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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 | * |
adacc19e | 8 | * @(#)tty.c 7.43 (Berkeley) %G% |
da7c5cc6 | 9 | */ |
961945a8 | 10 | |
94368568 JB |
11 | #include "param.h" |
12 | #include "systm.h" | |
94368568 | 13 | #include "ioctl.h" |
2c6a4e11 | 14 | #define TTYDEFCHARS |
52004850 | 15 | #include "tty.h" |
2c6a4e11 | 16 | #undef TTYDEFCHARS |
e39f9ea6 MT |
17 | #define TTYDEFCHARS |
18 | #include "ttydefaults.h" | |
19 | #undef TTYDEFCHARS | |
20 | #include "termios.h" | |
94368568 | 21 | #include "proc.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 | |
09b836aa MK |
33 | /* symbolic sleep message strings */ |
34 | char ttyin[] = "ttyin"; | |
35 | char ttyout[] = "ttyout"; | |
bbd77f60 MT |
36 | char ttopen[] = "ttyopn"; |
37 | char ttclos[] = "ttycls"; | |
09b836aa MK |
38 | char ttybg[] = "ttybg"; |
39 | char ttybuf[] = "ttybuf"; | |
40 | ||
8bba2b8f RE |
41 | /* |
42 | * Table giving parity for characters and indicating | |
e39f9ea6 MT |
43 | * character classes to tty driver. The 8th bit |
44 | * indicates parity, the 7th bit indicates the character | |
45 | * is an alphameric or underscore (for ALTWERASE), and the | |
46 | * low 6 bits indicate delay type. If the low 6 bits are 0 | |
d554174a MK |
47 | * then the character needs no special processing on output; |
48 | * classes other than 0 might be translated or (not currently) | |
49 | * require delays. | |
8bba2b8f | 50 | */ |
d554174a MK |
51 | #define PARITY(c) (partab[c] & 0x80) |
52 | #define ISALPHA(c) (partab[(c)&TTY_CHARMASK] & 0x40) | |
53 | #define CCLASSMASK 0x3f | |
54 | #define CCLASS(c) (partab[c] & CCLASSMASK) | |
55 | ||
56 | #define E 0x00 /* even parity */ | |
57 | #define O 0x80 /* odd parity */ | |
58 | #define ALPHA 0x40 /* alpha or underscore */ | |
59 | ||
60 | #define NO ORDINARY | |
61 | #define NA ORDINARY|ALPHA | |
62 | #define CC CONTROL | |
63 | #define BS BACKSPACE | |
64 | #define NL NEWLINE | |
65 | #define TB TAB | |
66 | #define VT VTAB | |
67 | #define CR RETURN | |
8bba2b8f RE |
68 | |
69 | char partab[] = { | |
d554174a MK |
70 | E|CC, O|CC, O|CC, E|CC, O|CC, E|CC, E|CC, O|CC, /* nul - bel */ |
71 | O|BS, E|TB, E|NL, O|CC, E|VT, O|CR, O|CC, E|CC, /* bs - si */ | |
72 | O|CC, E|CC, E|CC, O|CC, E|CC, O|CC, O|CC, E|CC, /* dle - etb */ | |
73 | E|CC, O|CC, O|CC, E|CC, O|CC, E|CC, E|CC, O|CC, /* can - us */ | |
74 | O|NO, E|NO, E|NO, O|NO, E|NO, O|NO, O|NO, E|NO, /* sp - ' */ | |
75 | E|NO, O|NO, O|NO, E|NO, O|NO, E|NO, E|NO, O|NO, /* ( - / */ | |
76 | E|NA, O|NA, O|NA, E|NA, O|NA, E|NA, E|NA, O|NA, /* 0 - 7 */ | |
77 | O|NA, E|NA, E|NO, O|NO, E|NO, O|NO, O|NO, E|NO, /* 8 - ? */ | |
78 | O|NO, E|NA, E|NA, O|NA, E|NA, O|NA, O|NA, E|NA, /* @ - G */ | |
79 | E|NA, O|NA, O|NA, E|NA, O|NA, E|NA, E|NA, O|NA, /* H - O */ | |
80 | E|NA, O|NA, O|NA, E|NA, O|NA, E|NA, E|NA, O|NA, /* P - W */ | |
81 | O|NA, E|NA, E|NA, O|NO, E|NO, O|NO, O|NO, O|NA, /* X - _ */ | |
82 | E|NO, O|NA, O|NA, E|NA, O|NA, E|NA, E|NA, O|NA, /* ` - g */ | |
83 | O|NA, E|NA, E|NA, O|NA, E|NA, O|NA, O|NA, E|NA, /* h - o */ | |
84 | O|NA, E|NA, E|NA, O|NA, E|NA, O|NA, O|NA, E|NA, /* p - w */ | |
85 | E|NA, O|NA, O|NA, E|NO, O|NO, E|NO, E|NO, O|CC, /* x - del */ | |
8bba2b8f | 86 | /* |
d554174a MK |
87 | * "meta" chars; should be settable per charset. |
88 | * For now, treat all as normal characters. | |
8bba2b8f | 89 | */ |
d554174a MK |
90 | NA, NA, NA, NA, NA, NA, NA, NA, |
91 | NA, NA, NA, NA, NA, NA, NA, NA, | |
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, | |
89dc6dfb | 106 | }; |
d554174a MK |
107 | #undef NO |
108 | #undef NA | |
109 | #undef CC | |
110 | #undef BS | |
111 | #undef NL | |
112 | #undef TB | |
113 | #undef VT | |
114 | #undef CR | |
89dc6dfb | 115 | |
adf4bc89 | 116 | extern struct tty *constty; /* temporary virtual console */ |
2c6a4e11 | 117 | |
e39f9ea6 MT |
118 | /* |
119 | * Is 'c' a line delimiter ("break" character)? | |
120 | */ | |
09b836aa MK |
121 | #define ttbreakc(c) ((c) == '\n' || ((c) == cc[VEOF] || \ |
122 | (c) == cc[VEOL] || (c) == cc[VEOL2]) && (c) != _POSIX_VDISABLE) | |
e39f9ea6 | 123 | |
2c6a4e11 MT |
124 | /* |
125 | * Debugging aids | |
126 | */ | |
127 | #define dprintf if (tp->t_trace & TTRACE_IO)printf | |
128 | ||
129 | /* | |
130 | * Is 'c' a line delimiter ("break" character)? | |
131 | */ | |
132 | #define ttbreakc(c) (c == '\n' || CCEQ(cc[VEOF], c) || \ | |
133 | CCEQ(cc[VEOL], c) || CCEQ(cc[VEOL2], c)) | |
adf4bc89 | 134 | |
89dc6dfb | 135 | ttychars(tp) |
becb115c | 136 | struct tty *tp; |
89dc6dfb | 137 | { |
3789a403 | 138 | |
2c6a4e11 | 139 | bcopy(ttydefchars, tp->t_cc, sizeof(ttydefchars)); |
89dc6dfb BJ |
140 | } |
141 | ||
142 | /* | |
2c6a4e11 | 143 | * |
d554174a | 144 | * Flush tty after output has drained. |
89dc6dfb | 145 | */ |
88a7a62a | 146 | ttywflush(tp) |
66ad69d6 | 147 | struct tty *tp; |
89dc6dfb | 148 | { |
09b836aa | 149 | int error; |
89dc6dfb | 150 | |
09b836aa MK |
151 | if ((error = ttywait(tp)) == 0) |
152 | ttyflush(tp, FREAD); | |
153 | return (error); | |
88a7a62a SL |
154 | } |
155 | ||
e39f9ea6 MT |
156 | /* |
157 | * Wait for output to drain. | |
158 | */ | |
2c6a4e11 MT |
159 | /* |
160 | * Wait for output to drain. | |
161 | */ | |
88a7a62a SL |
162 | ttywait(tp) |
163 | register struct tty *tp; | |
164 | { | |
09b836aa | 165 | int error = 0, s = spltty(); |
88a7a62a | 166 | |
5de287d9 | 167 | while ((tp->t_outq.c_cc || tp->t_state&TS_BUSY) && |
66ad69d6 MT |
168 | (tp->t_state&TS_CARR_ON || tp->t_cflag&CLOCAL) && |
169 | tp->t_oproc) { | |
50e2732b | 170 | (*tp->t_oproc)(tp); |
941944c9 | 171 | tp->t_state |= TS_ASLEEP; |
eea83fd3 MT |
172 | if (error = ttysleep(tp, (caddr_t)&tp->t_outq, |
173 | TTOPRI | PCATCH, ttyout, 0)) | |
09b836aa | 174 | break; |
50e2732b | 175 | } |
875a1e2c | 176 | splx(s); |
09b836aa | 177 | return (error); |
89dc6dfb BJ |
178 | } |
179 | ||
d554174a MK |
180 | #define flushq(qq) { \ |
181 | register struct clist *q = qq; \ | |
182 | if (q->c_cc) \ | |
183 | ndflush(q, q->c_cc); \ | |
184 | } | |
185 | ||
89dc6dfb | 186 | /* |
d554174a MK |
187 | * Flush TTY read and/or write queues, |
188 | * notifying anyone waiting. | |
89dc6dfb | 189 | */ |
88a7a62a | 190 | ttyflush(tp, rw) |
4b72e2f9 | 191 | register struct tty *tp; |
89dc6dfb | 192 | { |
50e2732b BJ |
193 | register s; |
194 | ||
4f3a716e | 195 | s = spltty(); |
50e2732b | 196 | if (rw & FREAD) { |
d554174a MK |
197 | flushq(&tp->t_canq); |
198 | flushq(&tp->t_rawq); | |
199 | tp->t_rocount = 0; | |
200 | tp->t_rocol = 0; | |
201 | tp->t_state &= ~TS_LOCAL; | |
66ad69d6 | 202 | ttwakeup(tp); |
50e2732b BJ |
203 | } |
204 | if (rw & FWRITE) { | |
941944c9 | 205 | tp->t_state &= ~TS_TTSTOP; |
39697bd8 | 206 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, rw); |
d554174a MK |
207 | flushq(&tp->t_outq); |
208 | wakeup((caddr_t)&tp->t_outq); | |
209 | if (tp->t_wsel) { | |
210 | selwakeup(tp->t_wsel, tp->t_state & TS_WCOLL); | |
211 | tp->t_wsel = 0; | |
212 | tp->t_state &= ~TS_WCOLL; | |
213 | } | |
50e2732b BJ |
214 | } |
215 | splx(s); | |
89dc6dfb BJ |
216 | } |
217 | ||
50e2732b BJ |
218 | /* |
219 | * Send stop character on input overflow. | |
220 | */ | |
221 | ttyblock(tp) | |
4b72e2f9 | 222 | register struct tty *tp; |
89dc6dfb | 223 | { |
50e2732b | 224 | register x; |
becb115c | 225 | |
50e2732b BJ |
226 | x = tp->t_rawq.c_cc + tp->t_canq.c_cc; |
227 | if (tp->t_rawq.c_cc > TTYHOG) { | |
88a7a62a | 228 | ttyflush(tp, FREAD|FWRITE); |
941944c9 | 229 | tp->t_state &= ~TS_TBLOCK; |
50e2732b | 230 | } |
600d5712 MK |
231 | /* |
232 | * Block further input iff: | |
233 | * Current input > threshold AND input is available to user program | |
234 | */ | |
96ea38ce | 235 | if (x >= TTYHOG/2 && (tp->t_state & TS_TBLOCK) == 0 && |
2c6a4e11 MT |
236 | (!(tp->t_lflag&ICANON)) || (tp->t_canq.c_cc > 0) && |
237 | tp->t_cc[VSTOP] != POSIX_V_DISABLE) { | |
238 | if (putc(tp->t_cc[VSTOP], &tp->t_outq)==0) { | |
600d5712 MK |
239 | tp->t_state |= TS_TBLOCK; |
240 | ttstart(tp); | |
241 | } | |
50e2732b | 242 | } |
89dc6dfb BJ |
243 | } |
244 | ||
3789a403 MK |
245 | ttstart(tp) |
246 | struct tty *tp; | |
247 | { | |
248 | ||
249 | if (tp->t_oproc) /* kludge for pty */ | |
250 | (*tp->t_oproc)(tp); | |
251 | } | |
252 | ||
253 | ttrstrt(tp) /* XXX */ | |
66ad69d6 | 254 | struct tty *tp; |
101ba270 BJ |
255 | { |
256 | ||
09b836aa | 257 | #ifdef DIAGNOSTIC |
becb115c SL |
258 | if (tp == 0) |
259 | panic("ttrstrt"); | |
09b836aa | 260 | #endif |
941944c9 | 261 | tp->t_state &= ~TS_TIMEOUT; |
50e2732b | 262 | ttstart(tp); |
101ba270 BJ |
263 | } |
264 | ||
89dc6dfb BJ |
265 | |
266 | /* | |
d554174a MK |
267 | * Common code for ioctls on tty devices. |
268 | * Called after line-discipline-specific ioctl | |
269 | * has been called to do discipline-specific functions | |
270 | * and/or reject any of these ioctl commands. | |
89dc6dfb | 271 | */ |
49c84d3f | 272 | /*ARGSUSED*/ |
4b72e2f9 SL |
273 | ttioctl(tp, com, data, flag) |
274 | register struct tty *tp; | |
275 | caddr_t data; | |
89dc6dfb | 276 | { |
3789a403 | 277 | register struct proc *p = curproc; /* XXX */ |
89dc6dfb | 278 | extern int nldisp; |
2c6a4e11 | 279 | int soft; |
849cbd39 | 280 | int s, error; |
89dc6dfb | 281 | |
50e2732b BJ |
282 | /* |
283 | * If the ioctl involves modification, | |
4f3a716e | 284 | * hang if in the background. |
50e2732b | 285 | */ |
4b72e2f9 | 286 | switch (com) { |
50e2732b | 287 | |
2c6a4e11 | 288 | case TIOCSETD: |
50e2732b | 289 | case TIOCFLUSH: |
8203fe05 | 290 | case TIOCSTI: |
f9eea644 | 291 | case TIOCSWINSZ: |
2c6a4e11 MT |
292 | case TIOCSETA: |
293 | case TIOCSETAW: | |
294 | case TIOCSETAF: | |
fa4fb7b0 MT |
295 | #ifdef COMPAT_43 |
296 | case TIOCSETP: | |
297 | case TIOCSETN: | |
298 | case TIOCSETC: | |
299 | case TIOCSLTC: | |
300 | case TIOCLBIS: | |
301 | case TIOCLBIC: | |
302 | case TIOCLSET: | |
303 | case OTIOCSETD: | |
304 | #endif | |
3789a403 MK |
305 | while (isbackground(curproc, tp) && |
306 | p->p_pgrp->pg_jobc && (p->p_flag&SPPWAIT) == 0 && | |
307 | (p->p_sigignore & sigmask(SIGTTOU)) == 0 && | |
308 | (p->p_sigmask & sigmask(SIGTTOU)) == 0) { | |
309 | pgsignal(p->p_pgrp, SIGTTOU, 1); | |
eea83fd3 MT |
310 | if (error = ttysleep(tp, (caddr_t)&lbolt, |
311 | TTOPRI | PCATCH, ttybg, 0)) | |
09b836aa | 312 | return (error); |
50e2732b BJ |
313 | } |
314 | break; | |
315 | } | |
316 | ||
becb115c SL |
317 | /* |
318 | * Process the ioctl. | |
319 | */ | |
4b72e2f9 | 320 | switch (com) { |
89dc6dfb | 321 | |
fc6972ae | 322 | /* get discipline number */ |
89dc6dfb | 323 | case TIOCGETD: |
4b72e2f9 | 324 | *(int *)data = tp->t_line; |
89dc6dfb BJ |
325 | break; |
326 | ||
fc6972ae | 327 | /* set line discipline */ |
4b72e2f9 SL |
328 | case TIOCSETD: { |
329 | register int t = *(int *)data; | |
2c6a4e11 | 330 | dev_t dev = tp->t_dev; |
e39f9ea6 | 331 | dev_t dev = tp->t_dev; |
4b72e2f9 | 332 | |
e39f9ea6 | 333 | if ((unsigned)t >= nldisp) |
4a003df3 | 334 | return (ENXIO); |
2eaeef4d MK |
335 | if (t != tp->t_line) { |
336 | s = spltty(); | |
adacc19e | 337 | (*linesw[tp->t_line].l_close)(tp, flag); |
2eaeef4d MK |
338 | error = (*linesw[t].l_open)(dev, tp); |
339 | if (error) { | |
2c6a4e11 | 340 | (void)(*linesw[tp->t_line].l_open)(dev, tp); |
2eaeef4d MK |
341 | splx(s); |
342 | return (error); | |
343 | } | |
344 | tp->t_line = t; | |
4a003df3 | 345 | splx(s); |
4a003df3 | 346 | } |
2c6a4e11 MT |
347 | if (tp->t_trace & TTRACE_STATE) |
348 | ttytrace(com, tp); | |
89dc6dfb | 349 | break; |
4b72e2f9 | 350 | } |
89dc6dfb | 351 | |
fc6972ae | 352 | /* prevent more opens on channel */ |
152c2598 BJ |
353 | case TIOCEXCL: |
354 | tp->t_state |= TS_XCLUDE; | |
355 | break; | |
356 | ||
357 | case TIOCNXCL: | |
358 | tp->t_state &= ~TS_XCLUDE; | |
359 | break; | |
360 | ||
89dc6dfb | 361 | case TIOCHPCL: |
2c6a4e11 | 362 | tp->t_cflag |= HUPCL; |
89dc6dfb BJ |
363 | break; |
364 | ||
7d973a4d | 365 | case TIOCFLUSH: { |
4b72e2f9 SL |
366 | register int flags = *(int *)data; |
367 | ||
368 | if (flags == 0) | |
7d973a4d | 369 | flags = FREAD|FWRITE; |
4b72e2f9 SL |
370 | else |
371 | flags &= FREAD|FWRITE; | |
88a7a62a | 372 | ttyflush(tp, flags); |
89dc6dfb | 373 | break; |
4568c08e | 374 | } |
89dc6dfb | 375 | |
66ad69d6 MT |
376 | case FIOASYNC: |
377 | if (*(int *)data) | |
378 | tp->t_state |= TS_ASYNC; | |
379 | else | |
380 | tp->t_state &= ~TS_ASYNC; | |
381 | break; | |
382 | ||
383 | case FIONBIO: | |
384 | break; /* XXX remove */ | |
385 | ||
fc6972ae | 386 | /* return number of characters immediately available */ |
4b72e2f9 SL |
387 | case FIONREAD: |
388 | *(off_t *)data = ttnread(tp); | |
8062c8a7 | 389 | break; |
8062c8a7 | 390 | |
b968e450 SL |
391 | case TIOCOUTQ: |
392 | *(int *)data = tp->t_outq.c_cc; | |
393 | break; | |
394 | ||
a8d3bf7f | 395 | case TIOCSTOP: |
4f3a716e | 396 | s = spltty(); |
becb115c | 397 | if ((tp->t_state&TS_TTSTOP) == 0) { |
bfcf09ee BJ |
398 | tp->t_state |= TS_TTSTOP; |
399 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
400 | } | |
4b72e2f9 | 401 | splx(s); |
bfcf09ee BJ |
402 | break; |
403 | ||
a8d3bf7f | 404 | case TIOCSTART: |
4f3a716e | 405 | s = spltty(); |
2c6a4e11 | 406 | if ((tp->t_state&TS_TTSTOP) || (tp->t_lflag&FLUSHO)) { |
bfcf09ee | 407 | tp->t_state &= ~TS_TTSTOP; |
2c6a4e11 | 408 | tp->t_lflag &= ~FLUSHO; |
bfcf09ee BJ |
409 | ttstart(tp); |
410 | } | |
4b72e2f9 | 411 | splx(s); |
bfcf09ee BJ |
412 | break; |
413 | ||
8203fe05 SL |
414 | /* |
415 | * Simulate typing of a character at the terminal. | |
416 | */ | |
417 | case TIOCSTI: | |
3789a403 | 418 | if (p->p_ucred->cr_uid && (flag & FREAD) == 0) |
477d62ec | 419 | return (EPERM); |
3789a403 | 420 | if (p->p_ucred->cr_uid && !isctty(p, tp)) |
8203fe05 | 421 | return (EACCES); |
becb115c | 422 | (*linesw[tp->t_line].l_rint)(*(char *)data, tp); |
8203fe05 SL |
423 | break; |
424 | ||
2c6a4e11 MT |
425 | case TIOCGETA: { |
426 | struct termios *t = (struct termios *)data; | |
427 | bcopy(&tp->t_termio, t, sizeof(struct termios)); | |
428 | if (tp->t_trace & TTRACE_STATE) | |
429 | ttytrace(com, tp); | |
430 | break; | |
431 | } | |
432 | ||
2c6a4e11 MT |
433 | if (com == TIOCSETAF || com == TIOCSETAFS) |
434 | ttywflush(tp); | |
435 | else { | |
436 | if (com == TIOCSETAW || com == TIOCSETAWS) | |
437 | ttywait(tp); | |
438 | if ((t->c_lflag&ICANON) != (tp->t_lflag&ICANON)) | |
439 | if (t->c_lflag&ICANON) { | |
440 | tp->t_lflag |= PENDIN; | |
441 | ttwakeup(tp); | |
442 | } | |
443 | else { | |
444 | struct clist tq; | |
445 | ||
446 | catq(&tp->t_rawq, &tp->t_canq); | |
447 | tq = tp->t_rawq; | |
448 | tp->t_rawq = tp->t_canq; | |
449 | tp->t_canq = tq; | |
450 | } | |
88a7a62a | 451 | } |
2c6a4e11 MT |
452 | tp->t_iflag = t->c_iflag; |
453 | tp->t_oflag = t->c_oflag; | |
454 | tp->t_lflag = t->c_lflag; | |
455 | bcopy(t->c_cc, tp->t_cc, sizeof(t->c_cc)); | |
456 | if (!soft) { | |
457 | tp->t_cflag = t->c_cflag; | |
458 | tp->t_ispeed = t->c_ispeed; | |
459 | tp->t_ospeed = t->c_ospeed; | |
88a7a62a | 460 | } |
e39f9ea6 MT |
461 | tp->t_iflag = t->c_iflag; |
462 | tp->t_oflag = t->c_oflag; | |
face72c1 MT |
463 | /* |
464 | * Make the EXTPROC bit read only. | |
465 | */ | |
466 | if (tp->t_lflag&EXTPROC) | |
467 | t->c_lflag |= EXTPROC; | |
468 | else | |
469 | t->c_lflag &= ~EXTPROC; | |
e39f9ea6 MT |
470 | tp->t_lflag = t->c_lflag; |
471 | bcopy(t->c_cc, tp->t_cc, sizeof(t->c_cc)); | |
88a7a62a | 472 | splx(s); |
2c6a4e11 MT |
473 | if (tp->t_trace & TTRACE_STATE) |
474 | ttytrace(com, tp); | |
88a7a62a SL |
475 | break; |
476 | } | |
477 | ||
4f3a716e | 478 | /* |
e39f9ea6 | 479 | * Set terminal process group. |
4f3a716e | 480 | */ |
245aeefa | 481 | case TIOCSPGRP: { |
e39f9ea6 MT |
482 | register struct pgrp *pgrp = pgfind(*(int *)data); |
483 | ||
232c0273 MT |
484 | if (!isctty(p, tp)) |
485 | return (ENOTTY); | |
fa4fb7b0 | 486 | else if (pgrp == NULL || pgrp->pg_session != p->p_session) |
232c0273 MT |
487 | return (EPERM); |
488 | tp->t_pgrp = pgrp; | |
88a7a62a | 489 | break; |
245aeefa | 490 | } |
88a7a62a SL |
491 | |
492 | case TIOCGPGRP: | |
3789a403 | 493 | if (!isctty(p, tp)) |
232c0273 | 494 | return (ENOTTY); |
500e26a6 | 495 | *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; |
88a7a62a SL |
496 | break; |
497 | ||
f9eea644 | 498 | case TIOCSWINSZ: |
245aeefa JB |
499 | if (bcmp((caddr_t)&tp->t_winsize, data, |
500 | sizeof (struct winsize))) { | |
f9eea644 | 501 | tp->t_winsize = *(struct winsize *)data; |
face72c1 | 502 | pgsignal(tp->t_pgrp, SIGWINCH, 1); |
f9eea644 JB |
503 | } |
504 | break; | |
505 | ||
506 | case TIOCGWINSZ: | |
507 | *(struct winsize *)data = tp->t_winsize; | |
508 | break; | |
509 | ||
adf4bc89 MK |
510 | case TIOCCONS: |
511 | if (*(int *)data) { | |
c0d5efb1 KM |
512 | if (constty && constty != tp && |
513 | (constty->t_state & (TS_CARR_ON|TS_ISOPEN)) == | |
514 | (TS_CARR_ON|TS_ISOPEN)) | |
adf4bc89 MK |
515 | return (EBUSY); |
516 | #ifndef UCONSOLE | |
3789a403 | 517 | if (error = suser(p->p_ucred, &p->p_acflag)) |
849cbd39 | 518 | return (error); |
adf4bc89 MK |
519 | #endif |
520 | constty = tp; | |
521 | } else if (tp == constty) | |
1eebc1a7 | 522 | constty = NULL; |
adf4bc89 MK |
523 | break; |
524 | ||
6cec2da2 MK |
525 | case TIOCDRAIN: |
526 | if (error = ttywait(tp)) | |
527 | return (error); | |
528 | break; | |
529 | ||
2c6a4e11 MT |
530 | /* allow old ioctls for now */ |
531 | case TIOCGETP: | |
532 | case TIOCSETP: | |
533 | case TIOCSETN: | |
534 | case TIOCGETC: | |
535 | case TIOCSETC: | |
536 | case TIOCSLTC: | |
537 | case TIOCGLTC: | |
538 | case TIOCLBIS: | |
539 | case TIOCLBIC: | |
540 | case TIOCLSET: | |
541 | case TIOCLGET: | |
542 | return(ottioctl(tp, com, data, flag)); | |
543 | ||
89dc6dfb | 544 | default: |
3789a403 MK |
545 | #ifdef COMPAT_43 |
546 | return (ttcompat(tp, com, data, flag)); | |
547 | #else | |
fc6972ae | 548 | return (-1); |
3789a403 | 549 | #endif |
89dc6dfb | 550 | } |
fc6972ae | 551 | return (0); |
89dc6dfb | 552 | } |
e1d74936 | 553 | |
2c6a4e11 MT |
554 | /* |
555 | * DEBUG - to be removed | |
556 | */ | |
557 | ttytrace(ioc, tp) | |
558 | struct tty *tp; | |
559 | { | |
560 | register u_char *cc = tp->t_cc; | |
561 | char comm[MAXCOMLEN+1]; | |
562 | static int seq = 0; | |
563 | ||
564 | bcopy(u.u_comm, comm, MAXCOMLEN+1); | |
565 | comm[MAXCOMLEN] = '\0'; | |
566 | ||
567 | /* trace changes to line disciplines */ | |
568 | if (ioc == TIOCSETD) { | |
569 | log(LOG_LOCAL4|LOG_DEBUG, "%s:%x:%x:%x:%x\n", | |
570 | comm, ioc, u.u_procp->p_pid, tp->t_dev, tp->t_line); | |
571 | return; | |
572 | } | |
573 | ||
574 | /* | |
575 | * format for the trace record is: | |
576 | * | |
577 | * u_comm:ioctl:pid:dev_t:ldisc:iflag:oflag:lflag:cflag:ispeed: | |
578 | * ospeed:cc's...:seq | |
579 | * | |
580 | * u_comm is a string and all other values are hex. "cc's..." | |
581 | * stands for control chars 0 through NCC-1. seq is a sequence # | |
582 | * to force syslogd to log every entry (rather than hold them to | |
583 | * print "last message repeated...". | |
584 | */ | |
585 | 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", | |
586 | comm, ioc, u.u_procp->p_pid, tp->t_dev, tp->t_line, | |
587 | tp->t_iflag, tp->t_oflag, tp->t_lflag, tp->t_cflag, | |
588 | tp->t_ispeed, tp->t_ospeed, cc[0], cc[1], cc[2], cc[3], | |
589 | cc[4], cc[5], cc[6], cc[7], cc[8], cc[9], cc[10], cc[11], | |
590 | cc[12], cc[13], cc[14], cc[15], cc[16], cc[17], cc[18], | |
591 | cc[19], seq++); | |
592 | } | |
593 | ||
e1d74936 BJ |
594 | ttnread(tp) |
595 | struct tty *tp; | |
596 | { | |
597 | int nread = 0; | |
598 | ||
2c6a4e11 | 599 | if (tp->t_lflag & PENDIN) |
e1d74936 BJ |
600 | ttypend(tp); |
601 | nread = tp->t_canq.c_cc; | |
2c6a4e11 | 602 | if (tp->t_lflag & ICANON == 0) |
e1d74936 BJ |
603 | nread += tp->t_rawq.c_cc; |
604 | return (nread); | |
605 | } | |
606 | ||
941944c9 | 607 | ttselect(dev, rw) |
e1d74936 | 608 | dev_t dev; |
941944c9 | 609 | int rw; |
e1d74936 BJ |
610 | { |
611 | register struct tty *tp = &cdevsw[major(dev)].d_ttys[minor(dev)]; | |
612 | int nread; | |
4f3a716e | 613 | int s = spltty(); |
e1d74936 | 614 | |
941944c9 | 615 | switch (rw) { |
e1d74936 BJ |
616 | |
617 | case FREAD: | |
618 | nread = ttnread(tp); | |
66ad69d6 | 619 | if (nread > 0 || |
09b836aa | 620 | ((tp->t_cflag&CLOCAL) == 0 && (tp->t_state&TS_CARR_ON) == 0)) |
941944c9 | 621 | goto win; |
89b8a44c | 622 | if (tp->t_rsel && tp->t_rsel->p_wchan == (caddr_t)&selwait) |
941944c9 | 623 | tp->t_state |= TS_RCOLL; |
e1d74936 | 624 | else |
3789a403 | 625 | tp->t_rsel = curproc; |
941944c9 | 626 | break; |
e1d74936 | 627 | |
941944c9 | 628 | case FWRITE: |
e39f9ea6 | 629 | if (tp->t_outq.c_cc <= tp->t_lowat) |
941944c9 | 630 | goto win; |
941944c9 BJ |
631 | if (tp->t_wsel && tp->t_wsel->p_wchan == (caddr_t)&selwait) |
632 | tp->t_state |= TS_WCOLL; | |
633 | else | |
3789a403 | 634 | tp->t_wsel = curproc; |
941944c9 | 635 | break; |
e1d74936 | 636 | } |
941944c9 BJ |
637 | splx(s); |
638 | return (0); | |
639 | win: | |
640 | splx(s); | |
641 | return (1); | |
e1d74936 | 642 | } |
8bba2b8f | 643 | |
4147b3f6 | 644 | /* |
d554174a | 645 | * Initial open of tty, or (re)entry to standard tty line discipline. |
4147b3f6 BJ |
646 | */ |
647 | ttyopen(dev, tp) | |
4b72e2f9 SL |
648 | dev_t dev; |
649 | register struct tty *tp; | |
4147b3f6 | 650 | { |
4147b3f6 | 651 | |
4147b3f6 | 652 | tp->t_dev = dev; |
e39f9ea6 | 653 | |
4147b3f6 | 654 | tp->t_state &= ~TS_WOPEN; |
4f3a716e MK |
655 | if ((tp->t_state & TS_ISOPEN) == 0) { |
656 | tp->t_state |= TS_ISOPEN; | |
f9eea644 | 657 | bzero((caddr_t)&tp->t_winsize, sizeof(tp->t_winsize)); |
2c6a4e11 MT |
658 | /* |
659 | * CHANGE: used to do a ttywflush() if it was the | |
660 | * old (old) line discipline. | |
661 | */ | |
4f3a716e | 662 | } |
fc6972ae | 663 | return (0); |
4147b3f6 BJ |
664 | } |
665 | ||
605d7712 MK |
666 | /* |
667 | * "close" a line discipline | |
668 | */ | |
adacc19e MT |
669 | ttylclose(tp, flag) |
670 | struct tty *tp; | |
671 | int flag; | |
605d7712 MK |
672 | { |
673 | ||
adacc19e MT |
674 | if (flag&IO_NDELAY) |
675 | ttyflush(tp, FREAD|FWRITE); | |
676 | else | |
677 | ttywflush(tp); | |
605d7712 MK |
678 | } |
679 | ||
4147b3f6 | 680 | /* |
d554174a MK |
681 | * Handle close() on a tty line: flush and set to initial state, |
682 | * bumping generation number so that pending read/write calls | |
683 | * can detect recycling of the tty. | |
4147b3f6 BJ |
684 | */ |
685 | ttyclose(tp) | |
4b72e2f9 | 686 | register struct tty *tp; |
4147b3f6 | 687 | { |
adf4bc89 MK |
688 | if (constty == tp) |
689 | constty = NULL; | |
605d7712 | 690 | ttyflush(tp, FREAD|FWRITE); |
232c0273 MT |
691 | tp->t_session = NULL; |
692 | tp->t_pgrp = NULL; | |
4147b3f6 | 693 | tp->t_state = 0; |
eea83fd3 | 694 | tp->t_gen++; |
09b836aa | 695 | return (0); |
4147b3f6 BJ |
696 | } |
697 | ||
605d7712 MK |
698 | /* |
699 | * Handle modem control transition on a tty. | |
700 | * Flag indicates new state of carrier. | |
701 | * Returns 0 if the line should be turned off, otherwise 1. | |
702 | */ | |
703 | ttymodem(tp, flag) | |
704 | register struct tty *tp; | |
705 | { | |
706 | ||
2c6a4e11 | 707 | if ((tp->t_state&TS_WOPEN) == 0 && (tp->t_lflag & MDMBUF)) { |
605d7712 MK |
708 | /* |
709 | * MDMBUF: do flow control according to carrier flag | |
710 | */ | |
711 | if (flag) { | |
712 | tp->t_state &= ~TS_TTSTOP; | |
713 | ttstart(tp); | |
714 | } else if ((tp->t_state&TS_TTSTOP) == 0) { | |
715 | tp->t_state |= TS_TTSTOP; | |
716 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
717 | } | |
718 | } else if (flag == 0) { | |
719 | /* | |
720 | * Lost carrier. | |
721 | */ | |
722 | tp->t_state &= ~TS_CARR_ON; | |
992909a0 MT |
723 | if (tp->t_state&TS_ISOPEN && (tp->t_cflag&CLOCAL) == 0) { |
724 | if (tp->t_session && tp->t_session->s_leader) | |
725 | psignal(tp->t_session->s_leader, SIGHUP); | |
726 | ttyflush(tp, FREAD|FWRITE); | |
727 | return (0); | |
605d7712 MK |
728 | } |
729 | } else { | |
730 | /* | |
731 | * Carrier now on. | |
732 | */ | |
733 | tp->t_state |= TS_CARR_ON; | |
66ad69d6 | 734 | ttwakeup(tp); |
605d7712 MK |
735 | } |
736 | return (1); | |
737 | } | |
738 | ||
e3f2038d MK |
739 | /* |
740 | * Default modem control routine (for other line disciplines). | |
741 | * Return argument flag, to turn off device on carrier drop. | |
742 | */ | |
2f54b5e8 MK |
743 | nullmodem(tp, flag) |
744 | register struct tty *tp; | |
e3f2038d MK |
745 | int flag; |
746 | { | |
747 | ||
748 | if (flag) | |
749 | tp->t_state |= TS_CARR_ON; | |
52004850 | 750 | else { |
e3f2038d | 751 | tp->t_state &= ~TS_CARR_ON; |
992909a0 MT |
752 | if ((tp->t_cflag&CLOCAL) == 0) { |
753 | if (tp->t_session && tp->t_session->s_leader) | |
754 | psignal(tp->t_session->s_leader, SIGHUP); | |
755 | return (0); | |
756 | } | |
52004850 | 757 | } |
992909a0 | 758 | return (1); |
e3f2038d MK |
759 | } |
760 | ||
4147b3f6 BJ |
761 | /* |
762 | * reinput pending characters after state switch | |
4f3a716e | 763 | * call at spltty(). |
4147b3f6 BJ |
764 | */ |
765 | ttypend(tp) | |
4b72e2f9 | 766 | register struct tty *tp; |
4147b3f6 BJ |
767 | { |
768 | struct clist tq; | |
769 | register c; | |
770 | ||
2c6a4e11 | 771 | tp->t_lflag &= ~PENDIN; |
becb115c | 772 | tp->t_state |= TS_TYPEN; |
4147b3f6 BJ |
773 | tq = tp->t_rawq; |
774 | tp->t_rawq.c_cc = 0; | |
775 | tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0; | |
776 | while ((c = getc(&tq)) >= 0) | |
777 | ttyinput(c, tp); | |
becb115c | 778 | tp->t_state &= ~TS_TYPEN; |
4147b3f6 BJ |
779 | } |
780 | ||
781 | /* | |
d554174a | 782 | * Process input of a single character received on a tty. |
4147b3f6 BJ |
783 | */ |
784 | ttyinput(c, tp) | |
4b72e2f9 SL |
785 | register c; |
786 | register struct tty *tp; | |
4147b3f6 | 787 | { |
2c6a4e11 MT |
788 | register int iflag = tp->t_iflag; |
789 | register int lflag = tp->t_lflag; | |
790 | register u_char *cc = tp->t_cc; | |
791 | int i, err; | |
4147b3f6 | 792 | |
becb115c SL |
793 | /* |
794 | * If input is pending take it first. | |
795 | */ | |
2c6a4e11 | 796 | if (lflag&PENDIN) |
4147b3f6 | 797 | ttypend(tp); |
e39f9ea6 MT |
798 | /* |
799 | * Gather stats. | |
800 | */ | |
2c6a4e11 | 801 | |
4147b3f6 | 802 | tk_nin++; |
e39f9ea6 MT |
803 | if (lflag&ICANON) { |
804 | tk_cancc++; | |
805 | tp->t_cancc++; | |
806 | } else { | |
807 | tk_rawcc++; | |
808 | tp->t_rawcc++; | |
809 | } | |
becb115c | 810 | /* |
2c6a4e11 | 811 | * Handle exceptional conditions (break, parity, framing). |
becb115c | 812 | */ |
2c6a4e11 MT |
813 | if (err = (c&TTY_ERRORMASK)) { |
814 | c &= TTY_CHARMASK; | |
815 | if (err&TTY_FE && !c) { /* break */ | |
816 | if (iflag&IGNBRK) | |
817 | goto endcase; | |
818 | else if (iflag&BRKINT && lflag&ISIG && | |
819 | (cc[VINTR] != POSIX_V_DISABLE)) | |
820 | c = cc[VINTR]; | |
821 | else | |
822 | c = 0; | |
823 | } else if ((err&TTY_PE && iflag&INPCK) || err&TTY_FE) { | |
824 | if (iflag&IGNPAR) | |
825 | goto endcase; | |
826 | else if (iflag&PARMRK) { | |
827 | ttyinput(0377, tp); | |
828 | ttyinput(0, tp); | |
829 | } else | |
830 | c = 0; | |
4147b3f6 | 831 | } |
becb115c | 832 | } |
2c6a4e11 MT |
833 | dprintf("<%o>\n", c); |
834 | ||
835 | /* | |
836 | * In tandem mode, check high water mark. | |
837 | */ | |
838 | if (iflag&IXOFF) | |
839 | ttyblock(tp); | |
840 | ||
becb115c | 841 | /* |
e39f9ea6 | 842 | * In tandem mode, check high water mark. |
becb115c | 843 | */ |
2c6a4e11 | 844 | if ((tp->t_state&TS_TYPEN) == 0 && (iflag&ISTRIP)) |
d554174a | 845 | c &= ~0x80; |
2c6a4e11 MT |
846 | |
847 | /* | |
848 | * Extensions to POSIX input modes which aren't controlled | |
849 | * by ICANON, ISIG, or IXON. | |
850 | */ | |
851 | if (iflag&IEXTEN) { | |
852 | if (CCEQ(cc[VLNEXT],c) && (iflag&ISTRIP)) { | |
853 | if (lflag&ECHO) | |
854 | ttyout("^\b", tp); /*XXX - presumes too much */ | |
becb115c | 855 | } |
e6745ca3 MT |
856 | /* |
857 | * Signals. | |
858 | */ | |
859 | if (lflag&ISIG) { | |
860 | if (CCEQ(cc[VINTR], c) || CCEQ(cc[VQUIT], c)) { | |
861 | if ((lflag&NOFLSH) == 0) | |
862 | ttyflush(tp, FREAD|FWRITE); | |
4147b3f6 | 863 | ttyecho(c, tp); |
2c6a4e11 | 864 | tp->t_lflag |= FLUSHO; |
4147b3f6 | 865 | } |
e6745ca3 MT |
866 | if (CCEQ(cc[VSUSP], c)) { |
867 | if ((lflag&NOFLSH) == 0) | |
868 | ttyflush(tp, FREAD); | |
869 | ttyecho(c, tp); | |
870 | pgsignal(tp->t_pgrp, SIGTSTP, 1); | |
871 | goto endcase; | |
872 | } | |
becb115c | 873 | } |
2c6a4e11 MT |
874 | if (iflag&IXON) { |
875 | if (CCEQ(cc[VSTOP],c)) { | |
876 | if ((tp->t_state&TS_TTSTOP) == 0) { | |
877 | tp->t_state |= TS_TTSTOP; | |
878 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
879 | return; | |
880 | } | |
881 | if (!CCEQ(cc[VSTART], c)) | |
882 | return; | |
883 | /* | |
884 | * if VSTART == VSTOP we toggle | |
885 | */ | |
886 | goto endcase; | |
becb115c | 887 | } |
2c6a4e11 MT |
888 | if (CCEQ(cc[VSTART], c)) |
889 | goto restartoutput; | |
becb115c | 890 | } |
2c6a4e11 MT |
891 | c = unputc(&tp->t_rawq); |
892 | } while (c != ' ' && c != '\t'); | |
893 | (void) putc(c, &tp->t_rawq); | |
894 | goto endcase; | |
895 | } | |
896 | /* | |
897 | * reprint line (^R) | |
898 | */ | |
899 | if (CCEQ(cc[VREPRINT], c)) { | |
900 | ttyretype(tp); | |
901 | goto endcase; | |
becb115c | 902 | } |
becb115c SL |
903 | /* |
904 | * Check for input buffer overflow | |
905 | */ | |
3789a403 | 906 | if (tp->t_rawq.c_cc + tp->t_canq.c_cc >= TTYHOG) { |
2c6a4e11 MT |
907 | if (iflag&IMAXBEL) { |
908 | if (tp->t_outq.c_cc < TTHIWAT(tp)) | |
909 | (void) ttyoutput(CTRL('g'), tp); | |
910 | } else | |
911 | ttyflush(tp, FREAD | FWRITE); | |
becb115c | 912 | goto endcase; |
7c9f96c0 | 913 | } |
becb115c SL |
914 | /* |
915 | * Put data char in q for user and | |
916 | * wakeup on seeing a line delimiter. | |
917 | */ | |
918 | if (putc(c, &tp->t_rawq) >= 0) { | |
3789a403 MK |
919 | if ((lflag&ICANON) == 0) { |
920 | ttwakeup(tp); | |
921 | ttyecho(c, tp); | |
922 | goto endcase; | |
923 | } | |
2c6a4e11 | 924 | if (ttbreakc(c)) { |
becb115c SL |
925 | tp->t_rocount = 0; |
926 | catq(&tp->t_rawq, &tp->t_canq); | |
4147b3f6 | 927 | ttwakeup(tp); |
becb115c SL |
928 | } else if (tp->t_rocount++ == 0) |
929 | tp->t_rocol = tp->t_col; | |
2c6a4e11 MT |
930 | if (CCEQ(cc[VQUOTE], c) && (iflag&ISTRIP)) |
931 | tp->t_state |= TS_QUOT; /* '\' escape */ | |
becb115c | 932 | if (tp->t_state&TS_ERASE) { |
e39f9ea6 MT |
933 | /* |
934 | * end of prterase \.../ | |
935 | */ | |
2c6a4e11 MT |
936 | /* |
937 | * end of prterase \.../ | |
938 | */ | |
becb115c SL |
939 | tp->t_state &= ~TS_ERASE; |
940 | (void) ttyoutput('/', tp); | |
941 | } | |
942 | i = tp->t_col; | |
4147b3f6 | 943 | ttyecho(c, tp); |
2c6a4e11 MT |
944 | if (CCEQ(cc[VEOF], c) && lflag&ECHO) { |
945 | /* | |
946 | * Place the cursor over the '^' of the ^D. | |
947 | */ | |
becb115c SL |
948 | i = MIN(2, tp->t_col - i); |
949 | while (i > 0) { | |
950 | (void) ttyoutput('\b', tp); | |
951 | i--; | |
952 | } | |
953 | } | |
4147b3f6 | 954 | } |
becb115c SL |
955 | endcase: |
956 | /* | |
2c6a4e11 | 957 | * IXANY means allow any character to restart output. |
becb115c | 958 | */ |
2c6a4e11 MT |
959 | if (tp->t_state&TS_TTSTOP && (iflag&IXANY == 0) |
960 | && cc[VSTART] != cc[VSTOP]) | |
4147b3f6 | 961 | return; |
2c6a4e11 | 962 | |
becb115c | 963 | restartoutput: |
4147b3f6 | 964 | tp->t_state &= ~TS_TTSTOP; |
2c6a4e11 | 965 | tp->t_lflag &= ~FLUSHO; |
becb115c | 966 | startoutput: |
4147b3f6 BJ |
967 | ttstart(tp); |
968 | } | |
969 | ||
970 | /* | |
d554174a MK |
971 | * Output a single character on a tty, doing output processing |
972 | * as needed (expanding tabs, newline processing, etc.). | |
973 | * Returns < 0 if putc succeeds, otherwise returns char to resend. | |
4147b3f6 BJ |
974 | * Must be recursive. |
975 | */ | |
976 | ttyoutput(c, tp) | |
977 | register c; | |
978 | register struct tty *tp; | |
979 | { | |
d554174a | 980 | register int col; |
2c6a4e11 MT |
981 | if (!(tp->t_oflag&OPOST)) { |
982 | if (tp->t_lflag&FLUSHO) | |
4147b3f6 BJ |
983 | return (-1); |
984 | if (putc(c, &tp->t_outq)) | |
4b72e2f9 | 985 | return (c); |
4147b3f6 | 986 | tk_nout++; |
e39f9ea6 | 987 | tp->t_outcc++; |
4147b3f6 BJ |
988 | return (-1); |
989 | } | |
2c6a4e11 | 990 | c &= 0377; |
4147b3f6 | 991 | /* |
d554174a | 992 | * Do tab expansion if OXTABS is set. |
face72c1 MT |
993 | * Special case if we have external processing, we don't |
994 | * do the tab expansion because we'll probably get it | |
995 | * wrong. If tab expansion needs to be done, let it | |
996 | * happen externally. | |
4147b3f6 | 997 | */ |
2c6a4e11 | 998 | if (c == '\t' && tp->t_oflag&OXTABS ) { |
4147b3f6 BJ |
999 | register int s; |
1000 | ||
1001 | c = 8 - (tp->t_col&7); | |
2c6a4e11 | 1002 | if ((tp->t_lflag&FLUSHO) == 0) { |
4f3a716e | 1003 | s = spltty(); /* don't interrupt tabs */ |
4147b3f6 BJ |
1004 | c -= b_to_q(" ", c, &tp->t_outq); |
1005 | tk_nout += c; | |
e39f9ea6 | 1006 | tp->t_outcc += c; |
4147b3f6 BJ |
1007 | splx(s); |
1008 | } | |
1009 | tp->t_col += c; | |
1010 | return (c ? -1 : '\t'); | |
1011 | } | |
e39f9ea6 | 1012 | if (c == CEOT && oflag&ONOEOT) |
3789a403 | 1013 | return (-1); |
4147b3f6 | 1014 | tk_nout++; |
e39f9ea6 | 1015 | tp->t_outcc++; |
2c6a4e11 | 1016 | #ifdef notdef |
4147b3f6 | 1017 | /* |
d554174a MK |
1018 | * Newline translation: if ONLCR is set, |
1019 | * translate newline into "\r\n". | |
4147b3f6 | 1020 | */ |
2c6a4e11 | 1021 | #endif |
e39f9ea6 MT |
1022 | if ((tp->t_lflag&FLUSHO) == 0 && putc(c, &tp->t_outq)) |
1023 | return (c); | |
2c6a4e11 | 1024 | if ((tp->t_lflag&FLUSHO) == 0 && putc(c, &tp->t_outq)) |
4147b3f6 | 1025 | return (c); |
3789a403 | 1026 | |
d554174a MK |
1027 | col = tp->t_col; |
1028 | switch (CCLASS(c)) { | |
4147b3f6 BJ |
1029 | |
1030 | case ORDINARY: | |
d554174a | 1031 | col++; |
4147b3f6 BJ |
1032 | |
1033 | case CONTROL: | |
1034 | break; | |
1035 | ||
1036 | case BACKSPACE: | |
d554174a MK |
1037 | if (col > 0) |
1038 | col--; | |
4147b3f6 BJ |
1039 | break; |
1040 | ||
1041 | case NEWLINE: | |
d554174a | 1042 | col = 0; |
4147b3f6 BJ |
1043 | break; |
1044 | ||
1045 | case TAB: | |
d554174a | 1046 | col = (col + 8) &~ 0x7; |
4147b3f6 BJ |
1047 | break; |
1048 | ||
4147b3f6 | 1049 | case RETURN: |
d554174a | 1050 | col = 0; |
4147b3f6 | 1051 | } |
d554174a | 1052 | tp->t_col = col; |
4147b3f6 BJ |
1053 | return (-1); |
1054 | } | |
1055 | ||
1056 | /* | |
d554174a | 1057 | * Process a read call on a tty device. |
4147b3f6 | 1058 | */ |
66ad69d6 | 1059 | ttread(tp, uio, flag) |
4b72e2f9 | 1060 | register struct tty *tp; |
d6d7360b | 1061 | struct uio *uio; |
4147b3f6 BJ |
1062 | { |
1063 | register struct clist *qp; | |
2c6a4e11 MT |
1064 | register int c, t_flags; |
1065 | register long lflag = tp->t_lflag; | |
1066 | register long iflag = tp->t_iflag; | |
1067 | register u_char *cc = tp->t_cc; | |
875a1e2c | 1068 | int s, first, error = 0; |
4147b3f6 | 1069 | |
2c6a4e11 | 1070 | |
4147b3f6 | 1071 | loop: |
0f12c7be | 1072 | lflag = tp->t_lflag; |
66ad69d6 | 1073 | s = spltty(); |
becb115c | 1074 | /* |
66ad69d6 | 1075 | * take pending input first |
becb115c | 1076 | */ |
2c6a4e11 | 1077 | if (tp->t_lflag&PENDIN) |
4147b3f6 | 1078 | ttypend(tp); |
875a1e2c | 1079 | splx(s); |
09b836aa | 1080 | |
becb115c SL |
1081 | /* |
1082 | * Hang process if it's in the background. | |
1083 | */ | |
3789a403 MK |
1084 | if (isbackground(p, tp)) { |
1085 | if ((p->p_sigignore & sigmask(SIGTTIN)) || | |
1086 | (p->p_sigmask & sigmask(SIGTTIN)) || | |
1087 | p->p_flag&SPPWAIT || p->p_pgrp->pg_jobc == 0) | |
840510a3 | 1088 | return (EIO); |
3789a403 | 1089 | pgsignal(p->p_pgrp, SIGTTIN, 1); |
eea83fd3 MT |
1090 | if (error = ttysleep(tp, (caddr_t)&lbolt, TTIPRI | PCATCH, |
1091 | ttybg, 0)) | |
09b836aa | 1092 | return (error); |
58786a81 | 1093 | goto loop; |
4147b3f6 | 1094 | } |
09b836aa | 1095 | |
becb115c | 1096 | /* |
2c6a4e11 MT |
1097 | * If canonical, use the canonical queue, |
1098 | * else use the raw queue. | |
becb115c | 1099 | */ |
2c6a4e11 | 1100 | qp = lflag&ICANON ? &tp->t_canq : &tp->t_rawq; |
09b836aa | 1101 | |
becb115c | 1102 | /* |
09b836aa MK |
1103 | * If there is no input, sleep on rawq |
1104 | * awaiting hardware receipt and notification. | |
1105 | * If we have data, we don't need to check for carrier. | |
becb115c | 1106 | */ |
4f3a716e | 1107 | s = spltty(); |
becb115c | 1108 | if (qp->c_cc <= 0) { |
09b836aa MK |
1109 | int carrier; |
1110 | ||
1111 | carrier = (tp->t_state&TS_CARR_ON) || (tp->t_cflag&CLOCAL); | |
1112 | if (!carrier && tp->t_state&TS_ISOPEN) { | |
875a1e2c | 1113 | splx(s); |
09b836aa | 1114 | return (0); /* EOF */ |
4147b3f6 | 1115 | } |
c4ec2128 | 1116 | if (flag & IO_NDELAY) { |
66ad69d6 MT |
1117 | splx(s); |
1118 | return (EWOULDBLOCK); | |
1119 | } | |
eea83fd3 | 1120 | error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH, |
09b836aa | 1121 | carrier ? ttyin : ttopen, 0); |
875a1e2c | 1122 | splx(s); |
eea83fd3 | 1123 | if (error) |
09b836aa | 1124 | return (error); |
becb115c SL |
1125 | goto loop; |
1126 | } | |
875a1e2c | 1127 | splx(s); |
09b836aa | 1128 | |
becb115c | 1129 | /* |
2c6a4e11 | 1130 | * Input present, check for input mapping and processing. |
becb115c SL |
1131 | */ |
1132 | first = 1; | |
1133 | while ((c = getc(qp)) >= 0) { | |
becb115c | 1134 | /* |
2c6a4e11 | 1135 | * delayed suspend (^Y) |
becb115c | 1136 | */ |
2c6a4e11 | 1137 | if (CCEQ(cc[VDSUSP], c) && lflag&ISIG) { |
face72c1 | 1138 | pgsignal(tp->t_pgrp, SIGTSTP, 1); |
becb115c | 1139 | if (first) { |
eea83fd3 MT |
1140 | if (error = ttysleep(tp, (caddr_t)&lbolt, |
1141 | TTIPRI | PCATCH, ttybg, 0)) | |
09b836aa | 1142 | break; |
becb115c SL |
1143 | goto loop; |
1144 | } | |
1145 | break; | |
4147b3f6 | 1146 | } |
becb115c | 1147 | /* |
2c6a4e11 | 1148 | * Interpret EOF only in canonical mode. |
becb115c | 1149 | */ |
2c6a4e11 | 1150 | if (CCEQ(cc[VEOF], c) && lflag&ICANON) |
becb115c SL |
1151 | break; |
1152 | /* | |
1153 | * Give user character. | |
1154 | */ | |
2c6a4e11 | 1155 | error = ureadc(iflag&ISTRIP ? c & 0177 : c , uio); |
becb115c SL |
1156 | if (error) |
1157 | break; | |
9ec65acb | 1158 | if (uio->uio_resid == 0) |
becb115c SL |
1159 | break; |
1160 | /* | |
2c6a4e11 | 1161 | * In canonical mode check for a "break character" |
becb115c SL |
1162 | * marking the end of a "line of input". |
1163 | */ | |
2c6a4e11 | 1164 | if (lflag&ICANON && ttbreakc(c)) { |
becb115c | 1165 | break; |
2c6a4e11 | 1166 | } |
becb115c | 1167 | first = 0; |
4147b3f6 | 1168 | } |
becb115c SL |
1169 | /* |
1170 | * Look to unblock output now that (presumably) | |
1171 | * the input queue has gone down. | |
1172 | */ | |
2c6a4e11 MT |
1173 | if (tp->t_state&TS_TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) { |
1174 | if (cc[VSTART] != POSIX_V_DISABLE | |
1175 | && putc(cc[VSTART], &tp->t_outq) == 0) { | |
4147b3f6 BJ |
1176 | tp->t_state &= ~TS_TBLOCK; |
1177 | ttstart(tp); | |
1178 | } | |
2c6a4e11 | 1179 | } |
e39f9ea6 | 1180 | } |
840510a3 | 1181 | return (error); |
4147b3f6 BJ |
1182 | } |
1183 | ||
605d7712 MK |
1184 | /* |
1185 | * Check the output queue on tp for space for a kernel message | |
1186 | * (from uprintf/tprintf). Allow some space over the normal | |
1187 | * hiwater mark so we don't lose messages due to normal flow | |
1188 | * control, but don't let the tty run amok. | |
ca9b16e5 MK |
1189 | * Sleeps here are not interruptible, but we return prematurely |
1190 | * if new signals come in. | |
605d7712 MK |
1191 | */ |
1192 | ttycheckoutq(tp, wait) | |
1193 | register struct tty *tp; | |
1194 | int wait; | |
1195 | { | |
ca9b16e5 | 1196 | int hiwat, s, oldsig; |
6cec2da2 | 1197 | extern int wakeup(); |
605d7712 | 1198 | |
e39f9ea6 | 1199 | hiwat = tp->t_hiwat; |
605d7712 | 1200 | s = spltty(); |
3789a403 | 1201 | oldsig = curproc->p_sig; |
605d7712 | 1202 | if (tp->t_outq.c_cc > hiwat + 200) |
fb1db32c MK |
1203 | while (tp->t_outq.c_cc > hiwat) { |
1204 | ttstart(tp); | |
3789a403 | 1205 | if (wait == 0 || curproc->p_sig != oldsig) { |
fb1db32c MK |
1206 | splx(s); |
1207 | return (0); | |
1208 | } | |
ca9b16e5 | 1209 | timeout(wakeup, (caddr_t)&tp->t_outq, hz); |
fb1db32c | 1210 | tp->t_state |= TS_ASLEEP; |
ca9b16e5 | 1211 | sleep((caddr_t)&tp->t_outq, PZERO - 1); |
605d7712 | 1212 | } |
605d7712 MK |
1213 | splx(s); |
1214 | return (1); | |
1215 | } | |
1216 | ||
4147b3f6 | 1217 | /* |
d554174a | 1218 | * Process a write call on a tty device. |
4147b3f6 | 1219 | */ |
66ad69d6 | 1220 | ttwrite(tp, uio, flag) |
4b72e2f9 | 1221 | register struct tty *tp; |
becb115c | 1222 | register struct uio *uio; |
4147b3f6 | 1223 | { |
4147b3f6 | 1224 | register char *cp; |
09b836aa | 1225 | register int cc = 0, ce; |
3789a403 | 1226 | register struct proc *p = curproc; |
becb115c | 1227 | int i, hiwat, cnt, error, s; |
4147b3f6 | 1228 | char obuf[OBUFSIZ]; |
4147b3f6 | 1229 | |
e39f9ea6 | 1230 | hiwat = tp->t_hiwat; |
becb115c SL |
1231 | cnt = uio->uio_resid; |
1232 | error = 0; | |
4147b3f6 | 1233 | loop: |
66ad69d6 | 1234 | s = spltty(); |
09b836aa | 1235 | if ((tp->t_state&TS_CARR_ON) == 0 && (tp->t_cflag&CLOCAL) == 0) { |
66ad69d6 MT |
1236 | if (tp->t_state&TS_ISOPEN) { |
1237 | splx(s); | |
1238 | return (EIO); | |
c4ec2128 | 1239 | } else if (flag & IO_NDELAY) { |
66ad69d6 | 1240 | splx(s); |
09b836aa MK |
1241 | error = EWOULDBLOCK; |
1242 | goto out; | |
66ad69d6 MT |
1243 | } else { |
1244 | /* | |
1245 | * sleep awaiting carrier | |
1246 | */ | |
eea83fd3 MT |
1247 | error = ttysleep(tp, (caddr_t)&tp->t_rawq, |
1248 | TTIPRI | PCATCH,ttopen, 0); | |
66ad69d6 | 1249 | splx(s); |
eea83fd3 | 1250 | if (error) |
09b836aa | 1251 | goto out; |
66ad69d6 MT |
1252 | goto loop; |
1253 | } | |
1254 | } | |
1255 | splx(s); | |
becb115c SL |
1256 | /* |
1257 | * Hang the process if it's in the background. | |
1258 | */ | |
3789a403 MK |
1259 | if (isbackground(p, tp) && |
1260 | tp->t_lflag&TOSTOP && (p->p_flag&SPPWAIT) == 0 && | |
1261 | (p->p_sigignore & sigmask(SIGTTOU)) == 0 && | |
1262 | (p->p_sigmask & sigmask(SIGTTOU)) == 0 && | |
1263 | p->p_pgrp->pg_jobc) { | |
1264 | pgsignal(p->p_pgrp, SIGTTOU, 1); | |
eea83fd3 MT |
1265 | if (error = ttysleep(tp, (caddr_t)&lbolt, TTIPRI | PCATCH, |
1266 | ttybg, 0)) | |
09b836aa | 1267 | goto out; |
93d2ecff | 1268 | goto loop; |
4147b3f6 | 1269 | } |
becb115c SL |
1270 | /* |
1271 | * Process the user's data in at most OBUFSIZ | |
09b836aa MK |
1272 | * chunks. Perform any output translation. |
1273 | * Keep track of high water mark, sleep on overflow | |
1274 | * awaiting device aid in acquiring new space. | |
becb115c | 1275 | */ |
09b836aa MK |
1276 | while (uio->uio_resid > 0 || cc > 0) { |
1277 | if (tp->t_lflag&FLUSHO) { | |
1278 | uio->uio_resid = 0; | |
1279 | return (0); | |
b482b2c8 | 1280 | } |
09b836aa MK |
1281 | if (tp->t_outq.c_cc > hiwat) |
1282 | goto ovhiwat; | |
becb115c | 1283 | /* |
09b836aa MK |
1284 | * Grab a hunk of data from the user, |
1285 | * unless we have some leftover from last time. | |
becb115c | 1286 | */ |
913ea2d1 | 1287 | if (cc == 0) { |
09b836aa MK |
1288 | cc = min(uio->uio_resid, OBUFSIZ); |
1289 | cp = obuf; | |
1290 | error = uiomove(cp, cc, uio); | |
1291 | if (error) { | |
1292 | cc = 0; | |
1293 | break; | |
1294 | } | |
913ea2d1 | 1295 | } |
2c6a4e11 | 1296 | #ifdef notdef |
becb115c SL |
1297 | /* |
1298 | * If nothing fancy need be done, grab those characters we | |
1299 | * can handle without any of ttyoutput's processing and | |
1300 | * just transfer them to the output q. For those chars | |
1301 | * which require special processing (as indicated by the | |
1302 | * bits in partab), call ttyoutput. After processing | |
1303 | * a hunk of data, look for FLUSHO so ^O's will take effect | |
1304 | * immediately. | |
1305 | */ | |
1306 | while (cc > 0) { | |
2c6a4e11 | 1307 | if (!(tp->t_oflag&OPOST)) |
4147b3f6 BJ |
1308 | ce = cc; |
1309 | else { | |
3f36033f | 1310 | ce = cc - scanc((unsigned)cc, (u_char *)cp, |
d554174a | 1311 | (u_char *)partab, CCLASSMASK); |
becb115c SL |
1312 | /* |
1313 | * If ce is zero, then we're processing | |
1314 | * a special character through ttyoutput. | |
1315 | */ | |
1316 | if (ce == 0) { | |
4147b3f6 BJ |
1317 | tp->t_rocount = 0; |
1318 | if (ttyoutput(*cp, tp) >= 0) { | |
93d2ecff JB |
1319 | /* no c-lists, wait a bit */ |
1320 | ttstart(tp); | |
eea83fd3 MT |
1321 | if (error = ttysleep(tp, |
1322 | (caddr_t)&lbolt, | |
1323 | TTOPRI | PCATCH, ttybuf, 0)) | |
09b836aa | 1324 | break; |
93d2ecff | 1325 | goto loop; |
4147b3f6 | 1326 | } |
becb115c | 1327 | cp++, cc--; |
2c6a4e11 | 1328 | if (tp->t_lflag&FLUSHO || |
becb115c | 1329 | tp->t_outq.c_cc > hiwat) |
4147b3f6 | 1330 | goto ovhiwat; |
becb115c | 1331 | continue; |
4147b3f6 BJ |
1332 | } |
1333 | } | |
becb115c SL |
1334 | /* |
1335 | * A bunch of normal characters have been found, | |
1336 | * transfer them en masse to the output queue and | |
1337 | * continue processing at the top of the loop. | |
1338 | * If there are any further characters in this | |
1339 | * <= OBUFSIZ chunk, the first should be a character | |
1340 | * requiring special handling by ttyoutput. | |
1341 | */ | |
4147b3f6 | 1342 | tp->t_rocount = 0; |
becb115c SL |
1343 | i = b_to_q(cp, ce, &tp->t_outq); |
1344 | ce -= i; | |
1345 | tp->t_col += ce; | |
1346 | cp += ce, cc -= ce, tk_nout += ce; | |
e39f9ea6 | 1347 | tp->t_outcc += ce; |
becb115c SL |
1348 | if (i > 0) { |
1349 | /* out of c-lists, wait a bit */ | |
4147b3f6 | 1350 | ttstart(tp); |
eea83fd3 MT |
1351 | if (error = ttysleep(tp, (caddr_t)&lbolt, |
1352 | TTOPRI | PCATCH, ttybuf, 0)) | |
09b836aa | 1353 | break; |
93d2ecff | 1354 | goto loop; |
4147b3f6 | 1355 | } |
2c6a4e11 | 1356 | if (tp->t_lflag&FLUSHO || tp->t_outq.c_cc > hiwat) |
09b836aa | 1357 | break; |
4147b3f6 | 1358 | } |
2c6a4e11 | 1359 | ttstart(tp); |
e39f9ea6 | 1360 | ttstart(tp); |
4147b3f6 | 1361 | } |
09b836aa MK |
1362 | out: |
1363 | /* | |
1364 | * If cc is nonzero, we leave the uio structure inconsistent, | |
1365 | * as the offset and iov pointers have moved forward, | |
1366 | * but it doesn't matter (the call will either return short | |
1367 | * or restart with a new uio). | |
1368 | */ | |
1369 | uio->uio_resid += cc; | |
840510a3 | 1370 | return (error); |
09b836aa | 1371 | |
4147b3f6 | 1372 | ovhiwat: |
b482b2c8 MK |
1373 | ttstart(tp); |
1374 | s = spltty(); | |
becb115c | 1375 | /* |
2c6a4e11 | 1376 | * This can only occur if FLUSHO is set in t_lflag, |
b482b2c8 | 1377 | * or if ttstart/oproc is synchronous (or very fast). |
becb115c | 1378 | */ |
4147b3f6 | 1379 | if (tp->t_outq.c_cc <= hiwat) { |
becb115c | 1380 | splx(s); |
4147b3f6 BJ |
1381 | goto loop; |
1382 | } | |
c4ec2128 | 1383 | if (flag & IO_NDELAY) { |
4f3a716e | 1384 | splx(s); |
09b836aa | 1385 | uio->uio_resid += cc; |
913ea2d1 | 1386 | if (uio->uio_resid == cnt) |
840510a3 BJ |
1387 | return (EWOULDBLOCK); |
1388 | return (0); | |
4147b3f6 BJ |
1389 | } |
1390 | tp->t_state |= TS_ASLEEP; | |
eea83fd3 | 1391 | error = ttysleep(tp, (caddr_t)&tp->t_outq, TTOPRI | PCATCH, ttyout, 0); |
becb115c | 1392 | splx(s); |
eea83fd3 | 1393 | if (error) |
09b836aa | 1394 | goto out; |
4147b3f6 BJ |
1395 | goto loop; |
1396 | } | |
1397 | ||
1398 | /* | |
1399 | * Rubout one character from the rawq of tp | |
1400 | * as cleanly as possible. | |
1401 | */ | |
1402 | ttyrub(c, tp) | |
4b72e2f9 SL |
1403 | register c; |
1404 | register struct tty *tp; | |
4147b3f6 BJ |
1405 | { |
1406 | register char *cp; | |
1407 | register int savecol; | |
1408 | int s; | |
1409 | char *nextc(); | |
1410 | ||
2c6a4e11 | 1411 | if ((tp->t_lflag&ECHO) == 0) |
4147b3f6 | 1412 | return; |
2c6a4e11 | 1413 | if (tp->t_lflag&ECHOE) { |
4147b3f6 BJ |
1414 | if (tp->t_rocount == 0) { |
1415 | /* | |
1416 | * Screwed by ttwrite; retype | |
1417 | */ | |
1418 | ttyretype(tp); | |
1419 | return; | |
1420 | } | |
2c6a4e11 | 1421 | /* if tab or newline was escaped - XXX - not 8bit */ |
e39f9ea6 | 1422 | if (c == ('\t'|TTY_QUOTE) || c == ('\n'|TTY_QUOTE)) |
4147b3f6 | 1423 | ttyrubo(tp, 2); |
d554174a | 1424 | else switch (CCLASS(c &= TTY_CHARMASK)) { |
4147b3f6 BJ |
1425 | |
1426 | case ORDINARY: | |
2c6a4e11 | 1427 | #ifdef notdef |
e39f9ea6 | 1428 | ttyrubo(tp, 1); |
4147b3f6 BJ |
1429 | break; |
1430 | ||
1431 | case VTAB: | |
1432 | case BACKSPACE: | |
1433 | case CONTROL: | |
1434 | case RETURN: | |
3789a403 | 1435 | case NEWLINE: |
2c6a4e11 | 1436 | if (tp->t_lflag&ECHOCTL) |
4147b3f6 BJ |
1437 | ttyrubo(tp, 2); |
1438 | break; | |
1439 | ||
e39f9ea6 MT |
1440 | case TAB: { |
1441 | int c; | |
1442 | ||
4147b3f6 BJ |
1443 | if (tp->t_rocount < tp->t_rawq.c_cc) { |
1444 | ttyretype(tp); | |
1445 | return; | |
1446 | } | |
4f3a716e | 1447 | s = spltty(); |
4147b3f6 | 1448 | savecol = tp->t_col; |
becb115c | 1449 | tp->t_state |= TS_CNTTB; |
2c6a4e11 | 1450 | tp->t_lflag |= FLUSHO; |
4147b3f6 | 1451 | tp->t_col = tp->t_rocol; |
becb115c | 1452 | cp = tp->t_rawq.c_cf; |
2c6a4e11 | 1453 | tp->t_lflag &= ~FLUSHO; |
becb115c | 1454 | tp->t_state &= ~TS_CNTTB; |
4147b3f6 BJ |
1455 | splx(s); |
1456 | /* | |
1457 | * savecol will now be length of the tab | |
1458 | */ | |
1459 | savecol -= tp->t_col; | |
1460 | tp->t_col += savecol; | |
1461 | if (savecol > 8) | |
1462 | savecol = 8; /* overflow screw */ | |
1463 | while (--savecol >= 0) | |
1464 | (void) ttyoutput('\b', tp); | |
1465 | break; | |
e39f9ea6 | 1466 | } |
4147b3f6 BJ |
1467 | |
1468 | default: | |
66ad69d6 | 1469 | /* XXX */ |
e39f9ea6 | 1470 | printf("ttyrub: would panic c = %d, val = %d\n", |
d554174a | 1471 | c, CCLASS(c)); |
e39f9ea6 | 1472 | /*panic("ttyrub");*/ |
4147b3f6 | 1473 | } |
2c6a4e11 | 1474 | } else if (tp->t_lflag&ECHOPRT) { |
becb115c | 1475 | if ((tp->t_state&TS_ERASE) == 0) { |
4147b3f6 | 1476 | (void) ttyoutput('\\', tp); |
becb115c | 1477 | tp->t_state |= TS_ERASE; |
4147b3f6 BJ |
1478 | } |
1479 | ttyecho(c, tp); | |
1480 | } else | |
2c6a4e11 | 1481 | ttyecho(tp->t_cc[VERASE], tp); |
4147b3f6 BJ |
1482 | tp->t_rocount--; |
1483 | } | |
1484 | ||
1485 | /* | |
1486 | * Crt back over cnt chars perhaps | |
1487 | * erasing them. | |
1488 | */ | |
1489 | ttyrubo(tp, cnt) | |
4b72e2f9 SL |
1490 | register struct tty *tp; |
1491 | int cnt; | |
4147b3f6 | 1492 | { |
2c6a4e11 | 1493 | register char *rubostring = tp->t_lflag&ECHOE ? "\b \b" : "\b"; |
4147b3f6 BJ |
1494 | |
1495 | while (--cnt >= 0) | |
09b836aa | 1496 | ttyoutstr("\b \b", tp); |
4147b3f6 BJ |
1497 | } |
1498 | ||
1499 | /* | |
1500 | * Reprint the rawq line. | |
1501 | * We assume c_cc has already been checked. | |
1502 | */ | |
1503 | ttyretype(tp) | |
4b72e2f9 | 1504 | register struct tty *tp; |
4147b3f6 BJ |
1505 | { |
1506 | register char *cp; | |
1507 | char *nextc(); | |
e39f9ea6 | 1508 | int s, c; |
4147b3f6 | 1509 | |
2c6a4e11 MT |
1510 | if (tp->t_cc[VREPRINT] != POSIX_V_DISABLE) |
1511 | ttyecho(tp->t_cc[VREPRINT], tp); | |
4147b3f6 | 1512 | (void) ttyoutput('\n', tp); |
4f3a716e | 1513 | s = spltty(); |
e39f9ea6 MT |
1514 | /*** XXX *** FIX *** NEXTC IS BROKEN - DOESN'T CHECK QUOTE |
1515 | BIT OF FIRST CHAR ****/ | |
1516 | for (cp = tp->t_canq.c_cf, c=(cp?*cp:0); cp; cp = nextc(&tp->t_canq, cp, &c)) { | |
1517 | ttyecho(c, tp); | |
1518 | } | |
1519 | for (cp = tp->t_rawq.c_cf, c=(cp?*cp:0); cp; cp = nextc(&tp->t_rawq, cp, &c)) { | |
1520 | ttyecho(c, tp); | |
1521 | } | |
becb115c | 1522 | tp->t_state &= ~TS_ERASE; |
4147b3f6 BJ |
1523 | splx(s); |
1524 | tp->t_rocount = tp->t_rawq.c_cc; | |
1525 | tp->t_rocol = 0; | |
1526 | } | |
1527 | ||
1528 | /* | |
2c6a4e11 | 1529 | * Echo a typed character to the terminal. |
4147b3f6 BJ |
1530 | */ |
1531 | ttyecho(c, tp) | |
4b72e2f9 SL |
1532 | register c; |
1533 | register struct tty *tp; | |
4147b3f6 | 1534 | { |
4147b3f6 | 1535 | c &= 0377; |
2c6a4e11 MT |
1536 | if ((tp->t_state&TS_CNTTB) == 0) |
1537 | tp->t_lflag &= ~FLUSHO; | |
1538 | if ((tp->t_lflag&ECHO) == 0 && !(tp->t_lflag&ECHONL && c == '\n')) | |
4147b3f6 | 1539 | return; |
2c6a4e11 | 1540 | if (tp->t_lflag&ECHOCTL) { |
09b836aa MK |
1541 | if ((c&TTY_CHARMASK) <= 037 && c != '\t' && c != '\n' || |
1542 | c == 0177) { | |
4147b3f6 | 1543 | (void) ttyoutput('^', tp); |
e39f9ea6 | 1544 | c &= TTY_CHARMASK; |
4147b3f6 BJ |
1545 | if (c == 0177) |
1546 | c = '?'; | |
2c6a4e11 | 1547 | #ifdef notdef |
2c6a4e11 | 1548 | #endif |
4147b3f6 BJ |
1549 | else |
1550 | c += 'A' - 1; | |
1551 | } | |
1552 | } | |
e39f9ea6 | 1553 | (void) ttyoutput(c, tp); |
4147b3f6 BJ |
1554 | * send string cp to tp |
1555 | */ | |
09b836aa | 1556 | ttyoutstr(cp, tp) |
4b72e2f9 SL |
1557 | register char *cp; |
1558 | register struct tty *tp; | |
4147b3f6 BJ |
1559 | { |
1560 | register char c; | |
1561 | ||
1562 | while (c = *cp++) | |
1563 | (void) ttyoutput(c, tp); | |
1564 | } | |
1565 | ||
d554174a MK |
1566 | /* |
1567 | * Wake up any readers on a tty. | |
1568 | */ | |
4147b3f6 | 1569 | ttwakeup(tp) |
3789a403 | 1570 | register struct tty *tp; |
4147b3f6 BJ |
1571 | { |
1572 | ||
1573 | if (tp->t_rsel) { | |
1574 | selwakeup(tp->t_rsel, tp->t_state&TS_RCOLL); | |
1575 | tp->t_state &= ~TS_RCOLL; | |
1576 | tp->t_rsel = 0; | |
1577 | } | |
88a7a62a | 1578 | if (tp->t_state & TS_ASYNC) |
face72c1 | 1579 | pgsignal(tp->t_pgrp, SIGIO, 1); |
4147b3f6 BJ |
1580 | wakeup((caddr_t)&tp->t_rawq); |
1581 | } | |
e39f9ea6 | 1582 | |
6cec2da2 MK |
1583 | /* |
1584 | * Look up a code for a specified speed in a conversion table; | |
1585 | * used by drivers to map software speed values to hardware parameters. | |
1586 | */ | |
1587 | ttspeedtab(speed, table) | |
1588 | register struct speedtab *table; | |
1589 | { | |
1590 | ||
1591 | for ( ; table->sp_speed != -1; table++) | |
1592 | if (table->sp_speed == speed) | |
1593 | return (table->sp_code); | |
1594 | return (-1); | |
1595 | } | |
1596 | ||
e39f9ea6 MT |
1597 | /* |
1598 | * set tty hi and low water marks | |
1599 | * | |
1600 | * Try to arrange the dynamics so there's about one second | |
1601 | * from hi to low water. | |
1602 | * | |
1603 | */ | |
1604 | ttsetwater(tp) | |
1605 | struct tty *tp; | |
1606 | { | |
1607 | register cps = tp->t_ospeed / 10; | |
1608 | register x; | |
1609 | ||
1610 | #define clamp(x, h, l) ((x)>h ? h : ((x)<l) ? l : (x)) | |
1611 | tp->t_lowat = x = clamp(cps/2, TTMAXLOWAT, TTMINLOWAT); | |
1612 | x += cps; | |
1613 | x = clamp(x, TTMAXHIWAT, TTMINHIWAT); | |
1614 | tp->t_hiwat = roundup(x, CBSIZE); | |
1615 | #undef clamp | |
1616 | } | |
1617 | ||
52004850 MT |
1618 | /* |
1619 | * (^T) | |
1620 | * Report on state of foreground process group. | |
1621 | */ | |
1622 | ttyinfo(tp) | |
1623 | struct tty *tp; | |
1624 | { | |
9872d890 | 1625 | register struct proc *p, *pick = NULL; |
9872d890 MT |
1626 | int x, s; |
1627 | struct timeval utime, stime; | |
96ea38ce | 1628 | #define pgtok(a) (((a)*NBPG)/1024) |
52004850 MT |
1629 | |
1630 | if (ttycheckoutq(tp,0) == 0) | |
1631 | return; | |
9872d890 MT |
1632 | /* |
1633 | * load average | |
1634 | */ | |
1635 | x = (averunnable[0] * 100 + FSCALE/2) >> FSHIFT; | |
1636 | ttyprintf(tp, "load: %d.", x/100); | |
1637 | ttyoutint(x%100, 10, 2, tp); | |
232c0273 | 1638 | if (tp->t_session == NULL) |
9872d890 MT |
1639 | ttyprintf(tp, " not a controlling terminal\n"); |
1640 | else if (tp->t_pgrp == NULL) | |
1641 | ttyprintf(tp, " no foreground process group\n"); | |
1642 | else if ((p = tp->t_pgrp->pg_mem) == NULL) | |
1643 | ttyprintf(tp, " empty foreground process group\n"); | |
52004850 | 1644 | else { |
9872d890 | 1645 | /* pick interesting process */ |
52004850 | 1646 | for (; p != NULL; p = p->p_pgrpnxt) { |
9872d890 MT |
1647 | if (proc_compare(pick, p)) |
1648 | pick = p; | |
52004850 | 1649 | } |
9872d890 MT |
1650 | ttyprintf(tp, " cmd: %s %d [%s] ", |
1651 | pick->p_comm, pick->p_pid, | |
6cec2da2 MK |
1652 | pick->p_stat == SRUN ? "running" : |
1653 | pick->p_wmesg ? pick->p_wmesg : "iowait"); | |
9872d890 MT |
1654 | /* |
1655 | * cpu time | |
1656 | */ | |
3789a403 | 1657 | if (curproc == pick) |
9872d890 MT |
1658 | s = splclock(); |
1659 | utime = pick->p_utime; | |
1660 | stime = pick->p_stime; | |
3789a403 | 1661 | if (curproc == pick) |
9872d890 MT |
1662 | splx(s); |
1663 | /* user time */ | |
1664 | x = (utime.tv_usec + 5000) / 10000; /* scale to 100's */ | |
1665 | ttyoutint(utime.tv_sec, 10, 1, tp); | |
1666 | tputchar('.', tp); | |
1667 | ttyoutint(x, 10, 2, tp); | |
1668 | tputchar('u', tp); | |
1669 | tputchar(' ', tp); | |
1670 | /* system time */ | |
1671 | x = (stime.tv_usec + 5000) / 10000; /* scale to 100's */ | |
1672 | ttyoutint(stime.tv_sec, 10, 1, tp); | |
1673 | tputchar('.', tp); | |
1674 | ttyoutint(x, 10, 2, tp); | |
1675 | tputchar('s', tp); | |
1676 | tputchar(' ', tp); | |
1677 | /* | |
1678 | * pctcpu | |
1679 | */ | |
1680 | x = pick->p_pctcpu * 10000 + FSCALE/2 >> FSHIFT; | |
1681 | ttyoutint(x/100, 10, 1, tp); | |
1682 | #ifdef notdef /* do we really want this ??? */ | |
1683 | tputchar('.', tp); | |
1684 | ttyoutint(x%100, 10, 2, tp); | |
1685 | #endif | |
3789a403 | 1686 | ttyprintf(tp, "%% %dk\n", pgtok(pick->p_vmspace->vm_rssize)); |
9872d890 MT |
1687 | } |
1688 | tp->t_rocount = 0; /* so pending input will be retyped if BS */ | |
1689 | } | |
1690 | ||
1691 | ttyoutint(n, base, min, tp) | |
1692 | register int n, base, min; | |
1693 | register struct tty *tp; | |
1694 | { | |
1695 | char info[16]; | |
1696 | register char *p = info; | |
1697 | ||
1698 | while (--min >= 0 || n) { | |
1699 | *p++ = "0123456789abcdef"[n%base]; | |
1700 | n /= base; | |
52004850 | 1701 | } |
9872d890 MT |
1702 | while (p > info) |
1703 | ttyoutput(*--p, tp); | |
52004850 MT |
1704 | } |
1705 | ||
9872d890 MT |
1706 | /* |
1707 | * Returns 1 if p2 is "better" than p1 | |
1708 | * | |
1709 | * The algorithm for picking the "interesting" process is thus: | |
1710 | * | |
1711 | * 1) (Only foreground processes are eligable - implied) | |
1712 | * 2) Runnable processes are favored over anything | |
1713 | * else. The runner with the highest cpu | |
1714 | * utilization is picked (p_cpu). Ties are | |
1715 | * broken by picking the highest pid. | |
1716 | * 3 Next, the sleeper with the shortest sleep | |
1717 | * time is favored. With ties, we pick out | |
1718 | * just "short-term" sleepers (SSINTR == 0). | |
1719 | * Further ties are broken by picking the highest | |
1720 | * pid. | |
1721 | * | |
1722 | */ | |
1723 | #define isrun(p) (((p)->p_stat == SRUN) || ((p)->p_stat == SIDL)) | |
9ca8548a KM |
1724 | #define TESTAB(a, b) ((a)<<1 | (b)) |
1725 | #define ONLYA 2 | |
1726 | #define ONLYB 1 | |
1727 | #define BOTH 3 | |
1728 | ||
9872d890 MT |
1729 | proc_compare(p1, p2) |
1730 | register struct proc *p1, *p2; | |
1731 | { | |
1732 | ||
1733 | if (p1 == NULL) | |
1734 | return (1); | |
1735 | /* | |
1736 | * see if at least one of them is runnable | |
1737 | */ | |
9ca8548a KM |
1738 | switch (TESTAB(isrun(p1), isrun(p2))) { |
1739 | case ONLYA: | |
9872d890 | 1740 | return (0); |
9ca8548a KM |
1741 | case ONLYB: |
1742 | return (1); | |
1743 | case BOTH: | |
9872d890 MT |
1744 | /* |
1745 | * tie - favor one with highest recent cpu utilization | |
1746 | */ | |
1747 | if (p2->p_cpu > p1->p_cpu) | |
1748 | return (1); | |
1749 | if (p1->p_cpu > p2->p_cpu) | |
1750 | return (0); | |
1751 | return (p2->p_pid > p1->p_pid); /* tie - return highest pid */ | |
1752 | } | |
9ca8548a KM |
1753 | /* |
1754 | * weed out zombies | |
1755 | */ | |
1756 | switch (TESTAB(p1->p_stat == SZOMB, p2->p_stat == SZOMB)) { | |
1757 | case ONLYA: | |
1758 | return (1); | |
1759 | case ONLYB: | |
1760 | return (0); | |
1761 | case BOTH: | |
1762 | return (p2->p_pid > p1->p_pid); /* tie - return highest pid */ | |
1763 | } | |
9872d890 MT |
1764 | /* |
1765 | * pick the one with the smallest sleep time | |
1766 | */ | |
1767 | if (p2->p_slptime > p1->p_slptime) | |
1768 | return (0); | |
1769 | if (p1->p_slptime > p2->p_slptime) | |
1770 | return (1); | |
1771 | /* | |
1772 | * favor one sleeping in a non-interruptible sleep | |
1773 | */ | |
1774 | if (p1->p_flag&SSINTR && (p2->p_flag&SSINTR) == 0) | |
1775 | return (1); | |
1776 | if (p2->p_flag&SSINTR && (p1->p_flag&SSINTR) == 0) | |
1777 | return (0); | |
3789a403 | 1778 | return (p2->p_pid > p1->p_pid); /* tie - return highest pid */ |
9872d890 | 1779 | } |
9ca8548a | 1780 | |
232c0273 MT |
1781 | /* |
1782 | * Output char to tty; console putchar style. | |
1783 | */ | |
1784 | tputchar(c, tp) | |
1785 | int c; | |
1786 | struct tty *tp; | |
1787 | { | |
1788 | register s = spltty(); | |
1789 | ||
3789a403 | 1790 | if ((tp->t_state & (TS_CARR_ON|TS_ISOPEN)) == (TS_CARR_ON|TS_ISOPEN)) { |
232c0273 MT |
1791 | if (c == '\n') |
1792 | (void) ttyoutput('\r', tp); | |
1793 | (void) ttyoutput(c, tp); | |
1794 | ttstart(tp); | |
1795 | splx(s); | |
1796 | return (0); | |
1797 | } | |
1798 | splx(s); | |
1799 | return (-1); | |
52004850 | 1800 | } |
eea83fd3 | 1801 | |
e6745ca3 | 1802 | /* |
d554174a MK |
1803 | * Sleep on chan, returning ERESTART if tty changed |
1804 | * while we napped and returning any errors (e.g. EINTR/ETIMEDOUT) | |
1805 | * reported by tsleep. If the tty is revoked, restarting a pending | |
1806 | * call will redo validation done at the start of the call. | |
e6745ca3 | 1807 | */ |
eea83fd3 MT |
1808 | ttysleep(tp, chan, pri, wmesg, timo) |
1809 | struct tty *tp; | |
1810 | caddr_t chan; | |
1811 | int pri; | |
1812 | char *wmesg; | |
1813 | int timo; | |
1814 | { | |
1815 | int error; | |
1816 | short gen = tp->t_gen; | |
1817 | ||
1818 | if (error = tsleep(chan, pri, wmesg, timo)) | |
1819 | return (error); | |
1820 | if (tp->t_gen != gen) | |
1821 | return (ERESTART); | |
1822 | return (0); | |
1823 | } |