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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 | * |
174ab115 | 8 | * @(#)tty.c 7.56 (Berkeley) %G% |
da7c5cc6 | 9 | */ |
961945a8 | 10 | |
38a01dbe KB |
11 | #include <sys/param.h> |
12 | #include <sys/systm.h> | |
13 | #include <sys/ioctl.h> | |
14 | #include <sys/proc.h> | |
2c6a4e11 | 15 | #define TTYDEFCHARS |
38a01dbe | 16 | #include <sys/tty.h> |
2c6a4e11 | 17 | #undef TTYDEFCHARS |
e39f9ea6 MT |
18 | #define TTYDEFCHARS |
19 | #include "ttydefaults.h" | |
20 | #undef TTYDEFCHARS | |
21 | #include "termios.h" | |
38a01dbe KB |
22 | #include <sys/file.h> |
23 | #include <sys/conf.h> | |
24 | #include <sys/dkstat.h> | |
25 | #include <sys/uio.h> | |
26 | #include <sys/kernel.h> | |
27 | #include <sys/vnode.h> | |
28 | #include <sys/syslog.h> | |
d301d150 | 29 | |
38a01dbe | 30 | #include <vm/vm.h> |
e39f9ea6 | 31 | #include "syslog.h" |
89dc6dfb | 32 | |
91c77c3e KB |
33 | static int proc_compare __P((struct proc *p1, struct proc *p2)); |
34 | ||
09b836aa MK |
35 | /* symbolic sleep message strings */ |
36 | char ttyin[] = "ttyin"; | |
37 | char ttyout[] = "ttyout"; | |
bbd77f60 MT |
38 | char ttopen[] = "ttyopn"; |
39 | char ttclos[] = "ttycls"; | |
09b836aa MK |
40 | char ttybg[] = "ttybg"; |
41 | char ttybuf[] = "ttybuf"; | |
42 | ||
8bba2b8f RE |
43 | /* |
44 | * Table giving parity for characters and indicating | |
e39f9ea6 MT |
45 | * character classes to tty driver. The 8th bit |
46 | * indicates parity, the 7th bit indicates the character | |
47 | * is an alphameric or underscore (for ALTWERASE), and the | |
48 | * low 6 bits indicate delay type. If the low 6 bits are 0 | |
d554174a MK |
49 | * then the character needs no special processing on output; |
50 | * classes other than 0 might be translated or (not currently) | |
51 | * require delays. | |
8bba2b8f | 52 | */ |
d554174a MK |
53 | #define PARITY(c) (partab[c] & 0x80) |
54 | #define ISALPHA(c) (partab[(c)&TTY_CHARMASK] & 0x40) | |
55 | #define CCLASSMASK 0x3f | |
56 | #define CCLASS(c) (partab[c] & CCLASSMASK) | |
57 | ||
58 | #define E 0x00 /* even parity */ | |
59 | #define O 0x80 /* odd parity */ | |
60 | #define ALPHA 0x40 /* alpha or underscore */ | |
61 | ||
62 | #define NO ORDINARY | |
63 | #define NA ORDINARY|ALPHA | |
64 | #define CC CONTROL | |
65 | #define BS BACKSPACE | |
66 | #define NL NEWLINE | |
67 | #define TB TAB | |
68 | #define VT VTAB | |
69 | #define CR RETURN | |
8bba2b8f RE |
70 | |
71 | char partab[] = { | |
d554174a MK |
72 | E|CC, O|CC, O|CC, E|CC, O|CC, E|CC, E|CC, O|CC, /* nul - bel */ |
73 | O|BS, E|TB, E|NL, O|CC, E|VT, O|CR, O|CC, E|CC, /* bs - si */ | |
74 | O|CC, E|CC, E|CC, O|CC, E|CC, O|CC, O|CC, E|CC, /* dle - etb */ | |
75 | E|CC, O|CC, O|CC, E|CC, O|CC, E|CC, E|CC, O|CC, /* can - us */ | |
76 | O|NO, E|NO, E|NO, O|NO, E|NO, O|NO, O|NO, E|NO, /* sp - ' */ | |
77 | E|NO, O|NO, O|NO, E|NO, O|NO, E|NO, E|NO, O|NO, /* ( - / */ | |
78 | E|NA, O|NA, O|NA, E|NA, O|NA, E|NA, E|NA, O|NA, /* 0 - 7 */ | |
79 | O|NA, E|NA, E|NO, O|NO, E|NO, O|NO, O|NO, E|NO, /* 8 - ? */ | |
80 | O|NO, E|NA, E|NA, O|NA, E|NA, O|NA, O|NA, E|NA, /* @ - G */ | |
81 | E|NA, O|NA, O|NA, E|NA, O|NA, E|NA, E|NA, O|NA, /* H - O */ | |
82 | E|NA, O|NA, O|NA, E|NA, O|NA, E|NA, E|NA, O|NA, /* P - W */ | |
83 | O|NA, E|NA, E|NA, O|NO, E|NO, O|NO, O|NO, O|NA, /* X - _ */ | |
84 | E|NO, O|NA, O|NA, E|NA, O|NA, E|NA, E|NA, O|NA, /* ` - g */ | |
85 | O|NA, E|NA, E|NA, O|NA, E|NA, O|NA, O|NA, E|NA, /* h - o */ | |
86 | O|NA, E|NA, E|NA, O|NA, E|NA, O|NA, O|NA, E|NA, /* p - w */ | |
87 | E|NA, O|NA, O|NA, E|NO, O|NO, E|NO, E|NO, O|CC, /* x - del */ | |
8bba2b8f | 88 | /* |
d554174a MK |
89 | * "meta" chars; should be settable per charset. |
90 | * For now, treat all as normal characters. | |
8bba2b8f | 91 | */ |
d554174a MK |
92 | NA, NA, NA, NA, NA, NA, NA, NA, |
93 | NA, NA, NA, NA, NA, NA, NA, NA, | |
94 | NA, NA, NA, NA, NA, NA, NA, NA, | |
95 | NA, NA, NA, NA, NA, NA, NA, NA, | |
96 | NA, NA, NA, NA, NA, NA, NA, NA, | |
97 | NA, NA, NA, NA, NA, NA, NA, NA, | |
98 | NA, NA, NA, NA, NA, NA, NA, NA, | |
99 | NA, NA, NA, NA, NA, NA, NA, NA, | |
100 | NA, NA, NA, NA, NA, NA, NA, NA, | |
101 | NA, NA, NA, NA, NA, NA, NA, NA, | |
102 | NA, NA, NA, NA, NA, NA, NA, NA, | |
103 | NA, NA, NA, NA, NA, NA, NA, NA, | |
104 | NA, NA, NA, NA, NA, NA, NA, NA, | |
105 | NA, NA, NA, NA, NA, NA, NA, NA, | |
106 | NA, NA, NA, NA, NA, NA, NA, NA, | |
107 | NA, NA, NA, NA, NA, NA, NA, NA, | |
89dc6dfb | 108 | }; |
d554174a MK |
109 | #undef NO |
110 | #undef NA | |
111 | #undef CC | |
112 | #undef BS | |
113 | #undef NL | |
114 | #undef TB | |
115 | #undef VT | |
116 | #undef CR | |
89dc6dfb | 117 | |
adf4bc89 | 118 | extern struct tty *constty; /* temporary virtual console */ |
2c6a4e11 | 119 | |
e39f9ea6 MT |
120 | /* |
121 | * Is 'c' a line delimiter ("break" character)? | |
122 | */ | |
09b836aa MK |
123 | #define ttbreakc(c) ((c) == '\n' || ((c) == cc[VEOF] || \ |
124 | (c) == cc[VEOL] || (c) == cc[VEOL2]) && (c) != _POSIX_VDISABLE) | |
e39f9ea6 | 125 | |
2c6a4e11 MT |
126 | /* |
127 | * Debugging aids | |
128 | */ | |
129 | #define dprintf if (tp->t_trace & TTRACE_IO)printf | |
130 | ||
131 | /* | |
132 | * Is 'c' a line delimiter ("break" character)? | |
133 | */ | |
134 | #define ttbreakc(c) (c == '\n' || CCEQ(cc[VEOF], c) || \ | |
135 | CCEQ(cc[VEOL], c) || CCEQ(cc[VEOL2], c)) | |
adf4bc89 | 136 | |
89dc6dfb | 137 | ttychars(tp) |
becb115c | 138 | struct tty *tp; |
89dc6dfb | 139 | { |
3789a403 | 140 | |
2c6a4e11 | 141 | bcopy(ttydefchars, tp->t_cc, sizeof(ttydefchars)); |
89dc6dfb BJ |
142 | } |
143 | ||
144 | /* | |
2c6a4e11 | 145 | * |
d554174a | 146 | * Flush tty after output has drained. |
89dc6dfb | 147 | */ |
88a7a62a | 148 | ttywflush(tp) |
66ad69d6 | 149 | struct tty *tp; |
89dc6dfb | 150 | { |
09b836aa | 151 | int error; |
89dc6dfb | 152 | |
09b836aa MK |
153 | if ((error = ttywait(tp)) == 0) |
154 | ttyflush(tp, FREAD); | |
155 | return (error); | |
88a7a62a SL |
156 | } |
157 | ||
e39f9ea6 MT |
158 | /* |
159 | * Wait for output to drain. | |
160 | */ | |
2c6a4e11 MT |
161 | /* |
162 | * Wait for output to drain. | |
163 | */ | |
88a7a62a SL |
164 | ttywait(tp) |
165 | register struct tty *tp; | |
166 | { | |
09b836aa | 167 | int error = 0, s = spltty(); |
88a7a62a | 168 | |
5de287d9 | 169 | while ((tp->t_outq.c_cc || tp->t_state&TS_BUSY) && |
66ad69d6 MT |
170 | (tp->t_state&TS_CARR_ON || tp->t_cflag&CLOCAL) && |
171 | tp->t_oproc) { | |
50e2732b | 172 | (*tp->t_oproc)(tp); |
941944c9 | 173 | tp->t_state |= TS_ASLEEP; |
eea83fd3 MT |
174 | if (error = ttysleep(tp, (caddr_t)&tp->t_outq, |
175 | TTOPRI | PCATCH, ttyout, 0)) | |
09b836aa | 176 | break; |
50e2732b | 177 | } |
875a1e2c | 178 | splx(s); |
09b836aa | 179 | return (error); |
89dc6dfb BJ |
180 | } |
181 | ||
b50ead57 CT |
182 | #define flushq(q) { \ |
183 | if ((q)->c_cc) \ | |
184 | ndflush(q, (q)->c_cc); \ | |
d554174a MK |
185 | } |
186 | ||
89dc6dfb | 187 | /* |
d554174a MK |
188 | * Flush TTY read and/or write queues, |
189 | * notifying anyone waiting. | |
89dc6dfb | 190 | */ |
88a7a62a | 191 | ttyflush(tp, rw) |
4b72e2f9 | 192 | register struct tty *tp; |
b50ead57 | 193 | int rw; |
89dc6dfb | 194 | { |
b50ead57 | 195 | register int s; |
50e2732b | 196 | |
4f3a716e | 197 | s = spltty(); |
50e2732b | 198 | if (rw & FREAD) { |
d554174a MK |
199 | flushq(&tp->t_canq); |
200 | flushq(&tp->t_rawq); | |
201 | tp->t_rocount = 0; | |
202 | tp->t_rocol = 0; | |
203 | tp->t_state &= ~TS_LOCAL; | |
66ad69d6 | 204 | ttwakeup(tp); |
50e2732b BJ |
205 | } |
206 | if (rw & FWRITE) { | |
941944c9 | 207 | tp->t_state &= ~TS_TTSTOP; |
b50ead57 CT |
208 | #ifdef sun4c /* XXX */ |
209 | (*tp->t_stop)(tp, rw); | |
210 | #else | |
39697bd8 | 211 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, rw); |
b50ead57 | 212 | #endif |
d554174a MK |
213 | flushq(&tp->t_outq); |
214 | wakeup((caddr_t)&tp->t_outq); | |
77f9c500 | 215 | selwakeup(&tp->t_wsel); |
50e2732b BJ |
216 | } |
217 | splx(s); | |
89dc6dfb BJ |
218 | } |
219 | ||
50e2732b BJ |
220 | /* |
221 | * Send stop character on input overflow. | |
222 | */ | |
223 | ttyblock(tp) | |
4b72e2f9 | 224 | register struct tty *tp; |
89dc6dfb | 225 | { |
50e2732b | 226 | register x; |
becb115c | 227 | |
50e2732b BJ |
228 | x = tp->t_rawq.c_cc + tp->t_canq.c_cc; |
229 | if (tp->t_rawq.c_cc > TTYHOG) { | |
88a7a62a | 230 | ttyflush(tp, FREAD|FWRITE); |
941944c9 | 231 | tp->t_state &= ~TS_TBLOCK; |
50e2732b | 232 | } |
600d5712 MK |
233 | /* |
234 | * Block further input iff: | |
235 | * Current input > threshold AND input is available to user program | |
236 | */ | |
96ea38ce | 237 | if (x >= TTYHOG/2 && (tp->t_state & TS_TBLOCK) == 0 && |
2c6a4e11 MT |
238 | (!(tp->t_lflag&ICANON)) || (tp->t_canq.c_cc > 0) && |
239 | tp->t_cc[VSTOP] != POSIX_V_DISABLE) { | |
240 | if (putc(tp->t_cc[VSTOP], &tp->t_outq)==0) { | |
600d5712 MK |
241 | tp->t_state |= TS_TBLOCK; |
242 | ttstart(tp); | |
243 | } | |
50e2732b | 244 | } |
89dc6dfb BJ |
245 | } |
246 | ||
3789a403 MK |
247 | ttstart(tp) |
248 | struct tty *tp; | |
249 | { | |
250 | ||
251 | if (tp->t_oproc) /* kludge for pty */ | |
252 | (*tp->t_oproc)(tp); | |
253 | } | |
254 | ||
2bf0f8a5 CT |
255 | void |
256 | ttrstrt(tp0) | |
257 | void *tp0; | |
101ba270 | 258 | { |
2bf0f8a5 | 259 | struct tty *tp; |
b50ead57 | 260 | int s; |
101ba270 | 261 | |
2bf0f8a5 | 262 | tp = (struct tty *)tp0; |
09b836aa | 263 | #ifdef DIAGNOSTIC |
becb115c SL |
264 | if (tp == 0) |
265 | panic("ttrstrt"); | |
09b836aa | 266 | #endif |
b50ead57 | 267 | s = spltty(); |
941944c9 | 268 | tp->t_state &= ~TS_TIMEOUT; |
50e2732b | 269 | ttstart(tp); |
b50ead57 | 270 | splx(s); |
101ba270 BJ |
271 | } |
272 | ||
89dc6dfb BJ |
273 | |
274 | /* | |
d554174a MK |
275 | * Common code for ioctls on tty devices. |
276 | * Called after line-discipline-specific ioctl | |
277 | * has been called to do discipline-specific functions | |
278 | * and/or reject any of these ioctl commands. | |
89dc6dfb | 279 | */ |
49c84d3f | 280 | /*ARGSUSED*/ |
4b72e2f9 SL |
281 | ttioctl(tp, com, data, flag) |
282 | register struct tty *tp; | |
b50ead57 | 283 | int com; |
4b72e2f9 | 284 | caddr_t data; |
b50ead57 | 285 | int flag; |
89dc6dfb | 286 | { |
3789a403 | 287 | register struct proc *p = curproc; /* XXX */ |
89dc6dfb | 288 | extern int nldisp; |
2c6a4e11 | 289 | int soft; |
849cbd39 | 290 | int s, error; |
89dc6dfb | 291 | |
50e2732b BJ |
292 | /* |
293 | * If the ioctl involves modification, | |
4f3a716e | 294 | * hang if in the background. |
50e2732b | 295 | */ |
4b72e2f9 | 296 | switch (com) { |
50e2732b | 297 | |
2c6a4e11 | 298 | case TIOCSETD: |
50e2732b | 299 | case TIOCFLUSH: |
8203fe05 | 300 | case TIOCSTI: |
f9eea644 | 301 | case TIOCSWINSZ: |
2c6a4e11 MT |
302 | case TIOCSETA: |
303 | case TIOCSETAW: | |
304 | case TIOCSETAF: | |
b50ead57 | 305 | #if defined(COMPAT_43) || defined(COMPAT_SUNOS) |
fa4fb7b0 MT |
306 | case TIOCSETP: |
307 | case TIOCSETN: | |
308 | case TIOCSETC: | |
309 | case TIOCSLTC: | |
310 | case TIOCLBIS: | |
311 | case TIOCLBIC: | |
312 | case TIOCLSET: | |
313 | case OTIOCSETD: | |
314 | #endif | |
3789a403 MK |
315 | while (isbackground(curproc, tp) && |
316 | p->p_pgrp->pg_jobc && (p->p_flag&SPPWAIT) == 0 && | |
317 | (p->p_sigignore & sigmask(SIGTTOU)) == 0 && | |
318 | (p->p_sigmask & sigmask(SIGTTOU)) == 0) { | |
319 | pgsignal(p->p_pgrp, SIGTTOU, 1); | |
eea83fd3 MT |
320 | if (error = ttysleep(tp, (caddr_t)&lbolt, |
321 | TTOPRI | PCATCH, ttybg, 0)) | |
09b836aa | 322 | return (error); |
50e2732b BJ |
323 | } |
324 | break; | |
325 | } | |
326 | ||
becb115c SL |
327 | /* |
328 | * Process the ioctl. | |
329 | */ | |
4b72e2f9 | 330 | switch (com) { |
89dc6dfb | 331 | |
fc6972ae | 332 | /* get discipline number */ |
89dc6dfb | 333 | case TIOCGETD: |
4b72e2f9 | 334 | *(int *)data = tp->t_line; |
89dc6dfb BJ |
335 | break; |
336 | ||
fc6972ae | 337 | /* set line discipline */ |
4b72e2f9 SL |
338 | case TIOCSETD: { |
339 | register int t = *(int *)data; | |
2c6a4e11 | 340 | dev_t dev = tp->t_dev; |
e39f9ea6 | 341 | dev_t dev = tp->t_dev; |
4b72e2f9 | 342 | |
e39f9ea6 | 343 | if ((unsigned)t >= nldisp) |
4a003df3 | 344 | return (ENXIO); |
2eaeef4d MK |
345 | if (t != tp->t_line) { |
346 | s = spltty(); | |
adacc19e | 347 | (*linesw[tp->t_line].l_close)(tp, flag); |
2eaeef4d MK |
348 | error = (*linesw[t].l_open)(dev, tp); |
349 | if (error) { | |
2c6a4e11 | 350 | (void)(*linesw[tp->t_line].l_open)(dev, tp); |
2eaeef4d MK |
351 | splx(s); |
352 | return (error); | |
353 | } | |
354 | tp->t_line = t; | |
4a003df3 | 355 | splx(s); |
4a003df3 | 356 | } |
2c6a4e11 MT |
357 | if (tp->t_trace & TTRACE_STATE) |
358 | ttytrace(com, tp); | |
89dc6dfb | 359 | break; |
4b72e2f9 | 360 | } |
89dc6dfb | 361 | |
fc6972ae | 362 | /* prevent more opens on channel */ |
152c2598 | 363 | case TIOCEXCL: |
b50ead57 | 364 | s = spltty(); |
152c2598 | 365 | tp->t_state |= TS_XCLUDE; |
b50ead57 | 366 | splx(s); |
152c2598 BJ |
367 | break; |
368 | ||
369 | case TIOCNXCL: | |
b50ead57 | 370 | s = spltty(); |
152c2598 | 371 | tp->t_state &= ~TS_XCLUDE; |
b50ead57 | 372 | splx(s); |
152c2598 BJ |
373 | break; |
374 | ||
b50ead57 | 375 | #ifdef TIOCHPCL |
89dc6dfb | 376 | case TIOCHPCL: |
b50ead57 | 377 | s = spltty(); |
2c6a4e11 | 378 | tp->t_cflag |= HUPCL; |
89dc6dfb | 379 | break; |
b50ead57 | 380 | #endif |
89dc6dfb | 381 | |
7d973a4d | 382 | case TIOCFLUSH: { |
4b72e2f9 SL |
383 | register int flags = *(int *)data; |
384 | ||
385 | if (flags == 0) | |
7d973a4d | 386 | flags = FREAD|FWRITE; |
4b72e2f9 SL |
387 | else |
388 | flags &= FREAD|FWRITE; | |
88a7a62a | 389 | ttyflush(tp, flags); |
89dc6dfb | 390 | break; |
4568c08e | 391 | } |
89dc6dfb | 392 | |
66ad69d6 | 393 | case FIOASYNC: |
b50ead57 | 394 | s = spltty(); |
66ad69d6 MT |
395 | if (*(int *)data) |
396 | tp->t_state |= TS_ASYNC; | |
397 | else | |
398 | tp->t_state &= ~TS_ASYNC; | |
b50ead57 | 399 | splx(s); |
66ad69d6 MT |
400 | break; |
401 | ||
402 | case FIONBIO: | |
403 | break; /* XXX remove */ | |
404 | ||
fc6972ae | 405 | /* return number of characters immediately available */ |
4b72e2f9 | 406 | case FIONREAD: |
2bf0f8a5 | 407 | *(int *)data = ttnread(tp); |
8062c8a7 | 408 | break; |
8062c8a7 | 409 | |
b968e450 SL |
410 | case TIOCOUTQ: |
411 | *(int *)data = tp->t_outq.c_cc; | |
412 | break; | |
413 | ||
a8d3bf7f | 414 | case TIOCSTOP: |
4f3a716e | 415 | s = spltty(); |
becb115c | 416 | if ((tp->t_state&TS_TTSTOP) == 0) { |
bfcf09ee | 417 | tp->t_state |= TS_TTSTOP; |
b50ead57 CT |
418 | #ifdef sun4c /* XXX */ |
419 | (*tp->t_stop)(tp, 0); | |
420 | #else | |
bfcf09ee | 421 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); |
b50ead57 | 422 | #endif |
bfcf09ee | 423 | } |
4b72e2f9 | 424 | splx(s); |
bfcf09ee BJ |
425 | break; |
426 | ||
a8d3bf7f | 427 | case TIOCSTART: |
4f3a716e | 428 | s = spltty(); |
2c6a4e11 | 429 | if ((tp->t_state&TS_TTSTOP) || (tp->t_lflag&FLUSHO)) { |
bfcf09ee | 430 | tp->t_state &= ~TS_TTSTOP; |
2c6a4e11 | 431 | tp->t_lflag &= ~FLUSHO; |
bfcf09ee BJ |
432 | ttstart(tp); |
433 | } | |
4b72e2f9 | 434 | splx(s); |
bfcf09ee BJ |
435 | break; |
436 | ||
8203fe05 SL |
437 | /* |
438 | * Simulate typing of a character at the terminal. | |
439 | */ | |
440 | case TIOCSTI: | |
3789a403 | 441 | if (p->p_ucred->cr_uid && (flag & FREAD) == 0) |
477d62ec | 442 | return (EPERM); |
3789a403 | 443 | if (p->p_ucred->cr_uid && !isctty(p, tp)) |
8203fe05 | 444 | return (EACCES); |
174ab115 | 445 | (*linesw[tp->t_line].l_rint)(*(u_char *)data, tp); |
8203fe05 SL |
446 | break; |
447 | ||
2c6a4e11 MT |
448 | case TIOCGETA: { |
449 | struct termios *t = (struct termios *)data; | |
450 | bcopy(&tp->t_termio, t, sizeof(struct termios)); | |
451 | if (tp->t_trace & TTRACE_STATE) | |
452 | ttytrace(com, tp); | |
453 | break; | |
454 | } | |
455 | ||
2c6a4e11 MT |
456 | if (com == TIOCSETAF || com == TIOCSETAFS) |
457 | ttywflush(tp); | |
458 | else { | |
459 | if (com == TIOCSETAW || com == TIOCSETAWS) | |
460 | ttywait(tp); | |
461 | if ((t->c_lflag&ICANON) != (tp->t_lflag&ICANON)) | |
462 | if (t->c_lflag&ICANON) { | |
463 | tp->t_lflag |= PENDIN; | |
464 | ttwakeup(tp); | |
465 | } | |
466 | else { | |
467 | struct clist tq; | |
468 | ||
469 | catq(&tp->t_rawq, &tp->t_canq); | |
470 | tq = tp->t_rawq; | |
471 | tp->t_rawq = tp->t_canq; | |
472 | tp->t_canq = tq; | |
473 | } | |
88a7a62a | 474 | } |
2c6a4e11 MT |
475 | tp->t_iflag = t->c_iflag; |
476 | tp->t_oflag = t->c_oflag; | |
477 | tp->t_lflag = t->c_lflag; | |
478 | bcopy(t->c_cc, tp->t_cc, sizeof(t->c_cc)); | |
479 | if (!soft) { | |
480 | tp->t_cflag = t->c_cflag; | |
481 | tp->t_ispeed = t->c_ispeed; | |
482 | tp->t_ospeed = t->c_ospeed; | |
88a7a62a | 483 | } |
e39f9ea6 MT |
484 | tp->t_iflag = t->c_iflag; |
485 | tp->t_oflag = t->c_oflag; | |
face72c1 MT |
486 | /* |
487 | * Make the EXTPROC bit read only. | |
488 | */ | |
489 | if (tp->t_lflag&EXTPROC) | |
490 | t->c_lflag |= EXTPROC; | |
491 | else | |
492 | t->c_lflag &= ~EXTPROC; | |
e39f9ea6 MT |
493 | tp->t_lflag = t->c_lflag; |
494 | bcopy(t->c_cc, tp->t_cc, sizeof(t->c_cc)); | |
88a7a62a | 495 | splx(s); |
2c6a4e11 MT |
496 | if (tp->t_trace & TTRACE_STATE) |
497 | ttytrace(com, tp); | |
88a7a62a SL |
498 | break; |
499 | } | |
500 | ||
4f3a716e | 501 | /* |
e39f9ea6 | 502 | * Set terminal process group. |
4f3a716e | 503 | */ |
245aeefa | 504 | case TIOCSPGRP: { |
e39f9ea6 MT |
505 | register struct pgrp *pgrp = pgfind(*(int *)data); |
506 | ||
232c0273 MT |
507 | if (!isctty(p, tp)) |
508 | return (ENOTTY); | |
fa4fb7b0 | 509 | else if (pgrp == NULL || pgrp->pg_session != p->p_session) |
232c0273 MT |
510 | return (EPERM); |
511 | tp->t_pgrp = pgrp; | |
88a7a62a | 512 | break; |
245aeefa | 513 | } |
88a7a62a SL |
514 | |
515 | case TIOCGPGRP: | |
3789a403 | 516 | if (!isctty(p, tp)) |
232c0273 | 517 | return (ENOTTY); |
500e26a6 | 518 | *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; |
88a7a62a SL |
519 | break; |
520 | ||
f9eea644 | 521 | case TIOCSWINSZ: |
245aeefa JB |
522 | if (bcmp((caddr_t)&tp->t_winsize, data, |
523 | sizeof (struct winsize))) { | |
f9eea644 | 524 | tp->t_winsize = *(struct winsize *)data; |
face72c1 | 525 | pgsignal(tp->t_pgrp, SIGWINCH, 1); |
f9eea644 JB |
526 | } |
527 | break; | |
528 | ||
529 | case TIOCGWINSZ: | |
530 | *(struct winsize *)data = tp->t_winsize; | |
531 | break; | |
532 | ||
adf4bc89 MK |
533 | case TIOCCONS: |
534 | if (*(int *)data) { | |
c0d5efb1 KM |
535 | if (constty && constty != tp && |
536 | (constty->t_state & (TS_CARR_ON|TS_ISOPEN)) == | |
537 | (TS_CARR_ON|TS_ISOPEN)) | |
adf4bc89 MK |
538 | return (EBUSY); |
539 | #ifndef UCONSOLE | |
3789a403 | 540 | if (error = suser(p->p_ucred, &p->p_acflag)) |
849cbd39 | 541 | return (error); |
adf4bc89 MK |
542 | #endif |
543 | constty = tp; | |
544 | } else if (tp == constty) | |
1eebc1a7 | 545 | constty = NULL; |
adf4bc89 MK |
546 | break; |
547 | ||
6cec2da2 MK |
548 | case TIOCDRAIN: |
549 | if (error = ttywait(tp)) | |
550 | return (error); | |
551 | break; | |
552 | ||
2c6a4e11 MT |
553 | /* allow old ioctls for now */ |
554 | case TIOCGETP: | |
555 | case TIOCSETP: | |
556 | case TIOCSETN: | |
557 | case TIOCGETC: | |
558 | case TIOCSETC: | |
559 | case TIOCSLTC: | |
560 | case TIOCGLTC: | |
561 | case TIOCLBIS: | |
562 | case TIOCLBIC: | |
563 | case TIOCLSET: | |
564 | case TIOCLGET: | |
565 | return(ottioctl(tp, com, data, flag)); | |
566 | ||
89dc6dfb | 567 | default: |
b50ead57 | 568 | #if defined(COMPAT_43) || defined(COMPAT_SUNOS) |
3789a403 MK |
569 | return (ttcompat(tp, com, data, flag)); |
570 | #else | |
fc6972ae | 571 | return (-1); |
3789a403 | 572 | #endif |
89dc6dfb | 573 | } |
fc6972ae | 574 | return (0); |
89dc6dfb | 575 | } |
e1d74936 | 576 | |
2c6a4e11 MT |
577 | /* |
578 | * DEBUG - to be removed | |
579 | */ | |
580 | ttytrace(ioc, tp) | |
581 | struct tty *tp; | |
582 | { | |
583 | register u_char *cc = tp->t_cc; | |
584 | char comm[MAXCOMLEN+1]; | |
585 | static int seq = 0; | |
586 | ||
587 | bcopy(u.u_comm, comm, MAXCOMLEN+1); | |
588 | comm[MAXCOMLEN] = '\0'; | |
589 | ||
590 | /* trace changes to line disciplines */ | |
591 | if (ioc == TIOCSETD) { | |
592 | log(LOG_LOCAL4|LOG_DEBUG, "%s:%x:%x:%x:%x\n", | |
593 | comm, ioc, u.u_procp->p_pid, tp->t_dev, tp->t_line); | |
594 | return; | |
595 | } | |
596 | ||
597 | /* | |
598 | * format for the trace record is: | |
599 | * | |
600 | * u_comm:ioctl:pid:dev_t:ldisc:iflag:oflag:lflag:cflag:ispeed: | |
601 | * ospeed:cc's...:seq | |
602 | * | |
603 | * u_comm is a string and all other values are hex. "cc's..." | |
604 | * stands for control chars 0 through NCC-1. seq is a sequence # | |
605 | * to force syslogd to log every entry (rather than hold them to | |
606 | * print "last message repeated...". | |
607 | */ | |
608 | 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", | |
609 | comm, ioc, u.u_procp->p_pid, tp->t_dev, tp->t_line, | |
610 | tp->t_iflag, tp->t_oflag, tp->t_lflag, tp->t_cflag, | |
611 | tp->t_ispeed, tp->t_ospeed, cc[0], cc[1], cc[2], cc[3], | |
612 | cc[4], cc[5], cc[6], cc[7], cc[8], cc[9], cc[10], cc[11], | |
613 | cc[12], cc[13], cc[14], cc[15], cc[16], cc[17], cc[18], | |
614 | cc[19], seq++); | |
615 | } | |
616 | ||
e1d74936 BJ |
617 | ttnread(tp) |
618 | struct tty *tp; | |
619 | { | |
620 | int nread = 0; | |
621 | ||
2c6a4e11 | 622 | if (tp->t_lflag & PENDIN) |
e1d74936 BJ |
623 | ttypend(tp); |
624 | nread = tp->t_canq.c_cc; | |
2c6a4e11 | 625 | if (tp->t_lflag & ICANON == 0) |
e1d74936 BJ |
626 | nread += tp->t_rawq.c_cc; |
627 | return (nread); | |
628 | } | |
629 | ||
77f9c500 | 630 | ttselect(dev, rw, p) |
e1d74936 | 631 | dev_t dev; |
941944c9 | 632 | int rw; |
77f9c500 | 633 | struct proc *p; |
e1d74936 BJ |
634 | { |
635 | register struct tty *tp = &cdevsw[major(dev)].d_ttys[minor(dev)]; | |
636 | int nread; | |
4f3a716e | 637 | int s = spltty(); |
e1d74936 | 638 | |
941944c9 | 639 | switch (rw) { |
e1d74936 BJ |
640 | |
641 | case FREAD: | |
642 | nread = ttnread(tp); | |
66ad69d6 | 643 | if (nread > 0 || |
09b836aa | 644 | ((tp->t_cflag&CLOCAL) == 0 && (tp->t_state&TS_CARR_ON) == 0)) |
941944c9 | 645 | goto win; |
77f9c500 | 646 | selrecord(p, &tp->t_rsel); |
941944c9 | 647 | break; |
e1d74936 | 648 | |
941944c9 | 649 | case FWRITE: |
e39f9ea6 | 650 | if (tp->t_outq.c_cc <= tp->t_lowat) |
941944c9 | 651 | goto win; |
77f9c500 | 652 | selrecord(p, &tp->t_wsel); |
941944c9 | 653 | break; |
e1d74936 | 654 | } |
941944c9 BJ |
655 | splx(s); |
656 | return (0); | |
657 | win: | |
658 | splx(s); | |
659 | return (1); | |
e1d74936 | 660 | } |
8bba2b8f | 661 | |
4147b3f6 | 662 | /* |
d554174a | 663 | * Initial open of tty, or (re)entry to standard tty line discipline. |
4147b3f6 BJ |
664 | */ |
665 | ttyopen(dev, tp) | |
4b72e2f9 SL |
666 | dev_t dev; |
667 | register struct tty *tp; | |
4147b3f6 | 668 | { |
b50ead57 | 669 | int s = spltty(); |
4147b3f6 | 670 | |
4147b3f6 | 671 | tp->t_dev = dev; |
e39f9ea6 | 672 | |
4147b3f6 | 673 | tp->t_state &= ~TS_WOPEN; |
4f3a716e MK |
674 | if ((tp->t_state & TS_ISOPEN) == 0) { |
675 | tp->t_state |= TS_ISOPEN; | |
f9eea644 | 676 | bzero((caddr_t)&tp->t_winsize, sizeof(tp->t_winsize)); |
2c6a4e11 MT |
677 | /* |
678 | * CHANGE: used to do a ttywflush() if it was the | |
679 | * old (old) line discipline. | |
680 | */ | |
4f3a716e | 681 | } |
b50ead57 | 682 | splx(s); |
fc6972ae | 683 | return (0); |
4147b3f6 BJ |
684 | } |
685 | ||
605d7712 MK |
686 | /* |
687 | * "close" a line discipline | |
688 | */ | |
adacc19e MT |
689 | ttylclose(tp, flag) |
690 | struct tty *tp; | |
691 | int flag; | |
605d7712 MK |
692 | { |
693 | ||
adacc19e MT |
694 | if (flag&IO_NDELAY) |
695 | ttyflush(tp, FREAD|FWRITE); | |
696 | else | |
697 | ttywflush(tp); | |
605d7712 MK |
698 | } |
699 | ||
4147b3f6 | 700 | /* |
d554174a MK |
701 | * Handle close() on a tty line: flush and set to initial state, |
702 | * bumping generation number so that pending read/write calls | |
703 | * can detect recycling of the tty. | |
4147b3f6 BJ |
704 | */ |
705 | ttyclose(tp) | |
4b72e2f9 | 706 | register struct tty *tp; |
4147b3f6 | 707 | { |
adf4bc89 MK |
708 | if (constty == tp) |
709 | constty = NULL; | |
605d7712 | 710 | ttyflush(tp, FREAD|FWRITE); |
232c0273 MT |
711 | tp->t_session = NULL; |
712 | tp->t_pgrp = NULL; | |
4147b3f6 | 713 | tp->t_state = 0; |
eea83fd3 | 714 | tp->t_gen++; |
09b836aa | 715 | return (0); |
4147b3f6 BJ |
716 | } |
717 | ||
605d7712 MK |
718 | /* |
719 | * Handle modem control transition on a tty. | |
720 | * Flag indicates new state of carrier. | |
721 | * Returns 0 if the line should be turned off, otherwise 1. | |
722 | */ | |
723 | ttymodem(tp, flag) | |
724 | register struct tty *tp; | |
b50ead57 | 725 | int flag; |
605d7712 MK |
726 | { |
727 | ||
2c6a4e11 | 728 | if ((tp->t_state&TS_WOPEN) == 0 && (tp->t_lflag & MDMBUF)) { |
605d7712 MK |
729 | /* |
730 | * MDMBUF: do flow control according to carrier flag | |
731 | */ | |
732 | if (flag) { | |
733 | tp->t_state &= ~TS_TTSTOP; | |
734 | ttstart(tp); | |
735 | } else if ((tp->t_state&TS_TTSTOP) == 0) { | |
736 | tp->t_state |= TS_TTSTOP; | |
b50ead57 CT |
737 | #ifdef sun4c /* XXX */ |
738 | (*tp->t_stop)(tp, 0); | |
739 | #else | |
605d7712 | 740 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); |
b50ead57 | 741 | #endif |
605d7712 MK |
742 | } |
743 | } else if (flag == 0) { | |
744 | /* | |
745 | * Lost carrier. | |
746 | */ | |
747 | tp->t_state &= ~TS_CARR_ON; | |
992909a0 MT |
748 | if (tp->t_state&TS_ISOPEN && (tp->t_cflag&CLOCAL) == 0) { |
749 | if (tp->t_session && tp->t_session->s_leader) | |
750 | psignal(tp->t_session->s_leader, SIGHUP); | |
751 | ttyflush(tp, FREAD|FWRITE); | |
752 | return (0); | |
605d7712 MK |
753 | } |
754 | } else { | |
755 | /* | |
756 | * Carrier now on. | |
757 | */ | |
758 | tp->t_state |= TS_CARR_ON; | |
66ad69d6 | 759 | ttwakeup(tp); |
605d7712 MK |
760 | } |
761 | return (1); | |
762 | } | |
763 | ||
e3f2038d MK |
764 | /* |
765 | * Default modem control routine (for other line disciplines). | |
766 | * Return argument flag, to turn off device on carrier drop. | |
767 | */ | |
2f54b5e8 MK |
768 | nullmodem(tp, flag) |
769 | register struct tty *tp; | |
e3f2038d MK |
770 | int flag; |
771 | { | |
772 | ||
773 | if (flag) | |
774 | tp->t_state |= TS_CARR_ON; | |
52004850 | 775 | else { |
e3f2038d | 776 | tp->t_state &= ~TS_CARR_ON; |
992909a0 MT |
777 | if ((tp->t_cflag&CLOCAL) == 0) { |
778 | if (tp->t_session && tp->t_session->s_leader) | |
779 | psignal(tp->t_session->s_leader, SIGHUP); | |
780 | return (0); | |
781 | } | |
52004850 | 782 | } |
992909a0 | 783 | return (1); |
e3f2038d MK |
784 | } |
785 | ||
4147b3f6 BJ |
786 | /* |
787 | * reinput pending characters after state switch | |
4f3a716e | 788 | * call at spltty(). |
4147b3f6 BJ |
789 | */ |
790 | ttypend(tp) | |
4b72e2f9 | 791 | register struct tty *tp; |
4147b3f6 BJ |
792 | { |
793 | struct clist tq; | |
794 | register c; | |
795 | ||
2c6a4e11 | 796 | tp->t_lflag &= ~PENDIN; |
becb115c | 797 | tp->t_state |= TS_TYPEN; |
4147b3f6 BJ |
798 | tq = tp->t_rawq; |
799 | tp->t_rawq.c_cc = 0; | |
800 | tp->t_rawq.c_cf = tp->t_rawq.c_cl = 0; | |
801 | while ((c = getc(&tq)) >= 0) | |
802 | ttyinput(c, tp); | |
becb115c | 803 | tp->t_state &= ~TS_TYPEN; |
4147b3f6 BJ |
804 | } |
805 | ||
806 | /* | |
d554174a | 807 | * Process input of a single character received on a tty. |
4147b3f6 BJ |
808 | */ |
809 | ttyinput(c, tp) | |
4b72e2f9 SL |
810 | register c; |
811 | register struct tty *tp; | |
4147b3f6 | 812 | { |
2c6a4e11 MT |
813 | register int iflag = tp->t_iflag; |
814 | register int lflag = tp->t_lflag; | |
815 | register u_char *cc = tp->t_cc; | |
816 | int i, err; | |
4147b3f6 | 817 | |
becb115c SL |
818 | /* |
819 | * If input is pending take it first. | |
820 | */ | |
2c6a4e11 | 821 | if (lflag&PENDIN) |
4147b3f6 | 822 | ttypend(tp); |
e39f9ea6 MT |
823 | /* |
824 | * Gather stats. | |
825 | */ | |
2c6a4e11 | 826 | |
4147b3f6 | 827 | tk_nin++; |
e39f9ea6 MT |
828 | if (lflag&ICANON) { |
829 | tk_cancc++; | |
830 | tp->t_cancc++; | |
831 | } else { | |
832 | tk_rawcc++; | |
833 | tp->t_rawcc++; | |
834 | } | |
becb115c | 835 | /* |
2c6a4e11 | 836 | * Handle exceptional conditions (break, parity, framing). |
becb115c | 837 | */ |
2c6a4e11 MT |
838 | if (err = (c&TTY_ERRORMASK)) { |
839 | c &= TTY_CHARMASK; | |
840 | if (err&TTY_FE && !c) { /* break */ | |
841 | if (iflag&IGNBRK) | |
842 | goto endcase; | |
843 | else if (iflag&BRKINT && lflag&ISIG && | |
844 | (cc[VINTR] != POSIX_V_DISABLE)) | |
845 | c = cc[VINTR]; | |
846 | else | |
847 | c = 0; | |
848 | } else if ((err&TTY_PE && iflag&INPCK) || err&TTY_FE) { | |
849 | if (iflag&IGNPAR) | |
850 | goto endcase; | |
851 | else if (iflag&PARMRK) { | |
852 | ttyinput(0377, tp); | |
853 | ttyinput(0, tp); | |
854 | } else | |
855 | c = 0; | |
4147b3f6 | 856 | } |
becb115c | 857 | } |
2c6a4e11 MT |
858 | dprintf("<%o>\n", c); |
859 | ||
860 | /* | |
861 | * In tandem mode, check high water mark. | |
862 | */ | |
863 | if (iflag&IXOFF) | |
864 | ttyblock(tp); | |
865 | ||
becb115c | 866 | /* |
e39f9ea6 | 867 | * In tandem mode, check high water mark. |
becb115c | 868 | */ |
2c6a4e11 | 869 | if ((tp->t_state&TS_TYPEN) == 0 && (iflag&ISTRIP)) |
d554174a | 870 | c &= ~0x80; |
2c6a4e11 MT |
871 | |
872 | /* | |
873 | * Extensions to POSIX input modes which aren't controlled | |
874 | * by ICANON, ISIG, or IXON. | |
875 | */ | |
876 | if (iflag&IEXTEN) { | |
877 | if (CCEQ(cc[VLNEXT],c) && (iflag&ISTRIP)) { | |
878 | if (lflag&ECHO) | |
879 | ttyout("^\b", tp); /*XXX - presumes too much */ | |
becb115c | 880 | } |
e6745ca3 MT |
881 | /* |
882 | * Signals. | |
883 | */ | |
884 | if (lflag&ISIG) { | |
885 | if (CCEQ(cc[VINTR], c) || CCEQ(cc[VQUIT], c)) { | |
886 | if ((lflag&NOFLSH) == 0) | |
887 | ttyflush(tp, FREAD|FWRITE); | |
4147b3f6 | 888 | ttyecho(c, tp); |
2c6a4e11 | 889 | tp->t_lflag |= FLUSHO; |
4147b3f6 | 890 | } |
e6745ca3 MT |
891 | if (CCEQ(cc[VSUSP], c)) { |
892 | if ((lflag&NOFLSH) == 0) | |
893 | ttyflush(tp, FREAD); | |
894 | ttyecho(c, tp); | |
895 | pgsignal(tp->t_pgrp, SIGTSTP, 1); | |
896 | goto endcase; | |
897 | } | |
becb115c | 898 | } |
2c6a4e11 MT |
899 | if (iflag&IXON) { |
900 | if (CCEQ(cc[VSTOP],c)) { | |
901 | if ((tp->t_state&TS_TTSTOP) == 0) { | |
902 | tp->t_state |= TS_TTSTOP; | |
903 | (*cdevsw[major(tp->t_dev)].d_stop)(tp, 0); | |
904 | return; | |
905 | } | |
906 | if (!CCEQ(cc[VSTART], c)) | |
907 | return; | |
908 | /* | |
909 | * if VSTART == VSTOP we toggle | |
910 | */ | |
911 | goto endcase; | |
becb115c | 912 | } |
2c6a4e11 MT |
913 | if (CCEQ(cc[VSTART], c)) |
914 | goto restartoutput; | |
becb115c | 915 | } |
2c6a4e11 MT |
916 | c = unputc(&tp->t_rawq); |
917 | } while (c != ' ' && c != '\t'); | |
918 | (void) putc(c, &tp->t_rawq); | |
919 | goto endcase; | |
920 | } | |
921 | /* | |
922 | * reprint line (^R) | |
923 | */ | |
924 | if (CCEQ(cc[VREPRINT], c)) { | |
925 | ttyretype(tp); | |
926 | goto endcase; | |
becb115c | 927 | } |
becb115c SL |
928 | /* |
929 | * Check for input buffer overflow | |
930 | */ | |
3789a403 | 931 | if (tp->t_rawq.c_cc + tp->t_canq.c_cc >= TTYHOG) { |
2c6a4e11 MT |
932 | if (iflag&IMAXBEL) { |
933 | if (tp->t_outq.c_cc < TTHIWAT(tp)) | |
934 | (void) ttyoutput(CTRL('g'), tp); | |
935 | } else | |
936 | ttyflush(tp, FREAD | FWRITE); | |
becb115c | 937 | goto endcase; |
7c9f96c0 | 938 | } |
becb115c SL |
939 | /* |
940 | * Put data char in q for user and | |
941 | * wakeup on seeing a line delimiter. | |
942 | */ | |
943 | if (putc(c, &tp->t_rawq) >= 0) { | |
3789a403 MK |
944 | if ((lflag&ICANON) == 0) { |
945 | ttwakeup(tp); | |
946 | ttyecho(c, tp); | |
947 | goto endcase; | |
948 | } | |
2c6a4e11 | 949 | if (ttbreakc(c)) { |
becb115c SL |
950 | tp->t_rocount = 0; |
951 | catq(&tp->t_rawq, &tp->t_canq); | |
4147b3f6 | 952 | ttwakeup(tp); |
becb115c SL |
953 | } else if (tp->t_rocount++ == 0) |
954 | tp->t_rocol = tp->t_col; | |
2c6a4e11 MT |
955 | if (CCEQ(cc[VQUOTE], c) && (iflag&ISTRIP)) |
956 | tp->t_state |= TS_QUOT; /* '\' escape */ | |
becb115c | 957 | if (tp->t_state&TS_ERASE) { |
e39f9ea6 MT |
958 | /* |
959 | * end of prterase \.../ | |
960 | */ | |
2c6a4e11 MT |
961 | /* |
962 | * end of prterase \.../ | |
963 | */ | |
becb115c SL |
964 | tp->t_state &= ~TS_ERASE; |
965 | (void) ttyoutput('/', tp); | |
966 | } | |
967 | i = tp->t_col; | |
4147b3f6 | 968 | ttyecho(c, tp); |
2c6a4e11 MT |
969 | if (CCEQ(cc[VEOF], c) && lflag&ECHO) { |
970 | /* | |
971 | * Place the cursor over the '^' of the ^D. | |
972 | */ | |
65ae7af4 | 973 | i = min(2, tp->t_col - i); |
becb115c SL |
974 | while (i > 0) { |
975 | (void) ttyoutput('\b', tp); | |
976 | i--; | |
977 | } | |
978 | } | |
4147b3f6 | 979 | } |
becb115c SL |
980 | endcase: |
981 | /* | |
2c6a4e11 | 982 | * IXANY means allow any character to restart output. |
becb115c | 983 | */ |
2c6a4e11 MT |
984 | if (tp->t_state&TS_TTSTOP && (iflag&IXANY == 0) |
985 | && cc[VSTART] != cc[VSTOP]) | |
4147b3f6 | 986 | return; |
2c6a4e11 | 987 | |
becb115c | 988 | restartoutput: |
4147b3f6 | 989 | tp->t_state &= ~TS_TTSTOP; |
2c6a4e11 | 990 | tp->t_lflag &= ~FLUSHO; |
becb115c | 991 | startoutput: |
4147b3f6 BJ |
992 | ttstart(tp); |
993 | } | |
994 | ||
995 | /* | |
d554174a MK |
996 | * Output a single character on a tty, doing output processing |
997 | * as needed (expanding tabs, newline processing, etc.). | |
998 | * Returns < 0 if putc succeeds, otherwise returns char to resend. | |
4147b3f6 BJ |
999 | * Must be recursive. |
1000 | */ | |
1001 | ttyoutput(c, tp) | |
1002 | register c; | |
1003 | register struct tty *tp; | |
1004 | { | |
d554174a | 1005 | register int col; |
2c6a4e11 MT |
1006 | if (!(tp->t_oflag&OPOST)) { |
1007 | if (tp->t_lflag&FLUSHO) | |
4147b3f6 BJ |
1008 | return (-1); |
1009 | if (putc(c, &tp->t_outq)) | |
4b72e2f9 | 1010 | return (c); |
4147b3f6 | 1011 | tk_nout++; |
e39f9ea6 | 1012 | tp->t_outcc++; |
4147b3f6 BJ |
1013 | return (-1); |
1014 | } | |
2c6a4e11 | 1015 | c &= 0377; |
4147b3f6 | 1016 | /* |
d554174a | 1017 | * Do tab expansion if OXTABS is set. |
face72c1 MT |
1018 | * Special case if we have external processing, we don't |
1019 | * do the tab expansion because we'll probably get it | |
1020 | * wrong. If tab expansion needs to be done, let it | |
1021 | * happen externally. | |
4147b3f6 | 1022 | */ |
2c6a4e11 | 1023 | if (c == '\t' && tp->t_oflag&OXTABS ) { |
4147b3f6 BJ |
1024 | register int s; |
1025 | ||
1026 | c = 8 - (tp->t_col&7); | |
2c6a4e11 | 1027 | if ((tp->t_lflag&FLUSHO) == 0) { |
4f3a716e | 1028 | s = spltty(); /* don't interrupt tabs */ |
4147b3f6 BJ |
1029 | c -= b_to_q(" ", c, &tp->t_outq); |
1030 | tk_nout += c; | |
e39f9ea6 | 1031 | tp->t_outcc += c; |
4147b3f6 BJ |
1032 | splx(s); |
1033 | } | |
1034 | tp->t_col += c; | |
1035 | return (c ? -1 : '\t'); | |
1036 | } | |
e39f9ea6 | 1037 | if (c == CEOT && oflag&ONOEOT) |
3789a403 | 1038 | return (-1); |
4147b3f6 | 1039 | tk_nout++; |
e39f9ea6 | 1040 | tp->t_outcc++; |
2c6a4e11 | 1041 | #ifdef notdef |
4147b3f6 | 1042 | /* |
d554174a MK |
1043 | * Newline translation: if ONLCR is set, |
1044 | * translate newline into "\r\n". | |
4147b3f6 | 1045 | */ |
2c6a4e11 | 1046 | #endif |
e39f9ea6 MT |
1047 | if ((tp->t_lflag&FLUSHO) == 0 && putc(c, &tp->t_outq)) |
1048 | return (c); | |
2c6a4e11 | 1049 | if ((tp->t_lflag&FLUSHO) == 0 && putc(c, &tp->t_outq)) |
4147b3f6 | 1050 | return (c); |
3789a403 | 1051 | |
d554174a MK |
1052 | col = tp->t_col; |
1053 | switch (CCLASS(c)) { | |
4147b3f6 BJ |
1054 | |
1055 | case ORDINARY: | |
d554174a | 1056 | col++; |
4147b3f6 BJ |
1057 | |
1058 | case CONTROL: | |
1059 | break; | |
1060 | ||
1061 | case BACKSPACE: | |
d554174a MK |
1062 | if (col > 0) |
1063 | col--; | |
4147b3f6 BJ |
1064 | break; |
1065 | ||
1066 | case NEWLINE: | |
d554174a | 1067 | col = 0; |
4147b3f6 BJ |
1068 | break; |
1069 | ||
1070 | case TAB: | |
d554174a | 1071 | col = (col + 8) &~ 0x7; |
4147b3f6 BJ |
1072 | break; |
1073 | ||
4147b3f6 | 1074 | case RETURN: |
d554174a | 1075 | col = 0; |
4147b3f6 | 1076 | } |
d554174a | 1077 | tp->t_col = col; |
4147b3f6 BJ |
1078 | return (-1); |
1079 | } | |
1080 | ||
1081 | /* | |
d554174a | 1082 | * Process a read call on a tty device. |
4147b3f6 | 1083 | */ |
66ad69d6 | 1084 | ttread(tp, uio, flag) |
4b72e2f9 | 1085 | register struct tty *tp; |
d6d7360b | 1086 | struct uio *uio; |
b50ead57 | 1087 | int flag; |
4147b3f6 BJ |
1088 | { |
1089 | register struct clist *qp; | |
2c6a4e11 MT |
1090 | register int c, t_flags; |
1091 | register long lflag = tp->t_lflag; | |
1092 | register long iflag = tp->t_iflag; | |
1093 | register u_char *cc = tp->t_cc; | |
875a1e2c | 1094 | int s, first, error = 0; |
4147b3f6 | 1095 | |
2c6a4e11 | 1096 | |
4147b3f6 | 1097 | loop: |
0f12c7be | 1098 | lflag = tp->t_lflag; |
66ad69d6 | 1099 | s = spltty(); |
becb115c | 1100 | /* |
66ad69d6 | 1101 | * take pending input first |
becb115c | 1102 | */ |
2c6a4e11 | 1103 | if (tp->t_lflag&PENDIN) |
4147b3f6 | 1104 | ttypend(tp); |
875a1e2c | 1105 | splx(s); |
09b836aa | 1106 | |
becb115c SL |
1107 | /* |
1108 | * Hang process if it's in the background. | |
1109 | */ | |
3789a403 MK |
1110 | if (isbackground(p, tp)) { |
1111 | if ((p->p_sigignore & sigmask(SIGTTIN)) || | |
1112 | (p->p_sigmask & sigmask(SIGTTIN)) || | |
1113 | p->p_flag&SPPWAIT || p->p_pgrp->pg_jobc == 0) | |
840510a3 | 1114 | return (EIO); |
3789a403 | 1115 | pgsignal(p->p_pgrp, SIGTTIN, 1); |
eea83fd3 MT |
1116 | if (error = ttysleep(tp, (caddr_t)&lbolt, TTIPRI | PCATCH, |
1117 | ttybg, 0)) | |
09b836aa | 1118 | return (error); |
58786a81 | 1119 | goto loop; |
4147b3f6 | 1120 | } |
09b836aa | 1121 | |
becb115c | 1122 | /* |
2c6a4e11 MT |
1123 | * If canonical, use the canonical queue, |
1124 | * else use the raw queue. | |
becb115c | 1125 | */ |
2c6a4e11 | 1126 | qp = lflag&ICANON ? &tp->t_canq : &tp->t_rawq; |
09b836aa | 1127 | |
becb115c | 1128 | /* |
09b836aa MK |
1129 | * If there is no input, sleep on rawq |
1130 | * awaiting hardware receipt and notification. | |
1131 | * If we have data, we don't need to check for carrier. | |
becb115c | 1132 | */ |
4f3a716e | 1133 | s = spltty(); |
becb115c | 1134 | if (qp->c_cc <= 0) { |
09b836aa MK |
1135 | int carrier; |
1136 | ||
1137 | carrier = (tp->t_state&TS_CARR_ON) || (tp->t_cflag&CLOCAL); | |
1138 | if (!carrier && tp->t_state&TS_ISOPEN) { | |
875a1e2c | 1139 | splx(s); |
09b836aa | 1140 | return (0); /* EOF */ |
4147b3f6 | 1141 | } |
c4ec2128 | 1142 | if (flag & IO_NDELAY) { |
66ad69d6 MT |
1143 | splx(s); |
1144 | return (EWOULDBLOCK); | |
1145 | } | |
eea83fd3 | 1146 | error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH, |
09b836aa | 1147 | carrier ? ttyin : ttopen, 0); |
875a1e2c | 1148 | splx(s); |
eea83fd3 | 1149 | if (error) |
09b836aa | 1150 | return (error); |
becb115c SL |
1151 | goto loop; |
1152 | } | |
875a1e2c | 1153 | splx(s); |
09b836aa | 1154 | |
becb115c | 1155 | /* |
2c6a4e11 | 1156 | * Input present, check for input mapping and processing. |
becb115c SL |
1157 | */ |
1158 | first = 1; | |
1159 | while ((c = getc(qp)) >= 0) { | |
becb115c | 1160 | /* |
2c6a4e11 | 1161 | * delayed suspend (^Y) |
becb115c | 1162 | */ |
2c6a4e11 | 1163 | if (CCEQ(cc[VDSUSP], c) && lflag&ISIG) { |
face72c1 | 1164 | pgsignal(tp->t_pgrp, SIGTSTP, 1); |
becb115c | 1165 | if (first) { |
eea83fd3 MT |
1166 | if (error = ttysleep(tp, (caddr_t)&lbolt, |
1167 | TTIPRI | PCATCH, ttybg, 0)) | |
09b836aa | 1168 | break; |
becb115c SL |
1169 | goto loop; |
1170 | } | |
1171 | break; | |
4147b3f6 | 1172 | } |
becb115c | 1173 | /* |
2c6a4e11 | 1174 | * Interpret EOF only in canonical mode. |
becb115c | 1175 | */ |
2c6a4e11 | 1176 | if (CCEQ(cc[VEOF], c) && lflag&ICANON) |
becb115c SL |
1177 | break; |
1178 | /* | |
1179 | * Give user character. | |
1180 | */ | |
2c6a4e11 | 1181 | error = ureadc(iflag&ISTRIP ? c & 0177 : c , uio); |
becb115c SL |
1182 | if (error) |
1183 | break; | |
9ec65acb | 1184 | if (uio->uio_resid == 0) |
becb115c SL |
1185 | break; |
1186 | /* | |
2c6a4e11 | 1187 | * In canonical mode check for a "break character" |
becb115c SL |
1188 | * marking the end of a "line of input". |
1189 | */ | |
2c6a4e11 | 1190 | if (lflag&ICANON && ttbreakc(c)) { |
becb115c | 1191 | break; |
2c6a4e11 | 1192 | } |
becb115c | 1193 | first = 0; |
4147b3f6 | 1194 | } |
becb115c SL |
1195 | /* |
1196 | * Look to unblock output now that (presumably) | |
1197 | * the input queue has gone down. | |
1198 | */ | |
b50ead57 | 1199 | s = spltty(); |
2c6a4e11 MT |
1200 | if (tp->t_state&TS_TBLOCK && tp->t_rawq.c_cc < TTYHOG/5) { |
1201 | if (cc[VSTART] != POSIX_V_DISABLE | |
1202 | && putc(cc[VSTART], &tp->t_outq) == 0) { | |
4147b3f6 BJ |
1203 | tp->t_state &= ~TS_TBLOCK; |
1204 | ttstart(tp); | |
1205 | } | |
2c6a4e11 | 1206 | } |
b50ead57 | 1207 | splx(s); |
e39f9ea6 | 1208 | } |
840510a3 | 1209 | return (error); |
4147b3f6 BJ |
1210 | } |
1211 | ||
605d7712 MK |
1212 | /* |
1213 | * Check the output queue on tp for space for a kernel message | |
1214 | * (from uprintf/tprintf). Allow some space over the normal | |
1215 | * hiwater mark so we don't lose messages due to normal flow | |
1216 | * control, but don't let the tty run amok. | |
ca9b16e5 MK |
1217 | * Sleeps here are not interruptible, but we return prematurely |
1218 | * if new signals come in. | |
605d7712 MK |
1219 | */ |
1220 | ttycheckoutq(tp, wait) | |
1221 | register struct tty *tp; | |
1222 | int wait; | |
1223 | { | |
ca9b16e5 | 1224 | int hiwat, s, oldsig; |
605d7712 | 1225 | |
e39f9ea6 | 1226 | hiwat = tp->t_hiwat; |
605d7712 | 1227 | s = spltty(); |
b50ead57 | 1228 | oldsig = wait ? curproc->p_sig : 0; |
605d7712 | 1229 | if (tp->t_outq.c_cc > hiwat + 200) |
fb1db32c MK |
1230 | while (tp->t_outq.c_cc > hiwat) { |
1231 | ttstart(tp); | |
3789a403 | 1232 | if (wait == 0 || curproc->p_sig != oldsig) { |
fb1db32c MK |
1233 | splx(s); |
1234 | return (0); | |
1235 | } | |
2bf0f8a5 CT |
1236 | timeout((void (*)__P((void *)))wakeup, |
1237 | (void *)&tp->t_outq, hz); | |
fb1db32c | 1238 | tp->t_state |= TS_ASLEEP; |
ca9b16e5 | 1239 | sleep((caddr_t)&tp->t_outq, PZERO - 1); |
605d7712 | 1240 | } |
605d7712 MK |
1241 | splx(s); |
1242 | return (1); | |
1243 | } | |
1244 | ||
4147b3f6 | 1245 | /* |
d554174a | 1246 | * Process a write call on a tty device. |
4147b3f6 | 1247 | */ |
66ad69d6 | 1248 | ttwrite(tp, uio, flag) |
4b72e2f9 | 1249 | register struct tty *tp; |
becb115c | 1250 | register struct uio *uio; |
b50ead57 | 1251 | int flag; |
4147b3f6 | 1252 | { |
4147b3f6 | 1253 | register char *cp; |
09b836aa | 1254 | register int cc = 0, ce; |
3789a403 | 1255 | register struct proc *p = curproc; |
becb115c | 1256 | int i, hiwat, cnt, error, s; |
4147b3f6 | 1257 | char obuf[OBUFSIZ]; |
4147b3f6 | 1258 | |
e39f9ea6 | 1259 | hiwat = tp->t_hiwat; |
becb115c SL |
1260 | cnt = uio->uio_resid; |
1261 | error = 0; | |
4147b3f6 | 1262 | loop: |
66ad69d6 | 1263 | s = spltty(); |
09b836aa | 1264 | if ((tp->t_state&TS_CARR_ON) == 0 && (tp->t_cflag&CLOCAL) == 0) { |
66ad69d6 MT |
1265 | if (tp->t_state&TS_ISOPEN) { |
1266 | splx(s); | |
1267 | return (EIO); | |
c4ec2128 | 1268 | } else if (flag & IO_NDELAY) { |
66ad69d6 | 1269 | splx(s); |
09b836aa MK |
1270 | error = EWOULDBLOCK; |
1271 | goto out; | |
66ad69d6 MT |
1272 | } else { |
1273 | /* | |
1274 | * sleep awaiting carrier | |
1275 | */ | |
eea83fd3 MT |
1276 | error = ttysleep(tp, (caddr_t)&tp->t_rawq, |
1277 | TTIPRI | PCATCH,ttopen, 0); | |
66ad69d6 | 1278 | splx(s); |
eea83fd3 | 1279 | if (error) |
09b836aa | 1280 | goto out; |
66ad69d6 MT |
1281 | goto loop; |
1282 | } | |
1283 | } | |
1284 | splx(s); | |
becb115c SL |
1285 | /* |
1286 | * Hang the process if it's in the background. | |
1287 | */ | |
3789a403 MK |
1288 | if (isbackground(p, tp) && |
1289 | tp->t_lflag&TOSTOP && (p->p_flag&SPPWAIT) == 0 && | |
1290 | (p->p_sigignore & sigmask(SIGTTOU)) == 0 && | |
1291 | (p->p_sigmask & sigmask(SIGTTOU)) == 0 && | |
1292 | p->p_pgrp->pg_jobc) { | |
1293 | pgsignal(p->p_pgrp, SIGTTOU, 1); | |
eea83fd3 MT |
1294 | if (error = ttysleep(tp, (caddr_t)&lbolt, TTIPRI | PCATCH, |
1295 | ttybg, 0)) | |
09b836aa | 1296 | goto out; |
93d2ecff | 1297 | goto loop; |
4147b3f6 | 1298 | } |
becb115c SL |
1299 | /* |
1300 | * Process the user's data in at most OBUFSIZ | |
09b836aa MK |
1301 | * chunks. Perform any output translation. |
1302 | * Keep track of high water mark, sleep on overflow | |
1303 | * awaiting device aid in acquiring new space. | |
becb115c | 1304 | */ |
09b836aa MK |
1305 | while (uio->uio_resid > 0 || cc > 0) { |
1306 | if (tp->t_lflag&FLUSHO) { | |
1307 | uio->uio_resid = 0; | |
1308 | return (0); | |
b482b2c8 | 1309 | } |
09b836aa MK |
1310 | if (tp->t_outq.c_cc > hiwat) |
1311 | goto ovhiwat; | |
becb115c | 1312 | /* |
09b836aa MK |
1313 | * Grab a hunk of data from the user, |
1314 | * unless we have some leftover from last time. | |
becb115c | 1315 | */ |
913ea2d1 | 1316 | if (cc == 0) { |
09b836aa MK |
1317 | cc = min(uio->uio_resid, OBUFSIZ); |
1318 | cp = obuf; | |
1319 | error = uiomove(cp, cc, uio); | |
1320 | if (error) { | |
1321 | cc = 0; | |
1322 | break; | |
1323 | } | |
913ea2d1 | 1324 | } |
2c6a4e11 | 1325 | #ifdef notdef |
becb115c SL |
1326 | /* |
1327 | * If nothing fancy need be done, grab those characters we | |
1328 | * can handle without any of ttyoutput's processing and | |
1329 | * just transfer them to the output q. For those chars | |
1330 | * which require special processing (as indicated by the | |
1331 | * bits in partab), call ttyoutput. After processing | |
1332 | * a hunk of data, look for FLUSHO so ^O's will take effect | |
1333 | * immediately. | |
1334 | */ | |
1335 | while (cc > 0) { | |
2c6a4e11 | 1336 | if (!(tp->t_oflag&OPOST)) |
4147b3f6 BJ |
1337 | ce = cc; |
1338 | else { | |
3f36033f | 1339 | ce = cc - scanc((unsigned)cc, (u_char *)cp, |
d554174a | 1340 | (u_char *)partab, CCLASSMASK); |
becb115c SL |
1341 | /* |
1342 | * If ce is zero, then we're processing | |
1343 | * a special character through ttyoutput. | |
1344 | */ | |
1345 | if (ce == 0) { | |
4147b3f6 BJ |
1346 | tp->t_rocount = 0; |
1347 | if (ttyoutput(*cp, tp) >= 0) { | |
93d2ecff JB |
1348 | /* no c-lists, wait a bit */ |
1349 | ttstart(tp); | |
eea83fd3 MT |
1350 | if (error = ttysleep(tp, |
1351 | (caddr_t)&lbolt, | |
1352 | TTOPRI | PCATCH, ttybuf, 0)) | |
09b836aa | 1353 | break; |
93d2ecff | 1354 | goto loop; |
4147b3f6 | 1355 | } |
becb115c | 1356 | cp++, cc--; |
2c6a4e11 | 1357 | if (tp->t_lflag&FLUSHO || |
becb115c | 1358 | tp->t_outq.c_cc > hiwat) |
4147b3f6 | 1359 | goto ovhiwat; |
becb115c | 1360 | continue; |
4147b3f6 BJ |
1361 | } |
1362 | } | |
becb115c SL |
1363 | /* |
1364 | * A bunch of normal characters have been found, | |
1365 | * transfer them en masse to the output queue and | |
1366 | * continue processing at the top of the loop. | |
1367 | * If there are any further characters in this | |
1368 | * <= OBUFSIZ chunk, the first should be a character | |
1369 | * requiring special handling by ttyoutput. | |
1370 | */ | |
4147b3f6 | 1371 | tp->t_rocount = 0; |
becb115c SL |
1372 | i = b_to_q(cp, ce, &tp->t_outq); |
1373 | ce -= i; | |
1374 | tp->t_col += ce; | |
1375 | cp += ce, cc -= ce, tk_nout += ce; | |
e39f9ea6 | 1376 | tp->t_outcc += ce; |
becb115c SL |
1377 | if (i > 0) { |
1378 | /* out of c-lists, wait a bit */ | |
4147b3f6 | 1379 | ttstart(tp); |
eea83fd3 MT |
1380 | if (error = ttysleep(tp, (caddr_t)&lbolt, |
1381 | TTOPRI | PCATCH, ttybuf, 0)) | |
09b836aa | 1382 | break; |
93d2ecff | 1383 | goto loop; |
4147b3f6 | 1384 | } |
2c6a4e11 | 1385 | if (tp->t_lflag&FLUSHO || tp->t_outq.c_cc > hiwat) |
09b836aa | 1386 | break; |
4147b3f6 | 1387 | } |
2c6a4e11 | 1388 | ttstart(tp); |
e39f9ea6 | 1389 | ttstart(tp); |
4147b3f6 | 1390 | } |
09b836aa MK |
1391 | out: |
1392 | /* | |
1393 | * If cc is nonzero, we leave the uio structure inconsistent, | |
1394 | * as the offset and iov pointers have moved forward, | |
1395 | * but it doesn't matter (the call will either return short | |
1396 | * or restart with a new uio). | |
1397 | */ | |
1398 | uio->uio_resid += cc; | |
840510a3 | 1399 | return (error); |
09b836aa | 1400 | |
4147b3f6 | 1401 | ovhiwat: |
b482b2c8 MK |
1402 | ttstart(tp); |
1403 | s = spltty(); | |
becb115c | 1404 | /* |
2c6a4e11 | 1405 | * This can only occur if FLUSHO is set in t_lflag, |
b482b2c8 | 1406 | * or if ttstart/oproc is synchronous (or very fast). |
becb115c | 1407 | */ |
4147b3f6 | 1408 | if (tp->t_outq.c_cc <= hiwat) { |
becb115c | 1409 | splx(s); |
4147b3f6 BJ |
1410 | goto loop; |
1411 | } | |
c4ec2128 | 1412 | if (flag & IO_NDELAY) { |
4f3a716e | 1413 | splx(s); |
09b836aa | 1414 | uio->uio_resid += cc; |
913ea2d1 | 1415 | if (uio->uio_resid == cnt) |
840510a3 BJ |
1416 | return (EWOULDBLOCK); |
1417 | return (0); | |
4147b3f6 BJ |
1418 | } |
1419 | tp->t_state |= TS_ASLEEP; | |
eea83fd3 | 1420 | error = ttysleep(tp, (caddr_t)&tp->t_outq, TTOPRI | PCATCH, ttyout, 0); |
becb115c | 1421 | splx(s); |
eea83fd3 | 1422 | if (error) |
09b836aa | 1423 | goto out; |
4147b3f6 BJ |
1424 | goto loop; |
1425 | } | |
1426 | ||
1427 | /* | |
1428 | * Rubout one character from the rawq of tp | |
1429 | * as cleanly as possible. | |
1430 | */ | |
1431 | ttyrub(c, tp) | |
4b72e2f9 SL |
1432 | register c; |
1433 | register struct tty *tp; | |
4147b3f6 BJ |
1434 | { |
1435 | register char *cp; | |
1436 | register int savecol; | |
1437 | int s; | |
1438 | char *nextc(); | |
1439 | ||
2c6a4e11 | 1440 | if ((tp->t_lflag&ECHO) == 0) |
4147b3f6 | 1441 | return; |
2c6a4e11 | 1442 | if (tp->t_lflag&ECHOE) { |
4147b3f6 BJ |
1443 | if (tp->t_rocount == 0) { |
1444 | /* | |
1445 | * Screwed by ttwrite; retype | |
1446 | */ | |
1447 | ttyretype(tp); | |
1448 | return; | |
1449 | } | |
2c6a4e11 | 1450 | /* if tab or newline was escaped - XXX - not 8bit */ |
e39f9ea6 | 1451 | if (c == ('\t'|TTY_QUOTE) || c == ('\n'|TTY_QUOTE)) |
4147b3f6 | 1452 | ttyrubo(tp, 2); |
d554174a | 1453 | else switch (CCLASS(c &= TTY_CHARMASK)) { |
4147b3f6 BJ |
1454 | |
1455 | case ORDINARY: | |
2c6a4e11 | 1456 | #ifdef notdef |
e39f9ea6 | 1457 | ttyrubo(tp, 1); |
4147b3f6 BJ |
1458 | break; |
1459 | ||
1460 | case VTAB: | |
1461 | case BACKSPACE: | |
1462 | case CONTROL: | |
1463 | case RETURN: | |
3789a403 | 1464 | case NEWLINE: |
2c6a4e11 | 1465 | if (tp->t_lflag&ECHOCTL) |
4147b3f6 BJ |
1466 | ttyrubo(tp, 2); |
1467 | break; | |
1468 | ||
e39f9ea6 MT |
1469 | case TAB: { |
1470 | int c; | |
1471 | ||
4147b3f6 BJ |
1472 | if (tp->t_rocount < tp->t_rawq.c_cc) { |
1473 | ttyretype(tp); | |
1474 | return; | |
1475 | } | |
4f3a716e | 1476 | s = spltty(); |
4147b3f6 | 1477 | savecol = tp->t_col; |
becb115c | 1478 | tp->t_state |= TS_CNTTB; |
2c6a4e11 | 1479 | tp->t_lflag |= FLUSHO; |
4147b3f6 | 1480 | tp->t_col = tp->t_rocol; |
becb115c | 1481 | cp = tp->t_rawq.c_cf; |
2c6a4e11 | 1482 | tp->t_lflag &= ~FLUSHO; |
becb115c | 1483 | tp->t_state &= ~TS_CNTTB; |
4147b3f6 BJ |
1484 | splx(s); |
1485 | /* | |
1486 | * savecol will now be length of the tab | |
1487 | */ | |
1488 | savecol -= tp->t_col; | |
1489 | tp->t_col += savecol; | |
1490 | if (savecol > 8) | |
1491 | savecol = 8; /* overflow screw */ | |
1492 | while (--savecol >= 0) | |
1493 | (void) ttyoutput('\b', tp); | |
1494 | break; | |
e39f9ea6 | 1495 | } |
4147b3f6 BJ |
1496 | |
1497 | default: | |
66ad69d6 | 1498 | /* XXX */ |
e39f9ea6 | 1499 | printf("ttyrub: would panic c = %d, val = %d\n", |
d554174a | 1500 | c, CCLASS(c)); |
e39f9ea6 | 1501 | /*panic("ttyrub");*/ |
4147b3f6 | 1502 | } |
2c6a4e11 | 1503 | } else if (tp->t_lflag&ECHOPRT) { |
becb115c | 1504 | if ((tp->t_state&TS_ERASE) == 0) { |
4147b3f6 | 1505 | (void) ttyoutput('\\', tp); |
becb115c | 1506 | tp->t_state |= TS_ERASE; |
4147b3f6 BJ |
1507 | } |
1508 | ttyecho(c, tp); | |
1509 | } else | |
2c6a4e11 | 1510 | ttyecho(tp->t_cc[VERASE], tp); |
4147b3f6 BJ |
1511 | tp->t_rocount--; |
1512 | } | |
1513 | ||
1514 | /* | |
1515 | * Crt back over cnt chars perhaps | |
1516 | * erasing them. | |
1517 | */ | |
1518 | ttyrubo(tp, cnt) | |
4b72e2f9 SL |
1519 | register struct tty *tp; |
1520 | int cnt; | |
4147b3f6 | 1521 | { |
2c6a4e11 | 1522 | register char *rubostring = tp->t_lflag&ECHOE ? "\b \b" : "\b"; |
4147b3f6 BJ |
1523 | |
1524 | while (--cnt >= 0) | |
09b836aa | 1525 | ttyoutstr("\b \b", tp); |
4147b3f6 BJ |
1526 | } |
1527 | ||
1528 | /* | |
1529 | * Reprint the rawq line. | |
1530 | * We assume c_cc has already been checked. | |
1531 | */ | |
1532 | ttyretype(tp) | |
4b72e2f9 | 1533 | register struct tty *tp; |
4147b3f6 BJ |
1534 | { |
1535 | register char *cp; | |
1536 | char *nextc(); | |
e39f9ea6 | 1537 | int s, c; |
4147b3f6 | 1538 | |
2c6a4e11 MT |
1539 | if (tp->t_cc[VREPRINT] != POSIX_V_DISABLE) |
1540 | ttyecho(tp->t_cc[VREPRINT], tp); | |
4147b3f6 | 1541 | (void) ttyoutput('\n', tp); |
4f3a716e | 1542 | s = spltty(); |
e39f9ea6 MT |
1543 | /*** XXX *** FIX *** NEXTC IS BROKEN - DOESN'T CHECK QUOTE |
1544 | BIT OF FIRST CHAR ****/ | |
1545 | for (cp = tp->t_canq.c_cf, c=(cp?*cp:0); cp; cp = nextc(&tp->t_canq, cp, &c)) { | |
1546 | ttyecho(c, tp); | |
1547 | } | |
1548 | for (cp = tp->t_rawq.c_cf, c=(cp?*cp:0); cp; cp = nextc(&tp->t_rawq, cp, &c)) { | |
1549 | ttyecho(c, tp); | |
1550 | } | |
becb115c | 1551 | tp->t_state &= ~TS_ERASE; |
4147b3f6 BJ |
1552 | splx(s); |
1553 | tp->t_rocount = tp->t_rawq.c_cc; | |
1554 | tp->t_rocol = 0; | |
1555 | } | |
1556 | ||
1557 | /* | |
2c6a4e11 | 1558 | * Echo a typed character to the terminal. |
4147b3f6 BJ |
1559 | */ |
1560 | ttyecho(c, tp) | |
4b72e2f9 SL |
1561 | register c; |
1562 | register struct tty *tp; | |
4147b3f6 | 1563 | { |
4147b3f6 | 1564 | c &= 0377; |
2c6a4e11 MT |
1565 | if ((tp->t_state&TS_CNTTB) == 0) |
1566 | tp->t_lflag &= ~FLUSHO; | |
1567 | if ((tp->t_lflag&ECHO) == 0 && !(tp->t_lflag&ECHONL && c == '\n')) | |
4147b3f6 | 1568 | return; |
2c6a4e11 | 1569 | if (tp->t_lflag&ECHOCTL) { |
09b836aa | 1570 | if ((c&TTY_CHARMASK) <= 037 && c != '\t' && c != '\n' || |
2abac043 | 1571 | (c&TTY_CHARMASK) == 0177) { |
4147b3f6 | 1572 | (void) ttyoutput('^', tp); |
e39f9ea6 | 1573 | c &= TTY_CHARMASK; |
4147b3f6 BJ |
1574 | if (c == 0177) |
1575 | c = '?'; | |
2c6a4e11 | 1576 | #ifdef notdef |
2c6a4e11 | 1577 | #endif |
4147b3f6 BJ |
1578 | else |
1579 | c += 'A' - 1; | |
1580 | } | |
1581 | } | |
e39f9ea6 | 1582 | (void) ttyoutput(c, tp); |
4147b3f6 BJ |
1583 | * send string cp to tp |
1584 | */ | |
09b836aa | 1585 | ttyoutstr(cp, tp) |
4b72e2f9 SL |
1586 | register char *cp; |
1587 | register struct tty *tp; | |
4147b3f6 BJ |
1588 | { |
1589 | register char c; | |
1590 | ||
1591 | while (c = *cp++) | |
1592 | (void) ttyoutput(c, tp); | |
1593 | } | |
1594 | ||
d554174a MK |
1595 | /* |
1596 | * Wake up any readers on a tty. | |
1597 | */ | |
4147b3f6 | 1598 | ttwakeup(tp) |
3789a403 | 1599 | register struct tty *tp; |
4147b3f6 BJ |
1600 | { |
1601 | ||
77f9c500 | 1602 | selwakeup(&tp->t_rsel); |
88a7a62a | 1603 | if (tp->t_state & TS_ASYNC) |
face72c1 | 1604 | pgsignal(tp->t_pgrp, SIGIO, 1); |
4147b3f6 BJ |
1605 | wakeup((caddr_t)&tp->t_rawq); |
1606 | } | |
e39f9ea6 | 1607 | |
6cec2da2 MK |
1608 | /* |
1609 | * Look up a code for a specified speed in a conversion table; | |
1610 | * used by drivers to map software speed values to hardware parameters. | |
1611 | */ | |
1612 | ttspeedtab(speed, table) | |
b50ead57 | 1613 | int speed; |
6cec2da2 MK |
1614 | register struct speedtab *table; |
1615 | { | |
1616 | ||
1617 | for ( ; table->sp_speed != -1; table++) | |
1618 | if (table->sp_speed == speed) | |
1619 | return (table->sp_code); | |
1620 | return (-1); | |
1621 | } | |
1622 | ||
e39f9ea6 MT |
1623 | /* |
1624 | * set tty hi and low water marks | |
1625 | * | |
1626 | * Try to arrange the dynamics so there's about one second | |
1627 | * from hi to low water. | |
1628 | * | |
1629 | */ | |
1630 | ttsetwater(tp) | |
1631 | struct tty *tp; | |
1632 | { | |
1633 | register cps = tp->t_ospeed / 10; | |
1634 | register x; | |
1635 | ||
1636 | #define clamp(x, h, l) ((x)>h ? h : ((x)<l) ? l : (x)) | |
1637 | tp->t_lowat = x = clamp(cps/2, TTMAXLOWAT, TTMINLOWAT); | |
1638 | x += cps; | |
1639 | x = clamp(x, TTMAXHIWAT, TTMINHIWAT); | |
1640 | tp->t_hiwat = roundup(x, CBSIZE); | |
1641 | #undef clamp | |
1642 | } | |
1643 | ||
52004850 | 1644 | /* |
52004850 MT |
1645 | * Report on state of foreground process group. |
1646 | */ | |
1647 | ttyinfo(tp) | |
91c77c3e | 1648 | register struct tty *tp; |
52004850 | 1649 | { |
91c77c3e | 1650 | register struct proc *p, *pick; |
9872d890 | 1651 | struct timeval utime, stime; |
91c77c3e | 1652 | int tmp; |
52004850 MT |
1653 | |
1654 | if (ttycheckoutq(tp,0) == 0) | |
1655 | return; | |
91c77c3e KB |
1656 | |
1657 | /* Print load average. */ | |
ea853f5f | 1658 | tmp = (averunnable.ldavg[0] * 100 + FSCALE / 2) >> FSHIFT; |
91c77c3e KB |
1659 | ttyprintf(tp, "load: %d.%02d ", tmp / 100, tmp % 100); |
1660 | ||
232c0273 | 1661 | if (tp->t_session == NULL) |
91c77c3e | 1662 | ttyprintf(tp, "not a controlling terminal\n"); |
9872d890 | 1663 | else if (tp->t_pgrp == NULL) |
91c77c3e | 1664 | ttyprintf(tp, "no foreground process group\n"); |
9872d890 | 1665 | else if ((p = tp->t_pgrp->pg_mem) == NULL) |
91c77c3e | 1666 | ttyprintf(tp, "empty foreground process group\n"); |
52004850 | 1667 | else { |
91c77c3e KB |
1668 | /* Pick interesting process. */ |
1669 | for (pick = NULL; p != NULL; p = p->p_pgrpnxt) | |
9872d890 MT |
1670 | if (proc_compare(pick, p)) |
1671 | pick = p; | |
91c77c3e KB |
1672 | |
1673 | ttyprintf(tp, " cmd: %s %d [%s] ", pick->p_comm, pick->p_pid, | |
1674 | pick->p_stat == SRUN ? "running" : | |
1675 | pick->p_wmesg ? pick->p_wmesg : "iowait"); | |
1676 | ||
2bf0f8a5 | 1677 | calcru(pick, &utime, &stime, NULL); |
9872d890 | 1678 | |
91c77c3e KB |
1679 | /* Print user time. */ |
1680 | ttyprintf(tp, "%d.%02du ", | |
1681 | utime.tv_sec, (utime.tv_usec + 5000) / 10000); | |
9872d890 | 1682 | |
91c77c3e KB |
1683 | /* Print system time. */ |
1684 | ttyprintf(tp, "%d.%02ds ", | |
1685 | stime.tv_sec, (stime.tv_usec + 5000) / 10000); | |
1686 | ||
1687 | #define pgtok(a) (((a) * NBPG) / 1024) | |
1688 | /* Print percentage cpu, resident set size. */ | |
1689 | tmp = pick->p_pctcpu * 10000 + FSCALE / 2 >> FSHIFT; | |
1690 | ttyprintf(tp, "%d%% %dk\n", | |
b50ead57 CT |
1691 | tmp / 100, |
1692 | pick->p_stat == SIDL || pick->p_stat == SZOMB ? 0 : | |
1693 | pgtok(pick->p_vmspace->vm_rssize)); | |
52004850 | 1694 | } |
91c77c3e | 1695 | tp->t_rocount = 0; /* so pending input will be retyped if BS */ |
52004850 MT |
1696 | } |
1697 | ||
9872d890 MT |
1698 | /* |
1699 | * Returns 1 if p2 is "better" than p1 | |
1700 | * | |
1701 | * The algorithm for picking the "interesting" process is thus: | |
1702 | * | |
1703 | * 1) (Only foreground processes are eligable - implied) | |
1704 | * 2) Runnable processes are favored over anything | |
1705 | * else. The runner with the highest cpu | |
1706 | * utilization is picked (p_cpu). Ties are | |
1707 | * broken by picking the highest pid. | |
1708 | * 3 Next, the sleeper with the shortest sleep | |
1709 | * time is favored. With ties, we pick out | |
1710 | * just "short-term" sleepers (SSINTR == 0). | |
1711 | * Further ties are broken by picking the highest | |
1712 | * pid. | |
1713 | * | |
1714 | */ | |
1715 | #define isrun(p) (((p)->p_stat == SRUN) || ((p)->p_stat == SIDL)) | |
9ca8548a KM |
1716 | #define TESTAB(a, b) ((a)<<1 | (b)) |
1717 | #define ONLYA 2 | |
1718 | #define ONLYB 1 | |
1719 | #define BOTH 3 | |
1720 | ||
91c77c3e | 1721 | static int |
9872d890 MT |
1722 | proc_compare(p1, p2) |
1723 | register struct proc *p1, *p2; | |
1724 | { | |
1725 | ||
1726 | if (p1 == NULL) | |
1727 | return (1); | |
1728 | /* | |
1729 | * see if at least one of them is runnable | |
1730 | */ | |
9ca8548a KM |
1731 | switch (TESTAB(isrun(p1), isrun(p2))) { |
1732 | case ONLYA: | |
9872d890 | 1733 | return (0); |
9ca8548a KM |
1734 | case ONLYB: |
1735 | return (1); | |
1736 | case BOTH: | |
9872d890 MT |
1737 | /* |
1738 | * tie - favor one with highest recent cpu utilization | |
1739 | */ | |
1740 | if (p2->p_cpu > p1->p_cpu) | |
1741 | return (1); | |
1742 | if (p1->p_cpu > p2->p_cpu) | |
1743 | return (0); | |
1744 | return (p2->p_pid > p1->p_pid); /* tie - return highest pid */ | |
1745 | } | |
9ca8548a KM |
1746 | /* |
1747 | * weed out zombies | |
1748 | */ | |
1749 | switch (TESTAB(p1->p_stat == SZOMB, p2->p_stat == SZOMB)) { | |
1750 | case ONLYA: | |
1751 | return (1); | |
1752 | case ONLYB: | |
1753 | return (0); | |
1754 | case BOTH: | |
1755 | return (p2->p_pid > p1->p_pid); /* tie - return highest pid */ | |
1756 | } | |
9872d890 MT |
1757 | /* |
1758 | * pick the one with the smallest sleep time | |
1759 | */ | |
1760 | if (p2->p_slptime > p1->p_slptime) | |
1761 | return (0); | |
1762 | if (p1->p_slptime > p2->p_slptime) | |
1763 | return (1); | |
1764 | /* | |
1765 | * favor one sleeping in a non-interruptible sleep | |
1766 | */ | |
1767 | if (p1->p_flag&SSINTR && (p2->p_flag&SSINTR) == 0) | |
1768 | return (1); | |
1769 | if (p2->p_flag&SSINTR && (p1->p_flag&SSINTR) == 0) | |
1770 | return (0); | |
3789a403 | 1771 | return (p2->p_pid > p1->p_pid); /* tie - return highest pid */ |
9872d890 | 1772 | } |
9ca8548a | 1773 | |
232c0273 MT |
1774 | /* |
1775 | * Output char to tty; console putchar style. | |
1776 | */ | |
1777 | tputchar(c, tp) | |
1778 | int c; | |
1779 | struct tty *tp; | |
1780 | { | |
1781 | register s = spltty(); | |
1782 | ||
3789a403 | 1783 | if ((tp->t_state & (TS_CARR_ON|TS_ISOPEN)) == (TS_CARR_ON|TS_ISOPEN)) { |
232c0273 MT |
1784 | if (c == '\n') |
1785 | (void) ttyoutput('\r', tp); | |
1786 | (void) ttyoutput(c, tp); | |
1787 | ttstart(tp); | |
1788 | splx(s); | |
1789 | return (0); | |
1790 | } | |
1791 | splx(s); | |
1792 | return (-1); | |
52004850 | 1793 | } |
eea83fd3 | 1794 | |
e6745ca3 | 1795 | /* |
d554174a MK |
1796 | * Sleep on chan, returning ERESTART if tty changed |
1797 | * while we napped and returning any errors (e.g. EINTR/ETIMEDOUT) | |
1798 | * reported by tsleep. If the tty is revoked, restarting a pending | |
1799 | * call will redo validation done at the start of the call. | |
e6745ca3 | 1800 | */ |
eea83fd3 MT |
1801 | ttysleep(tp, chan, pri, wmesg, timo) |
1802 | struct tty *tp; | |
1803 | caddr_t chan; | |
1804 | int pri; | |
1805 | char *wmesg; | |
1806 | int timo; | |
1807 | { | |
1808 | int error; | |
1809 | short gen = tp->t_gen; | |
1810 | ||
1811 | if (error = tsleep(chan, pri, wmesg, timo)) | |
1812 | return (error); | |
1813 | if (tp->t_gen != gen) | |
1814 | return (ERESTART); | |
1815 | return (0); | |
1816 | } |