c != -1) {
2438 /*
2439 * We removed one too many characters; put the last
2440 * one back.
2441 */
2442 tp->t_endmsg->b_wptr++; /* put 'c' back */
2443 tp->t_msglen++;
2444 }
2445 }
2446
2447
2448 /*
2449 * ldterm_csi_werase - This is multi-byte equivalent of "word erase".
2450 * "Word erase" only makes sense in languages which space between words,
2451 * and it's presumptuous for us to attempt "word erase" when we don't
2452 * know anything about what's really going on. It makes no sense for
2453 * many languages, as the criteria for defining words and tokens may
2454 * be completely different.
2455 *
2456 * In the TS_MEUC case (which is how we got here), we define a token to
2457 * be space- or tab-delimited, and erase one of them. It helps to
2458 * have this for command lines, but it's otherwise useless for text
2459 * editing applications; you need more sophistication than we can
2460 * provide here.
2461 */
2462 static void
2463 ldterm_csi_werase(queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2464 {
2465 int c, i;
2466 int len;
2467 uchar_t *ip;
2468 uchar_t u8[LDTERM_CS_MAX_BYTE_LENGTH];
2469 uchar_t u8_2[LDTERM_CS_MAX_BYTE_LENGTH];
2470
2471 /*
2472 * ip points to the width of the actual bytes. t_eucp points
2473 * one byte beyond, where the next thing will be inserted.
2474 */
2475 ip = tp->t_eucp - 1;
2476 /*
2477 * Erase trailing white space, if any.
2478 */
2479 while ((c = ldterm_unget(tp)) == ' ' || c == '\t') {
2480 tp->t_eucp--;
2481 ldterm_rubout((unsigned char) c, q, ebsize, tp);
2482 ldterm_trim(tp);
2483 --ip;
2484 }
2485
2486 /*
2487 * Erase non-white-space characters, if any. The outer loop
2488 * bops through each byte in the buffer. Multi-byte is removed, as
2489 * is ASCII, one byte at a time. The inner loop (for) is only
2490 * executed for first bytes of multi-byte. The inner loop erases
2491 * the number of columns required for the multi-byte char. We check
2492 * for ASCII first, and ldterm_rubout knows about ASCII.
2493 */
2494 len = 0;
2495 while (c != -1 && c != ' ' && c != '\t') {
2496 tp->t_eucp--;
2497 if (len < LDTERM_CS_MAX_BYTE_LENGTH) {
2498 u8[len++] = (uchar_t)c;
2499 }
2500 /*
2501 * Unlike EUC, except the leading byte, some bytes of
2502 * a non-EUC multi-byte characters are in the ASCII code
2503 * range, esp., 0x41 ~ 0x7a. Thus, we cannot simply check
2504 * ISASCII().
2505 * Checking the (*ip == 1 || *ip == 2 || *ip > UNKNOWN_WIDTH)
2506 * will ensure that it is a single byte character (even though
2507 * it is on display width not byte length) and can be further
2508 * checked whether it is an ASCII character or not.
2509 *
2510 * When ECHOCTL is on and 'c' is an ASCII control character,
2511 * *ip == 2 happens.
2512 */
2513 if ((*ip == 1 || *ip == 2 || *ip > UNKNOWN_WIDTH) &&
2514 ISASCII(c)) {
2515 ldterm_rubout((unsigned char) c, q, ebsize, tp);
2516 len = 0;
2517 } else if (*ip) {
2518 if (*ip == UNKNOWN_WIDTH) {
2519 if (tp->t_csdata.codeset_type ==
2520 LDTERM_CS_TYPE_UTF8) {
2521 for (i = 0; i < len; i++)
2522 u8_2[i] = u8[len - i - 1];
2523 *ip = ldterm_utf8_width(u8_2, len);
2524 } else {
2525 *ip = 1;
2526 }
2527 }
2528 /*
2529 * erase for number of columns required for
2530 * this multi-byte character. Hopefully, matches
2531 * ldterm_dispwidth!
2532 */
2533 for (i = 0; i < (int)*ip; i++)
2534 ldterm_rubout(' ', q, ebsize, tp);
2535 len = 0;
2536 }
2537 ldterm_trim(tp);
2538 --ip;
2539 c = ldterm_unget(tp);
2540 }
2541 if (c != -1) {
2542 /*
2543 * We removed one too many characters; put the last
2544 * one back.
2545 */
2546 tp->t_endmsg->b_wptr++; /* put 'c' back */
2547 tp->t_msglen++;
2548 }
2549 }
2550
2551
2552 /*
2553 * Kill an entire line, erasing each character one-by-one (if ECHOKE
2554 * is set) or just echoing the kill character, followed by a newline
2555 * (if ECHOK is set). Multi-byte processing is included here.
2556 */
2557
2558 static void
2559 ldterm_kill(queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2560 {
2561 int c, i;
2562 int len;
2563 uchar_t *ip;
2564 uchar_t u8[LDTERM_CS_MAX_BYTE_LENGTH];
2565 uchar_t u8_2[LDTERM_CS_MAX_BYTE_LENGTH];
2566
2567 if ((tp->t_modes.c_lflag & ECHOKE) &&
2568 (tp->t_modes.c_lflag & IEXTEN) &&
2569 (tp->t_msglen == tp->t_rocount)) {
2570 if (tp->t_state & TS_MEUC) {
2571 ip = tp->t_eucp - 1;
2572 /*
2573 * This loop similar to "ldterm_csi_werase" above.
2574 */
2575 len = 0;
2576 while ((c = ldterm_unget(tp)) != (-1)) {
2577 tp->t_eucp--;
2578 if (len < LDTERM_CS_MAX_BYTE_LENGTH) {
2579 u8[len++] = (uchar_t)c;
2580 }
2581 if ((*ip == 1 || *ip == 2 ||
2582 *ip > UNKNOWN_WIDTH) && ISASCII(c)) {
2583 ldterm_rubout((unsigned char) c, q,
2584 ebsize, tp);
2585 len = 0;
2586 } else if (*ip) {
2587 if (*ip == UNKNOWN_WIDTH) {
2588 if (tp->t_csdata.codeset_type
2589 == LDTERM_CS_TYPE_UTF8) {
2590 for (i = 0; i < len;
2591 i++)
2592 u8_2[i] =
2593 u8[len-i-1];
2594 *ip = ldterm_utf8_width(
2595 u8_2, len);
2596 } else {
2597 *ip = 1;
2598 }
2599 }
2600 for (i = 0; i < (int)*ip; i++)
2601 ldterm_rubout(' ', q, ebsize,
2602 tp);
2603 len = 0;
2604 }
2605 ldterm_trim(tp);
2606 --ip;
2607 }
2608 } else {
2609 while ((c = ldterm_unget(tp)) != -1) {
2610 ldterm_rubout((unsigned char) c, q, ebsize, tp);
2611 ldterm_trim(tp);
2612 }
2613 }
2614 } else {
2615 (void) ldterm_echo(tp->t_modes.c_cc[VKILL], q, ebsize, tp);
2616 if (tp->t_modes.c_lflag & ECHOK)
2617 (void) ldterm_echo('\n', q, ebsize, tp);
2618 while (ldterm_unget(tp) != -1) {
2619 if (tp->t_state & TS_MEUC)
2620 --tp->t_eucp;
2621 ldterm_trim(tp);
2622 }
2623 tp->t_rocount = 0;
2624 if (tp->t_state & TS_MEUC)
2625 tp->t_eucp = tp->t_eucp_mp->b_rptr;
2626 }
2627 tp->t_state &= ~(TS_QUOT|TS_ERASE|TS_SLNCH);
2628 }
2629
2630
2631 /*
2632 * Reprint the current input line. We assume c_cc has already been
2633 * checked. XXX just the current line, not the whole queue? What
2634 * about DEFECHO mode?
2635 */
2636 static void
2637 ldterm_reprint(queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2638 {
2639 mblk_t *bp;
2640 unsigned char *readp;
2641
2642 if (tp->t_modes.c_cc[VREPRINT] != (unsigned char) 0)
2643 (void) ldterm_echo(tp->t_modes.c_cc[VREPRINT], q, ebsize, tp);
2644 ldterm_outchar('\n', q, ebsize, tp);
2645
2646 bp = tp->t_message;
2647 do {
2648 readp = bp->b_rptr;
2649 while (readp < bp->b_wptr)
2650 (void) ldterm_echo(*readp++, q, ebsize, tp);
2651 } while ((bp = bp->b_cont) != NULL); /* next block, if any */
2652
2653 tp->t_state &= ~TS_ERASE;
2654 tp->t_rocount = tp->t_msglen; /* we reechoed the entire line */
2655 tp->t_rocol = 0;
2656 }
2657
2658
2659 /*
2660 * Non canonical processing. Called with q locked from ldtermrsrv.
2661 *
2662 */
2663 static mblk_t *
2664 ldterm_dononcanon(mblk_t *bp, mblk_t *bpt, size_t ebsize, queue_t *q,
2665 ldtermstd_state_t *tp)
2666 {
2667 queue_t *wrq = WR(q);
2668 unsigned char *rptr;
2669 size_t bytes_in_bp;
2670 size_t roomleft;
2671 size_t bytes_to_move;
2672 int free_flag = 0;
2673
2674 if (tp->t_modes.c_lflag & (ECHO|ECHONL|IEXTEN)) {
2675 unsigned char *wptr;
2676 unsigned char c;
2677
2678 /*
2679 * Either we must echo the characters, or we must
2680 * echo NL, or we must check for VLNEXT. Process
2681 * characters one at a time.
2682 */
2683 rptr = bp->b_rptr;
2684 wptr = bp->b_rptr;
2685 while (rptr < bp->b_wptr) {
2686 c = *rptr++;
2687 /*
2688 * If this character is the literal next
2689 * character, echo it as '^' and backspace
2690 * over it if echoing is enabled, indicate
2691 * that the next character is to be treated
2692 * literally, and remove the LNEXT from the
2693 * input stream.
2694 *
2695 * If the *previous* character was the literal
2696 * next character, don't check whether this
2697 * is a literal next or not.
2698 */
2699 if ((tp->t_modes.c_lflag & IEXTEN) &&
2700 !(tp->t_state & TS_SLNCH) &&
2701 c != _POSIX_VDISABLE &&
2702 c == tp->t_modes.c_cc[VLNEXT]) {
2703 if (tp->t_modes.c_lflag & ECHO)
2704 ldterm_outstring(
2705 (unsigned char *)"^\b",
2706 2, wrq, ebsize, tp);
2707 tp->t_state |= TS_SLNCH;
2708 continue; /* and ignore it */
2709 }
2710 /*
2711 * Not a "literal next" character, so it
2712 * should show up as input. If it was
2713 * literal-nexted, turn off the literal-next
2714 * flag.
2715 */
2716 tp->t_state &= ~TS_SLNCH;
2717 *wptr++ = c;
2718 if (tp->t_modes.c_lflag & ECHO) {
2719 /*
2720 * Echo the character.
2721 */
2722 (void) ldterm_echo(c, wrq, ebsize, tp);
2723 } else if (tp->t_modes.c_lflag & ECHONL) {
2724 /*
2725 * Echo NL, even though ECHO is not
2726 * set.
2727 */
2728 if (c == '\n')
2729 ldterm_outchar('\n', wrq, 1, tp);
2730 }
2731 }
2732 bp->b_wptr = wptr;
2733 } else {
2734 /*
2735 * If there are any characters in this buffer, and
2736 * the first of them was literal-nexted, turn off the
2737 * literal-next flag.
2738 */
2739 if (bp->b_rptr != bp->b_wptr)
2740 tp->t_state &= ~TS_SLNCH;
2741 }
2742
2743 ASSERT(bp->b_wptr >= bp->b_rptr);
2744 bytes_in_bp = bp->b_wptr - bp->b_rptr;
2745 rptr = bp->b_rptr;
2746 while (bytes_in_bp != 0) {
2747 roomleft = bpt->b_datap->db_lim - bpt->b_wptr;
2748 if (roomleft == 0) {
2749 /*
2750 * No more room in this mblk; save this one
2751 * away, and allocate a new one.
2752 */
2753 if ((bpt = allocb(IBSIZE, BPRI_MED)) == NULL) {
2754 freeb(bp);
2755 DEBUG4(("ldterm_do_noncanon: allcob failed\n"));
2756 return (bpt);
2757 }
2758 /*
2759 * Chain the new one to the end of the old
2760 * one, and mark it as the last block in the
2761 * current lump.
2762 */
2763 tp->t_endmsg->b_cont = bpt;
2764 tp->t_endmsg = bpt;
2765 roomleft = IBSIZE;
2766 }
2767 DEBUG5(("roomleft=%d, bytes_in_bp=%d, tp->t_rd_request=%d\n",
2768 roomleft, bytes_in_bp, tp->t_rd_request));
2769 /*
2770 * if there is a read pending before this data got
2771 * here move bytes according to the minimum of room
2772 * left in this buffer, bytes in the message and byte
2773 * count requested in the read. If there is no read
2774 * pending, move the minimum of the first two
2775 */
2776 if (tp->t_rd_request == 0)
2777 bytes_to_move = MIN(roomleft, bytes_in_bp);
2778 else
2779 bytes_to_move =
2780 MIN(MIN(roomleft, bytes_in_bp), tp->t_rd_request);
2781 DEBUG5(("Bytes to move = %lu\n", bytes_to_move));
2782 if (bytes_to_move == 0)
2783 break;
2784 bcopy(rptr, bpt->b_wptr, bytes_to_move);
2785 bpt->b_wptr += bytes_to_move;
2786 rptr += bytes_to_move;
2787 tp->t_msglen += bytes_to_move;
2788 bytes_in_bp -= bytes_to_move;
2789 }
2790 if (bytes_in_bp == 0) {
2791 DEBUG4(("bytes_in_bp is zero\n"));
2792 freeb(bp);
2793 } else
2794 free_flag = 1; /* for debugging olny */
2795
2796 DEBUG4(("ldterm_do_noncanon: VMIN = %d, VTIME = %d, msglen = %d, \
2797 tid = %d\n", V_MIN, V_TIME, tp->t_msglen, tp->t_vtid));
2798 /*
2799 * If there is a pending read request at the stream head we
2800 * need to do VMIN/VTIME processing. The four possible cases
2801 * are:
2802 * MIN = 0, TIME > 0
2803 * MIN = >, TIME = 0
2804 * MIN > 0, TIME > 0
2805 * MIN = 0, TIME = 0
2806 * If we can satisfy VMIN, send it up, and start a new
2807 * timer if necessary. These four cases of VMIN/VTIME
2808 * are also dealt with in the write side put routine
2809 * when the M_READ is first seen.
2810 */
2811
2812 DEBUG4(("Incoming data while M_READ'ing\n"));
2813 /*
2814 * Case 1: Any data will satisfy the read, so send
2815 * it upstream.
2816 */
2817 if (V_MIN == 0 && V_TIME > 0) {
2818 if (tp->t_msglen)
2819 vmin_satisfied(q, tp, 1);
2820 else {
2821 /* EMPTY */
2822 DEBUG4(("ldterm_do_noncanon called, but no data!\n"));
2823 }
2824 /*
2825 * Case 2: This should never time out, so
2826 * until there's enough data, do nothing.
2827 */
2828 } else if (V_MIN > 0 && V_TIME == 0) {
2829 if (tp->t_msglen >= (int)V_MIN)
2830 vmin_satisfied(q, tp, 1);
2831
2832 /*
2833 * Case 3: If MIN is satisfied, send it up.
2834 * Also, remember to start a new timer *every*
2835 * time we see something if MIN isn't
2836 * safisfied
2837 */
2838 } else if (V_MIN > 0 && V_TIME > 0) {
2839 if (tp->t_msglen >= (int)V_MIN)
2840 vmin_satisfied(q, tp, 1);
2841 else
2842 vmin_settimer(q);
2843 /*
2844 * Case 4: Not possible. This request
2845 * should always be satisfied from the write
2846 * side, left here for debugging.
2847 */
2848 } else { /* V_MIN == 0 && V_TIME == 0 */
2849 vmin_satisfied(q, tp, 1);
2850 }
2851
2852 if (free_flag) {
2853 /* EMPTY */
2854 DEBUG4(("CAUTION message block not freed\n"));
2855 }
2856 return (newmsg(tp));
2857 }
2858
2859
2860 /*
2861 * Echo a typed byte to the terminal. Returns the number of bytes
2862 * printed. Bytes of EUC characters drop through the ECHOCTL stuff
2863 * and are just output as themselves.
2864 */
2865 static int
2866 ldterm_echo(uchar_t c, queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
2867 {
2868 int i;
2869
2870 if (!(tp->t_modes.c_lflag & ECHO))
2871 return (0);
2872 i = 0;
2873
2874 /*
2875 * Echo control characters (c <= 37) only if the ECHOCTRL
2876 * flag is set as ^X.
2877 */
2878
2879 if ((tp->t_modes.c_lflag & ECHOCTL) &&
2880 (tp->t_modes.c_lflag & IEXTEN)) {
2881 if (c <= 037 && c != '\t' && c != '\n') {
2882 ldterm_outchar('^', q, ebsize, tp);
2883 i++;
2884 if (tp->t_modes.c_oflag & OLCUC)
2885 c += 'a' - 1;
2886 else
2887 c += 'A' - 1;
2888 } else if (c == 0177) {
2889 ldterm_outchar('^', q, ebsize, tp);
2890 i++;
2891 c = '?';
2892 }
2893 ldterm_outchar(c, q, ebsize, tp);
2894 return (i + 1);
2895 /* echo only special control character and the Bell */
2896 } else if ((c > 037 && c != 0177) || c == '\t' || c == '\n' ||
2897 c == '\r' || c == '\b' || c == 007 ||
2898 c == tp->t_modes.c_cc[VKILL]) {
2899 ldterm_outchar(c, q, ebsize, tp);
2900 return (i + 1);
2901 }
2902 return (i);
2903 }
2904
2905
2906 /*
2907 * Put a character on the output queue.
2908 */
2909 static void
2910 ldterm_outchar(uchar_t c, queue_t *q, size_t bsize, ldtermstd_state_t *tp)
2911 {
2912 mblk_t *curbp;
2913
2914 /*
2915 * Don't even look at the characters unless we have something
2916 * useful to do with them.
2917 */
2918 if ((tp->t_modes.c_oflag & OPOST) ||
2919 ((tp->t_modes.c_lflag & XCASE) &&
2920 (tp->t_modes.c_lflag & ICANON))) {
2921 mblk_t *mp;
2922
2923 if ((mp = allocb(4, BPRI_HI)) == NULL) {
2924 cmn_err(CE_WARN,
2925 "ldterm: (ldterm_outchar) out of blocks");
2926 return;
2927 }
2928 *mp->b_wptr++ = c;
2929 mp = ldterm_output_msg(q, mp, &tp->t_echomp, tp, bsize, 1);
2930 if (mp != NULL)
2931 freemsg(mp);
2932
2933 } else {
2934 if ((curbp = tp->t_echomp) != NULL) {
2935 while (curbp->b_cont != NULL)
2936 curbp = curbp->b_cont;
2937 if (curbp->b_datap->db_lim == curbp->b_wptr) {
2938 mblk_t *newbp;
2939
2940 if ((newbp = allocb(bsize, BPRI_HI)) == NULL) {
2941 cmn_err(CE_WARN,
2942 "ldterm_outchar: out of blocks");
2943 return;
2944 }
2945 curbp->b_cont = newbp;
2946 curbp = newbp;
2947 }
2948 } else {
2949 if ((curbp = allocb(bsize, BPRI_HI)) == NULL) {
2950 cmn_err(CE_WARN,
2951 "ldterm_outchar: out of blocks");
2952 return;
2953 }
2954 tp->t_echomp = curbp;
2955 }
2956 *curbp->b_wptr++ = c;
2957 }
2958 }
2959
2960
2961 /*
2962 * Copy a string, of length len, to the output queue.
2963 */
2964 static void
2965 ldterm_outstring(uchar_t *cp, int len, queue_t *q, size_t bsize,
2966 ldtermstd_state_t *tp)
2967 {
2968 while (len > 0) {
2969 ldterm_outchar(*cp++, q, bsize, tp);
2970 len--;
2971 }
2972 }
2973
2974
2975 static mblk_t *
2976 newmsg(ldtermstd_state_t *tp)
2977 {
2978 mblk_t *bp;
2979
2980 /*
2981 * If no current message, allocate a block for it.
2982 */
2983 if ((bp = tp->t_endmsg) == NULL) {
2984 if ((bp = allocb(IBSIZE, BPRI_MED)) == NULL) {
2985 cmn_err(CE_WARN,
2986 "ldterm: (ldtermrsrv/newmsg) out of blocks");
2987 return (bp);
2988 }
2989 tp->t_message = bp;
2990 tp->t_endmsg = bp;
2991 }
2992 return (bp);
2993 }
2994
2995
2996 static void
2997 ldterm_msg_upstream(queue_t *q, ldtermstd_state_t *tp)
2998 {
2999 ssize_t s;
3000 mblk_t *bp;
3001
3002 bp = tp->t_message;
3003 s = msgdsize(bp);
3004 if (bp)
3005 putnext(q, tp->t_message);
3006
3007 /*
3008 * update sysinfo canch character.
3009 */
3010 if (CANON_MODE)
3011 (void) drv_setparm(SYSCANC, s);
3012 tp->t_message = NULL;
3013 tp->t_endmsg = NULL;
3014 tp->t_msglen = 0;
3015 tp->t_rocount = 0;
3016 tp->t_rd_request = 0;
3017 if (tp->t_state & TS_MEUC) {
3018 ASSERT(tp->t_eucp_mp);
3019 tp->t_eucp = tp->t_eucp_mp->b_rptr;
3020 /* can't reset everything, as we may have other input */
3021 }
3022 }
3023
3024
3025 /*
3026 * Re-enable the write-side service procedure. When an allocation
3027 * failure causes write-side processing to stall, we disable the
3028 * write side and arrange to call this function when allocation once
3029 * again becomes possible.
3030 */
3031 static void
3032 ldterm_wenable(void *addr)
3033 {
3034 queue_t *q = addr;
3035 ldtermstd_state_t *tp;
3036
3037 tp = (ldtermstd_state_t *)q->q_ptr;
3038 /*
3039 * The bufcall is no longer pending.
3040 */
3041 tp->t_wbufcid = 0;
3042 enableok(q);
3043 qenable(q);
3044 }
3045
3046
3047 /*
3048 * Line discipline output queue put procedure. Attempts to process
3049 * the message directly and send it on downstream, queueing it only
3050 * if there's already something pending or if its downstream neighbor
3051 * is clogged.
3052 */
3053 static void
3054 ldtermwput(queue_t *q, mblk_t *mp)
3055 {
3056 ldtermstd_state_t *tp;
3057 unsigned char type = mp->b_datap->db_type;
3058
3059 tp = (ldtermstd_state_t *)q->q_ptr;
3060
3061 /*
3062 * Always process priority messages, regardless of whether or
3063 * not our queue is nonempty.
3064 */
3065 if (type >= QPCTL) {
3066 switch (type) {
3067
3068 case M_FLUSH:
3069 /*
3070 * Get rid of it, see comment in
3071 * ldterm_dosig().
3072 */
3073 if ((tp->t_state & TS_FLUSHWAIT) &&
3074 (*mp->b_rptr == FLUSHW)) {
3075 tp->t_state &= ~TS_FLUSHWAIT;
3076 freemsg(mp);
3077 return;
3078 }
3079 /*
3080 * This is coming from above, so we only
3081 * handle the write queue here. If FLUSHR is
3082 * set, it will get turned around at the
3083 * driver, and the read procedure will see it
3084 * eventually.
3085 */
3086 if (*mp->b_rptr & FLUSHW) {
3087 if ((tp->t_state & TS_ISPTSTTY) &&
3088 (*mp->b_rptr & FLUSHBAND))
3089 flushband(q, *(mp->b_rptr + 1),
3090 FLUSHDATA);
3091 else
3092 flushq(q, FLUSHDATA);
3093 }
3094
3095 putnext(q, mp);
3096 /*
3097 * If a timed read is interrupted, there is
3098 * no way to cancel an existing M_READ
3099 * request. We kludge by allowing a flush to
3100 * do so.
3101 */
3102 if (tp->t_state & TS_MREAD)
3103 vmin_satisfied(RD(q), tp, 0);
3104 break;
3105
3106 case M_READ:
3107 DEBUG1(("ldtermwmsg:M_READ RECEIVED\n"));
3108 /*
3109 * Stream head needs data to satisfy timed
3110 * read. Has meaning only if ICANON flag is
3111 * off indicating raw mode
3112 */
3113
3114 DEBUG4((
3115 "M_READ: RAW_MODE=%d, CNT=%d, VMIN=%d, VTIME=%d\n",
3116 RAW_MODE, *(unsigned int *)mp->b_rptr, V_MIN,
3117 V_TIME));
3118
3119 tp->t_rd_request = *(unsigned int *)mp->b_rptr;
3120
3121 if (RAW_MODE) {
3122 if (newmsg(tp) != NULL) {
3123 /*
3124 * VMIN/VTIME processing...
3125 * The four possible cases are:
3126 * MIN = 0, TIME > 0
3127 * MIN = >, TIME = 0
3128 * MIN > 0, TIME > 0
3129 * MIN = 0, TIME = 0
3130 * These four conditions must be dealt
3131 * with on the read side as well in
3132 * ldterm_do_noncanon(). Set TS_MREAD
3133 * so that the read side will know
3134 * there is a pending read request
3135 * waiting at the stream head. If we
3136 * can satisfy MIN do it here, rather
3137 * than on the read side. If we can't,
3138 * start timers if necessary and let
3139 * the other side deal with it.
3140 *
3141 * We got another M_READ before the
3142 * pending one completed, cancel any
3143 * existing timeout.
3144 */
3145 if (tp->t_state & TS_MREAD) {
3146 vmin_satisfied(RD(q),
3147 tp, 0);
3148 }
3149 tp->t_state |= TS_MREAD;
3150 /*
3151 * Case 1: Any data will
3152 * satisfy read, otherwise
3153 * start timer
3154 */
3155 if (V_MIN == 0 && V_TIME > 0) {
3156 if (tp->t_msglen)
3157 vmin_satisfied(RD(q),
3158 tp, 1);
3159 else
3160 vmin_settimer(RD(q));
3161
3162 /*
3163 * Case 2: If we have enough
3164 * data, send up now.
3165 * Otherwise, the read side
3166 * should wait forever until MIN
3167 * is satisified.
3168 */
3169 } else if (V_MIN > 0 && V_TIME == 0) {
3170 if (tp->t_msglen >= (int)V_MIN)
3171 vmin_satisfied(RD(q),
3172 tp, 1);
3173
3174 /*
3175 * Case 3: If we can satisfy
3176 * the read, send it up. If we
3177 * don't have enough data, but
3178 * there is at least one char,
3179 * start a timer. Otherwise,
3180 * let the read side start
3181 * the timer.
3182 */
3183 } else if (V_MIN > 0 && V_TIME > 0) {
3184 if (tp->t_msglen >= (int)V_MIN)
3185 vmin_satisfied(RD(q),
3186 tp, 1);
3187 else if (tp->t_msglen)
3188 vmin_settimer(RD(q));
3189 /*
3190 * Case 4: Read returns
3191 * whatever data is available
3192 * or zero if none.
3193 */
3194 } else { /* V_MIN == 0 && V_TIME == 0 */
3195 vmin_satisfied(RD(q), tp, 1);
3196 }
3197
3198 } else /* should do bufcall, really! */
3199 cmn_err(CE_WARN,
3200 "ldtermwmsg: out of blocks");
3201 }
3202 /*
3203 * pass M_READ down
3204 */
3205 putnext(q, mp);
3206 break;
3207
3208 default:
3209 /* Pass it through unmolested. */
3210 putnext(q, mp);
3211 break;
3212 }
3213 return;
3214 }
3215 /*
3216 * If our queue is nonempty or there's a traffic jam
3217 * downstream, this message must get in line.
3218 */
3219 if (q->q_first != NULL || !bcanputnext(q, mp->b_band)) {
3220 /*
3221 * Exception: ioctls, except for those defined to
3222 * take effect after output has drained, should be
3223 * processed immediately.
3224 */
3225 if (type == M_IOCTL) {
3226 struct iocblk *iocp;
3227
3228 iocp = (struct iocblk *)mp->b_rptr;
3229 switch (iocp->ioc_cmd) {
3230
3231 /*
3232 * Queue these.
3233 */
3234 case TCSETSW:
3235 case TCSETSF:
3236 case TCSETAW:
3237 case TCSETAF:
3238 case TCSBRK:
3239 break;
3240
3241 /*
3242 * Handle all others immediately.
3243 */
3244 default:
3245 (void) ldtermwmsg(q, mp);
3246 return;
3247 }
3248 }
3249 (void) putq(q, mp);
3250 return;
3251 }
3252 /*
3253 * We can take the fast path through, by simply calling
3254 * ldtermwmsg to dispose of mp.
3255 */
3256 (void) ldtermwmsg(q, mp);
3257 }
3258
3259
3260 /*
3261 * Line discipline output queue service procedure.
3262 */
3263 static void
3264 ldtermwsrv(queue_t *q)
3265 {
3266 mblk_t *mp;
3267
3268 /*
3269 * We expect this loop to iterate at most once, but must be
3270 * prepared for more in case our upstream neighbor isn't
3271 * paying strict attention to what canput tells it.
3272 */
3273 while ((mp = getq(q)) != NULL) {
3274 /*
3275 * N.B.: ldtermwput has already handled high-priority
3276 * messages, so we don't have to worry about them
3277 * here. Hence, the putbq call is safe.
3278 */
3279 if (!bcanputnext(q, mp->b_band)) {
3280 (void) putbq(q, mp);
3281 break;
3282 }
3283 if (!ldtermwmsg(q, mp)) {
3284 /*
3285 * Couldn't handle the whole thing; give up
3286 * for now and wait to be rescheduled.
3287 */
3288 break;
3289 }
3290 }
3291 }
3292
3293
3294 /*
3295 * Process the write-side message denoted by mp. If mp can't be
3296 * processed completely (due to allocation failures), put the
3297 * residual unprocessed part on the front of the write queue, disable
3298 * the queue, and schedule a qbufcall to arrange to complete its
3299 * processing later.
3300 *
3301 * Return 1 if the message was processed completely and 0 if not.
3302 *
3303 * This routine is called from both ldtermwput and ldtermwsrv to do the
3304 * actual work of dealing with mp. ldtermwput will have already
3305 * dealt with high priority messages.
3306 */
3307 static int
3308 ldtermwmsg(queue_t *q, mblk_t *mp)
3309 {
3310 ldtermstd_state_t *tp;
3311 mblk_t *residmp = NULL;
3312 size_t size;
3313
3314 tp = (ldtermstd_state_t *)q->q_ptr;
3315
3316 switch (mp->b_datap->db_type) {
3317
3318 case M_IOCTL:
3319 ldterm_do_ioctl(q, mp);
3320 break;
3321
3322 case M_DATA:
3323 {
3324 mblk_t *omp = NULL;
3325
3326 if ((tp->t_modes.c_lflag & FLUSHO) &&
3327 (tp->t_modes.c_lflag & IEXTEN)) {
3328 freemsg(mp); /* drop on floor */
3329 break;
3330 }
3331 tp->t_rocount = 0;
3332 /*
3333 * Don't even look at the characters unless
3334 * we have something useful to do with them.
3335 */
3336 if (((tp->t_modes.c_oflag & OPOST) ||
3337 ((tp->t_modes.c_lflag & XCASE) &&
3338 (tp->t_modes.c_lflag & ICANON))) &&
3339 (msgdsize(mp) || !(tp->t_state & TS_ISPTSTTY))) {
3340 unsigned char band = mp->b_band;
3341 short flag = mp->b_flag;
3342
3343 residmp = ldterm_output_msg(q, mp, &omp,
3344 tp, OBSIZE, 0);
3345 if ((mp = omp) == NULL)
3346 break;
3347 mp->b_band |= band;
3348 mp->b_flag |= flag;
3349 }
3350 /* Update sysinfo outch */
3351 (void) drv_setparm(SYSOUTC, msgdsize(mp));
3352 putnext(q, mp);
3353 break;
3354 }
3355
3356 default:
3357 putnext(q, mp); /* pass it through unmolested */
3358 break;
3359 }
3360
3361 if (residmp == NULL)
3362 return (1);
3363
3364 /*
3365 * An allocation failure occurred that prevented the message
3366 * from being completely processed. First, disable our
3367 * queue, since it's pointless to attempt further processing
3368 * until the allocation situation is resolved. (This must
3369 * precede the putbq call below, which would otherwise mark
3370 * the queue to be serviced.)
3371 */
3372 noenable(q);
3373 /*
3374 * Stuff the remnant on our write queue so that we can
3375 * complete it later when times become less lean. Note that
3376 * this sets QFULL, so that our upstream neighbor will be
3377 * blocked by flow control.
3378 */
3379 (void) putbq(q, residmp);
3380 /*
3381 * Schedule a qbufcall to re-enable the queue. The failure
3382 * won't have been for an allocation of more than OBSIZE
3383 * bytes, so don't ask for more than that from bufcall.
3384 */
3385 size = msgdsize(residmp);
3386 if (size > OBSIZE)
3387 size = OBSIZE;
3388 if (tp->t_wbufcid)
3389 qunbufcall(q, tp->t_wbufcid);
3390 tp->t_wbufcid = qbufcall(q, size, BPRI_MED, ldterm_wenable, q);
3391
3392 return (0);
3393 }
3394
3395
3396 /*
3397 * Perform output processing on a message, accumulating the output
3398 * characters in a new message.
3399 */
3400 static mblk_t *
3401 ldterm_output_msg(queue_t *q, mblk_t *imp, mblk_t **omp,
3402 ldtermstd_state_t *tp, size_t bsize, int echoing)
3403 {
3404 mblk_t *ibp; /* block we're examining from input message */
3405 mblk_t *obp; /* block we're filling in output message */
3406 mblk_t *cbp; /* continuation block */
3407 mblk_t *oobp; /* old value of obp; valid if NEW_BLOCK fails */
3408 mblk_t **contpp; /* where to stuff ptr to newly-allocated blk */
3409 unsigned char c, n;
3410 int count, ctype;
3411 ssize_t bytes_left;
3412
3413 mblk_t *bp; /* block to stuff an M_DELAY message in */
3414
3415
3416 /*
3417 * Allocate a new block into which to put bytes. If we can't,
3418 * we just drop the rest of the message on the floor. If x is
3419 * non-zero, just fall thru; failure requires cleanup before
3420 * going out
3421 */
3422
3423 #define NEW_BLOCK(x) \
3424 { \
3425 oobp = obp; \
3426 if ((obp = allocb(bsize, BPRI_MED)) == NULL) { \
3427 if (x == 0) \
3428 goto outofbufs; \
3429 } else { \
3430 *contpp = obp; \
3431 contpp = &obp->b_cont; \
3432 bytes_left = obp->b_datap->db_lim - obp->b_wptr; \
3433 } \
3434 }
3435
3436 ibp = imp;
3437
3438 /*
3439 * When we allocate the first block of a message, we should
3440 * stuff the pointer to it in "*omp". All subsequent blocks
3441 * should have the pointer to them stuffed into the "b_cont"
3442 * field of the previous block. "contpp" points to the place
3443 * where we should stuff the pointer.
3444 *
3445 * If we already have a message we're filling in, continue doing
3446 * so.
3447 */
3448 if ((obp = *omp) != NULL) {
3449 while (obp->b_cont != NULL)
3450 obp = obp->b_cont;
3451 contpp = &obp->b_cont;
3452 bytes_left = obp->b_datap->db_lim - obp->b_wptr;
3453 } else {
3454 contpp = omp;
3455 bytes_left = 0;
3456 }
3457
3458 do {
3459 while (ibp->b_rptr < ibp->b_wptr) {
3460 /*
3461 * Make sure there's room for one more
3462 * character. At most, we'll need "t_maxeuc"
3463 * bytes.
3464 */
3465 if ((bytes_left < (int)tp->t_maxeuc)) {
3466 /* LINTED */
3467 NEW_BLOCK(0);
3468 }
3469 /*
3470 * If doing XCASE processing (not very
3471 * likely, in this day and age), look at each
3472 * character individually.
3473 */
3474 if ((tp->t_modes.c_lflag & XCASE) &&
3475 (tp->t_modes.c_lflag & ICANON)) {
3476 c = *ibp->b_rptr++;
3477
3478 /*
3479 * We need to make sure that this is not
3480 * a following byte of a multibyte character
3481 * before applying an XCASE processing.
3482 *
3483 * tp->t_eucign will be 0 if and only
3484 * if the current 'c' is an ASCII character
3485 * and also a byte. Otherwise, it will have
3486 * the byte length of a multibyte character.
3487 */
3488 if ((tp->t_state & TS_MEUC) &&
3489 tp->t_eucign == 0 && NOTASCII(c)) {
3490 tp->t_eucign =
3491 tp->t_csmethods.ldterm_memwidth(
3492 c, (void *)tp);
3493 tp->t_scratch_len = tp->t_eucign;
3494
3495 if (tp->t_csdata.codeset_type !=
3496 LDTERM_CS_TYPE_UTF8) {
3497 tp->t_col +=
3498 tp->
3499 t_csmethods.
3500 ldterm_dispwidth(c,
3501 (void *)tp,
3502 tp->t_modes.c_lflag &
3503 ECHOCTL);
3504 }
3505 }
3506
3507 /*
3508 * If character is mapped on output,
3509 * put out a backslash followed by
3510 * what it is mapped to.
3511 */
3512 if (tp->t_eucign == 0 && omaptab[c] != 0 &&
3513 (!echoing || c != '\\')) {
3514 /* backslash is an ordinary character */
3515 tp->t_col++;
3516 *obp->b_wptr++ = '\\';
3517 bytes_left--;
3518 if (bytes_left == 0) {
3519 /* LINTED */
3520 NEW_BLOCK(1);
3521 }
3522 /*
3523 * Allocation failed, make
3524 * state consistent before
3525 * returning
3526 */
3527 if (obp == NULL) {
3528 ibp->b_rptr--;
3529 tp->t_col--;
3530 oobp->b_wptr--;
3531 goto outofbufs;
3532 }
3533 c = omaptab[c];
3534 }
3535 /*
3536 * If no other output processing is
3537 * required, push the character into
3538 * the block and get another.
3539 */
3540 if (!(tp->t_modes.c_oflag & OPOST)) {
3541 if (tp->t_eucign > 0) {
3542 --tp->t_eucign;
3543 } else {
3544 tp->t_col++;
3545 }
3546 *obp->b_wptr++ = c;
3547 bytes_left--;
3548 continue;
3549 }
3550 /*
3551 * OPOST output flag is set. Map
3552 * lower case to upper case if OLCUC
3553 * flag is set and the 'c' is a lowercase
3554 * ASCII character.
3555 */
3556 if (tp->t_eucign == 0 &&
3557 (tp->t_modes.c_oflag & OLCUC) &&
3558 c >= 'a' && c <= 'z')
3559 c -= 'a' - 'A';
3560 } else {
3561 /*
3562 * Copy all the ORDINARY characters,
3563 * possibly mapping upper case to
3564 * lower case. We use "movtuc",
3565 * STOPPING when we can't move some
3566 * character. For multi-byte or
3567 * multi-column EUC, we can't depend
3568 * on the regular tables. Rather than
3569 * just drop through to the "big
3570 * switch" for all characters, it
3571 * _might_ be faster to let "movtuc"
3572 * move a bunch of characters.
3573 * Chances are, even in multi-byte
3574 * mode we'll have lots of ASCII
3575 * going through. We check the flag
3576 * once, and call movtuc with the
3577 * appropriate table as an argument.
3578 *
3579 * "movtuc will work for all codeset
3580 * types since it stops at the beginning
3581 * byte of a multibyte character.
3582 */
3583 size_t bytes_to_move;
3584 size_t bytes_moved;
3585
3586 ASSERT(ibp->b_wptr >= ibp->b_rptr);
3587 bytes_to_move = ibp->b_wptr - ibp->b_rptr;
3588 if (bytes_to_move > bytes_left)
3589 bytes_to_move = bytes_left;
3590 if (tp->t_state & TS_MEUC) {
3591 bytes_moved = movtuc(bytes_to_move,
3592 ibp->b_rptr, obp->b_wptr,
3593 (tp->t_modes.c_oflag & OLCUC ?
3594 elcuctab : enotrantab));
3595 } else {
3596 bytes_moved = movtuc(bytes_to_move,
3597 ibp->b_rptr, obp->b_wptr,
3598 (tp->t_modes.c_oflag & OLCUC ?
3599 lcuctab : notrantab));
3600 }
3601 /*
3602 * We're save to just do this column
3603 * calculation, because if TS_MEUC is
3604 * set, we used the proper EUC
3605 * tables, and won't have copied any
3606 * EUC bytes.
3607 */
3608 tp->t_col += bytes_moved;
3609 ibp->b_rptr += bytes_moved;
3610 obp->b_wptr += bytes_moved;
3611 bytes_left -= bytes_moved;
3612 if (ibp->b_rptr >= ibp->b_wptr)
3613 continue; /* moved all of block */
3614 if (bytes_left == 0) {
3615 /* LINTED */
3616 NEW_BLOCK(0);
3617 }
3618 c = *ibp->b_rptr++; /* stopper */
3619 }
3620
3621 /*
3622 * Again, we need to make sure that this is not
3623 * a following byte of a multibyte character at
3624 * here.
3625 *
3626 * 'tp->t_eucign' will be 0 iff the current 'c' is
3627 * an ASCII character. Otherwise, it will have
3628 * the byte length of a multibyte character.
3629 * We also add the display width to 'tp->t_col' if
3630 * the current codeset is not UTF-8 since this is
3631 * a leading byte of a multibyte character.
3632 * For UTF-8 codeset type, we add the display width
3633 * when we get the last byte of a character.
3634 */
3635 if ((tp->t_state & TS_MEUC) && tp->t_eucign == 0 &&
3636 NOTASCII(c)) {
3637 tp->t_eucign = tp->t_csmethods.ldterm_memwidth(
3638 c, (void *)tp);
3639 tp->t_scratch_len = tp->t_eucign;
3640
3641 if (tp->t_csdata.codeset_type !=
3642 LDTERM_CS_TYPE_UTF8) {
3643 tp->t_col +=
3644 tp->t_csmethods.ldterm_dispwidth(c,
3645 (void *)tp,
3646 tp->t_modes.c_lflag & ECHOCTL);
3647 }
3648 }
3649
3650 /*
3651 * If the driver has requested, don't process
3652 * output flags. However, if we're in
3653 * multi-byte mode, we HAVE to look at
3654 * EVERYTHING going out to maintain column
3655 * position properly. Therefore IF the driver
3656 * says don't AND we're not doing multi-byte,
3657 * then don't do it. Otherwise, do it.
3658 *
3659 * NOTE: Hardware USUALLY doesn't expand tabs
3660 * properly for multi-byte situations anyway;
3661 * that's a known problem with the 3B2
3662 * "PORTS" board firmware, and any other
3663 * hardware that doesn't ACTUALLY know about
3664 * the current EUC mapping that WE are using
3665 * at this very moment. The problem is that
3666 * memory width is INDEPENDENT of screen
3667 * width - no relation - so WE know how wide
3668 * the characters are, but an off-the-host
3669 * board probably doesn't. So, until we're
3670 * SURE that the hardware below us can
3671 * correctly expand tabs in a
3672 * multi-byte/multi-column EUC situation, we
3673 * do it ourselves.
3674 */
3675 /*
3676 * Map <CR>to<NL> on output if OCRNL flag
3677 * set. ONLCR processing is not done if OCRNL
3678 * is set.
3679 */
3680 if (c == '\r' && (tp->t_modes.c_oflag & OCRNL)) {
3681 c = '\n';
3682 ctype = typetab[c];
3683 goto jocrnl;
3684 }
3685
3686 if (tp->t_csdata.codeset_type == LDTERM_CS_TYPE_EUC) {
3687 ctype = typetab[c];
3688 } else {
3689 /*
3690 * In other codeset types, we safely assume
3691 * any byte of a multibyte character will have
3692 * 'ORDINARY' type. For ASCII characters, we
3693 * still use the typetab[].
3694 */
3695 if (tp->t_eucign == 0)
3696 ctype = typetab[c];
3697 else
3698 ctype = ORDINARY;
3699 }
3700
3701 /*
3702 * Map <NL> to <CR><NL> on output if ONLCR
3703 * flag is set.
3704 */
3705 if (c == '\n' && (tp->t_modes.c_oflag & ONLCR)) {
3706 if (!(tp->t_state & TS_TTCR)) {
3707 tp->t_state |= TS_TTCR;
3708 c = '\r';
3709 ctype = typetab['\r'];
3710 --ibp->b_rptr;
3711 } else
3712 tp->t_state &= ~TS_TTCR;
3713 }
3714 /*
3715 * Delay values and column position
3716 * calculated here. For EUC chars in
3717 * multi-byte mode, we use "t_eucign" to help
3718 * calculate columns. When we see the first
3719 * byte of an EUC, we set t_eucign to the
3720 * number of bytes that will FOLLOW it, and
3721 * we add the screen width of the WHOLE EUC
3722 * character to the column position. In
3723 * particular, we can't count SS2 or SS3 as
3724 * printing characters. Remember, folks, the
3725 * screen width and memory width are
3726 * independent - no relation. We could have
3727 * dropped through for ASCII, but we want to
3728 * catch any bad characters (i.e., t_eucign
3729 * set and an ASCII char received) and
3730 * possibly report the garbage situation.
3731 */
3732 jocrnl:
3733
3734 count = 0;
3735 switch (ctype) {
3736
3737 case T_SS2:
3738 case T_SS3:
3739 case ORDINARY:
3740 if (tp->t_state & TS_MEUC) {
3741 if (tp->t_eucign) {
3742 *obp->b_wptr++ = c;
3743 bytes_left--;
3744
3745 tp->t_scratch[tp->t_scratch_len
3746 - tp->t_eucign] = c;
3747
3748 --tp->t_eucign;
3749
3750 if (tp->t_csdata.codeset_type
3751 == LDTERM_CS_TYPE_UTF8 &&
3752 tp->t_eucign <= 0) {
3753 tp->t_col +=
3754 ldterm_utf8_width(
3755 tp->t_scratch,
3756 tp->t_scratch_len);
3757 }
3758 } else {
3759 if (tp->t_modes.c_oflag & OLCUC)
3760 n = elcuctab[c];
3761 else
3762 n = enotrantab[c];
3763 if (n)
3764 c = n;
3765 tp->t_col++;
3766 *obp->b_wptr++ = c;
3767 bytes_left--;
3768 }
3769 } else { /* ho hum, ASCII mode... */
3770 if (tp->t_modes.c_oflag & OLCUC)
3771 n = lcuctab[c];
3772 else
3773 n = notrantab[c];
3774 if (n)
3775 c = n;
3776 tp->t_col++;
3777 *obp->b_wptr++ = c;
3778 bytes_left--;
3779 }
3780 break;
3781
3782 /*
3783 * If we're doing ECHOCTL, we've
3784 * already mapped the thing during
3785 * the process of canonising. Don't
3786 * bother here, as it's not one that
3787 * we did.
3788 */
3789 case CONTROL:
3790 *obp->b_wptr++ = c;
3791 bytes_left--;
3792 break;
3793
3794 /*
3795 * This is probably a backspace
3796 * received, not one that we're
3797 * echoing. Let it go as a
3798 * single-column backspace.
3799 */
3800 case BACKSPACE:
3801 if (tp->t_col)
3802 tp->t_col--;
3803 if (tp->t_modes.c_oflag & BSDLY) {
3804 if (tp->t_modes.c_oflag & OFILL)
3805 count = 1;
3806 }
3807 *obp->b_wptr++ = c;
3808 bytes_left--;
3809 break;
3810
3811 case NEWLINE:
3812 if (tp->t_modes.c_oflag & ONLRET)
3813 goto cr;
3814 if ((tp->t_modes.c_oflag & NLDLY) == NL1)
3815 count = 2;
3816 *obp->b_wptr++ = c;
3817 bytes_left--;
3818 break;
3819
3820 case TAB:
3821 /*
3822 * Map '\t' to spaces if XTABS flag
3823 * is set. The calculation of
3824 * "t_eucign" has probably insured
3825 * that column will be correct, as we
3826 * bumped t_col by the DISP width,
3827 * not the memory width.
3828 */
3829 if ((tp->t_modes.c_oflag & TABDLY) == XTABS) {
3830 for (;;) {
3831 *obp->b_wptr++ = ' ';
3832 bytes_left--;
3833 tp->t_col++;
3834 if ((tp->t_col & 07) == 0)
3835 break; /* every 8th */
3836 /*
3837 * If we don't have
3838 * room to fully
3839 * expand this tab in
3840 * this block, back
3841 * up to continue
3842 * expanding it into
3843 * the next block.
3844 */
3845 if (obp->b_wptr >=
3846 obp->b_datap->db_lim) {
3847 ibp->b_rptr--;
3848 break;
3849 }
3850 }
3851 } else {
3852 tp->t_col |= 07;
3853 tp->t_col++;
3854 if (tp->t_modes.c_oflag & OFILL) {
3855 if (tp->t_modes.c_oflag &
3856 TABDLY)
3857 count = 2;
3858 } else {
3859 switch (tp->t_modes.c_oflag &
3860 TABDLY) {
3861 case TAB2:
3862 count = 6;
3863 break;
3864
3865 case TAB1:
3866 count = 1 + (tp->t_col |
3867 ~07);
3868 if (count < 5)
3869 count = 0;
3870 break;
3871 }
3872 }
3873 *obp->b_wptr++ = c;
3874 bytes_left--;
3875 }
3876 break;
3877
3878 case VTAB:
3879 if ((tp->t_modes.c_oflag & VTDLY) &&
3880 !(tp->t_modes.c_oflag & OFILL))
3881 count = 127;
3882 *obp->b_wptr++ = c;
3883 bytes_left--;
3884 break;
3885
3886 case RETURN:
3887 /*
3888 * Ignore <CR> in column 0 if ONOCR
3889 * flag set.
3890 */
3891 if (tp->t_col == 0 &&
3892 (tp->t_modes.c_oflag & ONOCR))
3893 break;
3894
3895 cr:
3896 switch (tp->t_modes.c_oflag & CRDLY) {
3897
3898 case CR1:
3899 if (tp->t_modes.c_oflag & OFILL)
3900 count = 2;
3901 else
3902 count = tp->t_col % 2;
3903 break;
3904
3905 case CR2:
3906 if (tp->t_modes.c_oflag & OFILL)
3907 count = 4;
3908 else
3909 count = 6;
3910 break;
3911
3912 case CR3:
3913 if (tp->t_modes.c_oflag & OFILL)
3914 count = 0;
3915 else
3916 count = 9;
3917 break;
3918 }
3919 tp->t_col = 0;
3920 *obp->b_wptr++ = c;
3921 bytes_left--;
3922 break;
3923 }
3924
3925 if (count != 0) {
3926 if (tp->t_modes.c_oflag & OFILL) {
3927 do {
3928 if (bytes_left == 0) {
3929 /* LINTED */
3930 NEW_BLOCK(0);
3931 }
3932 if (tp->t_modes.c_oflag & OFDEL)
3933 *obp->b_wptr++ = CDEL;
3934 else
3935 *obp->b_wptr++ = CNUL;
3936 bytes_left--;
3937 } while (--count != 0);
3938 } else {
3939 if ((tp->t_modes.c_lflag & FLUSHO) &&
3940 (tp->t_modes.c_lflag & IEXTEN)) {
3941 /* drop on floor */
3942 freemsg(*omp);
3943 } else {
3944 /*
3945 * Update sysinfo
3946 * outch
3947 */
3948 (void) drv_setparm(SYSOUTC,
3949 msgdsize(*omp));
3950 putnext(q, *omp);
3951 /*
3952 * Send M_DELAY
3953 * downstream
3954 */
3955 if ((bp =
3956 allocb(1, BPRI_MED)) !=
3957 NULL) {
3958 bp->b_datap->db_type =
3959 M_DELAY;
3960 *bp->b_wptr++ =
3961 (uchar_t)count;
3962 putnext(q, bp);
3963 }
3964 }
3965 bytes_left = 0;
3966 /*
3967 * We have to start a new
3968 * message; the delay
3969 * introduces a break between
3970 * messages.
3971 */
3972 *omp = NULL;
3973 contpp = omp;
3974 }
3975 }
3976 }
3977 cbp = ibp->b_cont;
3978 freeb(ibp);
3979 } while ((ibp = cbp) != NULL); /* next block, if any */
3980
3981 outofbufs:
3982 return (ibp);
3983 #undef NEW_BLOCK
3984 }
3985
3986
3987 #if !defined(__sparc)
3988 int
3989 movtuc(size_t size, unsigned char *from, unsigned char *origto,
3990 unsigned char *table)
3991 {
3992 unsigned char *to = origto;
3993 unsigned char c;
3994
3995 while (size != 0 && (c = table[*from++]) != 0) {
3996 *to++ = c;
3997 size--;
3998 }
3999 return (to - origto);
4000 }
4001 #endif
4002
4003 static void
4004 ldterm_flush_output(uchar_t c, queue_t *q, ldtermstd_state_t *tp)
4005 {
4006 /* Already conditioned with IEXTEN during VDISCARD processing */
4007 if (tp->t_modes.c_lflag & FLUSHO)
4008 tp->t_modes.c_lflag &= ~FLUSHO;
4009 else {
4010 flushq(q, FLUSHDATA); /* flush our write queue */
4011 /* flush ones below us */
4012 (void) putnextctl1(q, M_FLUSH, FLUSHW);
4013 if ((tp->t_echomp = allocb(EBSIZE, BPRI_HI)) != NULL) {
4014 (void) ldterm_echo(c, q, 1, tp);
4015 if (tp->t_msglen != 0)
4016 ldterm_reprint(q, EBSIZE, tp);
4017 if (tp->t_echomp != NULL) {
4018 putnext(q, tp->t_echomp);
4019 tp->t_echomp = NULL;
4020 }
4021 }
4022 tp->t_modes.c_lflag |= FLUSHO;
4023 }
4024 }
4025
4026
4027 /*
4028 * Signal generated by the reader: M_PCSIG and M_FLUSH messages sent.
4029 */
4030 static void
4031 ldterm_dosig(queue_t *q, int sig, uchar_t c, int mtype, int mode)
4032 {
4033 ldtermstd_state_t *tp = (ldtermstd_state_t *)q->q_ptr;
4034 int sndsig = 0;
4035
4036 /*
4037 * c == \0 is brk case; need to flush on BRKINT even if
4038 * noflsh is set.
4039 */
4040 if ((!(tp->t_modes.c_lflag & NOFLSH)) || (c == '\0')) {
4041 if (mode) {
4042 if (tp->t_state & TS_TTSTOP) {
4043 sndsig = 1;
4044 (void) putnextctl1(q, mtype, sig);
4045 }
4046 /*
4047 * Flush read or write side.
4048 * Restart the input or output.
4049 */
4050 if (mode & FLUSHR) {
4051 flushq(q, FLUSHDATA);
4052 (void) putnextctl1(WR(q), M_FLUSH, mode);
4053 if (tp->t_state & (TS_TBLOCK|TS_IFBLOCK)) {
4054 (void) putnextctl(WR(q), M_STARTI);
4055 tp->t_state &= ~(TS_TBLOCK|TS_IFBLOCK);
4056 }
4057 }
4058 if (mode & FLUSHW) {
4059 flushq(WR(q), FLUSHDATA);
4060 /*
4061 * XXX This is extremely gross.
4062 * Since we can't be sure our M_FLUSH
4063 * will have run its course by the
4064 * time we do the echo below, we set
4065 * state and toss it in the write put
4066 * routine to prevent flushing our
4067 * own data. Note that downstream
4068 * modules on the write side will be
4069 * flushed by the M_FLUSH sent above.
4070 */
4071 tp->t_state |= TS_FLUSHWAIT;
4072 (void) putnextctl1(q, M_FLUSH, FLUSHW);
4073 if (tp->t_state & TS_TTSTOP) {
4074 (void) putnextctl(WR(q), M_START);
4075 tp->t_state &= ~(TS_TTSTOP|TS_OFBLOCK);
4076 }
4077 }
4078 }
4079 }
4080 tp->t_state &= ~TS_QUOT;
4081 if (sndsig == 0)
4082 (void) putnextctl1(q, mtype, sig);
4083
4084 if (c != '\0') {
4085 if ((tp->t_echomp = allocb(4, BPRI_HI)) != NULL) {
4086 if (ldterm_echo(c, WR(q), 4, tp) > 0)
4087 putnext(WR(q), tp->t_echomp);
4088 else
4089 freemsg(tp->t_echomp);
4090 tp->t_echomp = NULL;
4091 }
4092 }
4093 }
4094
4095
4096 /*
4097 * Called when an M_IOCTL message is seen on the write queue; does
4098 * whatever we're supposed to do with it, and either replies
4099 * immediately or passes it to the next module down.
4100 */
4101 static void
4102 ldterm_do_ioctl(queue_t *q, mblk_t *mp)
4103 {
4104 ldtermstd_state_t *tp;
4105 struct iocblk *iocp;
4106 struct eucioc *euciocp; /* needed for EUC ioctls */
4107 ldterm_cs_data_user_t *csdp;
4108 int i;
4109 int locale_name_sz;
4110 uchar_t maxbytelen;
4111 uchar_t maxscreenlen;
4112 int error;
4113
4114 iocp = (struct iocblk *)mp->b_rptr;
4115 tp = (ldtermstd_state_t *)q->q_ptr;
4116
4117 switch (iocp->ioc_cmd) {
4118
4119 case TCSETS:
4120 case TCSETSW:
4121 case TCSETSF:
4122 {
4123 /*
4124 * Set current parameters and special
4125 * characters.
4126 */
4127 struct termios *cb;
4128 struct termios oldmodes;
4129
4130 error = miocpullup(mp, sizeof (struct termios));
4131 if (error != 0) {
4132 miocnak(q, mp, 0, error);
4133 return;
4134 }
4135
4136 cb = (struct termios *)mp->b_cont->b_rptr;
4137
4138 oldmodes = tp->t_amodes;
4139 tp->t_amodes = *cb;
4140 if ((tp->t_amodes.c_lflag & PENDIN) &&
4141 (tp->t_modes.c_lflag & IEXTEN)) {
4142 /*
4143 * Yuk. The C shell file completion
4144 * code actually uses this "feature",
4145 * so we have to support it.
4146 */
4147 if (tp->t_message != NULL) {
4148 tp->t_state |= TS_RESCAN;
4149 qenable(RD(q));
4150 }
4151 tp->t_amodes.c_lflag &= ~PENDIN;
4152 }
4153 bcopy(tp->t_amodes.c_cc, tp->t_modes.c_cc, NCCS);
4154
4155 /*
4156 * ldterm_adjust_modes does not deal with
4157 * cflags
4158 */
4159 tp->t_modes.c_cflag = tp->t_amodes.c_cflag;
4160
4161 ldterm_adjust_modes(tp);
4162 if (chgstropts(&oldmodes, tp, RD(q)) == (-1)) {
4163 miocnak(q, mp, 0, EAGAIN);
4164 return;
4165 }
4166 /*
4167 * The driver may want to know about the
4168 * following iflags: IGNBRK, BRKINT, IGNPAR,
4169 * PARMRK, INPCK, IXON, IXANY.
4170 */
4171 break;
4172 }
4173
4174 case TCSETA:
4175 case TCSETAW:
4176 case TCSETAF:
4177 {
4178 /*
4179 * Old-style "ioctl" to set current
4180 * parameters and special characters. Don't
4181 * clear out the unset portions, leave them
4182 * as they are.
4183 */
4184 struct termio *cb;
4185 struct termios oldmodes;
4186
4187 error = miocpullup(mp, sizeof (struct termio));
4188 if (error != 0) {
4189 miocnak(q, mp, 0, error);
4190 return;
4191 }
4192
4193 cb = (struct termio *)mp->b_cont->b_rptr;
4194
4195 oldmodes = tp->t_amodes;
4196 tp->t_amodes.c_iflag =
4197 (tp->t_amodes.c_iflag & 0xffff0000 | cb->c_iflag);
4198 tp->t_amodes.c_oflag =
4199 (tp->t_amodes.c_oflag & 0xffff0000 | cb->c_oflag);
4200 tp->t_amodes.c_cflag =
4201 (tp->t_amodes.c_cflag & 0xffff0000 | cb->c_cflag);
4202 tp->t_amodes.c_lflag =
4203 (tp->t_amodes.c_lflag & 0xffff0000 | cb->c_lflag);
4204
4205 bcopy(cb->c_cc, tp->t_modes.c_cc, NCC);
4206 /* TCGETS returns amodes, so update that too */
4207 bcopy(cb->c_cc, tp->t_amodes.c_cc, NCC);
4208
4209 /* ldterm_adjust_modes does not deal with cflags */
4210
4211 tp->t_modes.c_cflag = tp->t_amodes.c_cflag;
4212
4213 ldterm_adjust_modes(tp);
4214 if (chgstropts(&oldmodes, tp, RD(q)) == (-1)) {
4215 miocnak(q, mp, 0, EAGAIN);
4216 return;
4217 }
4218 /*
4219 * The driver may want to know about the
4220 * following iflags: IGNBRK, BRKINT, IGNPAR,
4221 * PARMRK, INPCK, IXON, IXANY.
4222 */
4223 break;
4224 }
4225
4226 case TCFLSH:
4227 /*
4228 * Do the flush on the write queue immediately, and
4229 * queue up any flush on the read queue for the
4230 * service procedure to see. Then turn it into the
4231 * appropriate M_FLUSH message, so that the module
4232 * below us doesn't have to know about TCFLSH.
4233 */
4234 error = miocpullup(mp, sizeof (int));
4235 if (error != 0) {
4236 miocnak(q, mp, 0, error);
4237 return;
4238 }
4239
4240 ASSERT(mp->b_datap != NULL);
4241 if (*(int *)mp->b_cont->b_rptr == 0) {
4242 ASSERT(mp->b_datap != NULL);
4243 (void) putnextctl1(q, M_FLUSH, FLUSHR);
4244 (void) putctl1(RD(q), M_FLUSH, FLUSHR);
4245 } else if (*(int *)mp->b_cont->b_rptr == 1) {
4246 flushq(q, FLUSHDATA);
4247 ASSERT(mp->b_datap != NULL);
4248 tp->t_state |= TS_FLUSHWAIT;
4249 (void) putnextctl1(RD(q), M_FLUSH, FLUSHW);
4250 (void) putnextctl1(q, M_FLUSH, FLUSHW);
4251 } else if (*(int *)mp->b_cont->b_rptr == 2) {
4252 flushq(q, FLUSHDATA);
4253 ASSERT(mp->b_datap != NULL);
4254 (void) putnextctl1(q, M_FLUSH, FLUSHRW);
4255 tp->t_state |= TS_FLUSHWAIT;
4256 (void) putnextctl1(RD(q), M_FLUSH, FLUSHRW);
4257 } else {
4258 miocnak(q, mp, 0, EINVAL);
4259 return;
4260 }
4261 ASSERT(mp->b_datap != NULL);
4262 iocp->ioc_rval = 0;
4263 miocack(q, mp, 0, 0);
4264 return;
4265
4266 case TCXONC:
4267 error = miocpullup(mp, sizeof (int));
4268 if (error != 0) {
4269 miocnak(q, mp, 0, error);
4270 return;
4271 }
4272
4273 switch (*(int *)mp->b_cont->b_rptr) {
4274 case 0:
4275 if (!(tp->t_state & TS_TTSTOP)) {
4276 (void) putnextctl(q, M_STOP);
4277 tp->t_state |= (TS_TTSTOP|TS_OFBLOCK);
4278 }
4279 break;
4280
4281 case 1:
4282 if (tp->t_state & TS_TTSTOP) {
4283 (void) putnextctl(q, M_START);
4284 tp->t_state &= ~(TS_TTSTOP|TS_OFBLOCK);
4285 }
4286 break;
4287
4288 case 2:
4289 (void) putnextctl(q, M_STOPI);
4290 tp->t_state |= (TS_TBLOCK|TS_IFBLOCK);
4291 break;
4292
4293 case 3:
4294 (void) putnextctl(q, M_STARTI);
4295 tp->t_state &= ~(TS_TBLOCK|TS_IFBLOCK);
4296 break;
4297
4298 default:
4299 miocnak(q, mp, 0, EINVAL);
4300 return;
4301 }
4302 ASSERT(mp->b_datap != NULL);
4303 iocp->ioc_rval = 0;
4304 miocack(q, mp, 0, 0);
4305 return;
4306 /*
4307 * TCSBRK is expected to be handled by the driver.
4308 * The reason its left for the driver is that when
4309 * the argument to TCSBRK is zero driver has to drain
4310 * the data and sending a M_IOCACK from LDTERM before
4311 * the driver drains the data is going to cause
4312 * problems.
4313 */
4314
4315 /*
4316 * The following are EUC related ioctls. For
4317 * EUC_WSET, we have to pass the information on, even
4318 * though we ACK the call. It's vital in the EUC
4319 * environment that everybody downstream knows about
4320 * the EUC codeset widths currently in use; we
4321 * therefore pass down the information in an M_CTL
4322 * message. It will bottom out in the driver.
4323 */
4324 case EUC_WSET:
4325 {
4326
4327 /* only needed for EUC_WSET */
4328 struct iocblk *riocp;
4329
4330 mblk_t *dmp, *dmp_cont;
4331
4332 /*
4333 * If the user didn't supply any information,
4334 * NAK it.
4335 */
4336 error = miocpullup(mp, sizeof (struct eucioc));
4337 if (error != 0) {
4338 miocnak(q, mp, 0, error);
4339 return;
4340 }
4341
4342 euciocp = (struct eucioc *)mp->b_cont->b_rptr;
4343 /*
4344 * Check here for something reasonable. If
4345 * anything will take more than EUC_MAXW
4346 * columns or more than EUC_MAXW bytes
4347 * following SS2 or SS3, then just reject it
4348 * out of hand. It's not impossible for us to
4349 * do it, it just isn't reasonable. So far,
4350 * in the world, we've seen the absolute max
4351 * columns to be 2 and the max number of
4352 * bytes to be 3. This allows room for some
4353 * expansion of that, but it probably won't
4354 * even be necessary. At the moment, we
4355 * return a "range" error. If you really
4356 * need to, you can push EUC_MAXW up to over
4357 * 200; it doesn't make sense, though, with
4358 * only a CANBSIZ sized input limit (usually
4359 * 256)!
4360 */
4361 for (i = 0; i < 4; i++) {
4362 if ((euciocp->eucw[i] > EUC_MAXW) ||
4363 (euciocp->scrw[i] > EUC_MAXW)) {
4364 miocnak(q, mp, 0, ERANGE);
4365 return;
4366 }
4367 }
4368 /*
4369 * Otherwise, save the information in tp,
4370 * force codeset 0 (ASCII) to be one byte,
4371 * one column.
4372 */
4373 cp_eucwioc(euciocp, &tp->eucwioc, EUCIN);
4374 tp->eucwioc.eucw[0] = tp->eucwioc.scrw[0] = 1;
4375 /*
4376 * Now, check out whether we're doing
4377 * multibyte processing. if we are, we need
4378 * to allocate a block to hold the parallel
4379 * array. By convention, we've been passed
4380 * what amounts to a CSWIDTH definition. We
4381 * actually NEED the number of bytes for
4382 * Codesets 2 & 3.
4383 */
4384 tp->t_maxeuc = 0; /* reset to say we're NOT */
4385
4386 tp->t_state &= ~TS_MEUC;
4387 /*
4388 * We'll set TS_MEUC if we're doing
4389 * multi-column OR multi- byte OR both. It
4390 * makes things easier... NOTE: If we fail
4391 * to get the buffer we need to hold display
4392 * widths, then DON'T let the TS_MEUC bit get
4393 * set!
4394 */
4395 for (i = 0; i < 4; i++) {
4396 if (tp->eucwioc.eucw[i] > tp->t_maxeuc)
4397 tp->t_maxeuc = tp->eucwioc.eucw[i];
4398 if (tp->eucwioc.scrw[i] > 1)
4399 tp->t_state |= TS_MEUC;
4400 }
4401 if ((tp->t_maxeuc > 1) || (tp->t_state & TS_MEUC)) {
4402 if (!tp->t_eucp_mp) {
4403 if ((tp->t_eucp_mp = allocb(_TTY_BUFSIZ,
4404 BPRI_HI)) == NULL) {
4405 tp->t_maxeuc = 1;
4406 tp->t_state &= ~TS_MEUC;
4407 cmn_err(CE_WARN,
4408 "Can't allocate eucp_mp");
4409 miocnak(q, mp, 0, ENOSR);
4410 return;
4411 }
4412 /*
4413 * here, if there's junk in
4414 * the canonical buffer, then
4415 * move the eucp pointer past
4416 * it, so we don't run off
4417 * the beginning. This is a
4418 * total botch, but will
4419 * hopefully keep stuff from
4420 * getting too messed up
4421 * until the user flushes
4422 * this line!
4423 */
4424 if (tp->t_msglen) {
4425 tp->t_eucp =
4426 tp->t_eucp_mp->b_rptr;
4427 for (i = tp->t_msglen; i; i--)
4428 *tp->t_eucp++ = 1;
4429 } else {
4430 tp->t_eucp =
4431 tp->t_eucp_mp->b_rptr;
4432 }
4433 }
4434 /* doing multi-byte handling */
4435 tp->t_state |= TS_MEUC;
4436
4437 } else if (tp->t_eucp_mp) {
4438 freemsg(tp->t_eucp_mp);
4439 tp->t_eucp_mp = NULL;
4440 tp->t_eucp = NULL;
4441 }
4442
4443 /*
4444 * Save the EUC width data we have at
4445 * the t_csdata, set t_csdata.codeset_type to
4446 * EUC one, and, switch the codeset methods at
4447 * t_csmethods.
4448 */
4449 bzero(&tp->t_csdata.eucpc_data,
4450 (sizeof (ldterm_eucpc_data_t) *
4451 LDTERM_CS_MAX_CODESETS));
4452 tp->t_csdata.eucpc_data[0].byte_length =
4453 tp->eucwioc.eucw[1];
4454 tp->t_csdata.eucpc_data[0].screen_width =
4455 tp->eucwioc.scrw[1];
4456 tp->t_csdata.eucpc_data[1].byte_length =
4457 tp->eucwioc.eucw[2];
4458 tp->t_csdata.eucpc_data[1].screen_width =
4459 tp->eucwioc.scrw[2];
4460 tp->t_csdata.eucpc_data[2].byte_length =
4461 tp->eucwioc.eucw[3];
4462 tp->t_csdata.eucpc_data[2].screen_width =
4463 tp->eucwioc.scrw[3];
4464 tp->t_csdata.version = LDTERM_DATA_VERSION;
4465 tp->t_csdata.codeset_type = LDTERM_CS_TYPE_EUC;
4466 /*
4467 * We are not using the 'csinfo_num' anyway if the
4468 * current codeset type is EUC. So, set it to
4469 * the maximum possible.
4470 */
4471 tp->t_csdata.csinfo_num =
4472 LDTERM_CS_TYPE_EUC_MAX_SUBCS;
4473 if (tp->t_csdata.locale_name != (char *)NULL) {
4474 kmem_free(tp->t_csdata.locale_name,
4475 strlen(tp->t_csdata.locale_name) + 1);
4476 tp->t_csdata.locale_name = (char *)NULL;
4477 }
4478 tp->t_csmethods = cs_methods[LDTERM_CS_TYPE_EUC];
4479
4480 /*
4481 * If we are able to allocate two blocks (the
4482 * iocblk and the associated data), then pass
4483 * it downstream, otherwise we'll need to NAK
4484 * it, and drop whatever we WERE able to
4485 * allocate.
4486 */
4487 if ((dmp = mkiocb(EUC_WSET)) == NULL) {
4488 miocnak(q, mp, 0, ENOSR);
4489 return;
4490 }
4491 if ((dmp_cont = allocb(EUCSIZE, BPRI_HI)) == NULL) {
4492 freemsg(dmp);
4493 miocnak(q, mp, 0, ENOSR);
4494 return;
4495 }
4496
4497 /*
4498 * We got both buffers. Copy out the EUC
4499 * information (as we received it, not what
4500 * we're using!) & pass it on.
4501 */
4502 bcopy(mp->b_cont->b_rptr, dmp_cont->b_rptr, EUCSIZE);
4503 dmp_cont->b_wptr += EUCSIZE;
4504 dmp->b_cont = dmp_cont;
4505 dmp->b_datap->db_type = M_CTL;
4506 dmp_cont->b_datap->db_type = M_DATA;
4507 riocp = (struct iocblk *)dmp->b_rptr;
4508 riocp->ioc_count = EUCSIZE;
4509 putnext(q, dmp);
4510
4511 /*
4512 * Now ACK the ioctl.
4513 */
4514 iocp->ioc_rval = 0;
4515 miocack(q, mp, 0, 0);
4516 return;
4517 }
4518
4519 case EUC_WGET:
4520 error = miocpullup(mp, sizeof (struct eucioc));
4521 if (error != 0) {
4522 miocnak(q, mp, 0, error);
4523 return;
4524 }
4525 euciocp = (struct eucioc *)mp->b_cont->b_rptr;
4526 cp_eucwioc(&tp->eucwioc, euciocp, EUCOUT);
4527 iocp->ioc_rval = 0;
4528 miocack(q, mp, EUCSIZE, 0);
4529 return;
4530
4531 case CSDATA_SET:
4532 error = miocpullup(mp, sizeof (ldterm_cs_data_user_t));
4533 if (error != 0) {
4534 miocnak(q, mp, 0, error);
4535 return;
4536 }
4537
4538 csdp = (ldterm_cs_data_user_t *)mp->b_cont->b_rptr;
4539
4540 /* Validate the codeset data provided. */
4541 if (csdp->version > LDTERM_DATA_VERSION ||
4542 csdp->codeset_type < LDTERM_CS_TYPE_MIN ||
4543 csdp->codeset_type > LDTERM_CS_TYPE_MAX) {
4544 miocnak(q, mp, 0, ERANGE);
4545 return;
4546 }
4547
4548 if ((csdp->codeset_type == LDTERM_CS_TYPE_EUC &&
4549 csdp->csinfo_num > LDTERM_CS_TYPE_EUC_MAX_SUBCS) ||
4550 (csdp->codeset_type == LDTERM_CS_TYPE_PCCS &&
4551 (csdp->csinfo_num < LDTERM_CS_TYPE_PCCS_MIN_SUBCS ||
4552 csdp->csinfo_num > LDTERM_CS_TYPE_PCCS_MAX_SUBCS))) {
4553 miocnak(q, mp, 0, ERANGE);
4554 return;
4555 }
4556
4557 maxbytelen = maxscreenlen = 0;
4558 if (csdp->codeset_type == LDTERM_CS_TYPE_EUC) {
4559 for (i = 0; i < LDTERM_CS_TYPE_EUC_MAX_SUBCS; i++) {
4560 if (csdp->eucpc_data[i].byte_length >
4561 EUC_MAXW ||
4562 csdp->eucpc_data[i].screen_width >
4563 EUC_MAXW) {
4564 miocnak(q, mp, 0, ERANGE);
4565 return;
4566 }
4567
4568 if (csdp->eucpc_data[i].byte_length >
4569 maxbytelen)
4570 maxbytelen =
4571 csdp->eucpc_data[i].byte_length;
4572 if (csdp->eucpc_data[i].screen_width >
4573 maxscreenlen)
4574 maxscreenlen =
4575 csdp->eucpc_data[i].screen_width;
4576 }
4577 /* POSIX/C locale? */
4578 if (maxbytelen == 0 && maxscreenlen == 0)
4579 maxbytelen = maxscreenlen = 1;
4580 } else if (csdp->codeset_type == LDTERM_CS_TYPE_PCCS) {
4581 for (i = 0; i < LDTERM_CS_MAX_CODESETS; i++) {
4582 if (csdp->eucpc_data[i].byte_length >
4583 LDTERM_CS_MAX_BYTE_LENGTH) {
4584 miocnak(q, mp, 0, ERANGE);
4585 return;
4586 }
4587 if (csdp->eucpc_data[i].byte_length >
4588 maxbytelen)
4589 maxbytelen =
4590 csdp->eucpc_data[i].byte_length;
4591 if (csdp->eucpc_data[i].screen_width >
4592 maxscreenlen)
4593 maxscreenlen =
4594 csdp->eucpc_data[i].screen_width;
4595 }
4596 } else if (csdp->codeset_type == LDTERM_CS_TYPE_UTF8) {
4597 maxbytelen = 4;
4598 maxscreenlen = 2;
4599 }
4600
4601 locale_name_sz = 0;
4602 if (csdp->locale_name) {
4603 for (i = 0; i < MAXNAMELEN; i++)
4604 if (csdp->locale_name[i] == '\0')
4605 break;
4606 /*
4607 * We cannot have any string that is not NULL byte
4608 * terminated.
4609 */
4610 if (i >= MAXNAMELEN) {
4611 miocnak(q, mp, 0, ERANGE);
4612 return;
4613 }
4614
4615 locale_name_sz = i + 1;
4616 }
4617
4618 /*
4619 * As the final check, if there was invalid codeset_type
4620 * given, or invalid byte_length was specified, it's an error.
4621 */
4622 if (maxbytelen <= 0 || maxscreenlen <= 0) {
4623 miocnak(q, mp, 0, ERANGE);
4624 return;
4625 }
4626
4627 /* Do the switching. */
4628 tp->t_maxeuc = maxbytelen;
4629 tp->t_state &= ~TS_MEUC;
4630 if (maxbytelen > 1 || maxscreenlen > 1) {
4631 if (!tp->t_eucp_mp) {
4632 if (!(tp->t_eucp_mp = allocb(_TTY_BUFSIZ,
4633 BPRI_HI))) {
4634 cmn_err(CE_WARN,
4635 "Can't allocate eucp_mp");
4636 miocnak(q, mp, 0, ENOSR);
4637 return;
4638 }
4639 /*
4640 * If there's junk in the canonical buffer,
4641 * then move the eucp pointer past it,
4642 * so we don't run off the beginning. This is
4643 * a total botch, but will hopefully keep
4644 * stuff from getting too messed up until
4645 * the user flushes this line!
4646 */
4647 if (tp->t_msglen) {
4648 tp->t_eucp = tp->t_eucp_mp->b_rptr;
4649 for (i = tp->t_msglen; i; i--)
4650 *tp->t_eucp++ = 1;
4651 } else {
4652 tp->t_eucp = tp->t_eucp_mp->b_rptr;
4653 }
4654 }
4655
4656 /*
4657 * We only set TS_MEUC for a multibyte/multi-column
4658 * codeset.
4659 */
4660 tp->t_state |= TS_MEUC;
4661
4662 tp->t_csdata.version = csdp->version;
4663 tp->t_csdata.codeset_type = csdp->codeset_type;
4664 tp->t_csdata.csinfo_num = csdp->csinfo_num;
4665 bcopy(csdp->eucpc_data, tp->t_csdata.eucpc_data,
4666 sizeof (ldterm_eucpc_data_t) *
4667 LDTERM_CS_MAX_CODESETS);
4668 tp->t_csmethods = cs_methods[csdp->codeset_type];
4669
4670 if (csdp->codeset_type == LDTERM_CS_TYPE_EUC) {
4671 tp->eucwioc.eucw[0] = 1;
4672 tp->eucwioc.scrw[0] = 1;
4673
4674 tp->eucwioc.eucw[1] =
4675 csdp->eucpc_data[0].byte_length;
4676 tp->eucwioc.scrw[1] =
4677 csdp->eucpc_data[0].screen_width;
4678
4679 tp->eucwioc.eucw[2] =
4680 csdp->eucpc_data[1].byte_length + 1;
4681 tp->eucwioc.scrw[2] =
4682 csdp->eucpc_data[1].screen_width;
4683
4684 tp->eucwioc.eucw[3] =
4685 csdp->eucpc_data[2].byte_length + 1;
4686 tp->eucwioc.scrw[3] =
4687 csdp->eucpc_data[2].screen_width;
4688 } else {
4689 /*
4690 * We are not going to use this data
4691 * structure. So, clear it. Also, stty(1) will
4692 * make use of the cleared tp->eucwioc when
4693 * it prints out codeset width setting.
4694 */
4695 bzero(&tp->eucwioc, EUCSIZE);
4696 }
4697 } else {
4698 /*
4699 * If this codeset is a single byte codeset that
4700 * requires only single display column for all
4701 * characters, we switch to default EUC codeset
4702 * methods and data setting.
4703 */
4704
4705 if (tp->t_eucp_mp) {
4706 freemsg(tp->t_eucp_mp);
4707 tp->t_eucp_mp = NULL;
4708 tp->t_eucp = NULL;
4709 }
4710
4711 bzero(&tp->eucwioc, EUCSIZE);
4712 tp->eucwioc.eucw[0] = 1;
4713 tp->eucwioc.scrw[0] = 1;
4714 if (tp->t_csdata.locale_name != (char *)NULL) {
4715 kmem_free(tp->t_csdata.locale_name,
4716 strlen(tp->t_csdata.locale_name) + 1);
4717 }
4718 tp->t_csdata = default_cs_data;
4719 tp->t_csmethods = cs_methods[LDTERM_CS_TYPE_EUC];
4720 }
4721
4722 /* Copy over locale_name. */
4723 if (tp->t_csdata.locale_name != (char *)NULL) {
4724 kmem_free(tp->t_csdata.locale_name,
4725 strlen(tp->t_csdata.locale_name) + 1);
4726 }
4727 if (locale_name_sz > 1) {
4728 tp->t_csdata.locale_name = (char *)kmem_alloc(
4729 locale_name_sz, KM_SLEEP);
4730 (void) strcpy(tp->t_csdata.locale_name,
4731 csdp->locale_name);
4732 } else {
4733 tp->t_csdata.locale_name = (char *)NULL;
4734 }
4735
4736 /*
4737 * Now ACK the ioctl.
4738 */
4739 iocp->ioc_rval = 0;
4740 miocack(q, mp, 0, 0);
4741 return;
4742
4743 case CSDATA_GET:
4744 error = miocpullup(mp, sizeof (ldterm_cs_data_user_t));
4745 if (error != 0) {
4746 miocnak(q, mp, 0, error);
4747 return;
4748 }
4749
4750 csdp = (ldterm_cs_data_user_t *)mp->b_cont->b_rptr;
4751
4752 csdp->version = tp->t_csdata.version;
4753 csdp->codeset_type = tp->t_csdata.codeset_type;
4754 csdp->csinfo_num = tp->t_csdata.csinfo_num;
4755 csdp->pad = tp->t_csdata.pad;
4756 if (tp->t_csdata.locale_name) {
4757 (void) strcpy(csdp->locale_name,
4758 tp->t_csdata.locale_name);
4759 } else {
4760 csdp->locale_name[0] = '\0';
4761 }
4762 bcopy(tp->t_csdata.eucpc_data, csdp->eucpc_data,
4763 sizeof (ldterm_eucpc_data_t) * LDTERM_CS_MAX_CODESETS);
4764 /*
4765 * If the codeset is an EUC codeset and if it has 2nd and/or
4766 * 3rd supplementary codesets, we subtract one from each
4767 * byte length of the supplementary codesets. This is
4768 * because single shift characters, SS2 and SS3, are not
4769 * included in the byte lengths in the user space.
4770 */
4771 if (csdp->codeset_type == LDTERM_CS_TYPE_EUC) {
4772 if (csdp->eucpc_data[1].byte_length)
4773 csdp->eucpc_data[1].byte_length -= 1;
4774 if (csdp->eucpc_data[2].byte_length)
4775 csdp->eucpc_data[2].byte_length -= 1;
4776 }
4777 iocp->ioc_rval = 0;
4778 miocack(q, mp, sizeof (ldterm_cs_data_user_t), 0);
4779 return;
4780
4781 case PTSSTTY:
4782 tp->t_state |= TS_ISPTSTTY;
4783 break;
4784
4785 }
4786
4787 putnext(q, mp);
4788 }
4789
4790
4791 /*
4792 * Send an M_SETOPTS message upstream if any mode changes are being
4793 * made that affect the stream head options. returns -1 if allocb
4794 * fails, else returns 0.
4795 */
4796 static int
4797 chgstropts(struct termios *oldmodep, ldtermstd_state_t *tp, queue_t *q)
4798 {
4799 struct stroptions optbuf;
4800 mblk_t *bp;
4801
4802 optbuf.so_flags = 0;
4803 if ((oldmodep->c_lflag ^ tp->t_modes.c_lflag) & ICANON) {
4804 /*
4805 * Canonical mode is changing state; switch the
4806 * stream head to message-nondiscard or byte-stream
4807 * mode. Also, rerun the service procedure so it can
4808 * change its mind about whether to send data
4809 * upstream or not.
4810 */
4811 if (tp->t_modes.c_lflag & ICANON) {
4812 DEBUG4(("CHANGING TO CANON MODE\n"));
4813 optbuf.so_flags = SO_READOPT|SO_MREADOFF;
4814 optbuf.so_readopt = RMSGN;
4815
4816 /*
4817 * if there is a pending raw mode timeout,
4818 * clear it
4819 */
4820
4821 /*
4822 * Clear VMIN/VTIME state, cancel timers
4823 */
4824 vmin_satisfied(q, tp, 0);
4825 } else {
4826 DEBUG4(("CHANGING TO RAW MODE\n"));
4827 optbuf.so_flags = SO_READOPT|SO_MREADON;
4828 optbuf.so_readopt = RNORM;
4829 }
4830 }
4831 if ((oldmodep->c_lflag ^ tp->t_modes.c_lflag) & TOSTOP) {
4832 /*
4833 * The "stop on background write" bit is changing.
4834 */
4835 if (tp->t_modes.c_lflag & TOSTOP)
4836 optbuf.so_flags |= SO_TOSTOP;
4837 else
4838 optbuf.so_flags |= SO_TONSTOP;
4839 }
4840 if (optbuf.so_flags != 0) {
4841 if ((bp = allocb(sizeof (struct stroptions), BPRI_HI)) ==
4842 NULL) {
4843 return (-1);
4844 }
4845 *(struct stroptions *)bp->b_wptr = optbuf;
4846 bp->b_wptr += sizeof (struct stroptions);
4847 bp->b_datap->db_type = M_SETOPTS;
4848 DEBUG4(("M_SETOPTS to stream head\n"));
4849 putnext(q, bp);
4850 }
4851 return (0);
4852 }
4853
4854
4855 /*
4856 * Called when an M_IOCACK message is seen on the read queue;
4857 * modifies the data being returned, if necessary, and passes the
4858 * reply up.
4859 */
4860 static void
4861 ldterm_ioctl_reply(queue_t *q, mblk_t *mp)
4862 {
4863 ldtermstd_state_t *tp;
4864 struct iocblk *iocp;
4865
4866 iocp = (struct iocblk *)mp->b_rptr;
4867 tp = (ldtermstd_state_t *)q->q_ptr;
4868
4869 switch (iocp->ioc_cmd) {
4870
4871 case TCGETS:
4872 {
4873 /*
4874 * Get current parameters and return them to
4875 * stream head eventually.
4876 */
4877 struct termios *cb =
4878 (struct termios *)mp->b_cont->b_rptr;
4879
4880 /*
4881 * cflag has cflags sent upstream by the
4882 * driver
4883 */
4884 tcflag_t cflag = cb->c_cflag;
4885
4886 *cb = tp->t_amodes;
4887 if (cflag != 0)
4888 cb->c_cflag = cflag; /* set by driver */
4889 break;
4890 }
4891
4892 case TCGETA:
4893 {
4894 /*
4895 * Old-style "ioctl" to get current
4896 * parameters and return them to stream head
4897 * eventually.
4898 */
4899 struct termio *cb =
4900 (struct termio *)mp->b_cont->b_rptr;
4901
4902 cb->c_iflag = tp->t_amodes.c_iflag; /* all except the */
4903 cb->c_oflag = tp->t_amodes.c_oflag; /* cb->c_cflag */
4904 cb->c_lflag = tp->t_amodes.c_lflag;
4905
4906 if (cb->c_cflag == 0) /* not set by driver */
4907 cb->c_cflag = tp->t_amodes.c_cflag;
4908
4909 cb->c_line = 0;
4910 bcopy(tp->t_amodes.c_cc, cb->c_cc, NCC);
4911 break;
4912 }
4913 }
4914 putnext(q, mp);
4915 }
4916
4917
4918 /*
4919 * A VMIN/VTIME request has been satisfied. Cancel outstanding timers
4920 * if they exist, clear TS_MREAD state, and send upstream. If a NULL
4921 * queue ptr is passed, just reset VMIN/VTIME state.
4922 */
4923 static void
4924 vmin_satisfied(queue_t *q, ldtermstd_state_t *tp, int sendup)
4925 {
4926 ASSERT(q);
4927 if (tp->t_vtid != 0) {
4928 DEBUG4(("vmin_satisfied: cancelled timer id %d\n", tp->t_vtid));
4929 (void) quntimeout(q, tp->t_vtid);
4930 tp->t_vtid = 0;
4931 }
4932 if (sendup) {
4933 if (tp->t_msglen == 0 && V_MIN) {
4934 /* EMPTY */
4935 DEBUG4(("vmin_satisfied: data swiped, msglen = 0\n"));
4936 } else {
4937 if ((!q->q_first) ||
4938 (q->q_first->b_datap->db_type != M_DATA) ||
4939 (tp->t_msglen >= LDCHUNK)) {
4940 ldterm_msg_upstream(q, tp);
4941 DEBUG4(("vmin_satisfied: delivering data\n"));
4942 }
4943 }
4944 } else {
4945 /* EMPTY */
4946 DEBUG4(("vmin_satisfied: VMIN/TIME state reset\n"));
4947 }
4948 tp->t_state &= ~TS_MREAD;
4949 }
4950
4951 static void
4952 vmin_settimer(queue_t *q)
4953 {
4954 ldtermstd_state_t *tp;
4955
4956 tp = (ldtermstd_state_t *)q->q_ptr;
4957
4958 /*
4959 * Don't start any time bombs.
4960 */
4961 if (tp->t_state & TS_CLOSE)
4962 return;
4963
4964 /*
4965 * tp->t_vtid should NOT be set here unless VMIN > 0 and
4966 * VTIME > 0.
4967 */
4968 if (tp->t_vtid) {
4969 if (V_MIN && V_TIME) {
4970 /* EMPTY */
4971 DEBUG4(("vmin_settimer: timer restarted, old tid=%d\n",
4972 tp->t_vtid));
4973 } else {
4974 /* EMPTY */
4975 DEBUG4(("vmin_settimer: tid = %d was still active!\n",
4976 tp->t_vtid));
4977 }
4978 (void) quntimeout(q, tp->t_vtid);
4979 tp->t_vtid = 0;
4980 }
4981 tp->t_vtid = qtimeout(q, vmin_timed_out, q,
4982 (clock_t)(V_TIME * (hz / 10)));
4983 DEBUG4(("vmin_settimer: timer started, tid = %d\n", tp->t_vtid));
4984 }
4985
4986
4987 /*
4988 * BRRrrringgg!! VTIME was satisfied instead of VMIN
4989 */
4990 static void
4991 vmin_timed_out(void *arg)
4992 {
4993 queue_t *q = arg;
4994 ldtermstd_state_t *tp;
4995
4996 tp = (ldtermstd_state_t *)q->q_ptr;
4997
4998 DEBUG4(("vmin_timed_out: tid = %d\n", tp->t_vtid));
4999 /* don't call untimeout now that we are in the timeout */
5000 tp->t_vtid = 0;
5001 vmin_satisfied(q, tp, 1);
5002 }
5003
5004
5005 /*
5006 * Routine to adjust termios flags to be processed by the line
5007 * discipline. Driver below sends a termios structure, with the flags
5008 * the driver intends to process. XOR'ing the driver sent termios
5009 * structure with current termios structure with the default values
5010 * (or set by ioctls from userland), we come up with a new termios
5011 * structrue, the flags of which will be used by the line discipline
5012 * in processing input and output. On return from this routine, we
5013 * will have the following fields set in tp structure -->
5014 * tp->t_modes: modes the line discipline will process tp->t_amodes:
5015 * modes the user process thinks the line discipline is processing
5016 */
5017
5018 static void
5019 ldterm_adjust_modes(ldtermstd_state_t *tp)
5020 {
5021
5022 DEBUG6(("original iflag = %o\n", tp->t_modes.c_iflag));
5023 tp->t_modes.c_iflag = tp->t_amodes.c_iflag & ~(tp->t_dmodes.c_iflag);
5024 tp->t_modes.c_oflag = tp->t_amodes.c_oflag & ~(tp->t_dmodes.c_oflag);
5025 tp->t_modes.c_lflag = tp->t_amodes.c_lflag & ~(tp->t_dmodes.c_lflag);
5026 DEBUG6(("driver iflag = %o\n", tp->t_dmodes.c_iflag));
5027 DEBUG6(("apparent iflag = %o\n", tp->t_amodes.c_iflag));
5028 DEBUG6(("effective iflag = %o\n", tp->t_modes.c_iflag));
5029
5030 /* No negotiation of clfags c_cc array special characters */
5031 /*
5032 * Copy from amodes to modes already done by TCSETA/TCSETS
5033 * code
5034 */
5035 }
5036
5037
5038 /*
5039 * Erase one multi-byte character. If TS_MEUC is set AND this
5040 * is a multi-byte character, then this should be called instead of
5041 * ldterm_erase. "ldterm_erase" will handle ASCII nicely, thank you.
5042 *
5043 * We'd better be pointing to the last byte. If we aren't, it will get
5044 * screwed up.
5045 */
5046 static void
5047 ldterm_csi_erase(queue_t *q, size_t ebsize, ldtermstd_state_t *tp)
5048 {
5049 int i, ung;
5050 uchar_t *p, *bottom;
5051 uchar_t u8[LDTERM_CS_MAX_BYTE_LENGTH];
5052 int c;
5053 int j;
5054 int len;
5055
5056 if (tp->t_eucleft) {
5057 /* XXX Ick. We're in the middle of an EUC! */
5058 /* What to do now? */
5059 ldterm_eucwarn(tp);
5060 return; /* ignore it??? */
5061 }
5062 bottom = tp->t_eucp_mp->b_rptr;
5063 p = tp->t_eucp - 1; /* previous byte */
5064 if (p < bottom)
5065 return;
5066 ung = 1; /* number of bytes to un-get from buffer */
5067 /*
5068 * go through the buffer until we find the beginning of the
5069 * multi-byte char.
5070 */
5071 while ((*p == 0) && (p > bottom)) {
5072 p--;
5073 ++ung;
5074 }
5075
5076 /*
5077 * Now, "ung" is the number of bytes to unget from the buffer
5078 * and "*p" is the disp width of it. Fool "ldterm_rubout"
5079 * into thinking we're rubbing out ASCII characters. Do that
5080 * for the display width of the character.
5081 *
5082 * Also we accumulate bytes of the character so that if the character
5083 * is a UTF-8 character, we will get the display width of the UTF-8
5084 * character.
5085 */
5086 if (ung >= LDTERM_CS_MAX_BYTE_LENGTH) {
5087 j = len = LDTERM_CS_MAX_BYTE_LENGTH;
5088 } else {
5089 j = len = ung;
5090 }
5091 for (i = 0; i < ung; i++) { /* remove from buf */
5092 if ((c = ldterm_unget(tp)) != (-1)) {
5093 ldterm_trim(tp);
5094 if (j > 0)
5095 u8[--j] = (uchar_t)c;
5096 }
5097 }
5098 if (*p == UNKNOWN_WIDTH) {
5099 if (tp->t_csdata.codeset_type == LDTERM_CS_TYPE_UTF8) {
5100 *p = ldterm_utf8_width(u8, len);
5101 } else {
5102 *p = 1;
5103 }
5104 }
5105 for (i = 0; i < (int)*p; i++) /* remove from screen */
5106 ldterm_rubout(' ', q, ebsize, tp);
5107 /*
5108 * Adjust the parallel array pointer. Zero out the contents
5109 * of parallel array for this position, just to make sure...
5110 */
5111 tp->t_eucp = p;
5112 *p = 0;
5113 }
5114
5115
5116 /*
5117 * This is kind of a safety valve. Whenever we see a bad sequence
5118 * come up, we call eucwarn. It just tallies the junk until a
5119 * threshold is reached. Then it prints ONE message on the console
5120 * and not any more. Hopefully, we can catch garbage; maybe it will
5121 * be useful to somebody.
5122 */
5123 static void
5124 ldterm_eucwarn(ldtermstd_state_t *tp)
5125 {
5126 ++tp->t_eucwarn;
5127 #ifdef DEBUG
5128 if ((tp->t_eucwarn > EUC_WARNCNT) && !(tp->t_state & TS_WARNED)) {
5129 cmn_err(CE_WARN,
5130 "ldterm: tty at addr %p in multi-byte mode --",
5131 (void *)tp);
5132 cmn_err(CE_WARN,
5133 "Over %d bad EUC characters this session", EUC_WARNCNT);
5134 tp->t_state |= TS_WARNED;
5135 }
5136 #endif
5137 }
5138
5139
5140 /*
5141 * Copy an "eucioc_t" structure. We use the structure with
5142 * incremented values for Codesets 2 & 3. The specification in
5143 * eucioctl is that the sames values as the CSWIDTH definition at
5144 * user level are passed to us. When we copy it "in" to ourselves, we
5145 * do the increment. That allows us to avoid treating each character
5146 * set separately for "t_eucleft" purposes. When we copy it "out" to
5147 * return it to the user, we decrement the values so the user gets
5148 * what it expects, and it matches CSWIDTH in the environment (if
5149 * things are consistent!).
5150 */
5151 static void
5152 cp_eucwioc(eucioc_t *from, eucioc_t *to, int dir)
5153 {
5154 bcopy(from, to, EUCSIZE);
5155 if (dir == EUCOUT) { /* copying out to user */
5156 if (to->eucw[2])
5157 --to->eucw[2];
5158 if (to->eucw[3])
5159 --to->eucw[3];
5160 } else { /* copying in */
5161 if (to->eucw[2])
5162 ++to->eucw[2];
5163 if (to->eucw[3])
5164 ++to->eucw[3];
5165 }
5166 }
5167
5168
5169 /*
5170 * Take the first byte of a multi-byte, or an ASCII char. Return its
5171 * codeset. If it's NOT the first byte of an EUC, then the return
5172 * value may be garbage, as it's probably not SS2 or SS3, and
5173 * therefore must be in codeset 1. Another bizarre catch here is the
5174 * fact that we don't do anything about the "C1" control codes. In
5175 * real life, we should; but nobody's come up with a good way of
5176 * treating them.
5177 */
5178
5179 static int
5180 ldterm_codeset(uchar_t codeset_type, uchar_t c)
5181 {
5182
5183 if (ISASCII(c))
5184 return (0);
5185
5186 if (codeset_type != LDTERM_CS_TYPE_EUC)
5187 return (1);
5188
5189 switch (c) {
5190 case SS2:
5191 return (2);
5192 case SS3:
5193 return (3);
5194 default:
5195 return (1);
5196 }
5197 }
5198
5199 /* The following two functions are additional EUC codeset specific methods. */
5200 /*
5201 * ldterm_dispwidth - Take the first byte of an EUC (or ASCII) and
5202 * return the display width. Since this is intended mostly for
5203 * multi-byte handling, it returns EUC_TWIDTH for tabs so they can be
5204 * differentiated from EUC characters (assumption: EUC require fewer
5205 * than 255 columns). Also, if it's a backspace and !flag, it
5206 * returns EUC_BSWIDTH. Newline & CR also depend on flag. This
5207 * routine SHOULD be cleaner than this, but we have the situation
5208 * where we may or may not be counting control characters as having a
5209 * column width. Therefore, the computation of ASCII is pretty messy.
5210 * The caller will be storing the value, and then switching on it
5211 * when it's used. We really should define the EUC_TWIDTH and other
5212 * constants in a header so that the routine could be used in other
5213 * modules in the kernel.
5214 */
5215 static int
5216 __ldterm_dispwidth_euc(uchar_t c, void *p, int mode)
5217 {
5218 ldtermstd_state_t *tp = (ldtermstd_state_t *)p;
5219
5220 if (ISASCII(c)) {
5221 if (c <= '\037') {
5222 switch (c) {
5223 case '\t':
5224 return (EUC_TWIDTH);
5225 case '\b':
5226 return (mode ? 2 : EUC_BSWIDTH);
5227 case '\n':
5228 return (EUC_NLWIDTH);
5229 case '\r':
5230 return (mode ? 2 : EUC_CRWIDTH);
5231 default:
5232 return (mode ? 2 : 0);
5233 }
5234 }
5235 return (1);
5236 }
5237 switch (c) {
5238 case SS2:
5239 return (tp->eucwioc.scrw[2]);
5240 case SS3:
5241 return (tp->eucwioc.scrw[3]);
5242 default:
5243 return (tp->eucwioc.scrw[1]);
5244 }
5245 }
5246
5247 /*
5248 * ldterm_memwidth_euc - Take the first byte of an EUC (or an ASCII char)
5249 * and return its memory width. The routine could have been
5250 * implemented to use only the codeset number, but that would require
5251 * the caller to have that value available. Perhaps the user doesn't
5252 * want to make the extra call or keep the value of codeset around.
5253 * Therefore, we use the actual character with which they're
5254 * concerned. This should never be called with anything but the
5255 * first byte of an EUC, otherwise it will return a garbage value.
5256 */
5257 static int
5258 __ldterm_memwidth_euc(uchar_t c, void *p)
5259 {
5260 ldtermstd_state_t *tp = (ldtermstd_state_t *)p;
5261
5262 if (ISASCII(c))
5263 return (1);
5264 switch (c) {
5265 case SS2:
5266 return (tp->eucwioc.eucw[2]);
5267 case SS3:
5268 return (tp->eucwioc.eucw[3]);
5269 default:
5270 return (tp->eucwioc.eucw[1]);
5271 }
5272 }
5273
5274
5275 /* The following two functions are PCCS codeset specific methods. */
5276 static int
5277 __ldterm_dispwidth_pccs(uchar_t c, void *p, int mode)
5278 {
5279 ldtermstd_state_t *tp = (ldtermstd_state_t *)p;
5280 int i;
5281
5282 if (ISASCII(c)) {
5283 if (c <= '\037') {
5284 switch (c) {
5285 case '\t':
5286 return (EUC_TWIDTH);
5287 case '\b':
5288 return (mode ? 2 : EUC_BSWIDTH);
5289 case '\n':
5290 return (EUC_NLWIDTH);
5291 case '\r':
5292 return (mode ? 2 : EUC_CRWIDTH);
5293 default:
5294 return (mode ? 2 : 0);
5295 }
5296 }
5297 return (1);
5298 }
5299
5300 for (i = 0; i < tp->t_csdata.csinfo_num; i++) {
5301 if (c >= tp->t_csdata.eucpc_data[i].msb_start &&
5302 c <= tp->t_csdata.eucpc_data[i].msb_end)
5303 return (tp->t_csdata.eucpc_data[i].screen_width);
5304 }
5305
5306 /*
5307 * If this leading byte is not in the range list, either provided
5308 * locale data is not sufficient or we encountered an invalid
5309 * character. We return 1 in this case as a fallback value.
5310 */
5311 return (1);
5312 }
5313
5314 static int
5315 __ldterm_memwidth_pccs(uchar_t c, void *p)
5316 {
5317 ldtermstd_state_t *tp = (ldtermstd_state_t *)p;
5318 int i;
5319
5320 for (i = 0; i < tp->t_csdata.csinfo_num; i++) {
5321 if (c >= tp->t_csdata.eucpc_data[i].msb_start &&
5322 c <= tp->t_csdata.eucpc_data[i].msb_end)
5323 return (tp->t_csdata.eucpc_data[i].byte_length);
5324 }
5325
5326 /*
5327 * If this leading byte is not in the range list, either provided
5328 * locale data is not sufficient or we encountered an invalid
5329 * character. We return 1 in this case as a fallback value.
5330 */
5331 return (1);
5332 }
5333
5334
5335 /* The following two functions are UTF-8 codeset specific methods. */
5336 static int
5337 __ldterm_dispwidth_utf8(uchar_t c, void *p, int mode)
5338 {
5339 ldtermstd_state_t *tp = (ldtermstd_state_t *)p;
5340
5341 if (ISASCII(c)) {
5342 if (c <= '\037') {
5343 switch (c) {
5344 case '\t':
5345 return (EUC_TWIDTH);
5346 case '\b':
5347 return (mode ? 2 : EUC_BSWIDTH);
5348 case '\n':
5349 return (EUC_NLWIDTH);
5350 case '\r':
5351 return (mode ? 2 : EUC_CRWIDTH);
5352 default:
5353 return (mode ? 2 : 0);
5354 }
5355 }
5356 return (1);
5357 }
5358
5359 /* This is to silence the lint. */
5360 if (tp->t_csdata.codeset_type != LDTERM_CS_TYPE_UTF8)
5361 return (1);
5362
5363 /*
5364 * If it is a valid leading byte of a UTF-8 character, we set
5365 * the width as 'UNKNOWN_WIDTH' for now. We need to have all
5366 * the bytes to figure out the display width.
5367 */
5368 if (c >= (uchar_t)0xc0 && c <= (uchar_t)0xfd)
5369 return (UNKNOWN_WIDTH);
5370
5371 /*
5372 * If it is an invalid leading byte, we just do our best by
5373 * giving the display width of 1.
5374 */
5375 return (1);
5376 }
5377
5378
5379 static int
5380 __ldterm_memwidth_utf8(uchar_t c, void *p)
5381 {
5382 ldtermstd_state_t *tp = (ldtermstd_state_t *)p;
5383 int len;
5384
5385 /*
5386 * If the codeset type doesn't match, we treat them as
5387 * an illegal character and return 1.
5388 */
5389 if (tp->t_csdata.codeset_type != LDTERM_CS_TYPE_UTF8)
5390 return (1);
5391
5392 len = u8_number_of_bytes[c];
5393
5394 /*
5395 * If this is a start of an illegal character, we treat
5396 * such as an 1 byte character and screen out.
5397 */
5398 return ((len <= 0) ? 1 : len);
5399 }
5400
5401 static uchar_t
5402 ldterm_utf8_width(uchar_t *u8, int length)
5403 {
5404 int i;
5405 int j;
5406 uint_t intcode = 0;
5407
5408 if (length == 0)
5409 return ('\0');
5410
5411 j = u8_number_of_bytes[u8[0]] - 1;
5412
5413 /*
5414 * If the UTF-8 character is out of UTF-16 code range, or,
5415 * if it is either an ASCII character or an invalid leading byte for
5416 * a UTF-8 character, return 1.
5417 */
5418 if (length > 4 || j <= 0)
5419 return ('\1');
5420
5421 intcode = u8[0] & u8_masks_tbl[j];
5422 for (i = 1; j > 0; j--, i++) {
5423 /*
5424 * The following additional checking is needed to conform to
5425 * the "UTF-8 Corrigendum" introduced at the Unicode 3.1 and
5426 * then updated one more time at the Unicode 3.2.
5427 */
5428 if (i == 1) {
5429 if (u8[i] < u8_valid_min_2nd_byte[u8[0]] ||
5430 u8[i] > u8_valid_max_2nd_byte[u8[0]])
5431 return ('\1');
5432 } else if (u8[i] < (uchar_t)LDTERM_CS_TYPE_UTF8_MIN_BYTE ||
5433 u8[i] > (uchar_t)LDTERM_CS_TYPE_UTF8_MAX_BYTE)
5434 return ('\1');
5435
5436 /*
5437 * All subsequent bytes of UTF-8 character has the following
5438 * binary encoding:
5439 *
5440 * 10xx xxxx
5441 *
5442 * hence left shift six bits to make space and then get
5443 * six bits from the new byte.
5444 */
5445 intcode = (intcode << LDTERM_CS_TYPE_UTF8_SHIFT_BITS) |
5446 (u8[i] & LDTERM_CS_TYPE_UTF8_BIT_MASK);
5447 }
5448
5449 i = 0;
5450 if (intcode <= LDTERM_CS_TYPE_UTF8_MAX_P00) {
5451 /* Basic Multilingual Plane. */
5452 i = intcode / 4;
5453 j = intcode % 4;
5454 switch (j) {
5455 case 0:
5456 i = ldterm_ucode[0][i].u0;
5457 break;
5458 case 1:
5459 i = ldterm_ucode[0][i].u1;
5460 break;
5461 case 2:
5462 i = ldterm_ucode[0][i].u2;
5463 break;
5464 case 3:
5465 i = ldterm_ucode[0][i].u3;
5466 break;
5467 }
5468 } else if (intcode <= LDTERM_CS_TYPE_UTF8_MAX_P01) {
5469 /* Secondary Multilingual Plane. */
5470 intcode = intcode & (uint_t)0xffff;
5471 i = intcode / 4;
5472 j = intcode % 4;
5473 switch (j) {
5474 case 0:
5475 i = ldterm_ucode[1][i].u0;
5476 break;
5477 case 1:
5478 i = ldterm_ucode[1][i].u1;
5479 break;
5480 case 2:
5481 i = ldterm_ucode[1][i].u2;
5482 break;
5483 case 3:
5484 i = ldterm_ucode[1][i].u3;
5485 break;
5486 }
5487 } else if ((intcode >= LDTERM_CS_TYPE_UTF8_MIN_CJKEXTB &&
5488 intcode <= LDTERM_CS_TYPE_UTF8_MAX_CJKEXTB) ||
5489 (intcode >= LDTERM_CS_TYPE_UTF8_MIN_CJKCOMP &&
5490 intcode <= LDTERM_CS_TYPE_UTF8_MAX_CJKCOMP) ||
5491 (intcode >= LDTERM_CS_TYPE_UTF8_MIN_P15 &&
5492 intcode <= LDTERM_CS_TYPE_UTF8_MAX_P15) ||
5493 (intcode >= LDTERM_CS_TYPE_UTF8_MIN_P16 &&
5494 intcode <= LDTERM_CS_TYPE_UTF8_MAX_P16)) {
5495 /*
5496 * Supplementary Plane for CJK Ideographs and
5497 * Private Use Planes.
5498 */
5499 return ('\2');
5500 } else if ((intcode >= LDTERM_CS_TYPE_UTF8_MIN_P14 &&
5501 intcode <= LDTERM_CS_TYPE_UTF8_MAX_P14) ||
5502 (intcode >= LDTERM_CS_TYPE_UTF8_MIN_VARSEL &&
5503 intcode <= LDTERM_CS_TYPE_UTF8_MAX_VARSEL)) {
5504 /*
5505 * Some Special Purpose Plane characters:
5506 * These are like control characters and not printable.
5507 */
5508 return ('\0');
5509 }
5510
5511 /*
5512 * We return the display width of 1 for all character code points
5513 * that we didn't catch from the above logic and also for combining
5514 * and conjoining characters with width value of zero.
5515 *
5516 * In particular, the reason why we are returning 1 for combining
5517 * and conjoining characters is because the GUI-based terminal
5518 * emulators are not yet capable of properly handling such characters
5519 * and in most of the cases, they just treat such characters as if
5520 * they occupy a display cell. If the terminal emulators are capable of
5521 * handling the characters correctly, then, this logic of returning
5522 * 1 should be revisited and changed. See CR 6660526 for more
5523 * details on this.
5524 */
5525 return ((i == 0) ? '\1' : (uchar_t)i);
5526 }