Commit | Line | Data |
---|---|---|
961945a8 SL |
1 | /* tty.c 4.37 82/12/17 */ |
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 | */ |
50e2732b | 115 | wflushtty(tp) |
941944c9 | 116 | register struct tty *tp; |
89dc6dfb BJ |
117 | { |
118 | ||
50e2732b | 119 | (void) spl5(); |
4c67f645 BJ |
120 | while (tp->t_outq.c_cc && tp->t_state&TS_CARR_ON |
121 | && tp->t_oproc) { /* kludge for pty */ | |
50e2732b | 122 | (*tp->t_oproc)(tp); |
941944c9 | 123 | tp->t_state |= TS_ASLEEP; |
50e2732b BJ |
124 | sleep((caddr_t)&tp->t_outq, TTOPRI); |
125 | } | |
39697bd8 | 126 | flushtty(tp, FREAD); |
50e2732b | 127 | (void) spl0(); |
89dc6dfb BJ |
128 | } |
129 | ||
130 | /* | |
becb115c | 131 | * Flush all TTY queues |
89dc6dfb | 132 | */ |
50e2732b | 133 | flushtty(tp, rw) |
4b72e2f9 | 134 | register struct tty *tp; |
89dc6dfb | 135 | { |
50e2732b BJ |
136 | register s; |
137 | ||
50e2732b BJ |
138 | s = spl6(); |
139 | if (rw & FREAD) { | |
140 | while (getc(&tp->t_canq) >= 0) | |
141 | ; | |
142 | wakeup((caddr_t)&tp->t_rawq); | |
143 | } | |
144 | if (rw & FWRITE) { | |
145 | wakeup((caddr_t)&tp->t_outq); | |
941944c9 | 146 | tp->t_state &= ~TS_TTSTOP; |
39697bd8 | 147 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, rw); |
50e2732b BJ |
148 | while (getc(&tp->t_outq) >= 0) |
149 | ; | |
150 | } | |
151 | if (rw & FREAD) { | |
152 | while (getc(&tp->t_rawq) >= 0) | |
153 | ; | |
154 | tp->t_delct = 0; | |
becb115c | 155 | tp->t_rocount = 0; |
50e2732b | 156 | tp->t_rocol = 0; |
becb115c | 157 | tp->t_state &= ~TS_LOCAL; |
50e2732b BJ |
158 | } |
159 | splx(s); | |
89dc6dfb BJ |
160 | } |
161 | ||
50e2732b BJ |
162 | /* |
163 | * Send stop character on input overflow. | |
164 | */ | |
165 | ttyblock(tp) | |
4b72e2f9 | 166 | register struct tty *tp; |
89dc6dfb | 167 | { |
50e2732b | 168 | register x; |
becb115c | 169 | |
50e2732b BJ |
170 | x = tp->t_rawq.c_cc + tp->t_canq.c_cc; |
171 | if (tp->t_rawq.c_cc > TTYHOG) { | |
172 | flushtty(tp, FREAD|FWRITE); | |
941944c9 | 173 | tp->t_state &= ~TS_TBLOCK; |
50e2732b | 174 | } |
becb115c SL |
175 | if (x >= TTYHOG/2 && putc(tp->t_stopc, &tp->t_outq) == 0) { |
176 | tp->t_state |= TS_TBLOCK; | |
177 | tp->t_char++; | |
178 | ttstart(tp); | |
50e2732b | 179 | } |
89dc6dfb BJ |
180 | } |
181 | ||
101ba270 | 182 | /* |
50e2732b BJ |
183 | * Restart typewriter output following a delay |
184 | * timeout. | |
185 | * The name of the routine is passed to the timeout | |
186 | * subroutine and it is called during a clock interrupt. | |
101ba270 | 187 | */ |
50e2732b | 188 | ttrstrt(tp) |
4b72e2f9 | 189 | register struct tty *tp; |
101ba270 BJ |
190 | { |
191 | ||
becb115c SL |
192 | if (tp == 0) |
193 | panic("ttrstrt"); | |
941944c9 | 194 | tp->t_state &= ~TS_TIMEOUT; |
50e2732b | 195 | ttstart(tp); |
101ba270 BJ |
196 | } |
197 | ||
89dc6dfb | 198 | /* |
50e2732b BJ |
199 | * Start output on the typewriter. It is used from the top half |
200 | * after some characters have been put on the output queue, | |
201 | * from the interrupt routine to transmit the next | |
202 | * character, and after a timeout has finished. | |
89dc6dfb | 203 | */ |
50e2732b | 204 | ttstart(tp) |
4b72e2f9 | 205 | register struct tty *tp; |
89dc6dfb | 206 | { |
50e2732b | 207 | register s; |
8062c8a7 | 208 | |
50e2732b | 209 | s = spl5(); |
becb115c | 210 | if ((tp->t_state & (TS_TIMEOUT|TS_TTSTOP|TS_BUSY)) == 0 && |
4c67f645 | 211 | tp->t_oproc) /* kludge for pty */ |
50e2732b BJ |
212 | (*tp->t_oproc)(tp); |
213 | splx(s); | |
89dc6dfb BJ |
214 | } |
215 | ||
216 | /* | |
50e2732b | 217 | * Common code for tty ioctls. |
89dc6dfb | 218 | */ |
49c84d3f | 219 | /*ARGSUSED*/ |
4b72e2f9 SL |
220 | ttioctl(tp, com, data, flag) |
221 | register struct tty *tp; | |
222 | caddr_t data; | |
89dc6dfb | 223 | { |
840510a3 | 224 | int dev = tp->t_dev; |
89dc6dfb | 225 | extern int nldisp; |
fc6972ae | 226 | int s; |
89dc6dfb | 227 | |
50e2732b BJ |
228 | /* |
229 | * If the ioctl involves modification, | |
230 | * insist on being able to write the device, | |
231 | * and hang if in the background. | |
232 | */ | |
4b72e2f9 | 233 | switch (com) { |
50e2732b | 234 | |
c6fe3a50 BJ |
235 | case TIOCSETD: |
236 | case TIOCSETP: | |
237 | case TIOCSETN: | |
50e2732b BJ |
238 | case TIOCFLUSH: |
239 | case TIOCSETC: | |
240 | case TIOCSLTC: | |
241 | case TIOCSPGRP: | |
242 | case TIOCLBIS: | |
243 | case TIOCLBIC: | |
244 | case TIOCLSET: | |
67ba7f0d SL |
245 | case TIOCBIS: |
246 | case TIOCBIC: | |
247 | case TIOCSET: | |
8203fe05 | 248 | case TIOCSTI: |
50e2732b BJ |
249 | while (tp->t_line == NTTYDISC && |
250 | u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && | |
251 | (u.u_procp->p_flag&SVFORK) == 0 && | |
252 | u.u_signal[SIGTTOU] != SIG_IGN && | |
fc6972ae | 253 | u.u_signal[SIGTTOU] != SIG_HOLD) { |
50e2732b BJ |
254 | gsignal(u.u_procp->p_pgrp, SIGTTOU); |
255 | sleep((caddr_t)&lbolt, TTOPRI); | |
256 | } | |
257 | break; | |
258 | } | |
259 | ||
becb115c SL |
260 | /* |
261 | * Process the ioctl. | |
262 | */ | |
4b72e2f9 | 263 | switch (com) { |
89dc6dfb | 264 | |
fc6972ae | 265 | /* get discipline number */ |
89dc6dfb | 266 | case TIOCGETD: |
4b72e2f9 | 267 | *(int *)data = tp->t_line; |
89dc6dfb BJ |
268 | break; |
269 | ||
fc6972ae | 270 | /* set line discipline */ |
4b72e2f9 SL |
271 | case TIOCSETD: { |
272 | register int t = *(int *)data; | |
becb115c | 273 | int error = 0; |
4b72e2f9 | 274 | |
becb115c SL |
275 | if (t >= nldisp) { |
276 | u.u_error = ENXIO; | |
277 | break; | |
278 | } | |
fc6972ae | 279 | s = spl5(); |
89dc6dfb BJ |
280 | if (tp->t_line) |
281 | (*linesw[tp->t_line].l_close)(tp); | |
282 | if (t) | |
fc6972ae BJ |
283 | error = (*linesw[t].l_open)(dev, tp); |
284 | splx(s); | |
285 | if (error) | |
286 | return (error); | |
287 | tp->t_line = t; | |
89dc6dfb | 288 | break; |
4b72e2f9 | 289 | } |
89dc6dfb | 290 | |
fc6972ae | 291 | /* prevent more opens on channel */ |
152c2598 BJ |
292 | case TIOCEXCL: |
293 | tp->t_state |= TS_XCLUDE; | |
294 | break; | |
295 | ||
296 | case TIOCNXCL: | |
297 | tp->t_state &= ~TS_XCLUDE; | |
298 | break; | |
299 | ||
67ba7f0d SL |
300 | case TIOCSET: |
301 | case TIOCBIS: { | |
302 | u_long newflags = *(u_long *)data; | |
4b72e2f9 | 303 | |
67ba7f0d SL |
304 | s = spl5(); |
305 | if (tp->t_flags&RAW || newflags&RAW) | |
e1d74936 | 306 | wflushtty(tp); |
67ba7f0d SL |
307 | else if ((tp->t_flags&CBREAK) != (newflags&CBREAK)) |
308 | if (newflags&CBREAK) { | |
309 | struct clist tq; | |
310 | ||
e1d74936 BJ |
311 | catq(&tp->t_rawq, &tp->t_canq); |
312 | tq = tp->t_rawq; | |
313 | tp->t_rawq = tp->t_canq; | |
314 | tp->t_canq = tq; | |
315 | } else { | |
becb115c | 316 | tp->t_flags |= PENDIN; |
e1d74936 | 317 | ttwakeup(tp); |
8062c8a7 | 318 | } |
67ba7f0d SL |
319 | if (com == TIOCSET) |
320 | tp->t_flags = newflags; | |
321 | else | |
322 | tp->t_flags |= newflags; | |
becb115c | 323 | if (tp->t_flags&RAW) { |
941944c9 | 324 | tp->t_state &= ~TS_TTSTOP; |
627c86ee KB |
325 | ttstart(tp); |
326 | } | |
67ba7f0d | 327 | splx(s); |
89dc6dfb | 328 | break; |
4b72e2f9 | 329 | } |
89dc6dfb | 330 | |
67ba7f0d SL |
331 | case TIOCBIC: { |
332 | u_long newflags = *(long *)data; | |
4b72e2f9 | 333 | |
67ba7f0d SL |
334 | if (tp->t_flags&RAW) |
335 | wflushtty(tp); | |
336 | else if ((tp->t_flags&CBREAK) != (CBREAK&~newflags)) | |
337 | if (newflags&CBREAK) { | |
338 | tp->t_flags |= PENDIN; | |
339 | ttwakeup(tp); | |
340 | } else { | |
341 | struct clist tq; | |
342 | ||
343 | catq(&tp->t_rawq, &tp->t_canq); | |
344 | tq = tp->t_rawq; | |
345 | tp->t_rawq = tp->t_canq; | |
346 | tp->t_canq = tq; | |
347 | } | |
348 | if (tp->t_flags&RAW) { | |
349 | tp->t_state &= ~TS_TTSTOP; | |
350 | ttstart(tp); | |
351 | } | |
352 | splx(s); | |
89dc6dfb | 353 | break; |
4b72e2f9 | 354 | } |
89dc6dfb | 355 | |
67ba7f0d SL |
356 | case TIOCGET: |
357 | *(long *)data = tp->t_flags; | |
358 | break; | |
359 | ||
360 | case TIOCCGET: | |
361 | bcopy((caddr_t)&tp->t_chars, data, sizeof (struct ttychars)); | |
362 | break; | |
363 | ||
364 | case TIOCCSET: | |
365 | bcopy(data, (caddr_t)&tp->t_chars, sizeof (struct ttychars)); | |
366 | break; | |
367 | ||
fc6972ae | 368 | /* hang up line on last close */ |
89dc6dfb | 369 | case TIOCHPCL: |
941944c9 | 370 | tp->t_state |= TS_HUPCLS; |
89dc6dfb BJ |
371 | break; |
372 | ||
7d973a4d | 373 | case TIOCFLUSH: { |
4b72e2f9 SL |
374 | register int flags = *(int *)data; |
375 | ||
376 | if (flags == 0) | |
7d973a4d | 377 | flags = FREAD|FWRITE; |
4b72e2f9 SL |
378 | else |
379 | flags &= FREAD|FWRITE; | |
7d973a4d | 380 | flushtty(tp, flags); |
89dc6dfb | 381 | break; |
4568c08e | 382 | } |
89dc6dfb | 383 | |
fc6972ae | 384 | /* return number of characters immediately available */ |
4b72e2f9 SL |
385 | case FIONREAD: |
386 | *(off_t *)data = ttnread(tp); | |
8062c8a7 | 387 | break; |
8062c8a7 | 388 | |
a8d3bf7f BJ |
389 | case TIOCSTOP: |
390 | s = spl5(); | |
becb115c | 391 | if ((tp->t_state&TS_TTSTOP) == 0) { |
bfcf09ee BJ |
392 | tp->t_state |= TS_TTSTOP; |
393 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
394 | } | |
4b72e2f9 | 395 | splx(s); |
bfcf09ee BJ |
396 | break; |
397 | ||
a8d3bf7f BJ |
398 | case TIOCSTART: |
399 | s = spl5(); | |
becb115c | 400 | if ((tp->t_state&TS_TTSTOP) || (tp->t_flags&FLUSHO)) { |
bfcf09ee | 401 | tp->t_state &= ~TS_TTSTOP; |
becb115c | 402 | tp->t_flags &= ~FLUSHO; |
bfcf09ee BJ |
403 | ttstart(tp); |
404 | } | |
4b72e2f9 | 405 | splx(s); |
bfcf09ee BJ |
406 | break; |
407 | ||
8203fe05 SL |
408 | /* |
409 | * Simulate typing of a character at the terminal. | |
410 | */ | |
411 | case TIOCSTI: | |
412 | if (u.u_uid && u.u_ttyp != tp) | |
413 | return (EACCES); | |
becb115c | 414 | (*linesw[tp->t_line].l_rint)(*(char *)data, tp); |
8203fe05 SL |
415 | break; |
416 | ||
89dc6dfb | 417 | default: |
67ba7f0d SL |
418 | #ifndef NOCOMPAT |
419 | return (ottioctl(tp, com, data, flag)); | |
420 | #else | |
fc6972ae | 421 | return (-1); |
67ba7f0d | 422 | #endif |
89dc6dfb | 423 | } |
fc6972ae | 424 | return (0); |
89dc6dfb | 425 | } |
e1d74936 BJ |
426 | |
427 | ttnread(tp) | |
428 | struct tty *tp; | |
429 | { | |
430 | int nread = 0; | |
431 | ||
becb115c | 432 | if (tp->t_flags & PENDIN) |
e1d74936 BJ |
433 | ttypend(tp); |
434 | nread = tp->t_canq.c_cc; | |
435 | if (tp->t_flags & (RAW|CBREAK)) | |
436 | nread += tp->t_rawq.c_cc; | |
437 | return (nread); | |
438 | } | |
439 | ||
941944c9 | 440 | ttselect(dev, rw) |
e1d74936 | 441 | dev_t dev; |
941944c9 | 442 | int rw; |
e1d74936 BJ |
443 | { |
444 | register struct tty *tp = &cdevsw[major(dev)].d_ttys[minor(dev)]; | |
445 | int nread; | |
941944c9 | 446 | int s = spl5(); |
e1d74936 | 447 | |
941944c9 | 448 | switch (rw) { |
e1d74936 BJ |
449 | |
450 | case FREAD: | |
451 | nread = ttnread(tp); | |
452 | if (nread > 0) | |
941944c9 | 453 | goto win; |
89b8a44c | 454 | if (tp->t_rsel && tp->t_rsel->p_wchan == (caddr_t)&selwait) |
941944c9 | 455 | tp->t_state |= TS_RCOLL; |
e1d74936 BJ |
456 | else |
457 | tp->t_rsel = u.u_procp; | |
941944c9 | 458 | break; |
e1d74936 | 459 | |
941944c9 BJ |
460 | case FWRITE: |
461 | if (tp->t_outq.c_cc <= TTLOWAT(tp)) | |
462 | goto win; | |
941944c9 BJ |
463 | if (tp->t_wsel && tp->t_wsel->p_wchan == (caddr_t)&selwait) |
464 | tp->t_state |= TS_WCOLL; | |
465 | else | |
466 | tp->t_wsel = u.u_procp; | |
467 | break; | |
e1d74936 | 468 | } |
941944c9 BJ |
469 | splx(s); |
470 | return (0); | |
471 | win: | |
472 | splx(s); | |
473 | return (1); | |
e1d74936 | 474 | } |
8bba2b8f | 475 | |
4147b3f6 | 476 | /* |
becb115c | 477 | * Establish a process group for distribution of |
4147b3f6 | 478 | * quits and interrupts from the tty. |
4147b3f6 BJ |
479 | */ |
480 | ttyopen(dev, tp) | |
4b72e2f9 SL |
481 | dev_t dev; |
482 | register struct tty *tp; | |
4147b3f6 BJ |
483 | { |
484 | register struct proc *pp; | |
485 | ||
486 | pp = u.u_procp; | |
487 | tp->t_dev = dev; | |
4b72e2f9 | 488 | if (pp->p_pgrp == 0) { |
4147b3f6 BJ |
489 | u.u_ttyp = tp; |
490 | u.u_ttyd = dev; | |
491 | if (tp->t_pgrp == 0) | |
492 | tp->t_pgrp = pp->p_pid; | |
493 | pp->p_pgrp = tp->t_pgrp; | |
494 | } | |
495 | tp->t_state &= ~TS_WOPEN; | |
496 | tp->t_state |= TS_ISOPEN; | |
497 | if (tp->t_line != NTTYDISC) | |
498 | wflushtty(tp); | |
fc6972ae | 499 | return (0); |
4147b3f6 BJ |
500 | } |
501 | ||
502 | /* | |
503 | * clean tp on last close | |
504 | */ | |
505 | ttyclose(tp) | |
4b72e2f9 | 506 | register struct tty *tp; |
4147b3f6 BJ |
507 | { |
508 | ||
509 | if (tp->t_line) { | |
510 | wflushtty(tp); | |
511 | tp->t_line = 0; | |
512 | return; | |
513 | } | |
514 | tp->t_pgrp = 0; | |
515 | wflushtty(tp); | |
516 | tp->t_state = 0; | |
517 | } | |
518 | ||
519 | /* | |
520 | * reinput pending characters after state switch | |
521 | * call at spl5(). | |
522 | */ | |
523 | ttypend(tp) | |
4b72e2f9 | 524 | register struct tty *tp; |
4147b3f6 BJ |
525 | { |
526 | struct clist tq; | |
527 | register c; | |
528 | ||
becb115c SL |
529 | tp->t_flags &= ~PENDIN; |
530 | tp->t_state |= TS_TYPEN; | |
4147b3f6 BJ |
531 | tq = tp->t_rawq; |
532 | tp->t_rawq.c_cc = 0; | |
533 | tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0; | |
534 | while ((c = getc(&tq)) >= 0) | |
535 | ttyinput(c, tp); | |
becb115c | 536 | tp->t_state &= ~TS_TYPEN; |
4147b3f6 BJ |
537 | } |
538 | ||
539 | /* | |
becb115c SL |
540 | * Place a character on raw TTY input queue, |
541 | * putting in delimiters and waking up top | |
542 | * half as needed. Also echo if required. | |
543 | * The arguments are the character and the | |
544 | * appropriate tty structure. | |
4147b3f6 BJ |
545 | */ |
546 | ttyinput(c, tp) | |
4b72e2f9 SL |
547 | register c; |
548 | register struct tty *tp; | |
4147b3f6 | 549 | { |
becb115c | 550 | register int t_flags = tp->t_flags; |
4147b3f6 BJ |
551 | int i; |
552 | ||
becb115c SL |
553 | /* |
554 | * If input is pending take it first. | |
555 | */ | |
556 | if (t_flags&PENDIN) | |
4147b3f6 BJ |
557 | ttypend(tp); |
558 | tk_nin++; | |
559 | c &= 0377; | |
becb115c SL |
560 | |
561 | /* | |
562 | * In tandem mode, check high water mark. | |
563 | */ | |
4147b3f6 BJ |
564 | if (t_flags&TANDEM) |
565 | ttyblock(tp); | |
becb115c SL |
566 | |
567 | if (t_flags&RAW) { | |
568 | /* | |
569 | * Raw mode, just put character | |
570 | * in input q w/o interpretation. | |
571 | */ | |
572 | if (tp->t_rawq.c_cc > TTYHOG) | |
573 | flushtty(tp, FREAD|FWRITE); | |
574 | else { | |
575 | if (putc(c, &tp->t_rawq) >= 0) | |
576 | ttwakeup(tp); | |
577 | ttyecho(c, tp); | |
4147b3f6 | 578 | } |
becb115c SL |
579 | goto endcase; |
580 | } | |
581 | ||
582 | /* | |
583 | * Ignore any high bit added during | |
584 | * previous ttyinput processing. | |
585 | */ | |
586 | if ((tp->t_state&TS_TYPEN) == 0) | |
587 | c &= 0177; | |
588 | /* | |
589 | * Check for literal nexting very first | |
590 | */ | |
591 | if (tp->t_state&TS_LNCH) { | |
592 | c |= 0200; | |
593 | tp->t_state &= ~TS_LNCH; | |
594 | } | |
595 | ||
596 | /* | |
597 | * Scan for special characters. This code | |
598 | * is really just a big case statement with | |
599 | * non-constant cases. The bottom of the | |
600 | * case statement is labeled ``endcase'', so goto | |
601 | * it after a case match, or similar. | |
602 | */ | |
603 | if (tp->t_line == NTTYDISC) { | |
604 | if (c == tp->t_lnextc) { | |
4147b3f6 BJ |
605 | if (tp->t_flags&ECHO) |
606 | ttyout("^\b", tp); | |
becb115c SL |
607 | tp->t_state |= TS_LNCH; |
608 | goto endcase; | |
609 | } | |
610 | if (c == tp->t_flushc) { | |
611 | if (tp->t_flags&FLUSHO) | |
612 | tp->t_flags &= ~FLUSHO; | |
4147b3f6 BJ |
613 | else { |
614 | flushtty(tp, FWRITE); | |
615 | ttyecho(c, tp); | |
becb115c | 616 | if (tp->t_rawq.c_cc + tp->t_canq.c_cc) |
4147b3f6 | 617 | ttyretype(tp); |
becb115c | 618 | tp->t_flags |= FLUSHO; |
4147b3f6 | 619 | } |
becb115c SL |
620 | goto startoutput; |
621 | } | |
622 | if (c == tp->t_suspc) { | |
623 | if ((tp->t_flags&NOFLSH) == 0) | |
624 | flushtty(tp, FREAD); | |
4147b3f6 | 625 | ttyecho(c, tp); |
becb115c SL |
626 | gsignal(tp->t_pgrp, SIGTSTP); |
627 | goto endcase; | |
628 | } | |
629 | } | |
630 | ||
631 | /* | |
632 | * Handle start/stop characters. | |
633 | */ | |
634 | if (c == tp->t_stopc) { | |
635 | if ((tp->t_state&TS_TTSTOP) == 0) { | |
636 | tp->t_state |= TS_TTSTOP; | |
637 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
638 | return; | |
639 | } | |
640 | if (c != tp->t_startc) | |
641 | return; | |
642 | goto endcase; | |
643 | } | |
644 | if (c == tp->t_startc) | |
645 | goto restartoutput; | |
646 | ||
647 | /* | |
648 | * Look for interrupt/quit chars. | |
649 | */ | |
650 | if (c == tp->t_intrc || c == tp->t_quitc) { | |
651 | if ((tp->t_flags&NOFLSH) == 0) | |
652 | flushtty(tp, FREAD|FWRITE); | |
653 | ttyecho(c, tp); | |
654 | gsignal(tp->t_pgrp, c == tp->t_intrc ? SIGINT : SIGQUIT); | |
655 | goto endcase; | |
656 | } | |
657 | ||
658 | /* | |
659 | * Cbreak mode, don't process line editing | |
660 | * characters; check high water mark for wakeup. | |
661 | */ | |
662 | if (t_flags&CBREAK) { | |
663 | if (tp->t_rawq.c_cc > TTYHOG) { | |
4147b3f6 BJ |
664 | if (tp->t_outq.c_cc < TTHIWAT(tp) && |
665 | tp->t_line == NTTYDISC) | |
666 | (void) ttyoutput(CTRL(g), tp); | |
667 | } else if (putc(c, &tp->t_rawq) >= 0) { | |
668 | ttwakeup(tp); | |
669 | ttyecho(c, tp); | |
670 | } | |
becb115c SL |
671 | goto endcase; |
672 | } | |
673 | ||
674 | /* | |
675 | * From here on down cooked mode character | |
676 | * processing takes place. | |
677 | */ | |
678 | if ((tp->t_state&TS_QUOT) && | |
679 | (c == tp->t_erase || c == tp->t_kill)) { | |
680 | ttyrub(unputc(&tp->t_rawq), tp); | |
681 | c |= 0200; | |
682 | } | |
683 | if (c == tp->t_erase) { | |
684 | if (tp->t_rawq.c_cc) | |
685 | ttyrub(unputc(&tp->t_rawq), tp); | |
686 | goto endcase; | |
687 | } | |
688 | if (c == tp->t_kill) { | |
689 | if (tp->t_flags&CRTKIL && | |
690 | tp->t_rawq.c_cc == tp->t_rocount) { | |
691 | while (tp->t_rawq.c_cc) | |
692 | ttyrub(unputc(&tp->t_rawq), tp); | |
693 | } else { | |
694 | ttyecho(c, tp); | |
695 | ttyecho('\n', tp); | |
696 | while (getc(&tp->t_rawq) > 0) | |
697 | ; | |
698 | tp->t_rocount = 0; | |
699 | } | |
700 | tp->t_state &= ~TS_LOCAL; | |
701 | goto endcase; | |
702 | } | |
703 | ||
704 | /* | |
705 | * New line discipline, | |
706 | * check word erase/reprint line. | |
707 | */ | |
708 | if (tp->t_line == NTTYDISC) { | |
709 | if (c == tp->t_werasc) { | |
710 | if (tp->t_rawq.c_cc == 0) | |
711 | goto endcase; | |
712 | do { | |
713 | c = unputc(&tp->t_rawq); | |
714 | if (c != ' ' && c != '\t') | |
715 | goto erasenb; | |
716 | ttyrub(c, tp); | |
717 | } while (tp->t_rawq.c_cc); | |
718 | goto endcase; | |
719 | erasenb: | |
720 | do { | |
721 | ttyrub(c, tp); | |
722 | if (tp->t_rawq.c_cc == 0) | |
723 | goto endcase; | |
724 | c = unputc(&tp->t_rawq); | |
725 | } while (c != ' ' && c != '\t'); | |
726 | (void) putc(c, &tp->t_rawq); | |
727 | goto endcase; | |
728 | } | |
729 | if (c == tp->t_rprntc) { | |
730 | ttyretype(tp); | |
731 | goto endcase; | |
732 | } | |
733 | } | |
734 | ||
735 | /* | |
736 | * Check for input buffer overflow | |
737 | */ | |
738 | if (tp->t_rawq.c_cc+tp->t_canq.c_cc >= TTYHOG) | |
739 | goto endcase; | |
740 | ||
741 | /* | |
742 | * Put data char in q for user and | |
743 | * wakeup on seeing a line delimiter. | |
744 | */ | |
745 | if (putc(c, &tp->t_rawq) >= 0) { | |
746 | if (tp->t_rawq.c_cc + tp->t_canq.c_cc == TTYHOG | |
747 | && tp->t_line == NTTYDISC) | |
748 | (void) ttyoutput(CTRL(g), tp); | |
749 | if (ttbreakc(c, tp)) { | |
750 | tp->t_rocount = 0; | |
751 | catq(&tp->t_rawq, &tp->t_canq); | |
4147b3f6 | 752 | ttwakeup(tp); |
becb115c SL |
753 | } else if (tp->t_rocount++ == 0) |
754 | tp->t_rocol = tp->t_col; | |
755 | tp->t_state &= ~TS_QUOT; | |
756 | if (c == '\\') | |
757 | tp->t_state |= TS_QUOT; | |
758 | if (tp->t_state&TS_ERASE) { | |
759 | tp->t_state &= ~TS_ERASE; | |
760 | (void) ttyoutput('/', tp); | |
761 | } | |
762 | i = tp->t_col; | |
4147b3f6 | 763 | ttyecho(c, tp); |
becb115c SL |
764 | if (c == tp->t_eofc && tp->t_flags&ECHO) { |
765 | i = MIN(2, tp->t_col - i); | |
766 | while (i > 0) { | |
767 | (void) ttyoutput('\b', tp); | |
768 | i--; | |
769 | } | |
770 | } | |
4147b3f6 | 771 | } |
becb115c SL |
772 | |
773 | endcase: | |
774 | /* | |
775 | * If DEC-style start/stop is enabled don't restart | |
776 | * output until seeing the start character. | |
777 | */ | |
778 | if (tp->t_flags&DECCTQ && tp->t_state&TS_TTSTOP && | |
779 | tp->t_startc != tp->t_stopc) | |
4147b3f6 | 780 | return; |
becb115c SL |
781 | |
782 | restartoutput: | |
4147b3f6 | 783 | tp->t_state &= ~TS_TTSTOP; |
becb115c SL |
784 | tp->t_flags &= ~FLUSHO; |
785 | ||
786 | startoutput: | |
4147b3f6 BJ |
787 | ttstart(tp); |
788 | } | |
789 | ||
790 | /* | |
becb115c | 791 | * Put character on TTY output queue, adding delays, |
4147b3f6 | 792 | * expanding tabs, and handling the CR/NL bit. |
becb115c SL |
793 | * This is called both from the top half for output, |
794 | * and from interrupt level for echoing. | |
4147b3f6 BJ |
795 | * The arguments are the character and the tty structure. |
796 | * Returns < 0 if putc succeeds, otherwise returns char to resend | |
797 | * Must be recursive. | |
798 | */ | |
799 | ttyoutput(c, tp) | |
800 | register c; | |
801 | register struct tty *tp; | |
802 | { | |
803 | register char *colp; | |
804 | register ctype; | |
805 | ||
becb115c SL |
806 | if (tp->t_flags & (RAW|LITOUT)) { |
807 | if (tp->t_flags&FLUSHO) | |
4147b3f6 BJ |
808 | return (-1); |
809 | if (putc(c, &tp->t_outq)) | |
4b72e2f9 | 810 | return (c); |
4147b3f6 BJ |
811 | tk_nout++; |
812 | return (-1); | |
813 | } | |
becb115c | 814 | |
4147b3f6 | 815 | /* |
becb115c SL |
816 | * Ignore EOT in normal mode to avoid |
817 | * hanging up certain terminals. | |
4147b3f6 BJ |
818 | */ |
819 | c &= 0177; | |
becb115c | 820 | if (c == CEOT && (tp->t_flags&CBREAK) == 0) |
4147b3f6 BJ |
821 | return (-1); |
822 | /* | |
823 | * Turn tabs to spaces as required | |
824 | */ | |
becb115c | 825 | if (c == '\t' && (tp->t_flags&TBDELAY) == XTABS) { |
4147b3f6 BJ |
826 | register int s; |
827 | ||
828 | c = 8 - (tp->t_col&7); | |
becb115c | 829 | if ((tp->t_flags&FLUSHO) == 0) { |
4147b3f6 BJ |
830 | s = spl5(); /* don't interrupt tabs */ |
831 | c -= b_to_q(" ", c, &tp->t_outq); | |
832 | tk_nout += c; | |
833 | splx(s); | |
834 | } | |
835 | tp->t_col += c; | |
836 | return (c ? -1 : '\t'); | |
837 | } | |
838 | tk_nout++; | |
839 | /* | |
840 | * for upper-case-only terminals, | |
841 | * generate escapes. | |
842 | */ | |
843 | if (tp->t_flags&LCASE) { | |
844 | colp = "({)}!|^~'`"; | |
4b72e2f9 SL |
845 | while (*colp++) |
846 | if (c == *colp++) { | |
4147b3f6 BJ |
847 | if (ttyoutput('\\', tp) >= 0) |
848 | return (c); | |
849 | c = colp[-2]; | |
850 | break; | |
851 | } | |
becb115c | 852 | if ('A' <= c && c <= 'Z') { |
4147b3f6 BJ |
853 | if (ttyoutput('\\', tp) >= 0) |
854 | return (c); | |
becb115c | 855 | } else if ('a' <= c && c <= 'z') |
4147b3f6 BJ |
856 | c += 'A' - 'a'; |
857 | } | |
becb115c | 858 | |
4147b3f6 BJ |
859 | /* |
860 | * turn <nl> to <cr><lf> if desired. | |
861 | */ | |
becb115c | 862 | if (c == '\n' && tp->t_flags&CRMOD) |
4147b3f6 BJ |
863 | if (ttyoutput('\r', tp) >= 0) |
864 | return (c); | |
becb115c | 865 | if (c == '~' && tp->t_flags&TILDE) |
4147b3f6 | 866 | c = '`'; |
becb115c | 867 | if ((tp->t_flags&FLUSHO) == 0 && putc(c, &tp->t_outq)) |
4147b3f6 BJ |
868 | return (c); |
869 | /* | |
870 | * Calculate delays. | |
871 | * The numbers here represent clock ticks | |
872 | * and are not necessarily optimal for all terminals. | |
873 | * The delays are indicated by characters above 0200. | |
874 | * In raw mode there are no delays and the | |
875 | * transmission path is 8 bits wide. | |
becb115c SL |
876 | * |
877 | * SHOULD JUST ALLOW USER TO SPECIFY DELAYS | |
4147b3f6 BJ |
878 | */ |
879 | colp = &tp->t_col; | |
880 | ctype = partab[c]; | |
881 | c = 0; | |
882 | switch (ctype&077) { | |
883 | ||
884 | case ORDINARY: | |
885 | (*colp)++; | |
886 | ||
887 | case CONTROL: | |
888 | break; | |
889 | ||
890 | case BACKSPACE: | |
891 | if (*colp) | |
892 | (*colp)--; | |
893 | break; | |
894 | ||
895 | case NEWLINE: | |
896 | ctype = (tp->t_flags >> 8) & 03; | |
4b72e2f9 | 897 | if (ctype == 1) { /* tty 37 */ |
4147b3f6 BJ |
898 | if (*colp) |
899 | c = max(((unsigned)*colp>>4) + 3, (unsigned)6); | |
becb115c | 900 | } else if (ctype == 2) /* vt05 */ |
4147b3f6 | 901 | c = 6; |
4147b3f6 BJ |
902 | *colp = 0; |
903 | break; | |
904 | ||
905 | case TAB: | |
906 | ctype = (tp->t_flags >> 10) & 03; | |
4b72e2f9 | 907 | if (ctype == 1) { /* tty 37 */ |
4147b3f6 | 908 | c = 1 - (*colp | ~07); |
4b72e2f9 | 909 | if (c < 5) |
4147b3f6 BJ |
910 | c = 0; |
911 | } | |
912 | *colp |= 07; | |
913 | (*colp)++; | |
914 | break; | |
915 | ||
916 | case VTAB: | |
becb115c | 917 | if (tp->t_flags&VTDELAY) /* tty 37 */ |
4147b3f6 BJ |
918 | c = 0177; |
919 | break; | |
920 | ||
921 | case RETURN: | |
922 | ctype = (tp->t_flags >> 12) & 03; | |
becb115c | 923 | if (ctype == 1) /* tn 300 */ |
4147b3f6 | 924 | c = 5; |
becb115c | 925 | else if (ctype == 2) /* ti 700 */ |
4147b3f6 | 926 | c = 10; |
becb115c | 927 | else if (ctype == 3) { /* concept 100 */ |
4147b3f6 | 928 | int i; |
becb115c | 929 | |
4147b3f6 | 930 | if ((i = *colp) >= 0) |
becb115c | 931 | for (; i < 9; i++) |
4147b3f6 BJ |
932 | (void) putc(0177, &tp->t_outq); |
933 | } | |
934 | *colp = 0; | |
935 | } | |
becb115c | 936 | if (c && (tp->t_flags&FLUSHO) == 0) |
4147b3f6 BJ |
937 | (void) putc(c|0200, &tp->t_outq); |
938 | return (-1); | |
939 | } | |
940 | ||
941 | /* | |
942 | * Called from device's read routine after it has | |
943 | * calculated the tty-structure given as argument. | |
944 | */ | |
d6d7360b | 945 | ttread(tp, uio) |
4b72e2f9 | 946 | register struct tty *tp; |
d6d7360b | 947 | struct uio *uio; |
4147b3f6 BJ |
948 | { |
949 | register struct clist *qp; | |
becb115c SL |
950 | register c, t_flags; |
951 | int first, error = 0; | |
4147b3f6 BJ |
952 | |
953 | if ((tp->t_state&TS_CARR_ON)==0) | |
840510a3 | 954 | return (EIO); |
4147b3f6 | 955 | loop: |
becb115c SL |
956 | /* |
957 | * Take any pending input first. | |
958 | */ | |
4147b3f6 | 959 | (void) spl5(); |
becb115c | 960 | if (tp->t_flags&PENDIN) |
4147b3f6 BJ |
961 | ttypend(tp); |
962 | (void) spl0(); | |
becb115c SL |
963 | |
964 | /* | |
965 | * Hang process if it's in the background. | |
966 | */ | |
4147b3f6 BJ |
967 | while (tp == u.u_ttyp && u.u_procp->p_pgrp != tp->t_pgrp) { |
968 | if (u.u_signal[SIGTTIN] == SIG_IGN || | |
969 | u.u_signal[SIGTTIN] == SIG_HOLD || | |
970 | /* | |
971 | (u.u_procp->p_flag&SDETACH) || | |
972 | */ | |
973 | u.u_procp->p_flag&SVFORK) | |
840510a3 | 974 | return (EIO); |
4147b3f6 BJ |
975 | gsignal(u.u_procp->p_pgrp, SIGTTIN); |
976 | sleep((caddr_t)&lbolt, TTIPRI); | |
977 | } | |
becb115c SL |
978 | t_flags = tp->t_flags; |
979 | ||
980 | /* | |
981 | * In raw mode take characters directly from the | |
982 | * raw queue w/o processing. Interlock against | |
983 | * device interrupts when interrogating rawq. | |
984 | */ | |
985 | if (t_flags&RAW) { | |
4147b3f6 BJ |
986 | (void) spl5(); |
987 | if (tp->t_rawq.c_cc <= 0) { | |
becb115c | 988 | if ((tp->t_state&TS_CARR_ON) == 0 || |
4147b3f6 BJ |
989 | (tp->t_state&TS_NBIO)) { |
990 | (void) spl0(); | |
becb115c | 991 | return (0); |
4147b3f6 BJ |
992 | } |
993 | sleep((caddr_t)&tp->t_rawq, TTIPRI); | |
994 | (void) spl0(); | |
995 | goto loop; | |
996 | } | |
997 | (void) spl0(); | |
d6d7360b | 998 | while (tp->t_rawq.c_cc && uio->uio_iovcnt) { |
840510a3 BJ |
999 | error = passuc(getc(&tp->t_rawq), uio); |
1000 | if (error) | |
d6d7360b BJ |
1001 | break; |
1002 | } | |
840510a3 | 1003 | return (error); |
becb115c SL |
1004 | } |
1005 | ||
1006 | /* | |
1007 | * In cbreak mode use the rawq, otherwise | |
1008 | * take characters from the canonicalized q. | |
1009 | */ | |
1010 | qp = t_flags&CBREAK ? &tp->t_rawq : &tp->t_canq; | |
1011 | ||
1012 | /* | |
1013 | * No input, sleep on rawq awaiting hardware | |
1014 | * receipt and notification. | |
1015 | */ | |
1016 | (void) spl5(); | |
1017 | if (qp->c_cc <= 0) { | |
1018 | if ((tp->t_state&TS_CARR_ON) == 0 || | |
1019 | (tp->t_state&TS_NBIO)) { | |
4147b3f6 | 1020 | (void) spl0(); |
becb115c | 1021 | return (EWOULDBLOCK); |
4147b3f6 | 1022 | } |
becb115c | 1023 | sleep((caddr_t)&tp->t_rawq, TTIPRI); |
4147b3f6 | 1024 | (void) spl0(); |
becb115c SL |
1025 | goto loop; |
1026 | } | |
1027 | (void) spl0(); | |
1028 | ||
1029 | /* | |
1030 | * Input present, perform input mapping | |
1031 | * and processing (we're not in raw mode). | |
1032 | */ | |
1033 | first = 1; | |
1034 | while ((c = getc(qp)) >= 0) { | |
1035 | if (t_flags&CRMOD && c == '\r') | |
1036 | c = '\n'; | |
1037 | /* | |
1038 | * Hack lower case simulation on | |
1039 | * upper case only terminals. | |
1040 | */ | |
1041 | if (t_flags&LCASE && c <= 0177) | |
1042 | if (tp->t_state&TS_BKSL) { | |
1043 | if (maptab[c]) | |
1044 | c = maptab[c]; | |
1045 | tp->t_state &= ~TS_BKSL; | |
1046 | } else if (c >= 'A' && c <= 'Z') | |
1047 | c += 'a' - 'A'; | |
1048 | else if (c == '\\') { | |
1049 | tp->t_state |= TS_BKSL; | |
1050 | continue; | |
4147b3f6 | 1051 | } |
becb115c SL |
1052 | /* |
1053 | * Check for delayed suspend character. | |
1054 | */ | |
1055 | if (tp->t_line == NTTYDISC && c == tp->t_dsuspc) { | |
1056 | gsignal(tp->t_pgrp, SIGTSTP); | |
1057 | if (first) { | |
1058 | sleep((caddr_t)&lbolt, TTIPRI); | |
1059 | goto loop; | |
1060 | } | |
1061 | break; | |
4147b3f6 | 1062 | } |
becb115c SL |
1063 | /* |
1064 | * Interpret EOF only in cooked mode. | |
1065 | */ | |
1066 | if (c == tp->t_eofc && (t_flags&CBREAK) == 0) | |
1067 | break; | |
1068 | /* | |
1069 | * Give user character. | |
1070 | */ | |
1071 | error = passuc(c & 0177, uio); | |
1072 | if (error) | |
1073 | break; | |
1074 | if (uio->uio_iovcnt == 0) | |
1075 | break; | |
1076 | /* | |
1077 | * In cooked mode check for a "break character" | |
1078 | * marking the end of a "line of input". | |
1079 | */ | |
1080 | if ((t_flags&CBREAK) == 0 && ttbreakc(c, tp)) | |
1081 | break; | |
1082 | first = 0; | |
4147b3f6 | 1083 | } |
becb115c SL |
1084 | tp->t_state &= ~TS_BKSL; |
1085 | ||
1086 | /* | |
1087 | * Look to unblock output now that (presumably) | |
1088 | * the input queue has gone down. | |
1089 | */ | |
4147b3f6 | 1090 | if (tp->t_state&TS_TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) { |
becb115c | 1091 | if (putc(tp->t_startc, &tp->t_outq) == 0) { |
4147b3f6 BJ |
1092 | tp->t_state &= ~TS_TBLOCK; |
1093 | ttstart(tp); | |
1094 | } | |
1095 | tp->t_char = 0; | |
1096 | } | |
840510a3 | 1097 | return (error); |
4147b3f6 BJ |
1098 | } |
1099 | ||
1100 | /* | |
1101 | * Called from the device's write routine after it has | |
1102 | * calculated the tty-structure given as argument. | |
1103 | */ | |
913ea2d1 | 1104 | ttwrite(tp, uio) |
4b72e2f9 | 1105 | register struct tty *tp; |
becb115c | 1106 | register struct uio *uio; |
4147b3f6 | 1107 | { |
4147b3f6 | 1108 | register char *cp; |
becb115c SL |
1109 | register int cc, ce, c; |
1110 | int i, hiwat, cnt, error, s; | |
4147b3f6 | 1111 | char obuf[OBUFSIZ]; |
4147b3f6 | 1112 | |
becb115c | 1113 | if ((tp->t_state&TS_CARR_ON) == 0) |
840510a3 | 1114 | return (EIO); |
becb115c SL |
1115 | hiwat = TTHIWAT(tp); |
1116 | cnt = uio->uio_resid; | |
1117 | error = 0; | |
4147b3f6 | 1118 | loop: |
becb115c SL |
1119 | /* |
1120 | * Hang the process if it's in the background. | |
1121 | */ | |
4147b3f6 | 1122 | while (u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && |
becb115c | 1123 | (tp->t_flags&TOSTOP) && (u.u_procp->p_flag&SVFORK)==0 && |
4147b3f6 BJ |
1124 | u.u_signal[SIGTTOU] != SIG_IGN && |
1125 | u.u_signal[SIGTTOU] != SIG_HOLD | |
1126 | /* | |
1127 | && | |
1128 | (u.u_procp->p_flag&SDETACH)==0) { | |
1129 | */ | |
1130 | ) { | |
1131 | gsignal(u.u_procp->p_pgrp, SIGTTOU); | |
1132 | sleep((caddr_t)&lbolt, TTIPRI); | |
1133 | } | |
becb115c SL |
1134 | |
1135 | /* | |
1136 | * Process the user's data in at most OBUFSIZ | |
1137 | * chunks. Perform lower case simulation and | |
1138 | * similar hacks. Keep track of high water | |
1139 | * mark, sleep on overflow awaiting device aid | |
1140 | * in acquiring new space. | |
1141 | */ | |
913ea2d1 | 1142 | while (uio->uio_resid > 0) { |
becb115c SL |
1143 | /* |
1144 | * Grab a hunk of data from the user. | |
1145 | */ | |
913ea2d1 BJ |
1146 | cc = uio->uio_iov->iov_len; |
1147 | if (cc == 0) { | |
1148 | uio->uio_iovcnt--; | |
1149 | uio->uio_iov++; | |
1150 | if (uio->uio_iovcnt < 0) | |
1151 | panic("ttwrite"); | |
1152 | continue; | |
1153 | } | |
1154 | if (cc > OBUFSIZ) | |
1155 | cc = OBUFSIZ; | |
4147b3f6 | 1156 | cp = obuf; |
becb115c | 1157 | error = uiomove(cp, (unsigned)cc, UIO_WRITE, uio); |
840510a3 | 1158 | if (error) |
4147b3f6 BJ |
1159 | break; |
1160 | if (tp->t_outq.c_cc > hiwat) | |
1161 | goto ovhiwat; | |
becb115c | 1162 | if (tp->t_flags&FLUSHO) |
4147b3f6 | 1163 | continue; |
becb115c SL |
1164 | /* |
1165 | * If we're mapping lower case or kludging tildes, | |
1166 | * then we've got to look at each character, so | |
1167 | * just feed the stuff to ttyoutput... | |
1168 | */ | |
1169 | if (tp->t_flags & (LCASE|TILDE)) { | |
1170 | while (cc > 0) { | |
4147b3f6 BJ |
1171 | c = *cp++; |
1172 | tp->t_rocount = 0; | |
4b72e2f9 | 1173 | while ((c = ttyoutput(c, tp)) >= 0) { |
4147b3f6 BJ |
1174 | /* out of clists, wait a bit */ |
1175 | ttstart(tp); | |
1176 | sleep((caddr_t)&lbolt, TTOPRI); | |
1177 | tp->t_rocount = 0; | |
1178 | } | |
1179 | --cc; | |
1180 | if (tp->t_outq.c_cc > hiwat) | |
1181 | goto ovhiwat; | |
1182 | } | |
1183 | continue; | |
1184 | } | |
becb115c SL |
1185 | /* |
1186 | * If nothing fancy need be done, grab those characters we | |
1187 | * can handle without any of ttyoutput's processing and | |
1188 | * just transfer them to the output q. For those chars | |
1189 | * which require special processing (as indicated by the | |
1190 | * bits in partab), call ttyoutput. After processing | |
1191 | * a hunk of data, look for FLUSHO so ^O's will take effect | |
1192 | * immediately. | |
1193 | */ | |
1194 | while (cc > 0) { | |
1195 | if (tp->t_flags & (RAW|LITOUT)) | |
4147b3f6 BJ |
1196 | ce = cc; |
1197 | else { | |
becb115c SL |
1198 | ce = cc - scanc(cc, cp, partab, 077); |
1199 | /* | |
1200 | * If ce is zero, then we're processing | |
1201 | * a special character through ttyoutput. | |
1202 | */ | |
1203 | if (ce == 0) { | |
4147b3f6 BJ |
1204 | tp->t_rocount = 0; |
1205 | if (ttyoutput(*cp, tp) >= 0) { | |
becb115c | 1206 | /* no c-lists, wait a bit */ |
4147b3f6 BJ |
1207 | ttstart(tp); |
1208 | sleep((caddr_t)&lbolt, TTOPRI); | |
1209 | continue; | |
1210 | } | |
becb115c SL |
1211 | cp++, cc--; |
1212 | if (tp->t_flags&FLUSHO || | |
1213 | tp->t_outq.c_cc > hiwat) | |
4147b3f6 | 1214 | goto ovhiwat; |
becb115c | 1215 | continue; |
4147b3f6 BJ |
1216 | } |
1217 | } | |
becb115c SL |
1218 | /* |
1219 | * A bunch of normal characters have been found, | |
1220 | * transfer them en masse to the output queue and | |
1221 | * continue processing at the top of the loop. | |
1222 | * If there are any further characters in this | |
1223 | * <= OBUFSIZ chunk, the first should be a character | |
1224 | * requiring special handling by ttyoutput. | |
1225 | */ | |
4147b3f6 | 1226 | tp->t_rocount = 0; |
becb115c SL |
1227 | i = b_to_q(cp, ce, &tp->t_outq); |
1228 | ce -= i; | |
1229 | tp->t_col += ce; | |
1230 | cp += ce, cc -= ce, tk_nout += ce; | |
1231 | if (i > 0) { | |
1232 | /* out of c-lists, wait a bit */ | |
4147b3f6 BJ |
1233 | ttstart(tp); |
1234 | sleep((caddr_t)&lbolt, TTOPRI); | |
1235 | } | |
becb115c | 1236 | if (tp->t_flags&FLUSHO || tp->t_outq.c_cc > hiwat) |
4147b3f6 BJ |
1237 | goto ovhiwat; |
1238 | } | |
1239 | } | |
1240 | ttstart(tp); | |
840510a3 | 1241 | return (error); |
4147b3f6 BJ |
1242 | |
1243 | ovhiwat: | |
becb115c SL |
1244 | s = spl5(); |
1245 | if (cc != 0) { | |
1246 | uio->uio_iov->iov_base -= cc; | |
1247 | uio->uio_iov->iov_len += cc; | |
1248 | uio->uio_resid += cc; | |
1249 | uio->uio_offset -= cc; | |
1250 | } | |
1251 | /* | |
1252 | * This can only occur if FLUSHO | |
1253 | * is also set in t_flags. | |
1254 | */ | |
4147b3f6 | 1255 | if (tp->t_outq.c_cc <= hiwat) { |
becb115c | 1256 | splx(s); |
4147b3f6 BJ |
1257 | goto loop; |
1258 | } | |
1259 | ttstart(tp); | |
becb115c | 1260 | if (tp->t_state&TS_NBIO) { |
913ea2d1 | 1261 | if (uio->uio_resid == cnt) |
840510a3 BJ |
1262 | return (EWOULDBLOCK); |
1263 | return (0); | |
4147b3f6 BJ |
1264 | } |
1265 | tp->t_state |= TS_ASLEEP; | |
1266 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
becb115c | 1267 | splx(s); |
4147b3f6 BJ |
1268 | goto loop; |
1269 | } | |
1270 | ||
1271 | /* | |
1272 | * Rubout one character from the rawq of tp | |
1273 | * as cleanly as possible. | |
1274 | */ | |
1275 | ttyrub(c, tp) | |
4b72e2f9 SL |
1276 | register c; |
1277 | register struct tty *tp; | |
4147b3f6 BJ |
1278 | { |
1279 | register char *cp; | |
1280 | register int savecol; | |
1281 | int s; | |
1282 | char *nextc(); | |
1283 | ||
becb115c | 1284 | if ((tp->t_flags&ECHO) == 0) |
4147b3f6 | 1285 | return; |
becb115c | 1286 | tp->t_flags &= ~FLUSHO; |
4147b3f6 | 1287 | c &= 0377; |
becb115c | 1288 | if (tp->t_flags&CRTBS) { |
4147b3f6 BJ |
1289 | if (tp->t_rocount == 0) { |
1290 | /* | |
1291 | * Screwed by ttwrite; retype | |
1292 | */ | |
1293 | ttyretype(tp); | |
1294 | return; | |
1295 | } | |
becb115c | 1296 | if (c == ('\t'|0200) || c == ('\n'|0200)) |
4147b3f6 | 1297 | ttyrubo(tp, 2); |
becb115c | 1298 | else switch (partab[c&=0177]&0177) { |
4147b3f6 BJ |
1299 | |
1300 | case ORDINARY: | |
1301 | if (tp->t_flags&LCASE && c >= 'A' && c <= 'Z') | |
1302 | ttyrubo(tp, 2); | |
1303 | else | |
1304 | ttyrubo(tp, 1); | |
1305 | break; | |
1306 | ||
1307 | case VTAB: | |
1308 | case BACKSPACE: | |
1309 | case CONTROL: | |
1310 | case RETURN: | |
becb115c | 1311 | if (tp->t_flags&CTLECH) |
4147b3f6 BJ |
1312 | ttyrubo(tp, 2); |
1313 | break; | |
1314 | ||
1315 | case TAB: | |
1316 | if (tp->t_rocount < tp->t_rawq.c_cc) { | |
1317 | ttyretype(tp); | |
1318 | return; | |
1319 | } | |
1320 | s = spl5(); | |
1321 | savecol = tp->t_col; | |
becb115c SL |
1322 | tp->t_state |= TS_CNTTB; |
1323 | tp->t_flags |= FLUSHO; | |
4147b3f6 | 1324 | tp->t_col = tp->t_rocol; |
becb115c SL |
1325 | cp = tp->t_rawq.c_cf; |
1326 | for (; cp; cp = nextc(&tp->t_rawq, cp)) | |
4147b3f6 | 1327 | ttyecho(*cp, tp); |
becb115c SL |
1328 | tp->t_flags &= ~FLUSHO; |
1329 | tp->t_state &= ~TS_CNTTB; | |
4147b3f6 BJ |
1330 | splx(s); |
1331 | /* | |
1332 | * savecol will now be length of the tab | |
1333 | */ | |
1334 | savecol -= tp->t_col; | |
1335 | tp->t_col += savecol; | |
1336 | if (savecol > 8) | |
1337 | savecol = 8; /* overflow screw */ | |
1338 | while (--savecol >= 0) | |
1339 | (void) ttyoutput('\b', tp); | |
1340 | break; | |
1341 | ||
1342 | default: | |
1343 | panic("ttyrub"); | |
1344 | } | |
becb115c SL |
1345 | } else if (tp->t_flags&PRTERA) { |
1346 | if ((tp->t_state&TS_ERASE) == 0) { | |
4147b3f6 | 1347 | (void) ttyoutput('\\', tp); |
becb115c | 1348 | tp->t_state |= TS_ERASE; |
4147b3f6 BJ |
1349 | } |
1350 | ttyecho(c, tp); | |
1351 | } else | |
1352 | ttyecho(tp->t_erase, tp); | |
1353 | tp->t_rocount--; | |
1354 | } | |
1355 | ||
1356 | /* | |
1357 | * Crt back over cnt chars perhaps | |
1358 | * erasing them. | |
1359 | */ | |
1360 | ttyrubo(tp, cnt) | |
4b72e2f9 SL |
1361 | register struct tty *tp; |
1362 | int cnt; | |
4147b3f6 | 1363 | { |
becb115c | 1364 | register char *rubostring = tp->t_flags&CRTERA ? "\b \b" : "\b"; |
4147b3f6 BJ |
1365 | |
1366 | while (--cnt >= 0) | |
becb115c | 1367 | ttyout(rubostring, tp); |
4147b3f6 BJ |
1368 | } |
1369 | ||
1370 | /* | |
1371 | * Reprint the rawq line. | |
1372 | * We assume c_cc has already been checked. | |
1373 | */ | |
1374 | ttyretype(tp) | |
4b72e2f9 | 1375 | register struct tty *tp; |
4147b3f6 BJ |
1376 | { |
1377 | register char *cp; | |
1378 | char *nextc(); | |
1379 | int s; | |
1380 | ||
becb115c SL |
1381 | if (tp->t_rprntc != 0377) |
1382 | ttyecho(tp->t_rprntc, tp); | |
4147b3f6 BJ |
1383 | (void) ttyoutput('\n', tp); |
1384 | s = spl5(); | |
1385 | for (cp = tp->t_canq.c_cf; cp; cp = nextc(&tp->t_canq, cp)) | |
1386 | ttyecho(*cp, tp); | |
1387 | for (cp = tp->t_rawq.c_cf; cp; cp = nextc(&tp->t_rawq, cp)) | |
1388 | ttyecho(*cp, tp); | |
becb115c | 1389 | tp->t_state &= ~TS_ERASE; |
4147b3f6 BJ |
1390 | splx(s); |
1391 | tp->t_rocount = tp->t_rawq.c_cc; | |
1392 | tp->t_rocol = 0; | |
1393 | } | |
1394 | ||
1395 | /* | |
1396 | * Echo a typed character to the terminal | |
1397 | */ | |
1398 | ttyecho(c, tp) | |
4b72e2f9 SL |
1399 | register c; |
1400 | register struct tty *tp; | |
4147b3f6 BJ |
1401 | { |
1402 | ||
becb115c SL |
1403 | if ((tp->t_state&TS_CNTTB) == 0) |
1404 | tp->t_flags &= ~FLUSHO; | |
4147b3f6 BJ |
1405 | if ((tp->t_flags&ECHO) == 0) |
1406 | return; | |
1407 | c &= 0377; | |
1408 | if (tp->t_flags&RAW) { | |
1409 | (void) ttyoutput(c, tp); | |
1410 | return; | |
1411 | } | |
1412 | if (c == '\r' && tp->t_flags&CRMOD) | |
1413 | c = '\n'; | |
becb115c | 1414 | if (tp->t_flags&CTLECH) { |
4147b3f6 BJ |
1415 | if ((c&0177) <= 037 && c!='\t' && c!='\n' || (c&0177)==0177) { |
1416 | (void) ttyoutput('^', tp); | |
1417 | c &= 0177; | |
1418 | if (c == 0177) | |
1419 | c = '?'; | |
1420 | else if (tp->t_flags&LCASE) | |
1421 | c += 'a' - 1; | |
1422 | else | |
1423 | c += 'A' - 1; | |
1424 | } | |
1425 | } | |
1426 | if ((tp->t_flags&LCASE) && (c >= 'A' && c <= 'Z')) | |
1427 | c += 'a' - 'A'; | |
becb115c | 1428 | (void) ttyoutput(c&0177, tp); |
4147b3f6 BJ |
1429 | } |
1430 | ||
1431 | /* | |
1432 | * Is c a break char for tp? | |
1433 | */ | |
1434 | ttbreakc(c, tp) | |
4b72e2f9 SL |
1435 | register c; |
1436 | register struct tty *tp; | |
4147b3f6 | 1437 | { |
becb115c | 1438 | return (c == '\n' || c == tp->t_eofc || c == tp->t_brkc || |
4147b3f6 BJ |
1439 | c == '\r' && (tp->t_flags&CRMOD)); |
1440 | } | |
1441 | ||
1442 | /* | |
1443 | * send string cp to tp | |
1444 | */ | |
1445 | ttyout(cp, tp) | |
4b72e2f9 SL |
1446 | register char *cp; |
1447 | register struct tty *tp; | |
4147b3f6 BJ |
1448 | { |
1449 | register char c; | |
1450 | ||
1451 | while (c = *cp++) | |
1452 | (void) ttyoutput(c, tp); | |
1453 | } | |
1454 | ||
1455 | ttwakeup(tp) | |
1456 | struct tty *tp; | |
1457 | { | |
1458 | ||
1459 | if (tp->t_rsel) { | |
1460 | selwakeup(tp->t_rsel, tp->t_state&TS_RCOLL); | |
1461 | tp->t_state &= ~TS_RCOLL; | |
1462 | tp->t_rsel = 0; | |
1463 | } | |
1464 | wakeup((caddr_t)&tp->t_rawq); | |
1465 | } | |
1466 | ||
becb115c SL |
1467 | #ifndef vax |
1468 | scanc(size, cp, table, mask) | |
1469 | register int size; | |
1470 | register char *cp, table[]; | |
1471 | register int mask; | |
4147b3f6 | 1472 | { |
becb115c | 1473 | register int i = 0; |
4147b3f6 | 1474 | |
becb115c SL |
1475 | while ((table[*(u_char *)(cp + i)]&mask) == 0 && i < size) |
1476 | i++; | |
1477 | return (i); | |
4147b3f6 | 1478 | } |
becb115c | 1479 | #endif |