Commit | Line | Data |
---|---|---|
840510a3 | 1 | /* tty.c 4.30 82/10/13 */ |
89dc6dfb BJ |
2 | |
3 | /* | |
50e2732b | 4 | * TTY subroutines common to more than one line discipline |
89dc6dfb BJ |
5 | */ |
6 | #include "../h/param.h" | |
7 | #include "../h/systm.h" | |
8 | #include "../h/dir.h" | |
9 | #include "../h/user.h" | |
10 | #include "../h/tty.h" | |
11 | #include "../h/proc.h" | |
89dc6dfb BJ |
12 | #include "../h/inode.h" |
13 | #include "../h/file.h" | |
14 | #include "../h/reg.h" | |
15 | #include "../h/conf.h" | |
16 | #include "../h/buf.h" | |
d1778415 | 17 | #include "../h/dk.h" |
d6d7360b | 18 | #include "../h/uio.h" |
894cfdb7 | 19 | #include "../h/kernel.h" |
89dc6dfb | 20 | |
8bba2b8f RE |
21 | /* |
22 | * Table giving parity for characters and indicating | |
23 | * character classes to tty driver. In particular, | |
24 | * if the low 6 bits are 0, then the character needs | |
25 | * no special processing on output. | |
26 | */ | |
27 | ||
28 | char partab[] = { | |
29 | 0001,0201,0201,0001,0201,0001,0001,0201, | |
30 | 0202,0004,0003,0201,0005,0206,0201,0001, | |
31 | 0201,0001,0001,0201,0001,0201,0201,0001, | |
32 | 0001,0201,0201,0001,0201,0001,0001,0201, | |
33 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
34 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
35 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
36 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
37 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
38 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
39 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
40 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
41 | 0000,0200,0200,0000,0200,0000,0000,0200, | |
42 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
43 | 0200,0000,0000,0200,0000,0200,0200,0000, | |
44 | 0000,0200,0200,0000,0200,0000,0000,0201, | |
45 | ||
46 | /* | |
47 | * 7 bit ascii ends with the last character above, | |
48 | * but we contine through all 256 codes for the sake | |
49 | * of the tty output routines which use special vax | |
50 | * instructions which need a 256 character trt table. | |
51 | */ | |
52 | ||
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 | 0007,0007,0007,0007,0007,0007,0007,0007 | |
69 | }; | |
89dc6dfb | 70 | |
89dc6dfb BJ |
71 | /* |
72 | * Input mapping table-- if an entry is non-zero, when the | |
73 | * corresponding character is typed preceded by "\" the escape | |
74 | * sequence is replaced by the table value. Mostly used for | |
75 | * upper-case only terminals. | |
76 | */ | |
77 | ||
78 | char maptab[] ={ | |
79 | 000,000,000,000,000,000,000,000, | |
80 | 000,000,000,000,000,000,000,000, | |
81 | 000,000,000,000,000,000,000,000, | |
82 | 000,000,000,000,000,000,000,000, | |
83 | 000,'|',000,000,000,000,000,'`', | |
84 | '{','}',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 | 000,000,000,000,000,000,000,000, | |
89 | 000,000,000,000,000,000,000,000, | |
90 | 000,000,000,000,000,000,'~',000, | |
91 | 000,'A','B','C','D','E','F','G', | |
92 | 'H','I','J','K','L','M','N','O', | |
93 | 'P','Q','R','S','T','U','V','W', | |
94 | 'X','Y','Z',000,000,000,000,000, | |
95 | }; | |
96 | ||
0d65848d BJ |
97 | short tthiwat[16] = |
98 | { 100,100,100,100,100,100,100,200,200,400,400,400,650,650,650,650 }; | |
99 | short ttlowat[16] = | |
100 | { 30, 30, 30, 30, 30, 30, 30, 50, 50,120,120,120,125,125,125,125 }; | |
101 | ||
89dc6dfb BJ |
102 | #define OBUFSIZ 100 |
103 | ||
89dc6dfb BJ |
104 | /* |
105 | * set default control characters. | |
106 | */ | |
107 | ttychars(tp) | |
4b72e2f9 | 108 | register struct tty *tp; |
89dc6dfb | 109 | { |
8062c8a7 | 110 | |
89dc6dfb BJ |
111 | tun.t_intrc = CINTR; |
112 | tun.t_quitc = CQUIT; | |
113 | tun.t_startc = CSTART; | |
114 | tun.t_stopc = CSTOP; | |
115 | tun.t_eofc = CEOT; | |
116 | tun.t_brkc = CBRK; | |
117 | tp->t_erase = CERASE; | |
118 | tp->t_kill = CKILL; | |
8062c8a7 | 119 | /* begin local */ |
6fdc0335 BJ |
120 | tlun.t_suspc = CTRL(z); |
121 | tlun.t_dsuspc = CTRL(y); | |
8062c8a7 BJ |
122 | tlun.t_rprntc = CTRL(r); |
123 | tlun.t_flushc = CTRL(o); | |
124 | tlun.t_werasc = CTRL(w); | |
125 | tlun.t_lnextc = CTRL(v); | |
8062c8a7 BJ |
126 | tp->t_local = 0; |
127 | tp->t_lstate = 0; | |
128 | /* end local */ | |
89dc6dfb BJ |
129 | } |
130 | ||
131 | /* | |
50e2732b | 132 | * Wait for output to drain, then flush input waiting. |
89dc6dfb | 133 | */ |
50e2732b | 134 | wflushtty(tp) |
941944c9 | 135 | register struct tty *tp; |
89dc6dfb BJ |
136 | { |
137 | ||
50e2732b | 138 | (void) spl5(); |
4c67f645 BJ |
139 | while (tp->t_outq.c_cc && tp->t_state&TS_CARR_ON |
140 | && tp->t_oproc) { /* kludge for pty */ | |
50e2732b | 141 | (*tp->t_oproc)(tp); |
941944c9 | 142 | tp->t_state |= TS_ASLEEP; |
50e2732b BJ |
143 | sleep((caddr_t)&tp->t_outq, TTOPRI); |
144 | } | |
39697bd8 | 145 | flushtty(tp, FREAD); |
50e2732b | 146 | (void) spl0(); |
89dc6dfb BJ |
147 | } |
148 | ||
149 | /* | |
50e2732b | 150 | * flush all TTY queues |
89dc6dfb | 151 | */ |
50e2732b | 152 | flushtty(tp, rw) |
4b72e2f9 | 153 | register struct tty *tp; |
89dc6dfb | 154 | { |
50e2732b BJ |
155 | register s; |
156 | ||
50e2732b BJ |
157 | s = spl6(); |
158 | if (rw & FREAD) { | |
159 | while (getc(&tp->t_canq) >= 0) | |
160 | ; | |
161 | wakeup((caddr_t)&tp->t_rawq); | |
162 | } | |
163 | if (rw & FWRITE) { | |
164 | wakeup((caddr_t)&tp->t_outq); | |
941944c9 | 165 | tp->t_state &= ~TS_TTSTOP; |
39697bd8 | 166 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, rw); |
50e2732b BJ |
167 | while (getc(&tp->t_outq) >= 0) |
168 | ; | |
169 | } | |
170 | if (rw & FREAD) { | |
171 | while (getc(&tp->t_rawq) >= 0) | |
172 | ; | |
173 | tp->t_delct = 0; | |
174 | tp->t_rocount = 0; /* local */ | |
175 | tp->t_rocol = 0; | |
176 | tp->t_lstate = 0; | |
177 | } | |
178 | splx(s); | |
89dc6dfb BJ |
179 | } |
180 | ||
50e2732b BJ |
181 | /* |
182 | * Send stop character on input overflow. | |
183 | */ | |
184 | ttyblock(tp) | |
4b72e2f9 | 185 | register struct tty *tp; |
89dc6dfb | 186 | { |
50e2732b BJ |
187 | register x; |
188 | x = tp->t_rawq.c_cc + tp->t_canq.c_cc; | |
189 | if (tp->t_rawq.c_cc > TTYHOG) { | |
190 | flushtty(tp, FREAD|FWRITE); | |
941944c9 | 191 | tp->t_state &= ~TS_TBLOCK; |
50e2732b BJ |
192 | } |
193 | if (x >= TTYHOG/2) { | |
194 | if (putc(tun.t_stopc, &tp->t_outq)==0) { | |
941944c9 | 195 | tp->t_state |= TS_TBLOCK; |
50e2732b BJ |
196 | tp->t_char++; |
197 | ttstart(tp); | |
198 | } | |
199 | } | |
89dc6dfb BJ |
200 | } |
201 | ||
101ba270 | 202 | /* |
50e2732b BJ |
203 | * Restart typewriter output following a delay |
204 | * timeout. | |
205 | * The name of the routine is passed to the timeout | |
206 | * subroutine and it is called during a clock interrupt. | |
101ba270 | 207 | */ |
50e2732b | 208 | ttrstrt(tp) |
4b72e2f9 | 209 | register struct tty *tp; |
101ba270 BJ |
210 | { |
211 | ||
545f5350 BJ |
212 | if (tp == 0) { |
213 | printf("ttrstrt: arg was 0!\n"); | |
214 | return; | |
215 | } | |
941944c9 | 216 | tp->t_state &= ~TS_TIMEOUT; |
50e2732b | 217 | ttstart(tp); |
101ba270 BJ |
218 | } |
219 | ||
89dc6dfb | 220 | /* |
50e2732b BJ |
221 | * Start output on the typewriter. It is used from the top half |
222 | * after some characters have been put on the output queue, | |
223 | * from the interrupt routine to transmit the next | |
224 | * character, and after a timeout has finished. | |
89dc6dfb | 225 | */ |
50e2732b | 226 | ttstart(tp) |
4b72e2f9 | 227 | register struct tty *tp; |
89dc6dfb | 228 | { |
50e2732b | 229 | register s; |
8062c8a7 | 230 | |
50e2732b | 231 | s = spl5(); |
4b72e2f9 | 232 | if ((tp->t_state&(TS_TIMEOUT|TS_TTSTOP|TS_BUSY)) == 0 && |
4c67f645 | 233 | tp->t_oproc) /* kludge for pty */ |
50e2732b BJ |
234 | (*tp->t_oproc)(tp); |
235 | splx(s); | |
89dc6dfb BJ |
236 | } |
237 | ||
238 | /* | |
50e2732b | 239 | * Common code for tty ioctls. |
89dc6dfb | 240 | */ |
49c84d3f | 241 | /*ARGSUSED*/ |
4b72e2f9 SL |
242 | ttioctl(tp, com, data, flag) |
243 | register struct tty *tp; | |
244 | caddr_t data; | |
89dc6dfb | 245 | { |
840510a3 | 246 | int dev = tp->t_dev; |
89dc6dfb BJ |
247 | extern int nldisp; |
248 | ||
50e2732b BJ |
249 | /* |
250 | * If the ioctl involves modification, | |
251 | * insist on being able to write the device, | |
252 | * and hang if in the background. | |
253 | */ | |
4b72e2f9 | 254 | switch (com) { |
50e2732b | 255 | |
c6fe3a50 BJ |
256 | case TIOCSETD: |
257 | case TIOCSETP: | |
258 | case TIOCSETN: | |
50e2732b BJ |
259 | case TIOCFLUSH: |
260 | case TIOCSETC: | |
261 | case TIOCSLTC: | |
262 | case TIOCSPGRP: | |
263 | case TIOCLBIS: | |
264 | case TIOCLBIC: | |
265 | case TIOCLSET: | |
c6fe3a50 | 266 | /* this is reasonable, but impractical... |
50e2732b BJ |
267 | if ((flag & FWRITE) == 0) { |
268 | u.u_error = EBADF; | |
269 | return (1); | |
270 | } | |
c6fe3a50 | 271 | */ |
50e2732b BJ |
272 | while (tp->t_line == NTTYDISC && |
273 | u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && | |
274 | (u.u_procp->p_flag&SVFORK) == 0 && | |
275 | u.u_signal[SIGTTOU] != SIG_IGN && | |
022f2340 BJ |
276 | u.u_signal[SIGTTOU] != SIG_HOLD |
277 | /* | |
278 | && | |
50e2732b | 279 | (u.u_procp->p_flag&SDETACH)==0) { |
022f2340 BJ |
280 | */ |
281 | ) { | |
50e2732b BJ |
282 | gsignal(u.u_procp->p_pgrp, SIGTTOU); |
283 | sleep((caddr_t)&lbolt, TTOPRI); | |
284 | } | |
285 | break; | |
286 | } | |
287 | ||
288 | /* | |
289 | * Process the ioctl. | |
290 | */ | |
4b72e2f9 | 291 | switch (com) { |
89dc6dfb BJ |
292 | |
293 | /* | |
50e2732b | 294 | * Get discipline number |
89dc6dfb BJ |
295 | */ |
296 | case TIOCGETD: | |
4b72e2f9 | 297 | *(int *)data = tp->t_line; |
89dc6dfb BJ |
298 | break; |
299 | ||
300 | /* | |
50e2732b | 301 | * Set line discipline |
89dc6dfb | 302 | */ |
4b72e2f9 SL |
303 | case TIOCSETD: { |
304 | register int t = *(int *)data; | |
305 | ||
89dc6dfb BJ |
306 | if (t >= nldisp) { |
307 | u.u_error = ENXIO; | |
308 | break; | |
309 | } | |
8062c8a7 | 310 | (void) spl5(); |
89dc6dfb BJ |
311 | if (tp->t_line) |
312 | (*linesw[tp->t_line].l_close)(tp); | |
313 | if (t) | |
4b72e2f9 | 314 | (*linesw[t].l_open)(dev, tp); |
89dc6dfb BJ |
315 | if (u.u_error==0) |
316 | tp->t_line = t; | |
8062c8a7 | 317 | (void) spl0(); |
89dc6dfb | 318 | break; |
4b72e2f9 | 319 | } |
89dc6dfb | 320 | |
152c2598 BJ |
321 | /* |
322 | * Prevent more opens on channel | |
323 | */ | |
324 | case TIOCEXCL: | |
325 | tp->t_state |= TS_XCLUDE; | |
326 | break; | |
327 | ||
328 | case TIOCNXCL: | |
329 | tp->t_state &= ~TS_XCLUDE; | |
330 | break; | |
331 | ||
89dc6dfb BJ |
332 | /* |
333 | * Set new parameters | |
334 | */ | |
335 | case TIOCSETP: | |
4b72e2f9 SL |
336 | case TIOCSETN: { |
337 | register struct sgttyb *sg = (struct sgttyb *)data; | |
338 | struct clist tq; | |
339 | ||
101ba270 | 340 | (void) spl5(); |
4b72e2f9 | 341 | if (tp->t_flags&RAW || sg->sg_flags&RAW || com == TIOCSETP) |
e1d74936 | 342 | wflushtty(tp); |
4b72e2f9 SL |
343 | else if ((tp->t_flags&CBREAK) != (sg->sg_flags&CBREAK)) { |
344 | if (sg->sg_flags & CBREAK) { | |
e1d74936 BJ |
345 | catq(&tp->t_rawq, &tp->t_canq); |
346 | tq = tp->t_rawq; | |
347 | tp->t_rawq = tp->t_canq; | |
348 | tp->t_canq = tq; | |
349 | } else { | |
350 | tp->t_local |= LPENDIN; | |
351 | ttwakeup(tp); | |
8062c8a7 BJ |
352 | } |
353 | } | |
4b72e2f9 SL |
354 | tp->t_ispeed = sg->sg_ispeed; |
355 | tp->t_ospeed = sg->sg_ospeed; | |
356 | tp->t_erase = sg->sg_erase; | |
357 | tp->t_kill = sg->sg_kill; | |
358 | tp->t_flags = sg->sg_flags; | |
627c86ee | 359 | if (tp->t_flags & RAW) { |
941944c9 | 360 | tp->t_state &= ~TS_TTSTOP; |
627c86ee KB |
361 | ttstart(tp); |
362 | } | |
101ba270 | 363 | (void) spl0(); |
89dc6dfb | 364 | break; |
4b72e2f9 | 365 | } |
89dc6dfb BJ |
366 | |
367 | /* | |
50e2732b | 368 | * Send current parameters to user |
89dc6dfb | 369 | */ |
4b72e2f9 SL |
370 | case TIOCGETP: { |
371 | register struct sgttyb *sg = (struct sgttyb *)data; | |
372 | ||
373 | sg->sg_ispeed = tp->t_ispeed; | |
374 | sg->sg_ospeed = tp->t_ospeed; | |
375 | sg->sg_erase = tp->t_erase; | |
376 | sg->sg_kill = tp->t_kill; | |
377 | sg->sg_flags = tp->t_flags; | |
89dc6dfb | 378 | break; |
4b72e2f9 | 379 | } |
89dc6dfb BJ |
380 | |
381 | /* | |
382 | * Hang up line on last close | |
383 | */ | |
89dc6dfb | 384 | case TIOCHPCL: |
941944c9 | 385 | tp->t_state |= TS_HUPCLS; |
89dc6dfb BJ |
386 | break; |
387 | ||
7d973a4d | 388 | case TIOCFLUSH: { |
4b72e2f9 SL |
389 | register int flags = *(int *)data; |
390 | ||
391 | if (flags == 0) | |
7d973a4d | 392 | flags = FREAD|FWRITE; |
4b72e2f9 SL |
393 | else |
394 | flags &= FREAD|FWRITE; | |
7d973a4d | 395 | flushtty(tp, flags); |
89dc6dfb | 396 | break; |
4568c08e | 397 | } |
89dc6dfb | 398 | |
4b72e2f9 SL |
399 | case FIONBIO: |
400 | if (*(int *)data) | |
941944c9 BJ |
401 | tp->t_state |= TS_NBIO; |
402 | else | |
403 | tp->t_state &= ~TS_NBIO; | |
404 | break; | |
941944c9 | 405 | |
4b72e2f9 SL |
406 | case FIOASYNC: |
407 | if (*(int *)data) | |
a66e4149 BJ |
408 | tp->t_state |= TS_ASYNC; |
409 | else | |
410 | tp->t_state &= ~TS_ASYNC; | |
411 | break; | |
a66e4149 | 412 | |
89dc6dfb | 413 | /* |
50e2732b | 414 | * Set and fetch special characters |
89dc6dfb BJ |
415 | */ |
416 | case TIOCSETC: | |
4b72e2f9 | 417 | bcopy(data, (caddr_t)&tun, sizeof (struct tchars)); |
89dc6dfb BJ |
418 | break; |
419 | ||
420 | case TIOCGETC: | |
4b72e2f9 | 421 | bcopy((caddr_t)&tun, data, sizeof (struct tchars)); |
8062c8a7 BJ |
422 | break; |
423 | ||
424 | /* local ioctls */ | |
50e2732b BJ |
425 | /* |
426 | * Set/get local special characters. | |
427 | */ | |
8062c8a7 | 428 | case TIOCSLTC: |
4b72e2f9 | 429 | bcopy(data, (caddr_t)&tlun, sizeof (struct ltchars)); |
8062c8a7 BJ |
430 | break; |
431 | ||
432 | case TIOCGLTC: | |
4b72e2f9 | 433 | bcopy((caddr_t)&tlun, data, sizeof (struct ltchars)); |
8062c8a7 BJ |
434 | break; |
435 | ||
50e2732b BJ |
436 | /* |
437 | * Return number of characters immediately available. | |
438 | */ | |
4b72e2f9 SL |
439 | case FIONREAD: |
440 | *(off_t *)data = ttnread(tp); | |
8062c8a7 | 441 | break; |
8062c8a7 BJ |
442 | |
443 | /* | |
444 | * Should allow SPGRP and GPGRP only if tty open for reading. | |
445 | */ | |
446 | case TIOCSPGRP: | |
4b72e2f9 | 447 | tp->t_pgrp = *(int *)data; |
8062c8a7 BJ |
448 | break; |
449 | ||
450 | case TIOCGPGRP: | |
4b72e2f9 | 451 | *(int *)data = tp->t_pgrp; |
8062c8a7 BJ |
452 | break; |
453 | ||
454 | /* | |
455 | * Modify local mode word. | |
456 | */ | |
457 | case TIOCLBIS: | |
4b72e2f9 | 458 | tp->t_local |= *(int *)data; |
8062c8a7 BJ |
459 | break; |
460 | ||
461 | case TIOCLBIC: | |
4b72e2f9 | 462 | tp->t_local &= ~(*(int *)data); |
8062c8a7 BJ |
463 | break; |
464 | ||
465 | case TIOCLSET: | |
4b72e2f9 | 466 | tp->t_local = *(int *)data; |
8062c8a7 BJ |
467 | break; |
468 | ||
469 | case TIOCLGET: | |
4b72e2f9 | 470 | *(int *)data = tp->t_local; |
0dde1c43 BJ |
471 | break; |
472 | ||
4b72e2f9 SL |
473 | case TIOCSTOP: { |
474 | int s = spl5(); | |
bfcf09ee | 475 | |
bfcf09ee BJ |
476 | if ((tp->t_state & TS_TTSTOP) == 0) { |
477 | tp->t_state |= TS_TTSTOP; | |
478 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
479 | } | |
4b72e2f9 | 480 | splx(s); |
bfcf09ee | 481 | break; |
4b72e2f9 SL |
482 | } |
483 | ||
484 | case TIOCSTART: { | |
485 | int s = spl5(); | |
bfcf09ee | 486 | |
bfcf09ee BJ |
487 | if ((tp->t_state & TS_TTSTOP) || (tp->t_local & LFLUSHO)) { |
488 | tp->t_state &= ~TS_TTSTOP; | |
489 | tp->t_local &= ~LFLUSHO; | |
490 | ttstart(tp); | |
491 | } | |
4b72e2f9 | 492 | splx(s); |
bfcf09ee | 493 | break; |
4b72e2f9 | 494 | } |
bfcf09ee | 495 | |
8062c8a7 | 496 | /* end of locals */ |
50450a20 | 497 | |
89dc6dfb | 498 | default: |
4b72e2f9 | 499 | return (0); |
89dc6dfb | 500 | } |
4b72e2f9 | 501 | return (1); |
89dc6dfb | 502 | } |
e1d74936 BJ |
503 | |
504 | ttnread(tp) | |
505 | struct tty *tp; | |
506 | { | |
507 | int nread = 0; | |
508 | ||
509 | if (tp->t_local & LPENDIN) | |
510 | ttypend(tp); | |
511 | nread = tp->t_canq.c_cc; | |
512 | if (tp->t_flags & (RAW|CBREAK)) | |
513 | nread += tp->t_rawq.c_cc; | |
514 | return (nread); | |
515 | } | |
516 | ||
941944c9 | 517 | ttselect(dev, rw) |
e1d74936 | 518 | dev_t dev; |
941944c9 | 519 | int rw; |
e1d74936 BJ |
520 | { |
521 | register struct tty *tp = &cdevsw[major(dev)].d_ttys[minor(dev)]; | |
522 | int nread; | |
941944c9 | 523 | int s = spl5(); |
e1d74936 | 524 | |
941944c9 | 525 | switch (rw) { |
e1d74936 BJ |
526 | |
527 | case FREAD: | |
528 | nread = ttnread(tp); | |
529 | if (nread > 0) | |
941944c9 | 530 | goto win; |
89b8a44c | 531 | if (tp->t_rsel && tp->t_rsel->p_wchan == (caddr_t)&selwait) |
941944c9 | 532 | tp->t_state |= TS_RCOLL; |
e1d74936 BJ |
533 | else |
534 | tp->t_rsel = u.u_procp; | |
941944c9 | 535 | break; |
e1d74936 | 536 | |
941944c9 BJ |
537 | case FWRITE: |
538 | if (tp->t_outq.c_cc <= TTLOWAT(tp)) | |
539 | goto win; | |
941944c9 BJ |
540 | if (tp->t_wsel && tp->t_wsel->p_wchan == (caddr_t)&selwait) |
541 | tp->t_state |= TS_WCOLL; | |
542 | else | |
543 | tp->t_wsel = u.u_procp; | |
544 | break; | |
e1d74936 | 545 | } |
941944c9 BJ |
546 | splx(s); |
547 | return (0); | |
548 | win: | |
549 | splx(s); | |
550 | return (1); | |
e1d74936 | 551 | } |
8bba2b8f | 552 | |
4147b3f6 BJ |
553 | #define OBUFSIZ 100 |
554 | ||
555 | /* | |
556 | * routine called on opens while tp->t_line == NTTYDISC | |
557 | * establishes a process group for distribution of | |
558 | * quits and interrupts from the tty. | |
559 | * (actually, pp->p_pgrp can't be 0 when this routine | |
560 | * is called since NTTYDISC is not the default discipline) | |
561 | */ | |
562 | ttyopen(dev, tp) | |
4b72e2f9 SL |
563 | dev_t dev; |
564 | register struct tty *tp; | |
4147b3f6 BJ |
565 | { |
566 | register struct proc *pp; | |
567 | ||
568 | pp = u.u_procp; | |
569 | tp->t_dev = dev; | |
4b72e2f9 | 570 | if (pp->p_pgrp == 0) { |
4147b3f6 BJ |
571 | u.u_ttyp = tp; |
572 | u.u_ttyd = dev; | |
573 | if (tp->t_pgrp == 0) | |
574 | tp->t_pgrp = pp->p_pid; | |
575 | pp->p_pgrp = tp->t_pgrp; | |
576 | } | |
577 | tp->t_state &= ~TS_WOPEN; | |
578 | tp->t_state |= TS_ISOPEN; | |
579 | if (tp->t_line != NTTYDISC) | |
580 | wflushtty(tp); | |
581 | } | |
582 | ||
583 | /* | |
584 | * clean tp on last close | |
585 | */ | |
586 | ttyclose(tp) | |
4b72e2f9 | 587 | register struct tty *tp; |
4147b3f6 BJ |
588 | { |
589 | ||
590 | if (tp->t_line) { | |
591 | wflushtty(tp); | |
592 | tp->t_line = 0; | |
593 | return; | |
594 | } | |
595 | tp->t_pgrp = 0; | |
596 | wflushtty(tp); | |
597 | tp->t_state = 0; | |
598 | } | |
599 | ||
600 | /* | |
601 | * reinput pending characters after state switch | |
602 | * call at spl5(). | |
603 | */ | |
604 | ttypend(tp) | |
4b72e2f9 | 605 | register struct tty *tp; |
4147b3f6 BJ |
606 | { |
607 | struct clist tq; | |
608 | register c; | |
609 | ||
610 | tp->t_local &= ~LPENDIN; | |
611 | tp->t_lstate |= LSTYPEN; | |
612 | tq = tp->t_rawq; | |
613 | tp->t_rawq.c_cc = 0; | |
614 | tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0; | |
615 | while ((c = getc(&tq)) >= 0) | |
616 | ttyinput(c, tp); | |
617 | tp->t_lstate &= ~LSTYPEN; | |
618 | } | |
619 | ||
620 | /* | |
621 | * Place a character on raw TTY input queue, putting in delimiters | |
622 | * and waking up top half as needed. | |
623 | * Also echo if required. | |
624 | * The arguments are the character and the appropriate | |
625 | * tty structure. | |
626 | */ | |
627 | ttyinput(c, tp) | |
4b72e2f9 SL |
628 | register c; |
629 | register struct tty *tp; | |
4147b3f6 BJ |
630 | { |
631 | register int t_flags; | |
632 | int i; | |
633 | ||
634 | if (tp->t_local&LPENDIN) | |
635 | ttypend(tp); | |
636 | tk_nin++; | |
637 | c &= 0377; | |
638 | t_flags = tp->t_flags; | |
639 | if (t_flags&TANDEM) | |
640 | ttyblock(tp); | |
641 | if ((t_flags&RAW)==0) { | |
642 | if ((tp->t_lstate&LSTYPEN) == 0) | |
643 | c &= 0177; | |
644 | /* check for literal nexting very first */ | |
645 | if (tp->t_lstate&LSLNCH) { | |
646 | c |= 0200; | |
647 | tp->t_lstate &= ~LSLNCH; | |
648 | } | |
649 | if (tp->t_line == NTTYDISC && c==tlun.t_lnextc) { | |
650 | if (tp->t_flags&ECHO) | |
651 | ttyout("^\b", tp); | |
652 | tp->t_lstate |= LSLNCH; | |
653 | /* check for output control functions */ | |
654 | } else if (c==tun.t_stopc) { | |
655 | if ((tp->t_state&TS_TTSTOP)==0) { | |
656 | tp->t_state |= TS_TTSTOP; | |
657 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
658 | return; | |
659 | } | |
660 | if (c!=tun.t_startc) | |
661 | return; | |
662 | } else if (c==tun.t_startc) { | |
663 | tp->t_state &= ~TS_TTSTOP; | |
664 | tp->t_local &= ~LFLUSHO; | |
665 | ttstart(tp); | |
666 | return; | |
667 | } else if (tp->t_line == NTTYDISC && c==tlun.t_flushc) { | |
668 | if (tp->t_local & LFLUSHO) | |
669 | tp->t_local &= ~LFLUSHO; | |
670 | else { | |
671 | flushtty(tp, FWRITE); | |
672 | ttyecho(c, tp); | |
673 | if (tp->t_rawq.c_cc+tp->t_canq.c_cc) | |
674 | ttyretype(tp); | |
675 | tp->t_local |= LFLUSHO; | |
676 | } | |
677 | ttstart(tp); | |
678 | return; | |
679 | } else if (c==tun.t_intrc || c==tun.t_quitc || | |
680 | (tp->t_line == NTTYDISC && c==tlun.t_suspc)) { | |
681 | if ((tp->t_local & LNOFLSH) == 0) | |
682 | flushtty(tp, | |
683 | c==tlun.t_suspc ? FREAD : FREAD|FWRITE); | |
684 | ttyecho(c, tp); | |
685 | c = c==tun.t_intrc ? SIGINT : | |
686 | ((c==tun.t_quitc) ? SIGQUIT : SIGTSTP); | |
687 | ttsignal(tp, c); | |
688 | /* check for buffer editing functions - cooked mode */ | |
689 | } else if ((t_flags&CBREAK) == 0) { | |
690 | if ((tp->t_lstate&LSQUOT) && | |
691 | (c==tp->t_erase||c==tp->t_kill)) { | |
692 | ttyrub(unputc(&tp->t_rawq), tp); | |
693 | c |= 0200; | |
694 | } | |
695 | if (c==tp->t_erase) { | |
696 | if (tp->t_rawq.c_cc) | |
697 | ttyrub(unputc(&tp->t_rawq), tp); | |
698 | } else if (c==tp->t_kill) { | |
699 | if (tp->t_local&LCRTKIL && | |
700 | tp->t_rawq.c_cc == tp->t_rocount) { | |
701 | while (tp->t_rawq.c_cc) | |
702 | ttyrub(unputc(&tp->t_rawq), tp); | |
703 | } else { | |
704 | ttyecho(c, tp); | |
705 | ttyecho('\n', tp); | |
706 | while (getc(&tp->t_rawq) > 0) | |
707 | ; | |
708 | tp->t_rocount = 0; | |
709 | } | |
710 | tp->t_lstate = 0; | |
711 | } else if (tp->t_line == NTTYDISC && c==tlun.t_werasc) { | |
712 | if (tp->t_rawq.c_cc == 0) | |
713 | goto out; | |
714 | do { | |
715 | c = unputc(&tp->t_rawq); | |
716 | if (c != ' ' && c != '\t') | |
717 | goto erasenb; | |
718 | ttyrub(c, tp); | |
719 | } while (tp->t_rawq.c_cc); | |
720 | goto out; | |
721 | erasenb: | |
722 | do { | |
723 | ttyrub(c, tp); | |
724 | if (tp->t_rawq.c_cc == 0) | |
725 | goto out; | |
726 | c = unputc(&tp->t_rawq); | |
727 | } while (c != ' ' && c != '\t'); | |
728 | (void) putc(c, &tp->t_rawq); | |
729 | } else if (tp->t_line == NTTYDISC && c==tlun.t_rprntc) { | |
730 | ttyretype(tp); | |
731 | /* check for cooked mode input buffer overflow */ | |
732 | } else if (tp->t_rawq.c_cc+tp->t_canq.c_cc >= TTYHOG) { | |
733 | ; | |
734 | /* put data char in q for user and wakeup if a break char */ | |
735 | } else if (putc(c, &tp->t_rawq) >= 0) { | |
736 | if (tp->t_rawq.c_cc+tp->t_canq.c_cc==TTYHOG | |
737 | && tp->t_line == NTTYDISC) | |
738 | (void) ttyoutput(CTRL(g), tp); | |
739 | if (!ttbreakc(c, tp)) { | |
740 | if (tp->t_rocount++ == 0) | |
741 | tp->t_rocol = tp->t_col; | |
742 | } else { | |
743 | tp->t_rocount = 0; | |
744 | catq(&tp->t_rawq, &tp->t_canq); | |
745 | /* IF (TP->T_CHAN) (VOID) SDATA(TP->T_CHAN); */ | |
746 | ttwakeup(tp); | |
747 | } | |
748 | tp->t_lstate &= ~LSQUOT; | |
749 | if (c == '\\') | |
750 | tp->t_lstate |= LSQUOT; | |
751 | if (tp->t_lstate&LSERASE) { | |
752 | tp->t_lstate &= ~LSERASE; | |
753 | (void) ttyoutput('/', tp); | |
754 | } | |
755 | i = tp->t_col; | |
756 | ttyecho(c, tp); | |
757 | if (c==tun.t_eofc && tp->t_flags&ECHO) { | |
758 | i = MIN(2, tp->t_col - i); | |
759 | while (i > 0) { | |
760 | (void) ttyoutput('\b', tp); | |
761 | i--; | |
762 | } | |
763 | } | |
764 | } | |
765 | /* CBREAK mode */ | |
766 | } else if (tp->t_rawq.c_cc > TTYHOG) { | |
767 | if (tp->t_outq.c_cc < TTHIWAT(tp) && | |
768 | tp->t_line == NTTYDISC) | |
769 | (void) ttyoutput(CTRL(g), tp); | |
770 | } else if (putc(c, &tp->t_rawq) >= 0) { | |
771 | ttwakeup(tp); | |
772 | ttyecho(c, tp); | |
773 | } | |
774 | /* RAW mode */ | |
775 | } else if (tp->t_rawq.c_cc > TTYHOG) | |
776 | flushtty(tp, FREAD|FWRITE); | |
777 | else { | |
778 | if (putc(c, &tp->t_rawq) >= 0) | |
779 | ttwakeup(tp); | |
780 | ttyecho(c, tp); | |
781 | } | |
782 | out: | |
783 | if (tp->t_local & LDECCTQ && tp->t_state & TS_TTSTOP && | |
784 | tun.t_startc != tun.t_stopc) | |
785 | return; | |
786 | tp->t_state &= ~TS_TTSTOP; | |
787 | tp->t_local &= ~LFLUSHO; | |
788 | ttstart(tp); | |
789 | } | |
790 | ||
791 | /* | |
792 | * put character on TTY output queue, adding delays, | |
793 | * expanding tabs, and handling the CR/NL bit. | |
794 | * It is called both from the top half for output, and from | |
795 | * interrupt level for echoing. | |
796 | * The arguments are the character and the tty structure. | |
797 | * Returns < 0 if putc succeeds, otherwise returns char to resend | |
798 | * Must be recursive. | |
799 | */ | |
800 | ttyoutput(c, tp) | |
801 | register c; | |
802 | register struct tty *tp; | |
803 | { | |
804 | register char *colp; | |
805 | register ctype; | |
806 | ||
807 | if (tp->t_flags&RAW || tp->t_local&LLITOUT) { | |
808 | if (tp->t_local&LFLUSHO) | |
809 | return (-1); | |
810 | if (putc(c, &tp->t_outq)) | |
4b72e2f9 | 811 | return (c); |
4147b3f6 BJ |
812 | tk_nout++; |
813 | return (-1); | |
814 | } | |
815 | /* | |
816 | * Ignore EOT in normal mode to avoid hanging up | |
817 | * certain terminals. | |
818 | */ | |
819 | c &= 0177; | |
820 | if (c==CEOT && (tp->t_flags&CBREAK)==0) | |
821 | return (-1); | |
822 | /* | |
823 | * Turn tabs to spaces as required | |
824 | */ | |
825 | if (c=='\t' && (tp->t_flags&TBDELAY)==XTABS) { | |
826 | register int s; | |
827 | ||
828 | c = 8 - (tp->t_col&7); | |
829 | if ((tp->t_local&LFLUSHO) == 0) { | |
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 | } | |
852 | if ('A'<=c && c<='Z') { | |
853 | if (ttyoutput('\\', tp) >= 0) | |
854 | return (c); | |
855 | } else if ('a'<=c && c<='z') | |
856 | c += 'A' - 'a'; | |
857 | } | |
858 | /* | |
859 | * turn <nl> to <cr><lf> if desired. | |
860 | */ | |
861 | if (c=='\n' && tp->t_flags&CRMOD) | |
862 | if (ttyoutput('\r', tp) >= 0) | |
863 | return (c); | |
864 | if (c=='~' && tp->t_local<ILDE) | |
865 | c = '`'; | |
866 | if ((tp->t_local&LFLUSHO) == 0 && putc(c, &tp->t_outq)) | |
867 | return (c); | |
868 | /* | |
869 | * Calculate delays. | |
870 | * The numbers here represent clock ticks | |
871 | * and are not necessarily optimal for all terminals. | |
872 | * The delays are indicated by characters above 0200. | |
873 | * In raw mode there are no delays and the | |
874 | * transmission path is 8 bits wide. | |
875 | */ | |
876 | colp = &tp->t_col; | |
877 | ctype = partab[c]; | |
878 | c = 0; | |
879 | switch (ctype&077) { | |
880 | ||
881 | case ORDINARY: | |
882 | (*colp)++; | |
883 | ||
884 | case CONTROL: | |
885 | break; | |
886 | ||
887 | case BACKSPACE: | |
888 | if (*colp) | |
889 | (*colp)--; | |
890 | break; | |
891 | ||
892 | case NEWLINE: | |
893 | ctype = (tp->t_flags >> 8) & 03; | |
4b72e2f9 | 894 | if (ctype == 1) { /* tty 37 */ |
4147b3f6 BJ |
895 | if (*colp) |
896 | c = max(((unsigned)*colp>>4) + 3, (unsigned)6); | |
897 | } else | |
4b72e2f9 | 898 | if (ctype == 2) { /* vt05 */ |
4147b3f6 BJ |
899 | c = 6; |
900 | } | |
901 | *colp = 0; | |
902 | break; | |
903 | ||
904 | case TAB: | |
905 | ctype = (tp->t_flags >> 10) & 03; | |
4b72e2f9 | 906 | if (ctype == 1) { /* tty 37 */ |
4147b3f6 | 907 | c = 1 - (*colp | ~07); |
4b72e2f9 | 908 | if (c < 5) |
4147b3f6 BJ |
909 | c = 0; |
910 | } | |
911 | *colp |= 07; | |
912 | (*colp)++; | |
913 | break; | |
914 | ||
915 | case VTAB: | |
4b72e2f9 | 916 | if (tp->t_flags & VTDELAY) /* tty 37 */ |
4147b3f6 BJ |
917 | c = 0177; |
918 | break; | |
919 | ||
920 | case RETURN: | |
921 | ctype = (tp->t_flags >> 12) & 03; | |
4b72e2f9 | 922 | if (ctype == 1) { /* tn 300 */ |
4147b3f6 | 923 | c = 5; |
4b72e2f9 | 924 | } else if (ctype == 2) { /* ti 700 */ |
4147b3f6 | 925 | c = 10; |
4b72e2f9 | 926 | } else if (ctype == 3) { /* concept 100 */ |
4147b3f6 BJ |
927 | int i; |
928 | if ((i = *colp) >= 0) | |
929 | for (; i<9; i++) | |
930 | (void) putc(0177, &tp->t_outq); | |
931 | } | |
932 | *colp = 0; | |
933 | } | |
4b72e2f9 | 934 | if (c && (tp->t_local&LFLUSHO) == 0) |
4147b3f6 BJ |
935 | (void) putc(c|0200, &tp->t_outq); |
936 | return (-1); | |
937 | } | |
938 | ||
939 | /* | |
940 | * Called from device's read routine after it has | |
941 | * calculated the tty-structure given as argument. | |
942 | */ | |
d6d7360b | 943 | ttread(tp, uio) |
4b72e2f9 | 944 | register struct tty *tp; |
d6d7360b | 945 | struct uio *uio; |
4147b3f6 BJ |
946 | { |
947 | register struct clist *qp; | |
948 | register c, first; | |
840510a3 | 949 | int error = 0; |
4147b3f6 BJ |
950 | |
951 | if ((tp->t_state&TS_CARR_ON)==0) | |
840510a3 | 952 | return (EIO); |
4147b3f6 BJ |
953 | loop: |
954 | (void) spl5(); | |
955 | if (tp->t_local&LPENDIN) | |
956 | ttypend(tp); | |
957 | (void) spl0(); | |
958 | while (tp == u.u_ttyp && u.u_procp->p_pgrp != tp->t_pgrp) { | |
959 | if (u.u_signal[SIGTTIN] == SIG_IGN || | |
960 | u.u_signal[SIGTTIN] == SIG_HOLD || | |
961 | /* | |
962 | (u.u_procp->p_flag&SDETACH) || | |
963 | */ | |
964 | u.u_procp->p_flag&SVFORK) | |
840510a3 | 965 | return (EIO); |
4147b3f6 BJ |
966 | gsignal(u.u_procp->p_pgrp, SIGTTIN); |
967 | sleep((caddr_t)&lbolt, TTIPRI); | |
968 | } | |
969 | if (tp->t_flags&RAW) { | |
970 | (void) spl5(); | |
971 | if (tp->t_rawq.c_cc <= 0) { | |
972 | if ((tp->t_state&TS_CARR_ON)==0 || | |
973 | (tp->t_state&TS_NBIO)) { | |
974 | (void) spl0(); | |
840510a3 | 975 | return (EWOULDBLOCK); |
4147b3f6 BJ |
976 | } |
977 | sleep((caddr_t)&tp->t_rawq, TTIPRI); | |
978 | (void) spl0(); | |
979 | goto loop; | |
980 | } | |
981 | (void) spl0(); | |
d6d7360b | 982 | while (tp->t_rawq.c_cc && uio->uio_iovcnt) { |
840510a3 BJ |
983 | error = passuc(getc(&tp->t_rawq), uio); |
984 | if (error) | |
d6d7360b BJ |
985 | break; |
986 | } | |
840510a3 | 987 | return (error); |
4147b3f6 BJ |
988 | } else { |
989 | qp = tp->t_flags & CBREAK ? &tp->t_rawq : &tp->t_canq; | |
990 | (void) spl5(); | |
991 | if (qp->c_cc <= 0) { | |
992 | if ((tp->t_state&TS_CARR_ON)==0 || | |
993 | (tp->t_state&TS_NBIO)) { | |
994 | (void) spl0(); | |
840510a3 | 995 | return (EWOULDBLOCK); |
4147b3f6 BJ |
996 | } |
997 | sleep((caddr_t)&tp->t_rawq, TTIPRI); | |
998 | (void) spl0(); | |
999 | goto loop; | |
1000 | } | |
1001 | (void) spl0(); | |
1002 | first = 1; | |
1003 | while ((c = getc(qp)) >= 0) { | |
1004 | if (tp->t_flags&CRMOD && c == '\r') | |
1005 | c = '\n'; | |
1006 | if (tp->t_flags&LCASE && c <= 0177) | |
1007 | if (tp->t_lstate&LSBKSL) { | |
1008 | if (maptab[c]) | |
1009 | c = maptab[c]; | |
1010 | tp->t_lstate &= ~LSBKSL; | |
1011 | } else if (c >= 'A' && c <= 'Z') | |
1012 | c += 'a' - 'A'; | |
1013 | else if (c == '\\') { | |
1014 | tp->t_lstate |= LSBKSL; | |
1015 | continue; | |
1016 | } | |
f2f41cda | 1017 | if (tp->t_line == NTTYDISC && c == tlun.t_dsuspc) { |
4147b3f6 BJ |
1018 | ttsignal(tp, SIGTSTP); |
1019 | if (first) { | |
1020 | sleep((caddr_t)&lbolt, TTIPRI); | |
1021 | goto loop; | |
1022 | } | |
1023 | break; | |
1024 | } | |
1025 | if (c == tun.t_eofc && (tp->t_flags&CBREAK)==0) | |
1026 | break; | |
840510a3 BJ |
1027 | error = passuc(c & 0177, uio); |
1028 | if (error) | |
d6d7360b BJ |
1029 | break; |
1030 | if (uio->uio_iovcnt == 0) | |
4147b3f6 BJ |
1031 | break; |
1032 | if ((tp->t_flags&CBREAK)==0 && ttbreakc(c, tp)) | |
1033 | break; | |
1034 | first = 0; | |
1035 | } | |
1036 | tp->t_lstate &= ~LSBKSL; | |
1037 | } | |
4147b3f6 BJ |
1038 | if (tp->t_state&TS_TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) { |
1039 | if (putc(tun.t_startc, &tp->t_outq)==0) { | |
1040 | tp->t_state &= ~TS_TBLOCK; | |
1041 | ttstart(tp); | |
1042 | } | |
1043 | tp->t_char = 0; | |
1044 | } | |
840510a3 | 1045 | return (error); |
4147b3f6 BJ |
1046 | } |
1047 | ||
1048 | /* | |
1049 | * Called from the device's write routine after it has | |
1050 | * calculated the tty-structure given as argument. | |
1051 | */ | |
913ea2d1 | 1052 | ttwrite(tp, uio) |
4b72e2f9 | 1053 | register struct tty *tp; |
913ea2d1 | 1054 | struct uio *uio; |
4147b3f6 BJ |
1055 | { |
1056 | #ifdef vax | |
1057 | /* | |
1058 | * THE POSITIONING OF CP, CC, AND CE ARE CRITICAL | |
1059 | * AND MUST NOT BE CHANGED WITHOUT PATCHING | |
1060 | * THE 'ASM' INLINES BELOW. WATCH OUT. | |
1061 | */ | |
1062 | #endif | |
1063 | register char *cp; | |
1064 | register int cc, ce; | |
1065 | register i; | |
1066 | char obuf[OBUFSIZ]; | |
1067 | register c; | |
1068 | int hiwat = TTHIWAT(tp); | |
913ea2d1 | 1069 | int cnt = uio->uio_resid; |
840510a3 | 1070 | int error = 0; |
4147b3f6 BJ |
1071 | |
1072 | if ((tp->t_state&TS_CARR_ON)==0) | |
840510a3 | 1073 | return (EIO); |
4147b3f6 BJ |
1074 | loop: |
1075 | while (u.u_procp->p_pgrp != tp->t_pgrp && tp == u.u_ttyp && | |
1076 | (tp->t_local<OSTOP) && (u.u_procp->p_flag&SVFORK)==0 && | |
1077 | u.u_signal[SIGTTOU] != SIG_IGN && | |
1078 | u.u_signal[SIGTTOU] != SIG_HOLD | |
1079 | /* | |
1080 | && | |
1081 | (u.u_procp->p_flag&SDETACH)==0) { | |
1082 | */ | |
1083 | ) { | |
1084 | gsignal(u.u_procp->p_pgrp, SIGTTOU); | |
1085 | sleep((caddr_t)&lbolt, TTIPRI); | |
1086 | } | |
913ea2d1 BJ |
1087 | while (uio->uio_resid > 0) { |
1088 | cc = uio->uio_iov->iov_len; | |
1089 | if (cc == 0) { | |
1090 | uio->uio_iovcnt--; | |
1091 | uio->uio_iov++; | |
1092 | if (uio->uio_iovcnt < 0) | |
1093 | panic("ttwrite"); | |
1094 | continue; | |
1095 | } | |
1096 | if (cc > OBUFSIZ) | |
1097 | cc = OBUFSIZ; | |
4147b3f6 | 1098 | cp = obuf; |
840510a3 BJ |
1099 | error = uiomove(cp, cc, UIO_WRITE, uio); |
1100 | if (error) | |
4147b3f6 BJ |
1101 | break; |
1102 | if (tp->t_outq.c_cc > hiwat) | |
1103 | goto ovhiwat; | |
1104 | if (tp->t_local&LFLUSHO) | |
1105 | continue; | |
1106 | if (tp->t_flags&LCASE || tp->t_local<ILDE) { | |
1107 | while (cc) { | |
1108 | c = *cp++; | |
1109 | tp->t_rocount = 0; | |
4b72e2f9 | 1110 | while ((c = ttyoutput(c, tp)) >= 0) { |
4147b3f6 BJ |
1111 | /* out of clists, wait a bit */ |
1112 | ttstart(tp); | |
1113 | sleep((caddr_t)&lbolt, TTOPRI); | |
1114 | tp->t_rocount = 0; | |
1115 | } | |
1116 | --cc; | |
1117 | if (tp->t_outq.c_cc > hiwat) | |
1118 | goto ovhiwat; | |
1119 | } | |
1120 | continue; | |
1121 | } | |
1122 | while (cc) { | |
1123 | if (tp->t_flags&RAW || tp->t_local&LLITOUT) | |
1124 | ce = cc; | |
1125 | else { | |
1126 | #ifdef vax | |
1127 | asm(" scanc r9,(r10),_partab,$077"); | |
1128 | asm(" subl3 r0,r9,r8"); | |
1129 | #else | |
1130 | ce=0; | |
4b72e2f9 | 1131 | while (((partab[*(unsigned char *)(cp+ce)]&077)==0)&&(ce<cc)) |
4147b3f6 BJ |
1132 | ce++; |
1133 | #endif | |
1134 | if (ce==0) { | |
1135 | tp->t_rocount = 0; | |
1136 | if (ttyoutput(*cp, tp) >= 0) { | |
1137 | ttstart(tp); | |
1138 | sleep((caddr_t)&lbolt, TTOPRI); | |
1139 | continue; | |
1140 | } | |
1141 | cp++; | |
1142 | cc--; | |
1143 | if (tp->t_outq.c_cc > hiwat) | |
1144 | goto ovhiwat; | |
1145 | } | |
1146 | } | |
1147 | tp->t_rocount = 0; | |
1148 | i=b_to_q(cp,ce,&tp->t_outq); | |
1149 | ce-=i; | |
1150 | tk_nout+=ce; | |
1151 | tp->t_col+=ce; | |
1152 | cp+=ce; | |
1153 | cc-=ce; | |
1154 | if (i) { | |
1155 | ttstart(tp); | |
1156 | sleep((caddr_t)&lbolt, TTOPRI); | |
1157 | } | |
1158 | if (ce || tp->t_outq.c_cc > hiwat) | |
1159 | goto ovhiwat; | |
1160 | } | |
1161 | } | |
1162 | ttstart(tp); | |
840510a3 | 1163 | return (error); |
4147b3f6 BJ |
1164 | |
1165 | ovhiwat: | |
1166 | (void) spl5(); | |
913ea2d1 BJ |
1167 | uio->uio_iov->iov_base -= cc; |
1168 | uio->uio_iov->iov_len += cc; | |
1169 | uio->uio_resid += cc; | |
1170 | uio->uio_offset -= cc; | |
4147b3f6 BJ |
1171 | if (tp->t_outq.c_cc <= hiwat) { |
1172 | (void) spl0(); | |
1173 | goto loop; | |
1174 | } | |
1175 | ttstart(tp); | |
1176 | if (tp->t_state & TS_NBIO) { | |
913ea2d1 | 1177 | if (uio->uio_resid == cnt) |
840510a3 BJ |
1178 | return (EWOULDBLOCK); |
1179 | return (0); | |
4147b3f6 BJ |
1180 | } |
1181 | tp->t_state |= TS_ASLEEP; | |
1182 | sleep((caddr_t)&tp->t_outq, TTOPRI); | |
1183 | (void) spl0(); | |
1184 | goto loop; | |
1185 | } | |
1186 | ||
1187 | /* | |
1188 | * Rubout one character from the rawq of tp | |
1189 | * as cleanly as possible. | |
1190 | */ | |
1191 | ttyrub(c, tp) | |
4b72e2f9 SL |
1192 | register c; |
1193 | register struct tty *tp; | |
4147b3f6 BJ |
1194 | { |
1195 | register char *cp; | |
1196 | register int savecol; | |
1197 | int s; | |
1198 | char *nextc(); | |
1199 | ||
1200 | if ((tp->t_flags&ECHO)==0) | |
1201 | return; | |
1202 | tp->t_local &= ~LFLUSHO; | |
1203 | c &= 0377; | |
1204 | if (tp->t_local&LCRTBS) { | |
1205 | if (tp->t_rocount == 0) { | |
1206 | /* | |
1207 | * Screwed by ttwrite; retype | |
1208 | */ | |
1209 | ttyretype(tp); | |
1210 | return; | |
1211 | } | |
1212 | if (c==('\t'|0200) || c==('\n'|0200)) | |
1213 | ttyrubo(tp, 2); | |
4b72e2f9 | 1214 | else switch (partab[c&=0177] & 0177) { |
4147b3f6 BJ |
1215 | |
1216 | case ORDINARY: | |
1217 | if (tp->t_flags&LCASE && c >= 'A' && c <= 'Z') | |
1218 | ttyrubo(tp, 2); | |
1219 | else | |
1220 | ttyrubo(tp, 1); | |
1221 | break; | |
1222 | ||
1223 | case VTAB: | |
1224 | case BACKSPACE: | |
1225 | case CONTROL: | |
1226 | case RETURN: | |
1227 | if (tp->t_local & LCTLECH) | |
1228 | ttyrubo(tp, 2); | |
1229 | break; | |
1230 | ||
1231 | case TAB: | |
1232 | if (tp->t_rocount < tp->t_rawq.c_cc) { | |
1233 | ttyretype(tp); | |
1234 | return; | |
1235 | } | |
1236 | s = spl5(); | |
1237 | savecol = tp->t_col; | |
1238 | tp->t_lstate |= LSCNTTB; | |
1239 | tp->t_local |= LFLUSHO; | |
1240 | tp->t_col = tp->t_rocol; | |
1241 | for (cp = tp->t_rawq.c_cf; cp; cp = nextc(&tp->t_rawq, cp)) | |
1242 | ttyecho(*cp, tp); | |
1243 | tp->t_local &= ~LFLUSHO; | |
1244 | tp->t_lstate &= ~LSCNTTB; | |
1245 | splx(s); | |
1246 | /* | |
1247 | * savecol will now be length of the tab | |
1248 | */ | |
1249 | savecol -= tp->t_col; | |
1250 | tp->t_col += savecol; | |
1251 | if (savecol > 8) | |
1252 | savecol = 8; /* overflow screw */ | |
1253 | while (--savecol >= 0) | |
1254 | (void) ttyoutput('\b', tp); | |
1255 | break; | |
1256 | ||
1257 | default: | |
1258 | panic("ttyrub"); | |
1259 | } | |
1260 | } else if (tp->t_local&LPRTERA) { | |
1261 | if ((tp->t_lstate&LSERASE) == 0) { | |
1262 | (void) ttyoutput('\\', tp); | |
1263 | tp->t_lstate |= LSERASE; | |
1264 | } | |
1265 | ttyecho(c, tp); | |
1266 | } else | |
1267 | ttyecho(tp->t_erase, tp); | |
1268 | tp->t_rocount--; | |
1269 | } | |
1270 | ||
1271 | /* | |
1272 | * Crt back over cnt chars perhaps | |
1273 | * erasing them. | |
1274 | */ | |
1275 | ttyrubo(tp, cnt) | |
4b72e2f9 SL |
1276 | register struct tty *tp; |
1277 | int cnt; | |
4147b3f6 BJ |
1278 | { |
1279 | ||
1280 | while (--cnt >= 0) | |
1281 | ttyout(tp->t_local&LCRTERA ? "\b \b" : "\b", tp); | |
1282 | } | |
1283 | ||
1284 | /* | |
1285 | * Reprint the rawq line. | |
1286 | * We assume c_cc has already been checked. | |
1287 | */ | |
1288 | ttyretype(tp) | |
4b72e2f9 | 1289 | register struct tty *tp; |
4147b3f6 BJ |
1290 | { |
1291 | register char *cp; | |
1292 | char *nextc(); | |
1293 | int s; | |
1294 | ||
1295 | if (tlun.t_rprntc != 0377) | |
1296 | ttyecho(tlun.t_rprntc, tp); | |
1297 | (void) ttyoutput('\n', tp); | |
1298 | s = spl5(); | |
1299 | for (cp = tp->t_canq.c_cf; cp; cp = nextc(&tp->t_canq, cp)) | |
1300 | ttyecho(*cp, tp); | |
1301 | for (cp = tp->t_rawq.c_cf; cp; cp = nextc(&tp->t_rawq, cp)) | |
1302 | ttyecho(*cp, tp); | |
1303 | tp->t_lstate &= ~LSERASE; | |
1304 | splx(s); | |
1305 | tp->t_rocount = tp->t_rawq.c_cc; | |
1306 | tp->t_rocol = 0; | |
1307 | } | |
1308 | ||
1309 | /* | |
1310 | * Echo a typed character to the terminal | |
1311 | */ | |
1312 | ttyecho(c, tp) | |
4b72e2f9 SL |
1313 | register c; |
1314 | register struct tty *tp; | |
4147b3f6 BJ |
1315 | { |
1316 | ||
1317 | if ((tp->t_lstate & LSCNTTB) == 0) | |
1318 | tp->t_local &= ~LFLUSHO; | |
1319 | if ((tp->t_flags&ECHO) == 0) | |
1320 | return; | |
1321 | c &= 0377; | |
1322 | if (tp->t_flags&RAW) { | |
1323 | (void) ttyoutput(c, tp); | |
1324 | return; | |
1325 | } | |
1326 | if (c == '\r' && tp->t_flags&CRMOD) | |
1327 | c = '\n'; | |
1328 | if (tp->t_local&LCTLECH) { | |
1329 | if ((c&0177) <= 037 && c!='\t' && c!='\n' || (c&0177)==0177) { | |
1330 | (void) ttyoutput('^', tp); | |
1331 | c &= 0177; | |
1332 | if (c == 0177) | |
1333 | c = '?'; | |
1334 | else if (tp->t_flags&LCASE) | |
1335 | c += 'a' - 1; | |
1336 | else | |
1337 | c += 'A' - 1; | |
1338 | } | |
1339 | } | |
1340 | if ((tp->t_flags&LCASE) && (c >= 'A' && c <= 'Z')) | |
1341 | c += 'a' - 'A'; | |
1342 | (void) ttyoutput(c & 0177, tp); | |
1343 | } | |
1344 | ||
1345 | /* | |
1346 | * Is c a break char for tp? | |
1347 | */ | |
1348 | ttbreakc(c, tp) | |
4b72e2f9 SL |
1349 | register c; |
1350 | register struct tty *tp; | |
4147b3f6 BJ |
1351 | { |
1352 | return (c == '\n' || c == tun.t_eofc || c == tun.t_brkc || | |
1353 | c == '\r' && (tp->t_flags&CRMOD)); | |
1354 | } | |
1355 | ||
1356 | /* | |
1357 | * send string cp to tp | |
1358 | */ | |
1359 | ttyout(cp, tp) | |
4b72e2f9 SL |
1360 | register char *cp; |
1361 | register struct tty *tp; | |
4147b3f6 BJ |
1362 | { |
1363 | register char c; | |
1364 | ||
1365 | while (c = *cp++) | |
1366 | (void) ttyoutput(c, tp); | |
1367 | } | |
1368 | ||
1369 | ttwakeup(tp) | |
1370 | struct tty *tp; | |
1371 | { | |
1372 | ||
1373 | if (tp->t_rsel) { | |
1374 | selwakeup(tp->t_rsel, tp->t_state&TS_RCOLL); | |
1375 | tp->t_state &= ~TS_RCOLL; | |
1376 | tp->t_rsel = 0; | |
1377 | } | |
1378 | wakeup((caddr_t)&tp->t_rawq); | |
1379 | } | |
1380 | ||
1381 | ttsignal(tp, signo) | |
1382 | struct tty *tp; | |
1383 | int signo; | |
1384 | { | |
1385 | ||
1386 | gsignal(tp->t_pgrp, signo); | |
1387 | } |