Commit | Line | Data |
---|---|---|
88a7a62a | 1 | /* tty.c 4.41 83/05/27 */ |
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: | |
67ba7f0d SL |
252 | case TIOCBIS: |
253 | case TIOCBIC: | |
254 | case TIOCSET: | |
8203fe05 | 255 | case TIOCSTI: |
50e2732b BJ |
256 | while (tp->t_line == NTTYDISC && |
257 | u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && | |
258 | (u.u_procp->p_flag&SVFORK) == 0 && | |
259 | u.u_signal[SIGTTOU] != SIG_IGN && | |
fc6972ae | 260 | u.u_signal[SIGTTOU] != SIG_HOLD) { |
50e2732b BJ |
261 | gsignal(u.u_procp->p_pgrp, SIGTTOU); |
262 | sleep((caddr_t)&lbolt, TTOPRI); | |
263 | } | |
264 | break; | |
265 | } | |
266 | ||
becb115c SL |
267 | /* |
268 | * Process the ioctl. | |
269 | */ | |
4b72e2f9 | 270 | switch (com) { |
89dc6dfb | 271 | |
fc6972ae | 272 | /* get discipline number */ |
89dc6dfb | 273 | case TIOCGETD: |
4b72e2f9 | 274 | *(int *)data = tp->t_line; |
89dc6dfb BJ |
275 | break; |
276 | ||
fc6972ae | 277 | /* set line discipline */ |
4b72e2f9 SL |
278 | case TIOCSETD: { |
279 | register int t = *(int *)data; | |
becb115c | 280 | int error = 0; |
4b72e2f9 | 281 | |
4a003df3 SL |
282 | if (t >= nldisp) |
283 | return (ENXIO); | |
fc6972ae | 284 | s = spl5(); |
89dc6dfb BJ |
285 | if (tp->t_line) |
286 | (*linesw[tp->t_line].l_close)(tp); | |
287 | if (t) | |
fc6972ae BJ |
288 | error = (*linesw[t].l_open)(dev, tp); |
289 | splx(s); | |
4a003df3 SL |
290 | if (error) { |
291 | s = spl5(); | |
292 | if (tp->t_line) | |
293 | (void) (*linesw[tp->t_line].l_open)(dev, tp); | |
294 | splx(s); | |
fc6972ae | 295 | return (error); |
4a003df3 | 296 | } |
fc6972ae | 297 | tp->t_line = t; |
89dc6dfb | 298 | break; |
4b72e2f9 | 299 | } |
89dc6dfb | 300 | |
fc6972ae | 301 | /* prevent more opens on channel */ |
152c2598 BJ |
302 | case TIOCEXCL: |
303 | tp->t_state |= TS_XCLUDE; | |
304 | break; | |
305 | ||
306 | case TIOCNXCL: | |
307 | tp->t_state &= ~TS_XCLUDE; | |
308 | break; | |
309 | ||
89dc6dfb | 310 | |
67ba7f0d | 311 | case TIOCGET: |
88a7a62a | 312 | *(int *)data = tp->t_flags; |
67ba7f0d SL |
313 | break; |
314 | ||
315 | case TIOCCGET: | |
316 | bcopy((caddr_t)&tp->t_chars, data, sizeof (struct ttychars)); | |
317 | break; | |
318 | ||
319 | case TIOCCSET: | |
320 | bcopy(data, (caddr_t)&tp->t_chars, sizeof (struct ttychars)); | |
321 | break; | |
322 | ||
fc6972ae | 323 | /* hang up line on last close */ |
89dc6dfb | 324 | case TIOCHPCL: |
941944c9 | 325 | tp->t_state |= TS_HUPCLS; |
89dc6dfb BJ |
326 | break; |
327 | ||
7d973a4d | 328 | case TIOCFLUSH: { |
4b72e2f9 SL |
329 | register int flags = *(int *)data; |
330 | ||
331 | if (flags == 0) | |
7d973a4d | 332 | flags = FREAD|FWRITE; |
4b72e2f9 SL |
333 | else |
334 | flags &= FREAD|FWRITE; | |
88a7a62a | 335 | ttyflush(tp, flags); |
89dc6dfb | 336 | break; |
4568c08e | 337 | } |
89dc6dfb | 338 | |
fc6972ae | 339 | /* return number of characters immediately available */ |
4b72e2f9 SL |
340 | case FIONREAD: |
341 | *(off_t *)data = ttnread(tp); | |
8062c8a7 | 342 | break; |
8062c8a7 | 343 | |
a8d3bf7f BJ |
344 | case TIOCSTOP: |
345 | s = spl5(); | |
becb115c | 346 | if ((tp->t_state&TS_TTSTOP) == 0) { |
bfcf09ee BJ |
347 | tp->t_state |= TS_TTSTOP; |
348 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
349 | } | |
4b72e2f9 | 350 | splx(s); |
bfcf09ee BJ |
351 | break; |
352 | ||
a8d3bf7f BJ |
353 | case TIOCSTART: |
354 | s = spl5(); | |
becb115c | 355 | if ((tp->t_state&TS_TTSTOP) || (tp->t_flags&FLUSHO)) { |
bfcf09ee | 356 | tp->t_state &= ~TS_TTSTOP; |
becb115c | 357 | tp->t_flags &= ~FLUSHO; |
bfcf09ee BJ |
358 | ttstart(tp); |
359 | } | |
4b72e2f9 | 360 | splx(s); |
bfcf09ee BJ |
361 | break; |
362 | ||
8203fe05 SL |
363 | /* |
364 | * Simulate typing of a character at the terminal. | |
365 | */ | |
366 | case TIOCSTI: | |
367 | if (u.u_uid && u.u_ttyp != tp) | |
368 | return (EACCES); | |
becb115c | 369 | (*linesw[tp->t_line].l_rint)(*(char *)data, tp); |
8203fe05 SL |
370 | break; |
371 | ||
88a7a62a SL |
372 | case TIOCSET: |
373 | case TIOCBIS: | |
374 | case TIOCBIC: | |
375 | newflags = *(int *)data; | |
376 | if (com == TIOCBIS) | |
377 | newflags |= tp->t_flags; | |
378 | else if (com == TIOCBIC) | |
379 | newflags = tp->t_flags &~ newflags; | |
380 | goto setin; | |
381 | ||
382 | case TIOCSETP: | |
383 | case TIOCSETN: { | |
384 | register struct sgttyb *sg = (struct sgttyb *)data; | |
385 | ||
386 | tp->t_erase = sg->sg_erase; | |
387 | tp->t_kill = sg->sg_kill; | |
388 | tp->t_ispeed = sg->sg_ispeed; | |
389 | tp->t_ospeed = sg->sg_ospeed; | |
390 | newflags = (tp->t_flags&0xffff0000) | (sg->sg_flags&0xffff); | |
391 | setin: | |
392 | s = spl5(); | |
393 | if (tp->t_flags&RAW || newflags&RAW || com == TIOCSETP) { | |
394 | ttywait(tp); | |
395 | ttyflush(tp, FREAD); | |
396 | } else if ((tp->t_flags&CBREAK) != (newflags&CBREAK)) { | |
397 | if (newflags&CBREAK) { | |
398 | struct clist tq; | |
399 | ||
400 | catq(&tp->t_rawq, &tp->t_canq); | |
401 | tq = tp->t_rawq; | |
402 | tp->t_rawq = tp->t_canq; | |
403 | tp->t_canq = tq; | |
404 | } else { | |
405 | tp->t_flags |= PENDIN; | |
406 | ttwakeup(tp); | |
407 | } | |
408 | } | |
409 | tp->t_flags = newflags; | |
410 | if (tp->t_flags&RAW) { | |
411 | tp->t_state &= ~TS_TTSTOP; | |
412 | ttstart(tp); | |
413 | } | |
414 | splx(s); | |
415 | break; | |
416 | } | |
417 | ||
418 | /* send current parameters to user */ | |
419 | case TIOCGETP: { | |
420 | register struct sgttyb *sg = (struct sgttyb *)data; | |
421 | ||
422 | sg->sg_ispeed = tp->t_ispeed; | |
423 | sg->sg_ospeed = tp->t_ospeed; | |
424 | sg->sg_erase = tp->t_erase; | |
425 | sg->sg_kill = tp->t_kill; | |
426 | sg->sg_flags = tp->t_flags; | |
427 | break; | |
428 | } | |
429 | ||
430 | case FIONBIO: | |
431 | if (*(int *)data) | |
432 | tp->t_state |= TS_NBIO; | |
433 | else | |
434 | tp->t_state &= ~TS_NBIO; | |
435 | break; | |
436 | ||
437 | case FIOASYNC: | |
438 | if (*(int *)data) | |
439 | tp->t_state |= TS_ASYNC; | |
440 | else | |
441 | tp->t_state &= ~TS_ASYNC; | |
442 | break; | |
443 | ||
444 | /* set/get local special characters */ | |
445 | case TIOCSLTC: | |
446 | bcopy(data, (caddr_t)&tp->t_suspc, sizeof (struct ltchars)); | |
447 | break; | |
448 | ||
449 | case TIOCGLTC: | |
450 | bcopy((caddr_t)&tp->t_suspc, data, sizeof (struct ltchars)); | |
451 | break; | |
452 | ||
453 | /* | |
454 | * Modify local mode word. | |
455 | */ | |
456 | case TIOCLBIS: | |
457 | tp->t_flags |= *(int *)data << 16; | |
458 | break; | |
459 | ||
460 | case TIOCLBIC: | |
461 | tp->t_flags &= ~(*(int *)data << 16); | |
462 | break; | |
463 | ||
464 | case TIOCLSET: | |
465 | tp->t_flags &= 0xffff; | |
466 | tp->t_flags |= *(int *)data << 16; | |
467 | break; | |
468 | ||
469 | case TIOCLGET: | |
470 | *(int *)data = tp->t_flags >> 16; | |
471 | break; | |
472 | ||
473 | /* should allow SPGRP and GPGRP only if tty open for reading */ | |
474 | case TIOCSPGRP: | |
475 | tp->t_pgrp = *(int *)data; | |
476 | break; | |
477 | ||
478 | case TIOCGPGRP: | |
479 | *(int *)data = tp->t_pgrp; | |
480 | break; | |
481 | ||
89dc6dfb | 482 | default: |
fc6972ae | 483 | return (-1); |
89dc6dfb | 484 | } |
fc6972ae | 485 | return (0); |
89dc6dfb | 486 | } |
e1d74936 BJ |
487 | |
488 | ttnread(tp) | |
489 | struct tty *tp; | |
490 | { | |
491 | int nread = 0; | |
492 | ||
becb115c | 493 | if (tp->t_flags & PENDIN) |
e1d74936 BJ |
494 | ttypend(tp); |
495 | nread = tp->t_canq.c_cc; | |
496 | if (tp->t_flags & (RAW|CBREAK)) | |
497 | nread += tp->t_rawq.c_cc; | |
498 | return (nread); | |
499 | } | |
500 | ||
941944c9 | 501 | ttselect(dev, rw) |
e1d74936 | 502 | dev_t dev; |
941944c9 | 503 | int rw; |
e1d74936 BJ |
504 | { |
505 | register struct tty *tp = &cdevsw[major(dev)].d_ttys[minor(dev)]; | |
506 | int nread; | |
941944c9 | 507 | int s = spl5(); |
e1d74936 | 508 | |
941944c9 | 509 | switch (rw) { |
e1d74936 BJ |
510 | |
511 | case FREAD: | |
512 | nread = ttnread(tp); | |
513 | if (nread > 0) | |
941944c9 | 514 | goto win; |
89b8a44c | 515 | if (tp->t_rsel && tp->t_rsel->p_wchan == (caddr_t)&selwait) |
941944c9 | 516 | tp->t_state |= TS_RCOLL; |
e1d74936 BJ |
517 | else |
518 | tp->t_rsel = u.u_procp; | |
941944c9 | 519 | break; |
e1d74936 | 520 | |
941944c9 BJ |
521 | case FWRITE: |
522 | if (tp->t_outq.c_cc <= TTLOWAT(tp)) | |
523 | goto win; | |
941944c9 BJ |
524 | if (tp->t_wsel && tp->t_wsel->p_wchan == (caddr_t)&selwait) |
525 | tp->t_state |= TS_WCOLL; | |
526 | else | |
527 | tp->t_wsel = u.u_procp; | |
528 | break; | |
e1d74936 | 529 | } |
941944c9 BJ |
530 | splx(s); |
531 | return (0); | |
532 | win: | |
533 | splx(s); | |
534 | return (1); | |
e1d74936 | 535 | } |
8bba2b8f | 536 | |
4147b3f6 | 537 | /* |
becb115c | 538 | * Establish a process group for distribution of |
4147b3f6 | 539 | * quits and interrupts from the tty. |
4147b3f6 BJ |
540 | */ |
541 | ttyopen(dev, tp) | |
4b72e2f9 SL |
542 | dev_t dev; |
543 | register struct tty *tp; | |
4147b3f6 BJ |
544 | { |
545 | register struct proc *pp; | |
546 | ||
547 | pp = u.u_procp; | |
548 | tp->t_dev = dev; | |
4b72e2f9 | 549 | if (pp->p_pgrp == 0) { |
4147b3f6 BJ |
550 | u.u_ttyp = tp; |
551 | u.u_ttyd = dev; | |
552 | if (tp->t_pgrp == 0) | |
553 | tp->t_pgrp = pp->p_pid; | |
554 | pp->p_pgrp = tp->t_pgrp; | |
555 | } | |
556 | tp->t_state &= ~TS_WOPEN; | |
557 | tp->t_state |= TS_ISOPEN; | |
558 | if (tp->t_line != NTTYDISC) | |
88a7a62a | 559 | ttywflush(tp); |
fc6972ae | 560 | return (0); |
4147b3f6 BJ |
561 | } |
562 | ||
563 | /* | |
564 | * clean tp on last close | |
565 | */ | |
566 | ttyclose(tp) | |
4b72e2f9 | 567 | register struct tty *tp; |
4147b3f6 BJ |
568 | { |
569 | ||
570 | if (tp->t_line) { | |
88a7a62a | 571 | ttywflush(tp); |
4147b3f6 BJ |
572 | tp->t_line = 0; |
573 | return; | |
574 | } | |
575 | tp->t_pgrp = 0; | |
88a7a62a | 576 | ttywflush(tp); |
4147b3f6 BJ |
577 | tp->t_state = 0; |
578 | } | |
579 | ||
580 | /* | |
581 | * reinput pending characters after state switch | |
582 | * call at spl5(). | |
583 | */ | |
584 | ttypend(tp) | |
4b72e2f9 | 585 | register struct tty *tp; |
4147b3f6 BJ |
586 | { |
587 | struct clist tq; | |
588 | register c; | |
589 | ||
becb115c SL |
590 | tp->t_flags &= ~PENDIN; |
591 | tp->t_state |= TS_TYPEN; | |
4147b3f6 BJ |
592 | tq = tp->t_rawq; |
593 | tp->t_rawq.c_cc = 0; | |
594 | tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0; | |
595 | while ((c = getc(&tq)) >= 0) | |
596 | ttyinput(c, tp); | |
becb115c | 597 | tp->t_state &= ~TS_TYPEN; |
4147b3f6 BJ |
598 | } |
599 | ||
600 | /* | |
becb115c SL |
601 | * Place a character on raw TTY input queue, |
602 | * putting in delimiters and waking up top | |
603 | * half as needed. Also echo if required. | |
604 | * The arguments are the character and the | |
605 | * appropriate tty structure. | |
4147b3f6 BJ |
606 | */ |
607 | ttyinput(c, tp) | |
4b72e2f9 SL |
608 | register c; |
609 | register struct tty *tp; | |
4147b3f6 | 610 | { |
becb115c | 611 | register int t_flags = tp->t_flags; |
4147b3f6 BJ |
612 | int i; |
613 | ||
becb115c SL |
614 | /* |
615 | * If input is pending take it first. | |
616 | */ | |
617 | if (t_flags&PENDIN) | |
4147b3f6 BJ |
618 | ttypend(tp); |
619 | tk_nin++; | |
620 | c &= 0377; | |
becb115c SL |
621 | |
622 | /* | |
623 | * In tandem mode, check high water mark. | |
624 | */ | |
4147b3f6 BJ |
625 | if (t_flags&TANDEM) |
626 | ttyblock(tp); | |
becb115c SL |
627 | |
628 | if (t_flags&RAW) { | |
629 | /* | |
630 | * Raw mode, just put character | |
631 | * in input q w/o interpretation. | |
632 | */ | |
633 | if (tp->t_rawq.c_cc > TTYHOG) | |
88a7a62a | 634 | ttyflush(tp, FREAD|FWRITE); |
becb115c SL |
635 | else { |
636 | if (putc(c, &tp->t_rawq) >= 0) | |
637 | ttwakeup(tp); | |
638 | ttyecho(c, tp); | |
4147b3f6 | 639 | } |
becb115c SL |
640 | goto endcase; |
641 | } | |
642 | ||
643 | /* | |
644 | * Ignore any high bit added during | |
645 | * previous ttyinput processing. | |
646 | */ | |
647 | if ((tp->t_state&TS_TYPEN) == 0) | |
648 | c &= 0177; | |
649 | /* | |
650 | * Check for literal nexting very first | |
651 | */ | |
652 | if (tp->t_state&TS_LNCH) { | |
653 | c |= 0200; | |
654 | tp->t_state &= ~TS_LNCH; | |
655 | } | |
656 | ||
657 | /* | |
658 | * Scan for special characters. This code | |
659 | * is really just a big case statement with | |
660 | * non-constant cases. The bottom of the | |
661 | * case statement is labeled ``endcase'', so goto | |
662 | * it after a case match, or similar. | |
663 | */ | |
664 | if (tp->t_line == NTTYDISC) { | |
665 | if (c == tp->t_lnextc) { | |
4147b3f6 BJ |
666 | if (tp->t_flags&ECHO) |
667 | ttyout("^\b", tp); | |
becb115c SL |
668 | tp->t_state |= TS_LNCH; |
669 | goto endcase; | |
670 | } | |
671 | if (c == tp->t_flushc) { | |
672 | if (tp->t_flags&FLUSHO) | |
673 | tp->t_flags &= ~FLUSHO; | |
4147b3f6 | 674 | else { |
88a7a62a | 675 | ttyflush(tp, FWRITE); |
4147b3f6 | 676 | ttyecho(c, tp); |
becb115c | 677 | if (tp->t_rawq.c_cc + tp->t_canq.c_cc) |
4147b3f6 | 678 | ttyretype(tp); |
becb115c | 679 | tp->t_flags |= FLUSHO; |
4147b3f6 | 680 | } |
becb115c SL |
681 | goto startoutput; |
682 | } | |
683 | if (c == tp->t_suspc) { | |
684 | if ((tp->t_flags&NOFLSH) == 0) | |
88a7a62a | 685 | ttyflush(tp, FREAD); |
4147b3f6 | 686 | ttyecho(c, tp); |
becb115c SL |
687 | gsignal(tp->t_pgrp, SIGTSTP); |
688 | goto endcase; | |
689 | } | |
690 | } | |
691 | ||
692 | /* | |
693 | * Handle start/stop characters. | |
694 | */ | |
695 | if (c == tp->t_stopc) { | |
696 | if ((tp->t_state&TS_TTSTOP) == 0) { | |
697 | tp->t_state |= TS_TTSTOP; | |
698 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
699 | return; | |
700 | } | |
701 | if (c != tp->t_startc) | |
702 | return; | |
703 | goto endcase; | |
704 | } | |
705 | if (c == tp->t_startc) | |
706 | goto restartoutput; | |
707 | ||
708 | /* | |
709 | * Look for interrupt/quit chars. | |
710 | */ | |
711 | if (c == tp->t_intrc || c == tp->t_quitc) { | |
712 | if ((tp->t_flags&NOFLSH) == 0) | |
88a7a62a | 713 | ttyflush(tp, FREAD|FWRITE); |
becb115c SL |
714 | ttyecho(c, tp); |
715 | gsignal(tp->t_pgrp, c == tp->t_intrc ? SIGINT : SIGQUIT); | |
716 | goto endcase; | |
717 | } | |
718 | ||
719 | /* | |
720 | * Cbreak mode, don't process line editing | |
721 | * characters; check high water mark for wakeup. | |
722 | */ | |
723 | if (t_flags&CBREAK) { | |
724 | if (tp->t_rawq.c_cc > TTYHOG) { | |
4147b3f6 BJ |
725 | if (tp->t_outq.c_cc < TTHIWAT(tp) && |
726 | tp->t_line == NTTYDISC) | |
727 | (void) ttyoutput(CTRL(g), tp); | |
728 | } else if (putc(c, &tp->t_rawq) >= 0) { | |
729 | ttwakeup(tp); | |
730 | ttyecho(c, tp); | |
731 | } | |
becb115c SL |
732 | goto endcase; |
733 | } | |
734 | ||
735 | /* | |
736 | * From here on down cooked mode character | |
737 | * processing takes place. | |
738 | */ | |
739 | if ((tp->t_state&TS_QUOT) && | |
740 | (c == tp->t_erase || c == tp->t_kill)) { | |
741 | ttyrub(unputc(&tp->t_rawq), tp); | |
742 | c |= 0200; | |
743 | } | |
744 | if (c == tp->t_erase) { | |
745 | if (tp->t_rawq.c_cc) | |
746 | ttyrub(unputc(&tp->t_rawq), tp); | |
747 | goto endcase; | |
748 | } | |
749 | if (c == tp->t_kill) { | |
750 | if (tp->t_flags&CRTKIL && | |
751 | tp->t_rawq.c_cc == tp->t_rocount) { | |
752 | while (tp->t_rawq.c_cc) | |
753 | ttyrub(unputc(&tp->t_rawq), tp); | |
754 | } else { | |
755 | ttyecho(c, tp); | |
756 | ttyecho('\n', tp); | |
757 | while (getc(&tp->t_rawq) > 0) | |
758 | ; | |
759 | tp->t_rocount = 0; | |
760 | } | |
761 | tp->t_state &= ~TS_LOCAL; | |
762 | goto endcase; | |
763 | } | |
764 | ||
765 | /* | |
766 | * New line discipline, | |
767 | * check word erase/reprint line. | |
768 | */ | |
769 | if (tp->t_line == NTTYDISC) { | |
770 | if (c == tp->t_werasc) { | |
771 | if (tp->t_rawq.c_cc == 0) | |
772 | goto endcase; | |
773 | do { | |
774 | c = unputc(&tp->t_rawq); | |
775 | if (c != ' ' && c != '\t') | |
776 | goto erasenb; | |
777 | ttyrub(c, tp); | |
778 | } while (tp->t_rawq.c_cc); | |
779 | goto endcase; | |
780 | erasenb: | |
781 | do { | |
782 | ttyrub(c, tp); | |
783 | if (tp->t_rawq.c_cc == 0) | |
784 | goto endcase; | |
785 | c = unputc(&tp->t_rawq); | |
786 | } while (c != ' ' && c != '\t'); | |
787 | (void) putc(c, &tp->t_rawq); | |
788 | goto endcase; | |
789 | } | |
790 | if (c == tp->t_rprntc) { | |
791 | ttyretype(tp); | |
792 | goto endcase; | |
793 | } | |
794 | } | |
795 | ||
796 | /* | |
797 | * Check for input buffer overflow | |
798 | */ | |
7c9f96c0 SL |
799 | if (tp->t_rawq.c_cc+tp->t_canq.c_cc >= TTYHOG) { |
800 | if (tp->t_line == NTTYDISC) | |
801 | (void) ttyoutput(CTRL(g), tp); | |
becb115c | 802 | goto endcase; |
7c9f96c0 | 803 | } |
becb115c SL |
804 | |
805 | /* | |
806 | * Put data char in q for user and | |
807 | * wakeup on seeing a line delimiter. | |
808 | */ | |
809 | if (putc(c, &tp->t_rawq) >= 0) { | |
becb115c SL |
810 | if (ttbreakc(c, tp)) { |
811 | tp->t_rocount = 0; | |
812 | catq(&tp->t_rawq, &tp->t_canq); | |
4147b3f6 | 813 | ttwakeup(tp); |
becb115c SL |
814 | } else if (tp->t_rocount++ == 0) |
815 | tp->t_rocol = tp->t_col; | |
816 | tp->t_state &= ~TS_QUOT; | |
817 | if (c == '\\') | |
818 | tp->t_state |= TS_QUOT; | |
819 | if (tp->t_state&TS_ERASE) { | |
820 | tp->t_state &= ~TS_ERASE; | |
821 | (void) ttyoutput('/', tp); | |
822 | } | |
823 | i = tp->t_col; | |
4147b3f6 | 824 | ttyecho(c, tp); |
becb115c SL |
825 | if (c == tp->t_eofc && tp->t_flags&ECHO) { |
826 | i = MIN(2, tp->t_col - i); | |
827 | while (i > 0) { | |
828 | (void) ttyoutput('\b', tp); | |
829 | i--; | |
830 | } | |
831 | } | |
4147b3f6 | 832 | } |
becb115c SL |
833 | |
834 | endcase: | |
835 | /* | |
836 | * If DEC-style start/stop is enabled don't restart | |
837 | * output until seeing the start character. | |
838 | */ | |
839 | if (tp->t_flags&DECCTQ && tp->t_state&TS_TTSTOP && | |
840 | tp->t_startc != tp->t_stopc) | |
4147b3f6 | 841 | return; |
becb115c SL |
842 | |
843 | restartoutput: | |
4147b3f6 | 844 | tp->t_state &= ~TS_TTSTOP; |
becb115c SL |
845 | tp->t_flags &= ~FLUSHO; |
846 | ||
847 | startoutput: | |
4147b3f6 BJ |
848 | ttstart(tp); |
849 | } | |
850 | ||
851 | /* | |
becb115c | 852 | * Put character on TTY output queue, adding delays, |
4147b3f6 | 853 | * expanding tabs, and handling the CR/NL bit. |
becb115c SL |
854 | * This is called both from the top half for output, |
855 | * and from interrupt level for echoing. | |
4147b3f6 BJ |
856 | * The arguments are the character and the tty structure. |
857 | * Returns < 0 if putc succeeds, otherwise returns char to resend | |
858 | * Must be recursive. | |
859 | */ | |
860 | ttyoutput(c, tp) | |
861 | register c; | |
862 | register struct tty *tp; | |
863 | { | |
864 | register char *colp; | |
865 | register ctype; | |
866 | ||
becb115c SL |
867 | if (tp->t_flags & (RAW|LITOUT)) { |
868 | if (tp->t_flags&FLUSHO) | |
4147b3f6 BJ |
869 | return (-1); |
870 | if (putc(c, &tp->t_outq)) | |
4b72e2f9 | 871 | return (c); |
4147b3f6 BJ |
872 | tk_nout++; |
873 | return (-1); | |
874 | } | |
becb115c | 875 | |
4147b3f6 | 876 | /* |
becb115c SL |
877 | * Ignore EOT in normal mode to avoid |
878 | * hanging up certain terminals. | |
4147b3f6 BJ |
879 | */ |
880 | c &= 0177; | |
becb115c | 881 | if (c == CEOT && (tp->t_flags&CBREAK) == 0) |
4147b3f6 BJ |
882 | return (-1); |
883 | /* | |
884 | * Turn tabs to spaces as required | |
885 | */ | |
becb115c | 886 | if (c == '\t' && (tp->t_flags&TBDELAY) == XTABS) { |
4147b3f6 BJ |
887 | register int s; |
888 | ||
889 | c = 8 - (tp->t_col&7); | |
becb115c | 890 | if ((tp->t_flags&FLUSHO) == 0) { |
4147b3f6 BJ |
891 | s = spl5(); /* don't interrupt tabs */ |
892 | c -= b_to_q(" ", c, &tp->t_outq); | |
893 | tk_nout += c; | |
894 | splx(s); | |
895 | } | |
896 | tp->t_col += c; | |
897 | return (c ? -1 : '\t'); | |
898 | } | |
899 | tk_nout++; | |
900 | /* | |
901 | * for upper-case-only terminals, | |
902 | * generate escapes. | |
903 | */ | |
904 | if (tp->t_flags&LCASE) { | |
905 | colp = "({)}!|^~'`"; | |
4b72e2f9 SL |
906 | while (*colp++) |
907 | if (c == *colp++) { | |
4147b3f6 BJ |
908 | if (ttyoutput('\\', tp) >= 0) |
909 | return (c); | |
910 | c = colp[-2]; | |
911 | break; | |
912 | } | |
becb115c | 913 | if ('A' <= c && c <= 'Z') { |
4147b3f6 BJ |
914 | if (ttyoutput('\\', tp) >= 0) |
915 | return (c); | |
becb115c | 916 | } else if ('a' <= c && c <= 'z') |
4147b3f6 BJ |
917 | c += 'A' - 'a'; |
918 | } | |
becb115c | 919 | |
4147b3f6 BJ |
920 | /* |
921 | * turn <nl> to <cr><lf> if desired. | |
922 | */ | |
becb115c | 923 | if (c == '\n' && tp->t_flags&CRMOD) |
4147b3f6 BJ |
924 | if (ttyoutput('\r', tp) >= 0) |
925 | return (c); | |
becb115c | 926 | if (c == '~' && tp->t_flags&TILDE) |
4147b3f6 | 927 | c = '`'; |
becb115c | 928 | if ((tp->t_flags&FLUSHO) == 0 && putc(c, &tp->t_outq)) |
4147b3f6 BJ |
929 | return (c); |
930 | /* | |
931 | * Calculate delays. | |
932 | * The numbers here represent clock ticks | |
933 | * and are not necessarily optimal for all terminals. | |
934 | * The delays are indicated by characters above 0200. | |
935 | * In raw mode there are no delays and the | |
936 | * transmission path is 8 bits wide. | |
becb115c SL |
937 | * |
938 | * SHOULD JUST ALLOW USER TO SPECIFY DELAYS | |
4147b3f6 BJ |
939 | */ |
940 | colp = &tp->t_col; | |
941 | ctype = partab[c]; | |
942 | c = 0; | |
943 | switch (ctype&077) { | |
944 | ||
945 | case ORDINARY: | |
946 | (*colp)++; | |
947 | ||
948 | case CONTROL: | |
949 | break; | |
950 | ||
951 | case BACKSPACE: | |
952 | if (*colp) | |
953 | (*colp)--; | |
954 | break; | |
955 | ||
956 | case NEWLINE: | |
957 | ctype = (tp->t_flags >> 8) & 03; | |
4b72e2f9 | 958 | if (ctype == 1) { /* tty 37 */ |
88a7a62a | 959 | if (*colp > 0) |
4147b3f6 | 960 | c = max(((unsigned)*colp>>4) + 3, (unsigned)6); |
becb115c | 961 | } else if (ctype == 2) /* vt05 */ |
4147b3f6 | 962 | c = 6; |
4147b3f6 BJ |
963 | *colp = 0; |
964 | break; | |
965 | ||
966 | case TAB: | |
967 | ctype = (tp->t_flags >> 10) & 03; | |
4b72e2f9 | 968 | if (ctype == 1) { /* tty 37 */ |
4147b3f6 | 969 | c = 1 - (*colp | ~07); |
4b72e2f9 | 970 | if (c < 5) |
4147b3f6 BJ |
971 | c = 0; |
972 | } | |
973 | *colp |= 07; | |
974 | (*colp)++; | |
975 | break; | |
976 | ||
977 | case VTAB: | |
becb115c | 978 | if (tp->t_flags&VTDELAY) /* tty 37 */ |
4147b3f6 BJ |
979 | c = 0177; |
980 | break; | |
981 | ||
982 | case RETURN: | |
983 | ctype = (tp->t_flags >> 12) & 03; | |
becb115c | 984 | if (ctype == 1) /* tn 300 */ |
4147b3f6 | 985 | c = 5; |
becb115c | 986 | else if (ctype == 2) /* ti 700 */ |
4147b3f6 | 987 | c = 10; |
becb115c | 988 | else if (ctype == 3) { /* concept 100 */ |
4147b3f6 | 989 | int i; |
becb115c | 990 | |
4147b3f6 | 991 | if ((i = *colp) >= 0) |
becb115c | 992 | for (; i < 9; i++) |
4147b3f6 BJ |
993 | (void) putc(0177, &tp->t_outq); |
994 | } | |
995 | *colp = 0; | |
996 | } | |
becb115c | 997 | if (c && (tp->t_flags&FLUSHO) == 0) |
4147b3f6 BJ |
998 | (void) putc(c|0200, &tp->t_outq); |
999 | return (-1); | |
1000 | } | |
1001 | ||
1002 | /* | |
1003 | * Called from device's read routine after it has | |
1004 | * calculated the tty-structure given as argument. | |
1005 | */ | |
d6d7360b | 1006 | ttread(tp, uio) |
4b72e2f9 | 1007 | register struct tty *tp; |
d6d7360b | 1008 | struct uio *uio; |
4147b3f6 BJ |
1009 | { |
1010 | register struct clist *qp; | |
becb115c | 1011 | register c, t_flags; |
875a1e2c | 1012 | int s, first, error = 0; |
4147b3f6 BJ |
1013 | |
1014 | if ((tp->t_state&TS_CARR_ON)==0) | |
840510a3 | 1015 | return (EIO); |
4147b3f6 | 1016 | loop: |
becb115c SL |
1017 | /* |
1018 | * Take any pending input first. | |
1019 | */ | |
875a1e2c | 1020 | s = spl5(); |
becb115c | 1021 | if (tp->t_flags&PENDIN) |
4147b3f6 | 1022 | ttypend(tp); |
875a1e2c | 1023 | splx(s); |
becb115c SL |
1024 | |
1025 | /* | |
1026 | * Hang process if it's in the background. | |
1027 | */ | |
4147b3f6 BJ |
1028 | while (tp == u.u_ttyp && u.u_procp->p_pgrp != tp->t_pgrp) { |
1029 | if (u.u_signal[SIGTTIN] == SIG_IGN || | |
1030 | u.u_signal[SIGTTIN] == SIG_HOLD || | |
1031 | /* | |
1032 | (u.u_procp->p_flag&SDETACH) || | |
1033 | */ | |
1034 | u.u_procp->p_flag&SVFORK) | |
840510a3 | 1035 | return (EIO); |
4147b3f6 BJ |
1036 | gsignal(u.u_procp->p_pgrp, SIGTTIN); |
1037 | sleep((caddr_t)&lbolt, TTIPRI); | |
1038 | } | |
becb115c SL |
1039 | t_flags = tp->t_flags; |
1040 | ||
1041 | /* | |
1042 | * In raw mode take characters directly from the | |
1043 | * raw queue w/o processing. Interlock against | |
1044 | * device interrupts when interrogating rawq. | |
1045 | */ | |
1046 | if (t_flags&RAW) { | |
875a1e2c | 1047 | s = spl5(); |
4147b3f6 | 1048 | if (tp->t_rawq.c_cc <= 0) { |
becb115c | 1049 | if ((tp->t_state&TS_CARR_ON) == 0 || |
4147b3f6 | 1050 | (tp->t_state&TS_NBIO)) { |
875a1e2c | 1051 | splx(s); |
becb115c | 1052 | return (0); |
4147b3f6 BJ |
1053 | } |
1054 | sleep((caddr_t)&tp->t_rawq, TTIPRI); | |
875a1e2c | 1055 | splx(s); |
4147b3f6 BJ |
1056 | goto loop; |
1057 | } | |
875a1e2c SL |
1058 | splx(s); |
1059 | while (!error && tp->t_rawq.c_cc && uio->uio_iovcnt) | |
840510a3 | 1060 | error = passuc(getc(&tp->t_rawq), uio); |
875a1e2c | 1061 | goto checktandem; |
becb115c SL |
1062 | } |
1063 | ||
1064 | /* | |
1065 | * In cbreak mode use the rawq, otherwise | |
1066 | * take characters from the canonicalized q. | |
1067 | */ | |
1068 | qp = t_flags&CBREAK ? &tp->t_rawq : &tp->t_canq; | |
1069 | ||
1070 | /* | |
1071 | * No input, sleep on rawq awaiting hardware | |
1072 | * receipt and notification. | |
1073 | */ | |
875a1e2c | 1074 | s = spl5(); |
becb115c SL |
1075 | if (qp->c_cc <= 0) { |
1076 | if ((tp->t_state&TS_CARR_ON) == 0 || | |
1077 | (tp->t_state&TS_NBIO)) { | |
875a1e2c | 1078 | splx(s); |
becb115c | 1079 | return (EWOULDBLOCK); |
4147b3f6 | 1080 | } |
becb115c | 1081 | sleep((caddr_t)&tp->t_rawq, TTIPRI); |
875a1e2c | 1082 | splx(s); |
becb115c SL |
1083 | goto loop; |
1084 | } | |
875a1e2c | 1085 | splx(s); |
becb115c SL |
1086 | |
1087 | /* | |
1088 | * Input present, perform input mapping | |
1089 | * and processing (we're not in raw mode). | |
1090 | */ | |
1091 | first = 1; | |
1092 | while ((c = getc(qp)) >= 0) { | |
1093 | if (t_flags&CRMOD && c == '\r') | |
1094 | c = '\n'; | |
1095 | /* | |
1096 | * Hack lower case simulation on | |
1097 | * upper case only terminals. | |
1098 | */ | |
1099 | if (t_flags&LCASE && c <= 0177) | |
1100 | if (tp->t_state&TS_BKSL) { | |
1101 | if (maptab[c]) | |
1102 | c = maptab[c]; | |
1103 | tp->t_state &= ~TS_BKSL; | |
1104 | } else if (c >= 'A' && c <= 'Z') | |
1105 | c += 'a' - 'A'; | |
1106 | else if (c == '\\') { | |
1107 | tp->t_state |= TS_BKSL; | |
1108 | continue; | |
4147b3f6 | 1109 | } |
becb115c SL |
1110 | /* |
1111 | * Check for delayed suspend character. | |
1112 | */ | |
1113 | if (tp->t_line == NTTYDISC && c == tp->t_dsuspc) { | |
1114 | gsignal(tp->t_pgrp, SIGTSTP); | |
1115 | if (first) { | |
1116 | sleep((caddr_t)&lbolt, TTIPRI); | |
1117 | goto loop; | |
1118 | } | |
1119 | break; | |
4147b3f6 | 1120 | } |
becb115c SL |
1121 | /* |
1122 | * Interpret EOF only in cooked mode. | |
1123 | */ | |
1124 | if (c == tp->t_eofc && (t_flags&CBREAK) == 0) | |
1125 | break; | |
1126 | /* | |
1127 | * Give user character. | |
1128 | */ | |
1129 | error = passuc(c & 0177, uio); | |
1130 | if (error) | |
1131 | break; | |
1132 | if (uio->uio_iovcnt == 0) | |
1133 | break; | |
1134 | /* | |
1135 | * In cooked mode check for a "break character" | |
1136 | * marking the end of a "line of input". | |
1137 | */ | |
1138 | if ((t_flags&CBREAK) == 0 && ttbreakc(c, tp)) | |
1139 | break; | |
1140 | first = 0; | |
4147b3f6 | 1141 | } |
becb115c SL |
1142 | tp->t_state &= ~TS_BKSL; |
1143 | ||
875a1e2c | 1144 | checktandem: |
becb115c SL |
1145 | /* |
1146 | * Look to unblock output now that (presumably) | |
1147 | * the input queue has gone down. | |
1148 | */ | |
875a1e2c | 1149 | if (tp->t_state&TS_TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) |
becb115c | 1150 | if (putc(tp->t_startc, &tp->t_outq) == 0) { |
4147b3f6 BJ |
1151 | tp->t_state &= ~TS_TBLOCK; |
1152 | ttstart(tp); | |
1153 | } | |
840510a3 | 1154 | return (error); |
4147b3f6 BJ |
1155 | } |
1156 | ||
1157 | /* | |
1158 | * Called from the device's write routine after it has | |
1159 | * calculated the tty-structure given as argument. | |
1160 | */ | |
913ea2d1 | 1161 | ttwrite(tp, uio) |
4b72e2f9 | 1162 | register struct tty *tp; |
becb115c | 1163 | register struct uio *uio; |
4147b3f6 | 1164 | { |
4147b3f6 | 1165 | register char *cp; |
becb115c SL |
1166 | register int cc, ce, c; |
1167 | int i, hiwat, cnt, error, s; | |
4147b3f6 | 1168 | char obuf[OBUFSIZ]; |
4147b3f6 | 1169 | |
becb115c | 1170 | if ((tp->t_state&TS_CARR_ON) == 0) |
840510a3 | 1171 | return (EIO); |
becb115c SL |
1172 | hiwat = TTHIWAT(tp); |
1173 | cnt = uio->uio_resid; | |
1174 | error = 0; | |
4147b3f6 | 1175 | loop: |
becb115c SL |
1176 | /* |
1177 | * Hang the process if it's in the background. | |
1178 | */ | |
4147b3f6 | 1179 | while (u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && |
becb115c | 1180 | (tp->t_flags&TOSTOP) && (u.u_procp->p_flag&SVFORK)==0 && |
4147b3f6 BJ |
1181 | u.u_signal[SIGTTOU] != SIG_IGN && |
1182 | u.u_signal[SIGTTOU] != SIG_HOLD | |
1183 | /* | |
1184 | && | |
1185 | (u.u_procp->p_flag&SDETACH)==0) { | |
1186 | */ | |
1187 | ) { | |
1188 | gsignal(u.u_procp->p_pgrp, SIGTTOU); | |
1189 | sleep((caddr_t)&lbolt, TTIPRI); | |
1190 | } | |
becb115c SL |
1191 | |
1192 | /* | |
1193 | * Process the user's data in at most OBUFSIZ | |
1194 | * chunks. Perform lower case simulation and | |
1195 | * similar hacks. Keep track of high water | |
1196 | * mark, sleep on overflow awaiting device aid | |
1197 | * in acquiring new space. | |
1198 | */ | |
913ea2d1 | 1199 | while (uio->uio_resid > 0) { |
becb115c SL |
1200 | /* |
1201 | * Grab a hunk of data from the user. | |
1202 | */ | |
913ea2d1 BJ |
1203 | cc = uio->uio_iov->iov_len; |
1204 | if (cc == 0) { | |
1205 | uio->uio_iovcnt--; | |
1206 | uio->uio_iov++; | |
1207 | if (uio->uio_iovcnt < 0) | |
1208 | panic("ttwrite"); | |
1209 | continue; | |
1210 | } | |
1211 | if (cc > OBUFSIZ) | |
1212 | cc = OBUFSIZ; | |
4147b3f6 | 1213 | cp = obuf; |
88a7a62a | 1214 | error = uiomove(cp, cc, UIO_WRITE, uio); |
840510a3 | 1215 | if (error) |
4147b3f6 BJ |
1216 | break; |
1217 | if (tp->t_outq.c_cc > hiwat) | |
1218 | goto ovhiwat; | |
becb115c | 1219 | if (tp->t_flags&FLUSHO) |
4147b3f6 | 1220 | continue; |
becb115c SL |
1221 | /* |
1222 | * If we're mapping lower case or kludging tildes, | |
1223 | * then we've got to look at each character, so | |
1224 | * just feed the stuff to ttyoutput... | |
1225 | */ | |
1226 | if (tp->t_flags & (LCASE|TILDE)) { | |
1227 | while (cc > 0) { | |
4147b3f6 BJ |
1228 | c = *cp++; |
1229 | tp->t_rocount = 0; | |
4b72e2f9 | 1230 | while ((c = ttyoutput(c, tp)) >= 0) { |
4147b3f6 BJ |
1231 | /* out of clists, wait a bit */ |
1232 | ttstart(tp); | |
1233 | sleep((caddr_t)&lbolt, TTOPRI); | |
1234 | tp->t_rocount = 0; | |
1235 | } | |
1236 | --cc; | |
1237 | if (tp->t_outq.c_cc > hiwat) | |
1238 | goto ovhiwat; | |
1239 | } | |
1240 | continue; | |
1241 | } | |
becb115c SL |
1242 | /* |
1243 | * If nothing fancy need be done, grab those characters we | |
1244 | * can handle without any of ttyoutput's processing and | |
1245 | * just transfer them to the output q. For those chars | |
1246 | * which require special processing (as indicated by the | |
1247 | * bits in partab), call ttyoutput. After processing | |
1248 | * a hunk of data, look for FLUSHO so ^O's will take effect | |
1249 | * immediately. | |
1250 | */ | |
1251 | while (cc > 0) { | |
1252 | if (tp->t_flags & (RAW|LITOUT)) | |
4147b3f6 BJ |
1253 | ce = cc; |
1254 | else { | |
88a7a62a SL |
1255 | ce = cc - scanc((unsigned)cc, (caddr_t)cp, |
1256 | (caddr_t)partab, 077); | |
becb115c SL |
1257 | /* |
1258 | * If ce is zero, then we're processing | |
1259 | * a special character through ttyoutput. | |
1260 | */ | |
1261 | if (ce == 0) { | |
4147b3f6 BJ |
1262 | tp->t_rocount = 0; |
1263 | if (ttyoutput(*cp, tp) >= 0) { | |
becb115c | 1264 | /* no c-lists, wait a bit */ |
4147b3f6 BJ |
1265 | ttstart(tp); |
1266 | sleep((caddr_t)&lbolt, TTOPRI); | |
1267 | continue; | |
1268 | } | |
becb115c SL |
1269 | cp++, cc--; |
1270 | if (tp->t_flags&FLUSHO || | |
1271 | tp->t_outq.c_cc > hiwat) | |
4147b3f6 | 1272 | goto ovhiwat; |
becb115c | 1273 | continue; |
4147b3f6 BJ |
1274 | } |
1275 | } | |
becb115c SL |
1276 | /* |
1277 | * A bunch of normal characters have been found, | |
1278 | * transfer them en masse to the output queue and | |
1279 | * continue processing at the top of the loop. | |
1280 | * If there are any further characters in this | |
1281 | * <= OBUFSIZ chunk, the first should be a character | |
1282 | * requiring special handling by ttyoutput. | |
1283 | */ | |
4147b3f6 | 1284 | tp->t_rocount = 0; |
becb115c SL |
1285 | i = b_to_q(cp, ce, &tp->t_outq); |
1286 | ce -= i; | |
1287 | tp->t_col += ce; | |
1288 | cp += ce, cc -= ce, tk_nout += ce; | |
1289 | if (i > 0) { | |
1290 | /* out of c-lists, wait a bit */ | |
4147b3f6 BJ |
1291 | ttstart(tp); |
1292 | sleep((caddr_t)&lbolt, TTOPRI); | |
1293 | } | |
becb115c | 1294 | if (tp->t_flags&FLUSHO || tp->t_outq.c_cc > hiwat) |
4147b3f6 BJ |
1295 | goto ovhiwat; |
1296 | } | |
1297 | } | |
1298 | ttstart(tp); | |
840510a3 | 1299 | return (error); |
4147b3f6 BJ |
1300 | |
1301 | ovhiwat: | |
becb115c SL |
1302 | s = spl5(); |
1303 | if (cc != 0) { | |
1304 | uio->uio_iov->iov_base -= cc; | |
1305 | uio->uio_iov->iov_len += cc; | |
1306 | uio->uio_resid += cc; | |
1307 | uio->uio_offset -= cc; | |
1308 | } | |
1309 | /* | |
1310 | * This can only occur if FLUSHO | |
1311 | * is also set in t_flags. | |
1312 | */ | |
4147b3f6 | 1313 | if (tp->t_outq.c_cc <= hiwat) { |
becb115c | 1314 | splx(s); |
4147b3f6 BJ |
1315 | goto loop; |
1316 | } | |
1317 | ttstart(tp); | |
becb115c | 1318 | if (tp->t_state&TS_NBIO) { |
913ea2d1 | 1319 | if (uio->uio_resid == cnt) |
840510a3 BJ |
1320 | return (EWOULDBLOCK); |
1321 | return (0); | |
4147b3f6 BJ |
1322 | } |
1323 | tp->t_state |= TS_ASLEEP; | |
1324 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
becb115c | 1325 | splx(s); |
4147b3f6 BJ |
1326 | goto loop; |
1327 | } | |
1328 | ||
1329 | /* | |
1330 | * Rubout one character from the rawq of tp | |
1331 | * as cleanly as possible. | |
1332 | */ | |
1333 | ttyrub(c, tp) | |
4b72e2f9 SL |
1334 | register c; |
1335 | register struct tty *tp; | |
4147b3f6 BJ |
1336 | { |
1337 | register char *cp; | |
1338 | register int savecol; | |
1339 | int s; | |
1340 | char *nextc(); | |
1341 | ||
becb115c | 1342 | if ((tp->t_flags&ECHO) == 0) |
4147b3f6 | 1343 | return; |
becb115c | 1344 | tp->t_flags &= ~FLUSHO; |
4147b3f6 | 1345 | c &= 0377; |
becb115c | 1346 | if (tp->t_flags&CRTBS) { |
4147b3f6 BJ |
1347 | if (tp->t_rocount == 0) { |
1348 | /* | |
1349 | * Screwed by ttwrite; retype | |
1350 | */ | |
1351 | ttyretype(tp); | |
1352 | return; | |
1353 | } | |
becb115c | 1354 | if (c == ('\t'|0200) || c == ('\n'|0200)) |
4147b3f6 | 1355 | ttyrubo(tp, 2); |
becb115c | 1356 | else switch (partab[c&=0177]&0177) { |
4147b3f6 BJ |
1357 | |
1358 | case ORDINARY: | |
1359 | if (tp->t_flags&LCASE && c >= 'A' && c <= 'Z') | |
1360 | ttyrubo(tp, 2); | |
1361 | else | |
1362 | ttyrubo(tp, 1); | |
1363 | break; | |
1364 | ||
1365 | case VTAB: | |
1366 | case BACKSPACE: | |
1367 | case CONTROL: | |
1368 | case RETURN: | |
becb115c | 1369 | if (tp->t_flags&CTLECH) |
4147b3f6 BJ |
1370 | ttyrubo(tp, 2); |
1371 | break; | |
1372 | ||
1373 | case TAB: | |
1374 | if (tp->t_rocount < tp->t_rawq.c_cc) { | |
1375 | ttyretype(tp); | |
1376 | return; | |
1377 | } | |
1378 | s = spl5(); | |
1379 | savecol = tp->t_col; | |
becb115c SL |
1380 | tp->t_state |= TS_CNTTB; |
1381 | tp->t_flags |= FLUSHO; | |
4147b3f6 | 1382 | tp->t_col = tp->t_rocol; |
becb115c SL |
1383 | cp = tp->t_rawq.c_cf; |
1384 | for (; cp; cp = nextc(&tp->t_rawq, cp)) | |
4147b3f6 | 1385 | ttyecho(*cp, tp); |
becb115c SL |
1386 | tp->t_flags &= ~FLUSHO; |
1387 | tp->t_state &= ~TS_CNTTB; | |
4147b3f6 BJ |
1388 | splx(s); |
1389 | /* | |
1390 | * savecol will now be length of the tab | |
1391 | */ | |
1392 | savecol -= tp->t_col; | |
1393 | tp->t_col += savecol; | |
1394 | if (savecol > 8) | |
1395 | savecol = 8; /* overflow screw */ | |
1396 | while (--savecol >= 0) | |
1397 | (void) ttyoutput('\b', tp); | |
1398 | break; | |
1399 | ||
1400 | default: | |
1401 | panic("ttyrub"); | |
1402 | } | |
becb115c SL |
1403 | } else if (tp->t_flags&PRTERA) { |
1404 | if ((tp->t_state&TS_ERASE) == 0) { | |
4147b3f6 | 1405 | (void) ttyoutput('\\', tp); |
becb115c | 1406 | tp->t_state |= TS_ERASE; |
4147b3f6 BJ |
1407 | } |
1408 | ttyecho(c, tp); | |
1409 | } else | |
1410 | ttyecho(tp->t_erase, tp); | |
1411 | tp->t_rocount--; | |
1412 | } | |
1413 | ||
1414 | /* | |
1415 | * Crt back over cnt chars perhaps | |
1416 | * erasing them. | |
1417 | */ | |
1418 | ttyrubo(tp, cnt) | |
4b72e2f9 SL |
1419 | register struct tty *tp; |
1420 | int cnt; | |
4147b3f6 | 1421 | { |
becb115c | 1422 | register char *rubostring = tp->t_flags&CRTERA ? "\b \b" : "\b"; |
4147b3f6 BJ |
1423 | |
1424 | while (--cnt >= 0) | |
becb115c | 1425 | ttyout(rubostring, tp); |
4147b3f6 BJ |
1426 | } |
1427 | ||
1428 | /* | |
1429 | * Reprint the rawq line. | |
1430 | * We assume c_cc has already been checked. | |
1431 | */ | |
1432 | ttyretype(tp) | |
4b72e2f9 | 1433 | register struct tty *tp; |
4147b3f6 BJ |
1434 | { |
1435 | register char *cp; | |
1436 | char *nextc(); | |
1437 | int s; | |
1438 | ||
becb115c SL |
1439 | if (tp->t_rprntc != 0377) |
1440 | ttyecho(tp->t_rprntc, tp); | |
4147b3f6 BJ |
1441 | (void) ttyoutput('\n', tp); |
1442 | s = spl5(); | |
1443 | for (cp = tp->t_canq.c_cf; cp; cp = nextc(&tp->t_canq, cp)) | |
1444 | ttyecho(*cp, tp); | |
1445 | for (cp = tp->t_rawq.c_cf; cp; cp = nextc(&tp->t_rawq, cp)) | |
1446 | ttyecho(*cp, tp); | |
becb115c | 1447 | tp->t_state &= ~TS_ERASE; |
4147b3f6 BJ |
1448 | splx(s); |
1449 | tp->t_rocount = tp->t_rawq.c_cc; | |
1450 | tp->t_rocol = 0; | |
1451 | } | |
1452 | ||
1453 | /* | |
1454 | * Echo a typed character to the terminal | |
1455 | */ | |
1456 | ttyecho(c, tp) | |
4b72e2f9 SL |
1457 | register c; |
1458 | register struct tty *tp; | |
4147b3f6 BJ |
1459 | { |
1460 | ||
becb115c SL |
1461 | if ((tp->t_state&TS_CNTTB) == 0) |
1462 | tp->t_flags &= ~FLUSHO; | |
4147b3f6 BJ |
1463 | if ((tp->t_flags&ECHO) == 0) |
1464 | return; | |
1465 | c &= 0377; | |
1466 | if (tp->t_flags&RAW) { | |
1467 | (void) ttyoutput(c, tp); | |
1468 | return; | |
1469 | } | |
1470 | if (c == '\r' && tp->t_flags&CRMOD) | |
1471 | c = '\n'; | |
becb115c | 1472 | if (tp->t_flags&CTLECH) { |
4147b3f6 BJ |
1473 | if ((c&0177) <= 037 && c!='\t' && c!='\n' || (c&0177)==0177) { |
1474 | (void) ttyoutput('^', tp); | |
1475 | c &= 0177; | |
1476 | if (c == 0177) | |
1477 | c = '?'; | |
1478 | else if (tp->t_flags&LCASE) | |
1479 | c += 'a' - 1; | |
1480 | else | |
1481 | c += 'A' - 1; | |
1482 | } | |
1483 | } | |
1484 | if ((tp->t_flags&LCASE) && (c >= 'A' && c <= 'Z')) | |
1485 | c += 'a' - 'A'; | |
becb115c | 1486 | (void) ttyoutput(c&0177, tp); |
4147b3f6 BJ |
1487 | } |
1488 | ||
1489 | /* | |
1490 | * Is c a break char for tp? | |
1491 | */ | |
1492 | ttbreakc(c, tp) | |
4b72e2f9 SL |
1493 | register c; |
1494 | register struct tty *tp; | |
4147b3f6 | 1495 | { |
becb115c | 1496 | return (c == '\n' || c == tp->t_eofc || c == tp->t_brkc || |
4147b3f6 BJ |
1497 | c == '\r' && (tp->t_flags&CRMOD)); |
1498 | } | |
1499 | ||
1500 | /* | |
1501 | * send string cp to tp | |
1502 | */ | |
1503 | ttyout(cp, tp) | |
4b72e2f9 SL |
1504 | register char *cp; |
1505 | register struct tty *tp; | |
4147b3f6 BJ |
1506 | { |
1507 | register char c; | |
1508 | ||
1509 | while (c = *cp++) | |
1510 | (void) ttyoutput(c, tp); | |
1511 | } | |
1512 | ||
1513 | ttwakeup(tp) | |
1514 | struct tty *tp; | |
1515 | { | |
1516 | ||
1517 | if (tp->t_rsel) { | |
1518 | selwakeup(tp->t_rsel, tp->t_state&TS_RCOLL); | |
1519 | tp->t_state &= ~TS_RCOLL; | |
1520 | tp->t_rsel = 0; | |
1521 | } | |
88a7a62a SL |
1522 | if (tp->t_state & TS_ASYNC) |
1523 | gsignal(tp->t_pgrp, SIGIO); | |
4147b3f6 BJ |
1524 | wakeup((caddr_t)&tp->t_rawq); |
1525 | } | |
1526 | ||
7c9f96c0 | 1527 | #if !defined(vax) && !defined(sun) |
becb115c SL |
1528 | scanc(size, cp, table, mask) |
1529 | register int size; | |
1530 | register char *cp, table[]; | |
1531 | register int mask; | |
4147b3f6 | 1532 | { |
becb115c | 1533 | register int i = 0; |
4147b3f6 | 1534 | |
becb115c SL |
1535 | while ((table[*(u_char *)(cp + i)]&mask) == 0 && i < size) |
1536 | i++; | |
1537 | return (i); | |
4147b3f6 | 1538 | } |
becb115c | 1539 | #endif |