Commit | Line | Data |
---|---|---|
da7c5cc6 | 1 | /* |
0880b18e | 2 | * Copyright (c) 1982, 1986 Regents of the University of California. |
da7c5cc6 KM |
3 | * All rights reserved. The Berkeley software License Agreement |
4 | * specifies the terms and conditions for redistribution. | |
5 | * | |
1eebc1a7 | 6 | * @(#)tty.c 7.10 (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" | |
94368568 JB |
18 | #include "file.h" |
19 | #include "conf.h" | |
fb1db32c | 20 | #include "dkstat.h" |
94368568 JB |
21 | #include "uio.h" |
22 | #include "kernel.h" | |
89dc6dfb | 23 | |
8bba2b8f RE |
24 | /* |
25 | * Table giving parity for characters and indicating | |
26 | * character classes to tty driver. In particular, | |
27 | * if the low 6 bits are 0, then the character needs | |
28 | * no special processing on output. | |
29 | */ | |
30 | ||
31 | char partab[] = { | |
32 | 0001,0201,0201,0001,0201,0001,0001,0201, | |
33 | 0202,0004,0003,0201,0005,0206,0201,0001, | |
34 | 0201,0001,0001,0201,0001,0201,0201,0001, | |
35 | 0001,0201,0201,0001,0201,0001,0001,0201, | |
36 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
37 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
38 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
39 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
40 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
41 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
42 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
43 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
44 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
45 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
46 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
47 | 0000,0200,0200,0000,0200,0000,0000,0201, | |
48 | ||
49 | /* | |
50 | * 7 bit ascii ends with the last character above, | |
51 | * but we contine through all 256 codes for the sake | |
52 | * of the tty output routines which use special vax | |
53 | * instructions which need a 256 character trt table. | |
54 | */ | |
55 | ||
56 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
57 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
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 | }; | |
89dc6dfb | 73 | |
89dc6dfb BJ |
74 | /* |
75 | * Input mapping table-- if an entry is non-zero, when the | |
76 | * corresponding character is typed preceded by "\" the escape | |
77 | * sequence is replaced by the table value. Mostly used for | |
78 | * upper-case only terminals. | |
79 | */ | |
89dc6dfb BJ |
80 | char maptab[] ={ |
81 | 000,000,000,000,000,000,000,000, | |
82 | 000,000,000,000,000,000,000,000, | |
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,'`', | |
86 | '{','}',000,000,000,000,000,000, | |
87 | 000,000,000,000,000,000,000,000, | |
88 | 000,000,000,000,000,000,000,000, | |
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, | |
93 | 000,'A','B','C','D','E','F','G', | |
94 | 'H','I','J','K','L','M','N','O', | |
95 | 'P','Q','R','S','T','U','V','W', | |
96 | 'X','Y','Z',000,000,000,000,000, | |
97 | }; | |
98 | ||
0d65848d | 99 | short tthiwat[16] = |
6f21eede | 100 | { 100,100,100,100,100,100,100,200,200,400,400,400,650,650,1300,2000 }; |
0d65848d BJ |
101 | short ttlowat[16] = |
102 | { 30, 30, 30, 30, 30, 30, 30, 50, 50,120,120,120,125,125,125,125 }; | |
103 | ||
becb115c SL |
104 | struct ttychars ttydefaults = { |
105 | CERASE, CKILL, CINTR, CQUIT, CSTART, CSTOP, CEOF, | |
106 | CBRK, CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE,CLNEXT | |
107 | }; | |
89dc6dfb | 108 | |
adf4bc89 MK |
109 | extern struct tty *constty; /* temporary virtual console */ |
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) && |
9670d122 | 135 | tp->t_state&TS_CARR_ON && tp->t_oproc) { |
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 | { |
8062c8a7 | 225 | |
b482b2c8 | 226 | if (tp->t_oproc) /* kludge for pty */ |
50e2732b | 227 | (*tp->t_oproc)(tp); |
89dc6dfb BJ |
228 | } |
229 | ||
230 | /* | |
50e2732b | 231 | * Common code for tty ioctls. |
89dc6dfb | 232 | */ |
49c84d3f | 233 | /*ARGSUSED*/ |
4b72e2f9 SL |
234 | ttioctl(tp, com, data, flag) |
235 | register struct tty *tp; | |
236 | caddr_t data; | |
89dc6dfb | 237 | { |
840510a3 | 238 | int dev = tp->t_dev; |
89dc6dfb | 239 | extern int nldisp; |
fc6972ae | 240 | int s; |
88a7a62a | 241 | register int newflags; |
89dc6dfb | 242 | |
adf4bc89 | 243 | |
50e2732b BJ |
244 | /* |
245 | * If the ioctl involves modification, | |
4f3a716e | 246 | * hang if in the background. |
50e2732b | 247 | */ |
4b72e2f9 | 248 | switch (com) { |
50e2732b | 249 | |
c6fe3a50 BJ |
250 | case TIOCSETD: |
251 | case TIOCSETP: | |
252 | case TIOCSETN: | |
50e2732b BJ |
253 | case TIOCFLUSH: |
254 | case TIOCSETC: | |
255 | case TIOCSLTC: | |
256 | case TIOCSPGRP: | |
257 | case TIOCLBIS: | |
258 | case TIOCLBIC: | |
259 | case TIOCLSET: | |
8203fe05 | 260 | case TIOCSTI: |
f9eea644 | 261 | case TIOCSWINSZ: |
50e2732b BJ |
262 | while (tp->t_line == NTTYDISC && |
263 | u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && | |
264 | (u.u_procp->p_flag&SVFORK) == 0 && | |
52c041cd MK |
265 | !(u.u_procp->p_sigignore & sigmask(SIGTTOU)) && |
266 | !(u.u_procp->p_sigmask & sigmask(SIGTTOU))) { | |
50e2732b BJ |
267 | gsignal(u.u_procp->p_pgrp, SIGTTOU); |
268 | sleep((caddr_t)&lbolt, TTOPRI); | |
269 | } | |
270 | break; | |
271 | } | |
272 | ||
becb115c SL |
273 | /* |
274 | * Process the ioctl. | |
275 | */ | |
4b72e2f9 | 276 | switch (com) { |
89dc6dfb | 277 | |
fc6972ae | 278 | /* get discipline number */ |
89dc6dfb | 279 | case TIOCGETD: |
4b72e2f9 | 280 | *(int *)data = tp->t_line; |
89dc6dfb BJ |
281 | break; |
282 | ||
fc6972ae | 283 | /* set line discipline */ |
4b72e2f9 SL |
284 | case TIOCSETD: { |
285 | register int t = *(int *)data; | |
becb115c | 286 | int error = 0; |
4b72e2f9 | 287 | |
9b905352 | 288 | if ((unsigned) t >= nldisp) |
4a003df3 | 289 | return (ENXIO); |
2eaeef4d MK |
290 | if (t != tp->t_line) { |
291 | s = spltty(); | |
292 | (*linesw[tp->t_line].l_close)(tp); | |
293 | error = (*linesw[t].l_open)(dev, tp); | |
294 | if (error) { | |
295 | (void) (*linesw[tp->t_line].l_open)(dev, tp); | |
296 | splx(s); | |
297 | return (error); | |
298 | } | |
299 | tp->t_line = t; | |
4a003df3 | 300 | splx(s); |
4a003df3 | 301 | } |
89dc6dfb | 302 | break; |
4b72e2f9 | 303 | } |
89dc6dfb | 304 | |
fc6972ae | 305 | /* prevent more opens on channel */ |
152c2598 BJ |
306 | case TIOCEXCL: |
307 | tp->t_state |= TS_XCLUDE; | |
308 | break; | |
309 | ||
310 | case TIOCNXCL: | |
311 | tp->t_state &= ~TS_XCLUDE; | |
312 | break; | |
313 | ||
fc6972ae | 314 | /* hang up line on last close */ |
89dc6dfb | 315 | case TIOCHPCL: |
941944c9 | 316 | tp->t_state |= TS_HUPCLS; |
89dc6dfb BJ |
317 | break; |
318 | ||
7d973a4d | 319 | case TIOCFLUSH: { |
4b72e2f9 SL |
320 | register int flags = *(int *)data; |
321 | ||
322 | if (flags == 0) | |
7d973a4d | 323 | flags = FREAD|FWRITE; |
4b72e2f9 SL |
324 | else |
325 | flags &= FREAD|FWRITE; | |
88a7a62a | 326 | ttyflush(tp, flags); |
89dc6dfb | 327 | break; |
4568c08e | 328 | } |
89dc6dfb | 329 | |
fc6972ae | 330 | /* return number of characters immediately available */ |
4b72e2f9 SL |
331 | case FIONREAD: |
332 | *(off_t *)data = ttnread(tp); | |
8062c8a7 | 333 | break; |
8062c8a7 | 334 | |
b968e450 SL |
335 | case TIOCOUTQ: |
336 | *(int *)data = tp->t_outq.c_cc; | |
337 | break; | |
338 | ||
a8d3bf7f | 339 | case TIOCSTOP: |
4f3a716e | 340 | s = spltty(); |
becb115c | 341 | if ((tp->t_state&TS_TTSTOP) == 0) { |
bfcf09ee BJ |
342 | tp->t_state |= TS_TTSTOP; |
343 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
344 | } | |
4b72e2f9 | 345 | splx(s); |
bfcf09ee BJ |
346 | break; |
347 | ||
a8d3bf7f | 348 | case TIOCSTART: |
4f3a716e | 349 | s = spltty(); |
becb115c | 350 | if ((tp->t_state&TS_TTSTOP) || (tp->t_flags&FLUSHO)) { |
bfcf09ee | 351 | tp->t_state &= ~TS_TTSTOP; |
becb115c | 352 | tp->t_flags &= ~FLUSHO; |
bfcf09ee BJ |
353 | ttstart(tp); |
354 | } | |
4b72e2f9 | 355 | splx(s); |
bfcf09ee BJ |
356 | break; |
357 | ||
8203fe05 SL |
358 | /* |
359 | * Simulate typing of a character at the terminal. | |
360 | */ | |
361 | case TIOCSTI: | |
477d62ec KM |
362 | if (u.u_uid && (flag & FREAD) == 0) |
363 | return (EPERM); | |
8203fe05 SL |
364 | if (u.u_uid && u.u_ttyp != tp) |
365 | return (EACCES); | |
becb115c | 366 | (*linesw[tp->t_line].l_rint)(*(char *)data, tp); |
8203fe05 SL |
367 | break; |
368 | ||
88a7a62a SL |
369 | case TIOCSETP: |
370 | case TIOCSETN: { | |
371 | register struct sgttyb *sg = (struct sgttyb *)data; | |
372 | ||
373 | tp->t_erase = sg->sg_erase; | |
374 | tp->t_kill = sg->sg_kill; | |
375 | tp->t_ispeed = sg->sg_ispeed; | |
376 | tp->t_ospeed = sg->sg_ospeed; | |
377 | newflags = (tp->t_flags&0xffff0000) | (sg->sg_flags&0xffff); | |
4f3a716e | 378 | s = spltty(); |
88a7a62a SL |
379 | if (tp->t_flags&RAW || newflags&RAW || com == TIOCSETP) { |
380 | ttywait(tp); | |
381 | ttyflush(tp, FREAD); | |
382 | } else if ((tp->t_flags&CBREAK) != (newflags&CBREAK)) { | |
383 | if (newflags&CBREAK) { | |
384 | struct clist tq; | |
385 | ||
386 | catq(&tp->t_rawq, &tp->t_canq); | |
387 | tq = tp->t_rawq; | |
388 | tp->t_rawq = tp->t_canq; | |
389 | tp->t_canq = tq; | |
390 | } else { | |
391 | tp->t_flags |= PENDIN; | |
096b7e95 | 392 | newflags |= PENDIN; |
88a7a62a SL |
393 | ttwakeup(tp); |
394 | } | |
395 | } | |
396 | tp->t_flags = newflags; | |
397 | if (tp->t_flags&RAW) { | |
398 | tp->t_state &= ~TS_TTSTOP; | |
399 | ttstart(tp); | |
400 | } | |
401 | splx(s); | |
402 | break; | |
403 | } | |
404 | ||
405 | /* send current parameters to user */ | |
406 | case TIOCGETP: { | |
407 | register struct sgttyb *sg = (struct sgttyb *)data; | |
408 | ||
409 | sg->sg_ispeed = tp->t_ispeed; | |
410 | sg->sg_ospeed = tp->t_ospeed; | |
411 | sg->sg_erase = tp->t_erase; | |
412 | sg->sg_kill = tp->t_kill; | |
413 | sg->sg_flags = tp->t_flags; | |
414 | break; | |
415 | } | |
416 | ||
417 | case FIONBIO: | |
418 | if (*(int *)data) | |
419 | tp->t_state |= TS_NBIO; | |
420 | else | |
421 | tp->t_state &= ~TS_NBIO; | |
422 | break; | |
423 | ||
424 | case FIOASYNC: | |
425 | if (*(int *)data) | |
426 | tp->t_state |= TS_ASYNC; | |
427 | else | |
428 | tp->t_state &= ~TS_ASYNC; | |
429 | break; | |
430 | ||
b968e450 SL |
431 | case TIOCGETC: |
432 | bcopy((caddr_t)&tp->t_intrc, data, sizeof (struct tchars)); | |
433 | break; | |
434 | ||
435 | case TIOCSETC: | |
436 | bcopy(data, (caddr_t)&tp->t_intrc, sizeof (struct tchars)); | |
437 | break; | |
438 | ||
88a7a62a SL |
439 | /* set/get local special characters */ |
440 | case TIOCSLTC: | |
441 | bcopy(data, (caddr_t)&tp->t_suspc, sizeof (struct ltchars)); | |
442 | break; | |
443 | ||
444 | case TIOCGLTC: | |
445 | bcopy((caddr_t)&tp->t_suspc, data, sizeof (struct ltchars)); | |
446 | break; | |
447 | ||
448 | /* | |
449 | * Modify local mode word. | |
450 | */ | |
451 | case TIOCLBIS: | |
452 | tp->t_flags |= *(int *)data << 16; | |
453 | break; | |
454 | ||
455 | case TIOCLBIC: | |
456 | tp->t_flags &= ~(*(int *)data << 16); | |
457 | break; | |
458 | ||
459 | case TIOCLSET: | |
460 | tp->t_flags &= 0xffff; | |
461 | tp->t_flags |= *(int *)data << 16; | |
462 | break; | |
463 | ||
464 | case TIOCLGET: | |
fb1db32c | 465 | *(int *)data = ((unsigned)tp->t_flags) >> 16; |
88a7a62a SL |
466 | break; |
467 | ||
4f3a716e | 468 | /* |
cd69487e | 469 | * Allow SPGRP only if tty is open for reading. |
f9eea644 JB |
470 | * Quick check: if we can find a process in the new pgrp, |
471 | * this user must own that process. | |
472 | * SHOULD VERIFY THAT PGRP IS IN USE AND IS THIS USER'S. | |
4f3a716e | 473 | */ |
245aeefa | 474 | case TIOCSPGRP: { |
4f3a716e MK |
475 | struct proc *p; |
476 | int pgrp = *(int *)data; | |
477 | ||
478 | if (u.u_uid && (flag & FREAD) == 0) | |
479 | return (EPERM); | |
f9eea644 JB |
480 | p = pfind(pgrp); |
481 | if (p && p->p_pgrp == pgrp && | |
482 | p->p_uid != u.u_uid && u.u_uid && !inferior(p)) | |
483 | return (EPERM); | |
4f3a716e | 484 | tp->t_pgrp = pgrp; |
88a7a62a | 485 | break; |
245aeefa | 486 | } |
88a7a62a SL |
487 | |
488 | case TIOCGPGRP: | |
489 | *(int *)data = tp->t_pgrp; | |
490 | break; | |
491 | ||
f9eea644 | 492 | case TIOCSWINSZ: |
245aeefa JB |
493 | if (bcmp((caddr_t)&tp->t_winsize, data, |
494 | sizeof (struct winsize))) { | |
f9eea644 JB |
495 | tp->t_winsize = *(struct winsize *)data; |
496 | gsignal(tp->t_pgrp, SIGWINCH); | |
497 | } | |
498 | break; | |
499 | ||
500 | case TIOCGWINSZ: | |
501 | *(struct winsize *)data = tp->t_winsize; | |
502 | break; | |
503 | ||
adf4bc89 MK |
504 | case TIOCCONS: |
505 | if (*(int *)data) { | |
506 | if (constty != NULL) | |
507 | return (EBUSY); | |
508 | #ifndef UCONSOLE | |
509 | if (!suser()) | |
510 | return (EPERM); | |
511 | #endif | |
512 | constty = tp; | |
513 | } else if (tp == constty) | |
1eebc1a7 | 514 | constty = NULL; |
adf4bc89 MK |
515 | break; |
516 | ||
89dc6dfb | 517 | default: |
fc6972ae | 518 | return (-1); |
89dc6dfb | 519 | } |
fc6972ae | 520 | return (0); |
89dc6dfb | 521 | } |
e1d74936 BJ |
522 | |
523 | ttnread(tp) | |
524 | struct tty *tp; | |
525 | { | |
526 | int nread = 0; | |
527 | ||
becb115c | 528 | if (tp->t_flags & PENDIN) |
e1d74936 BJ |
529 | ttypend(tp); |
530 | nread = tp->t_canq.c_cc; | |
531 | if (tp->t_flags & (RAW|CBREAK)) | |
532 | nread += tp->t_rawq.c_cc; | |
533 | return (nread); | |
534 | } | |
535 | ||
941944c9 | 536 | ttselect(dev, rw) |
e1d74936 | 537 | dev_t dev; |
941944c9 | 538 | int rw; |
e1d74936 BJ |
539 | { |
540 | register struct tty *tp = &cdevsw[major(dev)].d_ttys[minor(dev)]; | |
541 | int nread; | |
4f3a716e | 542 | int s = spltty(); |
e1d74936 | 543 | |
941944c9 | 544 | switch (rw) { |
e1d74936 BJ |
545 | |
546 | case FREAD: | |
547 | nread = ttnread(tp); | |
fb1db32c | 548 | if (nread > 0 || (tp->t_state & TS_CARR_ON) == 0) |
941944c9 | 549 | goto win; |
89b8a44c | 550 | if (tp->t_rsel && tp->t_rsel->p_wchan == (caddr_t)&selwait) |
941944c9 | 551 | tp->t_state |= TS_RCOLL; |
e1d74936 BJ |
552 | else |
553 | tp->t_rsel = u.u_procp; | |
941944c9 | 554 | break; |
e1d74936 | 555 | |
941944c9 BJ |
556 | case FWRITE: |
557 | if (tp->t_outq.c_cc <= TTLOWAT(tp)) | |
558 | goto win; | |
941944c9 BJ |
559 | if (tp->t_wsel && tp->t_wsel->p_wchan == (caddr_t)&selwait) |
560 | tp->t_state |= TS_WCOLL; | |
561 | else | |
562 | tp->t_wsel = u.u_procp; | |
563 | break; | |
e1d74936 | 564 | } |
941944c9 BJ |
565 | splx(s); |
566 | return (0); | |
567 | win: | |
568 | splx(s); | |
569 | return (1); | |
e1d74936 | 570 | } |
8bba2b8f | 571 | |
4147b3f6 | 572 | /* |
605d7712 | 573 | * Initial open of tty, or (re)entry to line discipline. |
becb115c | 574 | * Establish a process group for distribution of |
4147b3f6 | 575 | * quits and interrupts from the tty. |
4147b3f6 BJ |
576 | */ |
577 | ttyopen(dev, tp) | |
4b72e2f9 SL |
578 | dev_t dev; |
579 | register struct tty *tp; | |
4147b3f6 BJ |
580 | { |
581 | register struct proc *pp; | |
582 | ||
583 | pp = u.u_procp; | |
584 | tp->t_dev = dev; | |
4b72e2f9 | 585 | if (pp->p_pgrp == 0) { |
4147b3f6 BJ |
586 | u.u_ttyp = tp; |
587 | u.u_ttyd = dev; | |
588 | if (tp->t_pgrp == 0) | |
589 | tp->t_pgrp = pp->p_pid; | |
590 | pp->p_pgrp = tp->t_pgrp; | |
591 | } | |
592 | tp->t_state &= ~TS_WOPEN; | |
4f3a716e MK |
593 | if ((tp->t_state & TS_ISOPEN) == 0) { |
594 | tp->t_state |= TS_ISOPEN; | |
f9eea644 | 595 | bzero((caddr_t)&tp->t_winsize, sizeof(tp->t_winsize)); |
4f3a716e MK |
596 | if (tp->t_line != NTTYDISC) |
597 | ttywflush(tp); | |
598 | } | |
fc6972ae | 599 | return (0); |
4147b3f6 BJ |
600 | } |
601 | ||
605d7712 MK |
602 | /* |
603 | * "close" a line discipline | |
604 | */ | |
605 | ttylclose(tp) | |
606 | register struct tty *tp; | |
607 | { | |
608 | ||
609 | ttywflush(tp); | |
610 | tp->t_line = 0; | |
611 | } | |
612 | ||
4147b3f6 BJ |
613 | /* |
614 | * clean tp on last close | |
615 | */ | |
616 | ttyclose(tp) | |
4b72e2f9 | 617 | register struct tty *tp; |
4147b3f6 BJ |
618 | { |
619 | ||
adf4bc89 MK |
620 | if (constty == tp) |
621 | constty = NULL; | |
605d7712 | 622 | ttyflush(tp, FREAD|FWRITE); |
4147b3f6 | 623 | tp->t_pgrp = 0; |
4147b3f6 BJ |
624 | tp->t_state = 0; |
625 | } | |
626 | ||
605d7712 MK |
627 | /* |
628 | * Handle modem control transition on a tty. | |
629 | * Flag indicates new state of carrier. | |
630 | * Returns 0 if the line should be turned off, otherwise 1. | |
631 | */ | |
632 | ttymodem(tp, flag) | |
633 | register struct tty *tp; | |
634 | { | |
635 | ||
636 | if ((tp->t_state&TS_WOPEN) == 0 && (tp->t_flags & MDMBUF)) { | |
637 | /* | |
638 | * MDMBUF: do flow control according to carrier flag | |
639 | */ | |
640 | if (flag) { | |
641 | tp->t_state &= ~TS_TTSTOP; | |
642 | ttstart(tp); | |
643 | } else if ((tp->t_state&TS_TTSTOP) == 0) { | |
644 | tp->t_state |= TS_TTSTOP; | |
645 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
646 | } | |
647 | } else if (flag == 0) { | |
648 | /* | |
649 | * Lost carrier. | |
650 | */ | |
651 | tp->t_state &= ~TS_CARR_ON; | |
652 | if (tp->t_state & TS_ISOPEN) { | |
653 | if ((tp->t_flags & NOHANG) == 0) { | |
654 | gsignal(tp->t_pgrp, SIGHUP); | |
655 | gsignal(tp->t_pgrp, SIGCONT); | |
656 | ttyflush(tp, FREAD|FWRITE); | |
657 | return (0); | |
658 | } | |
659 | } | |
660 | } else { | |
661 | /* | |
662 | * Carrier now on. | |
663 | */ | |
664 | tp->t_state |= TS_CARR_ON; | |
665 | wakeup((caddr_t)&tp->t_rawq); | |
666 | } | |
667 | return (1); | |
668 | } | |
669 | ||
e3f2038d MK |
670 | /* |
671 | * Default modem control routine (for other line disciplines). | |
672 | * Return argument flag, to turn off device on carrier drop. | |
673 | */ | |
2f54b5e8 MK |
674 | nullmodem(tp, flag) |
675 | register struct tty *tp; | |
e3f2038d MK |
676 | int flag; |
677 | { | |
678 | ||
679 | if (flag) | |
680 | tp->t_state |= TS_CARR_ON; | |
681 | else | |
682 | tp->t_state &= ~TS_CARR_ON; | |
683 | return (flag); | |
684 | } | |
685 | ||
4147b3f6 BJ |
686 | /* |
687 | * reinput pending characters after state switch | |
4f3a716e | 688 | * call at spltty(). |
4147b3f6 BJ |
689 | */ |
690 | ttypend(tp) | |
4b72e2f9 | 691 | register struct tty *tp; |
4147b3f6 BJ |
692 | { |
693 | struct clist tq; | |
694 | register c; | |
695 | ||
becb115c SL |
696 | tp->t_flags &= ~PENDIN; |
697 | tp->t_state |= TS_TYPEN; | |
4147b3f6 BJ |
698 | tq = tp->t_rawq; |
699 | tp->t_rawq.c_cc = 0; | |
700 | tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0; | |
701 | while ((c = getc(&tq)) >= 0) | |
702 | ttyinput(c, tp); | |
becb115c | 703 | tp->t_state &= ~TS_TYPEN; |
4147b3f6 BJ |
704 | } |
705 | ||
706 | /* | |
becb115c SL |
707 | * Place a character on raw TTY input queue, |
708 | * putting in delimiters and waking up top | |
709 | * half as needed. Also echo if required. | |
710 | * The arguments are the character and the | |
711 | * appropriate tty structure. | |
4147b3f6 BJ |
712 | */ |
713 | ttyinput(c, tp) | |
4b72e2f9 SL |
714 | register c; |
715 | register struct tty *tp; | |
4147b3f6 | 716 | { |
becb115c | 717 | register int t_flags = tp->t_flags; |
4147b3f6 BJ |
718 | int i; |
719 | ||
becb115c SL |
720 | /* |
721 | * If input is pending take it first. | |
722 | */ | |
723 | if (t_flags&PENDIN) | |
4147b3f6 BJ |
724 | ttypend(tp); |
725 | tk_nin++; | |
726 | c &= 0377; | |
becb115c SL |
727 | |
728 | /* | |
729 | * In tandem mode, check high water mark. | |
730 | */ | |
4147b3f6 BJ |
731 | if (t_flags&TANDEM) |
732 | ttyblock(tp); | |
becb115c SL |
733 | |
734 | if (t_flags&RAW) { | |
735 | /* | |
736 | * Raw mode, just put character | |
737 | * in input q w/o interpretation. | |
738 | */ | |
739 | if (tp->t_rawq.c_cc > TTYHOG) | |
88a7a62a | 740 | ttyflush(tp, FREAD|FWRITE); |
becb115c SL |
741 | else { |
742 | if (putc(c, &tp->t_rawq) >= 0) | |
743 | ttwakeup(tp); | |
744 | ttyecho(c, tp); | |
4147b3f6 | 745 | } |
becb115c SL |
746 | goto endcase; |
747 | } | |
748 | ||
749 | /* | |
750 | * Ignore any high bit added during | |
751 | * previous ttyinput processing. | |
752 | */ | |
fb01874e | 753 | if ((tp->t_state&TS_TYPEN) == 0 && (t_flags&PASS8) == 0) |
becb115c SL |
754 | c &= 0177; |
755 | /* | |
756 | * Check for literal nexting very first | |
757 | */ | |
758 | if (tp->t_state&TS_LNCH) { | |
759 | c |= 0200; | |
760 | tp->t_state &= ~TS_LNCH; | |
761 | } | |
762 | ||
763 | /* | |
764 | * Scan for special characters. This code | |
765 | * is really just a big case statement with | |
766 | * non-constant cases. The bottom of the | |
767 | * case statement is labeled ``endcase'', so goto | |
768 | * it after a case match, or similar. | |
769 | */ | |
770 | if (tp->t_line == NTTYDISC) { | |
771 | if (c == tp->t_lnextc) { | |
93d2ecff | 772 | if (t_flags&ECHO) |
4147b3f6 | 773 | ttyout("^\b", tp); |
becb115c SL |
774 | tp->t_state |= TS_LNCH; |
775 | goto endcase; | |
776 | } | |
777 | if (c == tp->t_flushc) { | |
93d2ecff | 778 | if (t_flags&FLUSHO) |
becb115c | 779 | tp->t_flags &= ~FLUSHO; |
4147b3f6 | 780 | else { |
88a7a62a | 781 | ttyflush(tp, FWRITE); |
4147b3f6 | 782 | ttyecho(c, tp); |
becb115c | 783 | if (tp->t_rawq.c_cc + tp->t_canq.c_cc) |
4147b3f6 | 784 | ttyretype(tp); |
becb115c | 785 | tp->t_flags |= FLUSHO; |
4147b3f6 | 786 | } |
becb115c SL |
787 | goto startoutput; |
788 | } | |
789 | if (c == tp->t_suspc) { | |
93d2ecff | 790 | if ((t_flags&NOFLSH) == 0) |
88a7a62a | 791 | ttyflush(tp, FREAD); |
4147b3f6 | 792 | ttyecho(c, tp); |
becb115c SL |
793 | gsignal(tp->t_pgrp, SIGTSTP); |
794 | goto endcase; | |
795 | } | |
796 | } | |
797 | ||
798 | /* | |
799 | * Handle start/stop characters. | |
800 | */ | |
801 | if (c == tp->t_stopc) { | |
802 | if ((tp->t_state&TS_TTSTOP) == 0) { | |
803 | tp->t_state |= TS_TTSTOP; | |
804 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
805 | return; | |
806 | } | |
807 | if (c != tp->t_startc) | |
808 | return; | |
809 | goto endcase; | |
810 | } | |
811 | if (c == tp->t_startc) | |
812 | goto restartoutput; | |
813 | ||
814 | /* | |
815 | * Look for interrupt/quit chars. | |
816 | */ | |
817 | if (c == tp->t_intrc || c == tp->t_quitc) { | |
93d2ecff | 818 | if ((t_flags&NOFLSH) == 0) |
88a7a62a | 819 | ttyflush(tp, FREAD|FWRITE); |
becb115c SL |
820 | ttyecho(c, tp); |
821 | gsignal(tp->t_pgrp, c == tp->t_intrc ? SIGINT : SIGQUIT); | |
822 | goto endcase; | |
823 | } | |
824 | ||
58786a81 JB |
825 | if (tp->t_flags & LCASE && c <= 0177) { |
826 | if (tp->t_state&TS_BKSL) { | |
827 | ttyrub(unputc(&tp->t_rawq), tp); | |
828 | if (maptab[c]) | |
829 | c = maptab[c]; | |
830 | c |= 0200; | |
831 | tp->t_state &= ~(TS_BKSL|TS_QUOT); | |
832 | } else if (c >= 'A' && c <= 'Z') | |
833 | c += 'a' - 'A'; | |
834 | else if (c == '\\') | |
835 | tp->t_state |= TS_BKSL; | |
836 | } | |
837 | ||
becb115c SL |
838 | /* |
839 | * Cbreak mode, don't process line editing | |
840 | * characters; check high water mark for wakeup. | |
841 | */ | |
842 | if (t_flags&CBREAK) { | |
843 | if (tp->t_rawq.c_cc > TTYHOG) { | |
4147b3f6 BJ |
844 | if (tp->t_outq.c_cc < TTHIWAT(tp) && |
845 | tp->t_line == NTTYDISC) | |
7f2567b2 | 846 | (void) ttyoutput(CTRL('g'), tp); |
4147b3f6 BJ |
847 | } else if (putc(c, &tp->t_rawq) >= 0) { |
848 | ttwakeup(tp); | |
849 | ttyecho(c, tp); | |
850 | } | |
becb115c SL |
851 | goto endcase; |
852 | } | |
853 | ||
854 | /* | |
855 | * From here on down cooked mode character | |
856 | * processing takes place. | |
857 | */ | |
858 | if ((tp->t_state&TS_QUOT) && | |
859 | (c == tp->t_erase || c == tp->t_kill)) { | |
860 | ttyrub(unputc(&tp->t_rawq), tp); | |
861 | c |= 0200; | |
862 | } | |
863 | if (c == tp->t_erase) { | |
864 | if (tp->t_rawq.c_cc) | |
865 | ttyrub(unputc(&tp->t_rawq), tp); | |
866 | goto endcase; | |
867 | } | |
868 | if (c == tp->t_kill) { | |
93d2ecff | 869 | if (t_flags&CRTKIL && |
becb115c SL |
870 | tp->t_rawq.c_cc == tp->t_rocount) { |
871 | while (tp->t_rawq.c_cc) | |
872 | ttyrub(unputc(&tp->t_rawq), tp); | |
873 | } else { | |
874 | ttyecho(c, tp); | |
875 | ttyecho('\n', tp); | |
876 | while (getc(&tp->t_rawq) > 0) | |
877 | ; | |
878 | tp->t_rocount = 0; | |
879 | } | |
880 | tp->t_state &= ~TS_LOCAL; | |
881 | goto endcase; | |
882 | } | |
883 | ||
884 | /* | |
885 | * New line discipline, | |
886 | * check word erase/reprint line. | |
887 | */ | |
888 | if (tp->t_line == NTTYDISC) { | |
889 | if (c == tp->t_werasc) { | |
890 | if (tp->t_rawq.c_cc == 0) | |
891 | goto endcase; | |
892 | do { | |
893 | c = unputc(&tp->t_rawq); | |
894 | if (c != ' ' && c != '\t') | |
895 | goto erasenb; | |
896 | ttyrub(c, tp); | |
897 | } while (tp->t_rawq.c_cc); | |
898 | goto endcase; | |
899 | erasenb: | |
900 | do { | |
901 | ttyrub(c, tp); | |
902 | if (tp->t_rawq.c_cc == 0) | |
903 | goto endcase; | |
904 | c = unputc(&tp->t_rawq); | |
905 | } while (c != ' ' && c != '\t'); | |
906 | (void) putc(c, &tp->t_rawq); | |
907 | goto endcase; | |
908 | } | |
909 | if (c == tp->t_rprntc) { | |
910 | ttyretype(tp); | |
911 | goto endcase; | |
912 | } | |
913 | } | |
914 | ||
915 | /* | |
916 | * Check for input buffer overflow | |
917 | */ | |
7c9f96c0 SL |
918 | if (tp->t_rawq.c_cc+tp->t_canq.c_cc >= TTYHOG) { |
919 | if (tp->t_line == NTTYDISC) | |
7f2567b2 | 920 | (void) ttyoutput(CTRL('g'), tp); |
becb115c | 921 | goto endcase; |
7c9f96c0 | 922 | } |
becb115c SL |
923 | |
924 | /* | |
925 | * Put data char in q for user and | |
926 | * wakeup on seeing a line delimiter. | |
927 | */ | |
928 | if (putc(c, &tp->t_rawq) >= 0) { | |
becb115c SL |
929 | if (ttbreakc(c, tp)) { |
930 | tp->t_rocount = 0; | |
931 | catq(&tp->t_rawq, &tp->t_canq); | |
4147b3f6 | 932 | ttwakeup(tp); |
becb115c SL |
933 | } else if (tp->t_rocount++ == 0) |
934 | tp->t_rocol = tp->t_col; | |
935 | tp->t_state &= ~TS_QUOT; | |
936 | if (c == '\\') | |
937 | tp->t_state |= TS_QUOT; | |
938 | if (tp->t_state&TS_ERASE) { | |
939 | tp->t_state &= ~TS_ERASE; | |
940 | (void) ttyoutput('/', tp); | |
941 | } | |
942 | i = tp->t_col; | |
4147b3f6 | 943 | ttyecho(c, tp); |
93d2ecff | 944 | if (c == tp->t_eofc && t_flags&ECHO) { |
becb115c SL |
945 | i = MIN(2, tp->t_col - i); |
946 | while (i > 0) { | |
947 | (void) ttyoutput('\b', tp); | |
948 | i--; | |
949 | } | |
950 | } | |
4147b3f6 | 951 | } |
becb115c SL |
952 | endcase: |
953 | /* | |
954 | * If DEC-style start/stop is enabled don't restart | |
955 | * output until seeing the start character. | |
956 | */ | |
93d2ecff | 957 | if (t_flags&DECCTQ && tp->t_state&TS_TTSTOP && |
becb115c | 958 | tp->t_startc != tp->t_stopc) |
4147b3f6 | 959 | return; |
becb115c | 960 | restartoutput: |
4147b3f6 | 961 | tp->t_state &= ~TS_TTSTOP; |
becb115c | 962 | tp->t_flags &= ~FLUSHO; |
becb115c | 963 | startoutput: |
4147b3f6 BJ |
964 | ttstart(tp); |
965 | } | |
966 | ||
967 | /* | |
becb115c | 968 | * Put character on TTY output queue, adding delays, |
4147b3f6 | 969 | * expanding tabs, and handling the CR/NL bit. |
becb115c SL |
970 | * This is called both from the top half for output, |
971 | * and from interrupt level for echoing. | |
4147b3f6 BJ |
972 | * The arguments are the character and the tty structure. |
973 | * Returns < 0 if putc succeeds, otherwise returns char to resend | |
974 | * Must be recursive. | |
975 | */ | |
976 | ttyoutput(c, tp) | |
977 | register c; | |
978 | register struct tty *tp; | |
979 | { | |
980 | register char *colp; | |
981 | register ctype; | |
982 | ||
becb115c SL |
983 | if (tp->t_flags & (RAW|LITOUT)) { |
984 | if (tp->t_flags&FLUSHO) | |
4147b3f6 BJ |
985 | return (-1); |
986 | if (putc(c, &tp->t_outq)) | |
4b72e2f9 | 987 | return (c); |
4147b3f6 BJ |
988 | tk_nout++; |
989 | return (-1); | |
990 | } | |
becb115c | 991 | |
4147b3f6 | 992 | /* |
becb115c SL |
993 | * Ignore EOT in normal mode to avoid |
994 | * hanging up certain terminals. | |
4147b3f6 BJ |
995 | */ |
996 | c &= 0177; | |
becb115c | 997 | if (c == CEOT && (tp->t_flags&CBREAK) == 0) |
4147b3f6 BJ |
998 | return (-1); |
999 | /* | |
1000 | * Turn tabs to spaces as required | |
1001 | */ | |
becb115c | 1002 | if (c == '\t' && (tp->t_flags&TBDELAY) == XTABS) { |
4147b3f6 BJ |
1003 | register int s; |
1004 | ||
1005 | c = 8 - (tp->t_col&7); | |
becb115c | 1006 | if ((tp->t_flags&FLUSHO) == 0) { |
4f3a716e | 1007 | s = spltty(); /* don't interrupt tabs */ |
4147b3f6 BJ |
1008 | c -= b_to_q(" ", c, &tp->t_outq); |
1009 | tk_nout += c; | |
1010 | splx(s); | |
1011 | } | |
1012 | tp->t_col += c; | |
1013 | return (c ? -1 : '\t'); | |
1014 | } | |
1015 | tk_nout++; | |
1016 | /* | |
1017 | * for upper-case-only terminals, | |
1018 | * generate escapes. | |
1019 | */ | |
1020 | if (tp->t_flags&LCASE) { | |
1021 | colp = "({)}!|^~'`"; | |
4b72e2f9 SL |
1022 | while (*colp++) |
1023 | if (c == *colp++) { | |
4147b3f6 BJ |
1024 | if (ttyoutput('\\', tp) >= 0) |
1025 | return (c); | |
1026 | c = colp[-2]; | |
1027 | break; | |
1028 | } | |
becb115c | 1029 | if ('A' <= c && c <= 'Z') { |
4147b3f6 BJ |
1030 | if (ttyoutput('\\', tp) >= 0) |
1031 | return (c); | |
becb115c | 1032 | } else if ('a' <= c && c <= 'z') |
4147b3f6 BJ |
1033 | c += 'A' - 'a'; |
1034 | } | |
becb115c | 1035 | |
4147b3f6 BJ |
1036 | /* |
1037 | * turn <nl> to <cr><lf> if desired. | |
1038 | */ | |
becb115c | 1039 | if (c == '\n' && tp->t_flags&CRMOD) |
4147b3f6 BJ |
1040 | if (ttyoutput('\r', tp) >= 0) |
1041 | return (c); | |
becb115c | 1042 | if (c == '~' && tp->t_flags&TILDE) |
4147b3f6 | 1043 | c = '`'; |
becb115c | 1044 | if ((tp->t_flags&FLUSHO) == 0 && putc(c, &tp->t_outq)) |
4147b3f6 BJ |
1045 | return (c); |
1046 | /* | |
1047 | * Calculate delays. | |
1048 | * The numbers here represent clock ticks | |
1049 | * and are not necessarily optimal for all terminals. | |
1050 | * The delays are indicated by characters above 0200. | |
1051 | * In raw mode there are no delays and the | |
1052 | * transmission path is 8 bits wide. | |
becb115c SL |
1053 | * |
1054 | * SHOULD JUST ALLOW USER TO SPECIFY DELAYS | |
4147b3f6 BJ |
1055 | */ |
1056 | colp = &tp->t_col; | |
1057 | ctype = partab[c]; | |
1058 | c = 0; | |
1059 | switch (ctype&077) { | |
1060 | ||
1061 | case ORDINARY: | |
1062 | (*colp)++; | |
1063 | ||
1064 | case CONTROL: | |
1065 | break; | |
1066 | ||
1067 | case BACKSPACE: | |
1068 | if (*colp) | |
1069 | (*colp)--; | |
1070 | break; | |
1071 | ||
3686c829 SL |
1072 | /* |
1073 | * This macro is close enough to the correct thing; | |
1074 | * it should be replaced by real user settable delays | |
1075 | * in any event... | |
1076 | */ | |
1077 | #define mstohz(ms) (((ms) * hz) >> 10) | |
4147b3f6 BJ |
1078 | case NEWLINE: |
1079 | ctype = (tp->t_flags >> 8) & 03; | |
4b72e2f9 | 1080 | if (ctype == 1) { /* tty 37 */ |
8011f5df MK |
1081 | if (*colp > 0) { |
1082 | c = (((unsigned)*colp) >> 4) + 3; | |
1083 | if ((unsigned)c > 6) | |
1084 | c = 6; | |
1085 | } | |
becb115c | 1086 | } else if (ctype == 2) /* vt05 */ |
3686c829 | 1087 | c = mstohz(100); |
4147b3f6 BJ |
1088 | *colp = 0; |
1089 | break; | |
1090 | ||
1091 | case TAB: | |
1092 | ctype = (tp->t_flags >> 10) & 03; | |
4b72e2f9 | 1093 | if (ctype == 1) { /* tty 37 */ |
4147b3f6 | 1094 | c = 1 - (*colp | ~07); |
4b72e2f9 | 1095 | if (c < 5) |
4147b3f6 BJ |
1096 | c = 0; |
1097 | } | |
1098 | *colp |= 07; | |
1099 | (*colp)++; | |
1100 | break; | |
1101 | ||
1102 | case VTAB: | |
becb115c | 1103 | if (tp->t_flags&VTDELAY) /* tty 37 */ |
4147b3f6 BJ |
1104 | c = 0177; |
1105 | break; | |
1106 | ||
1107 | case RETURN: | |
1108 | ctype = (tp->t_flags >> 12) & 03; | |
becb115c | 1109 | if (ctype == 1) /* tn 300 */ |
3686c829 | 1110 | c = mstohz(83); |
becb115c | 1111 | else if (ctype == 2) /* ti 700 */ |
3686c829 | 1112 | c = mstohz(166); |
becb115c | 1113 | else if (ctype == 3) { /* concept 100 */ |
4147b3f6 | 1114 | int i; |
becb115c | 1115 | |
4147b3f6 | 1116 | if ((i = *colp) >= 0) |
becb115c | 1117 | for (; i < 9; i++) |
4147b3f6 BJ |
1118 | (void) putc(0177, &tp->t_outq); |
1119 | } | |
1120 | *colp = 0; | |
1121 | } | |
becb115c | 1122 | if (c && (tp->t_flags&FLUSHO) == 0) |
4147b3f6 BJ |
1123 | (void) putc(c|0200, &tp->t_outq); |
1124 | return (-1); | |
1125 | } | |
3686c829 | 1126 | #undef mstohz |
4147b3f6 BJ |
1127 | |
1128 | /* | |
1129 | * Called from device's read routine after it has | |
1130 | * calculated the tty-structure given as argument. | |
1131 | */ | |
d6d7360b | 1132 | ttread(tp, uio) |
4b72e2f9 | 1133 | register struct tty *tp; |
d6d7360b | 1134 | struct uio *uio; |
4147b3f6 BJ |
1135 | { |
1136 | register struct clist *qp; | |
becb115c | 1137 | register c, t_flags; |
875a1e2c | 1138 | int s, first, error = 0; |
4147b3f6 | 1139 | |
4147b3f6 | 1140 | loop: |
becb115c SL |
1141 | /* |
1142 | * Take any pending input first. | |
1143 | */ | |
4f3a716e | 1144 | s = spltty(); |
becb115c | 1145 | if (tp->t_flags&PENDIN) |
4147b3f6 | 1146 | ttypend(tp); |
875a1e2c | 1147 | splx(s); |
becb115c | 1148 | |
58786a81 JB |
1149 | if ((tp->t_state&TS_CARR_ON)==0) |
1150 | return (EIO); | |
1151 | ||
becb115c SL |
1152 | /* |
1153 | * Hang process if it's in the background. | |
1154 | */ | |
58786a81 | 1155 | if (tp == u.u_ttyp && u.u_procp->p_pgrp != tp->t_pgrp) { |
52c041cd MK |
1156 | if ((u.u_procp->p_sigignore & sigmask(SIGTTIN)) || |
1157 | (u.u_procp->p_sigmask & sigmask(SIGTTIN)) || | |
4147b3f6 | 1158 | u.u_procp->p_flag&SVFORK) |
840510a3 | 1159 | return (EIO); |
4147b3f6 BJ |
1160 | gsignal(u.u_procp->p_pgrp, SIGTTIN); |
1161 | sleep((caddr_t)&lbolt, TTIPRI); | |
58786a81 | 1162 | goto loop; |
4147b3f6 | 1163 | } |
becb115c SL |
1164 | t_flags = tp->t_flags; |
1165 | ||
1166 | /* | |
1167 | * In raw mode take characters directly from the | |
1168 | * raw queue w/o processing. Interlock against | |
1169 | * device interrupts when interrogating rawq. | |
1170 | */ | |
1171 | if (t_flags&RAW) { | |
4f3a716e | 1172 | s = spltty(); |
4147b3f6 | 1173 | if (tp->t_rawq.c_cc <= 0) { |
becb115c | 1174 | if ((tp->t_state&TS_CARR_ON) == 0 || |
4147b3f6 | 1175 | (tp->t_state&TS_NBIO)) { |
875a1e2c | 1176 | splx(s); |
e0d1a4cb | 1177 | return (EWOULDBLOCK); |
4147b3f6 BJ |
1178 | } |
1179 | sleep((caddr_t)&tp->t_rawq, TTIPRI); | |
875a1e2c | 1180 | splx(s); |
4147b3f6 BJ |
1181 | goto loop; |
1182 | } | |
875a1e2c | 1183 | splx(s); |
9ec65acb KM |
1184 | while (!error && tp->t_rawq.c_cc && uio->uio_resid) |
1185 | error = ureadc(getc(&tp->t_rawq), uio); | |
875a1e2c | 1186 | goto checktandem; |
becb115c SL |
1187 | } |
1188 | ||
1189 | /* | |
1190 | * In cbreak mode use the rawq, otherwise | |
1191 | * take characters from the canonicalized q. | |
1192 | */ | |
1193 | qp = t_flags&CBREAK ? &tp->t_rawq : &tp->t_canq; | |
1194 | ||
1195 | /* | |
1196 | * No input, sleep on rawq awaiting hardware | |
1197 | * receipt and notification. | |
1198 | */ | |
4f3a716e | 1199 | s = spltty(); |
becb115c SL |
1200 | if (qp->c_cc <= 0) { |
1201 | if ((tp->t_state&TS_CARR_ON) == 0 || | |
1202 | (tp->t_state&TS_NBIO)) { | |
875a1e2c | 1203 | splx(s); |
becb115c | 1204 | return (EWOULDBLOCK); |
4147b3f6 | 1205 | } |
becb115c | 1206 | sleep((caddr_t)&tp->t_rawq, TTIPRI); |
875a1e2c | 1207 | splx(s); |
becb115c SL |
1208 | goto loop; |
1209 | } | |
875a1e2c | 1210 | splx(s); |
becb115c SL |
1211 | |
1212 | /* | |
1213 | * Input present, perform input mapping | |
1214 | * and processing (we're not in raw mode). | |
1215 | */ | |
1216 | first = 1; | |
1217 | while ((c = getc(qp)) >= 0) { | |
1218 | if (t_flags&CRMOD && c == '\r') | |
1219 | c = '\n'; | |
becb115c SL |
1220 | /* |
1221 | * Check for delayed suspend character. | |
1222 | */ | |
1223 | if (tp->t_line == NTTYDISC && c == tp->t_dsuspc) { | |
1224 | gsignal(tp->t_pgrp, SIGTSTP); | |
1225 | if (first) { | |
1226 | sleep((caddr_t)&lbolt, TTIPRI); | |
1227 | goto loop; | |
1228 | } | |
1229 | break; | |
4147b3f6 | 1230 | } |
becb115c SL |
1231 | /* |
1232 | * Interpret EOF only in cooked mode. | |
1233 | */ | |
1234 | if (c == tp->t_eofc && (t_flags&CBREAK) == 0) | |
1235 | break; | |
1236 | /* | |
1237 | * Give user character. | |
1238 | */ | |
fb01874e | 1239 | error = ureadc(t_flags&PASS8 ? c : c & 0177, uio); |
becb115c SL |
1240 | if (error) |
1241 | break; | |
9ec65acb | 1242 | if (uio->uio_resid == 0) |
becb115c SL |
1243 | break; |
1244 | /* | |
1245 | * In cooked mode check for a "break character" | |
1246 | * marking the end of a "line of input". | |
1247 | */ | |
1248 | if ((t_flags&CBREAK) == 0 && ttbreakc(c, tp)) | |
1249 | break; | |
1250 | first = 0; | |
4147b3f6 | 1251 | } |
becb115c | 1252 | |
875a1e2c | 1253 | checktandem: |
becb115c SL |
1254 | /* |
1255 | * Look to unblock output now that (presumably) | |
1256 | * the input queue has gone down. | |
1257 | */ | |
875a1e2c | 1258 | if (tp->t_state&TS_TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) |
becb115c | 1259 | if (putc(tp->t_startc, &tp->t_outq) == 0) { |
4147b3f6 BJ |
1260 | tp->t_state &= ~TS_TBLOCK; |
1261 | ttstart(tp); | |
1262 | } | |
840510a3 | 1263 | return (error); |
4147b3f6 BJ |
1264 | } |
1265 | ||
605d7712 MK |
1266 | /* |
1267 | * Check the output queue on tp for space for a kernel message | |
1268 | * (from uprintf/tprintf). Allow some space over the normal | |
1269 | * hiwater mark so we don't lose messages due to normal flow | |
1270 | * control, but don't let the tty run amok. | |
ca9b16e5 MK |
1271 | * Sleeps here are not interruptible, but we return prematurely |
1272 | * if new signals come in. | |
605d7712 MK |
1273 | */ |
1274 | ttycheckoutq(tp, wait) | |
1275 | register struct tty *tp; | |
1276 | int wait; | |
1277 | { | |
ca9b16e5 | 1278 | int hiwat, s, oldsig; |
605d7712 MK |
1279 | |
1280 | hiwat = TTHIWAT(tp); | |
1281 | s = spltty(); | |
ca9b16e5 | 1282 | oldsig = u.u_procp->p_sig; |
605d7712 | 1283 | if (tp->t_outq.c_cc > hiwat + 200) |
fb1db32c MK |
1284 | while (tp->t_outq.c_cc > hiwat) { |
1285 | ttstart(tp); | |
ca9b16e5 | 1286 | if (wait == 0 || u.u_procp->p_sig != oldsig) { |
fb1db32c MK |
1287 | splx(s); |
1288 | return (0); | |
1289 | } | |
ca9b16e5 | 1290 | timeout(wakeup, (caddr_t)&tp->t_outq, hz); |
fb1db32c | 1291 | tp->t_state |= TS_ASLEEP; |
ca9b16e5 | 1292 | sleep((caddr_t)&tp->t_outq, PZERO - 1); |
605d7712 | 1293 | } |
605d7712 MK |
1294 | splx(s); |
1295 | return (1); | |
1296 | } | |
1297 | ||
4147b3f6 BJ |
1298 | /* |
1299 | * Called from the device's write routine after it has | |
1300 | * calculated the tty-structure given as argument. | |
1301 | */ | |
913ea2d1 | 1302 | ttwrite(tp, uio) |
4b72e2f9 | 1303 | register struct tty *tp; |
becb115c | 1304 | register struct uio *uio; |
4147b3f6 | 1305 | { |
4147b3f6 | 1306 | register char *cp; |
becb115c SL |
1307 | register int cc, ce, c; |
1308 | int i, hiwat, cnt, error, s; | |
4147b3f6 | 1309 | char obuf[OBUFSIZ]; |
4147b3f6 | 1310 | |
becb115c SL |
1311 | hiwat = TTHIWAT(tp); |
1312 | cnt = uio->uio_resid; | |
1313 | error = 0; | |
4147b3f6 | 1314 | loop: |
93d2ecff JB |
1315 | if ((tp->t_state&TS_CARR_ON) == 0) |
1316 | return (EIO); | |
becb115c SL |
1317 | /* |
1318 | * Hang the process if it's in the background. | |
1319 | */ | |
93d2ecff | 1320 | if (u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && |
becb115c | 1321 | (tp->t_flags&TOSTOP) && (u.u_procp->p_flag&SVFORK)==0 && |
52c041cd MK |
1322 | !(u.u_procp->p_sigignore & sigmask(SIGTTOU)) && |
1323 | !(u.u_procp->p_sigmask & sigmask(SIGTTOU))) { | |
4147b3f6 BJ |
1324 | gsignal(u.u_procp->p_pgrp, SIGTTOU); |
1325 | sleep((caddr_t)&lbolt, TTIPRI); | |
93d2ecff | 1326 | goto loop; |
4147b3f6 | 1327 | } |
becb115c SL |
1328 | |
1329 | /* | |
1330 | * Process the user's data in at most OBUFSIZ | |
1331 | * chunks. Perform lower case simulation and | |
1332 | * similar hacks. Keep track of high water | |
1333 | * mark, sleep on overflow awaiting device aid | |
1334 | * in acquiring new space. | |
1335 | */ | |
913ea2d1 | 1336 | while (uio->uio_resid > 0) { |
b482b2c8 MK |
1337 | if (tp->t_outq.c_cc > hiwat) { |
1338 | cc = 0; | |
1339 | goto ovhiwat; | |
1340 | } | |
becb115c SL |
1341 | /* |
1342 | * Grab a hunk of data from the user. | |
1343 | */ | |
913ea2d1 BJ |
1344 | cc = uio->uio_iov->iov_len; |
1345 | if (cc == 0) { | |
1346 | uio->uio_iovcnt--; | |
1347 | uio->uio_iov++; | |
93d2ecff | 1348 | if (uio->uio_iovcnt <= 0) |
913ea2d1 BJ |
1349 | panic("ttwrite"); |
1350 | continue; | |
1351 | } | |
1352 | if (cc > OBUFSIZ) | |
1353 | cc = OBUFSIZ; | |
4147b3f6 | 1354 | cp = obuf; |
88a7a62a | 1355 | error = uiomove(cp, cc, UIO_WRITE, uio); |
840510a3 | 1356 | if (error) |
4147b3f6 | 1357 | break; |
becb115c | 1358 | if (tp->t_flags&FLUSHO) |
4147b3f6 | 1359 | continue; |
becb115c SL |
1360 | /* |
1361 | * If we're mapping lower case or kludging tildes, | |
1362 | * then we've got to look at each character, so | |
1363 | * just feed the stuff to ttyoutput... | |
1364 | */ | |
1365 | if (tp->t_flags & (LCASE|TILDE)) { | |
1366 | while (cc > 0) { | |
4147b3f6 BJ |
1367 | c = *cp++; |
1368 | tp->t_rocount = 0; | |
4b72e2f9 | 1369 | while ((c = ttyoutput(c, tp)) >= 0) { |
4147b3f6 BJ |
1370 | /* out of clists, wait a bit */ |
1371 | ttstart(tp); | |
1372 | sleep((caddr_t)&lbolt, TTOPRI); | |
1373 | tp->t_rocount = 0; | |
93d2ecff JB |
1374 | if (cc != 0) { |
1375 | uio->uio_iov->iov_base -= cc; | |
1376 | uio->uio_iov->iov_len += cc; | |
1377 | uio->uio_resid += cc; | |
1378 | uio->uio_offset -= cc; | |
1379 | } | |
1380 | goto loop; | |
4147b3f6 BJ |
1381 | } |
1382 | --cc; | |
1383 | if (tp->t_outq.c_cc > hiwat) | |
1384 | goto ovhiwat; | |
1385 | } | |
1386 | continue; | |
1387 | } | |
becb115c SL |
1388 | /* |
1389 | * If nothing fancy need be done, grab those characters we | |
1390 | * can handle without any of ttyoutput's processing and | |
1391 | * just transfer them to the output q. For those chars | |
1392 | * which require special processing (as indicated by the | |
1393 | * bits in partab), call ttyoutput. After processing | |
1394 | * a hunk of data, look for FLUSHO so ^O's will take effect | |
1395 | * immediately. | |
1396 | */ | |
1397 | while (cc > 0) { | |
1398 | if (tp->t_flags & (RAW|LITOUT)) | |
4147b3f6 BJ |
1399 | ce = cc; |
1400 | else { | |
88a7a62a SL |
1401 | ce = cc - scanc((unsigned)cc, (caddr_t)cp, |
1402 | (caddr_t)partab, 077); | |
becb115c SL |
1403 | /* |
1404 | * If ce is zero, then we're processing | |
1405 | * a special character through ttyoutput. | |
1406 | */ | |
1407 | if (ce == 0) { | |
4147b3f6 BJ |
1408 | tp->t_rocount = 0; |
1409 | if (ttyoutput(*cp, tp) >= 0) { | |
93d2ecff JB |
1410 | /* no c-lists, wait a bit */ |
1411 | ttstart(tp); | |
1412 | sleep((caddr_t)&lbolt, TTOPRI); | |
1413 | if (cc != 0) { | |
1414 | uio->uio_iov->iov_base -= cc; | |
1415 | uio->uio_iov->iov_len += cc; | |
1416 | uio->uio_resid += cc; | |
1417 | uio->uio_offset -= cc; | |
1418 | } | |
1419 | goto loop; | |
4147b3f6 | 1420 | } |
becb115c SL |
1421 | cp++, cc--; |
1422 | if (tp->t_flags&FLUSHO || | |
1423 | tp->t_outq.c_cc > hiwat) | |
4147b3f6 | 1424 | goto ovhiwat; |
becb115c | 1425 | continue; |
4147b3f6 BJ |
1426 | } |
1427 | } | |
becb115c SL |
1428 | /* |
1429 | * A bunch of normal characters have been found, | |
1430 | * transfer them en masse to the output queue and | |
1431 | * continue processing at the top of the loop. | |
1432 | * If there are any further characters in this | |
1433 | * <= OBUFSIZ chunk, the first should be a character | |
1434 | * requiring special handling by ttyoutput. | |
1435 | */ | |
4147b3f6 | 1436 | tp->t_rocount = 0; |
becb115c SL |
1437 | i = b_to_q(cp, ce, &tp->t_outq); |
1438 | ce -= i; | |
1439 | tp->t_col += ce; | |
1440 | cp += ce, cc -= ce, tk_nout += ce; | |
1441 | if (i > 0) { | |
1442 | /* out of c-lists, wait a bit */ | |
4147b3f6 BJ |
1443 | ttstart(tp); |
1444 | sleep((caddr_t)&lbolt, TTOPRI); | |
93d2ecff JB |
1445 | uio->uio_iov->iov_base -= cc; |
1446 | uio->uio_iov->iov_len += cc; | |
1447 | uio->uio_resid += cc; | |
1448 | uio->uio_offset -= cc; | |
1449 | goto loop; | |
4147b3f6 | 1450 | } |
becb115c | 1451 | if (tp->t_flags&FLUSHO || tp->t_outq.c_cc > hiwat) |
4147b3f6 BJ |
1452 | goto ovhiwat; |
1453 | } | |
1454 | } | |
1455 | ttstart(tp); | |
840510a3 | 1456 | return (error); |
4147b3f6 BJ |
1457 | |
1458 | ovhiwat: | |
becb115c SL |
1459 | if (cc != 0) { |
1460 | uio->uio_iov->iov_base -= cc; | |
1461 | uio->uio_iov->iov_len += cc; | |
1462 | uio->uio_resid += cc; | |
1463 | uio->uio_offset -= cc; | |
1464 | } | |
b482b2c8 MK |
1465 | ttstart(tp); |
1466 | s = spltty(); | |
becb115c | 1467 | /* |
b482b2c8 MK |
1468 | * This can only occur if FLUSHO is set in t_flags, |
1469 | * or if ttstart/oproc is synchronous (or very fast). | |
becb115c | 1470 | */ |
4147b3f6 | 1471 | if (tp->t_outq.c_cc <= hiwat) { |
becb115c | 1472 | splx(s); |
4147b3f6 BJ |
1473 | goto loop; |
1474 | } | |
becb115c | 1475 | if (tp->t_state&TS_NBIO) { |
4f3a716e | 1476 | splx(s); |
913ea2d1 | 1477 | if (uio->uio_resid == cnt) |
840510a3 BJ |
1478 | return (EWOULDBLOCK); |
1479 | return (0); | |
4147b3f6 BJ |
1480 | } |
1481 | tp->t_state |= TS_ASLEEP; | |
1482 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
becb115c | 1483 | splx(s); |
4147b3f6 BJ |
1484 | goto loop; |
1485 | } | |
1486 | ||
1487 | /* | |
1488 | * Rubout one character from the rawq of tp | |
1489 | * as cleanly as possible. | |
1490 | */ | |
1491 | ttyrub(c, tp) | |
4b72e2f9 SL |
1492 | register c; |
1493 | register struct tty *tp; | |
4147b3f6 BJ |
1494 | { |
1495 | register char *cp; | |
1496 | register int savecol; | |
1497 | int s; | |
1498 | char *nextc(); | |
1499 | ||
becb115c | 1500 | if ((tp->t_flags&ECHO) == 0) |
4147b3f6 | 1501 | return; |
becb115c | 1502 | tp->t_flags &= ~FLUSHO; |
4147b3f6 | 1503 | c &= 0377; |
becb115c | 1504 | if (tp->t_flags&CRTBS) { |
4147b3f6 BJ |
1505 | if (tp->t_rocount == 0) { |
1506 | /* | |
1507 | * Screwed by ttwrite; retype | |
1508 | */ | |
1509 | ttyretype(tp); | |
1510 | return; | |
1511 | } | |
becb115c | 1512 | if (c == ('\t'|0200) || c == ('\n'|0200)) |
4147b3f6 | 1513 | ttyrubo(tp, 2); |
becb115c | 1514 | else switch (partab[c&=0177]&0177) { |
4147b3f6 BJ |
1515 | |
1516 | case ORDINARY: | |
1517 | if (tp->t_flags&LCASE && c >= 'A' && c <= 'Z') | |
1518 | ttyrubo(tp, 2); | |
1519 | else | |
1520 | ttyrubo(tp, 1); | |
1521 | break; | |
1522 | ||
1523 | case VTAB: | |
1524 | case BACKSPACE: | |
1525 | case CONTROL: | |
1526 | case RETURN: | |
becb115c | 1527 | if (tp->t_flags&CTLECH) |
4147b3f6 BJ |
1528 | ttyrubo(tp, 2); |
1529 | break; | |
1530 | ||
1531 | case TAB: | |
1532 | if (tp->t_rocount < tp->t_rawq.c_cc) { | |
1533 | ttyretype(tp); | |
1534 | return; | |
1535 | } | |
4f3a716e | 1536 | s = spltty(); |
4147b3f6 | 1537 | savecol = tp->t_col; |
becb115c SL |
1538 | tp->t_state |= TS_CNTTB; |
1539 | tp->t_flags |= FLUSHO; | |
4147b3f6 | 1540 | tp->t_col = tp->t_rocol; |
becb115c SL |
1541 | cp = tp->t_rawq.c_cf; |
1542 | for (; cp; cp = nextc(&tp->t_rawq, cp)) | |
4147b3f6 | 1543 | ttyecho(*cp, tp); |
becb115c SL |
1544 | tp->t_flags &= ~FLUSHO; |
1545 | tp->t_state &= ~TS_CNTTB; | |
4147b3f6 BJ |
1546 | splx(s); |
1547 | /* | |
1548 | * savecol will now be length of the tab | |
1549 | */ | |
1550 | savecol -= tp->t_col; | |
1551 | tp->t_col += savecol; | |
1552 | if (savecol > 8) | |
1553 | savecol = 8; /* overflow screw */ | |
1554 | while (--savecol >= 0) | |
1555 | (void) ttyoutput('\b', tp); | |
1556 | break; | |
1557 | ||
1558 | default: | |
1559 | panic("ttyrub"); | |
1560 | } | |
becb115c SL |
1561 | } else if (tp->t_flags&PRTERA) { |
1562 | if ((tp->t_state&TS_ERASE) == 0) { | |
4147b3f6 | 1563 | (void) ttyoutput('\\', tp); |
becb115c | 1564 | tp->t_state |= TS_ERASE; |
4147b3f6 BJ |
1565 | } |
1566 | ttyecho(c, tp); | |
1567 | } else | |
1568 | ttyecho(tp->t_erase, tp); | |
1569 | tp->t_rocount--; | |
1570 | } | |
1571 | ||
1572 | /* | |
1573 | * Crt back over cnt chars perhaps | |
1574 | * erasing them. | |
1575 | */ | |
1576 | ttyrubo(tp, cnt) | |
4b72e2f9 SL |
1577 | register struct tty *tp; |
1578 | int cnt; | |
4147b3f6 | 1579 | { |
becb115c | 1580 | register char *rubostring = tp->t_flags&CRTERA ? "\b \b" : "\b"; |
4147b3f6 BJ |
1581 | |
1582 | while (--cnt >= 0) | |
becb115c | 1583 | ttyout(rubostring, tp); |
4147b3f6 BJ |
1584 | } |
1585 | ||
1586 | /* | |
1587 | * Reprint the rawq line. | |
1588 | * We assume c_cc has already been checked. | |
1589 | */ | |
1590 | ttyretype(tp) | |
4b72e2f9 | 1591 | register struct tty *tp; |
4147b3f6 BJ |
1592 | { |
1593 | register char *cp; | |
1594 | char *nextc(); | |
1595 | int s; | |
1596 | ||
becb115c SL |
1597 | if (tp->t_rprntc != 0377) |
1598 | ttyecho(tp->t_rprntc, tp); | |
4147b3f6 | 1599 | (void) ttyoutput('\n', tp); |
4f3a716e | 1600 | s = spltty(); |
4147b3f6 BJ |
1601 | for (cp = tp->t_canq.c_cf; cp; cp = nextc(&tp->t_canq, cp)) |
1602 | ttyecho(*cp, tp); | |
1603 | for (cp = tp->t_rawq.c_cf; cp; cp = nextc(&tp->t_rawq, cp)) | |
1604 | ttyecho(*cp, tp); | |
becb115c | 1605 | tp->t_state &= ~TS_ERASE; |
4147b3f6 BJ |
1606 | splx(s); |
1607 | tp->t_rocount = tp->t_rawq.c_cc; | |
1608 | tp->t_rocol = 0; | |
1609 | } | |
1610 | ||
1611 | /* | |
1612 | * Echo a typed character to the terminal | |
1613 | */ | |
1614 | ttyecho(c, tp) | |
4b72e2f9 SL |
1615 | register c; |
1616 | register struct tty *tp; | |
4147b3f6 BJ |
1617 | { |
1618 | ||
becb115c SL |
1619 | if ((tp->t_state&TS_CNTTB) == 0) |
1620 | tp->t_flags &= ~FLUSHO; | |
4147b3f6 BJ |
1621 | if ((tp->t_flags&ECHO) == 0) |
1622 | return; | |
1623 | c &= 0377; | |
1624 | if (tp->t_flags&RAW) { | |
1625 | (void) ttyoutput(c, tp); | |
1626 | return; | |
1627 | } | |
1628 | if (c == '\r' && tp->t_flags&CRMOD) | |
1629 | c = '\n'; | |
becb115c | 1630 | if (tp->t_flags&CTLECH) { |
4147b3f6 BJ |
1631 | if ((c&0177) <= 037 && c!='\t' && c!='\n' || (c&0177)==0177) { |
1632 | (void) ttyoutput('^', tp); | |
1633 | c &= 0177; | |
1634 | if (c == 0177) | |
1635 | c = '?'; | |
1636 | else if (tp->t_flags&LCASE) | |
1637 | c += 'a' - 1; | |
1638 | else | |
1639 | c += 'A' - 1; | |
1640 | } | |
1641 | } | |
becb115c | 1642 | (void) ttyoutput(c&0177, tp); |
4147b3f6 BJ |
1643 | } |
1644 | ||
1645 | /* | |
1646 | * Is c a break char for tp? | |
1647 | */ | |
1648 | ttbreakc(c, tp) | |
4b72e2f9 SL |
1649 | register c; |
1650 | register struct tty *tp; | |
4147b3f6 | 1651 | { |
becb115c | 1652 | return (c == '\n' || c == tp->t_eofc || c == tp->t_brkc || |
4147b3f6 BJ |
1653 | c == '\r' && (tp->t_flags&CRMOD)); |
1654 | } | |
1655 | ||
1656 | /* | |
1657 | * send string cp to tp | |
1658 | */ | |
1659 | ttyout(cp, tp) | |
4b72e2f9 SL |
1660 | register char *cp; |
1661 | register struct tty *tp; | |
4147b3f6 BJ |
1662 | { |
1663 | register char c; | |
1664 | ||
1665 | while (c = *cp++) | |
1666 | (void) ttyoutput(c, tp); | |
1667 | } | |
1668 | ||
1669 | ttwakeup(tp) | |
1670 | struct tty *tp; | |
1671 | { | |
1672 | ||
1673 | if (tp->t_rsel) { | |
1674 | selwakeup(tp->t_rsel, tp->t_state&TS_RCOLL); | |
1675 | tp->t_state &= ~TS_RCOLL; | |
1676 | tp->t_rsel = 0; | |
1677 | } | |
88a7a62a SL |
1678 | if (tp->t_state & TS_ASYNC) |
1679 | gsignal(tp->t_pgrp, SIGIO); | |
4147b3f6 BJ |
1680 | wakeup((caddr_t)&tp->t_rawq); |
1681 | } |