Commit | Line | Data |
---|---|---|
da7c5cc6 KM |
1 | /* |
2 | * Copyright (c) 1982 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | * | |
2eaeef4d | 6 | * @(#)tty.c 6.25 (Berkeley) %G% |
da7c5cc6 | 7 | */ |
961945a8 SL |
8 | |
9 | #include "../machine/reg.h" | |
89dc6dfb | 10 | |
94368568 JB |
11 | #include "param.h" |
12 | #include "systm.h" | |
13 | #include "dir.h" | |
14 | #include "user.h" | |
15 | #include "ioctl.h" | |
16 | #include "tty.h" | |
17 | #include "proc.h" | |
18 | #include "inode.h" | |
19 | #include "file.h" | |
20 | #include "conf.h" | |
21 | #include "buf.h" | |
22 | #include "dk.h" | |
23 | #include "uio.h" | |
24 | #include "kernel.h" | |
89dc6dfb | 25 | |
8bba2b8f RE |
26 | /* |
27 | * Table giving parity for characters and indicating | |
28 | * character classes to tty driver. In particular, | |
29 | * if the low 6 bits are 0, then the character needs | |
30 | * no special processing on output. | |
31 | */ | |
32 | ||
33 | char partab[] = { | |
34 | 0001,0201,0201,0001,0201,0001,0001,0201, | |
35 | 0202,0004,0003,0201,0005,0206,0201,0001, | |
36 | 0201,0001,0001,0201,0001,0201,0201,0001, | |
37 | 0001,0201,0201,0001,0201,0001,0001,0201, | |
38 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
39 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
40 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
41 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
42 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
43 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
44 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
45 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
46 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
47 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
48 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
49 | 0000,0200,0200,0000,0200,0000,0000,0201, | |
50 | ||
51 | /* | |
52 | * 7 bit ascii ends with the last character above, | |
53 | * but we contine through all 256 codes for the sake | |
54 | * of the tty output routines which use special vax | |
55 | * instructions which need a 256 character trt table. | |
56 | */ | |
57 | ||
58 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
59 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
60 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
61 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
62 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
63 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
64 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
65 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
66 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
67 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
68 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
69 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
70 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
71 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
72 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
73 | 0007,0007,0007,0007,0007,0007,0007,0007 | |
74 | }; | |
89dc6dfb | 75 | |
89dc6dfb BJ |
76 | /* |
77 | * Input mapping table-- if an entry is non-zero, when the | |
78 | * corresponding character is typed preceded by "\" the escape | |
79 | * sequence is replaced by the table value. Mostly used for | |
80 | * upper-case only terminals. | |
81 | */ | |
89dc6dfb BJ |
82 | char maptab[] ={ |
83 | 000,000,000,000,000,000,000,000, | |
84 | 000,000,000,000,000,000,000,000, | |
85 | 000,000,000,000,000,000,000,000, | |
86 | 000,000,000,000,000,000,000,000, | |
87 | 000,'|',000,000,000,000,000,'`', | |
88 | '{','}',000,000,000,000,000,000, | |
89 | 000,000,000,000,000,000,000,000, | |
90 | 000,000,000,000,000,000,000,000, | |
91 | 000,000,000,000,000,000,000,000, | |
92 | 000,000,000,000,000,000,000,000, | |
93 | 000,000,000,000,000,000,000,000, | |
94 | 000,000,000,000,000,000,'~',000, | |
95 | 000,'A','B','C','D','E','F','G', | |
96 | 'H','I','J','K','L','M','N','O', | |
97 | 'P','Q','R','S','T','U','V','W', | |
98 | 'X','Y','Z',000,000,000,000,000, | |
99 | }; | |
100 | ||
0d65848d | 101 | short tthiwat[16] = |
6f21eede | 102 | { 100,100,100,100,100,100,100,200,200,400,400,400,650,650,1300,2000 }; |
0d65848d BJ |
103 | short ttlowat[16] = |
104 | { 30, 30, 30, 30, 30, 30, 30, 50, 50,120,120,120,125,125,125,125 }; | |
105 | ||
becb115c SL |
106 | struct ttychars ttydefaults = { |
107 | CERASE, CKILL, CINTR, CQUIT, CSTART, CSTOP, CEOF, | |
108 | CBRK, CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE,CLNEXT | |
109 | }; | |
89dc6dfb | 110 | |
89dc6dfb | 111 | ttychars(tp) |
becb115c | 112 | struct tty *tp; |
89dc6dfb | 113 | { |
8062c8a7 | 114 | |
becb115c | 115 | tp->t_chars = ttydefaults; |
89dc6dfb BJ |
116 | } |
117 | ||
118 | /* | |
50e2732b | 119 | * Wait for output to drain, then flush input waiting. |
89dc6dfb | 120 | */ |
88a7a62a | 121 | ttywflush(tp) |
941944c9 | 122 | register struct tty *tp; |
89dc6dfb BJ |
123 | { |
124 | ||
88a7a62a SL |
125 | ttywait(tp); |
126 | ttyflush(tp, FREAD); | |
127 | } | |
128 | ||
129 | ttywait(tp) | |
130 | register struct tty *tp; | |
131 | { | |
4f3a716e | 132 | register int s = spltty(); |
88a7a62a | 133 | |
5de287d9 | 134 | while ((tp->t_outq.c_cc || tp->t_state&TS_BUSY) && |
605d7712 | 135 | tp->t_state&TS_CARR_ON) { |
50e2732b | 136 | (*tp->t_oproc)(tp); |
941944c9 | 137 | tp->t_state |= TS_ASLEEP; |
50e2732b BJ |
138 | sleep((caddr_t)&tp->t_outq, TTOPRI); |
139 | } | |
875a1e2c | 140 | splx(s); |
89dc6dfb BJ |
141 | } |
142 | ||
143 | /* | |
becb115c | 144 | * Flush all TTY queues |
89dc6dfb | 145 | */ |
88a7a62a | 146 | ttyflush(tp, rw) |
4b72e2f9 | 147 | register struct tty *tp; |
89dc6dfb | 148 | { |
50e2732b BJ |
149 | register s; |
150 | ||
4f3a716e | 151 | s = spltty(); |
50e2732b BJ |
152 | if (rw & FREAD) { |
153 | while (getc(&tp->t_canq) >= 0) | |
154 | ; | |
155 | wakeup((caddr_t)&tp->t_rawq); | |
156 | } | |
157 | if (rw & FWRITE) { | |
158 | wakeup((caddr_t)&tp->t_outq); | |
941944c9 | 159 | tp->t_state &= ~TS_TTSTOP; |
39697bd8 | 160 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, rw); |
50e2732b BJ |
161 | while (getc(&tp->t_outq) >= 0) |
162 | ; | |
163 | } | |
164 | if (rw & FREAD) { | |
165 | while (getc(&tp->t_rawq) >= 0) | |
166 | ; | |
becb115c | 167 | tp->t_rocount = 0; |
50e2732b | 168 | tp->t_rocol = 0; |
becb115c | 169 | tp->t_state &= ~TS_LOCAL; |
50e2732b BJ |
170 | } |
171 | splx(s); | |
89dc6dfb BJ |
172 | } |
173 | ||
50e2732b BJ |
174 | /* |
175 | * Send stop character on input overflow. | |
176 | */ | |
177 | ttyblock(tp) | |
4b72e2f9 | 178 | register struct tty *tp; |
89dc6dfb | 179 | { |
50e2732b | 180 | register x; |
becb115c | 181 | |
50e2732b BJ |
182 | x = tp->t_rawq.c_cc + tp->t_canq.c_cc; |
183 | if (tp->t_rawq.c_cc > TTYHOG) { | |
88a7a62a | 184 | ttyflush(tp, FREAD|FWRITE); |
941944c9 | 185 | tp->t_state &= ~TS_TBLOCK; |
50e2732b | 186 | } |
600d5712 MK |
187 | /* |
188 | * Block further input iff: | |
189 | * Current input > threshold AND input is available to user program | |
190 | */ | |
28b2d854 MK |
191 | if (x >= TTYHOG/2 && |
192 | ((tp->t_flags & (RAW|CBREAK)) || (tp->t_canq.c_cc > 0))) { | |
600d5712 MK |
193 | if (putc(tp->t_stopc, &tp->t_outq)==0) { |
194 | tp->t_state |= TS_TBLOCK; | |
195 | ttstart(tp); | |
196 | } | |
50e2732b | 197 | } |
89dc6dfb BJ |
198 | } |
199 | ||
101ba270 | 200 | /* |
50e2732b BJ |
201 | * Restart typewriter output following a delay |
202 | * timeout. | |
203 | * The name of the routine is passed to the timeout | |
204 | * subroutine and it is called during a clock interrupt. | |
101ba270 | 205 | */ |
50e2732b | 206 | ttrstrt(tp) |
4b72e2f9 | 207 | register struct tty *tp; |
101ba270 BJ |
208 | { |
209 | ||
becb115c SL |
210 | if (tp == 0) |
211 | panic("ttrstrt"); | |
941944c9 | 212 | tp->t_state &= ~TS_TIMEOUT; |
50e2732b | 213 | ttstart(tp); |
101ba270 BJ |
214 | } |
215 | ||
89dc6dfb | 216 | /* |
50e2732b BJ |
217 | * Start output on the typewriter. It is used from the top half |
218 | * after some characters have been put on the output queue, | |
219 | * from the interrupt routine to transmit the next | |
220 | * character, and after a timeout has finished. | |
89dc6dfb | 221 | */ |
50e2732b | 222 | ttstart(tp) |
4b72e2f9 | 223 | register struct tty *tp; |
89dc6dfb | 224 | { |
50e2732b | 225 | register s; |
8062c8a7 | 226 | |
4f3a716e | 227 | s = spltty(); |
becb115c | 228 | if ((tp->t_state & (TS_TIMEOUT|TS_TTSTOP|TS_BUSY)) == 0 && |
4c67f645 | 229 | tp->t_oproc) /* kludge for pty */ |
50e2732b BJ |
230 | (*tp->t_oproc)(tp); |
231 | splx(s); | |
89dc6dfb BJ |
232 | } |
233 | ||
234 | /* | |
50e2732b | 235 | * Common code for tty ioctls. |
89dc6dfb | 236 | */ |
49c84d3f | 237 | /*ARGSUSED*/ |
4b72e2f9 SL |
238 | ttioctl(tp, com, data, flag) |
239 | register struct tty *tp; | |
240 | caddr_t data; | |
89dc6dfb | 241 | { |
840510a3 | 242 | int dev = tp->t_dev; |
89dc6dfb | 243 | extern int nldisp; |
fc6972ae | 244 | int s; |
88a7a62a | 245 | register int newflags; |
89dc6dfb | 246 | |
50e2732b BJ |
247 | /* |
248 | * If the ioctl involves modification, | |
4f3a716e | 249 | * hang if in the background. |
50e2732b | 250 | */ |
4b72e2f9 | 251 | switch (com) { |
50e2732b | 252 | |
c6fe3a50 BJ |
253 | case TIOCSETD: |
254 | case TIOCSETP: | |
255 | case TIOCSETN: | |
50e2732b BJ |
256 | case TIOCFLUSH: |
257 | case TIOCSETC: | |
258 | case TIOCSLTC: | |
259 | case TIOCSPGRP: | |
260 | case TIOCLBIS: | |
261 | case TIOCLBIC: | |
262 | case TIOCLSET: | |
8203fe05 | 263 | case TIOCSTI: |
f9eea644 | 264 | case TIOCSWINSZ: |
50e2732b BJ |
265 | while (tp->t_line == NTTYDISC && |
266 | u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && | |
267 | (u.u_procp->p_flag&SVFORK) == 0 && | |
52c041cd MK |
268 | !(u.u_procp->p_sigignore & sigmask(SIGTTOU)) && |
269 | !(u.u_procp->p_sigmask & sigmask(SIGTTOU))) { | |
50e2732b BJ |
270 | gsignal(u.u_procp->p_pgrp, SIGTTOU); |
271 | sleep((caddr_t)&lbolt, TTOPRI); | |
272 | } | |
273 | break; | |
274 | } | |
275 | ||
becb115c SL |
276 | /* |
277 | * Process the ioctl. | |
278 | */ | |
4b72e2f9 | 279 | switch (com) { |
89dc6dfb | 280 | |
fc6972ae | 281 | /* get discipline number */ |
89dc6dfb | 282 | case TIOCGETD: |
4b72e2f9 | 283 | *(int *)data = tp->t_line; |
89dc6dfb BJ |
284 | break; |
285 | ||
fc6972ae | 286 | /* set line discipline */ |
4b72e2f9 SL |
287 | case TIOCSETD: { |
288 | register int t = *(int *)data; | |
becb115c | 289 | int error = 0; |
4b72e2f9 | 290 | |
9b905352 | 291 | if ((unsigned) t >= nldisp) |
4a003df3 | 292 | return (ENXIO); |
2eaeef4d MK |
293 | if (t != tp->t_line) { |
294 | s = spltty(); | |
295 | (*linesw[tp->t_line].l_close)(tp); | |
296 | error = (*linesw[t].l_open)(dev, tp); | |
297 | if (error) { | |
298 | (void) (*linesw[tp->t_line].l_open)(dev, tp); | |
299 | splx(s); | |
300 | return (error); | |
301 | } | |
302 | tp->t_line = t; | |
4a003df3 | 303 | splx(s); |
4a003df3 | 304 | } |
89dc6dfb | 305 | break; |
4b72e2f9 | 306 | } |
89dc6dfb | 307 | |
fc6972ae | 308 | /* prevent more opens on channel */ |
152c2598 BJ |
309 | case TIOCEXCL: |
310 | tp->t_state |= TS_XCLUDE; | |
311 | break; | |
312 | ||
313 | case TIOCNXCL: | |
314 | tp->t_state &= ~TS_XCLUDE; | |
315 | break; | |
316 | ||
fc6972ae | 317 | /* hang up line on last close */ |
89dc6dfb | 318 | case TIOCHPCL: |
941944c9 | 319 | tp->t_state |= TS_HUPCLS; |
89dc6dfb BJ |
320 | break; |
321 | ||
7d973a4d | 322 | case TIOCFLUSH: { |
4b72e2f9 SL |
323 | register int flags = *(int *)data; |
324 | ||
325 | if (flags == 0) | |
7d973a4d | 326 | flags = FREAD|FWRITE; |
4b72e2f9 SL |
327 | else |
328 | flags &= FREAD|FWRITE; | |
88a7a62a | 329 | ttyflush(tp, flags); |
89dc6dfb | 330 | break; |
4568c08e | 331 | } |
89dc6dfb | 332 | |
fc6972ae | 333 | /* return number of characters immediately available */ |
4b72e2f9 SL |
334 | case FIONREAD: |
335 | *(off_t *)data = ttnread(tp); | |
8062c8a7 | 336 | break; |
8062c8a7 | 337 | |
b968e450 SL |
338 | case TIOCOUTQ: |
339 | *(int *)data = tp->t_outq.c_cc; | |
340 | break; | |
341 | ||
a8d3bf7f | 342 | case TIOCSTOP: |
4f3a716e | 343 | s = spltty(); |
becb115c | 344 | if ((tp->t_state&TS_TTSTOP) == 0) { |
bfcf09ee BJ |
345 | tp->t_state |= TS_TTSTOP; |
346 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
347 | } | |
4b72e2f9 | 348 | splx(s); |
bfcf09ee BJ |
349 | break; |
350 | ||
a8d3bf7f | 351 | case TIOCSTART: |
4f3a716e | 352 | s = spltty(); |
becb115c | 353 | if ((tp->t_state&TS_TTSTOP) || (tp->t_flags&FLUSHO)) { |
bfcf09ee | 354 | tp->t_state &= ~TS_TTSTOP; |
becb115c | 355 | tp->t_flags &= ~FLUSHO; |
bfcf09ee BJ |
356 | ttstart(tp); |
357 | } | |
4b72e2f9 | 358 | splx(s); |
bfcf09ee BJ |
359 | break; |
360 | ||
8203fe05 SL |
361 | /* |
362 | * Simulate typing of a character at the terminal. | |
363 | */ | |
364 | case TIOCSTI: | |
477d62ec KM |
365 | if (u.u_uid && (flag & FREAD) == 0) |
366 | return (EPERM); | |
8203fe05 SL |
367 | if (u.u_uid && u.u_ttyp != tp) |
368 | return (EACCES); | |
becb115c | 369 | (*linesw[tp->t_line].l_rint)(*(char *)data, tp); |
8203fe05 SL |
370 | break; |
371 | ||
88a7a62a SL |
372 | case TIOCSETP: |
373 | case TIOCSETN: { | |
374 | register struct sgttyb *sg = (struct sgttyb *)data; | |
375 | ||
376 | tp->t_erase = sg->sg_erase; | |
377 | tp->t_kill = sg->sg_kill; | |
378 | tp->t_ispeed = sg->sg_ispeed; | |
379 | tp->t_ospeed = sg->sg_ospeed; | |
380 | newflags = (tp->t_flags&0xffff0000) | (sg->sg_flags&0xffff); | |
4f3a716e | 381 | s = spltty(); |
88a7a62a SL |
382 | if (tp->t_flags&RAW || newflags&RAW || com == TIOCSETP) { |
383 | ttywait(tp); | |
384 | ttyflush(tp, FREAD); | |
385 | } else if ((tp->t_flags&CBREAK) != (newflags&CBREAK)) { | |
386 | if (newflags&CBREAK) { | |
387 | struct clist tq; | |
388 | ||
389 | catq(&tp->t_rawq, &tp->t_canq); | |
390 | tq = tp->t_rawq; | |
391 | tp->t_rawq = tp->t_canq; | |
392 | tp->t_canq = tq; | |
393 | } else { | |
394 | tp->t_flags |= PENDIN; | |
096b7e95 | 395 | newflags |= PENDIN; |
88a7a62a SL |
396 | ttwakeup(tp); |
397 | } | |
398 | } | |
399 | tp->t_flags = newflags; | |
400 | if (tp->t_flags&RAW) { | |
401 | tp->t_state &= ~TS_TTSTOP; | |
402 | ttstart(tp); | |
403 | } | |
404 | splx(s); | |
405 | break; | |
406 | } | |
407 | ||
408 | /* send current parameters to user */ | |
409 | case TIOCGETP: { | |
410 | register struct sgttyb *sg = (struct sgttyb *)data; | |
411 | ||
412 | sg->sg_ispeed = tp->t_ispeed; | |
413 | sg->sg_ospeed = tp->t_ospeed; | |
414 | sg->sg_erase = tp->t_erase; | |
415 | sg->sg_kill = tp->t_kill; | |
416 | sg->sg_flags = tp->t_flags; | |
417 | break; | |
418 | } | |
419 | ||
420 | case FIONBIO: | |
421 | if (*(int *)data) | |
422 | tp->t_state |= TS_NBIO; | |
423 | else | |
424 | tp->t_state &= ~TS_NBIO; | |
425 | break; | |
426 | ||
427 | case FIOASYNC: | |
428 | if (*(int *)data) | |
429 | tp->t_state |= TS_ASYNC; | |
430 | else | |
431 | tp->t_state &= ~TS_ASYNC; | |
432 | break; | |
433 | ||
b968e450 SL |
434 | case TIOCGETC: |
435 | bcopy((caddr_t)&tp->t_intrc, data, sizeof (struct tchars)); | |
436 | break; | |
437 | ||
438 | case TIOCSETC: | |
439 | bcopy(data, (caddr_t)&tp->t_intrc, sizeof (struct tchars)); | |
440 | break; | |
441 | ||
88a7a62a SL |
442 | /* set/get local special characters */ |
443 | case TIOCSLTC: | |
444 | bcopy(data, (caddr_t)&tp->t_suspc, sizeof (struct ltchars)); | |
445 | break; | |
446 | ||
447 | case TIOCGLTC: | |
448 | bcopy((caddr_t)&tp->t_suspc, data, sizeof (struct ltchars)); | |
449 | break; | |
450 | ||
451 | /* | |
452 | * Modify local mode word. | |
453 | */ | |
454 | case TIOCLBIS: | |
455 | tp->t_flags |= *(int *)data << 16; | |
456 | break; | |
457 | ||
458 | case TIOCLBIC: | |
459 | tp->t_flags &= ~(*(int *)data << 16); | |
460 | break; | |
461 | ||
462 | case TIOCLSET: | |
463 | tp->t_flags &= 0xffff; | |
464 | tp->t_flags |= *(int *)data << 16; | |
465 | break; | |
466 | ||
467 | case TIOCLGET: | |
99a2ea70 | 468 | *(int *)data = ((unsigned) tp->t_flags) >> 16; |
88a7a62a SL |
469 | break; |
470 | ||
4f3a716e | 471 | /* |
cd69487e | 472 | * Allow SPGRP only if tty is open for reading. |
f9eea644 JB |
473 | * Quick check: if we can find a process in the new pgrp, |
474 | * this user must own that process. | |
475 | * SHOULD VERIFY THAT PGRP IS IN USE AND IS THIS USER'S. | |
4f3a716e | 476 | */ |
245aeefa | 477 | case TIOCSPGRP: { |
4f3a716e MK |
478 | struct proc *p; |
479 | int pgrp = *(int *)data; | |
480 | ||
481 | if (u.u_uid && (flag & FREAD) == 0) | |
482 | return (EPERM); | |
f9eea644 JB |
483 | p = pfind(pgrp); |
484 | if (p && p->p_pgrp == pgrp && | |
485 | p->p_uid != u.u_uid && u.u_uid && !inferior(p)) | |
486 | return (EPERM); | |
4f3a716e | 487 | tp->t_pgrp = pgrp; |
88a7a62a | 488 | break; |
245aeefa | 489 | } |
88a7a62a SL |
490 | |
491 | case TIOCGPGRP: | |
492 | *(int *)data = tp->t_pgrp; | |
493 | break; | |
494 | ||
f9eea644 | 495 | case TIOCSWINSZ: |
245aeefa JB |
496 | if (bcmp((caddr_t)&tp->t_winsize, data, |
497 | sizeof (struct winsize))) { | |
f9eea644 JB |
498 | tp->t_winsize = *(struct winsize *)data; |
499 | gsignal(tp->t_pgrp, SIGWINCH); | |
500 | } | |
501 | break; | |
502 | ||
503 | case TIOCGWINSZ: | |
504 | *(struct winsize *)data = tp->t_winsize; | |
505 | break; | |
506 | ||
89dc6dfb | 507 | default: |
fc6972ae | 508 | return (-1); |
89dc6dfb | 509 | } |
fc6972ae | 510 | return (0); |
89dc6dfb | 511 | } |
e1d74936 BJ |
512 | |
513 | ttnread(tp) | |
514 | struct tty *tp; | |
515 | { | |
516 | int nread = 0; | |
517 | ||
becb115c | 518 | if (tp->t_flags & PENDIN) |
e1d74936 BJ |
519 | ttypend(tp); |
520 | nread = tp->t_canq.c_cc; | |
521 | if (tp->t_flags & (RAW|CBREAK)) | |
522 | nread += tp->t_rawq.c_cc; | |
523 | return (nread); | |
524 | } | |
525 | ||
941944c9 | 526 | ttselect(dev, rw) |
e1d74936 | 527 | dev_t dev; |
941944c9 | 528 | int rw; |
e1d74936 BJ |
529 | { |
530 | register struct tty *tp = &cdevsw[major(dev)].d_ttys[minor(dev)]; | |
531 | int nread; | |
4f3a716e | 532 | int s = spltty(); |
e1d74936 | 533 | |
941944c9 | 534 | switch (rw) { |
e1d74936 BJ |
535 | |
536 | case FREAD: | |
537 | nread = ttnread(tp); | |
93d2ecff | 538 | if ((nread > 0) || ((tp->t_state & TS_CARR_ON) == 0)) |
941944c9 | 539 | goto win; |
89b8a44c | 540 | if (tp->t_rsel && tp->t_rsel->p_wchan == (caddr_t)&selwait) |
941944c9 | 541 | tp->t_state |= TS_RCOLL; |
e1d74936 BJ |
542 | else |
543 | tp->t_rsel = u.u_procp; | |
941944c9 | 544 | break; |
e1d74936 | 545 | |
941944c9 BJ |
546 | case FWRITE: |
547 | if (tp->t_outq.c_cc <= TTLOWAT(tp)) | |
548 | goto win; | |
941944c9 BJ |
549 | if (tp->t_wsel && tp->t_wsel->p_wchan == (caddr_t)&selwait) |
550 | tp->t_state |= TS_WCOLL; | |
551 | else | |
552 | tp->t_wsel = u.u_procp; | |
553 | break; | |
e1d74936 | 554 | } |
941944c9 BJ |
555 | splx(s); |
556 | return (0); | |
557 | win: | |
558 | splx(s); | |
559 | return (1); | |
e1d74936 | 560 | } |
8bba2b8f | 561 | |
4147b3f6 | 562 | /* |
605d7712 | 563 | * Initial open of tty, or (re)entry to line discipline. |
becb115c | 564 | * Establish a process group for distribution of |
4147b3f6 | 565 | * quits and interrupts from the tty. |
4147b3f6 BJ |
566 | */ |
567 | ttyopen(dev, tp) | |
4b72e2f9 SL |
568 | dev_t dev; |
569 | register struct tty *tp; | |
4147b3f6 BJ |
570 | { |
571 | register struct proc *pp; | |
572 | ||
573 | pp = u.u_procp; | |
574 | tp->t_dev = dev; | |
4b72e2f9 | 575 | if (pp->p_pgrp == 0) { |
4147b3f6 BJ |
576 | u.u_ttyp = tp; |
577 | u.u_ttyd = dev; | |
578 | if (tp->t_pgrp == 0) | |
579 | tp->t_pgrp = pp->p_pid; | |
580 | pp->p_pgrp = tp->t_pgrp; | |
581 | } | |
582 | tp->t_state &= ~TS_WOPEN; | |
4f3a716e MK |
583 | if ((tp->t_state & TS_ISOPEN) == 0) { |
584 | tp->t_state |= TS_ISOPEN; | |
f9eea644 | 585 | bzero((caddr_t)&tp->t_winsize, sizeof(tp->t_winsize)); |
4f3a716e MK |
586 | if (tp->t_line != NTTYDISC) |
587 | ttywflush(tp); | |
588 | } | |
fc6972ae | 589 | return (0); |
4147b3f6 BJ |
590 | } |
591 | ||
605d7712 MK |
592 | /* |
593 | * "close" a line discipline | |
594 | */ | |
595 | ttylclose(tp) | |
596 | register struct tty *tp; | |
597 | { | |
598 | ||
599 | ttywflush(tp); | |
600 | tp->t_line = 0; | |
601 | } | |
602 | ||
4147b3f6 BJ |
603 | /* |
604 | * clean tp on last close | |
605 | */ | |
606 | ttyclose(tp) | |
4b72e2f9 | 607 | register struct tty *tp; |
4147b3f6 BJ |
608 | { |
609 | ||
605d7712 | 610 | ttyflush(tp, FREAD|FWRITE); |
4147b3f6 | 611 | tp->t_pgrp = 0; |
4147b3f6 BJ |
612 | tp->t_state = 0; |
613 | } | |
614 | ||
605d7712 MK |
615 | /* |
616 | * Handle modem control transition on a tty. | |
617 | * Flag indicates new state of carrier. | |
618 | * Returns 0 if the line should be turned off, otherwise 1. | |
619 | */ | |
620 | ttymodem(tp, flag) | |
621 | register struct tty *tp; | |
622 | { | |
623 | ||
624 | if ((tp->t_state&TS_WOPEN) == 0 && (tp->t_flags & MDMBUF)) { | |
625 | /* | |
626 | * MDMBUF: do flow control according to carrier flag | |
627 | */ | |
628 | if (flag) { | |
629 | tp->t_state &= ~TS_TTSTOP; | |
630 | ttstart(tp); | |
631 | } else if ((tp->t_state&TS_TTSTOP) == 0) { | |
632 | tp->t_state |= TS_TTSTOP; | |
633 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
634 | } | |
635 | } else if (flag == 0) { | |
636 | /* | |
637 | * Lost carrier. | |
638 | */ | |
639 | tp->t_state &= ~TS_CARR_ON; | |
640 | if (tp->t_state & TS_ISOPEN) { | |
641 | if ((tp->t_flags & NOHANG) == 0) { | |
642 | gsignal(tp->t_pgrp, SIGHUP); | |
643 | gsignal(tp->t_pgrp, SIGCONT); | |
644 | ttyflush(tp, FREAD|FWRITE); | |
645 | return (0); | |
646 | } | |
647 | } | |
648 | } else { | |
649 | /* | |
650 | * Carrier now on. | |
651 | */ | |
652 | tp->t_state |= TS_CARR_ON; | |
653 | wakeup((caddr_t)&tp->t_rawq); | |
654 | } | |
655 | return (1); | |
656 | } | |
657 | ||
e3f2038d MK |
658 | /* |
659 | * Default modem control routine (for other line disciplines). | |
660 | * Return argument flag, to turn off device on carrier drop. | |
661 | */ | |
2f54b5e8 MK |
662 | nullmodem(tp, flag) |
663 | register struct tty *tp; | |
e3f2038d MK |
664 | int flag; |
665 | { | |
666 | ||
667 | if (flag) | |
668 | tp->t_state |= TS_CARR_ON; | |
669 | else | |
670 | tp->t_state &= ~TS_CARR_ON; | |
671 | return (flag); | |
672 | } | |
673 | ||
4147b3f6 BJ |
674 | /* |
675 | * reinput pending characters after state switch | |
4f3a716e | 676 | * call at spltty(). |
4147b3f6 BJ |
677 | */ |
678 | ttypend(tp) | |
4b72e2f9 | 679 | register struct tty *tp; |
4147b3f6 BJ |
680 | { |
681 | struct clist tq; | |
682 | register c; | |
683 | ||
becb115c SL |
684 | tp->t_flags &= ~PENDIN; |
685 | tp->t_state |= TS_TYPEN; | |
4147b3f6 BJ |
686 | tq = tp->t_rawq; |
687 | tp->t_rawq.c_cc = 0; | |
688 | tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0; | |
689 | while ((c = getc(&tq)) >= 0) | |
690 | ttyinput(c, tp); | |
becb115c | 691 | tp->t_state &= ~TS_TYPEN; |
4147b3f6 BJ |
692 | } |
693 | ||
694 | /* | |
becb115c SL |
695 | * Place a character on raw TTY input queue, |
696 | * putting in delimiters and waking up top | |
697 | * half as needed. Also echo if required. | |
698 | * The arguments are the character and the | |
699 | * appropriate tty structure. | |
4147b3f6 BJ |
700 | */ |
701 | ttyinput(c, tp) | |
4b72e2f9 SL |
702 | register c; |
703 | register struct tty *tp; | |
4147b3f6 | 704 | { |
becb115c | 705 | register int t_flags = tp->t_flags; |
4147b3f6 BJ |
706 | int i; |
707 | ||
becb115c SL |
708 | /* |
709 | * If input is pending take it first. | |
710 | */ | |
711 | if (t_flags&PENDIN) | |
4147b3f6 BJ |
712 | ttypend(tp); |
713 | tk_nin++; | |
714 | c &= 0377; | |
becb115c SL |
715 | |
716 | /* | |
717 | * In tandem mode, check high water mark. | |
718 | */ | |
4147b3f6 BJ |
719 | if (t_flags&TANDEM) |
720 | ttyblock(tp); | |
becb115c SL |
721 | |
722 | if (t_flags&RAW) { | |
723 | /* | |
724 | * Raw mode, just put character | |
725 | * in input q w/o interpretation. | |
726 | */ | |
727 | if (tp->t_rawq.c_cc > TTYHOG) | |
88a7a62a | 728 | ttyflush(tp, FREAD|FWRITE); |
becb115c SL |
729 | else { |
730 | if (putc(c, &tp->t_rawq) >= 0) | |
731 | ttwakeup(tp); | |
732 | ttyecho(c, tp); | |
4147b3f6 | 733 | } |
becb115c SL |
734 | goto endcase; |
735 | } | |
736 | ||
737 | /* | |
738 | * Ignore any high bit added during | |
739 | * previous ttyinput processing. | |
740 | */ | |
fb01874e | 741 | if ((tp->t_state&TS_TYPEN) == 0 && (t_flags&PASS8) == 0) |
becb115c SL |
742 | c &= 0177; |
743 | /* | |
744 | * Check for literal nexting very first | |
745 | */ | |
746 | if (tp->t_state&TS_LNCH) { | |
747 | c |= 0200; | |
748 | tp->t_state &= ~TS_LNCH; | |
749 | } | |
750 | ||
751 | /* | |
752 | * Scan for special characters. This code | |
753 | * is really just a big case statement with | |
754 | * non-constant cases. The bottom of the | |
755 | * case statement is labeled ``endcase'', so goto | |
756 | * it after a case match, or similar. | |
757 | */ | |
758 | if (tp->t_line == NTTYDISC) { | |
759 | if (c == tp->t_lnextc) { | |
93d2ecff | 760 | if (t_flags&ECHO) |
4147b3f6 | 761 | ttyout("^\b", tp); |
becb115c SL |
762 | tp->t_state |= TS_LNCH; |
763 | goto endcase; | |
764 | } | |
765 | if (c == tp->t_flushc) { | |
93d2ecff | 766 | if (t_flags&FLUSHO) |
becb115c | 767 | tp->t_flags &= ~FLUSHO; |
4147b3f6 | 768 | else { |
88a7a62a | 769 | ttyflush(tp, FWRITE); |
4147b3f6 | 770 | ttyecho(c, tp); |
becb115c | 771 | if (tp->t_rawq.c_cc + tp->t_canq.c_cc) |
4147b3f6 | 772 | ttyretype(tp); |
becb115c | 773 | tp->t_flags |= FLUSHO; |
4147b3f6 | 774 | } |
becb115c SL |
775 | goto startoutput; |
776 | } | |
777 | if (c == tp->t_suspc) { | |
93d2ecff | 778 | if ((t_flags&NOFLSH) == 0) |
88a7a62a | 779 | ttyflush(tp, FREAD); |
4147b3f6 | 780 | ttyecho(c, tp); |
becb115c SL |
781 | gsignal(tp->t_pgrp, SIGTSTP); |
782 | goto endcase; | |
783 | } | |
784 | } | |
785 | ||
786 | /* | |
787 | * Handle start/stop characters. | |
788 | */ | |
789 | if (c == tp->t_stopc) { | |
790 | if ((tp->t_state&TS_TTSTOP) == 0) { | |
791 | tp->t_state |= TS_TTSTOP; | |
792 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
793 | return; | |
794 | } | |
795 | if (c != tp->t_startc) | |
796 | return; | |
797 | goto endcase; | |
798 | } | |
799 | if (c == tp->t_startc) | |
800 | goto restartoutput; | |
801 | ||
802 | /* | |
803 | * Look for interrupt/quit chars. | |
804 | */ | |
805 | if (c == tp->t_intrc || c == tp->t_quitc) { | |
93d2ecff | 806 | if ((t_flags&NOFLSH) == 0) |
88a7a62a | 807 | ttyflush(tp, FREAD|FWRITE); |
becb115c SL |
808 | ttyecho(c, tp); |
809 | gsignal(tp->t_pgrp, c == tp->t_intrc ? SIGINT : SIGQUIT); | |
810 | goto endcase; | |
811 | } | |
812 | ||
58786a81 JB |
813 | if (tp->t_flags & LCASE && c <= 0177) { |
814 | if (tp->t_state&TS_BKSL) { | |
815 | ttyrub(unputc(&tp->t_rawq), tp); | |
816 | if (maptab[c]) | |
817 | c = maptab[c]; | |
818 | c |= 0200; | |
819 | tp->t_state &= ~(TS_BKSL|TS_QUOT); | |
820 | } else if (c >= 'A' && c <= 'Z') | |
821 | c += 'a' - 'A'; | |
822 | else if (c == '\\') | |
823 | tp->t_state |= TS_BKSL; | |
824 | } | |
825 | ||
becb115c SL |
826 | /* |
827 | * Cbreak mode, don't process line editing | |
828 | * characters; check high water mark for wakeup. | |
829 | */ | |
830 | if (t_flags&CBREAK) { | |
831 | if (tp->t_rawq.c_cc > TTYHOG) { | |
4147b3f6 BJ |
832 | if (tp->t_outq.c_cc < TTHIWAT(tp) && |
833 | tp->t_line == NTTYDISC) | |
834 | (void) ttyoutput(CTRL(g), tp); | |
835 | } else if (putc(c, &tp->t_rawq) >= 0) { | |
836 | ttwakeup(tp); | |
837 | ttyecho(c, tp); | |
838 | } | |
becb115c SL |
839 | goto endcase; |
840 | } | |
841 | ||
842 | /* | |
843 | * From here on down cooked mode character | |
844 | * processing takes place. | |
845 | */ | |
846 | if ((tp->t_state&TS_QUOT) && | |
847 | (c == tp->t_erase || c == tp->t_kill)) { | |
848 | ttyrub(unputc(&tp->t_rawq), tp); | |
849 | c |= 0200; | |
850 | } | |
851 | if (c == tp->t_erase) { | |
852 | if (tp->t_rawq.c_cc) | |
853 | ttyrub(unputc(&tp->t_rawq), tp); | |
854 | goto endcase; | |
855 | } | |
856 | if (c == tp->t_kill) { | |
93d2ecff | 857 | if (t_flags&CRTKIL && |
becb115c SL |
858 | tp->t_rawq.c_cc == tp->t_rocount) { |
859 | while (tp->t_rawq.c_cc) | |
860 | ttyrub(unputc(&tp->t_rawq), tp); | |
861 | } else { | |
862 | ttyecho(c, tp); | |
863 | ttyecho('\n', tp); | |
864 | while (getc(&tp->t_rawq) > 0) | |
865 | ; | |
866 | tp->t_rocount = 0; | |
867 | } | |
868 | tp->t_state &= ~TS_LOCAL; | |
869 | goto endcase; | |
870 | } | |
871 | ||
872 | /* | |
873 | * New line discipline, | |
874 | * check word erase/reprint line. | |
875 | */ | |
876 | if (tp->t_line == NTTYDISC) { | |
877 | if (c == tp->t_werasc) { | |
878 | if (tp->t_rawq.c_cc == 0) | |
879 | goto endcase; | |
880 | do { | |
881 | c = unputc(&tp->t_rawq); | |
882 | if (c != ' ' && c != '\t') | |
883 | goto erasenb; | |
884 | ttyrub(c, tp); | |
885 | } while (tp->t_rawq.c_cc); | |
886 | goto endcase; | |
887 | erasenb: | |
888 | do { | |
889 | ttyrub(c, tp); | |
890 | if (tp->t_rawq.c_cc == 0) | |
891 | goto endcase; | |
892 | c = unputc(&tp->t_rawq); | |
893 | } while (c != ' ' && c != '\t'); | |
894 | (void) putc(c, &tp->t_rawq); | |
895 | goto endcase; | |
896 | } | |
897 | if (c == tp->t_rprntc) { | |
898 | ttyretype(tp); | |
899 | goto endcase; | |
900 | } | |
901 | } | |
902 | ||
903 | /* | |
904 | * Check for input buffer overflow | |
905 | */ | |
7c9f96c0 SL |
906 | if (tp->t_rawq.c_cc+tp->t_canq.c_cc >= TTYHOG) { |
907 | if (tp->t_line == NTTYDISC) | |
908 | (void) ttyoutput(CTRL(g), tp); | |
becb115c | 909 | goto endcase; |
7c9f96c0 | 910 | } |
becb115c SL |
911 | |
912 | /* | |
913 | * Put data char in q for user and | |
914 | * wakeup on seeing a line delimiter. | |
915 | */ | |
916 | if (putc(c, &tp->t_rawq) >= 0) { | |
becb115c SL |
917 | if (ttbreakc(c, tp)) { |
918 | tp->t_rocount = 0; | |
919 | catq(&tp->t_rawq, &tp->t_canq); | |
4147b3f6 | 920 | ttwakeup(tp); |
becb115c SL |
921 | } else if (tp->t_rocount++ == 0) |
922 | tp->t_rocol = tp->t_col; | |
923 | tp->t_state &= ~TS_QUOT; | |
924 | if (c == '\\') | |
925 | tp->t_state |= TS_QUOT; | |
926 | if (tp->t_state&TS_ERASE) { | |
927 | tp->t_state &= ~TS_ERASE; | |
928 | (void) ttyoutput('/', tp); | |
929 | } | |
930 | i = tp->t_col; | |
4147b3f6 | 931 | ttyecho(c, tp); |
93d2ecff | 932 | if (c == tp->t_eofc && t_flags&ECHO) { |
becb115c SL |
933 | i = MIN(2, tp->t_col - i); |
934 | while (i > 0) { | |
935 | (void) ttyoutput('\b', tp); | |
936 | i--; | |
937 | } | |
938 | } | |
4147b3f6 | 939 | } |
becb115c SL |
940 | endcase: |
941 | /* | |
942 | * If DEC-style start/stop is enabled don't restart | |
943 | * output until seeing the start character. | |
944 | */ | |
93d2ecff | 945 | if (t_flags&DECCTQ && tp->t_state&TS_TTSTOP && |
becb115c | 946 | tp->t_startc != tp->t_stopc) |
4147b3f6 | 947 | return; |
becb115c | 948 | restartoutput: |
4147b3f6 | 949 | tp->t_state &= ~TS_TTSTOP; |
becb115c | 950 | tp->t_flags &= ~FLUSHO; |
becb115c | 951 | startoutput: |
4147b3f6 BJ |
952 | ttstart(tp); |
953 | } | |
954 | ||
955 | /* | |
becb115c | 956 | * Put character on TTY output queue, adding delays, |
4147b3f6 | 957 | * expanding tabs, and handling the CR/NL bit. |
becb115c SL |
958 | * This is called both from the top half for output, |
959 | * and from interrupt level for echoing. | |
4147b3f6 BJ |
960 | * The arguments are the character and the tty structure. |
961 | * Returns < 0 if putc succeeds, otherwise returns char to resend | |
962 | * Must be recursive. | |
963 | */ | |
964 | ttyoutput(c, tp) | |
965 | register c; | |
966 | register struct tty *tp; | |
967 | { | |
968 | register char *colp; | |
969 | register ctype; | |
970 | ||
becb115c SL |
971 | if (tp->t_flags & (RAW|LITOUT)) { |
972 | if (tp->t_flags&FLUSHO) | |
4147b3f6 BJ |
973 | return (-1); |
974 | if (putc(c, &tp->t_outq)) | |
4b72e2f9 | 975 | return (c); |
4147b3f6 BJ |
976 | tk_nout++; |
977 | return (-1); | |
978 | } | |
becb115c | 979 | |
4147b3f6 | 980 | /* |
becb115c SL |
981 | * Ignore EOT in normal mode to avoid |
982 | * hanging up certain terminals. | |
4147b3f6 BJ |
983 | */ |
984 | c &= 0177; | |
becb115c | 985 | if (c == CEOT && (tp->t_flags&CBREAK) == 0) |
4147b3f6 BJ |
986 | return (-1); |
987 | /* | |
988 | * Turn tabs to spaces as required | |
989 | */ | |
becb115c | 990 | if (c == '\t' && (tp->t_flags&TBDELAY) == XTABS) { |
4147b3f6 BJ |
991 | register int s; |
992 | ||
993 | c = 8 - (tp->t_col&7); | |
becb115c | 994 | if ((tp->t_flags&FLUSHO) == 0) { |
4f3a716e | 995 | s = spltty(); /* don't interrupt tabs */ |
4147b3f6 BJ |
996 | c -= b_to_q(" ", c, &tp->t_outq); |
997 | tk_nout += c; | |
998 | splx(s); | |
999 | } | |
1000 | tp->t_col += c; | |
1001 | return (c ? -1 : '\t'); | |
1002 | } | |
1003 | tk_nout++; | |
1004 | /* | |
1005 | * for upper-case-only terminals, | |
1006 | * generate escapes. | |
1007 | */ | |
1008 | if (tp->t_flags&LCASE) { | |
1009 | colp = "({)}!|^~'`"; | |
4b72e2f9 SL |
1010 | while (*colp++) |
1011 | if (c == *colp++) { | |
4147b3f6 BJ |
1012 | if (ttyoutput('\\', tp) >= 0) |
1013 | return (c); | |
1014 | c = colp[-2]; | |
1015 | break; | |
1016 | } | |
becb115c | 1017 | if ('A' <= c && c <= 'Z') { |
4147b3f6 BJ |
1018 | if (ttyoutput('\\', tp) >= 0) |
1019 | return (c); | |
becb115c | 1020 | } else if ('a' <= c && c <= 'z') |
4147b3f6 BJ |
1021 | c += 'A' - 'a'; |
1022 | } | |
becb115c | 1023 | |
4147b3f6 BJ |
1024 | /* |
1025 | * turn <nl> to <cr><lf> if desired. | |
1026 | */ | |
becb115c | 1027 | if (c == '\n' && tp->t_flags&CRMOD) |
4147b3f6 BJ |
1028 | if (ttyoutput('\r', tp) >= 0) |
1029 | return (c); | |
becb115c | 1030 | if (c == '~' && tp->t_flags&TILDE) |
4147b3f6 | 1031 | c = '`'; |
becb115c | 1032 | if ((tp->t_flags&FLUSHO) == 0 && putc(c, &tp->t_outq)) |
4147b3f6 BJ |
1033 | return (c); |
1034 | /* | |
1035 | * Calculate delays. | |
1036 | * The numbers here represent clock ticks | |
1037 | * and are not necessarily optimal for all terminals. | |
1038 | * The delays are indicated by characters above 0200. | |
1039 | * In raw mode there are no delays and the | |
1040 | * transmission path is 8 bits wide. | |
becb115c SL |
1041 | * |
1042 | * SHOULD JUST ALLOW USER TO SPECIFY DELAYS | |
4147b3f6 BJ |
1043 | */ |
1044 | colp = &tp->t_col; | |
1045 | ctype = partab[c]; | |
1046 | c = 0; | |
1047 | switch (ctype&077) { | |
1048 | ||
1049 | case ORDINARY: | |
1050 | (*colp)++; | |
1051 | ||
1052 | case CONTROL: | |
1053 | break; | |
1054 | ||
1055 | case BACKSPACE: | |
1056 | if (*colp) | |
1057 | (*colp)--; | |
1058 | break; | |
1059 | ||
3686c829 SL |
1060 | /* |
1061 | * This macro is close enough to the correct thing; | |
1062 | * it should be replaced by real user settable delays | |
1063 | * in any event... | |
1064 | */ | |
1065 | #define mstohz(ms) (((ms) * hz) >> 10) | |
4147b3f6 BJ |
1066 | case NEWLINE: |
1067 | ctype = (tp->t_flags >> 8) & 03; | |
4b72e2f9 | 1068 | if (ctype == 1) { /* tty 37 */ |
88a7a62a | 1069 | if (*colp > 0) |
72adddad SL |
1070 | c = max((((unsigned)*colp) >> 4) + 3, |
1071 | (unsigned)6); | |
becb115c | 1072 | } else if (ctype == 2) /* vt05 */ |
3686c829 | 1073 | c = mstohz(100); |
4147b3f6 BJ |
1074 | *colp = 0; |
1075 | break; | |
1076 | ||
1077 | case TAB: | |
1078 | ctype = (tp->t_flags >> 10) & 03; | |
4b72e2f9 | 1079 | if (ctype == 1) { /* tty 37 */ |
4147b3f6 | 1080 | c = 1 - (*colp | ~07); |
4b72e2f9 | 1081 | if (c < 5) |
4147b3f6 BJ |
1082 | c = 0; |
1083 | } | |
1084 | *colp |= 07; | |
1085 | (*colp)++; | |
1086 | break; | |
1087 | ||
1088 | case VTAB: | |
becb115c | 1089 | if (tp->t_flags&VTDELAY) /* tty 37 */ |
4147b3f6 BJ |
1090 | c = 0177; |
1091 | break; | |
1092 | ||
1093 | case RETURN: | |
1094 | ctype = (tp->t_flags >> 12) & 03; | |
becb115c | 1095 | if (ctype == 1) /* tn 300 */ |
3686c829 | 1096 | c = mstohz(83); |
becb115c | 1097 | else if (ctype == 2) /* ti 700 */ |
3686c829 | 1098 | c = mstohz(166); |
becb115c | 1099 | else if (ctype == 3) { /* concept 100 */ |
4147b3f6 | 1100 | int i; |
becb115c | 1101 | |
4147b3f6 | 1102 | if ((i = *colp) >= 0) |
becb115c | 1103 | for (; i < 9; i++) |
4147b3f6 BJ |
1104 | (void) putc(0177, &tp->t_outq); |
1105 | } | |
1106 | *colp = 0; | |
1107 | } | |
becb115c | 1108 | if (c && (tp->t_flags&FLUSHO) == 0) |
4147b3f6 BJ |
1109 | (void) putc(c|0200, &tp->t_outq); |
1110 | return (-1); | |
1111 | } | |
3686c829 | 1112 | #undef mstohz |
4147b3f6 BJ |
1113 | |
1114 | /* | |
1115 | * Called from device's read routine after it has | |
1116 | * calculated the tty-structure given as argument. | |
1117 | */ | |
d6d7360b | 1118 | ttread(tp, uio) |
4b72e2f9 | 1119 | register struct tty *tp; |
d6d7360b | 1120 | struct uio *uio; |
4147b3f6 BJ |
1121 | { |
1122 | register struct clist *qp; | |
becb115c | 1123 | register c, t_flags; |
875a1e2c | 1124 | int s, first, error = 0; |
4147b3f6 | 1125 | |
4147b3f6 | 1126 | loop: |
becb115c SL |
1127 | /* |
1128 | * Take any pending input first. | |
1129 | */ | |
4f3a716e | 1130 | s = spltty(); |
becb115c | 1131 | if (tp->t_flags&PENDIN) |
4147b3f6 | 1132 | ttypend(tp); |
875a1e2c | 1133 | splx(s); |
becb115c | 1134 | |
58786a81 JB |
1135 | if ((tp->t_state&TS_CARR_ON)==0) |
1136 | return (EIO); | |
1137 | ||
becb115c SL |
1138 | /* |
1139 | * Hang process if it's in the background. | |
1140 | */ | |
58786a81 | 1141 | if (tp == u.u_ttyp && u.u_procp->p_pgrp != tp->t_pgrp) { |
52c041cd MK |
1142 | if ((u.u_procp->p_sigignore & sigmask(SIGTTIN)) || |
1143 | (u.u_procp->p_sigmask & sigmask(SIGTTIN)) || | |
4147b3f6 | 1144 | u.u_procp->p_flag&SVFORK) |
840510a3 | 1145 | return (EIO); |
4147b3f6 BJ |
1146 | gsignal(u.u_procp->p_pgrp, SIGTTIN); |
1147 | sleep((caddr_t)&lbolt, TTIPRI); | |
58786a81 | 1148 | goto loop; |
4147b3f6 | 1149 | } |
becb115c SL |
1150 | t_flags = tp->t_flags; |
1151 | ||
1152 | /* | |
1153 | * In raw mode take characters directly from the | |
1154 | * raw queue w/o processing. Interlock against | |
1155 | * device interrupts when interrogating rawq. | |
1156 | */ | |
1157 | if (t_flags&RAW) { | |
4f3a716e | 1158 | s = spltty(); |
4147b3f6 | 1159 | if (tp->t_rawq.c_cc <= 0) { |
becb115c | 1160 | if ((tp->t_state&TS_CARR_ON) == 0 || |
4147b3f6 | 1161 | (tp->t_state&TS_NBIO)) { |
875a1e2c | 1162 | splx(s); |
e0d1a4cb | 1163 | return (EWOULDBLOCK); |
4147b3f6 BJ |
1164 | } |
1165 | sleep((caddr_t)&tp->t_rawq, TTIPRI); | |
875a1e2c | 1166 | splx(s); |
4147b3f6 BJ |
1167 | goto loop; |
1168 | } | |
875a1e2c | 1169 | splx(s); |
9ec65acb KM |
1170 | while (!error && tp->t_rawq.c_cc && uio->uio_resid) |
1171 | error = ureadc(getc(&tp->t_rawq), uio); | |
875a1e2c | 1172 | goto checktandem; |
becb115c SL |
1173 | } |
1174 | ||
1175 | /* | |
1176 | * In cbreak mode use the rawq, otherwise | |
1177 | * take characters from the canonicalized q. | |
1178 | */ | |
1179 | qp = t_flags&CBREAK ? &tp->t_rawq : &tp->t_canq; | |
1180 | ||
1181 | /* | |
1182 | * No input, sleep on rawq awaiting hardware | |
1183 | * receipt and notification. | |
1184 | */ | |
4f3a716e | 1185 | s = spltty(); |
becb115c SL |
1186 | if (qp->c_cc <= 0) { |
1187 | if ((tp->t_state&TS_CARR_ON) == 0 || | |
1188 | (tp->t_state&TS_NBIO)) { | |
875a1e2c | 1189 | splx(s); |
becb115c | 1190 | return (EWOULDBLOCK); |
4147b3f6 | 1191 | } |
becb115c | 1192 | sleep((caddr_t)&tp->t_rawq, TTIPRI); |
875a1e2c | 1193 | splx(s); |
becb115c SL |
1194 | goto loop; |
1195 | } | |
875a1e2c | 1196 | splx(s); |
becb115c SL |
1197 | |
1198 | /* | |
1199 | * Input present, perform input mapping | |
1200 | * and processing (we're not in raw mode). | |
1201 | */ | |
1202 | first = 1; | |
1203 | while ((c = getc(qp)) >= 0) { | |
1204 | if (t_flags&CRMOD && c == '\r') | |
1205 | c = '\n'; | |
becb115c SL |
1206 | /* |
1207 | * Check for delayed suspend character. | |
1208 | */ | |
1209 | if (tp->t_line == NTTYDISC && c == tp->t_dsuspc) { | |
1210 | gsignal(tp->t_pgrp, SIGTSTP); | |
1211 | if (first) { | |
1212 | sleep((caddr_t)&lbolt, TTIPRI); | |
1213 | goto loop; | |
1214 | } | |
1215 | break; | |
4147b3f6 | 1216 | } |
becb115c SL |
1217 | /* |
1218 | * Interpret EOF only in cooked mode. | |
1219 | */ | |
1220 | if (c == tp->t_eofc && (t_flags&CBREAK) == 0) | |
1221 | break; | |
1222 | /* | |
1223 | * Give user character. | |
1224 | */ | |
fb01874e | 1225 | error = ureadc(t_flags&PASS8 ? c : c & 0177, uio); |
becb115c SL |
1226 | if (error) |
1227 | break; | |
9ec65acb | 1228 | if (uio->uio_resid == 0) |
becb115c SL |
1229 | break; |
1230 | /* | |
1231 | * In cooked mode check for a "break character" | |
1232 | * marking the end of a "line of input". | |
1233 | */ | |
1234 | if ((t_flags&CBREAK) == 0 && ttbreakc(c, tp)) | |
1235 | break; | |
1236 | first = 0; | |
4147b3f6 | 1237 | } |
becb115c | 1238 | |
875a1e2c | 1239 | checktandem: |
becb115c SL |
1240 | /* |
1241 | * Look to unblock output now that (presumably) | |
1242 | * the input queue has gone down. | |
1243 | */ | |
875a1e2c | 1244 | if (tp->t_state&TS_TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) |
becb115c | 1245 | if (putc(tp->t_startc, &tp->t_outq) == 0) { |
4147b3f6 BJ |
1246 | tp->t_state &= ~TS_TBLOCK; |
1247 | ttstart(tp); | |
1248 | } | |
840510a3 | 1249 | return (error); |
4147b3f6 BJ |
1250 | } |
1251 | ||
605d7712 MK |
1252 | /* |
1253 | * Check the output queue on tp for space for a kernel message | |
1254 | * (from uprintf/tprintf). Allow some space over the normal | |
1255 | * hiwater mark so we don't lose messages due to normal flow | |
1256 | * control, but don't let the tty run amok. | |
1257 | */ | |
1258 | ttycheckoutq(tp, wait) | |
1259 | register struct tty *tp; | |
1260 | int wait; | |
1261 | { | |
1262 | int hiwat, s; | |
1263 | ||
1264 | hiwat = TTHIWAT(tp); | |
1265 | s = spltty(); | |
1266 | if (tp->t_outq.c_cc > hiwat + 200) | |
1267 | while (tp->t_outq.c_cc > hiwat) { | |
1268 | ttstart(tp); | |
1269 | if (wait == 0) { | |
1270 | splx(s); | |
1271 | return (0); | |
1272 | } | |
1273 | tp->t_state |= TS_ASLEEP; | |
1274 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
1275 | } | |
1276 | splx(s); | |
1277 | return (1); | |
1278 | } | |
1279 | ||
4147b3f6 BJ |
1280 | /* |
1281 | * Called from the device's write routine after it has | |
1282 | * calculated the tty-structure given as argument. | |
1283 | */ | |
913ea2d1 | 1284 | ttwrite(tp, uio) |
4b72e2f9 | 1285 | register struct tty *tp; |
becb115c | 1286 | register struct uio *uio; |
4147b3f6 | 1287 | { |
4147b3f6 | 1288 | register char *cp; |
becb115c SL |
1289 | register int cc, ce, c; |
1290 | int i, hiwat, cnt, error, s; | |
4147b3f6 | 1291 | char obuf[OBUFSIZ]; |
4147b3f6 | 1292 | |
becb115c SL |
1293 | hiwat = TTHIWAT(tp); |
1294 | cnt = uio->uio_resid; | |
1295 | error = 0; | |
4147b3f6 | 1296 | loop: |
93d2ecff JB |
1297 | if ((tp->t_state&TS_CARR_ON) == 0) |
1298 | return (EIO); | |
becb115c SL |
1299 | /* |
1300 | * Hang the process if it's in the background. | |
1301 | */ | |
93d2ecff | 1302 | if (u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && |
becb115c | 1303 | (tp->t_flags&TOSTOP) && (u.u_procp->p_flag&SVFORK)==0 && |
52c041cd MK |
1304 | !(u.u_procp->p_sigignore & sigmask(SIGTTOU)) && |
1305 | !(u.u_procp->p_sigmask & sigmask(SIGTTOU))) { | |
4147b3f6 BJ |
1306 | gsignal(u.u_procp->p_pgrp, SIGTTOU); |
1307 | sleep((caddr_t)&lbolt, TTIPRI); | |
93d2ecff | 1308 | goto loop; |
4147b3f6 | 1309 | } |
becb115c SL |
1310 | |
1311 | /* | |
1312 | * Process the user's data in at most OBUFSIZ | |
1313 | * chunks. Perform lower case simulation and | |
1314 | * similar hacks. Keep track of high water | |
1315 | * mark, sleep on overflow awaiting device aid | |
1316 | * in acquiring new space. | |
1317 | */ | |
913ea2d1 | 1318 | while (uio->uio_resid > 0) { |
becb115c SL |
1319 | /* |
1320 | * Grab a hunk of data from the user. | |
1321 | */ | |
913ea2d1 BJ |
1322 | cc = uio->uio_iov->iov_len; |
1323 | if (cc == 0) { | |
1324 | uio->uio_iovcnt--; | |
1325 | uio->uio_iov++; | |
93d2ecff | 1326 | if (uio->uio_iovcnt <= 0) |
913ea2d1 BJ |
1327 | panic("ttwrite"); |
1328 | continue; | |
1329 | } | |
1330 | if (cc > OBUFSIZ) | |
1331 | cc = OBUFSIZ; | |
4147b3f6 | 1332 | cp = obuf; |
88a7a62a | 1333 | error = uiomove(cp, cc, UIO_WRITE, uio); |
840510a3 | 1334 | if (error) |
4147b3f6 BJ |
1335 | break; |
1336 | if (tp->t_outq.c_cc > hiwat) | |
1337 | goto ovhiwat; | |
becb115c | 1338 | if (tp->t_flags&FLUSHO) |
4147b3f6 | 1339 | continue; |
becb115c SL |
1340 | /* |
1341 | * If we're mapping lower case or kludging tildes, | |
1342 | * then we've got to look at each character, so | |
1343 | * just feed the stuff to ttyoutput... | |
1344 | */ | |
1345 | if (tp->t_flags & (LCASE|TILDE)) { | |
1346 | while (cc > 0) { | |
4147b3f6 BJ |
1347 | c = *cp++; |
1348 | tp->t_rocount = 0; | |
4b72e2f9 | 1349 | while ((c = ttyoutput(c, tp)) >= 0) { |
4147b3f6 BJ |
1350 | /* out of clists, wait a bit */ |
1351 | ttstart(tp); | |
1352 | sleep((caddr_t)&lbolt, TTOPRI); | |
1353 | tp->t_rocount = 0; | |
93d2ecff JB |
1354 | if (cc != 0) { |
1355 | uio->uio_iov->iov_base -= cc; | |
1356 | uio->uio_iov->iov_len += cc; | |
1357 | uio->uio_resid += cc; | |
1358 | uio->uio_offset -= cc; | |
1359 | } | |
1360 | goto loop; | |
4147b3f6 BJ |
1361 | } |
1362 | --cc; | |
1363 | if (tp->t_outq.c_cc > hiwat) | |
1364 | goto ovhiwat; | |
1365 | } | |
1366 | continue; | |
1367 | } | |
becb115c SL |
1368 | /* |
1369 | * If nothing fancy need be done, grab those characters we | |
1370 | * can handle without any of ttyoutput's processing and | |
1371 | * just transfer them to the output q. For those chars | |
1372 | * which require special processing (as indicated by the | |
1373 | * bits in partab), call ttyoutput. After processing | |
1374 | * a hunk of data, look for FLUSHO so ^O's will take effect | |
1375 | * immediately. | |
1376 | */ | |
1377 | while (cc > 0) { | |
1378 | if (tp->t_flags & (RAW|LITOUT)) | |
4147b3f6 BJ |
1379 | ce = cc; |
1380 | else { | |
88a7a62a SL |
1381 | ce = cc - scanc((unsigned)cc, (caddr_t)cp, |
1382 | (caddr_t)partab, 077); | |
becb115c SL |
1383 | /* |
1384 | * If ce is zero, then we're processing | |
1385 | * a special character through ttyoutput. | |
1386 | */ | |
1387 | if (ce == 0) { | |
4147b3f6 BJ |
1388 | tp->t_rocount = 0; |
1389 | if (ttyoutput(*cp, tp) >= 0) { | |
93d2ecff JB |
1390 | /* no c-lists, wait a bit */ |
1391 | ttstart(tp); | |
1392 | sleep((caddr_t)&lbolt, TTOPRI); | |
1393 | if (cc != 0) { | |
1394 | uio->uio_iov->iov_base -= cc; | |
1395 | uio->uio_iov->iov_len += cc; | |
1396 | uio->uio_resid += cc; | |
1397 | uio->uio_offset -= cc; | |
1398 | } | |
1399 | goto loop; | |
4147b3f6 | 1400 | } |
becb115c SL |
1401 | cp++, cc--; |
1402 | if (tp->t_flags&FLUSHO || | |
1403 | tp->t_outq.c_cc > hiwat) | |
4147b3f6 | 1404 | goto ovhiwat; |
becb115c | 1405 | continue; |
4147b3f6 BJ |
1406 | } |
1407 | } | |
becb115c SL |
1408 | /* |
1409 | * A bunch of normal characters have been found, | |
1410 | * transfer them en masse to the output queue and | |
1411 | * continue processing at the top of the loop. | |
1412 | * If there are any further characters in this | |
1413 | * <= OBUFSIZ chunk, the first should be a character | |
1414 | * requiring special handling by ttyoutput. | |
1415 | */ | |
4147b3f6 | 1416 | tp->t_rocount = 0; |
becb115c SL |
1417 | i = b_to_q(cp, ce, &tp->t_outq); |
1418 | ce -= i; | |
1419 | tp->t_col += ce; | |
1420 | cp += ce, cc -= ce, tk_nout += ce; | |
1421 | if (i > 0) { | |
1422 | /* out of c-lists, wait a bit */ | |
4147b3f6 BJ |
1423 | ttstart(tp); |
1424 | sleep((caddr_t)&lbolt, TTOPRI); | |
93d2ecff JB |
1425 | uio->uio_iov->iov_base -= cc; |
1426 | uio->uio_iov->iov_len += cc; | |
1427 | uio->uio_resid += cc; | |
1428 | uio->uio_offset -= cc; | |
1429 | goto loop; | |
4147b3f6 | 1430 | } |
becb115c | 1431 | if (tp->t_flags&FLUSHO || tp->t_outq.c_cc > hiwat) |
4147b3f6 BJ |
1432 | goto ovhiwat; |
1433 | } | |
1434 | } | |
1435 | ttstart(tp); | |
840510a3 | 1436 | return (error); |
4147b3f6 BJ |
1437 | |
1438 | ovhiwat: | |
4f3a716e | 1439 | s = spltty(); |
becb115c SL |
1440 | if (cc != 0) { |
1441 | uio->uio_iov->iov_base -= cc; | |
1442 | uio->uio_iov->iov_len += cc; | |
1443 | uio->uio_resid += cc; | |
1444 | uio->uio_offset -= cc; | |
1445 | } | |
1446 | /* | |
1447 | * This can only occur if FLUSHO | |
1448 | * is also set in t_flags. | |
1449 | */ | |
4147b3f6 | 1450 | if (tp->t_outq.c_cc <= hiwat) { |
becb115c | 1451 | splx(s); |
4147b3f6 BJ |
1452 | goto loop; |
1453 | } | |
1454 | ttstart(tp); | |
becb115c | 1455 | if (tp->t_state&TS_NBIO) { |
4f3a716e | 1456 | splx(s); |
913ea2d1 | 1457 | if (uio->uio_resid == cnt) |
840510a3 BJ |
1458 | return (EWOULDBLOCK); |
1459 | return (0); | |
4147b3f6 BJ |
1460 | } |
1461 | tp->t_state |= TS_ASLEEP; | |
1462 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
becb115c | 1463 | splx(s); |
4147b3f6 BJ |
1464 | goto loop; |
1465 | } | |
1466 | ||
1467 | /* | |
1468 | * Rubout one character from the rawq of tp | |
1469 | * as cleanly as possible. | |
1470 | */ | |
1471 | ttyrub(c, tp) | |
4b72e2f9 SL |
1472 | register c; |
1473 | register struct tty *tp; | |
4147b3f6 BJ |
1474 | { |
1475 | register char *cp; | |
1476 | register int savecol; | |
1477 | int s; | |
1478 | char *nextc(); | |
1479 | ||
becb115c | 1480 | if ((tp->t_flags&ECHO) == 0) |
4147b3f6 | 1481 | return; |
becb115c | 1482 | tp->t_flags &= ~FLUSHO; |
4147b3f6 | 1483 | c &= 0377; |
becb115c | 1484 | if (tp->t_flags&CRTBS) { |
4147b3f6 BJ |
1485 | if (tp->t_rocount == 0) { |
1486 | /* | |
1487 | * Screwed by ttwrite; retype | |
1488 | */ | |
1489 | ttyretype(tp); | |
1490 | return; | |
1491 | } | |
becb115c | 1492 | if (c == ('\t'|0200) || c == ('\n'|0200)) |
4147b3f6 | 1493 | ttyrubo(tp, 2); |
becb115c | 1494 | else switch (partab[c&=0177]&0177) { |
4147b3f6 BJ |
1495 | |
1496 | case ORDINARY: | |
1497 | if (tp->t_flags&LCASE && c >= 'A' && c <= 'Z') | |
1498 | ttyrubo(tp, 2); | |
1499 | else | |
1500 | ttyrubo(tp, 1); | |
1501 | break; | |
1502 | ||
1503 | case VTAB: | |
1504 | case BACKSPACE: | |
1505 | case CONTROL: | |
1506 | case RETURN: | |
becb115c | 1507 | if (tp->t_flags&CTLECH) |
4147b3f6 BJ |
1508 | ttyrubo(tp, 2); |
1509 | break; | |
1510 | ||
1511 | case TAB: | |
1512 | if (tp->t_rocount < tp->t_rawq.c_cc) { | |
1513 | ttyretype(tp); | |
1514 | return; | |
1515 | } | |
4f3a716e | 1516 | s = spltty(); |
4147b3f6 | 1517 | savecol = tp->t_col; |
becb115c SL |
1518 | tp->t_state |= TS_CNTTB; |
1519 | tp->t_flags |= FLUSHO; | |
4147b3f6 | 1520 | tp->t_col = tp->t_rocol; |
becb115c SL |
1521 | cp = tp->t_rawq.c_cf; |
1522 | for (; cp; cp = nextc(&tp->t_rawq, cp)) | |
4147b3f6 | 1523 | ttyecho(*cp, tp); |
becb115c SL |
1524 | tp->t_flags &= ~FLUSHO; |
1525 | tp->t_state &= ~TS_CNTTB; | |
4147b3f6 BJ |
1526 | splx(s); |
1527 | /* | |
1528 | * savecol will now be length of the tab | |
1529 | */ | |
1530 | savecol -= tp->t_col; | |
1531 | tp->t_col += savecol; | |
1532 | if (savecol > 8) | |
1533 | savecol = 8; /* overflow screw */ | |
1534 | while (--savecol >= 0) | |
1535 | (void) ttyoutput('\b', tp); | |
1536 | break; | |
1537 | ||
1538 | default: | |
1539 | panic("ttyrub"); | |
1540 | } | |
becb115c SL |
1541 | } else if (tp->t_flags&PRTERA) { |
1542 | if ((tp->t_state&TS_ERASE) == 0) { | |
4147b3f6 | 1543 | (void) ttyoutput('\\', tp); |
becb115c | 1544 | tp->t_state |= TS_ERASE; |
4147b3f6 BJ |
1545 | } |
1546 | ttyecho(c, tp); | |
1547 | } else | |
1548 | ttyecho(tp->t_erase, tp); | |
1549 | tp->t_rocount--; | |
1550 | } | |
1551 | ||
1552 | /* | |
1553 | * Crt back over cnt chars perhaps | |
1554 | * erasing them. | |
1555 | */ | |
1556 | ttyrubo(tp, cnt) | |
4b72e2f9 SL |
1557 | register struct tty *tp; |
1558 | int cnt; | |
4147b3f6 | 1559 | { |
becb115c | 1560 | register char *rubostring = tp->t_flags&CRTERA ? "\b \b" : "\b"; |
4147b3f6 BJ |
1561 | |
1562 | while (--cnt >= 0) | |
becb115c | 1563 | ttyout(rubostring, tp); |
4147b3f6 BJ |
1564 | } |
1565 | ||
1566 | /* | |
1567 | * Reprint the rawq line. | |
1568 | * We assume c_cc has already been checked. | |
1569 | */ | |
1570 | ttyretype(tp) | |
4b72e2f9 | 1571 | register struct tty *tp; |
4147b3f6 BJ |
1572 | { |
1573 | register char *cp; | |
1574 | char *nextc(); | |
1575 | int s; | |
1576 | ||
becb115c SL |
1577 | if (tp->t_rprntc != 0377) |
1578 | ttyecho(tp->t_rprntc, tp); | |
4147b3f6 | 1579 | (void) ttyoutput('\n', tp); |
4f3a716e | 1580 | s = spltty(); |
4147b3f6 BJ |
1581 | for (cp = tp->t_canq.c_cf; cp; cp = nextc(&tp->t_canq, cp)) |
1582 | ttyecho(*cp, tp); | |
1583 | for (cp = tp->t_rawq.c_cf; cp; cp = nextc(&tp->t_rawq, cp)) | |
1584 | ttyecho(*cp, tp); | |
becb115c | 1585 | tp->t_state &= ~TS_ERASE; |
4147b3f6 BJ |
1586 | splx(s); |
1587 | tp->t_rocount = tp->t_rawq.c_cc; | |
1588 | tp->t_rocol = 0; | |
1589 | } | |
1590 | ||
1591 | /* | |
1592 | * Echo a typed character to the terminal | |
1593 | */ | |
1594 | ttyecho(c, tp) | |
4b72e2f9 SL |
1595 | register c; |
1596 | register struct tty *tp; | |
4147b3f6 BJ |
1597 | { |
1598 | ||
becb115c SL |
1599 | if ((tp->t_state&TS_CNTTB) == 0) |
1600 | tp->t_flags &= ~FLUSHO; | |
4147b3f6 BJ |
1601 | if ((tp->t_flags&ECHO) == 0) |
1602 | return; | |
1603 | c &= 0377; | |
1604 | if (tp->t_flags&RAW) { | |
1605 | (void) ttyoutput(c, tp); | |
1606 | return; | |
1607 | } | |
1608 | if (c == '\r' && tp->t_flags&CRMOD) | |
1609 | c = '\n'; | |
becb115c | 1610 | if (tp->t_flags&CTLECH) { |
4147b3f6 BJ |
1611 | if ((c&0177) <= 037 && c!='\t' && c!='\n' || (c&0177)==0177) { |
1612 | (void) ttyoutput('^', tp); | |
1613 | c &= 0177; | |
1614 | if (c == 0177) | |
1615 | c = '?'; | |
1616 | else if (tp->t_flags&LCASE) | |
1617 | c += 'a' - 1; | |
1618 | else | |
1619 | c += 'A' - 1; | |
1620 | } | |
1621 | } | |
becb115c | 1622 | (void) ttyoutput(c&0177, tp); |
4147b3f6 BJ |
1623 | } |
1624 | ||
1625 | /* | |
1626 | * Is c a break char for tp? | |
1627 | */ | |
1628 | ttbreakc(c, tp) | |
4b72e2f9 SL |
1629 | register c; |
1630 | register struct tty *tp; | |
4147b3f6 | 1631 | { |
becb115c | 1632 | return (c == '\n' || c == tp->t_eofc || c == tp->t_brkc || |
4147b3f6 BJ |
1633 | c == '\r' && (tp->t_flags&CRMOD)); |
1634 | } | |
1635 | ||
1636 | /* | |
1637 | * send string cp to tp | |
1638 | */ | |
1639 | ttyout(cp, tp) | |
4b72e2f9 SL |
1640 | register char *cp; |
1641 | register struct tty *tp; | |
4147b3f6 BJ |
1642 | { |
1643 | register char c; | |
1644 | ||
1645 | while (c = *cp++) | |
1646 | (void) ttyoutput(c, tp); | |
1647 | } | |
1648 | ||
1649 | ttwakeup(tp) | |
1650 | struct tty *tp; | |
1651 | { | |
1652 | ||
1653 | if (tp->t_rsel) { | |
1654 | selwakeup(tp->t_rsel, tp->t_state&TS_RCOLL); | |
1655 | tp->t_state &= ~TS_RCOLL; | |
1656 | tp->t_rsel = 0; | |
1657 | } | |
88a7a62a SL |
1658 | if (tp->t_state & TS_ASYNC) |
1659 | gsignal(tp->t_pgrp, SIGIO); | |
4147b3f6 BJ |
1660 | wakeup((caddr_t)&tp->t_rawq); |
1661 | } |