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f406ae69 KB |
1 | /*- |
2 | * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. | |
3 | * Copyright (c) 1991 The Regents of the University of California. | |
4 | * All rights reserved. | |
5 | * | |
6 | * %sccs.include.redist.c% | |
da7c5cc6 | 7 | * |
ea853f5f | 8 | * @(#)tty.c 7.50 (Berkeley) %G% |
da7c5cc6 | 9 | */ |
961945a8 | 10 | |
94368568 JB |
11 | #include "param.h" |
12 | #include "systm.h" | |
94368568 | 13 | #include "ioctl.h" |
77f9c500 | 14 | #include "proc.h" |
2c6a4e11 | 15 | #define TTYDEFCHARS |
52004850 | 16 | #include "tty.h" |
2c6a4e11 | 17 | #undef TTYDEFCHARS |
e39f9ea6 MT |
18 | #define TTYDEFCHARS |
19 | #include "ttydefaults.h" | |
20 | #undef TTYDEFCHARS | |
21 | #include "termios.h" | |
94368568 JB |
22 | #include "file.h" |
23 | #include "conf.h" | |
fb1db32c | 24 | #include "dkstat.h" |
94368568 JB |
25 | #include "uio.h" |
26 | #include "kernel.h" | |
c4ec2128 | 27 | #include "vnode.h" |
2c6a4e11 | 28 | #include "syslog.h" |
d301d150 | 29 | |
6cec2da2 | 30 | #include "vm/vm.h" |
e39f9ea6 | 31 | #include "syslog.h" |
89dc6dfb | 32 | |
91c77c3e KB |
33 | static int proc_compare __P((struct proc *p1, struct proc *p2)); |
34 | ||
09b836aa MK |
35 | /* symbolic sleep message strings */ |
36 | char ttyin[] = "ttyin"; | |
37 | char ttyout[] = "ttyout"; | |
bbd77f60 MT |
38 | char ttopen[] = "ttyopn"; |
39 | char ttclos[] = "ttycls"; | |
09b836aa MK |
40 | char ttybg[] = "ttybg"; |
41 | char ttybuf[] = "ttybuf"; | |
42 | ||
8bba2b8f RE |
43 | /* |
44 | * Table giving parity for characters and indicating | |
e39f9ea6 MT |
45 | * character classes to tty driver. The 8th bit |
46 | * indicates parity, the 7th bit indicates the character | |
47 | * is an alphameric or underscore (for ALTWERASE), and the | |
48 | * low 6 bits indicate delay type. If the low 6 bits are 0 | |
d554174a MK |
49 | * then the character needs no special processing on output; |
50 | * classes other than 0 might be translated or (not currently) | |
51 | * require delays. | |
8bba2b8f | 52 | */ |
d554174a MK |
53 | #define PARITY(c) (partab[c] & 0x80) |
54 | #define ISALPHA(c) (partab[(c)&TTY_CHARMASK] & 0x40) | |
55 | #define CCLASSMASK 0x3f | |
56 | #define CCLASS(c) (partab[c] & CCLASSMASK) | |
57 | ||
58 | #define E 0x00 /* even parity */ | |
59 | #define O 0x80 /* odd parity */ | |
60 | #define ALPHA 0x40 /* alpha or underscore */ | |
61 | ||
62 | #define NO ORDINARY | |
63 | #define NA ORDINARY|ALPHA | |
64 | #define CC CONTROL | |
65 | #define BS BACKSPACE | |
66 | #define NL NEWLINE | |
67 | #define TB TAB | |
68 | #define VT VTAB | |
69 | #define CR RETURN | |
8bba2b8f RE |
70 | |
71 | char partab[] = { | |
d554174a MK |
72 | E|CC, O|CC, O|CC, E|CC, O|CC, E|CC, E|CC, O|CC, /* nul - bel */ |
73 | O|BS, E|TB, E|NL, O|CC, E|VT, O|CR, O|CC, E|CC, /* bs - si */ | |
74 | O|CC, E|CC, E|CC, O|CC, E|CC, O|CC, O|CC, E|CC, /* dle - etb */ | |
75 | E|CC, O|CC, O|CC, E|CC, O|CC, E|CC, E|CC, O|CC, /* can - us */ | |
76 | O|NO, E|NO, E|NO, O|NO, E|NO, O|NO, O|NO, E|NO, /* sp - ' */ | |
77 | E|NO, O|NO, O|NO, E|NO, O|NO, E|NO, E|NO, O|NO, /* ( - / */ | |
78 | E|NA, O|NA, O|NA, E|NA, O|NA, E|NA, E|NA, O|NA, /* 0 - 7 */ | |
79 | O|NA, E|NA, E|NO, O|NO, E|NO, O|NO, O|NO, E|NO, /* 8 - ? */ | |
80 | O|NO, E|NA, E|NA, O|NA, E|NA, O|NA, O|NA, E|NA, /* @ - G */ | |
81 | E|NA, O|NA, O|NA, E|NA, O|NA, E|NA, E|NA, O|NA, /* H - O */ | |
82 | E|NA, O|NA, O|NA, E|NA, O|NA, E|NA, E|NA, O|NA, /* P - W */ | |
83 | O|NA, E|NA, E|NA, O|NO, E|NO, O|NO, O|NO, O|NA, /* X - _ */ | |
84 | E|NO, O|NA, O|NA, E|NA, O|NA, E|NA, E|NA, O|NA, /* ` - g */ | |
85 | O|NA, E|NA, E|NA, O|NA, E|NA, O|NA, O|NA, E|NA, /* h - o */ | |
86 | O|NA, E|NA, E|NA, O|NA, E|NA, O|NA, O|NA, E|NA, /* p - w */ | |
87 | E|NA, O|NA, O|NA, E|NO, O|NO, E|NO, E|NO, O|CC, /* x - del */ | |
8bba2b8f | 88 | /* |
d554174a MK |
89 | * "meta" chars; should be settable per charset. |
90 | * For now, treat all as normal characters. | |
8bba2b8f | 91 | */ |
d554174a MK |
92 | NA, NA, NA, NA, NA, NA, NA, NA, |
93 | NA, NA, NA, NA, NA, NA, NA, NA, | |
94 | NA, NA, NA, NA, NA, NA, NA, NA, | |
95 | NA, NA, NA, NA, NA, NA, NA, NA, | |
96 | NA, NA, NA, NA, NA, NA, NA, NA, | |
97 | NA, NA, NA, NA, NA, NA, NA, NA, | |
98 | NA, NA, NA, NA, NA, NA, NA, NA, | |
99 | NA, NA, NA, NA, NA, NA, NA, NA, | |
100 | NA, NA, NA, NA, NA, NA, NA, NA, | |
101 | NA, NA, NA, NA, NA, NA, NA, NA, | |
102 | NA, NA, NA, NA, NA, NA, NA, NA, | |
103 | NA, NA, NA, NA, NA, NA, NA, NA, | |
104 | NA, NA, NA, NA, NA, NA, NA, NA, | |
105 | NA, NA, NA, NA, NA, NA, NA, NA, | |
106 | NA, NA, NA, NA, NA, NA, NA, NA, | |
107 | NA, NA, NA, NA, NA, NA, NA, NA, | |
89dc6dfb | 108 | }; |
d554174a MK |
109 | #undef NO |
110 | #undef NA | |
111 | #undef CC | |
112 | #undef BS | |
113 | #undef NL | |
114 | #undef TB | |
115 | #undef VT | |
116 | #undef CR | |
89dc6dfb | 117 | |
adf4bc89 | 118 | extern struct tty *constty; /* temporary virtual console */ |
2c6a4e11 | 119 | |
e39f9ea6 MT |
120 | /* |
121 | * Is 'c' a line delimiter ("break" character)? | |
122 | */ | |
09b836aa MK |
123 | #define ttbreakc(c) ((c) == '\n' || ((c) == cc[VEOF] || \ |
124 | (c) == cc[VEOL] || (c) == cc[VEOL2]) && (c) != _POSIX_VDISABLE) | |
e39f9ea6 | 125 | |
2c6a4e11 MT |
126 | /* |
127 | * Debugging aids | |
128 | */ | |
129 | #define dprintf if (tp->t_trace & TTRACE_IO)printf | |
130 | ||
131 | /* | |
132 | * Is 'c' a line delimiter ("break" character)? | |
133 | */ | |
134 | #define ttbreakc(c) (c == '\n' || CCEQ(cc[VEOF], c) || \ | |
135 | CCEQ(cc[VEOL], c) || CCEQ(cc[VEOL2], c)) | |
adf4bc89 | 136 | |
89dc6dfb | 137 | ttychars(tp) |
becb115c | 138 | struct tty *tp; |
89dc6dfb | 139 | { |
3789a403 | 140 | |
2c6a4e11 | 141 | bcopy(ttydefchars, tp->t_cc, sizeof(ttydefchars)); |
89dc6dfb BJ |
142 | } |
143 | ||
144 | /* | |
2c6a4e11 | 145 | * |
d554174a | 146 | * Flush tty after output has drained. |
89dc6dfb | 147 | */ |
88a7a62a | 148 | ttywflush(tp) |
66ad69d6 | 149 | struct tty *tp; |
89dc6dfb | 150 | { |
09b836aa | 151 | int error; |
89dc6dfb | 152 | |
09b836aa MK |
153 | if ((error = ttywait(tp)) == 0) |
154 | ttyflush(tp, FREAD); | |
155 | return (error); | |
88a7a62a SL |
156 | } |
157 | ||
e39f9ea6 MT |
158 | /* |
159 | * Wait for output to drain. | |
160 | */ | |
2c6a4e11 MT |
161 | /* |
162 | * Wait for output to drain. | |
163 | */ | |
88a7a62a SL |
164 | ttywait(tp) |
165 | register struct tty *tp; | |
166 | { | |
09b836aa | 167 | int error = 0, s = spltty(); |
88a7a62a | 168 | |
5de287d9 | 169 | while ((tp->t_outq.c_cc || tp->t_state&TS_BUSY) && |
66ad69d6 MT |
170 | (tp->t_state&TS_CARR_ON || tp->t_cflag&CLOCAL) && |
171 | tp->t_oproc) { | |
50e2732b | 172 | (*tp->t_oproc)(tp); |
941944c9 | 173 | tp->t_state |= TS_ASLEEP; |
eea83fd3 MT |
174 | if (error = ttysleep(tp, (caddr_t)&tp->t_outq, |
175 | TTOPRI | PCATCH, ttyout, 0)) | |
09b836aa | 176 | break; |
50e2732b | 177 | } |
875a1e2c | 178 | splx(s); |
09b836aa | 179 | return (error); |
89dc6dfb BJ |
180 | } |
181 | ||
b50ead57 CT |
182 | #define flushq(q) { \ |
183 | if ((q)->c_cc) \ | |
184 | ndflush(q, (q)->c_cc); \ | |
d554174a MK |
185 | } |
186 | ||
89dc6dfb | 187 | /* |
d554174a MK |
188 | * Flush TTY read and/or write queues, |
189 | * notifying anyone waiting. | |
89dc6dfb | 190 | */ |
88a7a62a | 191 | ttyflush(tp, rw) |
4b72e2f9 | 192 | register struct tty *tp; |
b50ead57 | 193 | int rw; |
89dc6dfb | 194 | { |
b50ead57 | 195 | register int s; |
50e2732b | 196 | |
4f3a716e | 197 | s = spltty(); |
50e2732b | 198 | if (rw & FREAD) { |
d554174a MK |
199 | flushq(&tp->t_canq); |
200 | flushq(&tp->t_rawq); | |
201 | tp->t_rocount = 0; | |
202 | tp->t_rocol = 0; | |
203 | tp->t_state &= ~TS_LOCAL; | |
66ad69d6 | 204 | ttwakeup(tp); |
50e2732b BJ |
205 | } |
206 | if (rw & FWRITE) { | |
941944c9 | 207 | tp->t_state &= ~TS_TTSTOP; |
b50ead57 CT |
208 | #ifdef sun4c /* XXX */ |
209 | (*tp->t_stop)(tp, rw); | |
210 | #else | |
39697bd8 | 211 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, rw); |
b50ead57 | 212 | #endif |
d554174a MK |
213 | flushq(&tp->t_outq); |
214 | wakeup((caddr_t)&tp->t_outq); | |
77f9c500 | 215 | selwakeup(&tp->t_wsel); |
50e2732b BJ |
216 | } |
217 | splx(s); | |
89dc6dfb BJ |
218 | } |
219 | ||
50e2732b BJ |
220 | /* |
221 | * Send stop character on input overflow. | |
222 | */ | |
223 | ttyblock(tp) | |
4b72e2f9 | 224 | register struct tty *tp; |
89dc6dfb | 225 | { |
50e2732b | 226 | register x; |
becb115c | 227 | |
50e2732b BJ |
228 | x = tp->t_rawq.c_cc + tp->t_canq.c_cc; |
229 | if (tp->t_rawq.c_cc > TTYHOG) { | |
88a7a62a | 230 | ttyflush(tp, FREAD|FWRITE); |
941944c9 | 231 | tp->t_state &= ~TS_TBLOCK; |
50e2732b | 232 | } |
600d5712 MK |
233 | /* |
234 | * Block further input iff: | |
235 | * Current input > threshold AND input is available to user program | |
236 | */ | |
96ea38ce | 237 | if (x >= TTYHOG/2 && (tp->t_state & TS_TBLOCK) == 0 && |
2c6a4e11 MT |
238 | (!(tp->t_lflag&ICANON)) || (tp->t_canq.c_cc > 0) && |
239 | tp->t_cc[VSTOP] != POSIX_V_DISABLE) { | |
240 | if (putc(tp->t_cc[VSTOP], &tp->t_outq)==0) { | |
600d5712 MK |
241 | tp->t_state |= TS_TBLOCK; |
242 | ttstart(tp); | |
243 | } | |
50e2732b | 244 | } |
89dc6dfb BJ |
245 | } |
246 | ||
3789a403 MK |
247 | ttstart(tp) |
248 | struct tty *tp; | |
249 | { | |
250 | ||
251 | if (tp->t_oproc) /* kludge for pty */ | |
252 | (*tp->t_oproc)(tp); | |
253 | } | |
254 | ||
255 | ttrstrt(tp) /* XXX */ | |
66ad69d6 | 256 | struct tty *tp; |
101ba270 | 257 | { |
b50ead57 | 258 | int s; |
101ba270 | 259 | |
09b836aa | 260 | #ifdef DIAGNOSTIC |
becb115c SL |
261 | if (tp == 0) |
262 | panic("ttrstrt"); | |
09b836aa | 263 | #endif |
b50ead57 | 264 | s = spltty(); |
941944c9 | 265 | tp->t_state &= ~TS_TIMEOUT; |
50e2732b | 266 | ttstart(tp); |
b50ead57 | 267 | splx(s); |
101ba270 BJ |
268 | } |
269 | ||
89dc6dfb BJ |
270 | |
271 | /* | |
d554174a MK |
272 | * Common code for ioctls on tty devices. |
273 | * Called after line-discipline-specific ioctl | |
274 | * has been called to do discipline-specific functions | |
275 | * and/or reject any of these ioctl commands. | |
89dc6dfb | 276 | */ |
49c84d3f | 277 | /*ARGSUSED*/ |
4b72e2f9 SL |
278 | ttioctl(tp, com, data, flag) |
279 | register struct tty *tp; | |
b50ead57 | 280 | int com; |
4b72e2f9 | 281 | caddr_t data; |
b50ead57 | 282 | int flag; |
89dc6dfb | 283 | { |
3789a403 | 284 | register struct proc *p = curproc; /* XXX */ |
89dc6dfb | 285 | extern int nldisp; |
2c6a4e11 | 286 | int soft; |
849cbd39 | 287 | int s, error; |
89dc6dfb | 288 | |
50e2732b BJ |
289 | /* |
290 | * If the ioctl involves modification, | |
4f3a716e | 291 | * hang if in the background. |
50e2732b | 292 | */ |
4b72e2f9 | 293 | switch (com) { |
50e2732b | 294 | |
2c6a4e11 | 295 | case TIOCSETD: |
50e2732b | 296 | case TIOCFLUSH: |
8203fe05 | 297 | case TIOCSTI: |
f9eea644 | 298 | case TIOCSWINSZ: |
2c6a4e11 MT |
299 | case TIOCSETA: |
300 | case TIOCSETAW: | |
301 | case TIOCSETAF: | |
b50ead57 | 302 | #if defined(COMPAT_43) || defined(COMPAT_SUNOS) |
fa4fb7b0 MT |
303 | case TIOCSETP: |
304 | case TIOCSETN: | |
305 | case TIOCSETC: | |
306 | case TIOCSLTC: | |
307 | case TIOCLBIS: | |
308 | case TIOCLBIC: | |
309 | case TIOCLSET: | |
310 | case OTIOCSETD: | |
311 | #endif | |
3789a403 MK |
312 | while (isbackground(curproc, tp) && |
313 | p->p_pgrp->pg_jobc && (p->p_flag&SPPWAIT) == 0 && | |
314 | (p->p_sigignore & sigmask(SIGTTOU)) == 0 && | |
315 | (p->p_sigmask & sigmask(SIGTTOU)) == 0) { | |
316 | pgsignal(p->p_pgrp, SIGTTOU, 1); | |
eea83fd3 MT |
317 | if (error = ttysleep(tp, (caddr_t)&lbolt, |
318 | TTOPRI | PCATCH, ttybg, 0)) | |
09b836aa | 319 | return (error); |
50e2732b BJ |
320 | } |
321 | break; | |
322 | } | |
323 | ||
becb115c SL |
324 | /* |
325 | * Process the ioctl. | |
326 | */ | |
4b72e2f9 | 327 | switch (com) { |
89dc6dfb | 328 | |
fc6972ae | 329 | /* get discipline number */ |
89dc6dfb | 330 | case TIOCGETD: |
4b72e2f9 | 331 | *(int *)data = tp->t_line; |
89dc6dfb BJ |
332 | break; |
333 | ||
fc6972ae | 334 | /* set line discipline */ |
4b72e2f9 SL |
335 | case TIOCSETD: { |
336 | register int t = *(int *)data; | |
2c6a4e11 | 337 | dev_t dev = tp->t_dev; |
e39f9ea6 | 338 | dev_t dev = tp->t_dev; |
4b72e2f9 | 339 | |
e39f9ea6 | 340 | if ((unsigned)t >= nldisp) |
4a003df3 | 341 | return (ENXIO); |
2eaeef4d MK |
342 | if (t != tp->t_line) { |
343 | s = spltty(); | |
adacc19e | 344 | (*linesw[tp->t_line].l_close)(tp, flag); |
2eaeef4d MK |
345 | error = (*linesw[t].l_open)(dev, tp); |
346 | if (error) { | |
2c6a4e11 | 347 | (void)(*linesw[tp->t_line].l_open)(dev, tp); |
2eaeef4d MK |
348 | splx(s); |
349 | return (error); | |
350 | } | |
351 | tp->t_line = t; | |
4a003df3 | 352 | splx(s); |
4a003df3 | 353 | } |
2c6a4e11 MT |
354 | if (tp->t_trace & TTRACE_STATE) |
355 | ttytrace(com, tp); | |
89dc6dfb | 356 | break; |
4b72e2f9 | 357 | } |
89dc6dfb | 358 | |
fc6972ae | 359 | /* prevent more opens on channel */ |
152c2598 | 360 | case TIOCEXCL: |
b50ead57 | 361 | s = spltty(); |
152c2598 | 362 | tp->t_state |= TS_XCLUDE; |
b50ead57 | 363 | splx(s); |
152c2598 BJ |
364 | break; |
365 | ||
366 | case TIOCNXCL: | |
b50ead57 | 367 | s = spltty(); |
152c2598 | 368 | tp->t_state &= ~TS_XCLUDE; |
b50ead57 | 369 | splx(s); |
152c2598 BJ |
370 | break; |
371 | ||
b50ead57 | 372 | #ifdef TIOCHPCL |
89dc6dfb | 373 | case TIOCHPCL: |
b50ead57 | 374 | s = spltty(); |
2c6a4e11 | 375 | tp->t_cflag |= HUPCL; |
89dc6dfb | 376 | break; |
b50ead57 | 377 | #endif |
89dc6dfb | 378 | |
7d973a4d | 379 | case TIOCFLUSH: { |
4b72e2f9 SL |
380 | register int flags = *(int *)data; |
381 | ||
382 | if (flags == 0) | |
7d973a4d | 383 | flags = FREAD|FWRITE; |
4b72e2f9 SL |
384 | else |
385 | flags &= FREAD|FWRITE; | |
88a7a62a | 386 | ttyflush(tp, flags); |
89dc6dfb | 387 | break; |
4568c08e | 388 | } |
89dc6dfb | 389 | |
66ad69d6 | 390 | case FIOASYNC: |
b50ead57 | 391 | s = spltty(); |
66ad69d6 MT |
392 | if (*(int *)data) |
393 | tp->t_state |= TS_ASYNC; | |
394 | else | |
395 | tp->t_state &= ~TS_ASYNC; | |
b50ead57 | 396 | splx(s); |
66ad69d6 MT |
397 | break; |
398 | ||
399 | case FIONBIO: | |
400 | break; /* XXX remove */ | |
401 | ||
fc6972ae | 402 | /* return number of characters immediately available */ |
4b72e2f9 SL |
403 | case FIONREAD: |
404 | *(off_t *)data = ttnread(tp); | |
8062c8a7 | 405 | break; |
8062c8a7 | 406 | |
b968e450 SL |
407 | case TIOCOUTQ: |
408 | *(int *)data = tp->t_outq.c_cc; | |
409 | break; | |
410 | ||
a8d3bf7f | 411 | case TIOCSTOP: |
4f3a716e | 412 | s = spltty(); |
becb115c | 413 | if ((tp->t_state&TS_TTSTOP) == 0) { |
bfcf09ee | 414 | tp->t_state |= TS_TTSTOP; |
b50ead57 CT |
415 | #ifdef sun4c /* XXX */ |
416 | (*tp->t_stop)(tp, 0); | |
417 | #else | |
bfcf09ee | 418 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); |
b50ead57 | 419 | #endif |
bfcf09ee | 420 | } |
4b72e2f9 | 421 | splx(s); |
bfcf09ee BJ |
422 | break; |
423 | ||
a8d3bf7f | 424 | case TIOCSTART: |
4f3a716e | 425 | s = spltty(); |
2c6a4e11 | 426 | if ((tp->t_state&TS_TTSTOP) || (tp->t_lflag&FLUSHO)) { |
bfcf09ee | 427 | tp->t_state &= ~TS_TTSTOP; |
2c6a4e11 | 428 | tp->t_lflag &= ~FLUSHO; |
bfcf09ee BJ |
429 | ttstart(tp); |
430 | } | |
4b72e2f9 | 431 | splx(s); |
bfcf09ee BJ |
432 | break; |
433 | ||
8203fe05 SL |
434 | /* |
435 | * Simulate typing of a character at the terminal. | |
436 | */ | |
437 | case TIOCSTI: | |
3789a403 | 438 | if (p->p_ucred->cr_uid && (flag & FREAD) == 0) |
477d62ec | 439 | return (EPERM); |
3789a403 | 440 | if (p->p_ucred->cr_uid && !isctty(p, tp)) |
8203fe05 | 441 | return (EACCES); |
becb115c | 442 | (*linesw[tp->t_line].l_rint)(*(char *)data, tp); |
8203fe05 SL |
443 | break; |
444 | ||
2c6a4e11 MT |
445 | case TIOCGETA: { |
446 | struct termios *t = (struct termios *)data; | |
447 | bcopy(&tp->t_termio, t, sizeof(struct termios)); | |
448 | if (tp->t_trace & TTRACE_STATE) | |
449 | ttytrace(com, tp); | |
450 | break; | |
451 | } | |
452 | ||
2c6a4e11 MT |
453 | if (com == TIOCSETAF || com == TIOCSETAFS) |
454 | ttywflush(tp); | |
455 | else { | |
456 | if (com == TIOCSETAW || com == TIOCSETAWS) | |
457 | ttywait(tp); | |
458 | if ((t->c_lflag&ICANON) != (tp->t_lflag&ICANON)) | |
459 | if (t->c_lflag&ICANON) { | |
460 | tp->t_lflag |= PENDIN; | |
461 | ttwakeup(tp); | |
462 | } | |
463 | else { | |
464 | struct clist tq; | |
465 | ||
466 | catq(&tp->t_rawq, &tp->t_canq); | |
467 | tq = tp->t_rawq; | |
468 | tp->t_rawq = tp->t_canq; | |
469 | tp->t_canq = tq; | |
470 | } | |
88a7a62a | 471 | } |
2c6a4e11 MT |
472 | tp->t_iflag = t->c_iflag; |
473 | tp->t_oflag = t->c_oflag; | |
474 | tp->t_lflag = t->c_lflag; | |
475 | bcopy(t->c_cc, tp->t_cc, sizeof(t->c_cc)); | |
476 | if (!soft) { | |
477 | tp->t_cflag = t->c_cflag; | |
478 | tp->t_ispeed = t->c_ispeed; | |
479 | tp->t_ospeed = t->c_ospeed; | |
88a7a62a | 480 | } |
e39f9ea6 MT |
481 | tp->t_iflag = t->c_iflag; |
482 | tp->t_oflag = t->c_oflag; | |
face72c1 MT |
483 | /* |
484 | * Make the EXTPROC bit read only. | |
485 | */ | |
486 | if (tp->t_lflag&EXTPROC) | |
487 | t->c_lflag |= EXTPROC; | |
488 | else | |
489 | t->c_lflag &= ~EXTPROC; | |
e39f9ea6 MT |
490 | tp->t_lflag = t->c_lflag; |
491 | bcopy(t->c_cc, tp->t_cc, sizeof(t->c_cc)); | |
88a7a62a | 492 | splx(s); |
2c6a4e11 MT |
493 | if (tp->t_trace & TTRACE_STATE) |
494 | ttytrace(com, tp); | |
88a7a62a SL |
495 | break; |
496 | } | |
497 | ||
4f3a716e | 498 | /* |
e39f9ea6 | 499 | * Set terminal process group. |
4f3a716e | 500 | */ |
245aeefa | 501 | case TIOCSPGRP: { |
e39f9ea6 MT |
502 | register struct pgrp *pgrp = pgfind(*(int *)data); |
503 | ||
232c0273 MT |
504 | if (!isctty(p, tp)) |
505 | return (ENOTTY); | |
fa4fb7b0 | 506 | else if (pgrp == NULL || pgrp->pg_session != p->p_session) |
232c0273 MT |
507 | return (EPERM); |
508 | tp->t_pgrp = pgrp; | |
88a7a62a | 509 | break; |
245aeefa | 510 | } |
88a7a62a SL |
511 | |
512 | case TIOCGPGRP: | |
3789a403 | 513 | if (!isctty(p, tp)) |
232c0273 | 514 | return (ENOTTY); |
500e26a6 | 515 | *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; |
88a7a62a SL |
516 | break; |
517 | ||
f9eea644 | 518 | case TIOCSWINSZ: |
245aeefa JB |
519 | if (bcmp((caddr_t)&tp->t_winsize, data, |
520 | sizeof (struct winsize))) { | |
f9eea644 | 521 | tp->t_winsize = *(struct winsize *)data; |
face72c1 | 522 | pgsignal(tp->t_pgrp, SIGWINCH, 1); |
f9eea644 JB |
523 | } |
524 | break; | |
525 | ||
526 | case TIOCGWINSZ: | |
527 | *(struct winsize *)data = tp->t_winsize; | |
528 | break; | |
529 | ||
adf4bc89 MK |
530 | case TIOCCONS: |
531 | if (*(int *)data) { | |
c0d5efb1 KM |
532 | if (constty && constty != tp && |
533 | (constty->t_state & (TS_CARR_ON|TS_ISOPEN)) == | |
534 | (TS_CARR_ON|TS_ISOPEN)) | |
adf4bc89 MK |
535 | return (EBUSY); |
536 | #ifndef UCONSOLE | |
3789a403 | 537 | if (error = suser(p->p_ucred, &p->p_acflag)) |
849cbd39 | 538 | return (error); |
adf4bc89 MK |
539 | #endif |
540 | constty = tp; | |
541 | } else if (tp == constty) | |
1eebc1a7 | 542 | constty = NULL; |
adf4bc89 MK |
543 | break; |
544 | ||
6cec2da2 MK |
545 | case TIOCDRAIN: |
546 | if (error = ttywait(tp)) | |
547 | return (error); | |
548 | break; | |
549 | ||
2c6a4e11 MT |
550 | /* allow old ioctls for now */ |
551 | case TIOCGETP: | |
552 | case TIOCSETP: | |
553 | case TIOCSETN: | |
554 | case TIOCGETC: | |
555 | case TIOCSETC: | |
556 | case TIOCSLTC: | |
557 | case TIOCGLTC: | |
558 | case TIOCLBIS: | |
559 | case TIOCLBIC: | |
560 | case TIOCLSET: | |
561 | case TIOCLGET: | |
562 | return(ottioctl(tp, com, data, flag)); | |
563 | ||
89dc6dfb | 564 | default: |
b50ead57 | 565 | #if defined(COMPAT_43) || defined(COMPAT_SUNOS) |
3789a403 MK |
566 | return (ttcompat(tp, com, data, flag)); |
567 | #else | |
fc6972ae | 568 | return (-1); |
3789a403 | 569 | #endif |
89dc6dfb | 570 | } |
fc6972ae | 571 | return (0); |
89dc6dfb | 572 | } |
e1d74936 | 573 | |
2c6a4e11 MT |
574 | /* |
575 | * DEBUG - to be removed | |
576 | */ | |
577 | ttytrace(ioc, tp) | |
578 | struct tty *tp; | |
579 | { | |
580 | register u_char *cc = tp->t_cc; | |
581 | char comm[MAXCOMLEN+1]; | |
582 | static int seq = 0; | |
583 | ||
584 | bcopy(u.u_comm, comm, MAXCOMLEN+1); | |
585 | comm[MAXCOMLEN] = '\0'; | |
586 | ||
587 | /* trace changes to line disciplines */ | |
588 | if (ioc == TIOCSETD) { | |
589 | log(LOG_LOCAL4|LOG_DEBUG, "%s:%x:%x:%x:%x\n", | |
590 | comm, ioc, u.u_procp->p_pid, tp->t_dev, tp->t_line); | |
591 | return; | |
592 | } | |
593 | ||
594 | /* | |
595 | * format for the trace record is: | |
596 | * | |
597 | * u_comm:ioctl:pid:dev_t:ldisc:iflag:oflag:lflag:cflag:ispeed: | |
598 | * ospeed:cc's...:seq | |
599 | * | |
600 | * u_comm is a string and all other values are hex. "cc's..." | |
601 | * stands for control chars 0 through NCC-1. seq is a sequence # | |
602 | * to force syslogd to log every entry (rather than hold them to | |
603 | * print "last message repeated...". | |
604 | */ | |
605 | log(LOG_LOCAL4|LOG_DEBUG, "%s:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x:%x\n", | |
606 | comm, ioc, u.u_procp->p_pid, tp->t_dev, tp->t_line, | |
607 | tp->t_iflag, tp->t_oflag, tp->t_lflag, tp->t_cflag, | |
608 | tp->t_ispeed, tp->t_ospeed, cc[0], cc[1], cc[2], cc[3], | |
609 | cc[4], cc[5], cc[6], cc[7], cc[8], cc[9], cc[10], cc[11], | |
610 | cc[12], cc[13], cc[14], cc[15], cc[16], cc[17], cc[18], | |
611 | cc[19], seq++); | |
612 | } | |
613 | ||
e1d74936 BJ |
614 | ttnread(tp) |
615 | struct tty *tp; | |
616 | { | |
617 | int nread = 0; | |
618 | ||
2c6a4e11 | 619 | if (tp->t_lflag & PENDIN) |
e1d74936 BJ |
620 | ttypend(tp); |
621 | nread = tp->t_canq.c_cc; | |
2c6a4e11 | 622 | if (tp->t_lflag & ICANON == 0) |
e1d74936 BJ |
623 | nread += tp->t_rawq.c_cc; |
624 | return (nread); | |
625 | } | |
626 | ||
77f9c500 | 627 | ttselect(dev, rw, p) |
e1d74936 | 628 | dev_t dev; |
941944c9 | 629 | int rw; |
77f9c500 | 630 | struct proc *p; |
e1d74936 BJ |
631 | { |
632 | register struct tty *tp = &cdevsw[major(dev)].d_ttys[minor(dev)]; | |
633 | int nread; | |
4f3a716e | 634 | int s = spltty(); |
e1d74936 | 635 | |
941944c9 | 636 | switch (rw) { |
e1d74936 BJ |
637 | |
638 | case FREAD: | |
639 | nread = ttnread(tp); | |
66ad69d6 | 640 | if (nread > 0 || |
09b836aa | 641 | ((tp->t_cflag&CLOCAL) == 0 && (tp->t_state&TS_CARR_ON) == 0)) |
941944c9 | 642 | goto win; |
77f9c500 | 643 | selrecord(p, &tp->t_rsel); |
941944c9 | 644 | break; |
e1d74936 | 645 | |
941944c9 | 646 | case FWRITE: |
e39f9ea6 | 647 | if (tp->t_outq.c_cc <= tp->t_lowat) |
941944c9 | 648 | goto win; |
77f9c500 | 649 | selrecord(p, &tp->t_wsel); |
941944c9 | 650 | break; |
e1d74936 | 651 | } |
941944c9 BJ |
652 | splx(s); |
653 | return (0); | |
654 | win: | |
655 | splx(s); | |
656 | return (1); | |
e1d74936 | 657 | } |
8bba2b8f | 658 | |
4147b3f6 | 659 | /* |
d554174a | 660 | * Initial open of tty, or (re)entry to standard tty line discipline. |
4147b3f6 BJ |
661 | */ |
662 | ttyopen(dev, tp) | |
4b72e2f9 SL |
663 | dev_t dev; |
664 | register struct tty *tp; | |
4147b3f6 | 665 | { |
b50ead57 | 666 | int s = spltty(); |
4147b3f6 | 667 | |
4147b3f6 | 668 | tp->t_dev = dev; |
e39f9ea6 | 669 | |
4147b3f6 | 670 | tp->t_state &= ~TS_WOPEN; |
4f3a716e MK |
671 | if ((tp->t_state & TS_ISOPEN) == 0) { |
672 | tp->t_state |= TS_ISOPEN; | |
f9eea644 | 673 | bzero((caddr_t)&tp->t_winsize, sizeof(tp->t_winsize)); |
2c6a4e11 MT |
674 | /* |
675 | * CHANGE: used to do a ttywflush() if it was the | |
676 | * old (old) line discipline. | |
677 | */ | |
4f3a716e | 678 | } |
b50ead57 | 679 | splx(s); |
fc6972ae | 680 | return (0); |
4147b3f6 BJ |
681 | } |
682 | ||
605d7712 MK |
683 | /* |
684 | * "close" a line discipline | |
685 | */ | |
adacc19e MT |
686 | ttylclose(tp, flag) |
687 | struct tty *tp; | |
688 | int flag; | |
605d7712 MK |
689 | { |
690 | ||
adacc19e MT |
691 | if (flag&IO_NDELAY) |
692 | ttyflush(tp, FREAD|FWRITE); | |
693 | else | |
694 | ttywflush(tp); | |
605d7712 MK |
695 | } |
696 | ||
4147b3f6 | 697 | /* |
d554174a MK |
698 | * Handle close() on a tty line: flush and set to initial state, |
699 | * bumping generation number so that pending read/write calls | |
700 | * can detect recycling of the tty. | |
4147b3f6 BJ |
701 | */ |
702 | ttyclose(tp) | |
4b72e2f9 | 703 | register struct tty *tp; |
4147b3f6 | 704 | { |
adf4bc89 MK |
705 | if (constty == tp) |
706 | constty = NULL; | |
605d7712 | 707 | ttyflush(tp, FREAD|FWRITE); |
232c0273 MT |
708 | tp->t_session = NULL; |
709 | tp->t_pgrp = NULL; | |
4147b3f6 | 710 | tp->t_state = 0; |
eea83fd3 | 711 | tp->t_gen++; |
09b836aa | 712 | return (0); |
4147b3f6 BJ |
713 | } |
714 | ||
605d7712 MK |
715 | /* |
716 | * Handle modem control transition on a tty. | |
717 | * Flag indicates new state of carrier. | |
718 | * Returns 0 if the line should be turned off, otherwise 1. | |
719 | */ | |
720 | ttymodem(tp, flag) | |
721 | register struct tty *tp; | |
b50ead57 | 722 | int flag; |
605d7712 MK |
723 | { |
724 | ||
2c6a4e11 | 725 | if ((tp->t_state&TS_WOPEN) == 0 && (tp->t_lflag & MDMBUF)) { |
605d7712 MK |
726 | /* |
727 | * MDMBUF: do flow control according to carrier flag | |
728 | */ | |
729 | if (flag) { | |
730 | tp->t_state &= ~TS_TTSTOP; | |
731 | ttstart(tp); | |
732 | } else if ((tp->t_state&TS_TTSTOP) == 0) { | |
733 | tp->t_state |= TS_TTSTOP; | |
b50ead57 CT |
734 | #ifdef sun4c /* XXX */ |
735 | (*tp->t_stop)(tp, 0); | |
736 | #else | |
605d7712 | 737 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); |
b50ead57 | 738 | #endif |
605d7712 MK |
739 | } |
740 | } else if (flag == 0) { | |
741 | /* | |
742 | * Lost carrier. | |
743 | */ | |
744 | tp->t_state &= ~TS_CARR_ON; | |
992909a0 MT |
745 | if (tp->t_state&TS_ISOPEN && (tp->t_cflag&CLOCAL) == 0) { |
746 | if (tp->t_session && tp->t_session->s_leader) | |
747 | psignal(tp->t_session->s_leader, SIGHUP); | |
748 | ttyflush(tp, FREAD|FWRITE); | |
749 | return (0); | |
605d7712 MK |
750 | } |
751 | } else { | |
752 | /* | |
753 | * Carrier now on. | |
754 | */ | |
755 | tp->t_state |= TS_CARR_ON; | |
66ad69d6 | 756 | ttwakeup(tp); |
605d7712 MK |
757 | } |
758 | return (1); | |
759 | } | |
760 | ||
e3f2038d MK |
761 | /* |
762 | * Default modem control routine (for other line disciplines). | |
763 | * Return argument flag, to turn off device on carrier drop. | |
764 | */ | |
2f54b5e8 MK |
765 | nullmodem(tp, flag) |
766 | register struct tty *tp; | |
e3f2038d MK |
767 | int flag; |
768 | { | |
769 | ||
770 | if (flag) | |
771 | tp->t_state |= TS_CARR_ON; | |
52004850 | 772 | else { |
e3f2038d | 773 | tp->t_state &= ~TS_CARR_ON; |
992909a0 MT |
774 | if ((tp->t_cflag&CLOCAL) == 0) { |
775 | if (tp->t_session && tp->t_session->s_leader) | |
776 | psignal(tp->t_session->s_leader, SIGHUP); | |
777 | return (0); | |
778 | } | |
52004850 | 779 | } |
992909a0 | 780 | return (1); |
e3f2038d MK |
781 | } |
782 | ||
4147b3f6 BJ |
783 | /* |
784 | * reinput pending characters after state switch | |
4f3a716e | 785 | * call at spltty(). |
4147b3f6 BJ |
786 | */ |
787 | ttypend(tp) | |
4b72e2f9 | 788 | register struct tty *tp; |
4147b3f6 BJ |
789 | { |
790 | struct clist tq; | |
791 | register c; | |
792 | ||
2c6a4e11 | 793 | tp->t_lflag &= ~PENDIN; |
becb115c | 794 | tp->t_state |= TS_TYPEN; |
4147b3f6 BJ |
795 | tq = tp->t_rawq; |
796 | tp->t_rawq.c_cc = 0; | |
797 | tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0; | |
798 | while ((c = getc(&tq)) >= 0) | |
799 | ttyinput(c, tp); | |
becb115c | 800 | tp->t_state &= ~TS_TYPEN; |
4147b3f6 BJ |
801 | } |
802 | ||
803 | /* | |
d554174a | 804 | * Process input of a single character received on a tty. |
4147b3f6 BJ |
805 | */ |
806 | ttyinput(c, tp) | |
4b72e2f9 SL |
807 | register c; |
808 | register struct tty *tp; | |
4147b3f6 | 809 | { |
2c6a4e11 MT |
810 | register int iflag = tp->t_iflag; |
811 | register int lflag = tp->t_lflag; | |
812 | register u_char *cc = tp->t_cc; | |
813 | int i, err; | |
4147b3f6 | 814 | |
becb115c SL |
815 | /* |
816 | * If input is pending take it first. | |
817 | */ | |
2c6a4e11 | 818 | if (lflag&PENDIN) |
4147b3f6 | 819 | ttypend(tp); |
e39f9ea6 MT |
820 | /* |
821 | * Gather stats. | |
822 | */ | |
2c6a4e11 | 823 | |
4147b3f6 | 824 | tk_nin++; |
e39f9ea6 MT |
825 | if (lflag&ICANON) { |
826 | tk_cancc++; | |
827 | tp->t_cancc++; | |
828 | } else { | |
829 | tk_rawcc++; | |
830 | tp->t_rawcc++; | |
831 | } | |
becb115c | 832 | /* |
2c6a4e11 | 833 | * Handle exceptional conditions (break, parity, framing). |
becb115c | 834 | */ |
2c6a4e11 MT |
835 | if (err = (c&TTY_ERRORMASK)) { |
836 | c &= TTY_CHARMASK; | |
837 | if (err&TTY_FE && !c) { /* break */ | |
838 | if (iflag&IGNBRK) | |
839 | goto endcase; | |
840 | else if (iflag&BRKINT && lflag&ISIG && | |
841 | (cc[VINTR] != POSIX_V_DISABLE)) | |
842 | c = cc[VINTR]; | |
843 | else | |
844 | c = 0; | |
845 | } else if ((err&TTY_PE && iflag&INPCK) || err&TTY_FE) { | |
846 | if (iflag&IGNPAR) | |
847 | goto endcase; | |
848 | else if (iflag&PARMRK) { | |
849 | ttyinput(0377, tp); | |
850 | ttyinput(0, tp); | |
851 | } else | |
852 | c = 0; | |
4147b3f6 | 853 | } |
becb115c | 854 | } |
2c6a4e11 MT |
855 | dprintf("<%o>\n", c); |
856 | ||
857 | /* | |
858 | * In tandem mode, check high water mark. | |
859 | */ | |
860 | if (iflag&IXOFF) | |
861 | ttyblock(tp); | |
862 | ||
becb115c | 863 | /* |
e39f9ea6 | 864 | * In tandem mode, check high water mark. |
becb115c | 865 | */ |
2c6a4e11 | 866 | if ((tp->t_state&TS_TYPEN) == 0 && (iflag&ISTRIP)) |
d554174a | 867 | c &= ~0x80; |
2c6a4e11 MT |
868 | |
869 | /* | |
870 | * Extensions to POSIX input modes which aren't controlled | |
871 | * by ICANON, ISIG, or IXON. | |
872 | */ | |
873 | if (iflag&IEXTEN) { | |
874 | if (CCEQ(cc[VLNEXT],c) && (iflag&ISTRIP)) { | |
875 | if (lflag&ECHO) | |
876 | ttyout("^\b", tp); /*XXX - presumes too much */ | |
becb115c | 877 | } |
e6745ca3 MT |
878 | /* |
879 | * Signals. | |
880 | */ | |
881 | if (lflag&ISIG) { | |
882 | if (CCEQ(cc[VINTR], c) || CCEQ(cc[VQUIT], c)) { | |
883 | if ((lflag&NOFLSH) == 0) | |
884 | ttyflush(tp, FREAD|FWRITE); | |
4147b3f6 | 885 | ttyecho(c, tp); |
2c6a4e11 | 886 | tp->t_lflag |= FLUSHO; |
4147b3f6 | 887 | } |
e6745ca3 MT |
888 | if (CCEQ(cc[VSUSP], c)) { |
889 | if ((lflag&NOFLSH) == 0) | |
890 | ttyflush(tp, FREAD); | |
891 | ttyecho(c, tp); | |
892 | pgsignal(tp->t_pgrp, SIGTSTP, 1); | |
893 | goto endcase; | |
894 | } | |
becb115c | 895 | } |
2c6a4e11 MT |
896 | if (iflag&IXON) { |
897 | if (CCEQ(cc[VSTOP],c)) { | |
898 | if ((tp->t_state&TS_TTSTOP) == 0) { | |
899 | tp->t_state |= TS_TTSTOP; | |
900 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
901 | return; | |
902 | } | |
903 | if (!CCEQ(cc[VSTART], c)) | |
904 | return; | |
905 | /* | |
906 | * if VSTART == VSTOP we toggle | |
907 | */ | |
908 | goto endcase; | |
becb115c | 909 | } |
2c6a4e11 MT |
910 | if (CCEQ(cc[VSTART], c)) |
911 | goto restartoutput; | |
becb115c | 912 | } |
2c6a4e11 MT |
913 | c = unputc(&tp->t_rawq); |
914 | } while (c != ' ' && c != '\t'); | |
915 | (void) putc(c, &tp->t_rawq); | |
916 | goto endcase; | |
917 | } | |
918 | /* | |
919 | * reprint line (^R) | |
920 | */ | |
921 | if (CCEQ(cc[VREPRINT], c)) { | |
922 | ttyretype(tp); | |
923 | goto endcase; | |
becb115c | 924 | } |
becb115c SL |
925 | /* |
926 | * Check for input buffer overflow | |
927 | */ | |
3789a403 | 928 | if (tp->t_rawq.c_cc + tp->t_canq.c_cc >= TTYHOG) { |
2c6a4e11 MT |
929 | if (iflag&IMAXBEL) { |
930 | if (tp->t_outq.c_cc < TTHIWAT(tp)) | |
931 | (void) ttyoutput(CTRL('g'), tp); | |
932 | } else | |
933 | ttyflush(tp, FREAD | FWRITE); | |
becb115c | 934 | goto endcase; |
7c9f96c0 | 935 | } |
becb115c SL |
936 | /* |
937 | * Put data char in q for user and | |
938 | * wakeup on seeing a line delimiter. | |
939 | */ | |
940 | if (putc(c, &tp->t_rawq) >= 0) { | |
3789a403 MK |
941 | if ((lflag&ICANON) == 0) { |
942 | ttwakeup(tp); | |
943 | ttyecho(c, tp); | |
944 | goto endcase; | |
945 | } | |
2c6a4e11 | 946 | if (ttbreakc(c)) { |
becb115c SL |
947 | tp->t_rocount = 0; |
948 | catq(&tp->t_rawq, &tp->t_canq); | |
4147b3f6 | 949 | ttwakeup(tp); |
becb115c SL |
950 | } else if (tp->t_rocount++ == 0) |
951 | tp->t_rocol = tp->t_col; | |
2c6a4e11 MT |
952 | if (CCEQ(cc[VQUOTE], c) && (iflag&ISTRIP)) |
953 | tp->t_state |= TS_QUOT; /* '\' escape */ | |
becb115c | 954 | if (tp->t_state&TS_ERASE) { |
e39f9ea6 MT |
955 | /* |
956 | * end of prterase \.../ | |
957 | */ | |
2c6a4e11 MT |
958 | /* |
959 | * end of prterase \.../ | |
960 | */ | |
becb115c SL |
961 | tp->t_state &= ~TS_ERASE; |
962 | (void) ttyoutput('/', tp); | |
963 | } | |
964 | i = tp->t_col; | |
4147b3f6 | 965 | ttyecho(c, tp); |
2c6a4e11 MT |
966 | if (CCEQ(cc[VEOF], c) && lflag&ECHO) { |
967 | /* | |
968 | * Place the cursor over the '^' of the ^D. | |
969 | */ | |
becb115c SL |
970 | i = MIN(2, tp->t_col - i); |
971 | while (i > 0) { | |
972 | (void) ttyoutput('\b', tp); | |
973 | i--; | |
974 | } | |
975 | } | |
4147b3f6 | 976 | } |
becb115c SL |
977 | endcase: |
978 | /* | |
2c6a4e11 | 979 | * IXANY means allow any character to restart output. |
becb115c | 980 | */ |
2c6a4e11 MT |
981 | if (tp->t_state&TS_TTSTOP && (iflag&IXANY == 0) |
982 | && cc[VSTART] != cc[VSTOP]) | |
4147b3f6 | 983 | return; |
2c6a4e11 | 984 | |
becb115c | 985 | restartoutput: |
4147b3f6 | 986 | tp->t_state &= ~TS_TTSTOP; |
2c6a4e11 | 987 | tp->t_lflag &= ~FLUSHO; |
becb115c | 988 | startoutput: |
4147b3f6 BJ |
989 | ttstart(tp); |
990 | } | |
991 | ||
992 | /* | |
d554174a MK |
993 | * Output a single character on a tty, doing output processing |
994 | * as needed (expanding tabs, newline processing, etc.). | |
995 | * Returns < 0 if putc succeeds, otherwise returns char to resend. | |
4147b3f6 BJ |
996 | * Must be recursive. |
997 | */ | |
998 | ttyoutput(c, tp) | |
999 | register c; | |
1000 | register struct tty *tp; | |
1001 | { | |
d554174a | 1002 | register int col; |
2c6a4e11 MT |
1003 | if (!(tp->t_oflag&OPOST)) { |
1004 | if (tp->t_lflag&FLUSHO) | |
4147b3f6 BJ |
1005 | return (-1); |
1006 | if (putc(c, &tp->t_outq)) | |
4b72e2f9 | 1007 | return (c); |
4147b3f6 | 1008 | tk_nout++; |
e39f9ea6 | 1009 | tp->t_outcc++; |
4147b3f6 BJ |
1010 | return (-1); |
1011 | } | |
2c6a4e11 | 1012 | c &= 0377; |
4147b3f6 | 1013 | /* |
d554174a | 1014 | * Do tab expansion if OXTABS is set. |
face72c1 MT |
1015 | * Special case if we have external processing, we don't |
1016 | * do the tab expansion because we'll probably get it | |
1017 | * wrong. If tab expansion needs to be done, let it | |
1018 | * happen externally. | |
4147b3f6 | 1019 | */ |
2c6a4e11 | 1020 | if (c == '\t' && tp->t_oflag&OXTABS ) { |
4147b3f6 BJ |
1021 | register int s; |
1022 | ||
1023 | c = 8 - (tp->t_col&7); | |
2c6a4e11 | 1024 | if ((tp->t_lflag&FLUSHO) == 0) { |
4f3a716e | 1025 | s = spltty(); /* don't interrupt tabs */ |
4147b3f6 BJ |
1026 | c -= b_to_q(" ", c, &tp->t_outq); |
1027 | tk_nout += c; | |
e39f9ea6 | 1028 | tp->t_outcc += c; |
4147b3f6 BJ |
1029 | splx(s); |
1030 | } | |
1031 | tp->t_col += c; | |
1032 | return (c ? -1 : '\t'); | |
1033 | } | |
e39f9ea6 | 1034 | if (c == CEOT && oflag&ONOEOT) |
3789a403 | 1035 | return (-1); |
4147b3f6 | 1036 | tk_nout++; |
e39f9ea6 | 1037 | tp->t_outcc++; |
2c6a4e11 | 1038 | #ifdef notdef |
4147b3f6 | 1039 | /* |
d554174a MK |
1040 | * Newline translation: if ONLCR is set, |
1041 | * translate newline into "\r\n". | |
4147b3f6 | 1042 | */ |
2c6a4e11 | 1043 | #endif |
e39f9ea6 MT |
1044 | if ((tp->t_lflag&FLUSHO) == 0 && putc(c, &tp->t_outq)) |
1045 | return (c); | |
2c6a4e11 | 1046 | if ((tp->t_lflag&FLUSHO) == 0 && putc(c, &tp->t_outq)) |
4147b3f6 | 1047 | return (c); |
3789a403 | 1048 | |
d554174a MK |
1049 | col = tp->t_col; |
1050 | switch (CCLASS(c)) { | |
4147b3f6 BJ |
1051 | |
1052 | case ORDINARY: | |
d554174a | 1053 | col++; |
4147b3f6 BJ |
1054 | |
1055 | case CONTROL: | |
1056 | break; | |
1057 | ||
1058 | case BACKSPACE: | |
d554174a MK |
1059 | if (col > 0) |
1060 | col--; | |
4147b3f6 BJ |
1061 | break; |
1062 | ||
1063 | case NEWLINE: | |
d554174a | 1064 | col = 0; |
4147b3f6 BJ |
1065 | break; |
1066 | ||
1067 | case TAB: | |
d554174a | 1068 | col = (col + 8) &~ 0x7; |
4147b3f6 BJ |
1069 | break; |
1070 | ||
4147b3f6 | 1071 | case RETURN: |
d554174a | 1072 | col = 0; |
4147b3f6 | 1073 | } |
d554174a | 1074 | tp->t_col = col; |
4147b3f6 BJ |
1075 | return (-1); |
1076 | } | |
1077 | ||
1078 | /* | |
d554174a | 1079 | * Process a read call on a tty device. |
4147b3f6 | 1080 | */ |
66ad69d6 | 1081 | ttread(tp, uio, flag) |
4b72e2f9 | 1082 | register struct tty *tp; |
d6d7360b | 1083 | struct uio *uio; |
b50ead57 | 1084 | int flag; |
4147b3f6 BJ |
1085 | { |
1086 | register struct clist *qp; | |
2c6a4e11 MT |
1087 | register int c, t_flags; |
1088 | register long lflag = tp->t_lflag; | |
1089 | register long iflag = tp->t_iflag; | |
1090 | register u_char *cc = tp->t_cc; | |
875a1e2c | 1091 | int s, first, error = 0; |
4147b3f6 | 1092 | |
2c6a4e11 | 1093 | |
4147b3f6 | 1094 | loop: |
0f12c7be | 1095 | lflag = tp->t_lflag; |
66ad69d6 | 1096 | s = spltty(); |
becb115c | 1097 | /* |
66ad69d6 | 1098 | * take pending input first |
becb115c | 1099 | */ |
2c6a4e11 | 1100 | if (tp->t_lflag&PENDIN) |
4147b3f6 | 1101 | ttypend(tp); |
875a1e2c | 1102 | splx(s); |
09b836aa | 1103 | |
becb115c SL |
1104 | /* |
1105 | * Hang process if it's in the background. | |
1106 | */ | |
3789a403 MK |
1107 | if (isbackground(p, tp)) { |
1108 | if ((p->p_sigignore & sigmask(SIGTTIN)) || | |
1109 | (p->p_sigmask & sigmask(SIGTTIN)) || | |
1110 | p->p_flag&SPPWAIT || p->p_pgrp->pg_jobc == 0) | |
840510a3 | 1111 | return (EIO); |
3789a403 | 1112 | pgsignal(p->p_pgrp, SIGTTIN, 1); |
eea83fd3 MT |
1113 | if (error = ttysleep(tp, (caddr_t)&lbolt, TTIPRI | PCATCH, |
1114 | ttybg, 0)) | |
09b836aa | 1115 | return (error); |
58786a81 | 1116 | goto loop; |
4147b3f6 | 1117 | } |
09b836aa | 1118 | |
becb115c | 1119 | /* |
2c6a4e11 MT |
1120 | * If canonical, use the canonical queue, |
1121 | * else use the raw queue. | |
becb115c | 1122 | */ |
2c6a4e11 | 1123 | qp = lflag&ICANON ? &tp->t_canq : &tp->t_rawq; |
09b836aa | 1124 | |
becb115c | 1125 | /* |
09b836aa MK |
1126 | * If there is no input, sleep on rawq |
1127 | * awaiting hardware receipt and notification. | |
1128 | * If we have data, we don't need to check for carrier. | |
becb115c | 1129 | */ |
4f3a716e | 1130 | s = spltty(); |
becb115c | 1131 | if (qp->c_cc <= 0) { |
09b836aa MK |
1132 | int carrier; |
1133 | ||
1134 | carrier = (tp->t_state&TS_CARR_ON) || (tp->t_cflag&CLOCAL); | |
1135 | if (!carrier && tp->t_state&TS_ISOPEN) { | |
875a1e2c | 1136 | splx(s); |
09b836aa | 1137 | return (0); /* EOF */ |
4147b3f6 | 1138 | } |
c4ec2128 | 1139 | if (flag & IO_NDELAY) { |
66ad69d6 MT |
1140 | splx(s); |
1141 | return (EWOULDBLOCK); | |
1142 | } | |
eea83fd3 | 1143 | error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH, |
09b836aa | 1144 | carrier ? ttyin : ttopen, 0); |
875a1e2c | 1145 | splx(s); |
eea83fd3 | 1146 | if (error) |
09b836aa | 1147 | return (error); |
becb115c SL |
1148 | goto loop; |
1149 | } | |
875a1e2c | 1150 | splx(s); |
09b836aa | 1151 | |
becb115c | 1152 | /* |
2c6a4e11 | 1153 | * Input present, check for input mapping and processing. |
becb115c SL |
1154 | */ |
1155 | first = 1; | |
1156 | while ((c = getc(qp)) >= 0) { | |
becb115c | 1157 | /* |
2c6a4e11 | 1158 | * delayed suspend (^Y) |
becb115c | 1159 | */ |
2c6a4e11 | 1160 | if (CCEQ(cc[VDSUSP], c) && lflag&ISIG) { |
face72c1 | 1161 | pgsignal(tp->t_pgrp, SIGTSTP, 1); |
becb115c | 1162 | if (first) { |
eea83fd3 MT |
1163 | if (error = ttysleep(tp, (caddr_t)&lbolt, |
1164 | TTIPRI | PCATCH, ttybg, 0)) | |
09b836aa | 1165 | break; |
becb115c SL |
1166 | goto loop; |
1167 | } | |
1168 | break; | |
4147b3f6 | 1169 | } |
becb115c | 1170 | /* |
2c6a4e11 | 1171 | * Interpret EOF only in canonical mode. |
becb115c | 1172 | */ |
2c6a4e11 | 1173 | if (CCEQ(cc[VEOF], c) && lflag&ICANON) |
becb115c SL |
1174 | break; |
1175 | /* | |
1176 | * Give user character. | |
1177 | */ | |
2c6a4e11 | 1178 | error = ureadc(iflag&ISTRIP ? c & 0177 : c , uio); |
becb115c SL |
1179 | if (error) |
1180 | break; | |
9ec65acb | 1181 | if (uio->uio_resid == 0) |
becb115c SL |
1182 | break; |
1183 | /* | |
2c6a4e11 | 1184 | * In canonical mode check for a "break character" |
becb115c SL |
1185 | * marking the end of a "line of input". |
1186 | */ | |
2c6a4e11 | 1187 | if (lflag&ICANON && ttbreakc(c)) { |
becb115c | 1188 | break; |
2c6a4e11 | 1189 | } |
becb115c | 1190 | first = 0; |
4147b3f6 | 1191 | } |
becb115c SL |
1192 | /* |
1193 | * Look to unblock output now that (presumably) | |
1194 | * the input queue has gone down. | |
1195 | */ | |
b50ead57 | 1196 | s = spltty(); |
2c6a4e11 MT |
1197 | if (tp->t_state&TS_TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) { |
1198 | if (cc[VSTART] != POSIX_V_DISABLE | |
1199 | && putc(cc[VSTART], &tp->t_outq) == 0) { | |
4147b3f6 BJ |
1200 | tp->t_state &= ~TS_TBLOCK; |
1201 | ttstart(tp); | |
1202 | } | |
2c6a4e11 | 1203 | } |
b50ead57 | 1204 | splx(s); |
e39f9ea6 | 1205 | } |
840510a3 | 1206 | return (error); |
4147b3f6 BJ |
1207 | } |
1208 | ||
605d7712 MK |
1209 | /* |
1210 | * Check the output queue on tp for space for a kernel message | |
1211 | * (from uprintf/tprintf). Allow some space over the normal | |
1212 | * hiwater mark so we don't lose messages due to normal flow | |
1213 | * control, but don't let the tty run amok. | |
ca9b16e5 MK |
1214 | * Sleeps here are not interruptible, but we return prematurely |
1215 | * if new signals come in. | |
605d7712 MK |
1216 | */ |
1217 | ttycheckoutq(tp, wait) | |
1218 | register struct tty *tp; | |
1219 | int wait; | |
1220 | { | |
ca9b16e5 | 1221 | int hiwat, s, oldsig; |
6cec2da2 | 1222 | extern int wakeup(); |
605d7712 | 1223 | |
e39f9ea6 | 1224 | hiwat = tp->t_hiwat; |
605d7712 | 1225 | s = spltty(); |
b50ead57 | 1226 | oldsig = wait ? curproc->p_sig : 0; |
605d7712 | 1227 | if (tp->t_outq.c_cc > hiwat + 200) |
fb1db32c MK |
1228 | while (tp->t_outq.c_cc > hiwat) { |
1229 | ttstart(tp); | |
3789a403 | 1230 | if (wait == 0 || curproc->p_sig != oldsig) { |
fb1db32c MK |
1231 | splx(s); |
1232 | return (0); | |
1233 | } | |
ca9b16e5 | 1234 | timeout(wakeup, (caddr_t)&tp->t_outq, hz); |
fb1db32c | 1235 | tp->t_state |= TS_ASLEEP; |
ca9b16e5 | 1236 | sleep((caddr_t)&tp->t_outq, PZERO - 1); |
605d7712 | 1237 | } |
605d7712 MK |
1238 | splx(s); |
1239 | return (1); | |
1240 | } | |
1241 | ||
4147b3f6 | 1242 | /* |
d554174a | 1243 | * Process a write call on a tty device. |
4147b3f6 | 1244 | */ |
66ad69d6 | 1245 | ttwrite(tp, uio, flag) |
4b72e2f9 | 1246 | register struct tty *tp; |
becb115c | 1247 | register struct uio *uio; |
b50ead57 | 1248 | int flag; |
4147b3f6 | 1249 | { |
4147b3f6 | 1250 | register char *cp; |
09b836aa | 1251 | register int cc = 0, ce; |
3789a403 | 1252 | register struct proc *p = curproc; |
becb115c | 1253 | int i, hiwat, cnt, error, s; |
4147b3f6 | 1254 | char obuf[OBUFSIZ]; |
4147b3f6 | 1255 | |
e39f9ea6 | 1256 | hiwat = tp->t_hiwat; |
becb115c SL |
1257 | cnt = uio->uio_resid; |
1258 | error = 0; | |
4147b3f6 | 1259 | loop: |
66ad69d6 | 1260 | s = spltty(); |
09b836aa | 1261 | if ((tp->t_state&TS_CARR_ON) == 0 && (tp->t_cflag&CLOCAL) == 0) { |
66ad69d6 MT |
1262 | if (tp->t_state&TS_ISOPEN) { |
1263 | splx(s); | |
1264 | return (EIO); | |
c4ec2128 | 1265 | } else if (flag & IO_NDELAY) { |
66ad69d6 | 1266 | splx(s); |
09b836aa MK |
1267 | error = EWOULDBLOCK; |
1268 | goto out; | |
66ad69d6 MT |
1269 | } else { |
1270 | /* | |
1271 | * sleep awaiting carrier | |
1272 | */ | |
eea83fd3 MT |
1273 | error = ttysleep(tp, (caddr_t)&tp->t_rawq, |
1274 | TTIPRI | PCATCH,ttopen, 0); | |
66ad69d6 | 1275 | splx(s); |
eea83fd3 | 1276 | if (error) |
09b836aa | 1277 | goto out; |
66ad69d6 MT |
1278 | goto loop; |
1279 | } | |
1280 | } | |
1281 | splx(s); | |
becb115c SL |
1282 | /* |
1283 | * Hang the process if it's in the background. | |
1284 | */ | |
3789a403 MK |
1285 | if (isbackground(p, tp) && |
1286 | tp->t_lflag&TOSTOP && (p->p_flag&SPPWAIT) == 0 && | |
1287 | (p->p_sigignore & sigmask(SIGTTOU)) == 0 && | |
1288 | (p->p_sigmask & sigmask(SIGTTOU)) == 0 && | |
1289 | p->p_pgrp->pg_jobc) { | |
1290 | pgsignal(p->p_pgrp, SIGTTOU, 1); | |
eea83fd3 MT |
1291 | if (error = ttysleep(tp, (caddr_t)&lbolt, TTIPRI | PCATCH, |
1292 | ttybg, 0)) | |
09b836aa | 1293 | goto out; |
93d2ecff | 1294 | goto loop; |
4147b3f6 | 1295 | } |
becb115c SL |
1296 | /* |
1297 | * Process the user's data in at most OBUFSIZ | |
09b836aa MK |
1298 | * chunks. Perform any output translation. |
1299 | * Keep track of high water mark, sleep on overflow | |
1300 | * awaiting device aid in acquiring new space. | |
becb115c | 1301 | */ |
09b836aa MK |
1302 | while (uio->uio_resid > 0 || cc > 0) { |
1303 | if (tp->t_lflag&FLUSHO) { | |
1304 | uio->uio_resid = 0; | |
1305 | return (0); | |
b482b2c8 | 1306 | } |
09b836aa MK |
1307 | if (tp->t_outq.c_cc > hiwat) |
1308 | goto ovhiwat; | |
becb115c | 1309 | /* |
09b836aa MK |
1310 | * Grab a hunk of data from the user, |
1311 | * unless we have some leftover from last time. | |
becb115c | 1312 | */ |
913ea2d1 | 1313 | if (cc == 0) { |
09b836aa MK |
1314 | cc = min(uio->uio_resid, OBUFSIZ); |
1315 | cp = obuf; | |
1316 | error = uiomove(cp, cc, uio); | |
1317 | if (error) { | |
1318 | cc = 0; | |
1319 | break; | |
1320 | } | |
913ea2d1 | 1321 | } |
2c6a4e11 | 1322 | #ifdef notdef |
becb115c SL |
1323 | /* |
1324 | * If nothing fancy need be done, grab those characters we | |
1325 | * can handle without any of ttyoutput's processing and | |
1326 | * just transfer them to the output q. For those chars | |
1327 | * which require special processing (as indicated by the | |
1328 | * bits in partab), call ttyoutput. After processing | |
1329 | * a hunk of data, look for FLUSHO so ^O's will take effect | |
1330 | * immediately. | |
1331 | */ | |
1332 | while (cc > 0) { | |
2c6a4e11 | 1333 | if (!(tp->t_oflag&OPOST)) |
4147b3f6 BJ |
1334 | ce = cc; |
1335 | else { | |
3f36033f | 1336 | ce = cc - scanc((unsigned)cc, (u_char *)cp, |
d554174a | 1337 | (u_char *)partab, CCLASSMASK); |
becb115c SL |
1338 | /* |
1339 | * If ce is zero, then we're processing | |
1340 | * a special character through ttyoutput. | |
1341 | */ | |
1342 | if (ce == 0) { | |
4147b3f6 BJ |
1343 | tp->t_rocount = 0; |
1344 | if (ttyoutput(*cp, tp) >= 0) { | |
93d2ecff JB |
1345 | /* no c-lists, wait a bit */ |
1346 | ttstart(tp); | |
eea83fd3 MT |
1347 | if (error = ttysleep(tp, |
1348 | (caddr_t)&lbolt, | |
1349 | TTOPRI | PCATCH, ttybuf, 0)) | |
09b836aa | 1350 | break; |
93d2ecff | 1351 | goto loop; |
4147b3f6 | 1352 | } |
becb115c | 1353 | cp++, cc--; |
2c6a4e11 | 1354 | if (tp->t_lflag&FLUSHO || |
becb115c | 1355 | tp->t_outq.c_cc > hiwat) |
4147b3f6 | 1356 | goto ovhiwat; |
becb115c | 1357 | continue; |
4147b3f6 BJ |
1358 | } |
1359 | } | |
becb115c SL |
1360 | /* |
1361 | * A bunch of normal characters have been found, | |
1362 | * transfer them en masse to the output queue and | |
1363 | * continue processing at the top of the loop. | |
1364 | * If there are any further characters in this | |
1365 | * <= OBUFSIZ chunk, the first should be a character | |
1366 | * requiring special handling by ttyoutput. | |
1367 | */ | |
4147b3f6 | 1368 | tp->t_rocount = 0; |
becb115c SL |
1369 | i = b_to_q(cp, ce, &tp->t_outq); |
1370 | ce -= i; | |
1371 | tp->t_col += ce; | |
1372 | cp += ce, cc -= ce, tk_nout += ce; | |
e39f9ea6 | 1373 | tp->t_outcc += ce; |
becb115c SL |
1374 | if (i > 0) { |
1375 | /* out of c-lists, wait a bit */ | |
4147b3f6 | 1376 | ttstart(tp); |
eea83fd3 MT |
1377 | if (error = ttysleep(tp, (caddr_t)&lbolt, |
1378 | TTOPRI | PCATCH, ttybuf, 0)) | |
09b836aa | 1379 | break; |
93d2ecff | 1380 | goto loop; |
4147b3f6 | 1381 | } |
2c6a4e11 | 1382 | if (tp->t_lflag&FLUSHO || tp->t_outq.c_cc > hiwat) |
09b836aa | 1383 | break; |
4147b3f6 | 1384 | } |
2c6a4e11 | 1385 | ttstart(tp); |
e39f9ea6 | 1386 | ttstart(tp); |
4147b3f6 | 1387 | } |
09b836aa MK |
1388 | out: |
1389 | /* | |
1390 | * If cc is nonzero, we leave the uio structure inconsistent, | |
1391 | * as the offset and iov pointers have moved forward, | |
1392 | * but it doesn't matter (the call will either return short | |
1393 | * or restart with a new uio). | |
1394 | */ | |
1395 | uio->uio_resid += cc; | |
840510a3 | 1396 | return (error); |
09b836aa | 1397 | |
4147b3f6 | 1398 | ovhiwat: |
b482b2c8 MK |
1399 | ttstart(tp); |
1400 | s = spltty(); | |
becb115c | 1401 | /* |
2c6a4e11 | 1402 | * This can only occur if FLUSHO is set in t_lflag, |
b482b2c8 | 1403 | * or if ttstart/oproc is synchronous (or very fast). |
becb115c | 1404 | */ |
4147b3f6 | 1405 | if (tp->t_outq.c_cc <= hiwat) { |
becb115c | 1406 | splx(s); |
4147b3f6 BJ |
1407 | goto loop; |
1408 | } | |
c4ec2128 | 1409 | if (flag & IO_NDELAY) { |
4f3a716e | 1410 | splx(s); |
09b836aa | 1411 | uio->uio_resid += cc; |
913ea2d1 | 1412 | if (uio->uio_resid == cnt) |
840510a3 BJ |
1413 | return (EWOULDBLOCK); |
1414 | return (0); | |
4147b3f6 BJ |
1415 | } |
1416 | tp->t_state |= TS_ASLEEP; | |
eea83fd3 | 1417 | error = ttysleep(tp, (caddr_t)&tp->t_outq, TTOPRI | PCATCH, ttyout, 0); |
becb115c | 1418 | splx(s); |
eea83fd3 | 1419 | if (error) |
09b836aa | 1420 | goto out; |
4147b3f6 BJ |
1421 | goto loop; |
1422 | } | |
1423 | ||
1424 | /* | |
1425 | * Rubout one character from the rawq of tp | |
1426 | * as cleanly as possible. | |
1427 | */ | |
1428 | ttyrub(c, tp) | |
4b72e2f9 SL |
1429 | register c; |
1430 | register struct tty *tp; | |
4147b3f6 BJ |
1431 | { |
1432 | register char *cp; | |
1433 | register int savecol; | |
1434 | int s; | |
1435 | char *nextc(); | |
1436 | ||
2c6a4e11 | 1437 | if ((tp->t_lflag&ECHO) == 0) |
4147b3f6 | 1438 | return; |
2c6a4e11 | 1439 | if (tp->t_lflag&ECHOE) { |
4147b3f6 BJ |
1440 | if (tp->t_rocount == 0) { |
1441 | /* | |
1442 | * Screwed by ttwrite; retype | |
1443 | */ | |
1444 | ttyretype(tp); | |
1445 | return; | |
1446 | } | |
2c6a4e11 | 1447 | /* if tab or newline was escaped - XXX - not 8bit */ |
e39f9ea6 | 1448 | if (c == ('\t'|TTY_QUOTE) || c == ('\n'|TTY_QUOTE)) |
4147b3f6 | 1449 | ttyrubo(tp, 2); |
d554174a | 1450 | else switch (CCLASS(c &= TTY_CHARMASK)) { |
4147b3f6 BJ |
1451 | |
1452 | case ORDINARY: | |
2c6a4e11 | 1453 | #ifdef notdef |
e39f9ea6 | 1454 | ttyrubo(tp, 1); |
4147b3f6 BJ |
1455 | break; |
1456 | ||
1457 | case VTAB: | |
1458 | case BACKSPACE: | |
1459 | case CONTROL: | |
1460 | case RETURN: | |
3789a403 | 1461 | case NEWLINE: |
2c6a4e11 | 1462 | if (tp->t_lflag&ECHOCTL) |
4147b3f6 BJ |
1463 | ttyrubo(tp, 2); |
1464 | break; | |
1465 | ||
e39f9ea6 MT |
1466 | case TAB: { |
1467 | int c; | |
1468 | ||
4147b3f6 BJ |
1469 | if (tp->t_rocount < tp->t_rawq.c_cc) { |
1470 | ttyretype(tp); | |
1471 | return; | |
1472 | } | |
4f3a716e | 1473 | s = spltty(); |
4147b3f6 | 1474 | savecol = tp->t_col; |
becb115c | 1475 | tp->t_state |= TS_CNTTB; |
2c6a4e11 | 1476 | tp->t_lflag |= FLUSHO; |
4147b3f6 | 1477 | tp->t_col = tp->t_rocol; |
becb115c | 1478 | cp = tp->t_rawq.c_cf; |
2c6a4e11 | 1479 | tp->t_lflag &= ~FLUSHO; |
becb115c | 1480 | tp->t_state &= ~TS_CNTTB; |
4147b3f6 BJ |
1481 | splx(s); |
1482 | /* | |
1483 | * savecol will now be length of the tab | |
1484 | */ | |
1485 | savecol -= tp->t_col; | |
1486 | tp->t_col += savecol; | |
1487 | if (savecol > 8) | |
1488 | savecol = 8; /* overflow screw */ | |
1489 | while (--savecol >= 0) | |
1490 | (void) ttyoutput('\b', tp); | |
1491 | break; | |
e39f9ea6 | 1492 | } |
4147b3f6 BJ |
1493 | |
1494 | default: | |
66ad69d6 | 1495 | /* XXX */ |
e39f9ea6 | 1496 | printf("ttyrub: would panic c = %d, val = %d\n", |
d554174a | 1497 | c, CCLASS(c)); |
e39f9ea6 | 1498 | /*panic("ttyrub");*/ |
4147b3f6 | 1499 | } |
2c6a4e11 | 1500 | } else if (tp->t_lflag&ECHOPRT) { |
becb115c | 1501 | if ((tp->t_state&TS_ERASE) == 0) { |
4147b3f6 | 1502 | (void) ttyoutput('\\', tp); |
becb115c | 1503 | tp->t_state |= TS_ERASE; |
4147b3f6 BJ |
1504 | } |
1505 | ttyecho(c, tp); | |
1506 | } else | |
2c6a4e11 | 1507 | ttyecho(tp->t_cc[VERASE], tp); |
4147b3f6 BJ |
1508 | tp->t_rocount--; |
1509 | } | |
1510 | ||
1511 | /* | |
1512 | * Crt back over cnt chars perhaps | |
1513 | * erasing them. | |
1514 | */ | |
1515 | ttyrubo(tp, cnt) | |
4b72e2f9 SL |
1516 | register struct tty *tp; |
1517 | int cnt; | |
4147b3f6 | 1518 | { |
2c6a4e11 | 1519 | register char *rubostring = tp->t_lflag&ECHOE ? "\b \b" : "\b"; |
4147b3f6 BJ |
1520 | |
1521 | while (--cnt >= 0) | |
09b836aa | 1522 | ttyoutstr("\b \b", tp); |
4147b3f6 BJ |
1523 | } |
1524 | ||
1525 | /* | |
1526 | * Reprint the rawq line. | |
1527 | * We assume c_cc has already been checked. | |
1528 | */ | |
1529 | ttyretype(tp) | |
4b72e2f9 | 1530 | register struct tty *tp; |
4147b3f6 BJ |
1531 | { |
1532 | register char *cp; | |
1533 | char *nextc(); | |
e39f9ea6 | 1534 | int s, c; |
4147b3f6 | 1535 | |
2c6a4e11 MT |
1536 | if (tp->t_cc[VREPRINT] != POSIX_V_DISABLE) |
1537 | ttyecho(tp->t_cc[VREPRINT], tp); | |
4147b3f6 | 1538 | (void) ttyoutput('\n', tp); |
4f3a716e | 1539 | s = spltty(); |
e39f9ea6 MT |
1540 | /*** XXX *** FIX *** NEXTC IS BROKEN - DOESN'T CHECK QUOTE |
1541 | BIT OF FIRST CHAR ****/ | |
1542 | for (cp = tp->t_canq.c_cf, c=(cp?*cp:0); cp; cp = nextc(&tp->t_canq, cp, &c)) { | |
1543 | ttyecho(c, tp); | |
1544 | } | |
1545 | for (cp = tp->t_rawq.c_cf, c=(cp?*cp:0); cp; cp = nextc(&tp->t_rawq, cp, &c)) { | |
1546 | ttyecho(c, tp); | |
1547 | } | |
becb115c | 1548 | tp->t_state &= ~TS_ERASE; |
4147b3f6 BJ |
1549 | splx(s); |
1550 | tp->t_rocount = tp->t_rawq.c_cc; | |
1551 | tp->t_rocol = 0; | |
1552 | } | |
1553 | ||
1554 | /* | |
2c6a4e11 | 1555 | * Echo a typed character to the terminal. |
4147b3f6 BJ |
1556 | */ |
1557 | ttyecho(c, tp) | |
4b72e2f9 SL |
1558 | register c; |
1559 | register struct tty *tp; | |
4147b3f6 | 1560 | { |
4147b3f6 | 1561 | c &= 0377; |
2c6a4e11 MT |
1562 | if ((tp->t_state&TS_CNTTB) == 0) |
1563 | tp->t_lflag &= ~FLUSHO; | |
1564 | if ((tp->t_lflag&ECHO) == 0 && !(tp->t_lflag&ECHONL && c == '\n')) | |
4147b3f6 | 1565 | return; |
2c6a4e11 | 1566 | if (tp->t_lflag&ECHOCTL) { |
09b836aa MK |
1567 | if ((c&TTY_CHARMASK) <= 037 && c != '\t' && c != '\n' || |
1568 | c == 0177) { | |
4147b3f6 | 1569 | (void) ttyoutput('^', tp); |
e39f9ea6 | 1570 | c &= TTY_CHARMASK; |
4147b3f6 BJ |
1571 | if (c == 0177) |
1572 | c = '?'; | |
2c6a4e11 | 1573 | #ifdef notdef |
2c6a4e11 | 1574 | #endif |
4147b3f6 BJ |
1575 | else |
1576 | c += 'A' - 1; | |
1577 | } | |
1578 | } | |
e39f9ea6 | 1579 | (void) ttyoutput(c, tp); |
4147b3f6 BJ |
1580 | * send string cp to tp |
1581 | */ | |
09b836aa | 1582 | ttyoutstr(cp, tp) |
4b72e2f9 SL |
1583 | register char *cp; |
1584 | register struct tty *tp; | |
4147b3f6 BJ |
1585 | { |
1586 | register char c; | |
1587 | ||
1588 | while (c = *cp++) | |
1589 | (void) ttyoutput(c, tp); | |
1590 | } | |
1591 | ||
d554174a MK |
1592 | /* |
1593 | * Wake up any readers on a tty. | |
1594 | */ | |
4147b3f6 | 1595 | ttwakeup(tp) |
3789a403 | 1596 | register struct tty *tp; |
4147b3f6 BJ |
1597 | { |
1598 | ||
77f9c500 | 1599 | selwakeup(&tp->t_rsel); |
88a7a62a | 1600 | if (tp->t_state & TS_ASYNC) |
face72c1 | 1601 | pgsignal(tp->t_pgrp, SIGIO, 1); |
4147b3f6 BJ |
1602 | wakeup((caddr_t)&tp->t_rawq); |
1603 | } | |
e39f9ea6 | 1604 | |
6cec2da2 MK |
1605 | /* |
1606 | * Look up a code for a specified speed in a conversion table; | |
1607 | * used by drivers to map software speed values to hardware parameters. | |
1608 | */ | |
1609 | ttspeedtab(speed, table) | |
b50ead57 | 1610 | int speed; |
6cec2da2 MK |
1611 | register struct speedtab *table; |
1612 | { | |
1613 | ||
1614 | for ( ; table->sp_speed != -1; table++) | |
1615 | if (table->sp_speed == speed) | |
1616 | return (table->sp_code); | |
1617 | return (-1); | |
1618 | } | |
1619 | ||
e39f9ea6 MT |
1620 | /* |
1621 | * set tty hi and low water marks | |
1622 | * | |
1623 | * Try to arrange the dynamics so there's about one second | |
1624 | * from hi to low water. | |
1625 | * | |
1626 | */ | |
1627 | ttsetwater(tp) | |
1628 | struct tty *tp; | |
1629 | { | |
1630 | register cps = tp->t_ospeed / 10; | |
1631 | register x; | |
1632 | ||
1633 | #define clamp(x, h, l) ((x)>h ? h : ((x)<l) ? l : (x)) | |
1634 | tp->t_lowat = x = clamp(cps/2, TTMAXLOWAT, TTMINLOWAT); | |
1635 | x += cps; | |
1636 | x = clamp(x, TTMAXHIWAT, TTMINHIWAT); | |
1637 | tp->t_hiwat = roundup(x, CBSIZE); | |
1638 | #undef clamp | |
1639 | } | |
1640 | ||
52004850 | 1641 | /* |
52004850 MT |
1642 | * Report on state of foreground process group. |
1643 | */ | |
1644 | ttyinfo(tp) | |
91c77c3e | 1645 | register struct tty *tp; |
52004850 | 1646 | { |
91c77c3e | 1647 | register struct proc *p, *pick; |
9872d890 | 1648 | struct timeval utime, stime; |
91c77c3e | 1649 | int tmp; |
52004850 MT |
1650 | |
1651 | if (ttycheckoutq(tp,0) == 0) | |
1652 | return; | |
91c77c3e KB |
1653 | |
1654 | /* Print load average. */ | |
ea853f5f | 1655 | tmp = (averunnable.ldavg[0] * 100 + FSCALE / 2) >> FSHIFT; |
91c77c3e KB |
1656 | ttyprintf(tp, "load: %d.%02d ", tmp / 100, tmp % 100); |
1657 | ||
232c0273 | 1658 | if (tp->t_session == NULL) |
91c77c3e | 1659 | ttyprintf(tp, "not a controlling terminal\n"); |
9872d890 | 1660 | else if (tp->t_pgrp == NULL) |
91c77c3e | 1661 | ttyprintf(tp, "no foreground process group\n"); |
9872d890 | 1662 | else if ((p = tp->t_pgrp->pg_mem) == NULL) |
91c77c3e | 1663 | ttyprintf(tp, "empty foreground process group\n"); |
52004850 | 1664 | else { |
91c77c3e KB |
1665 | /* Pick interesting process. */ |
1666 | for (pick = NULL; p != NULL; p = p->p_pgrpnxt) | |
9872d890 MT |
1667 | if (proc_compare(pick, p)) |
1668 | pick = p; | |
91c77c3e KB |
1669 | |
1670 | ttyprintf(tp, " cmd: %s %d [%s] ", pick->p_comm, pick->p_pid, | |
1671 | pick->p_stat == SRUN ? "running" : | |
1672 | pick->p_wmesg ? pick->p_wmesg : "iowait"); | |
1673 | ||
1674 | /* | |
1675 | * Lock out clock if process is running; get user/system | |
1676 | * cpu time. | |
9872d890 | 1677 | */ |
3789a403 | 1678 | if (curproc == pick) |
91c77c3e | 1679 | tmp = splclock(); |
9872d890 MT |
1680 | utime = pick->p_utime; |
1681 | stime = pick->p_stime; | |
3789a403 | 1682 | if (curproc == pick) |
91c77c3e | 1683 | splx(tmp); |
9872d890 | 1684 | |
91c77c3e KB |
1685 | /* Print user time. */ |
1686 | ttyprintf(tp, "%d.%02du ", | |
1687 | utime.tv_sec, (utime.tv_usec + 5000) / 10000); | |
9872d890 | 1688 | |
91c77c3e KB |
1689 | /* Print system time. */ |
1690 | ttyprintf(tp, "%d.%02ds ", | |
1691 | stime.tv_sec, (stime.tv_usec + 5000) / 10000); | |
1692 | ||
1693 | #define pgtok(a) (((a) * NBPG) / 1024) | |
1694 | /* Print percentage cpu, resident set size. */ | |
1695 | tmp = pick->p_pctcpu * 10000 + FSCALE / 2 >> FSHIFT; | |
1696 | ttyprintf(tp, "%d%% %dk\n", | |
b50ead57 CT |
1697 | tmp / 100, |
1698 | pick->p_stat == SIDL || pick->p_stat == SZOMB ? 0 : | |
1699 | pgtok(pick->p_vmspace->vm_rssize)); | |
52004850 | 1700 | } |
91c77c3e | 1701 | tp->t_rocount = 0; /* so pending input will be retyped if BS */ |
52004850 MT |
1702 | } |
1703 | ||
9872d890 MT |
1704 | /* |
1705 | * Returns 1 if p2 is "better" than p1 | |
1706 | * | |
1707 | * The algorithm for picking the "interesting" process is thus: | |
1708 | * | |
1709 | * 1) (Only foreground processes are eligable - implied) | |
1710 | * 2) Runnable processes are favored over anything | |
1711 | * else. The runner with the highest cpu | |
1712 | * utilization is picked (p_cpu). Ties are | |
1713 | * broken by picking the highest pid. | |
1714 | * 3 Next, the sleeper with the shortest sleep | |
1715 | * time is favored. With ties, we pick out | |
1716 | * just "short-term" sleepers (SSINTR == 0). | |
1717 | * Further ties are broken by picking the highest | |
1718 | * pid. | |
1719 | * | |
1720 | */ | |
1721 | #define isrun(p) (((p)->p_stat == SRUN) || ((p)->p_stat == SIDL)) | |
9ca8548a KM |
1722 | #define TESTAB(a, b) ((a)<<1 | (b)) |
1723 | #define ONLYA 2 | |
1724 | #define ONLYB 1 | |
1725 | #define BOTH 3 | |
1726 | ||
91c77c3e | 1727 | static int |
9872d890 MT |
1728 | proc_compare(p1, p2) |
1729 | register struct proc *p1, *p2; | |
1730 | { | |
1731 | ||
1732 | if (p1 == NULL) | |
1733 | return (1); | |
1734 | /* | |
1735 | * see if at least one of them is runnable | |
1736 | */ | |
9ca8548a KM |
1737 | switch (TESTAB(isrun(p1), isrun(p2))) { |
1738 | case ONLYA: | |
9872d890 | 1739 | return (0); |
9ca8548a KM |
1740 | case ONLYB: |
1741 | return (1); | |
1742 | case BOTH: | |
9872d890 MT |
1743 | /* |
1744 | * tie - favor one with highest recent cpu utilization | |
1745 | */ | |
1746 | if (p2->p_cpu > p1->p_cpu) | |
1747 | return (1); | |
1748 | if (p1->p_cpu > p2->p_cpu) | |
1749 | return (0); | |
1750 | return (p2->p_pid > p1->p_pid); /* tie - return highest pid */ | |
1751 | } | |
9ca8548a KM |
1752 | /* |
1753 | * weed out zombies | |
1754 | */ | |
1755 | switch (TESTAB(p1->p_stat == SZOMB, p2->p_stat == SZOMB)) { | |
1756 | case ONLYA: | |
1757 | return (1); | |
1758 | case ONLYB: | |
1759 | return (0); | |
1760 | case BOTH: | |
1761 | return (p2->p_pid > p1->p_pid); /* tie - return highest pid */ | |
1762 | } | |
9872d890 MT |
1763 | /* |
1764 | * pick the one with the smallest sleep time | |
1765 | */ | |
1766 | if (p2->p_slptime > p1->p_slptime) | |
1767 | return (0); | |
1768 | if (p1->p_slptime > p2->p_slptime) | |
1769 | return (1); | |
1770 | /* | |
1771 | * favor one sleeping in a non-interruptible sleep | |
1772 | */ | |
1773 | if (p1->p_flag&SSINTR && (p2->p_flag&SSINTR) == 0) | |
1774 | return (1); | |
1775 | if (p2->p_flag&SSINTR && (p1->p_flag&SSINTR) == 0) | |
1776 | return (0); | |
3789a403 | 1777 | return (p2->p_pid > p1->p_pid); /* tie - return highest pid */ |
9872d890 | 1778 | } |
9ca8548a | 1779 | |
232c0273 MT |
1780 | /* |
1781 | * Output char to tty; console putchar style. | |
1782 | */ | |
1783 | tputchar(c, tp) | |
1784 | int c; | |
1785 | struct tty *tp; | |
1786 | { | |
1787 | register s = spltty(); | |
1788 | ||
3789a403 | 1789 | if ((tp->t_state & (TS_CARR_ON|TS_ISOPEN)) == (TS_CARR_ON|TS_ISOPEN)) { |
232c0273 MT |
1790 | if (c == '\n') |
1791 | (void) ttyoutput('\r', tp); | |
1792 | (void) ttyoutput(c, tp); | |
1793 | ttstart(tp); | |
1794 | splx(s); | |
1795 | return (0); | |
1796 | } | |
1797 | splx(s); | |
1798 | return (-1); | |
52004850 | 1799 | } |
eea83fd3 | 1800 | |
e6745ca3 | 1801 | /* |
d554174a MK |
1802 | * Sleep on chan, returning ERESTART if tty changed |
1803 | * while we napped and returning any errors (e.g. EINTR/ETIMEDOUT) | |
1804 | * reported by tsleep. If the tty is revoked, restarting a pending | |
1805 | * call will redo validation done at the start of the call. | |
e6745ca3 | 1806 | */ |
eea83fd3 MT |
1807 | ttysleep(tp, chan, pri, wmesg, timo) |
1808 | struct tty *tp; | |
1809 | caddr_t chan; | |
1810 | int pri; | |
1811 | char *wmesg; | |
1812 | int timo; | |
1813 | { | |
1814 | int error; | |
1815 | short gen = tp->t_gen; | |
1816 | ||
1817 | if (error = tsleep(chan, pri, wmesg, timo)) | |
1818 | return (error); | |
1819 | if (tp->t_gen != gen) | |
1820 | return (ERESTART); | |
1821 | return (0); | |
1822 | } |