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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 | * |
af9ddf78 | 8 | * @(#)tty.c 7.47 (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 | |
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 | ||
d554174a MK |
182 | #define flushq(qq) { \ |
183 | register struct clist *q = qq; \ | |
184 | if (q->c_cc) \ | |
185 | ndflush(q, q->c_cc); \ | |
186 | } | |
187 | ||
89dc6dfb | 188 | /* |
d554174a MK |
189 | * Flush TTY read and/or write queues, |
190 | * notifying anyone waiting. | |
89dc6dfb | 191 | */ |
88a7a62a | 192 | ttyflush(tp, rw) |
4b72e2f9 | 193 | register struct tty *tp; |
89dc6dfb | 194 | { |
50e2732b BJ |
195 | register s; |
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; |
39697bd8 | 208 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, rw); |
d554174a MK |
209 | flushq(&tp->t_outq); |
210 | wakeup((caddr_t)&tp->t_outq); | |
211 | if (tp->t_wsel) { | |
212 | selwakeup(tp->t_wsel, tp->t_state & TS_WCOLL); | |
213 | tp->t_wsel = 0; | |
214 | tp->t_state &= ~TS_WCOLL; | |
215 | } | |
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 BJ |
257 | { |
258 | ||
09b836aa | 259 | #ifdef DIAGNOSTIC |
becb115c SL |
260 | if (tp == 0) |
261 | panic("ttrstrt"); | |
09b836aa | 262 | #endif |
941944c9 | 263 | tp->t_state &= ~TS_TIMEOUT; |
50e2732b | 264 | ttstart(tp); |
101ba270 BJ |
265 | } |
266 | ||
89dc6dfb BJ |
267 | |
268 | /* | |
d554174a MK |
269 | * Common code for ioctls on tty devices. |
270 | * Called after line-discipline-specific ioctl | |
271 | * has been called to do discipline-specific functions | |
272 | * and/or reject any of these ioctl commands. | |
89dc6dfb | 273 | */ |
49c84d3f | 274 | /*ARGSUSED*/ |
4b72e2f9 SL |
275 | ttioctl(tp, com, data, flag) |
276 | register struct tty *tp; | |
277 | caddr_t data; | |
89dc6dfb | 278 | { |
3789a403 | 279 | register struct proc *p = curproc; /* XXX */ |
89dc6dfb | 280 | extern int nldisp; |
2c6a4e11 | 281 | int soft; |
849cbd39 | 282 | int s, error; |
89dc6dfb | 283 | |
50e2732b BJ |
284 | /* |
285 | * If the ioctl involves modification, | |
4f3a716e | 286 | * hang if in the background. |
50e2732b | 287 | */ |
4b72e2f9 | 288 | switch (com) { |
50e2732b | 289 | |
2c6a4e11 | 290 | case TIOCSETD: |
50e2732b | 291 | case TIOCFLUSH: |
8203fe05 | 292 | case TIOCSTI: |
f9eea644 | 293 | case TIOCSWINSZ: |
2c6a4e11 MT |
294 | case TIOCSETA: |
295 | case TIOCSETAW: | |
296 | case TIOCSETAF: | |
fa4fb7b0 MT |
297 | #ifdef COMPAT_43 |
298 | case TIOCSETP: | |
299 | case TIOCSETN: | |
300 | case TIOCSETC: | |
301 | case TIOCSLTC: | |
302 | case TIOCLBIS: | |
303 | case TIOCLBIC: | |
304 | case TIOCLSET: | |
305 | case OTIOCSETD: | |
306 | #endif | |
3789a403 MK |
307 | while (isbackground(curproc, tp) && |
308 | p->p_pgrp->pg_jobc && (p->p_flag&SPPWAIT) == 0 && | |
309 | (p->p_sigignore & sigmask(SIGTTOU)) == 0 && | |
310 | (p->p_sigmask & sigmask(SIGTTOU)) == 0) { | |
311 | pgsignal(p->p_pgrp, SIGTTOU, 1); | |
eea83fd3 MT |
312 | if (error = ttysleep(tp, (caddr_t)&lbolt, |
313 | TTOPRI | PCATCH, ttybg, 0)) | |
09b836aa | 314 | return (error); |
50e2732b BJ |
315 | } |
316 | break; | |
317 | } | |
318 | ||
becb115c SL |
319 | /* |
320 | * Process the ioctl. | |
321 | */ | |
4b72e2f9 | 322 | switch (com) { |
89dc6dfb | 323 | |
fc6972ae | 324 | /* get discipline number */ |
89dc6dfb | 325 | case TIOCGETD: |
4b72e2f9 | 326 | *(int *)data = tp->t_line; |
89dc6dfb BJ |
327 | break; |
328 | ||
fc6972ae | 329 | /* set line discipline */ |
4b72e2f9 SL |
330 | case TIOCSETD: { |
331 | register int t = *(int *)data; | |
2c6a4e11 | 332 | dev_t dev = tp->t_dev; |
e39f9ea6 | 333 | dev_t dev = tp->t_dev; |
4b72e2f9 | 334 | |
e39f9ea6 | 335 | if ((unsigned)t >= nldisp) |
4a003df3 | 336 | return (ENXIO); |
2eaeef4d MK |
337 | if (t != tp->t_line) { |
338 | s = spltty(); | |
adacc19e | 339 | (*linesw[tp->t_line].l_close)(tp, flag); |
2eaeef4d MK |
340 | error = (*linesw[t].l_open)(dev, tp); |
341 | if (error) { | |
2c6a4e11 | 342 | (void)(*linesw[tp->t_line].l_open)(dev, tp); |
2eaeef4d MK |
343 | splx(s); |
344 | return (error); | |
345 | } | |
346 | tp->t_line = t; | |
4a003df3 | 347 | splx(s); |
4a003df3 | 348 | } |
2c6a4e11 MT |
349 | if (tp->t_trace & TTRACE_STATE) |
350 | ttytrace(com, tp); | |
89dc6dfb | 351 | break; |
4b72e2f9 | 352 | } |
89dc6dfb | 353 | |
fc6972ae | 354 | /* prevent more opens on channel */ |
152c2598 BJ |
355 | case TIOCEXCL: |
356 | tp->t_state |= TS_XCLUDE; | |
357 | break; | |
358 | ||
359 | case TIOCNXCL: | |
360 | tp->t_state &= ~TS_XCLUDE; | |
361 | break; | |
362 | ||
89dc6dfb | 363 | case TIOCHPCL: |
2c6a4e11 | 364 | tp->t_cflag |= HUPCL; |
89dc6dfb BJ |
365 | break; |
366 | ||
7d973a4d | 367 | case TIOCFLUSH: { |
4b72e2f9 SL |
368 | register int flags = *(int *)data; |
369 | ||
370 | if (flags == 0) | |
7d973a4d | 371 | flags = FREAD|FWRITE; |
4b72e2f9 SL |
372 | else |
373 | flags &= FREAD|FWRITE; | |
88a7a62a | 374 | ttyflush(tp, flags); |
89dc6dfb | 375 | break; |
4568c08e | 376 | } |
89dc6dfb | 377 | |
66ad69d6 MT |
378 | case FIOASYNC: |
379 | if (*(int *)data) | |
380 | tp->t_state |= TS_ASYNC; | |
381 | else | |
382 | tp->t_state &= ~TS_ASYNC; | |
383 | break; | |
384 | ||
385 | case FIONBIO: | |
386 | break; /* XXX remove */ | |
387 | ||
fc6972ae | 388 | /* return number of characters immediately available */ |
4b72e2f9 SL |
389 | case FIONREAD: |
390 | *(off_t *)data = ttnread(tp); | |
8062c8a7 | 391 | break; |
8062c8a7 | 392 | |
b968e450 SL |
393 | case TIOCOUTQ: |
394 | *(int *)data = tp->t_outq.c_cc; | |
395 | break; | |
396 | ||
a8d3bf7f | 397 | case TIOCSTOP: |
4f3a716e | 398 | s = spltty(); |
becb115c | 399 | if ((tp->t_state&TS_TTSTOP) == 0) { |
bfcf09ee BJ |
400 | tp->t_state |= TS_TTSTOP; |
401 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
402 | } | |
4b72e2f9 | 403 | splx(s); |
bfcf09ee BJ |
404 | break; |
405 | ||
a8d3bf7f | 406 | case TIOCSTART: |
4f3a716e | 407 | s = spltty(); |
2c6a4e11 | 408 | if ((tp->t_state&TS_TTSTOP) || (tp->t_lflag&FLUSHO)) { |
bfcf09ee | 409 | tp->t_state &= ~TS_TTSTOP; |
2c6a4e11 | 410 | tp->t_lflag &= ~FLUSHO; |
bfcf09ee BJ |
411 | ttstart(tp); |
412 | } | |
4b72e2f9 | 413 | splx(s); |
bfcf09ee BJ |
414 | break; |
415 | ||
8203fe05 SL |
416 | /* |
417 | * Simulate typing of a character at the terminal. | |
418 | */ | |
419 | case TIOCSTI: | |
3789a403 | 420 | if (p->p_ucred->cr_uid && (flag & FREAD) == 0) |
477d62ec | 421 | return (EPERM); |
3789a403 | 422 | if (p->p_ucred->cr_uid && !isctty(p, tp)) |
8203fe05 | 423 | return (EACCES); |
becb115c | 424 | (*linesw[tp->t_line].l_rint)(*(char *)data, tp); |
8203fe05 SL |
425 | break; |
426 | ||
2c6a4e11 MT |
427 | case TIOCGETA: { |
428 | struct termios *t = (struct termios *)data; | |
429 | bcopy(&tp->t_termio, t, sizeof(struct termios)); | |
430 | if (tp->t_trace & TTRACE_STATE) | |
431 | ttytrace(com, tp); | |
432 | break; | |
433 | } | |
434 | ||
2c6a4e11 MT |
435 | if (com == TIOCSETAF || com == TIOCSETAFS) |
436 | ttywflush(tp); | |
437 | else { | |
438 | if (com == TIOCSETAW || com == TIOCSETAWS) | |
439 | ttywait(tp); | |
440 | if ((t->c_lflag&ICANON) != (tp->t_lflag&ICANON)) | |
441 | if (t->c_lflag&ICANON) { | |
442 | tp->t_lflag |= PENDIN; | |
443 | ttwakeup(tp); | |
444 | } | |
445 | else { | |
446 | struct clist tq; | |
447 | ||
448 | catq(&tp->t_rawq, &tp->t_canq); | |
449 | tq = tp->t_rawq; | |
450 | tp->t_rawq = tp->t_canq; | |
451 | tp->t_canq = tq; | |
452 | } | |
88a7a62a | 453 | } |
2c6a4e11 MT |
454 | tp->t_iflag = t->c_iflag; |
455 | tp->t_oflag = t->c_oflag; | |
456 | tp->t_lflag = t->c_lflag; | |
457 | bcopy(t->c_cc, tp->t_cc, sizeof(t->c_cc)); | |
458 | if (!soft) { | |
459 | tp->t_cflag = t->c_cflag; | |
460 | tp->t_ispeed = t->c_ispeed; | |
461 | tp->t_ospeed = t->c_ospeed; | |
88a7a62a | 462 | } |
e39f9ea6 MT |
463 | tp->t_iflag = t->c_iflag; |
464 | tp->t_oflag = t->c_oflag; | |
face72c1 MT |
465 | /* |
466 | * Make the EXTPROC bit read only. | |
467 | */ | |
468 | if (tp->t_lflag&EXTPROC) | |
469 | t->c_lflag |= EXTPROC; | |
470 | else | |
471 | t->c_lflag &= ~EXTPROC; | |
e39f9ea6 MT |
472 | tp->t_lflag = t->c_lflag; |
473 | bcopy(t->c_cc, tp->t_cc, sizeof(t->c_cc)); | |
88a7a62a | 474 | splx(s); |
2c6a4e11 MT |
475 | if (tp->t_trace & TTRACE_STATE) |
476 | ttytrace(com, tp); | |
88a7a62a SL |
477 | break; |
478 | } | |
479 | ||
4f3a716e | 480 | /* |
e39f9ea6 | 481 | * Set terminal process group. |
4f3a716e | 482 | */ |
245aeefa | 483 | case TIOCSPGRP: { |
e39f9ea6 MT |
484 | register struct pgrp *pgrp = pgfind(*(int *)data); |
485 | ||
232c0273 MT |
486 | if (!isctty(p, tp)) |
487 | return (ENOTTY); | |
fa4fb7b0 | 488 | else if (pgrp == NULL || pgrp->pg_session != p->p_session) |
232c0273 MT |
489 | return (EPERM); |
490 | tp->t_pgrp = pgrp; | |
88a7a62a | 491 | break; |
245aeefa | 492 | } |
88a7a62a SL |
493 | |
494 | case TIOCGPGRP: | |
3789a403 | 495 | if (!isctty(p, tp)) |
232c0273 | 496 | return (ENOTTY); |
500e26a6 | 497 | *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; |
88a7a62a SL |
498 | break; |
499 | ||
f9eea644 | 500 | case TIOCSWINSZ: |
245aeefa JB |
501 | if (bcmp((caddr_t)&tp->t_winsize, data, |
502 | sizeof (struct winsize))) { | |
f9eea644 | 503 | tp->t_winsize = *(struct winsize *)data; |
face72c1 | 504 | pgsignal(tp->t_pgrp, SIGWINCH, 1); |
f9eea644 JB |
505 | } |
506 | break; | |
507 | ||
508 | case TIOCGWINSZ: | |
509 | *(struct winsize *)data = tp->t_winsize; | |
510 | break; | |
511 | ||
adf4bc89 MK |
512 | case TIOCCONS: |
513 | if (*(int *)data) { | |
c0d5efb1 KM |
514 | if (constty && constty != tp && |
515 | (constty->t_state & (TS_CARR_ON|TS_ISOPEN)) == | |
516 | (TS_CARR_ON|TS_ISOPEN)) | |
adf4bc89 MK |
517 | return (EBUSY); |
518 | #ifndef UCONSOLE | |
3789a403 | 519 | if (error = suser(p->p_ucred, &p->p_acflag)) |
849cbd39 | 520 | return (error); |
adf4bc89 MK |
521 | #endif |
522 | constty = tp; | |
523 | } else if (tp == constty) | |
1eebc1a7 | 524 | constty = NULL; |
adf4bc89 MK |
525 | break; |
526 | ||
6cec2da2 MK |
527 | case TIOCDRAIN: |
528 | if (error = ttywait(tp)) | |
529 | return (error); | |
530 | break; | |
531 | ||
2c6a4e11 MT |
532 | /* allow old ioctls for now */ |
533 | case TIOCGETP: | |
534 | case TIOCSETP: | |
535 | case TIOCSETN: | |
536 | case TIOCGETC: | |
537 | case TIOCSETC: | |
538 | case TIOCSLTC: | |
539 | case TIOCGLTC: | |
540 | case TIOCLBIS: | |
541 | case TIOCLBIC: | |
542 | case TIOCLSET: | |
543 | case TIOCLGET: | |
544 | return(ottioctl(tp, com, data, flag)); | |
545 | ||
89dc6dfb | 546 | default: |
3789a403 MK |
547 | #ifdef COMPAT_43 |
548 | return (ttcompat(tp, com, data, flag)); | |
549 | #else | |
fc6972ae | 550 | return (-1); |
3789a403 | 551 | #endif |
89dc6dfb | 552 | } |
fc6972ae | 553 | return (0); |
89dc6dfb | 554 | } |
e1d74936 | 555 | |
2c6a4e11 MT |
556 | /* |
557 | * DEBUG - to be removed | |
558 | */ | |
559 | ttytrace(ioc, tp) | |
560 | struct tty *tp; | |
561 | { | |
562 | register u_char *cc = tp->t_cc; | |
563 | char comm[MAXCOMLEN+1]; | |
564 | static int seq = 0; | |
565 | ||
566 | bcopy(u.u_comm, comm, MAXCOMLEN+1); | |
567 | comm[MAXCOMLEN] = '\0'; | |
568 | ||
569 | /* trace changes to line disciplines */ | |
570 | if (ioc == TIOCSETD) { | |
571 | log(LOG_LOCAL4|LOG_DEBUG, "%s:%x:%x:%x:%x\n", | |
572 | comm, ioc, u.u_procp->p_pid, tp->t_dev, tp->t_line); | |
573 | return; | |
574 | } | |
575 | ||
576 | /* | |
577 | * format for the trace record is: | |
578 | * | |
579 | * u_comm:ioctl:pid:dev_t:ldisc:iflag:oflag:lflag:cflag:ispeed: | |
580 | * ospeed:cc's...:seq | |
581 | * | |
582 | * u_comm is a string and all other values are hex. "cc's..." | |
583 | * stands for control chars 0 through NCC-1. seq is a sequence # | |
584 | * to force syslogd to log every entry (rather than hold them to | |
585 | * print "last message repeated...". | |
586 | */ | |
587 | 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", | |
588 | comm, ioc, u.u_procp->p_pid, tp->t_dev, tp->t_line, | |
589 | tp->t_iflag, tp->t_oflag, tp->t_lflag, tp->t_cflag, | |
590 | tp->t_ispeed, tp->t_ospeed, cc[0], cc[1], cc[2], cc[3], | |
591 | cc[4], cc[5], cc[6], cc[7], cc[8], cc[9], cc[10], cc[11], | |
592 | cc[12], cc[13], cc[14], cc[15], cc[16], cc[17], cc[18], | |
593 | cc[19], seq++); | |
594 | } | |
595 | ||
e1d74936 BJ |
596 | ttnread(tp) |
597 | struct tty *tp; | |
598 | { | |
599 | int nread = 0; | |
600 | ||
2c6a4e11 | 601 | if (tp->t_lflag & PENDIN) |
e1d74936 BJ |
602 | ttypend(tp); |
603 | nread = tp->t_canq.c_cc; | |
2c6a4e11 | 604 | if (tp->t_lflag & ICANON == 0) |
e1d74936 BJ |
605 | nread += tp->t_rawq.c_cc; |
606 | return (nread); | |
607 | } | |
608 | ||
941944c9 | 609 | ttselect(dev, rw) |
e1d74936 | 610 | dev_t dev; |
941944c9 | 611 | int rw; |
e1d74936 BJ |
612 | { |
613 | register struct tty *tp = &cdevsw[major(dev)].d_ttys[minor(dev)]; | |
614 | int nread; | |
4f3a716e | 615 | int s = spltty(); |
e1d74936 | 616 | |
941944c9 | 617 | switch (rw) { |
e1d74936 BJ |
618 | |
619 | case FREAD: | |
620 | nread = ttnread(tp); | |
66ad69d6 | 621 | if (nread > 0 || |
09b836aa | 622 | ((tp->t_cflag&CLOCAL) == 0 && (tp->t_state&TS_CARR_ON) == 0)) |
941944c9 | 623 | goto win; |
89b8a44c | 624 | if (tp->t_rsel && tp->t_rsel->p_wchan == (caddr_t)&selwait) |
941944c9 | 625 | tp->t_state |= TS_RCOLL; |
e1d74936 | 626 | else |
3789a403 | 627 | tp->t_rsel = curproc; |
941944c9 | 628 | break; |
e1d74936 | 629 | |
941944c9 | 630 | case FWRITE: |
e39f9ea6 | 631 | if (tp->t_outq.c_cc <= tp->t_lowat) |
941944c9 | 632 | goto win; |
941944c9 BJ |
633 | if (tp->t_wsel && tp->t_wsel->p_wchan == (caddr_t)&selwait) |
634 | tp->t_state |= TS_WCOLL; | |
635 | else | |
3789a403 | 636 | tp->t_wsel = curproc; |
941944c9 | 637 | break; |
e1d74936 | 638 | } |
941944c9 BJ |
639 | splx(s); |
640 | return (0); | |
641 | win: | |
642 | splx(s); | |
643 | return (1); | |
e1d74936 | 644 | } |
8bba2b8f | 645 | |
4147b3f6 | 646 | /* |
d554174a | 647 | * Initial open of tty, or (re)entry to standard tty line discipline. |
4147b3f6 BJ |
648 | */ |
649 | ttyopen(dev, tp) | |
4b72e2f9 SL |
650 | dev_t dev; |
651 | register struct tty *tp; | |
4147b3f6 | 652 | { |
4147b3f6 | 653 | |
4147b3f6 | 654 | tp->t_dev = dev; |
e39f9ea6 | 655 | |
4147b3f6 | 656 | tp->t_state &= ~TS_WOPEN; |
4f3a716e MK |
657 | if ((tp->t_state & TS_ISOPEN) == 0) { |
658 | tp->t_state |= TS_ISOPEN; | |
f9eea644 | 659 | bzero((caddr_t)&tp->t_winsize, sizeof(tp->t_winsize)); |
2c6a4e11 MT |
660 | /* |
661 | * CHANGE: used to do a ttywflush() if it was the | |
662 | * old (old) line discipline. | |
663 | */ | |
4f3a716e | 664 | } |
fc6972ae | 665 | return (0); |
4147b3f6 BJ |
666 | } |
667 | ||
605d7712 MK |
668 | /* |
669 | * "close" a line discipline | |
670 | */ | |
adacc19e MT |
671 | ttylclose(tp, flag) |
672 | struct tty *tp; | |
673 | int flag; | |
605d7712 MK |
674 | { |
675 | ||
adacc19e MT |
676 | if (flag&IO_NDELAY) |
677 | ttyflush(tp, FREAD|FWRITE); | |
678 | else | |
679 | ttywflush(tp); | |
605d7712 MK |
680 | } |
681 | ||
4147b3f6 | 682 | /* |
d554174a MK |
683 | * Handle close() on a tty line: flush and set to initial state, |
684 | * bumping generation number so that pending read/write calls | |
685 | * can detect recycling of the tty. | |
4147b3f6 BJ |
686 | */ |
687 | ttyclose(tp) | |
4b72e2f9 | 688 | register struct tty *tp; |
4147b3f6 | 689 | { |
adf4bc89 MK |
690 | if (constty == tp) |
691 | constty = NULL; | |
605d7712 | 692 | ttyflush(tp, FREAD|FWRITE); |
232c0273 MT |
693 | tp->t_session = NULL; |
694 | tp->t_pgrp = NULL; | |
4147b3f6 | 695 | tp->t_state = 0; |
eea83fd3 | 696 | tp->t_gen++; |
09b836aa | 697 | return (0); |
4147b3f6 BJ |
698 | } |
699 | ||
605d7712 MK |
700 | /* |
701 | * Handle modem control transition on a tty. | |
702 | * Flag indicates new state of carrier. | |
703 | * Returns 0 if the line should be turned off, otherwise 1. | |
704 | */ | |
705 | ttymodem(tp, flag) | |
706 | register struct tty *tp; | |
707 | { | |
708 | ||
2c6a4e11 | 709 | if ((tp->t_state&TS_WOPEN) == 0 && (tp->t_lflag & MDMBUF)) { |
605d7712 MK |
710 | /* |
711 | * MDMBUF: do flow control according to carrier flag | |
712 | */ | |
713 | if (flag) { | |
714 | tp->t_state &= ~TS_TTSTOP; | |
715 | ttstart(tp); | |
716 | } else if ((tp->t_state&TS_TTSTOP) == 0) { | |
717 | tp->t_state |= TS_TTSTOP; | |
718 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
719 | } | |
720 | } else if (flag == 0) { | |
721 | /* | |
722 | * Lost carrier. | |
723 | */ | |
724 | tp->t_state &= ~TS_CARR_ON; | |
992909a0 MT |
725 | if (tp->t_state&TS_ISOPEN && (tp->t_cflag&CLOCAL) == 0) { |
726 | if (tp->t_session && tp->t_session->s_leader) | |
727 | psignal(tp->t_session->s_leader, SIGHUP); | |
728 | ttyflush(tp, FREAD|FWRITE); | |
729 | return (0); | |
605d7712 MK |
730 | } |
731 | } else { | |
732 | /* | |
733 | * Carrier now on. | |
734 | */ | |
735 | tp->t_state |= TS_CARR_ON; | |
66ad69d6 | 736 | ttwakeup(tp); |
605d7712 MK |
737 | } |
738 | return (1); | |
739 | } | |
740 | ||
e3f2038d MK |
741 | /* |
742 | * Default modem control routine (for other line disciplines). | |
743 | * Return argument flag, to turn off device on carrier drop. | |
744 | */ | |
2f54b5e8 MK |
745 | nullmodem(tp, flag) |
746 | register struct tty *tp; | |
e3f2038d MK |
747 | int flag; |
748 | { | |
749 | ||
750 | if (flag) | |
751 | tp->t_state |= TS_CARR_ON; | |
52004850 | 752 | else { |
e3f2038d | 753 | tp->t_state &= ~TS_CARR_ON; |
992909a0 MT |
754 | if ((tp->t_cflag&CLOCAL) == 0) { |
755 | if (tp->t_session && tp->t_session->s_leader) | |
756 | psignal(tp->t_session->s_leader, SIGHUP); | |
757 | return (0); | |
758 | } | |
52004850 | 759 | } |
992909a0 | 760 | return (1); |
e3f2038d MK |
761 | } |
762 | ||
4147b3f6 BJ |
763 | /* |
764 | * reinput pending characters after state switch | |
4f3a716e | 765 | * call at spltty(). |
4147b3f6 BJ |
766 | */ |
767 | ttypend(tp) | |
4b72e2f9 | 768 | register struct tty *tp; |
4147b3f6 BJ |
769 | { |
770 | struct clist tq; | |
771 | register c; | |
772 | ||
2c6a4e11 | 773 | tp->t_lflag &= ~PENDIN; |
becb115c | 774 | tp->t_state |= TS_TYPEN; |
4147b3f6 BJ |
775 | tq = tp->t_rawq; |
776 | tp->t_rawq.c_cc = 0; | |
777 | tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0; | |
778 | while ((c = getc(&tq)) >= 0) | |
779 | ttyinput(c, tp); | |
becb115c | 780 | tp->t_state &= ~TS_TYPEN; |
4147b3f6 BJ |
781 | } |
782 | ||
783 | /* | |
d554174a | 784 | * Process input of a single character received on a tty. |
4147b3f6 BJ |
785 | */ |
786 | ttyinput(c, tp) | |
4b72e2f9 SL |
787 | register c; |
788 | register struct tty *tp; | |
4147b3f6 | 789 | { |
2c6a4e11 MT |
790 | register int iflag = tp->t_iflag; |
791 | register int lflag = tp->t_lflag; | |
792 | register u_char *cc = tp->t_cc; | |
793 | int i, err; | |
4147b3f6 | 794 | |
becb115c SL |
795 | /* |
796 | * If input is pending take it first. | |
797 | */ | |
2c6a4e11 | 798 | if (lflag&PENDIN) |
4147b3f6 | 799 | ttypend(tp); |
e39f9ea6 MT |
800 | /* |
801 | * Gather stats. | |
802 | */ | |
2c6a4e11 | 803 | |
4147b3f6 | 804 | tk_nin++; |
e39f9ea6 MT |
805 | if (lflag&ICANON) { |
806 | tk_cancc++; | |
807 | tp->t_cancc++; | |
808 | } else { | |
809 | tk_rawcc++; | |
810 | tp->t_rawcc++; | |
811 | } | |
becb115c | 812 | /* |
2c6a4e11 | 813 | * Handle exceptional conditions (break, parity, framing). |
becb115c | 814 | */ |
2c6a4e11 MT |
815 | if (err = (c&TTY_ERRORMASK)) { |
816 | c &= TTY_CHARMASK; | |
817 | if (err&TTY_FE && !c) { /* break */ | |
818 | if (iflag&IGNBRK) | |
819 | goto endcase; | |
820 | else if (iflag&BRKINT && lflag&ISIG && | |
821 | (cc[VINTR] != POSIX_V_DISABLE)) | |
822 | c = cc[VINTR]; | |
823 | else | |
824 | c = 0; | |
825 | } else if ((err&TTY_PE && iflag&INPCK) || err&TTY_FE) { | |
826 | if (iflag&IGNPAR) | |
827 | goto endcase; | |
828 | else if (iflag&PARMRK) { | |
829 | ttyinput(0377, tp); | |
830 | ttyinput(0, tp); | |
831 | } else | |
832 | c = 0; | |
4147b3f6 | 833 | } |
becb115c | 834 | } |
2c6a4e11 MT |
835 | dprintf("<%o>\n", c); |
836 | ||
837 | /* | |
838 | * In tandem mode, check high water mark. | |
839 | */ | |
840 | if (iflag&IXOFF) | |
841 | ttyblock(tp); | |
842 | ||
becb115c | 843 | /* |
e39f9ea6 | 844 | * In tandem mode, check high water mark. |
becb115c | 845 | */ |
2c6a4e11 | 846 | if ((tp->t_state&TS_TYPEN) == 0 && (iflag&ISTRIP)) |
d554174a | 847 | c &= ~0x80; |
2c6a4e11 MT |
848 | |
849 | /* | |
850 | * Extensions to POSIX input modes which aren't controlled | |
851 | * by ICANON, ISIG, or IXON. | |
852 | */ | |
853 | if (iflag&IEXTEN) { | |
854 | if (CCEQ(cc[VLNEXT],c) && (iflag&ISTRIP)) { | |
855 | if (lflag&ECHO) | |
856 | ttyout("^\b", tp); /*XXX - presumes too much */ | |
becb115c | 857 | } |
e6745ca3 MT |
858 | /* |
859 | * Signals. | |
860 | */ | |
861 | if (lflag&ISIG) { | |
862 | if (CCEQ(cc[VINTR], c) || CCEQ(cc[VQUIT], c)) { | |
863 | if ((lflag&NOFLSH) == 0) | |
864 | ttyflush(tp, FREAD|FWRITE); | |
4147b3f6 | 865 | ttyecho(c, tp); |
2c6a4e11 | 866 | tp->t_lflag |= FLUSHO; |
4147b3f6 | 867 | } |
e6745ca3 MT |
868 | if (CCEQ(cc[VSUSP], c)) { |
869 | if ((lflag&NOFLSH) == 0) | |
870 | ttyflush(tp, FREAD); | |
871 | ttyecho(c, tp); | |
872 | pgsignal(tp->t_pgrp, SIGTSTP, 1); | |
873 | goto endcase; | |
874 | } | |
becb115c | 875 | } |
2c6a4e11 MT |
876 | if (iflag&IXON) { |
877 | if (CCEQ(cc[VSTOP],c)) { | |
878 | if ((tp->t_state&TS_TTSTOP) == 0) { | |
879 | tp->t_state |= TS_TTSTOP; | |
880 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
881 | return; | |
882 | } | |
883 | if (!CCEQ(cc[VSTART], c)) | |
884 | return; | |
885 | /* | |
886 | * if VSTART == VSTOP we toggle | |
887 | */ | |
888 | goto endcase; | |
becb115c | 889 | } |
2c6a4e11 MT |
890 | if (CCEQ(cc[VSTART], c)) |
891 | goto restartoutput; | |
becb115c | 892 | } |
2c6a4e11 MT |
893 | c = unputc(&tp->t_rawq); |
894 | } while (c != ' ' && c != '\t'); | |
895 | (void) putc(c, &tp->t_rawq); | |
896 | goto endcase; | |
897 | } | |
898 | /* | |
899 | * reprint line (^R) | |
900 | */ | |
901 | if (CCEQ(cc[VREPRINT], c)) { | |
902 | ttyretype(tp); | |
903 | goto endcase; | |
becb115c | 904 | } |
becb115c SL |
905 | /* |
906 | * Check for input buffer overflow | |
907 | */ | |
3789a403 | 908 | if (tp->t_rawq.c_cc + tp->t_canq.c_cc >= TTYHOG) { |
2c6a4e11 MT |
909 | if (iflag&IMAXBEL) { |
910 | if (tp->t_outq.c_cc < TTHIWAT(tp)) | |
911 | (void) ttyoutput(CTRL('g'), tp); | |
912 | } else | |
913 | ttyflush(tp, FREAD | FWRITE); | |
becb115c | 914 | goto endcase; |
7c9f96c0 | 915 | } |
becb115c SL |
916 | /* |
917 | * Put data char in q for user and | |
918 | * wakeup on seeing a line delimiter. | |
919 | */ | |
920 | if (putc(c, &tp->t_rawq) >= 0) { | |
3789a403 MK |
921 | if ((lflag&ICANON) == 0) { |
922 | ttwakeup(tp); | |
923 | ttyecho(c, tp); | |
924 | goto endcase; | |
925 | } | |
2c6a4e11 | 926 | if (ttbreakc(c)) { |
becb115c SL |
927 | tp->t_rocount = 0; |
928 | catq(&tp->t_rawq, &tp->t_canq); | |
4147b3f6 | 929 | ttwakeup(tp); |
becb115c SL |
930 | } else if (tp->t_rocount++ == 0) |
931 | tp->t_rocol = tp->t_col; | |
2c6a4e11 MT |
932 | if (CCEQ(cc[VQUOTE], c) && (iflag&ISTRIP)) |
933 | tp->t_state |= TS_QUOT; /* '\' escape */ | |
becb115c | 934 | if (tp->t_state&TS_ERASE) { |
e39f9ea6 MT |
935 | /* |
936 | * end of prterase \.../ | |
937 | */ | |
2c6a4e11 MT |
938 | /* |
939 | * end of prterase \.../ | |
940 | */ | |
becb115c SL |
941 | tp->t_state &= ~TS_ERASE; |
942 | (void) ttyoutput('/', tp); | |
943 | } | |
944 | i = tp->t_col; | |
4147b3f6 | 945 | ttyecho(c, tp); |
2c6a4e11 MT |
946 | if (CCEQ(cc[VEOF], c) && lflag&ECHO) { |
947 | /* | |
948 | * Place the cursor over the '^' of the ^D. | |
949 | */ | |
becb115c SL |
950 | i = MIN(2, tp->t_col - i); |
951 | while (i > 0) { | |
952 | (void) ttyoutput('\b', tp); | |
953 | i--; | |
954 | } | |
955 | } | |
4147b3f6 | 956 | } |
becb115c SL |
957 | endcase: |
958 | /* | |
2c6a4e11 | 959 | * IXANY means allow any character to restart output. |
becb115c | 960 | */ |
2c6a4e11 MT |
961 | if (tp->t_state&TS_TTSTOP && (iflag&IXANY == 0) |
962 | && cc[VSTART] != cc[VSTOP]) | |
4147b3f6 | 963 | return; |
2c6a4e11 | 964 | |
becb115c | 965 | restartoutput: |
4147b3f6 | 966 | tp->t_state &= ~TS_TTSTOP; |
2c6a4e11 | 967 | tp->t_lflag &= ~FLUSHO; |
becb115c | 968 | startoutput: |
4147b3f6 BJ |
969 | ttstart(tp); |
970 | } | |
971 | ||
972 | /* | |
d554174a MK |
973 | * Output a single character on a tty, doing output processing |
974 | * as needed (expanding tabs, newline processing, etc.). | |
975 | * Returns < 0 if putc succeeds, otherwise returns char to resend. | |
4147b3f6 BJ |
976 | * Must be recursive. |
977 | */ | |
978 | ttyoutput(c, tp) | |
979 | register c; | |
980 | register struct tty *tp; | |
981 | { | |
d554174a | 982 | register int col; |
2c6a4e11 MT |
983 | if (!(tp->t_oflag&OPOST)) { |
984 | if (tp->t_lflag&FLUSHO) | |
4147b3f6 BJ |
985 | return (-1); |
986 | if (putc(c, &tp->t_outq)) | |
4b72e2f9 | 987 | return (c); |
4147b3f6 | 988 | tk_nout++; |
e39f9ea6 | 989 | tp->t_outcc++; |
4147b3f6 BJ |
990 | return (-1); |
991 | } | |
2c6a4e11 | 992 | c &= 0377; |
4147b3f6 | 993 | /* |
d554174a | 994 | * Do tab expansion if OXTABS is set. |
face72c1 MT |
995 | * Special case if we have external processing, we don't |
996 | * do the tab expansion because we'll probably get it | |
997 | * wrong. If tab expansion needs to be done, let it | |
998 | * happen externally. | |
4147b3f6 | 999 | */ |
2c6a4e11 | 1000 | if (c == '\t' && tp->t_oflag&OXTABS ) { |
4147b3f6 BJ |
1001 | register int s; |
1002 | ||
1003 | c = 8 - (tp->t_col&7); | |
2c6a4e11 | 1004 | if ((tp->t_lflag&FLUSHO) == 0) { |
4f3a716e | 1005 | s = spltty(); /* don't interrupt tabs */ |
4147b3f6 BJ |
1006 | c -= b_to_q(" ", c, &tp->t_outq); |
1007 | tk_nout += c; | |
e39f9ea6 | 1008 | tp->t_outcc += c; |
4147b3f6 BJ |
1009 | splx(s); |
1010 | } | |
1011 | tp->t_col += c; | |
1012 | return (c ? -1 : '\t'); | |
1013 | } | |
e39f9ea6 | 1014 | if (c == CEOT && oflag&ONOEOT) |
3789a403 | 1015 | return (-1); |
4147b3f6 | 1016 | tk_nout++; |
e39f9ea6 | 1017 | tp->t_outcc++; |
2c6a4e11 | 1018 | #ifdef notdef |
4147b3f6 | 1019 | /* |
d554174a MK |
1020 | * Newline translation: if ONLCR is set, |
1021 | * translate newline into "\r\n". | |
4147b3f6 | 1022 | */ |
2c6a4e11 | 1023 | #endif |
e39f9ea6 MT |
1024 | if ((tp->t_lflag&FLUSHO) == 0 && putc(c, &tp->t_outq)) |
1025 | return (c); | |
2c6a4e11 | 1026 | if ((tp->t_lflag&FLUSHO) == 0 && putc(c, &tp->t_outq)) |
4147b3f6 | 1027 | return (c); |
3789a403 | 1028 | |
d554174a MK |
1029 | col = tp->t_col; |
1030 | switch (CCLASS(c)) { | |
4147b3f6 BJ |
1031 | |
1032 | case ORDINARY: | |
d554174a | 1033 | col++; |
4147b3f6 BJ |
1034 | |
1035 | case CONTROL: | |
1036 | break; | |
1037 | ||
1038 | case BACKSPACE: | |
d554174a MK |
1039 | if (col > 0) |
1040 | col--; | |
4147b3f6 BJ |
1041 | break; |
1042 | ||
1043 | case NEWLINE: | |
d554174a | 1044 | col = 0; |
4147b3f6 BJ |
1045 | break; |
1046 | ||
1047 | case TAB: | |
d554174a | 1048 | col = (col + 8) &~ 0x7; |
4147b3f6 BJ |
1049 | break; |
1050 | ||
4147b3f6 | 1051 | case RETURN: |
d554174a | 1052 | col = 0; |
4147b3f6 | 1053 | } |
d554174a | 1054 | tp->t_col = col; |
4147b3f6 BJ |
1055 | return (-1); |
1056 | } | |
1057 | ||
1058 | /* | |
d554174a | 1059 | * Process a read call on a tty device. |
4147b3f6 | 1060 | */ |
66ad69d6 | 1061 | ttread(tp, uio, flag) |
4b72e2f9 | 1062 | register struct tty *tp; |
d6d7360b | 1063 | struct uio *uio; |
4147b3f6 BJ |
1064 | { |
1065 | register struct clist *qp; | |
2c6a4e11 MT |
1066 | register int c, t_flags; |
1067 | register long lflag = tp->t_lflag; | |
1068 | register long iflag = tp->t_iflag; | |
1069 | register u_char *cc = tp->t_cc; | |
875a1e2c | 1070 | int s, first, error = 0; |
4147b3f6 | 1071 | |
2c6a4e11 | 1072 | |
4147b3f6 | 1073 | loop: |
0f12c7be | 1074 | lflag = tp->t_lflag; |
66ad69d6 | 1075 | s = spltty(); |
becb115c | 1076 | /* |
66ad69d6 | 1077 | * take pending input first |
becb115c | 1078 | */ |
2c6a4e11 | 1079 | if (tp->t_lflag&PENDIN) |
4147b3f6 | 1080 | ttypend(tp); |
875a1e2c | 1081 | splx(s); |
09b836aa | 1082 | |
becb115c SL |
1083 | /* |
1084 | * Hang process if it's in the background. | |
1085 | */ | |
3789a403 MK |
1086 | if (isbackground(p, tp)) { |
1087 | if ((p->p_sigignore & sigmask(SIGTTIN)) || | |
1088 | (p->p_sigmask & sigmask(SIGTTIN)) || | |
1089 | p->p_flag&SPPWAIT || p->p_pgrp->pg_jobc == 0) | |
840510a3 | 1090 | return (EIO); |
3789a403 | 1091 | pgsignal(p->p_pgrp, SIGTTIN, 1); |
eea83fd3 MT |
1092 | if (error = ttysleep(tp, (caddr_t)&lbolt, TTIPRI | PCATCH, |
1093 | ttybg, 0)) | |
09b836aa | 1094 | return (error); |
58786a81 | 1095 | goto loop; |
4147b3f6 | 1096 | } |
09b836aa | 1097 | |
becb115c | 1098 | /* |
2c6a4e11 MT |
1099 | * If canonical, use the canonical queue, |
1100 | * else use the raw queue. | |
becb115c | 1101 | */ |
2c6a4e11 | 1102 | qp = lflag&ICANON ? &tp->t_canq : &tp->t_rawq; |
09b836aa | 1103 | |
becb115c | 1104 | /* |
09b836aa MK |
1105 | * If there is no input, sleep on rawq |
1106 | * awaiting hardware receipt and notification. | |
1107 | * If we have data, we don't need to check for carrier. | |
becb115c | 1108 | */ |
4f3a716e | 1109 | s = spltty(); |
becb115c | 1110 | if (qp->c_cc <= 0) { |
09b836aa MK |
1111 | int carrier; |
1112 | ||
1113 | carrier = (tp->t_state&TS_CARR_ON) || (tp->t_cflag&CLOCAL); | |
1114 | if (!carrier && tp->t_state&TS_ISOPEN) { | |
875a1e2c | 1115 | splx(s); |
09b836aa | 1116 | return (0); /* EOF */ |
4147b3f6 | 1117 | } |
c4ec2128 | 1118 | if (flag & IO_NDELAY) { |
66ad69d6 MT |
1119 | splx(s); |
1120 | return (EWOULDBLOCK); | |
1121 | } | |
eea83fd3 | 1122 | error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH, |
09b836aa | 1123 | carrier ? ttyin : ttopen, 0); |
875a1e2c | 1124 | splx(s); |
eea83fd3 | 1125 | if (error) |
09b836aa | 1126 | return (error); |
becb115c SL |
1127 | goto loop; |
1128 | } | |
875a1e2c | 1129 | splx(s); |
09b836aa | 1130 | |
becb115c | 1131 | /* |
2c6a4e11 | 1132 | * Input present, check for input mapping and processing. |
becb115c SL |
1133 | */ |
1134 | first = 1; | |
1135 | while ((c = getc(qp)) >= 0) { | |
becb115c | 1136 | /* |
2c6a4e11 | 1137 | * delayed suspend (^Y) |
becb115c | 1138 | */ |
2c6a4e11 | 1139 | if (CCEQ(cc[VDSUSP], c) && lflag&ISIG) { |
face72c1 | 1140 | pgsignal(tp->t_pgrp, SIGTSTP, 1); |
becb115c | 1141 | if (first) { |
eea83fd3 MT |
1142 | if (error = ttysleep(tp, (caddr_t)&lbolt, |
1143 | TTIPRI | PCATCH, ttybg, 0)) | |
09b836aa | 1144 | break; |
becb115c SL |
1145 | goto loop; |
1146 | } | |
1147 | break; | |
4147b3f6 | 1148 | } |
becb115c | 1149 | /* |
2c6a4e11 | 1150 | * Interpret EOF only in canonical mode. |
becb115c | 1151 | */ |
2c6a4e11 | 1152 | if (CCEQ(cc[VEOF], c) && lflag&ICANON) |
becb115c SL |
1153 | break; |
1154 | /* | |
1155 | * Give user character. | |
1156 | */ | |
2c6a4e11 | 1157 | error = ureadc(iflag&ISTRIP ? c & 0177 : c , uio); |
becb115c SL |
1158 | if (error) |
1159 | break; | |
9ec65acb | 1160 | if (uio->uio_resid == 0) |
becb115c SL |
1161 | break; |
1162 | /* | |
2c6a4e11 | 1163 | * In canonical mode check for a "break character" |
becb115c SL |
1164 | * marking the end of a "line of input". |
1165 | */ | |
2c6a4e11 | 1166 | if (lflag&ICANON && ttbreakc(c)) { |
becb115c | 1167 | break; |
2c6a4e11 | 1168 | } |
becb115c | 1169 | first = 0; |
4147b3f6 | 1170 | } |
becb115c SL |
1171 | /* |
1172 | * Look to unblock output now that (presumably) | |
1173 | * the input queue has gone down. | |
1174 | */ | |
2c6a4e11 MT |
1175 | if (tp->t_state&TS_TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) { |
1176 | if (cc[VSTART] != POSIX_V_DISABLE | |
1177 | && putc(cc[VSTART], &tp->t_outq) == 0) { | |
4147b3f6 BJ |
1178 | tp->t_state &= ~TS_TBLOCK; |
1179 | ttstart(tp); | |
1180 | } | |
2c6a4e11 | 1181 | } |
e39f9ea6 | 1182 | } |
840510a3 | 1183 | return (error); |
4147b3f6 BJ |
1184 | } |
1185 | ||
605d7712 MK |
1186 | /* |
1187 | * Check the output queue on tp for space for a kernel message | |
1188 | * (from uprintf/tprintf). Allow some space over the normal | |
1189 | * hiwater mark so we don't lose messages due to normal flow | |
1190 | * control, but don't let the tty run amok. | |
ca9b16e5 MK |
1191 | * Sleeps here are not interruptible, but we return prematurely |
1192 | * if new signals come in. | |
605d7712 MK |
1193 | */ |
1194 | ttycheckoutq(tp, wait) | |
1195 | register struct tty *tp; | |
1196 | int wait; | |
1197 | { | |
ca9b16e5 | 1198 | int hiwat, s, oldsig; |
6cec2da2 | 1199 | extern int wakeup(); |
605d7712 | 1200 | |
e39f9ea6 | 1201 | hiwat = tp->t_hiwat; |
605d7712 | 1202 | s = spltty(); |
2c30a53a MK |
1203 | if (wait) |
1204 | oldsig = curproc->p_sig; | |
605d7712 | 1205 | if (tp->t_outq.c_cc > hiwat + 200) |
fb1db32c MK |
1206 | while (tp->t_outq.c_cc > hiwat) { |
1207 | ttstart(tp); | |
3789a403 | 1208 | if (wait == 0 || curproc->p_sig != oldsig) { |
fb1db32c MK |
1209 | splx(s); |
1210 | return (0); | |
1211 | } | |
ca9b16e5 | 1212 | timeout(wakeup, (caddr_t)&tp->t_outq, hz); |
fb1db32c | 1213 | tp->t_state |= TS_ASLEEP; |
ca9b16e5 | 1214 | sleep((caddr_t)&tp->t_outq, PZERO - 1); |
605d7712 | 1215 | } |
605d7712 MK |
1216 | splx(s); |
1217 | return (1); | |
1218 | } | |
1219 | ||
4147b3f6 | 1220 | /* |
d554174a | 1221 | * Process a write call on a tty device. |
4147b3f6 | 1222 | */ |
66ad69d6 | 1223 | ttwrite(tp, uio, flag) |
4b72e2f9 | 1224 | register struct tty *tp; |
becb115c | 1225 | register struct uio *uio; |
4147b3f6 | 1226 | { |
4147b3f6 | 1227 | register char *cp; |
09b836aa | 1228 | register int cc = 0, ce; |
3789a403 | 1229 | register struct proc *p = curproc; |
becb115c | 1230 | int i, hiwat, cnt, error, s; |
4147b3f6 | 1231 | char obuf[OBUFSIZ]; |
4147b3f6 | 1232 | |
e39f9ea6 | 1233 | hiwat = tp->t_hiwat; |
becb115c SL |
1234 | cnt = uio->uio_resid; |
1235 | error = 0; | |
4147b3f6 | 1236 | loop: |
66ad69d6 | 1237 | s = spltty(); |
09b836aa | 1238 | if ((tp->t_state&TS_CARR_ON) == 0 && (tp->t_cflag&CLOCAL) == 0) { |
66ad69d6 MT |
1239 | if (tp->t_state&TS_ISOPEN) { |
1240 | splx(s); | |
1241 | return (EIO); | |
c4ec2128 | 1242 | } else if (flag & IO_NDELAY) { |
66ad69d6 | 1243 | splx(s); |
09b836aa MK |
1244 | error = EWOULDBLOCK; |
1245 | goto out; | |
66ad69d6 MT |
1246 | } else { |
1247 | /* | |
1248 | * sleep awaiting carrier | |
1249 | */ | |
eea83fd3 MT |
1250 | error = ttysleep(tp, (caddr_t)&tp->t_rawq, |
1251 | TTIPRI | PCATCH,ttopen, 0); | |
66ad69d6 | 1252 | splx(s); |
eea83fd3 | 1253 | if (error) |
09b836aa | 1254 | goto out; |
66ad69d6 MT |
1255 | goto loop; |
1256 | } | |
1257 | } | |
1258 | splx(s); | |
becb115c SL |
1259 | /* |
1260 | * Hang the process if it's in the background. | |
1261 | */ | |
3789a403 MK |
1262 | if (isbackground(p, tp) && |
1263 | tp->t_lflag&TOSTOP && (p->p_flag&SPPWAIT) == 0 && | |
1264 | (p->p_sigignore & sigmask(SIGTTOU)) == 0 && | |
1265 | (p->p_sigmask & sigmask(SIGTTOU)) == 0 && | |
1266 | p->p_pgrp->pg_jobc) { | |
1267 | pgsignal(p->p_pgrp, SIGTTOU, 1); | |
eea83fd3 MT |
1268 | if (error = ttysleep(tp, (caddr_t)&lbolt, TTIPRI | PCATCH, |
1269 | ttybg, 0)) | |
09b836aa | 1270 | goto out; |
93d2ecff | 1271 | goto loop; |
4147b3f6 | 1272 | } |
becb115c SL |
1273 | /* |
1274 | * Process the user's data in at most OBUFSIZ | |
09b836aa MK |
1275 | * chunks. Perform any output translation. |
1276 | * Keep track of high water mark, sleep on overflow | |
1277 | * awaiting device aid in acquiring new space. | |
becb115c | 1278 | */ |
09b836aa MK |
1279 | while (uio->uio_resid > 0 || cc > 0) { |
1280 | if (tp->t_lflag&FLUSHO) { | |
1281 | uio->uio_resid = 0; | |
1282 | return (0); | |
b482b2c8 | 1283 | } |
09b836aa MK |
1284 | if (tp->t_outq.c_cc > hiwat) |
1285 | goto ovhiwat; | |
becb115c | 1286 | /* |
09b836aa MK |
1287 | * Grab a hunk of data from the user, |
1288 | * unless we have some leftover from last time. | |
becb115c | 1289 | */ |
913ea2d1 | 1290 | if (cc == 0) { |
09b836aa MK |
1291 | cc = min(uio->uio_resid, OBUFSIZ); |
1292 | cp = obuf; | |
1293 | error = uiomove(cp, cc, uio); | |
1294 | if (error) { | |
1295 | cc = 0; | |
1296 | break; | |
1297 | } | |
913ea2d1 | 1298 | } |
2c6a4e11 | 1299 | #ifdef notdef |
becb115c SL |
1300 | /* |
1301 | * If nothing fancy need be done, grab those characters we | |
1302 | * can handle without any of ttyoutput's processing and | |
1303 | * just transfer them to the output q. For those chars | |
1304 | * which require special processing (as indicated by the | |
1305 | * bits in partab), call ttyoutput. After processing | |
1306 | * a hunk of data, look for FLUSHO so ^O's will take effect | |
1307 | * immediately. | |
1308 | */ | |
1309 | while (cc > 0) { | |
2c6a4e11 | 1310 | if (!(tp->t_oflag&OPOST)) |
4147b3f6 BJ |
1311 | ce = cc; |
1312 | else { | |
3f36033f | 1313 | ce = cc - scanc((unsigned)cc, (u_char *)cp, |
d554174a | 1314 | (u_char *)partab, CCLASSMASK); |
becb115c SL |
1315 | /* |
1316 | * If ce is zero, then we're processing | |
1317 | * a special character through ttyoutput. | |
1318 | */ | |
1319 | if (ce == 0) { | |
4147b3f6 BJ |
1320 | tp->t_rocount = 0; |
1321 | if (ttyoutput(*cp, tp) >= 0) { | |
93d2ecff JB |
1322 | /* no c-lists, wait a bit */ |
1323 | ttstart(tp); | |
eea83fd3 MT |
1324 | if (error = ttysleep(tp, |
1325 | (caddr_t)&lbolt, | |
1326 | TTOPRI | PCATCH, ttybuf, 0)) | |
09b836aa | 1327 | break; |
93d2ecff | 1328 | goto loop; |
4147b3f6 | 1329 | } |
becb115c | 1330 | cp++, cc--; |
2c6a4e11 | 1331 | if (tp->t_lflag&FLUSHO || |
becb115c | 1332 | tp->t_outq.c_cc > hiwat) |
4147b3f6 | 1333 | goto ovhiwat; |
becb115c | 1334 | continue; |
4147b3f6 BJ |
1335 | } |
1336 | } | |
becb115c SL |
1337 | /* |
1338 | * A bunch of normal characters have been found, | |
1339 | * transfer them en masse to the output queue and | |
1340 | * continue processing at the top of the loop. | |
1341 | * If there are any further characters in this | |
1342 | * <= OBUFSIZ chunk, the first should be a character | |
1343 | * requiring special handling by ttyoutput. | |
1344 | */ | |
4147b3f6 | 1345 | tp->t_rocount = 0; |
becb115c SL |
1346 | i = b_to_q(cp, ce, &tp->t_outq); |
1347 | ce -= i; | |
1348 | tp->t_col += ce; | |
1349 | cp += ce, cc -= ce, tk_nout += ce; | |
e39f9ea6 | 1350 | tp->t_outcc += ce; |
becb115c SL |
1351 | if (i > 0) { |
1352 | /* out of c-lists, wait a bit */ | |
4147b3f6 | 1353 | ttstart(tp); |
eea83fd3 MT |
1354 | if (error = ttysleep(tp, (caddr_t)&lbolt, |
1355 | TTOPRI | PCATCH, ttybuf, 0)) | |
09b836aa | 1356 | break; |
93d2ecff | 1357 | goto loop; |
4147b3f6 | 1358 | } |
2c6a4e11 | 1359 | if (tp->t_lflag&FLUSHO || tp->t_outq.c_cc > hiwat) |
09b836aa | 1360 | break; |
4147b3f6 | 1361 | } |
2c6a4e11 | 1362 | ttstart(tp); |
e39f9ea6 | 1363 | ttstart(tp); |
4147b3f6 | 1364 | } |
09b836aa MK |
1365 | out: |
1366 | /* | |
1367 | * If cc is nonzero, we leave the uio structure inconsistent, | |
1368 | * as the offset and iov pointers have moved forward, | |
1369 | * but it doesn't matter (the call will either return short | |
1370 | * or restart with a new uio). | |
1371 | */ | |
1372 | uio->uio_resid += cc; | |
840510a3 | 1373 | return (error); |
09b836aa | 1374 | |
4147b3f6 | 1375 | ovhiwat: |
b482b2c8 MK |
1376 | ttstart(tp); |
1377 | s = spltty(); | |
becb115c | 1378 | /* |
2c6a4e11 | 1379 | * This can only occur if FLUSHO is set in t_lflag, |
b482b2c8 | 1380 | * or if ttstart/oproc is synchronous (or very fast). |
becb115c | 1381 | */ |
4147b3f6 | 1382 | if (tp->t_outq.c_cc <= hiwat) { |
becb115c | 1383 | splx(s); |
4147b3f6 BJ |
1384 | goto loop; |
1385 | } | |
c4ec2128 | 1386 | if (flag & IO_NDELAY) { |
4f3a716e | 1387 | splx(s); |
09b836aa | 1388 | uio->uio_resid += cc; |
913ea2d1 | 1389 | if (uio->uio_resid == cnt) |
840510a3 BJ |
1390 | return (EWOULDBLOCK); |
1391 | return (0); | |
4147b3f6 BJ |
1392 | } |
1393 | tp->t_state |= TS_ASLEEP; | |
eea83fd3 | 1394 | error = ttysleep(tp, (caddr_t)&tp->t_outq, TTOPRI | PCATCH, ttyout, 0); |
becb115c | 1395 | splx(s); |
eea83fd3 | 1396 | if (error) |
09b836aa | 1397 | goto out; |
4147b3f6 BJ |
1398 | goto loop; |
1399 | } | |
1400 | ||
1401 | /* | |
1402 | * Rubout one character from the rawq of tp | |
1403 | * as cleanly as possible. | |
1404 | */ | |
1405 | ttyrub(c, tp) | |
4b72e2f9 SL |
1406 | register c; |
1407 | register struct tty *tp; | |
4147b3f6 BJ |
1408 | { |
1409 | register char *cp; | |
1410 | register int savecol; | |
1411 | int s; | |
1412 | char *nextc(); | |
1413 | ||
2c6a4e11 | 1414 | if ((tp->t_lflag&ECHO) == 0) |
4147b3f6 | 1415 | return; |
2c6a4e11 | 1416 | if (tp->t_lflag&ECHOE) { |
4147b3f6 BJ |
1417 | if (tp->t_rocount == 0) { |
1418 | /* | |
1419 | * Screwed by ttwrite; retype | |
1420 | */ | |
1421 | ttyretype(tp); | |
1422 | return; | |
1423 | } | |
2c6a4e11 | 1424 | /* if tab or newline was escaped - XXX - not 8bit */ |
e39f9ea6 | 1425 | if (c == ('\t'|TTY_QUOTE) || c == ('\n'|TTY_QUOTE)) |
4147b3f6 | 1426 | ttyrubo(tp, 2); |
d554174a | 1427 | else switch (CCLASS(c &= TTY_CHARMASK)) { |
4147b3f6 BJ |
1428 | |
1429 | case ORDINARY: | |
2c6a4e11 | 1430 | #ifdef notdef |
e39f9ea6 | 1431 | ttyrubo(tp, 1); |
4147b3f6 BJ |
1432 | break; |
1433 | ||
1434 | case VTAB: | |
1435 | case BACKSPACE: | |
1436 | case CONTROL: | |
1437 | case RETURN: | |
3789a403 | 1438 | case NEWLINE: |
2c6a4e11 | 1439 | if (tp->t_lflag&ECHOCTL) |
4147b3f6 BJ |
1440 | ttyrubo(tp, 2); |
1441 | break; | |
1442 | ||
e39f9ea6 MT |
1443 | case TAB: { |
1444 | int c; | |
1445 | ||
4147b3f6 BJ |
1446 | if (tp->t_rocount < tp->t_rawq.c_cc) { |
1447 | ttyretype(tp); | |
1448 | return; | |
1449 | } | |
4f3a716e | 1450 | s = spltty(); |
4147b3f6 | 1451 | savecol = tp->t_col; |
becb115c | 1452 | tp->t_state |= TS_CNTTB; |
2c6a4e11 | 1453 | tp->t_lflag |= FLUSHO; |
4147b3f6 | 1454 | tp->t_col = tp->t_rocol; |
becb115c | 1455 | cp = tp->t_rawq.c_cf; |
2c6a4e11 | 1456 | tp->t_lflag &= ~FLUSHO; |
becb115c | 1457 | tp->t_state &= ~TS_CNTTB; |
4147b3f6 BJ |
1458 | splx(s); |
1459 | /* | |
1460 | * savecol will now be length of the tab | |
1461 | */ | |
1462 | savecol -= tp->t_col; | |
1463 | tp->t_col += savecol; | |
1464 | if (savecol > 8) | |
1465 | savecol = 8; /* overflow screw */ | |
1466 | while (--savecol >= 0) | |
1467 | (void) ttyoutput('\b', tp); | |
1468 | break; | |
e39f9ea6 | 1469 | } |
4147b3f6 BJ |
1470 | |
1471 | default: | |
66ad69d6 | 1472 | /* XXX */ |
e39f9ea6 | 1473 | printf("ttyrub: would panic c = %d, val = %d\n", |
d554174a | 1474 | c, CCLASS(c)); |
e39f9ea6 | 1475 | /*panic("ttyrub");*/ |
4147b3f6 | 1476 | } |
2c6a4e11 | 1477 | } else if (tp->t_lflag&ECHOPRT) { |
becb115c | 1478 | if ((tp->t_state&TS_ERASE) == 0) { |
4147b3f6 | 1479 | (void) ttyoutput('\\', tp); |
becb115c | 1480 | tp->t_state |= TS_ERASE; |
4147b3f6 BJ |
1481 | } |
1482 | ttyecho(c, tp); | |
1483 | } else | |
2c6a4e11 | 1484 | ttyecho(tp->t_cc[VERASE], tp); |
4147b3f6 BJ |
1485 | tp->t_rocount--; |
1486 | } | |
1487 | ||
1488 | /* | |
1489 | * Crt back over cnt chars perhaps | |
1490 | * erasing them. | |
1491 | */ | |
1492 | ttyrubo(tp, cnt) | |
4b72e2f9 SL |
1493 | register struct tty *tp; |
1494 | int cnt; | |
4147b3f6 | 1495 | { |
2c6a4e11 | 1496 | register char *rubostring = tp->t_lflag&ECHOE ? "\b \b" : "\b"; |
4147b3f6 BJ |
1497 | |
1498 | while (--cnt >= 0) | |
09b836aa | 1499 | ttyoutstr("\b \b", tp); |
4147b3f6 BJ |
1500 | } |
1501 | ||
1502 | /* | |
1503 | * Reprint the rawq line. | |
1504 | * We assume c_cc has already been checked. | |
1505 | */ | |
1506 | ttyretype(tp) | |
4b72e2f9 | 1507 | register struct tty *tp; |
4147b3f6 BJ |
1508 | { |
1509 | register char *cp; | |
1510 | char *nextc(); | |
e39f9ea6 | 1511 | int s, c; |
4147b3f6 | 1512 | |
2c6a4e11 MT |
1513 | if (tp->t_cc[VREPRINT] != POSIX_V_DISABLE) |
1514 | ttyecho(tp->t_cc[VREPRINT], tp); | |
4147b3f6 | 1515 | (void) ttyoutput('\n', tp); |
4f3a716e | 1516 | s = spltty(); |
e39f9ea6 MT |
1517 | /*** XXX *** FIX *** NEXTC IS BROKEN - DOESN'T CHECK QUOTE |
1518 | BIT OF FIRST CHAR ****/ | |
1519 | for (cp = tp->t_canq.c_cf, c=(cp?*cp:0); cp; cp = nextc(&tp->t_canq, cp, &c)) { | |
1520 | ttyecho(c, tp); | |
1521 | } | |
1522 | for (cp = tp->t_rawq.c_cf, c=(cp?*cp:0); cp; cp = nextc(&tp->t_rawq, cp, &c)) { | |
1523 | ttyecho(c, tp); | |
1524 | } | |
becb115c | 1525 | tp->t_state &= ~TS_ERASE; |
4147b3f6 BJ |
1526 | splx(s); |
1527 | tp->t_rocount = tp->t_rawq.c_cc; | |
1528 | tp->t_rocol = 0; | |
1529 | } | |
1530 | ||
1531 | /* | |
2c6a4e11 | 1532 | * Echo a typed character to the terminal. |
4147b3f6 BJ |
1533 | */ |
1534 | ttyecho(c, tp) | |
4b72e2f9 SL |
1535 | register c; |
1536 | register struct tty *tp; | |
4147b3f6 | 1537 | { |
4147b3f6 | 1538 | c &= 0377; |
2c6a4e11 MT |
1539 | if ((tp->t_state&TS_CNTTB) == 0) |
1540 | tp->t_lflag &= ~FLUSHO; | |
1541 | if ((tp->t_lflag&ECHO) == 0 && !(tp->t_lflag&ECHONL && c == '\n')) | |
4147b3f6 | 1542 | return; |
2c6a4e11 | 1543 | if (tp->t_lflag&ECHOCTL) { |
09b836aa MK |
1544 | if ((c&TTY_CHARMASK) <= 037 && c != '\t' && c != '\n' || |
1545 | c == 0177) { | |
4147b3f6 | 1546 | (void) ttyoutput('^', tp); |
e39f9ea6 | 1547 | c &= TTY_CHARMASK; |
4147b3f6 BJ |
1548 | if (c == 0177) |
1549 | c = '?'; | |
2c6a4e11 | 1550 | #ifdef notdef |
2c6a4e11 | 1551 | #endif |
4147b3f6 BJ |
1552 | else |
1553 | c += 'A' - 1; | |
1554 | } | |
1555 | } | |
e39f9ea6 | 1556 | (void) ttyoutput(c, tp); |
4147b3f6 BJ |
1557 | * send string cp to tp |
1558 | */ | |
09b836aa | 1559 | ttyoutstr(cp, tp) |
4b72e2f9 SL |
1560 | register char *cp; |
1561 | register struct tty *tp; | |
4147b3f6 BJ |
1562 | { |
1563 | register char c; | |
1564 | ||
1565 | while (c = *cp++) | |
1566 | (void) ttyoutput(c, tp); | |
1567 | } | |
1568 | ||
d554174a MK |
1569 | /* |
1570 | * Wake up any readers on a tty. | |
1571 | */ | |
4147b3f6 | 1572 | ttwakeup(tp) |
3789a403 | 1573 | register struct tty *tp; |
4147b3f6 BJ |
1574 | { |
1575 | ||
1576 | if (tp->t_rsel) { | |
1577 | selwakeup(tp->t_rsel, tp->t_state&TS_RCOLL); | |
1578 | tp->t_state &= ~TS_RCOLL; | |
1579 | tp->t_rsel = 0; | |
1580 | } | |
88a7a62a | 1581 | if (tp->t_state & TS_ASYNC) |
face72c1 | 1582 | pgsignal(tp->t_pgrp, SIGIO, 1); |
4147b3f6 BJ |
1583 | wakeup((caddr_t)&tp->t_rawq); |
1584 | } | |
e39f9ea6 | 1585 | |
6cec2da2 MK |
1586 | /* |
1587 | * Look up a code for a specified speed in a conversion table; | |
1588 | * used by drivers to map software speed values to hardware parameters. | |
1589 | */ | |
1590 | ttspeedtab(speed, table) | |
1591 | register struct speedtab *table; | |
1592 | { | |
1593 | ||
1594 | for ( ; table->sp_speed != -1; table++) | |
1595 | if (table->sp_speed == speed) | |
1596 | return (table->sp_code); | |
1597 | return (-1); | |
1598 | } | |
1599 | ||
e39f9ea6 MT |
1600 | /* |
1601 | * set tty hi and low water marks | |
1602 | * | |
1603 | * Try to arrange the dynamics so there's about one second | |
1604 | * from hi to low water. | |
1605 | * | |
1606 | */ | |
1607 | ttsetwater(tp) | |
1608 | struct tty *tp; | |
1609 | { | |
1610 | register cps = tp->t_ospeed / 10; | |
1611 | register x; | |
1612 | ||
1613 | #define clamp(x, h, l) ((x)>h ? h : ((x)<l) ? l : (x)) | |
1614 | tp->t_lowat = x = clamp(cps/2, TTMAXLOWAT, TTMINLOWAT); | |
1615 | x += cps; | |
1616 | x = clamp(x, TTMAXHIWAT, TTMINHIWAT); | |
1617 | tp->t_hiwat = roundup(x, CBSIZE); | |
1618 | #undef clamp | |
1619 | } | |
1620 | ||
52004850 | 1621 | /* |
52004850 MT |
1622 | * Report on state of foreground process group. |
1623 | */ | |
1624 | ttyinfo(tp) | |
91c77c3e | 1625 | register struct tty *tp; |
52004850 | 1626 | { |
91c77c3e | 1627 | register struct proc *p, *pick; |
9872d890 | 1628 | struct timeval utime, stime; |
91c77c3e | 1629 | int tmp; |
52004850 MT |
1630 | |
1631 | if (ttycheckoutq(tp,0) == 0) | |
1632 | return; | |
91c77c3e KB |
1633 | |
1634 | /* Print load average. */ | |
1635 | tmp = (averunnable[0] * 100 + FSCALE / 2) >> FSHIFT; | |
1636 | ttyprintf(tp, "load: %d.%02d ", tmp / 100, tmp % 100); | |
1637 | ||
232c0273 | 1638 | if (tp->t_session == NULL) |
91c77c3e | 1639 | ttyprintf(tp, "not a controlling terminal\n"); |
9872d890 | 1640 | else if (tp->t_pgrp == NULL) |
91c77c3e | 1641 | ttyprintf(tp, "no foreground process group\n"); |
9872d890 | 1642 | else if ((p = tp->t_pgrp->pg_mem) == NULL) |
91c77c3e | 1643 | ttyprintf(tp, "empty foreground process group\n"); |
52004850 | 1644 | else { |
91c77c3e KB |
1645 | /* Pick interesting process. */ |
1646 | for (pick = NULL; p != NULL; p = p->p_pgrpnxt) | |
9872d890 MT |
1647 | if (proc_compare(pick, p)) |
1648 | pick = p; | |
91c77c3e KB |
1649 | |
1650 | ttyprintf(tp, " cmd: %s %d [%s] ", pick->p_comm, pick->p_pid, | |
1651 | pick->p_stat == SRUN ? "running" : | |
1652 | pick->p_wmesg ? pick->p_wmesg : "iowait"); | |
1653 | ||
1654 | /* | |
1655 | * Lock out clock if process is running; get user/system | |
1656 | * cpu time. | |
9872d890 | 1657 | */ |
3789a403 | 1658 | if (curproc == pick) |
91c77c3e | 1659 | tmp = splclock(); |
9872d890 MT |
1660 | utime = pick->p_utime; |
1661 | stime = pick->p_stime; | |
3789a403 | 1662 | if (curproc == pick) |
91c77c3e | 1663 | splx(tmp); |
9872d890 | 1664 | |
91c77c3e KB |
1665 | /* Print user time. */ |
1666 | ttyprintf(tp, "%d.%02du ", | |
1667 | utime.tv_sec, (utime.tv_usec + 5000) / 10000); | |
9872d890 | 1668 | |
91c77c3e KB |
1669 | /* Print system time. */ |
1670 | ttyprintf(tp, "%d.%02ds ", | |
1671 | stime.tv_sec, (stime.tv_usec + 5000) / 10000); | |
1672 | ||
1673 | #define pgtok(a) (((a) * NBPG) / 1024) | |
1674 | /* Print percentage cpu, resident set size. */ | |
1675 | tmp = pick->p_pctcpu * 10000 + FSCALE / 2 >> FSHIFT; | |
1676 | ttyprintf(tp, "%d%% %dk\n", | |
1677 | tmp / 100, pgtok(pick->p_vmspace->vm_rssize)); | |
52004850 | 1678 | } |
91c77c3e | 1679 | tp->t_rocount = 0; /* so pending input will be retyped if BS */ |
52004850 MT |
1680 | } |
1681 | ||
9872d890 MT |
1682 | /* |
1683 | * Returns 1 if p2 is "better" than p1 | |
1684 | * | |
1685 | * The algorithm for picking the "interesting" process is thus: | |
1686 | * | |
1687 | * 1) (Only foreground processes are eligable - implied) | |
1688 | * 2) Runnable processes are favored over anything | |
1689 | * else. The runner with the highest cpu | |
1690 | * utilization is picked (p_cpu). Ties are | |
1691 | * broken by picking the highest pid. | |
1692 | * 3 Next, the sleeper with the shortest sleep | |
1693 | * time is favored. With ties, we pick out | |
1694 | * just "short-term" sleepers (SSINTR == 0). | |
1695 | * Further ties are broken by picking the highest | |
1696 | * pid. | |
1697 | * | |
1698 | */ | |
1699 | #define isrun(p) (((p)->p_stat == SRUN) || ((p)->p_stat == SIDL)) | |
9ca8548a KM |
1700 | #define TESTAB(a, b) ((a)<<1 | (b)) |
1701 | #define ONLYA 2 | |
1702 | #define ONLYB 1 | |
1703 | #define BOTH 3 | |
1704 | ||
91c77c3e | 1705 | static int |
9872d890 MT |
1706 | proc_compare(p1, p2) |
1707 | register struct proc *p1, *p2; | |
1708 | { | |
1709 | ||
1710 | if (p1 == NULL) | |
1711 | return (1); | |
1712 | /* | |
1713 | * see if at least one of them is runnable | |
1714 | */ | |
9ca8548a KM |
1715 | switch (TESTAB(isrun(p1), isrun(p2))) { |
1716 | case ONLYA: | |
9872d890 | 1717 | return (0); |
9ca8548a KM |
1718 | case ONLYB: |
1719 | return (1); | |
1720 | case BOTH: | |
9872d890 MT |
1721 | /* |
1722 | * tie - favor one with highest recent cpu utilization | |
1723 | */ | |
1724 | if (p2->p_cpu > p1->p_cpu) | |
1725 | return (1); | |
1726 | if (p1->p_cpu > p2->p_cpu) | |
1727 | return (0); | |
1728 | return (p2->p_pid > p1->p_pid); /* tie - return highest pid */ | |
1729 | } | |
9ca8548a KM |
1730 | /* |
1731 | * weed out zombies | |
1732 | */ | |
1733 | switch (TESTAB(p1->p_stat == SZOMB, p2->p_stat == SZOMB)) { | |
1734 | case ONLYA: | |
1735 | return (1); | |
1736 | case ONLYB: | |
1737 | return (0); | |
1738 | case BOTH: | |
1739 | return (p2->p_pid > p1->p_pid); /* tie - return highest pid */ | |
1740 | } | |
9872d890 MT |
1741 | /* |
1742 | * pick the one with the smallest sleep time | |
1743 | */ | |
1744 | if (p2->p_slptime > p1->p_slptime) | |
1745 | return (0); | |
1746 | if (p1->p_slptime > p2->p_slptime) | |
1747 | return (1); | |
1748 | /* | |
1749 | * favor one sleeping in a non-interruptible sleep | |
1750 | */ | |
1751 | if (p1->p_flag&SSINTR && (p2->p_flag&SSINTR) == 0) | |
1752 | return (1); | |
1753 | if (p2->p_flag&SSINTR && (p1->p_flag&SSINTR) == 0) | |
1754 | return (0); | |
3789a403 | 1755 | return (p2->p_pid > p1->p_pid); /* tie - return highest pid */ |
9872d890 | 1756 | } |
9ca8548a | 1757 | |
232c0273 MT |
1758 | /* |
1759 | * Output char to tty; console putchar style. | |
1760 | */ | |
1761 | tputchar(c, tp) | |
1762 | int c; | |
1763 | struct tty *tp; | |
1764 | { | |
1765 | register s = spltty(); | |
1766 | ||
3789a403 | 1767 | if ((tp->t_state & (TS_CARR_ON|TS_ISOPEN)) == (TS_CARR_ON|TS_ISOPEN)) { |
232c0273 MT |
1768 | if (c == '\n') |
1769 | (void) ttyoutput('\r', tp); | |
1770 | (void) ttyoutput(c, tp); | |
1771 | ttstart(tp); | |
1772 | splx(s); | |
1773 | return (0); | |
1774 | } | |
1775 | splx(s); | |
1776 | return (-1); | |
52004850 | 1777 | } |
eea83fd3 | 1778 | |
e6745ca3 | 1779 | /* |
d554174a MK |
1780 | * Sleep on chan, returning ERESTART if tty changed |
1781 | * while we napped and returning any errors (e.g. EINTR/ETIMEDOUT) | |
1782 | * reported by tsleep. If the tty is revoked, restarting a pending | |
1783 | * call will redo validation done at the start of the call. | |
e6745ca3 | 1784 | */ |
eea83fd3 MT |
1785 | ttysleep(tp, chan, pri, wmesg, timo) |
1786 | struct tty *tp; | |
1787 | caddr_t chan; | |
1788 | int pri; | |
1789 | char *wmesg; | |
1790 | int timo; | |
1791 | { | |
1792 | int error; | |
1793 | short gen = tp->t_gen; | |
1794 | ||
1795 | if (error = tsleep(chan, pri, wmesg, timo)) | |
1796 | return (error); | |
1797 | if (tp->t_gen != gen) | |
1798 | return (ERESTART); | |
1799 | return (0); | |
1800 | } |