Commit | Line | Data |
---|---|---|
b968e450 | 1 | /* tty.c 4.42 83/06/13 */ |
961945a8 SL |
2 | |
3 | #include "../machine/reg.h" | |
89dc6dfb | 4 | |
89dc6dfb BJ |
5 | #include "../h/param.h" |
6 | #include "../h/systm.h" | |
7 | #include "../h/dir.h" | |
8 | #include "../h/user.h" | |
becb115c | 9 | #include "../h/ioctl.h" |
89dc6dfb BJ |
10 | #include "../h/tty.h" |
11 | #include "../h/proc.h" | |
89dc6dfb BJ |
12 | #include "../h/inode.h" |
13 | #include "../h/file.h" | |
89dc6dfb BJ |
14 | #include "../h/conf.h" |
15 | #include "../h/buf.h" | |
d1778415 | 16 | #include "../h/dk.h" |
d6d7360b | 17 | #include "../h/uio.h" |
894cfdb7 | 18 | #include "../h/kernel.h" |
89dc6dfb | 19 | |
8bba2b8f RE |
20 | /* |
21 | * Table giving parity for characters and indicating | |
22 | * character classes to tty driver. In particular, | |
23 | * if the low 6 bits are 0, then the character needs | |
24 | * no special processing on output. | |
25 | */ | |
26 | ||
27 | char partab[] = { | |
28 | 0001,0201,0201,0001,0201,0001,0001,0201, | |
29 | 0202,0004,0003,0201,0005,0206,0201,0001, | |
30 | 0201,0001,0001,0201,0001,0201,0201,0001, | |
31 | 0001,0201,0201,0001,0201,0001,0001,0201, | |
32 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
33 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
34 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
35 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
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 | 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 | 0000,0200,0200,0000,0200,0000,0000,0201, | |
44 | ||
45 | /* | |
46 | * 7 bit ascii ends with the last character above, | |
47 | * but we contine through all 256 codes for the sake | |
48 | * of the tty output routines which use special vax | |
49 | * instructions which need a 256 character trt table. | |
50 | */ | |
51 | ||
52 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
53 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
54 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
55 | 0007,0007,0007,0007,0007,0007,0007,0007, | |
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 | }; | |
89dc6dfb | 69 | |
89dc6dfb BJ |
70 | /* |
71 | * Input mapping table-- if an entry is non-zero, when the | |
72 | * corresponding character is typed preceded by "\" the escape | |
73 | * sequence is replaced by the table value. Mostly used for | |
74 | * upper-case only terminals. | |
75 | */ | |
89dc6dfb BJ |
76 | char maptab[] ={ |
77 | 000,000,000,000,000,000,000,000, | |
78 | 000,000,000,000,000,000,000,000, | |
79 | 000,000,000,000,000,000,000,000, | |
80 | 000,000,000,000,000,000,000,000, | |
81 | 000,'|',000,000,000,000,000,'`', | |
82 | '{','}',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 | 000,000,000,000,000,000,000,000, | |
86 | 000,000,000,000,000,000,000,000, | |
87 | 000,000,000,000,000,000,000,000, | |
88 | 000,000,000,000,000,000,'~',000, | |
89 | 000,'A','B','C','D','E','F','G', | |
90 | 'H','I','J','K','L','M','N','O', | |
91 | 'P','Q','R','S','T','U','V','W', | |
92 | 'X','Y','Z',000,000,000,000,000, | |
93 | }; | |
94 | ||
0d65848d | 95 | short tthiwat[16] = |
6f21eede | 96 | { 100,100,100,100,100,100,100,200,200,400,400,400,650,650,1300,2000 }; |
0d65848d BJ |
97 | short ttlowat[16] = |
98 | { 30, 30, 30, 30, 30, 30, 30, 50, 50,120,120,120,125,125,125,125 }; | |
99 | ||
becb115c SL |
100 | struct ttychars ttydefaults = { |
101 | CERASE, CKILL, CINTR, CQUIT, CSTART, CSTOP, CEOF, | |
102 | CBRK, CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE,CLNEXT | |
103 | }; | |
89dc6dfb | 104 | |
89dc6dfb | 105 | ttychars(tp) |
becb115c | 106 | struct tty *tp; |
89dc6dfb | 107 | { |
8062c8a7 | 108 | |
becb115c | 109 | tp->t_chars = ttydefaults; |
89dc6dfb BJ |
110 | } |
111 | ||
112 | /* | |
50e2732b | 113 | * Wait for output to drain, then flush input waiting. |
89dc6dfb | 114 | */ |
88a7a62a | 115 | ttywflush(tp) |
941944c9 | 116 | register struct tty *tp; |
89dc6dfb BJ |
117 | { |
118 | ||
88a7a62a SL |
119 | ttywait(tp); |
120 | ttyflush(tp, FREAD); | |
121 | } | |
122 | ||
123 | ttywait(tp) | |
124 | register struct tty *tp; | |
125 | { | |
126 | register int s = spl5(); | |
127 | ||
4c67f645 BJ |
128 | while (tp->t_outq.c_cc && tp->t_state&TS_CARR_ON |
129 | && tp->t_oproc) { /* kludge for pty */ | |
50e2732b | 130 | (*tp->t_oproc)(tp); |
941944c9 | 131 | tp->t_state |= TS_ASLEEP; |
50e2732b BJ |
132 | sleep((caddr_t)&tp->t_outq, TTOPRI); |
133 | } | |
875a1e2c | 134 | splx(s); |
89dc6dfb BJ |
135 | } |
136 | ||
137 | /* | |
becb115c | 138 | * Flush all TTY queues |
89dc6dfb | 139 | */ |
88a7a62a | 140 | ttyflush(tp, rw) |
4b72e2f9 | 141 | register struct tty *tp; |
89dc6dfb | 142 | { |
50e2732b BJ |
143 | register s; |
144 | ||
50e2732b BJ |
145 | s = spl6(); |
146 | if (rw & FREAD) { | |
147 | while (getc(&tp->t_canq) >= 0) | |
148 | ; | |
149 | wakeup((caddr_t)&tp->t_rawq); | |
150 | } | |
151 | if (rw & FWRITE) { | |
152 | wakeup((caddr_t)&tp->t_outq); | |
941944c9 | 153 | tp->t_state &= ~TS_TTSTOP; |
39697bd8 | 154 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, rw); |
50e2732b BJ |
155 | while (getc(&tp->t_outq) >= 0) |
156 | ; | |
157 | } | |
158 | if (rw & FREAD) { | |
159 | while (getc(&tp->t_rawq) >= 0) | |
160 | ; | |
161 | tp->t_delct = 0; | |
becb115c | 162 | tp->t_rocount = 0; |
50e2732b | 163 | tp->t_rocol = 0; |
becb115c | 164 | tp->t_state &= ~TS_LOCAL; |
50e2732b BJ |
165 | } |
166 | splx(s); | |
89dc6dfb BJ |
167 | } |
168 | ||
50e2732b BJ |
169 | /* |
170 | * Send stop character on input overflow. | |
171 | */ | |
172 | ttyblock(tp) | |
4b72e2f9 | 173 | register struct tty *tp; |
89dc6dfb | 174 | { |
50e2732b | 175 | register x; |
becb115c | 176 | |
50e2732b BJ |
177 | x = tp->t_rawq.c_cc + tp->t_canq.c_cc; |
178 | if (tp->t_rawq.c_cc > TTYHOG) { | |
88a7a62a | 179 | ttyflush(tp, FREAD|FWRITE); |
941944c9 | 180 | tp->t_state &= ~TS_TBLOCK; |
50e2732b | 181 | } |
becb115c SL |
182 | if (x >= TTYHOG/2 && putc(tp->t_stopc, &tp->t_outq) == 0) { |
183 | tp->t_state |= TS_TBLOCK; | |
becb115c | 184 | ttstart(tp); |
50e2732b | 185 | } |
89dc6dfb BJ |
186 | } |
187 | ||
101ba270 | 188 | /* |
50e2732b BJ |
189 | * Restart typewriter output following a delay |
190 | * timeout. | |
191 | * The name of the routine is passed to the timeout | |
192 | * subroutine and it is called during a clock interrupt. | |
101ba270 | 193 | */ |
50e2732b | 194 | ttrstrt(tp) |
4b72e2f9 | 195 | register struct tty *tp; |
101ba270 BJ |
196 | { |
197 | ||
becb115c SL |
198 | if (tp == 0) |
199 | panic("ttrstrt"); | |
941944c9 | 200 | tp->t_state &= ~TS_TIMEOUT; |
50e2732b | 201 | ttstart(tp); |
101ba270 BJ |
202 | } |
203 | ||
89dc6dfb | 204 | /* |
50e2732b BJ |
205 | * Start output on the typewriter. It is used from the top half |
206 | * after some characters have been put on the output queue, | |
207 | * from the interrupt routine to transmit the next | |
208 | * character, and after a timeout has finished. | |
89dc6dfb | 209 | */ |
50e2732b | 210 | ttstart(tp) |
4b72e2f9 | 211 | register struct tty *tp; |
89dc6dfb | 212 | { |
50e2732b | 213 | register s; |
8062c8a7 | 214 | |
50e2732b | 215 | s = spl5(); |
becb115c | 216 | if ((tp->t_state & (TS_TIMEOUT|TS_TTSTOP|TS_BUSY)) == 0 && |
4c67f645 | 217 | tp->t_oproc) /* kludge for pty */ |
50e2732b BJ |
218 | (*tp->t_oproc)(tp); |
219 | splx(s); | |
89dc6dfb BJ |
220 | } |
221 | ||
222 | /* | |
50e2732b | 223 | * Common code for tty ioctls. |
89dc6dfb | 224 | */ |
49c84d3f | 225 | /*ARGSUSED*/ |
4b72e2f9 SL |
226 | ttioctl(tp, com, data, flag) |
227 | register struct tty *tp; | |
228 | caddr_t data; | |
89dc6dfb | 229 | { |
840510a3 | 230 | int dev = tp->t_dev; |
89dc6dfb | 231 | extern int nldisp; |
fc6972ae | 232 | int s; |
88a7a62a | 233 | register int newflags; |
89dc6dfb | 234 | |
50e2732b BJ |
235 | /* |
236 | * If the ioctl involves modification, | |
237 | * insist on being able to write the device, | |
238 | * and hang if in the background. | |
239 | */ | |
4b72e2f9 | 240 | switch (com) { |
50e2732b | 241 | |
c6fe3a50 BJ |
242 | case TIOCSETD: |
243 | case TIOCSETP: | |
244 | case TIOCSETN: | |
50e2732b BJ |
245 | case TIOCFLUSH: |
246 | case TIOCSETC: | |
247 | case TIOCSLTC: | |
248 | case TIOCSPGRP: | |
249 | case TIOCLBIS: | |
250 | case TIOCLBIC: | |
251 | case TIOCLSET: | |
8203fe05 | 252 | case TIOCSTI: |
50e2732b BJ |
253 | while (tp->t_line == NTTYDISC && |
254 | u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && | |
255 | (u.u_procp->p_flag&SVFORK) == 0 && | |
256 | u.u_signal[SIGTTOU] != SIG_IGN && | |
fc6972ae | 257 | u.u_signal[SIGTTOU] != SIG_HOLD) { |
50e2732b BJ |
258 | gsignal(u.u_procp->p_pgrp, SIGTTOU); |
259 | sleep((caddr_t)&lbolt, TTOPRI); | |
260 | } | |
261 | break; | |
262 | } | |
263 | ||
becb115c SL |
264 | /* |
265 | * Process the ioctl. | |
266 | */ | |
4b72e2f9 | 267 | switch (com) { |
89dc6dfb | 268 | |
fc6972ae | 269 | /* get discipline number */ |
89dc6dfb | 270 | case TIOCGETD: |
4b72e2f9 | 271 | *(int *)data = tp->t_line; |
89dc6dfb BJ |
272 | break; |
273 | ||
fc6972ae | 274 | /* set line discipline */ |
4b72e2f9 SL |
275 | case TIOCSETD: { |
276 | register int t = *(int *)data; | |
becb115c | 277 | int error = 0; |
4b72e2f9 | 278 | |
4a003df3 SL |
279 | if (t >= nldisp) |
280 | return (ENXIO); | |
fc6972ae | 281 | s = spl5(); |
89dc6dfb BJ |
282 | if (tp->t_line) |
283 | (*linesw[tp->t_line].l_close)(tp); | |
284 | if (t) | |
fc6972ae BJ |
285 | error = (*linesw[t].l_open)(dev, tp); |
286 | splx(s); | |
4a003df3 SL |
287 | if (error) { |
288 | s = spl5(); | |
289 | if (tp->t_line) | |
290 | (void) (*linesw[tp->t_line].l_open)(dev, tp); | |
291 | splx(s); | |
fc6972ae | 292 | return (error); |
4a003df3 | 293 | } |
fc6972ae | 294 | tp->t_line = t; |
89dc6dfb | 295 | break; |
4b72e2f9 | 296 | } |
89dc6dfb | 297 | |
fc6972ae | 298 | /* prevent more opens on channel */ |
152c2598 BJ |
299 | case TIOCEXCL: |
300 | tp->t_state |= TS_XCLUDE; | |
301 | break; | |
302 | ||
303 | case TIOCNXCL: | |
304 | tp->t_state &= ~TS_XCLUDE; | |
305 | break; | |
306 | ||
fc6972ae | 307 | /* hang up line on last close */ |
89dc6dfb | 308 | case TIOCHPCL: |
941944c9 | 309 | tp->t_state |= TS_HUPCLS; |
89dc6dfb BJ |
310 | break; |
311 | ||
7d973a4d | 312 | case TIOCFLUSH: { |
4b72e2f9 SL |
313 | register int flags = *(int *)data; |
314 | ||
315 | if (flags == 0) | |
7d973a4d | 316 | flags = FREAD|FWRITE; |
4b72e2f9 SL |
317 | else |
318 | flags &= FREAD|FWRITE; | |
88a7a62a | 319 | ttyflush(tp, flags); |
89dc6dfb | 320 | break; |
4568c08e | 321 | } |
89dc6dfb | 322 | |
fc6972ae | 323 | /* return number of characters immediately available */ |
4b72e2f9 SL |
324 | case FIONREAD: |
325 | *(off_t *)data = ttnread(tp); | |
8062c8a7 | 326 | break; |
8062c8a7 | 327 | |
b968e450 SL |
328 | case TIOCOUTQ: |
329 | *(int *)data = tp->t_outq.c_cc; | |
330 | break; | |
331 | ||
a8d3bf7f BJ |
332 | case TIOCSTOP: |
333 | s = spl5(); | |
becb115c | 334 | if ((tp->t_state&TS_TTSTOP) == 0) { |
bfcf09ee BJ |
335 | tp->t_state |= TS_TTSTOP; |
336 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
337 | } | |
4b72e2f9 | 338 | splx(s); |
bfcf09ee BJ |
339 | break; |
340 | ||
a8d3bf7f BJ |
341 | case TIOCSTART: |
342 | s = spl5(); | |
becb115c | 343 | if ((tp->t_state&TS_TTSTOP) || (tp->t_flags&FLUSHO)) { |
bfcf09ee | 344 | tp->t_state &= ~TS_TTSTOP; |
becb115c | 345 | tp->t_flags &= ~FLUSHO; |
bfcf09ee BJ |
346 | ttstart(tp); |
347 | } | |
4b72e2f9 | 348 | splx(s); |
bfcf09ee BJ |
349 | break; |
350 | ||
8203fe05 SL |
351 | /* |
352 | * Simulate typing of a character at the terminal. | |
353 | */ | |
354 | case TIOCSTI: | |
355 | if (u.u_uid && u.u_ttyp != tp) | |
356 | return (EACCES); | |
becb115c | 357 | (*linesw[tp->t_line].l_rint)(*(char *)data, tp); |
8203fe05 SL |
358 | break; |
359 | ||
88a7a62a SL |
360 | case TIOCSETP: |
361 | case TIOCSETN: { | |
362 | register struct sgttyb *sg = (struct sgttyb *)data; | |
363 | ||
364 | tp->t_erase = sg->sg_erase; | |
365 | tp->t_kill = sg->sg_kill; | |
366 | tp->t_ispeed = sg->sg_ispeed; | |
367 | tp->t_ospeed = sg->sg_ospeed; | |
368 | newflags = (tp->t_flags&0xffff0000) | (sg->sg_flags&0xffff); | |
88a7a62a SL |
369 | s = spl5(); |
370 | if (tp->t_flags&RAW || newflags&RAW || com == TIOCSETP) { | |
371 | ttywait(tp); | |
372 | ttyflush(tp, FREAD); | |
373 | } else if ((tp->t_flags&CBREAK) != (newflags&CBREAK)) { | |
374 | if (newflags&CBREAK) { | |
375 | struct clist tq; | |
376 | ||
377 | catq(&tp->t_rawq, &tp->t_canq); | |
378 | tq = tp->t_rawq; | |
379 | tp->t_rawq = tp->t_canq; | |
380 | tp->t_canq = tq; | |
381 | } else { | |
382 | tp->t_flags |= PENDIN; | |
383 | ttwakeup(tp); | |
384 | } | |
385 | } | |
386 | tp->t_flags = newflags; | |
387 | if (tp->t_flags&RAW) { | |
388 | tp->t_state &= ~TS_TTSTOP; | |
389 | ttstart(tp); | |
390 | } | |
391 | splx(s); | |
392 | break; | |
393 | } | |
394 | ||
395 | /* send current parameters to user */ | |
396 | case TIOCGETP: { | |
397 | register struct sgttyb *sg = (struct sgttyb *)data; | |
398 | ||
399 | sg->sg_ispeed = tp->t_ispeed; | |
400 | sg->sg_ospeed = tp->t_ospeed; | |
401 | sg->sg_erase = tp->t_erase; | |
402 | sg->sg_kill = tp->t_kill; | |
403 | sg->sg_flags = tp->t_flags; | |
404 | break; | |
405 | } | |
406 | ||
407 | case FIONBIO: | |
408 | if (*(int *)data) | |
409 | tp->t_state |= TS_NBIO; | |
410 | else | |
411 | tp->t_state &= ~TS_NBIO; | |
412 | break; | |
413 | ||
414 | case FIOASYNC: | |
415 | if (*(int *)data) | |
416 | tp->t_state |= TS_ASYNC; | |
417 | else | |
418 | tp->t_state &= ~TS_ASYNC; | |
419 | break; | |
420 | ||
b968e450 SL |
421 | case TIOCGETC: |
422 | bcopy((caddr_t)&tp->t_intrc, data, sizeof (struct tchars)); | |
423 | break; | |
424 | ||
425 | case TIOCSETC: | |
426 | bcopy(data, (caddr_t)&tp->t_intrc, sizeof (struct tchars)); | |
427 | break; | |
428 | ||
88a7a62a SL |
429 | /* set/get local special characters */ |
430 | case TIOCSLTC: | |
431 | bcopy(data, (caddr_t)&tp->t_suspc, sizeof (struct ltchars)); | |
432 | break; | |
433 | ||
434 | case TIOCGLTC: | |
435 | bcopy((caddr_t)&tp->t_suspc, data, sizeof (struct ltchars)); | |
436 | break; | |
437 | ||
438 | /* | |
439 | * Modify local mode word. | |
440 | */ | |
441 | case TIOCLBIS: | |
442 | tp->t_flags |= *(int *)data << 16; | |
443 | break; | |
444 | ||
445 | case TIOCLBIC: | |
446 | tp->t_flags &= ~(*(int *)data << 16); | |
447 | break; | |
448 | ||
449 | case TIOCLSET: | |
450 | tp->t_flags &= 0xffff; | |
451 | tp->t_flags |= *(int *)data << 16; | |
452 | break; | |
453 | ||
454 | case TIOCLGET: | |
455 | *(int *)data = tp->t_flags >> 16; | |
456 | break; | |
457 | ||
458 | /* should allow SPGRP and GPGRP only if tty open for reading */ | |
459 | case TIOCSPGRP: | |
460 | tp->t_pgrp = *(int *)data; | |
461 | break; | |
462 | ||
463 | case TIOCGPGRP: | |
464 | *(int *)data = tp->t_pgrp; | |
465 | break; | |
466 | ||
89dc6dfb | 467 | default: |
fc6972ae | 468 | return (-1); |
89dc6dfb | 469 | } |
fc6972ae | 470 | return (0); |
89dc6dfb | 471 | } |
e1d74936 BJ |
472 | |
473 | ttnread(tp) | |
474 | struct tty *tp; | |
475 | { | |
476 | int nread = 0; | |
477 | ||
becb115c | 478 | if (tp->t_flags & PENDIN) |
e1d74936 BJ |
479 | ttypend(tp); |
480 | nread = tp->t_canq.c_cc; | |
481 | if (tp->t_flags & (RAW|CBREAK)) | |
482 | nread += tp->t_rawq.c_cc; | |
483 | return (nread); | |
484 | } | |
485 | ||
941944c9 | 486 | ttselect(dev, rw) |
e1d74936 | 487 | dev_t dev; |
941944c9 | 488 | int rw; |
e1d74936 BJ |
489 | { |
490 | register struct tty *tp = &cdevsw[major(dev)].d_ttys[minor(dev)]; | |
491 | int nread; | |
941944c9 | 492 | int s = spl5(); |
e1d74936 | 493 | |
941944c9 | 494 | switch (rw) { |
e1d74936 BJ |
495 | |
496 | case FREAD: | |
497 | nread = ttnread(tp); | |
498 | if (nread > 0) | |
941944c9 | 499 | goto win; |
89b8a44c | 500 | if (tp->t_rsel && tp->t_rsel->p_wchan == (caddr_t)&selwait) |
941944c9 | 501 | tp->t_state |= TS_RCOLL; |
e1d74936 BJ |
502 | else |
503 | tp->t_rsel = u.u_procp; | |
941944c9 | 504 | break; |
e1d74936 | 505 | |
941944c9 BJ |
506 | case FWRITE: |
507 | if (tp->t_outq.c_cc <= TTLOWAT(tp)) | |
508 | goto win; | |
941944c9 BJ |
509 | if (tp->t_wsel && tp->t_wsel->p_wchan == (caddr_t)&selwait) |
510 | tp->t_state |= TS_WCOLL; | |
511 | else | |
512 | tp->t_wsel = u.u_procp; | |
513 | break; | |
e1d74936 | 514 | } |
941944c9 BJ |
515 | splx(s); |
516 | return (0); | |
517 | win: | |
518 | splx(s); | |
519 | return (1); | |
e1d74936 | 520 | } |
8bba2b8f | 521 | |
4147b3f6 | 522 | /* |
becb115c | 523 | * Establish a process group for distribution of |
4147b3f6 | 524 | * quits and interrupts from the tty. |
4147b3f6 BJ |
525 | */ |
526 | ttyopen(dev, tp) | |
4b72e2f9 SL |
527 | dev_t dev; |
528 | register struct tty *tp; | |
4147b3f6 BJ |
529 | { |
530 | register struct proc *pp; | |
531 | ||
532 | pp = u.u_procp; | |
533 | tp->t_dev = dev; | |
4b72e2f9 | 534 | if (pp->p_pgrp == 0) { |
4147b3f6 BJ |
535 | u.u_ttyp = tp; |
536 | u.u_ttyd = dev; | |
537 | if (tp->t_pgrp == 0) | |
538 | tp->t_pgrp = pp->p_pid; | |
539 | pp->p_pgrp = tp->t_pgrp; | |
540 | } | |
541 | tp->t_state &= ~TS_WOPEN; | |
542 | tp->t_state |= TS_ISOPEN; | |
543 | if (tp->t_line != NTTYDISC) | |
88a7a62a | 544 | ttywflush(tp); |
fc6972ae | 545 | return (0); |
4147b3f6 BJ |
546 | } |
547 | ||
548 | /* | |
549 | * clean tp on last close | |
550 | */ | |
551 | ttyclose(tp) | |
4b72e2f9 | 552 | register struct tty *tp; |
4147b3f6 BJ |
553 | { |
554 | ||
555 | if (tp->t_line) { | |
88a7a62a | 556 | ttywflush(tp); |
4147b3f6 BJ |
557 | tp->t_line = 0; |
558 | return; | |
559 | } | |
560 | tp->t_pgrp = 0; | |
88a7a62a | 561 | ttywflush(tp); |
4147b3f6 BJ |
562 | tp->t_state = 0; |
563 | } | |
564 | ||
565 | /* | |
566 | * reinput pending characters after state switch | |
567 | * call at spl5(). | |
568 | */ | |
569 | ttypend(tp) | |
4b72e2f9 | 570 | register struct tty *tp; |
4147b3f6 BJ |
571 | { |
572 | struct clist tq; | |
573 | register c; | |
574 | ||
becb115c SL |
575 | tp->t_flags &= ~PENDIN; |
576 | tp->t_state |= TS_TYPEN; | |
4147b3f6 BJ |
577 | tq = tp->t_rawq; |
578 | tp->t_rawq.c_cc = 0; | |
579 | tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0; | |
580 | while ((c = getc(&tq)) >= 0) | |
581 | ttyinput(c, tp); | |
becb115c | 582 | tp->t_state &= ~TS_TYPEN; |
4147b3f6 BJ |
583 | } |
584 | ||
585 | /* | |
becb115c SL |
586 | * Place a character on raw TTY input queue, |
587 | * putting in delimiters and waking up top | |
588 | * half as needed. Also echo if required. | |
589 | * The arguments are the character and the | |
590 | * appropriate tty structure. | |
4147b3f6 BJ |
591 | */ |
592 | ttyinput(c, tp) | |
4b72e2f9 SL |
593 | register c; |
594 | register struct tty *tp; | |
4147b3f6 | 595 | { |
becb115c | 596 | register int t_flags = tp->t_flags; |
4147b3f6 BJ |
597 | int i; |
598 | ||
becb115c SL |
599 | /* |
600 | * If input is pending take it first. | |
601 | */ | |
602 | if (t_flags&PENDIN) | |
4147b3f6 BJ |
603 | ttypend(tp); |
604 | tk_nin++; | |
605 | c &= 0377; | |
becb115c SL |
606 | |
607 | /* | |
608 | * In tandem mode, check high water mark. | |
609 | */ | |
4147b3f6 BJ |
610 | if (t_flags&TANDEM) |
611 | ttyblock(tp); | |
becb115c SL |
612 | |
613 | if (t_flags&RAW) { | |
614 | /* | |
615 | * Raw mode, just put character | |
616 | * in input q w/o interpretation. | |
617 | */ | |
618 | if (tp->t_rawq.c_cc > TTYHOG) | |
88a7a62a | 619 | ttyflush(tp, FREAD|FWRITE); |
becb115c SL |
620 | else { |
621 | if (putc(c, &tp->t_rawq) >= 0) | |
622 | ttwakeup(tp); | |
623 | ttyecho(c, tp); | |
4147b3f6 | 624 | } |
becb115c SL |
625 | goto endcase; |
626 | } | |
627 | ||
628 | /* | |
629 | * Ignore any high bit added during | |
630 | * previous ttyinput processing. | |
631 | */ | |
632 | if ((tp->t_state&TS_TYPEN) == 0) | |
633 | c &= 0177; | |
634 | /* | |
635 | * Check for literal nexting very first | |
636 | */ | |
637 | if (tp->t_state&TS_LNCH) { | |
638 | c |= 0200; | |
639 | tp->t_state &= ~TS_LNCH; | |
640 | } | |
641 | ||
642 | /* | |
643 | * Scan for special characters. This code | |
644 | * is really just a big case statement with | |
645 | * non-constant cases. The bottom of the | |
646 | * case statement is labeled ``endcase'', so goto | |
647 | * it after a case match, or similar. | |
648 | */ | |
649 | if (tp->t_line == NTTYDISC) { | |
650 | if (c == tp->t_lnextc) { | |
4147b3f6 BJ |
651 | if (tp->t_flags&ECHO) |
652 | ttyout("^\b", tp); | |
becb115c SL |
653 | tp->t_state |= TS_LNCH; |
654 | goto endcase; | |
655 | } | |
656 | if (c == tp->t_flushc) { | |
657 | if (tp->t_flags&FLUSHO) | |
658 | tp->t_flags &= ~FLUSHO; | |
4147b3f6 | 659 | else { |
88a7a62a | 660 | ttyflush(tp, FWRITE); |
4147b3f6 | 661 | ttyecho(c, tp); |
becb115c | 662 | if (tp->t_rawq.c_cc + tp->t_canq.c_cc) |
4147b3f6 | 663 | ttyretype(tp); |
becb115c | 664 | tp->t_flags |= FLUSHO; |
4147b3f6 | 665 | } |
becb115c SL |
666 | goto startoutput; |
667 | } | |
668 | if (c == tp->t_suspc) { | |
669 | if ((tp->t_flags&NOFLSH) == 0) | |
88a7a62a | 670 | ttyflush(tp, FREAD); |
4147b3f6 | 671 | ttyecho(c, tp); |
becb115c SL |
672 | gsignal(tp->t_pgrp, SIGTSTP); |
673 | goto endcase; | |
674 | } | |
675 | } | |
676 | ||
677 | /* | |
678 | * Handle start/stop characters. | |
679 | */ | |
680 | if (c == tp->t_stopc) { | |
681 | if ((tp->t_state&TS_TTSTOP) == 0) { | |
682 | tp->t_state |= TS_TTSTOP; | |
683 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
684 | return; | |
685 | } | |
686 | if (c != tp->t_startc) | |
687 | return; | |
688 | goto endcase; | |
689 | } | |
690 | if (c == tp->t_startc) | |
691 | goto restartoutput; | |
692 | ||
693 | /* | |
694 | * Look for interrupt/quit chars. | |
695 | */ | |
696 | if (c == tp->t_intrc || c == tp->t_quitc) { | |
697 | if ((tp->t_flags&NOFLSH) == 0) | |
88a7a62a | 698 | ttyflush(tp, FREAD|FWRITE); |
becb115c SL |
699 | ttyecho(c, tp); |
700 | gsignal(tp->t_pgrp, c == tp->t_intrc ? SIGINT : SIGQUIT); | |
701 | goto endcase; | |
702 | } | |
703 | ||
704 | /* | |
705 | * Cbreak mode, don't process line editing | |
706 | * characters; check high water mark for wakeup. | |
707 | */ | |
708 | if (t_flags&CBREAK) { | |
709 | if (tp->t_rawq.c_cc > TTYHOG) { | |
4147b3f6 BJ |
710 | if (tp->t_outq.c_cc < TTHIWAT(tp) && |
711 | tp->t_line == NTTYDISC) | |
712 | (void) ttyoutput(CTRL(g), tp); | |
713 | } else if (putc(c, &tp->t_rawq) >= 0) { | |
714 | ttwakeup(tp); | |
715 | ttyecho(c, tp); | |
716 | } | |
becb115c SL |
717 | goto endcase; |
718 | } | |
719 | ||
720 | /* | |
721 | * From here on down cooked mode character | |
722 | * processing takes place. | |
723 | */ | |
724 | if ((tp->t_state&TS_QUOT) && | |
725 | (c == tp->t_erase || c == tp->t_kill)) { | |
726 | ttyrub(unputc(&tp->t_rawq), tp); | |
727 | c |= 0200; | |
728 | } | |
729 | if (c == tp->t_erase) { | |
730 | if (tp->t_rawq.c_cc) | |
731 | ttyrub(unputc(&tp->t_rawq), tp); | |
732 | goto endcase; | |
733 | } | |
734 | if (c == tp->t_kill) { | |
735 | if (tp->t_flags&CRTKIL && | |
736 | tp->t_rawq.c_cc == tp->t_rocount) { | |
737 | while (tp->t_rawq.c_cc) | |
738 | ttyrub(unputc(&tp->t_rawq), tp); | |
739 | } else { | |
740 | ttyecho(c, tp); | |
741 | ttyecho('\n', tp); | |
742 | while (getc(&tp->t_rawq) > 0) | |
743 | ; | |
744 | tp->t_rocount = 0; | |
745 | } | |
746 | tp->t_state &= ~TS_LOCAL; | |
747 | goto endcase; | |
748 | } | |
749 | ||
750 | /* | |
751 | * New line discipline, | |
752 | * check word erase/reprint line. | |
753 | */ | |
754 | if (tp->t_line == NTTYDISC) { | |
755 | if (c == tp->t_werasc) { | |
756 | if (tp->t_rawq.c_cc == 0) | |
757 | goto endcase; | |
758 | do { | |
759 | c = unputc(&tp->t_rawq); | |
760 | if (c != ' ' && c != '\t') | |
761 | goto erasenb; | |
762 | ttyrub(c, tp); | |
763 | } while (tp->t_rawq.c_cc); | |
764 | goto endcase; | |
765 | erasenb: | |
766 | do { | |
767 | ttyrub(c, tp); | |
768 | if (tp->t_rawq.c_cc == 0) | |
769 | goto endcase; | |
770 | c = unputc(&tp->t_rawq); | |
771 | } while (c != ' ' && c != '\t'); | |
772 | (void) putc(c, &tp->t_rawq); | |
773 | goto endcase; | |
774 | } | |
775 | if (c == tp->t_rprntc) { | |
776 | ttyretype(tp); | |
777 | goto endcase; | |
778 | } | |
779 | } | |
780 | ||
781 | /* | |
782 | * Check for input buffer overflow | |
783 | */ | |
7c9f96c0 SL |
784 | if (tp->t_rawq.c_cc+tp->t_canq.c_cc >= TTYHOG) { |
785 | if (tp->t_line == NTTYDISC) | |
786 | (void) ttyoutput(CTRL(g), tp); | |
becb115c | 787 | goto endcase; |
7c9f96c0 | 788 | } |
becb115c SL |
789 | |
790 | /* | |
791 | * Put data char in q for user and | |
792 | * wakeup on seeing a line delimiter. | |
793 | */ | |
794 | if (putc(c, &tp->t_rawq) >= 0) { | |
becb115c SL |
795 | if (ttbreakc(c, tp)) { |
796 | tp->t_rocount = 0; | |
797 | catq(&tp->t_rawq, &tp->t_canq); | |
4147b3f6 | 798 | ttwakeup(tp); |
becb115c SL |
799 | } else if (tp->t_rocount++ == 0) |
800 | tp->t_rocol = tp->t_col; | |
801 | tp->t_state &= ~TS_QUOT; | |
802 | if (c == '\\') | |
803 | tp->t_state |= TS_QUOT; | |
804 | if (tp->t_state&TS_ERASE) { | |
805 | tp->t_state &= ~TS_ERASE; | |
806 | (void) ttyoutput('/', tp); | |
807 | } | |
808 | i = tp->t_col; | |
4147b3f6 | 809 | ttyecho(c, tp); |
becb115c SL |
810 | if (c == tp->t_eofc && tp->t_flags&ECHO) { |
811 | i = MIN(2, tp->t_col - i); | |
812 | while (i > 0) { | |
813 | (void) ttyoutput('\b', tp); | |
814 | i--; | |
815 | } | |
816 | } | |
4147b3f6 | 817 | } |
becb115c SL |
818 | |
819 | endcase: | |
820 | /* | |
821 | * If DEC-style start/stop is enabled don't restart | |
822 | * output until seeing the start character. | |
823 | */ | |
824 | if (tp->t_flags&DECCTQ && tp->t_state&TS_TTSTOP && | |
825 | tp->t_startc != tp->t_stopc) | |
4147b3f6 | 826 | return; |
becb115c SL |
827 | |
828 | restartoutput: | |
4147b3f6 | 829 | tp->t_state &= ~TS_TTSTOP; |
becb115c SL |
830 | tp->t_flags &= ~FLUSHO; |
831 | ||
832 | startoutput: | |
4147b3f6 BJ |
833 | ttstart(tp); |
834 | } | |
835 | ||
836 | /* | |
becb115c | 837 | * Put character on TTY output queue, adding delays, |
4147b3f6 | 838 | * expanding tabs, and handling the CR/NL bit. |
becb115c SL |
839 | * This is called both from the top half for output, |
840 | * and from interrupt level for echoing. | |
4147b3f6 BJ |
841 | * The arguments are the character and the tty structure. |
842 | * Returns < 0 if putc succeeds, otherwise returns char to resend | |
843 | * Must be recursive. | |
844 | */ | |
845 | ttyoutput(c, tp) | |
846 | register c; | |
847 | register struct tty *tp; | |
848 | { | |
849 | register char *colp; | |
850 | register ctype; | |
851 | ||
becb115c SL |
852 | if (tp->t_flags & (RAW|LITOUT)) { |
853 | if (tp->t_flags&FLUSHO) | |
4147b3f6 BJ |
854 | return (-1); |
855 | if (putc(c, &tp->t_outq)) | |
4b72e2f9 | 856 | return (c); |
4147b3f6 BJ |
857 | tk_nout++; |
858 | return (-1); | |
859 | } | |
becb115c | 860 | |
4147b3f6 | 861 | /* |
becb115c SL |
862 | * Ignore EOT in normal mode to avoid |
863 | * hanging up certain terminals. | |
4147b3f6 BJ |
864 | */ |
865 | c &= 0177; | |
becb115c | 866 | if (c == CEOT && (tp->t_flags&CBREAK) == 0) |
4147b3f6 BJ |
867 | return (-1); |
868 | /* | |
869 | * Turn tabs to spaces as required | |
870 | */ | |
becb115c | 871 | if (c == '\t' && (tp->t_flags&TBDELAY) == XTABS) { |
4147b3f6 BJ |
872 | register int s; |
873 | ||
874 | c = 8 - (tp->t_col&7); | |
becb115c | 875 | if ((tp->t_flags&FLUSHO) == 0) { |
4147b3f6 BJ |
876 | s = spl5(); /* don't interrupt tabs */ |
877 | c -= b_to_q(" ", c, &tp->t_outq); | |
878 | tk_nout += c; | |
879 | splx(s); | |
880 | } | |
881 | tp->t_col += c; | |
882 | return (c ? -1 : '\t'); | |
883 | } | |
884 | tk_nout++; | |
885 | /* | |
886 | * for upper-case-only terminals, | |
887 | * generate escapes. | |
888 | */ | |
889 | if (tp->t_flags&LCASE) { | |
890 | colp = "({)}!|^~'`"; | |
4b72e2f9 SL |
891 | while (*colp++) |
892 | if (c == *colp++) { | |
4147b3f6 BJ |
893 | if (ttyoutput('\\', tp) >= 0) |
894 | return (c); | |
895 | c = colp[-2]; | |
896 | break; | |
897 | } | |
becb115c | 898 | if ('A' <= c && c <= 'Z') { |
4147b3f6 BJ |
899 | if (ttyoutput('\\', tp) >= 0) |
900 | return (c); | |
becb115c | 901 | } else if ('a' <= c && c <= 'z') |
4147b3f6 BJ |
902 | c += 'A' - 'a'; |
903 | } | |
becb115c | 904 | |
4147b3f6 BJ |
905 | /* |
906 | * turn <nl> to <cr><lf> if desired. | |
907 | */ | |
becb115c | 908 | if (c == '\n' && tp->t_flags&CRMOD) |
4147b3f6 BJ |
909 | if (ttyoutput('\r', tp) >= 0) |
910 | return (c); | |
becb115c | 911 | if (c == '~' && tp->t_flags&TILDE) |
4147b3f6 | 912 | c = '`'; |
becb115c | 913 | if ((tp->t_flags&FLUSHO) == 0 && putc(c, &tp->t_outq)) |
4147b3f6 BJ |
914 | return (c); |
915 | /* | |
916 | * Calculate delays. | |
917 | * The numbers here represent clock ticks | |
918 | * and are not necessarily optimal for all terminals. | |
919 | * The delays are indicated by characters above 0200. | |
920 | * In raw mode there are no delays and the | |
921 | * transmission path is 8 bits wide. | |
becb115c SL |
922 | * |
923 | * SHOULD JUST ALLOW USER TO SPECIFY DELAYS | |
4147b3f6 BJ |
924 | */ |
925 | colp = &tp->t_col; | |
926 | ctype = partab[c]; | |
927 | c = 0; | |
928 | switch (ctype&077) { | |
929 | ||
930 | case ORDINARY: | |
931 | (*colp)++; | |
932 | ||
933 | case CONTROL: | |
934 | break; | |
935 | ||
936 | case BACKSPACE: | |
937 | if (*colp) | |
938 | (*colp)--; | |
939 | break; | |
940 | ||
941 | case NEWLINE: | |
942 | ctype = (tp->t_flags >> 8) & 03; | |
4b72e2f9 | 943 | if (ctype == 1) { /* tty 37 */ |
88a7a62a | 944 | if (*colp > 0) |
4147b3f6 | 945 | c = max(((unsigned)*colp>>4) + 3, (unsigned)6); |
becb115c | 946 | } else if (ctype == 2) /* vt05 */ |
4147b3f6 | 947 | c = 6; |
4147b3f6 BJ |
948 | *colp = 0; |
949 | break; | |
950 | ||
951 | case TAB: | |
952 | ctype = (tp->t_flags >> 10) & 03; | |
4b72e2f9 | 953 | if (ctype == 1) { /* tty 37 */ |
4147b3f6 | 954 | c = 1 - (*colp | ~07); |
4b72e2f9 | 955 | if (c < 5) |
4147b3f6 BJ |
956 | c = 0; |
957 | } | |
958 | *colp |= 07; | |
959 | (*colp)++; | |
960 | break; | |
961 | ||
962 | case VTAB: | |
becb115c | 963 | if (tp->t_flags&VTDELAY) /* tty 37 */ |
4147b3f6 BJ |
964 | c = 0177; |
965 | break; | |
966 | ||
967 | case RETURN: | |
968 | ctype = (tp->t_flags >> 12) & 03; | |
becb115c | 969 | if (ctype == 1) /* tn 300 */ |
4147b3f6 | 970 | c = 5; |
becb115c | 971 | else if (ctype == 2) /* ti 700 */ |
4147b3f6 | 972 | c = 10; |
becb115c | 973 | else if (ctype == 3) { /* concept 100 */ |
4147b3f6 | 974 | int i; |
becb115c | 975 | |
4147b3f6 | 976 | if ((i = *colp) >= 0) |
becb115c | 977 | for (; i < 9; i++) |
4147b3f6 BJ |
978 | (void) putc(0177, &tp->t_outq); |
979 | } | |
980 | *colp = 0; | |
981 | } | |
becb115c | 982 | if (c && (tp->t_flags&FLUSHO) == 0) |
4147b3f6 BJ |
983 | (void) putc(c|0200, &tp->t_outq); |
984 | return (-1); | |
985 | } | |
986 | ||
987 | /* | |
988 | * Called from device's read routine after it has | |
989 | * calculated the tty-structure given as argument. | |
990 | */ | |
d6d7360b | 991 | ttread(tp, uio) |
4b72e2f9 | 992 | register struct tty *tp; |
d6d7360b | 993 | struct uio *uio; |
4147b3f6 BJ |
994 | { |
995 | register struct clist *qp; | |
becb115c | 996 | register c, t_flags; |
875a1e2c | 997 | int s, first, error = 0; |
4147b3f6 BJ |
998 | |
999 | if ((tp->t_state&TS_CARR_ON)==0) | |
840510a3 | 1000 | return (EIO); |
4147b3f6 | 1001 | loop: |
becb115c SL |
1002 | /* |
1003 | * Take any pending input first. | |
1004 | */ | |
875a1e2c | 1005 | s = spl5(); |
becb115c | 1006 | if (tp->t_flags&PENDIN) |
4147b3f6 | 1007 | ttypend(tp); |
875a1e2c | 1008 | splx(s); |
becb115c SL |
1009 | |
1010 | /* | |
1011 | * Hang process if it's in the background. | |
1012 | */ | |
4147b3f6 BJ |
1013 | while (tp == u.u_ttyp && u.u_procp->p_pgrp != tp->t_pgrp) { |
1014 | if (u.u_signal[SIGTTIN] == SIG_IGN || | |
1015 | u.u_signal[SIGTTIN] == SIG_HOLD || | |
1016 | /* | |
1017 | (u.u_procp->p_flag&SDETACH) || | |
1018 | */ | |
1019 | u.u_procp->p_flag&SVFORK) | |
840510a3 | 1020 | return (EIO); |
4147b3f6 BJ |
1021 | gsignal(u.u_procp->p_pgrp, SIGTTIN); |
1022 | sleep((caddr_t)&lbolt, TTIPRI); | |
1023 | } | |
becb115c SL |
1024 | t_flags = tp->t_flags; |
1025 | ||
1026 | /* | |
1027 | * In raw mode take characters directly from the | |
1028 | * raw queue w/o processing. Interlock against | |
1029 | * device interrupts when interrogating rawq. | |
1030 | */ | |
1031 | if (t_flags&RAW) { | |
875a1e2c | 1032 | s = spl5(); |
4147b3f6 | 1033 | if (tp->t_rawq.c_cc <= 0) { |
becb115c | 1034 | if ((tp->t_state&TS_CARR_ON) == 0 || |
4147b3f6 | 1035 | (tp->t_state&TS_NBIO)) { |
875a1e2c | 1036 | splx(s); |
becb115c | 1037 | return (0); |
4147b3f6 BJ |
1038 | } |
1039 | sleep((caddr_t)&tp->t_rawq, TTIPRI); | |
875a1e2c | 1040 | splx(s); |
4147b3f6 BJ |
1041 | goto loop; |
1042 | } | |
875a1e2c SL |
1043 | splx(s); |
1044 | while (!error && tp->t_rawq.c_cc && uio->uio_iovcnt) | |
840510a3 | 1045 | error = passuc(getc(&tp->t_rawq), uio); |
875a1e2c | 1046 | goto checktandem; |
becb115c SL |
1047 | } |
1048 | ||
1049 | /* | |
1050 | * In cbreak mode use the rawq, otherwise | |
1051 | * take characters from the canonicalized q. | |
1052 | */ | |
1053 | qp = t_flags&CBREAK ? &tp->t_rawq : &tp->t_canq; | |
1054 | ||
1055 | /* | |
1056 | * No input, sleep on rawq awaiting hardware | |
1057 | * receipt and notification. | |
1058 | */ | |
875a1e2c | 1059 | s = spl5(); |
becb115c SL |
1060 | if (qp->c_cc <= 0) { |
1061 | if ((tp->t_state&TS_CARR_ON) == 0 || | |
1062 | (tp->t_state&TS_NBIO)) { | |
875a1e2c | 1063 | splx(s); |
becb115c | 1064 | return (EWOULDBLOCK); |
4147b3f6 | 1065 | } |
becb115c | 1066 | sleep((caddr_t)&tp->t_rawq, TTIPRI); |
875a1e2c | 1067 | splx(s); |
becb115c SL |
1068 | goto loop; |
1069 | } | |
875a1e2c | 1070 | splx(s); |
becb115c SL |
1071 | |
1072 | /* | |
1073 | * Input present, perform input mapping | |
1074 | * and processing (we're not in raw mode). | |
1075 | */ | |
1076 | first = 1; | |
1077 | while ((c = getc(qp)) >= 0) { | |
1078 | if (t_flags&CRMOD && c == '\r') | |
1079 | c = '\n'; | |
1080 | /* | |
1081 | * Hack lower case simulation on | |
1082 | * upper case only terminals. | |
1083 | */ | |
1084 | if (t_flags&LCASE && c <= 0177) | |
1085 | if (tp->t_state&TS_BKSL) { | |
1086 | if (maptab[c]) | |
1087 | c = maptab[c]; | |
1088 | tp->t_state &= ~TS_BKSL; | |
1089 | } else if (c >= 'A' && c <= 'Z') | |
1090 | c += 'a' - 'A'; | |
1091 | else if (c == '\\') { | |
1092 | tp->t_state |= TS_BKSL; | |
1093 | continue; | |
4147b3f6 | 1094 | } |
becb115c SL |
1095 | /* |
1096 | * Check for delayed suspend character. | |
1097 | */ | |
1098 | if (tp->t_line == NTTYDISC && c == tp->t_dsuspc) { | |
1099 | gsignal(tp->t_pgrp, SIGTSTP); | |
1100 | if (first) { | |
1101 | sleep((caddr_t)&lbolt, TTIPRI); | |
1102 | goto loop; | |
1103 | } | |
1104 | break; | |
4147b3f6 | 1105 | } |
becb115c SL |
1106 | /* |
1107 | * Interpret EOF only in cooked mode. | |
1108 | */ | |
1109 | if (c == tp->t_eofc && (t_flags&CBREAK) == 0) | |
1110 | break; | |
1111 | /* | |
1112 | * Give user character. | |
1113 | */ | |
1114 | error = passuc(c & 0177, uio); | |
1115 | if (error) | |
1116 | break; | |
1117 | if (uio->uio_iovcnt == 0) | |
1118 | break; | |
1119 | /* | |
1120 | * In cooked mode check for a "break character" | |
1121 | * marking the end of a "line of input". | |
1122 | */ | |
1123 | if ((t_flags&CBREAK) == 0 && ttbreakc(c, tp)) | |
1124 | break; | |
1125 | first = 0; | |
4147b3f6 | 1126 | } |
becb115c SL |
1127 | tp->t_state &= ~TS_BKSL; |
1128 | ||
875a1e2c | 1129 | checktandem: |
becb115c SL |
1130 | /* |
1131 | * Look to unblock output now that (presumably) | |
1132 | * the input queue has gone down. | |
1133 | */ | |
875a1e2c | 1134 | if (tp->t_state&TS_TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) |
becb115c | 1135 | if (putc(tp->t_startc, &tp->t_outq) == 0) { |
4147b3f6 BJ |
1136 | tp->t_state &= ~TS_TBLOCK; |
1137 | ttstart(tp); | |
1138 | } | |
840510a3 | 1139 | return (error); |
4147b3f6 BJ |
1140 | } |
1141 | ||
1142 | /* | |
1143 | * Called from the device's write routine after it has | |
1144 | * calculated the tty-structure given as argument. | |
1145 | */ | |
913ea2d1 | 1146 | ttwrite(tp, uio) |
4b72e2f9 | 1147 | register struct tty *tp; |
becb115c | 1148 | register struct uio *uio; |
4147b3f6 | 1149 | { |
4147b3f6 | 1150 | register char *cp; |
becb115c SL |
1151 | register int cc, ce, c; |
1152 | int i, hiwat, cnt, error, s; | |
4147b3f6 | 1153 | char obuf[OBUFSIZ]; |
4147b3f6 | 1154 | |
becb115c | 1155 | if ((tp->t_state&TS_CARR_ON) == 0) |
840510a3 | 1156 | return (EIO); |
becb115c SL |
1157 | hiwat = TTHIWAT(tp); |
1158 | cnt = uio->uio_resid; | |
1159 | error = 0; | |
4147b3f6 | 1160 | loop: |
becb115c SL |
1161 | /* |
1162 | * Hang the process if it's in the background. | |
1163 | */ | |
4147b3f6 | 1164 | while (u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && |
becb115c | 1165 | (tp->t_flags&TOSTOP) && (u.u_procp->p_flag&SVFORK)==0 && |
4147b3f6 BJ |
1166 | u.u_signal[SIGTTOU] != SIG_IGN && |
1167 | u.u_signal[SIGTTOU] != SIG_HOLD | |
1168 | /* | |
1169 | && | |
1170 | (u.u_procp->p_flag&SDETACH)==0) { | |
1171 | */ | |
1172 | ) { | |
1173 | gsignal(u.u_procp->p_pgrp, SIGTTOU); | |
1174 | sleep((caddr_t)&lbolt, TTIPRI); | |
1175 | } | |
becb115c SL |
1176 | |
1177 | /* | |
1178 | * Process the user's data in at most OBUFSIZ | |
1179 | * chunks. Perform lower case simulation and | |
1180 | * similar hacks. Keep track of high water | |
1181 | * mark, sleep on overflow awaiting device aid | |
1182 | * in acquiring new space. | |
1183 | */ | |
913ea2d1 | 1184 | while (uio->uio_resid > 0) { |
becb115c SL |
1185 | /* |
1186 | * Grab a hunk of data from the user. | |
1187 | */ | |
913ea2d1 BJ |
1188 | cc = uio->uio_iov->iov_len; |
1189 | if (cc == 0) { | |
1190 | uio->uio_iovcnt--; | |
1191 | uio->uio_iov++; | |
1192 | if (uio->uio_iovcnt < 0) | |
1193 | panic("ttwrite"); | |
1194 | continue; | |
1195 | } | |
1196 | if (cc > OBUFSIZ) | |
1197 | cc = OBUFSIZ; | |
4147b3f6 | 1198 | cp = obuf; |
88a7a62a | 1199 | error = uiomove(cp, cc, UIO_WRITE, uio); |
840510a3 | 1200 | if (error) |
4147b3f6 BJ |
1201 | break; |
1202 | if (tp->t_outq.c_cc > hiwat) | |
1203 | goto ovhiwat; | |
becb115c | 1204 | if (tp->t_flags&FLUSHO) |
4147b3f6 | 1205 | continue; |
becb115c SL |
1206 | /* |
1207 | * If we're mapping lower case or kludging tildes, | |
1208 | * then we've got to look at each character, so | |
1209 | * just feed the stuff to ttyoutput... | |
1210 | */ | |
1211 | if (tp->t_flags & (LCASE|TILDE)) { | |
1212 | while (cc > 0) { | |
4147b3f6 BJ |
1213 | c = *cp++; |
1214 | tp->t_rocount = 0; | |
4b72e2f9 | 1215 | while ((c = ttyoutput(c, tp)) >= 0) { |
4147b3f6 BJ |
1216 | /* out of clists, wait a bit */ |
1217 | ttstart(tp); | |
1218 | sleep((caddr_t)&lbolt, TTOPRI); | |
1219 | tp->t_rocount = 0; | |
1220 | } | |
1221 | --cc; | |
1222 | if (tp->t_outq.c_cc > hiwat) | |
1223 | goto ovhiwat; | |
1224 | } | |
1225 | continue; | |
1226 | } | |
becb115c SL |
1227 | /* |
1228 | * If nothing fancy need be done, grab those characters we | |
1229 | * can handle without any of ttyoutput's processing and | |
1230 | * just transfer them to the output q. For those chars | |
1231 | * which require special processing (as indicated by the | |
1232 | * bits in partab), call ttyoutput. After processing | |
1233 | * a hunk of data, look for FLUSHO so ^O's will take effect | |
1234 | * immediately. | |
1235 | */ | |
1236 | while (cc > 0) { | |
1237 | if (tp->t_flags & (RAW|LITOUT)) | |
4147b3f6 BJ |
1238 | ce = cc; |
1239 | else { | |
88a7a62a SL |
1240 | ce = cc - scanc((unsigned)cc, (caddr_t)cp, |
1241 | (caddr_t)partab, 077); | |
becb115c SL |
1242 | /* |
1243 | * If ce is zero, then we're processing | |
1244 | * a special character through ttyoutput. | |
1245 | */ | |
1246 | if (ce == 0) { | |
4147b3f6 BJ |
1247 | tp->t_rocount = 0; |
1248 | if (ttyoutput(*cp, tp) >= 0) { | |
becb115c | 1249 | /* no c-lists, wait a bit */ |
4147b3f6 BJ |
1250 | ttstart(tp); |
1251 | sleep((caddr_t)&lbolt, TTOPRI); | |
1252 | continue; | |
1253 | } | |
becb115c SL |
1254 | cp++, cc--; |
1255 | if (tp->t_flags&FLUSHO || | |
1256 | tp->t_outq.c_cc > hiwat) | |
4147b3f6 | 1257 | goto ovhiwat; |
becb115c | 1258 | continue; |
4147b3f6 BJ |
1259 | } |
1260 | } | |
becb115c SL |
1261 | /* |
1262 | * A bunch of normal characters have been found, | |
1263 | * transfer them en masse to the output queue and | |
1264 | * continue processing at the top of the loop. | |
1265 | * If there are any further characters in this | |
1266 | * <= OBUFSIZ chunk, the first should be a character | |
1267 | * requiring special handling by ttyoutput. | |
1268 | */ | |
4147b3f6 | 1269 | tp->t_rocount = 0; |
becb115c SL |
1270 | i = b_to_q(cp, ce, &tp->t_outq); |
1271 | ce -= i; | |
1272 | tp->t_col += ce; | |
1273 | cp += ce, cc -= ce, tk_nout += ce; | |
1274 | if (i > 0) { | |
1275 | /* out of c-lists, wait a bit */ | |
4147b3f6 BJ |
1276 | ttstart(tp); |
1277 | sleep((caddr_t)&lbolt, TTOPRI); | |
1278 | } | |
becb115c | 1279 | if (tp->t_flags&FLUSHO || tp->t_outq.c_cc > hiwat) |
4147b3f6 BJ |
1280 | goto ovhiwat; |
1281 | } | |
1282 | } | |
1283 | ttstart(tp); | |
840510a3 | 1284 | return (error); |
4147b3f6 BJ |
1285 | |
1286 | ovhiwat: | |
becb115c SL |
1287 | s = spl5(); |
1288 | if (cc != 0) { | |
1289 | uio->uio_iov->iov_base -= cc; | |
1290 | uio->uio_iov->iov_len += cc; | |
1291 | uio->uio_resid += cc; | |
1292 | uio->uio_offset -= cc; | |
1293 | } | |
1294 | /* | |
1295 | * This can only occur if FLUSHO | |
1296 | * is also set in t_flags. | |
1297 | */ | |
4147b3f6 | 1298 | if (tp->t_outq.c_cc <= hiwat) { |
becb115c | 1299 | splx(s); |
4147b3f6 BJ |
1300 | goto loop; |
1301 | } | |
1302 | ttstart(tp); | |
becb115c | 1303 | if (tp->t_state&TS_NBIO) { |
913ea2d1 | 1304 | if (uio->uio_resid == cnt) |
840510a3 BJ |
1305 | return (EWOULDBLOCK); |
1306 | return (0); | |
4147b3f6 BJ |
1307 | } |
1308 | tp->t_state |= TS_ASLEEP; | |
1309 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
becb115c | 1310 | splx(s); |
4147b3f6 BJ |
1311 | goto loop; |
1312 | } | |
1313 | ||
1314 | /* | |
1315 | * Rubout one character from the rawq of tp | |
1316 | * as cleanly as possible. | |
1317 | */ | |
1318 | ttyrub(c, tp) | |
4b72e2f9 SL |
1319 | register c; |
1320 | register struct tty *tp; | |
4147b3f6 BJ |
1321 | { |
1322 | register char *cp; | |
1323 | register int savecol; | |
1324 | int s; | |
1325 | char *nextc(); | |
1326 | ||
becb115c | 1327 | if ((tp->t_flags&ECHO) == 0) |
4147b3f6 | 1328 | return; |
becb115c | 1329 | tp->t_flags &= ~FLUSHO; |
4147b3f6 | 1330 | c &= 0377; |
becb115c | 1331 | if (tp->t_flags&CRTBS) { |
4147b3f6 BJ |
1332 | if (tp->t_rocount == 0) { |
1333 | /* | |
1334 | * Screwed by ttwrite; retype | |
1335 | */ | |
1336 | ttyretype(tp); | |
1337 | return; | |
1338 | } | |
becb115c | 1339 | if (c == ('\t'|0200) || c == ('\n'|0200)) |
4147b3f6 | 1340 | ttyrubo(tp, 2); |
becb115c | 1341 | else switch (partab[c&=0177]&0177) { |
4147b3f6 BJ |
1342 | |
1343 | case ORDINARY: | |
1344 | if (tp->t_flags&LCASE && c >= 'A' && c <= 'Z') | |
1345 | ttyrubo(tp, 2); | |
1346 | else | |
1347 | ttyrubo(tp, 1); | |
1348 | break; | |
1349 | ||
1350 | case VTAB: | |
1351 | case BACKSPACE: | |
1352 | case CONTROL: | |
1353 | case RETURN: | |
becb115c | 1354 | if (tp->t_flags&CTLECH) |
4147b3f6 BJ |
1355 | ttyrubo(tp, 2); |
1356 | break; | |
1357 | ||
1358 | case TAB: | |
1359 | if (tp->t_rocount < tp->t_rawq.c_cc) { | |
1360 | ttyretype(tp); | |
1361 | return; | |
1362 | } | |
1363 | s = spl5(); | |
1364 | savecol = tp->t_col; | |
becb115c SL |
1365 | tp->t_state |= TS_CNTTB; |
1366 | tp->t_flags |= FLUSHO; | |
4147b3f6 | 1367 | tp->t_col = tp->t_rocol; |
becb115c SL |
1368 | cp = tp->t_rawq.c_cf; |
1369 | for (; cp; cp = nextc(&tp->t_rawq, cp)) | |
4147b3f6 | 1370 | ttyecho(*cp, tp); |
becb115c SL |
1371 | tp->t_flags &= ~FLUSHO; |
1372 | tp->t_state &= ~TS_CNTTB; | |
4147b3f6 BJ |
1373 | splx(s); |
1374 | /* | |
1375 | * savecol will now be length of the tab | |
1376 | */ | |
1377 | savecol -= tp->t_col; | |
1378 | tp->t_col += savecol; | |
1379 | if (savecol > 8) | |
1380 | savecol = 8; /* overflow screw */ | |
1381 | while (--savecol >= 0) | |
1382 | (void) ttyoutput('\b', tp); | |
1383 | break; | |
1384 | ||
1385 | default: | |
1386 | panic("ttyrub"); | |
1387 | } | |
becb115c SL |
1388 | } else if (tp->t_flags&PRTERA) { |
1389 | if ((tp->t_state&TS_ERASE) == 0) { | |
4147b3f6 | 1390 | (void) ttyoutput('\\', tp); |
becb115c | 1391 | tp->t_state |= TS_ERASE; |
4147b3f6 BJ |
1392 | } |
1393 | ttyecho(c, tp); | |
1394 | } else | |
1395 | ttyecho(tp->t_erase, tp); | |
1396 | tp->t_rocount--; | |
1397 | } | |
1398 | ||
1399 | /* | |
1400 | * Crt back over cnt chars perhaps | |
1401 | * erasing them. | |
1402 | */ | |
1403 | ttyrubo(tp, cnt) | |
4b72e2f9 SL |
1404 | register struct tty *tp; |
1405 | int cnt; | |
4147b3f6 | 1406 | { |
becb115c | 1407 | register char *rubostring = tp->t_flags&CRTERA ? "\b \b" : "\b"; |
4147b3f6 BJ |
1408 | |
1409 | while (--cnt >= 0) | |
becb115c | 1410 | ttyout(rubostring, tp); |
4147b3f6 BJ |
1411 | } |
1412 | ||
1413 | /* | |
1414 | * Reprint the rawq line. | |
1415 | * We assume c_cc has already been checked. | |
1416 | */ | |
1417 | ttyretype(tp) | |
4b72e2f9 | 1418 | register struct tty *tp; |
4147b3f6 BJ |
1419 | { |
1420 | register char *cp; | |
1421 | char *nextc(); | |
1422 | int s; | |
1423 | ||
becb115c SL |
1424 | if (tp->t_rprntc != 0377) |
1425 | ttyecho(tp->t_rprntc, tp); | |
4147b3f6 BJ |
1426 | (void) ttyoutput('\n', tp); |
1427 | s = spl5(); | |
1428 | for (cp = tp->t_canq.c_cf; cp; cp = nextc(&tp->t_canq, cp)) | |
1429 | ttyecho(*cp, tp); | |
1430 | for (cp = tp->t_rawq.c_cf; cp; cp = nextc(&tp->t_rawq, cp)) | |
1431 | ttyecho(*cp, tp); | |
becb115c | 1432 | tp->t_state &= ~TS_ERASE; |
4147b3f6 BJ |
1433 | splx(s); |
1434 | tp->t_rocount = tp->t_rawq.c_cc; | |
1435 | tp->t_rocol = 0; | |
1436 | } | |
1437 | ||
1438 | /* | |
1439 | * Echo a typed character to the terminal | |
1440 | */ | |
1441 | ttyecho(c, tp) | |
4b72e2f9 SL |
1442 | register c; |
1443 | register struct tty *tp; | |
4147b3f6 BJ |
1444 | { |
1445 | ||
becb115c SL |
1446 | if ((tp->t_state&TS_CNTTB) == 0) |
1447 | tp->t_flags &= ~FLUSHO; | |
4147b3f6 BJ |
1448 | if ((tp->t_flags&ECHO) == 0) |
1449 | return; | |
1450 | c &= 0377; | |
1451 | if (tp->t_flags&RAW) { | |
1452 | (void) ttyoutput(c, tp); | |
1453 | return; | |
1454 | } | |
1455 | if (c == '\r' && tp->t_flags&CRMOD) | |
1456 | c = '\n'; | |
becb115c | 1457 | if (tp->t_flags&CTLECH) { |
4147b3f6 BJ |
1458 | if ((c&0177) <= 037 && c!='\t' && c!='\n' || (c&0177)==0177) { |
1459 | (void) ttyoutput('^', tp); | |
1460 | c &= 0177; | |
1461 | if (c == 0177) | |
1462 | c = '?'; | |
1463 | else if (tp->t_flags&LCASE) | |
1464 | c += 'a' - 1; | |
1465 | else | |
1466 | c += 'A' - 1; | |
1467 | } | |
1468 | } | |
1469 | if ((tp->t_flags&LCASE) && (c >= 'A' && c <= 'Z')) | |
1470 | c += 'a' - 'A'; | |
becb115c | 1471 | (void) ttyoutput(c&0177, tp); |
4147b3f6 BJ |
1472 | } |
1473 | ||
1474 | /* | |
1475 | * Is c a break char for tp? | |
1476 | */ | |
1477 | ttbreakc(c, tp) | |
4b72e2f9 SL |
1478 | register c; |
1479 | register struct tty *tp; | |
4147b3f6 | 1480 | { |
becb115c | 1481 | return (c == '\n' || c == tp->t_eofc || c == tp->t_brkc || |
4147b3f6 BJ |
1482 | c == '\r' && (tp->t_flags&CRMOD)); |
1483 | } | |
1484 | ||
1485 | /* | |
1486 | * send string cp to tp | |
1487 | */ | |
1488 | ttyout(cp, tp) | |
4b72e2f9 SL |
1489 | register char *cp; |
1490 | register struct tty *tp; | |
4147b3f6 BJ |
1491 | { |
1492 | register char c; | |
1493 | ||
1494 | while (c = *cp++) | |
1495 | (void) ttyoutput(c, tp); | |
1496 | } | |
1497 | ||
1498 | ttwakeup(tp) | |
1499 | struct tty *tp; | |
1500 | { | |
1501 | ||
1502 | if (tp->t_rsel) { | |
1503 | selwakeup(tp->t_rsel, tp->t_state&TS_RCOLL); | |
1504 | tp->t_state &= ~TS_RCOLL; | |
1505 | tp->t_rsel = 0; | |
1506 | } | |
88a7a62a SL |
1507 | if (tp->t_state & TS_ASYNC) |
1508 | gsignal(tp->t_pgrp, SIGIO); | |
4147b3f6 BJ |
1509 | wakeup((caddr_t)&tp->t_rawq); |
1510 | } | |
1511 | ||
7c9f96c0 | 1512 | #if !defined(vax) && !defined(sun) |
becb115c SL |
1513 | scanc(size, cp, table, mask) |
1514 | register int size; | |
1515 | register char *cp, table[]; | |
1516 | register int mask; | |
4147b3f6 | 1517 | { |
becb115c | 1518 | register int i = 0; |
4147b3f6 | 1519 | |
becb115c SL |
1520 | while ((table[*(u_char *)(cp + i)]&mask) == 0 && i < size) |
1521 | i++; | |
1522 | return (i); | |
4147b3f6 | 1523 | } |
becb115c | 1524 | #endif |