Commit | Line | Data |
---|---|---|
da7c5cc6 | 1 | /* |
fccd027d KB |
2 | * Copyright (c) 1982, 1986, 1989 The Regents of the University of California. |
3 | * All rights reserved. | |
da7c5cc6 | 4 | * |
dbf0c423 | 5 | * %sccs.include.redist.c% |
fccd027d | 6 | * |
88b2ff48 | 7 | * @(#)tty_pty.c 7.17 (Berkeley) %G% |
da7c5cc6 | 8 | */ |
be4367b3 | 9 | |
45372428 MT |
10 | /* |
11 | * Pseudo-teletype Driver | |
12 | * (Actually two drivers, requiring two entries in 'cdevsw') | |
45372428 | 13 | */ |
647d645f MT |
14 | #include "pty.h" |
15 | ||
f12183e4 | 16 | #if NPTY > 0 |
94368568 JB |
17 | #include "param.h" |
18 | #include "systm.h" | |
19 | #include "ioctl.h" | |
20 | #include "tty.h" | |
94368568 JB |
21 | #include "user.h" |
22 | #include "conf.h" | |
23 | #include "file.h" | |
24 | #include "proc.h" | |
25 | #include "uio.h" | |
26 | #include "kernel.h" | |
c4ec2128 | 27 | #include "vnode.h" |
6a5ca8a0 | 28 | #include "tsleep.h" |
941944c9 | 29 | |
b3c8737d | 30 | #if NPTY == 1 |
5bb90914 | 31 | #undef NPTY |
c91c01fe | 32 | #define NPTY 32 /* crude XXX */ |
b3c8737d | 33 | #endif |
45372428 | 34 | |
2bb0bef9 | 35 | #define BUFSIZ 100 /* Chunk size iomoved to/from user */ |
e1d74936 | 36 | |
45372428 | 37 | /* |
5bb90914 JB |
38 | * pts == /dev/tty[pqrs]? |
39 | * ptc == /dev/pty[pqrs]? | |
45372428 | 40 | */ |
e1d74936 BJ |
41 | struct tty pt_tty[NPTY]; |
42 | struct pt_ioctl { | |
1a954a11 | 43 | int pt_flags; |
1a954a11 | 44 | struct proc *pt_selr, *pt_selw; |
5bb90914 JB |
45 | u_char pt_send; |
46 | u_char pt_ucntl; | |
6a5ca8a0 | 47 | struct clist pt_ioc; |
e1d74936 | 48 | } pt_ioctl[NPTY]; |
5bb90914 | 49 | int npty = NPTY; /* for pstat -t */ |
45372428 | 50 | |
e9fe78f8 MT |
51 | int ptydebug = 0; |
52 | ||
6a5ca8a0 KM |
53 | #define PF_RCOLL 0x0001 |
54 | #define PF_WCOLL 0x0002 | |
55 | #define PF_NBIO 0x0004 | |
56 | #define PF_PKT 0x0008 /* packet mode */ | |
57 | #define PF_STOPPED 0x0010 /* user told stopped */ | |
58 | #define PF_REMOTE 0x0020 /* remote and flow controlled input */ | |
59 | #define PF_NOSTOP 0x0040 | |
60 | #define PF_UCNTL 0x0080 /* user control mode */ | |
61 | #define PF_TIOC 0x0100 /* transparent control mode */ | |
62 | #define PF_LIOC 0x0200 /* transparent control locked */ | |
63 | #define PF_WIOC 0x0400 /* waiting for PF_LIOC to clear */ | |
64 | #define PF_BLOCK 0x0800 /* block writes to slave */ | |
65 | #define PF_OWAIT 0x1000 /* waiting for PF_BLOCK to clear */ | |
45372428 MT |
66 | |
67 | /*ARGSUSED*/ | |
68 | ptsopen(dev, flag) | |
73c77d38 | 69 | dev_t dev; |
e1d74936 | 70 | { |
45372428 | 71 | register struct tty *tp; |
5bb90914 | 72 | int error; |
45372428 | 73 | |
5bb90914 JB |
74 | #ifdef lint |
75 | npty = npty; | |
76 | #endif | |
f21c8fb8 BJ |
77 | if (minor(dev) >= NPTY) |
78 | return (ENXIO); | |
45372428 | 79 | tp = &pt_tty[minor(dev)]; |
941944c9 | 80 | if ((tp->t_state & TS_ISOPEN) == 0) { |
7595f992 | 81 | tp->t_state |= TS_WOPEN; |
bdda6b91 | 82 | ttychars(tp); /* Set up default chars */ |
e39f9ea6 MT |
83 | tp->t_iflag = TTYDEF_IFLAG; |
84 | tp->t_oflag = TTYDEF_OFLAG; | |
85 | tp->t_lflag = TTYDEF_LFLAG; | |
86 | tp->t_cflag = TTYDEF_CFLAG; | |
87 | tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED; | |
88 | ttsetwater(tp); /* would be done in xxparam() */ | |
f21c8fb8 BJ |
89 | } else if (tp->t_state&TS_XCLUDE && u.u_uid != 0) |
90 | return (EBUSY); | |
e1d74936 | 91 | if (tp->t_oproc) /* Ctrlr still around. */ |
941944c9 BJ |
92 | tp->t_state |= TS_CARR_ON; |
93 | while ((tp->t_state & TS_CARR_ON) == 0) { | |
94 | tp->t_state |= TS_WOPEN; | |
e9fe78f8 MT |
95 | if (flag&FNDELAY) |
96 | break; | |
7595f992 | 97 | if (error = ttysleep(tp, (caddr_t)&tp->t_rawq, TTIPRI | PCATCH, |
9a418eca MK |
98 | ttopen, 0)) |
99 | return (error); | |
45372428 | 100 | } |
e9fe78f8 | 101 | error = (*linesw[tp->t_line].l_open)(dev, tp, flag); |
5bb90914 JB |
102 | ptcwakeup(tp, FREAD|FWRITE); |
103 | return (error); | |
45372428 MT |
104 | } |
105 | ||
106 | ptsclose(dev) | |
73c77d38 | 107 | dev_t dev; |
941944c9 | 108 | { |
45372428 MT |
109 | register struct tty *tp; |
110 | ||
111 | tp = &pt_tty[minor(dev)]; | |
112 | (*linesw[tp->t_line].l_close)(tp); | |
4b39cb77 | 113 | ttyclose(tp); |
5bb90914 | 114 | ptcwakeup(tp, FREAD|FWRITE); |
6a5ca8a0 | 115 | return (0); |
45372428 MT |
116 | } |
117 | ||
e9fe78f8 | 118 | ptsread(dev, uio, flag) |
73c77d38 | 119 | dev_t dev; |
ae9a0a69 | 120 | struct uio *uio; |
e1d74936 | 121 | { |
defdbcd1 BJ |
122 | register struct tty *tp = &pt_tty[minor(dev)]; |
123 | register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; | |
840510a3 | 124 | int error = 0; |
defdbcd1 BJ |
125 | |
126 | again: | |
127 | if (pti->pt_flags & PF_REMOTE) { | |
4cdee751 | 128 | while (isbackground(u.u_procp, tp)) { |
5bb90914 JB |
129 | if ((u.u_procp->p_sigignore & sigmask(SIGTTIN)) || |
130 | (u.u_procp->p_sigmask & sigmask(SIGTTIN)) || | |
4cdee751 | 131 | u.u_procp->p_pgrp->pg_jobc == 0 || |
defdbcd1 | 132 | u.u_procp->p_flag&SVFORK) |
840510a3 | 133 | return (EIO); |
58e0cf90 | 134 | pgsignal(u.u_procp->p_pgrp, SIGTTIN, 1); |
7595f992 MT |
135 | if (error = ttysleep(tp, (caddr_t)&lbolt, |
136 | TTIPRI | PCATCH, ttybg, 0)) | |
9a418eca | 137 | return (error); |
941944c9 | 138 | } |
5bb90914 | 139 | if (tp->t_canq.c_cc == 0) { |
c4ec2128 | 140 | if (flag & IO_NDELAY) |
840510a3 | 141 | return (EWOULDBLOCK); |
7595f992 | 142 | if (error = ttysleep(tp, (caddr_t)&tp->t_canq, |
9a418eca MK |
143 | TTIPRI | PCATCH, ttyin, 0)) |
144 | return (error); | |
defdbcd1 BJ |
145 | goto again; |
146 | } | |
5bb90914 JB |
147 | while (tp->t_canq.c_cc > 1 && uio->uio_resid > 0) |
148 | if (ureadc(getc(&tp->t_canq), uio) < 0) { | |
840510a3 | 149 | error = EFAULT; |
ae9a0a69 BJ |
150 | break; |
151 | } | |
5bb90914 JB |
152 | if (tp->t_canq.c_cc == 1) |
153 | (void) getc(&tp->t_canq); | |
154 | if (tp->t_canq.c_cc) | |
840510a3 | 155 | return (error); |
defdbcd1 BJ |
156 | } else |
157 | if (tp->t_oproc) | |
e9fe78f8 | 158 | error = (*linesw[tp->t_line].l_read)(tp, uio, flag); |
5bb90914 | 159 | ptcwakeup(tp, FWRITE); |
840510a3 | 160 | return (error); |
45372428 MT |
161 | } |
162 | ||
941944c9 BJ |
163 | /* |
164 | * Write to pseudo-tty. | |
165 | * Wakeups of controlling tty will happen | |
166 | * indirectly, when tty driver calls ptsstart. | |
167 | */ | |
e9fe78f8 | 168 | ptswrite(dev, uio, flag) |
73c77d38 | 169 | dev_t dev; |
ae9a0a69 | 170 | struct uio *uio; |
e1d74936 | 171 | { |
6a5ca8a0 KM |
172 | register struct tty *tp = &pt_tty[minor(dev)]; |
173 | register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; | |
45372428 | 174 | |
840510a3 BJ |
175 | if (tp->t_oproc == 0) |
176 | return (EIO); | |
6a5ca8a0 KM |
177 | |
178 | while (pti->pt_flags & PF_BLOCK) { | |
179 | pti->pt_flags |= PF_OWAIT; | |
180 | sleep((caddr_t)pti + 1, TTOPRI); | |
181 | } | |
182 | ||
e9fe78f8 | 183 | return ((*linesw[tp->t_line].l_write)(tp, uio, flag)); |
45372428 MT |
184 | } |
185 | ||
941944c9 BJ |
186 | /* |
187 | * Start output on pseudo-tty. | |
188 | * Wake up process selecting or sleeping for input from controlling tty. | |
189 | */ | |
45372428 | 190 | ptsstart(tp) |
e1d74936 BJ |
191 | struct tty *tp; |
192 | { | |
1e6d24b1 | 193 | register struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; |
e1d74936 | 194 | |
941944c9 | 195 | if (tp->t_state & TS_TTSTOP) |
45372428 | 196 | return; |
1e6d24b1 BJ |
197 | if (pti->pt_flags & PF_STOPPED) { |
198 | pti->pt_flags &= ~PF_STOPPED; | |
199 | pti->pt_send = TIOCPKT_START; | |
200 | } | |
5bb90914 | 201 | ptcwakeup(tp, FREAD); |
d427b3b2 BJ |
202 | } |
203 | ||
5bb90914 | 204 | ptcwakeup(tp, flag) |
d427b3b2 BJ |
205 | struct tty *tp; |
206 | { | |
207 | struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; | |
208 | ||
5bb90914 JB |
209 | if (flag & FREAD) { |
210 | if (pti->pt_selr) { | |
211 | selwakeup(pti->pt_selr, pti->pt_flags & PF_RCOLL); | |
212 | pti->pt_selr = 0; | |
213 | pti->pt_flags &= ~PF_RCOLL; | |
214 | } | |
215 | wakeup((caddr_t)&tp->t_outq.c_cf); | |
216 | } | |
217 | if (flag & FWRITE) { | |
218 | if (pti->pt_selw) { | |
219 | selwakeup(pti->pt_selw, pti->pt_flags & PF_WCOLL); | |
220 | pti->pt_selw = 0; | |
221 | pti->pt_flags &= ~PF_WCOLL; | |
222 | } | |
e9fe78f8 | 223 | if (ptydebug) printf("WAKEUP c_cf %d\n", u.u_procp->p_pid); |
5bb90914 | 224 | wakeup((caddr_t)&tp->t_rawq.c_cf); |
e1d74936 | 225 | } |
45372428 MT |
226 | } |
227 | ||
228 | /*ARGSUSED*/ | |
229 | ptcopen(dev, flag) | |
e1d74936 BJ |
230 | dev_t dev; |
231 | int flag; | |
232 | { | |
45372428 | 233 | register struct tty *tp; |
1a954a11 | 234 | struct pt_ioctl *pti; |
45372428 | 235 | |
f21c8fb8 BJ |
236 | if (minor(dev) >= NPTY) |
237 | return (ENXIO); | |
45372428 | 238 | tp = &pt_tty[minor(dev)]; |
f21c8fb8 BJ |
239 | if (tp->t_oproc) |
240 | return (EIO); | |
e1d74936 | 241 | tp->t_oproc = ptsstart; |
f2f3b49b | 242 | (void)(*linesw[tp->t_line].l_modem)(tp, 1); |
44ce8f01 | 243 | tp->t_lflag &= ~EXTPROC; |
1a954a11 BJ |
244 | pti = &pt_ioctl[minor(dev)]; |
245 | pti->pt_flags = 0; | |
246 | pti->pt_send = 0; | |
5bb90914 | 247 | pti->pt_ucntl = 0; |
f21c8fb8 | 248 | return (0); |
45372428 MT |
249 | } |
250 | ||
251 | ptcclose(dev) | |
e1d74936 BJ |
252 | dev_t dev; |
253 | { | |
45372428 MT |
254 | register struct tty *tp; |
255 | ||
256 | tp = &pt_tty[minor(dev)]; | |
f2f3b49b | 257 | (void)(*linesw[tp->t_line].l_modem)(tp, 0); |
d3be7d55 | 258 | tp->t_state &= ~TS_CARR_ON; |
e1d74936 | 259 | tp->t_oproc = 0; /* mark closed */ |
bc8d7925 | 260 | tp->t_session = 0; |
6a5ca8a0 | 261 | return (0); |
45372428 MT |
262 | } |
263 | ||
e9fe78f8 | 264 | ptcread(dev, uio, flag) |
1a954a11 | 265 | dev_t dev; |
ae9a0a69 | 266 | struct uio *uio; |
e1d74936 | 267 | { |
840510a3 | 268 | register struct tty *tp = &pt_tty[minor(dev)]; |
5bb90914 | 269 | struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; |
2bb0bef9 SL |
270 | char buf[BUFSIZ]; |
271 | int error = 0, cc; | |
45372428 | 272 | |
5bb90914 JB |
273 | /* |
274 | * We want to block until the slave | |
275 | * is open, and there's something to read; | |
276 | * but if we lost the slave or we're NBIO, | |
277 | * then return the appropriate error instead. | |
278 | */ | |
279 | for (;;) { | |
280 | if (tp->t_state&TS_ISOPEN) { | |
281 | if (pti->pt_flags&PF_PKT && pti->pt_send) { | |
8011f5df | 282 | error = ureadc((int)pti->pt_send, uio); |
5bb90914 JB |
283 | if (error) |
284 | return (error); | |
44ce8f01 MT |
285 | if (pti->pt_send & TIOCPKT_IOCTL) { |
286 | cc = MIN(uio->uio_resid, | |
287 | sizeof(tp->t_termios)); | |
288 | uiomove(&tp->t_termios, cc, uio); | |
289 | } | |
5bb90914 JB |
290 | pti->pt_send = 0; |
291 | return (0); | |
292 | } | |
293 | if (pti->pt_flags&PF_UCNTL && pti->pt_ucntl) { | |
8011f5df | 294 | error = ureadc((int)pti->pt_ucntl, uio); |
5bb90914 JB |
295 | if (error) |
296 | return (error); | |
297 | pti->pt_ucntl = 0; | |
298 | return (0); | |
299 | } | |
6a5ca8a0 KM |
300 | if (pti->pt_flags&PF_TIOC && pti->pt_ioc.c_cc) { |
301 | if (uio->uio_resid < pti->pt_ioc.c_cc + 1) | |
302 | return (E2BIG); | |
303 | error = ureadc(TIOCPKT_TIOC, uio); | |
304 | while (error == 0 && pti->pt_ioc.c_cc > 0) { | |
305 | cc = q_to_b(&pti->pt_ioc, buf, | |
306 | MIN(pti->pt_ioc.c_cc, BUFSIZ)); | |
307 | if (cc <= 0) /* impossible? */ | |
308 | break; | |
309 | error = uiomove(buf, cc, UIO_READ, uio); | |
310 | } | |
311 | return (error); | |
312 | } | |
5bb90914 JB |
313 | if (tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) |
314 | break; | |
1a954a11 | 315 | } |
2bb0bef9 | 316 | if ((tp->t_state&TS_CARR_ON) == 0) |
e9fe78f8 | 317 | return (0); /* EOF */ |
c4ec2128 | 318 | if (flag & IO_NDELAY) |
840510a3 | 319 | return (EWOULDBLOCK); |
9a418eca MK |
320 | if (error = tsleep((caddr_t)&tp->t_outq.c_cf, TTIPRI | PCATCH, |
321 | ttyin, 0)) | |
322 | return (error); | |
8b8271ac | 323 | } |
6a5ca8a0 | 324 | if (pti->pt_flags & (PF_PKT|PF_UCNTL|PF_TIOC)) |
5bb90914 | 325 | error = ureadc(0, uio); |
2bb0bef9 SL |
326 | while (uio->uio_resid > 0 && error == 0) { |
327 | cc = q_to_b(&tp->t_outq, buf, MIN(uio->uio_resid, BUFSIZ)); | |
328 | if (cc <= 0) | |
ae9a0a69 | 329 | break; |
c4ec2128 | 330 | error = uiomove(buf, cc, uio); |
2bb0bef9 | 331 | } |
6a5ca8a0 KM |
332 | if (tp->t_outq.c_cc <= TTLOWAT(tp) && !(pti->pt_flags & PF_BLOCK)) |
333 | ptswake(tp); | |
840510a3 | 334 | return (error); |
45372428 MT |
335 | } |
336 | ||
6a5ca8a0 KM |
337 | ptswake(tp) |
338 | register struct tty *tp; | |
339 | { | |
340 | if (tp->t_state&TS_ASLEEP) { | |
341 | tp->t_state &= ~TS_ASLEEP; | |
342 | wakeup((caddr_t)&tp->t_outq); | |
343 | } | |
344 | if (tp->t_wsel) { | |
345 | selwakeup(tp->t_wsel, tp->t_state & TS_WCOLL); | |
346 | tp->t_wsel = 0; | |
347 | tp->t_state &= ~TS_WCOLL; | |
348 | } | |
349 | } | |
350 | ||
1a954a11 BJ |
351 | ptsstop(tp, flush) |
352 | register struct tty *tp; | |
353 | int flush; | |
354 | { | |
355 | struct pt_ioctl *pti = &pt_ioctl[minor(tp->t_dev)]; | |
5bb90914 | 356 | int flag; |
1a954a11 | 357 | |
1e6d24b1 BJ |
358 | /* note: FLUSHREAD and FLUSHWRITE already ok */ |
359 | if (flush == 0) { | |
360 | flush = TIOCPKT_STOP; | |
361 | pti->pt_flags |= PF_STOPPED; | |
5bb90914 | 362 | } else |
1e6d24b1 | 363 | pti->pt_flags &= ~PF_STOPPED; |
0a2bd708 | 364 | pti->pt_send |= flush; |
5bb90914 JB |
365 | /* change of perspective */ |
366 | flag = 0; | |
367 | if (flush & FREAD) | |
368 | flag |= FWRITE; | |
369 | if (flush & FWRITE) | |
370 | flag |= FREAD; | |
9d2a90b1 | 371 | ptcwakeup(tp, flag); |
1a954a11 BJ |
372 | } |
373 | ||
941944c9 | 374 | ptcselect(dev, rw) |
e1d74936 | 375 | dev_t dev; |
941944c9 | 376 | int rw; |
e1d74936 BJ |
377 | { |
378 | register struct tty *tp = &pt_tty[minor(dev)]; | |
defdbcd1 | 379 | struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; |
e1d74936 | 380 | struct proc *p; |
d427b3b2 | 381 | int s; |
e1d74936 | 382 | |
5bb90914 | 383 | if ((tp->t_state&TS_CARR_ON) == 0) |
e1d74936 | 384 | return (1); |
941944c9 BJ |
385 | switch (rw) { |
386 | ||
387 | case FREAD: | |
892f2f35 MK |
388 | /* |
389 | * Need to block timeouts (ttrstart). | |
390 | */ | |
391 | s = spltty(); | |
7cbd29e4 MK |
392 | if ((tp->t_state&TS_ISOPEN) && |
393 | tp->t_outq.c_cc && (tp->t_state&TS_TTSTOP) == 0) { | |
394 | splx(s); | |
395 | return (1); | |
396 | } | |
892f2f35 | 397 | splx(s); |
7cbd29e4 MK |
398 | /* FALLTHROUGH */ |
399 | ||
400 | case 0: /* exceptional */ | |
5bb90914 JB |
401 | if ((tp->t_state&TS_ISOPEN) && |
402 | (pti->pt_flags&PF_PKT && pti->pt_send || | |
6a5ca8a0 | 403 | pti->pt_flags&PF_TIOC && pti->pt_ioc.c_cc || |
892f2f35 | 404 | pti->pt_flags&PF_UCNTL && pti->pt_ucntl)) |
941944c9 | 405 | return (1); |
1a954a11 BJ |
406 | if ((p = pti->pt_selr) && p->p_wchan == (caddr_t)&selwait) |
407 | pti->pt_flags |= PF_RCOLL; | |
941944c9 | 408 | else |
1a954a11 | 409 | pti->pt_selr = u.u_procp; |
d427b3b2 | 410 | break; |
941944c9 | 411 | |
7cbd29e4 | 412 | |
941944c9 | 413 | case FWRITE: |
892f2f35 MK |
414 | if (tp->t_state&TS_ISOPEN) { |
415 | if (pti->pt_flags & PF_REMOTE) { | |
416 | if (tp->t_canq.c_cc == 0) | |
417 | return (1); | |
418 | } else { | |
419 | if (tp->t_rawq.c_cc + tp->t_canq.c_cc < TTYHOG-2) | |
420 | return (1); | |
e39f9ea6 | 421 | if (tp->t_canq.c_cc == 0 && (tp->t_iflag&ICANON)) |
892f2f35 MK |
422 | return (1); |
423 | } | |
d427b3b2 | 424 | } |
1a954a11 BJ |
425 | if ((p = pti->pt_selw) && p->p_wchan == (caddr_t)&selwait) |
426 | pti->pt_flags |= PF_WCOLL; | |
941944c9 | 427 | else |
1a954a11 | 428 | pti->pt_selw = u.u_procp; |
d427b3b2 | 429 | break; |
7cbd29e4 | 430 | |
941944c9 | 431 | } |
d427b3b2 | 432 | return (0); |
e1d74936 BJ |
433 | } |
434 | ||
e9fe78f8 | 435 | ptcwrite(dev, uio, flag) |
941944c9 | 436 | dev_t dev; |
5bb90914 | 437 | register struct uio *uio; |
e1d74936 | 438 | { |
840510a3 | 439 | register struct tty *tp = &pt_tty[minor(dev)]; |
88b2ff48 | 440 | register u_char *cp; |
5bb90914 | 441 | register int cc = 0; |
88b2ff48 | 442 | u_char locbuf[BUFSIZ]; |
941944c9 | 443 | int cnt = 0; |
defdbcd1 | 444 | struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; |
840510a3 | 445 | int error = 0; |
45372428 | 446 | |
defdbcd1 | 447 | again: |
5bb90914 JB |
448 | if ((tp->t_state&TS_ISOPEN) == 0) |
449 | goto block; | |
9d2a90b1 | 450 | if (pti->pt_flags & PF_REMOTE) { |
5bb90914 JB |
451 | if (tp->t_canq.c_cc) |
452 | goto block; | |
88b2ff48 | 453 | while (uio->uio_resid > 0 && tp->t_canq.c_cc < TTYHOG - 1) { |
9d2a90b1 | 454 | if (cc == 0) { |
88b2ff48 MK |
455 | cc = min(uio->uio_resid, BUFSIZ); |
456 | cc = min(cc, TTYHOG - 1 - tp->t_canq.c_cc); | |
9d2a90b1 | 457 | cp = locbuf; |
88b2ff48 | 458 | error = uiomove((caddr_t)cp, cc, uio); |
9d2a90b1 JB |
459 | if (error) |
460 | return (error); | |
461 | /* check again for safety */ | |
462 | if ((tp->t_state&TS_ISOPEN) == 0) | |
463 | return (EIO); | |
464 | } | |
465 | if (cc) | |
88b2ff48 | 466 | (void) b_to_q((char *)cp, cc, &tp->t_canq); |
9d2a90b1 | 467 | cc = 0; |
defdbcd1 | 468 | } |
5bb90914 JB |
469 | (void) putc(0, &tp->t_canq); |
470 | ttwakeup(tp); | |
471 | wakeup((caddr_t)&tp->t_canq); | |
472 | return (0); | |
473 | } | |
88b2ff48 | 474 | while (uio->uio_resid > 0) { |
5bb90914 | 475 | if (cc == 0) { |
88b2ff48 | 476 | cc = min(uio->uio_resid, BUFSIZ); |
5bb90914 | 477 | cp = locbuf; |
88b2ff48 | 478 | error = uiomove((caddr_t)cp, cc, uio); |
5bb90914 JB |
479 | if (error) |
480 | return (error); | |
481 | /* check again for safety */ | |
482 | if ((tp->t_state&TS_ISOPEN) == 0) | |
483 | return (EIO); | |
484 | } | |
9d2a90b1 JB |
485 | while (cc > 0) { |
486 | if ((tp->t_rawq.c_cc + tp->t_canq.c_cc) >= TTYHOG - 2 && | |
e39f9ea6 | 487 | (tp->t_canq.c_cc > 0 || !(tp->t_iflag&ICANON))) { |
9d2a90b1 JB |
488 | wakeup((caddr_t)&tp->t_rawq); |
489 | goto block; | |
490 | } | |
88b2ff48 | 491 | (*linesw[tp->t_line].l_rint)(*cp++, tp); |
941944c9 | 492 | cnt++; |
9d2a90b1 | 493 | cc--; |
45372428 | 494 | } |
5bb90914 JB |
495 | cc = 0; |
496 | } | |
497 | return (0); | |
498 | block: | |
499 | /* | |
9d2a90b1 JB |
500 | * Come here to wait for slave to open, for space |
501 | * in outq, or space in rawq. | |
5bb90914 JB |
502 | */ |
503 | if ((tp->t_state&TS_CARR_ON) == 0) | |
504 | return (EIO); | |
88b2ff48 MK |
505 | if (flag & IO_NDELAY) { |
506 | /* adjust for data copied in but not written */ | |
5bb90914 | 507 | uio->uio_resid += cc; |
9d2a90b1 JB |
508 | if (cnt == 0) |
509 | return (EWOULDBLOCK); | |
5bb90914 JB |
510 | return (0); |
511 | } | |
9a418eca | 512 | if (error = tsleep((caddr_t)&tp->t_rawq.c_cf, TTOPRI | PCATCH, |
88b2ff48 MK |
513 | ttyout, 0)) { |
514 | /* adjust for data copied in but not written */ | |
515 | uio->uio_resid += cc; | |
9a418eca | 516 | return (error); |
88b2ff48 | 517 | } |
5bb90914 | 518 | goto again; |
45372428 MT |
519 | } |
520 | ||
45372428 | 521 | /*ARGSUSED*/ |
4b72e2f9 SL |
522 | ptyioctl(dev, cmd, data, flag) |
523 | caddr_t data; | |
e1d74936 BJ |
524 | dev_t dev; |
525 | { | |
0a2bd708 BJ |
526 | register struct tty *tp = &pt_tty[minor(dev)]; |
527 | register struct pt_ioctl *pti = &pt_ioctl[minor(dev)]; | |
e39f9ea6 | 528 | register u_char *cc = tp->t_cc; |
5bb90914 | 529 | int stop, error; |
f2f3b49b | 530 | extern ttyinput(); |
45372428 | 531 | |
f2f3b49b MK |
532 | /* |
533 | * IF CONTROLLER STTY THEN MUST FLUSH TO PREVENT A HANG. | |
534 | * ttywflush(tp) will hang if there are characters in the outq. | |
535 | */ | |
44ce8f01 MT |
536 | if (cmd == TIOCEXT) { |
537 | /* | |
538 | * When the EXTPROC bit is being toggled, we need | |
539 | * to send an TIOCPKT_IOCTL if the packet driver | |
540 | * is turned on. | |
541 | */ | |
542 | if (*(int *)data) { | |
543 | if (pti->pt_flags & PF_PKT) { | |
544 | pti->pt_send |= TIOCPKT_IOCTL; | |
545 | ptcwakeup(tp); | |
546 | } | |
547 | tp->t_lflag |= EXTPROC; | |
548 | } else { | |
549 | if ((tp->t_state & EXTPROC) && | |
550 | (pti->pt_flags & PF_PKT)) { | |
551 | pti->pt_send |= TIOCPKT_IOCTL; | |
552 | ptcwakeup(tp); | |
553 | } | |
554 | tp->t_lflag &= ~EXTPROC; | |
555 | } | |
556 | return(0); | |
557 | } else | |
6a5ca8a0 KM |
558 | if (cdevsw[major(dev)].d_open == ptcopen) { |
559 | if ((cmd & 0xffff) == (TIOCIOANS(0) & 0xffff)) { | |
560 | if (!(pti->pt_flags & PF_LIOC) || pti->pt_ioc.c_cc) | |
561 | return (EINVAL); | |
562 | (void) b_to_q(data, IOCPARM_LEN(cmd), &pti->pt_ioc); | |
563 | wakeup((caddr_t)&pti->pt_ioc); | |
564 | return (0); | |
565 | } | |
4b72e2f9 SL |
566 | switch (cmd) { |
567 | ||
1b2a00b5 MT |
568 | case TIOCGPGRP: |
569 | /* | |
570 | * We aviod calling ttioctl on the controller since, | |
571 | * in that case, tp must be the controlling terminal. | |
572 | */ | |
573 | *(int *)data = tp->t_pgrp ? tp->t_pgrp->pg_id : 0; | |
574 | return (0); | |
575 | ||
4b72e2f9 | 576 | case TIOCPKT: |
5bb90914 JB |
577 | if (*(int *)data) { |
578 | if (pti->pt_flags & PF_UCNTL) | |
579 | return (EINVAL); | |
1a954a11 | 580 | pti->pt_flags |= PF_PKT; |
5bb90914 | 581 | } else |
1a954a11 | 582 | pti->pt_flags &= ~PF_PKT; |
f21c8fb8 | 583 | return (0); |
4b72e2f9 | 584 | |
5bb90914 JB |
585 | case TIOCUCNTL: |
586 | if (*(int *)data) { | |
587 | if (pti->pt_flags & PF_PKT) | |
588 | return (EINVAL); | |
589 | pti->pt_flags |= PF_UCNTL; | |
590 | } else | |
591 | pti->pt_flags &= ~PF_UCNTL; | |
592 | return (0); | |
593 | ||
6a5ca8a0 KM |
594 | case TIOCTIOC: |
595 | if (*(int *)data) { | |
596 | if (pti->pt_flags & PF_UCNTL) | |
597 | return (EINVAL); | |
598 | pti->pt_flags |= PF_TIOC; | |
599 | } else { | |
600 | pti->pt_flags &= ~(PF_TIOC|PF_LIOC|PF_WIOC); | |
601 | while (pti->pt_ioc.c_cc) | |
602 | (void) getc(&pti->pt_ioc); | |
603 | wakeup((caddr_t)&pti->pt_ioc); | |
604 | } | |
605 | return (0); | |
606 | ||
607 | case TIOCBLK: | |
608 | if (*(int *)data) | |
609 | pti->pt_flags |= PF_BLOCK; | |
610 | else { | |
611 | if (pti->pt_flags & PF_OWAIT) | |
612 | wakeup((caddr_t)pti + 1); | |
613 | pti->pt_flags &= ~(PF_BLOCK|PF_OWAIT); | |
614 | ptswake(tp); | |
615 | } | |
616 | return (0); | |
617 | ||
4b72e2f9 SL |
618 | case TIOCREMOTE: |
619 | if (*(int *)data) | |
defdbcd1 BJ |
620 | pti->pt_flags |= PF_REMOTE; |
621 | else | |
622 | pti->pt_flags &= ~PF_REMOTE; | |
88a7a62a | 623 | ttyflush(tp, FREAD|FWRITE); |
f21c8fb8 | 624 | return (0); |
4b72e2f9 | 625 | |
6a5ca8a0 KM |
626 | case FIONREAD: |
627 | *(int *)data = tp->t_outq.c_cc; | |
628 | return (0); | |
629 | ||
e39f9ea6 | 630 | case TIOCSETP: |
f2f3b49b MK |
631 | case TIOCSETN: |
632 | case TIOCSETD: | |
e39f9ea6 MT |
633 | case TIOCSETA: |
634 | case TIOCSETAW: | |
635 | case TIOCSETAF: | |
88b2ff48 MK |
636 | case JUNK_TIOCSETAS: /* XXX */ |
637 | case JUNK_TIOCSETAWS: /* XXX */ | |
638 | case JUNK_TIOCSETAFS: /* XXX */ | |
4b72e2f9 SL |
639 | while (getc(&tp->t_outq) >= 0) |
640 | ; | |
641 | break; | |
44ce8f01 MT |
642 | |
643 | case TIOCSIG: | |
644 | if (*(unsigned int *)data >= NSIG) | |
645 | return(EINVAL); | |
646 | if ((tp->t_lflag&NOFLSH) == 0) | |
647 | ttyflush(tp, FREAD|FWRITE); | |
3ae82c34 PB |
648 | pgsignal(tp->t_pgrp, *(unsigned int *)data, 1); |
649 | if ((*(unsigned int *)data == SIGINFO) && | |
650 | ((tp->t_lflag&NOKERNINFO) == 0)) | |
651 | ttyinfo(tp); | |
44ce8f01 | 652 | return(0); |
8b8271ac | 653 | } |
6a5ca8a0 KM |
654 | } else if (pti->pt_flags & PF_TIOC) { |
655 | while (pti->pt_flags & PF_LIOC) { | |
656 | pti->pt_flags |= PF_WIOC; | |
657 | switch (tsleep((caddr_t)&pti->pt_flags,TTIPRI-1,5*hz)) { | |
658 | case TS_OK: | |
659 | continue; | |
660 | case TS_SIG: | |
661 | case TS_TIME: | |
662 | return (EBUSY); | |
663 | } | |
664 | } | |
665 | pti->pt_flags |= PF_LIOC | PF_BLOCK; | |
666 | while (pti->pt_ioc.c_cc) | |
667 | (void) getc(&pti->pt_ioc); | |
668 | (void) b_to_q(&cmd, sizeof cmd, &pti->pt_ioc); | |
669 | if (cmd & IOC_IN) | |
670 | (void) b_to_q(data, IOCPARM_LEN(cmd), &pti->pt_ioc); | |
671 | ptcwakeup(tp, FREAD); | |
672 | switch (tsleep((caddr_t)&pti->pt_ioc, TTIPRI-1, 5*hz)) { | |
673 | case TS_SIG: | |
674 | case TS_TIME: | |
675 | while (pti->pt_ioc.c_cc) | |
676 | (void) getc(&pti->pt_ioc); | |
677 | if (pti->pt_flags & PF_WIOC) | |
678 | wakeup((caddr_t)&pti->pt_flags); | |
679 | if (pti->pt_flags & PF_OWAIT) | |
680 | wakeup((caddr_t)pti + 1); | |
681 | pti->pt_flags &= ~(PF_LIOC|PF_WIOC|PF_BLOCK|PF_OWAIT); | |
682 | ptswake(tp); | |
683 | return (EBUSY); | |
684 | case TS_OK: | |
685 | break; | |
686 | } | |
687 | if (pti->pt_ioc.c_cc == 0) { | |
688 | if (pti->pt_flags & PF_WIOC) | |
689 | wakeup((caddr_t)&pti->pt_flags); | |
690 | if (pti->pt_flags & PF_OWAIT) | |
691 | wakeup((caddr_t)pti + 1); | |
692 | pti->pt_flags &= ~(PF_LIOC|PF_WIOC|PF_BLOCK|PF_OWAIT); | |
693 | ptswake(tp); | |
694 | goto doioctl; | |
695 | } | |
696 | if (q_to_b(&pti->pt_ioc, &error, sizeof error) != sizeof error) | |
697 | error = EINVAL; | |
698 | if (error == 0 && cmd & IOC_OUT) { | |
699 | if (IOCPARM_LEN(cmd) != pti->pt_ioc.c_cc) | |
700 | error = EINVAL; | |
701 | else | |
702 | (void) q_to_b(&pti->pt_ioc, data, | |
703 | pti->pt_ioc.c_cc); | |
704 | } | |
705 | while (pti->pt_ioc.c_cc) | |
706 | (void) getc(&pti->pt_ioc); | |
707 | if (pti->pt_flags & PF_WIOC) | |
708 | wakeup((caddr_t)&pti->pt_flags); | |
709 | if (pti->pt_flags & PF_OWAIT) | |
710 | wakeup((caddr_t)pti + 1); | |
711 | pti->pt_flags &= ~(PF_LIOC|PF_WIOC|PF_BLOCK|PF_OWAIT); | |
712 | ptswake(tp); | |
713 | return (error); | |
714 | } | |
715 | ||
716 | doioctl: | |
e39f9ea6 MT |
717 | error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag); |
718 | if (error < 0) | |
719 | error = ttioctl(tp, cmd, data, flag); | |
f2f3b49b MK |
720 | /* |
721 | * Since we use the tty queues internally, | |
722 | * pty's can't be switched to disciplines which overwrite | |
723 | * the queues. We can't tell anything about the discipline | |
724 | * from here... | |
6a5ca8a0 KM |
725 | * |
726 | * Nb: this is not really good enough, the line disc open routine | |
727 | * may have done anything at all, no guarantees that close | |
728 | * will fix it. This also has the effect of losing the | |
729 | * previous discipline, which an error on a TIOCSETD shouldn't | |
730 | * do... Sometime it should be done via an explicit check | |
731 | * for TIOCSETD, then check to see what linesw[new_number].l_rint | |
732 | * really is. | |
f2f3b49b MK |
733 | */ |
734 | if (linesw[tp->t_line].l_rint != ttyinput) { | |
735 | (*linesw[tp->t_line].l_close)(tp); | |
88b2ff48 | 736 | tp->t_line = TTYDISC; |
e9fe78f8 | 737 | (void)(*linesw[tp->t_line].l_open)(dev, tp, flag); |
f2f3b49b MK |
738 | error = ENOTTY; |
739 | } | |
6a5ca8a0 | 740 | |
5bb90914 JB |
741 | if (error < 0) { |
742 | if (pti->pt_flags & PF_UCNTL && | |
97d7430f | 743 | (cmd & ~0xff) == UIOCCMD(0)) { |
5bb90914 JB |
744 | if (cmd & 0xff) { |
745 | pti->pt_ucntl = (u_char)cmd; | |
746 | ptcwakeup(tp, FREAD); | |
747 | } | |
748 | return (0); | |
749 | } | |
f21c8fb8 | 750 | error = ENOTTY; |
5bb90914 | 751 | } |
44ce8f01 MT |
752 | /* |
753 | * If external processing and packet mode send ioctl packet. | |
754 | */ | |
755 | if ((tp->t_lflag&EXTPROC) && (pti->pt_flags & PF_PKT)) { | |
756 | switch(cmd) { | |
757 | case TIOCSETA: | |
758 | case TIOCSETAW: | |
759 | case TIOCSETAF: | |
88b2ff48 MK |
760 | case JUNK_TIOCSETAS: /* XXX */ |
761 | case JUNK_TIOCSETAWS: /* XXX */ | |
762 | case JUNK_TIOCSETAFS: /* XXX */ | |
44ce8f01 MT |
763 | case TIOCSETP: |
764 | case TIOCSETN: | |
765 | #ifdef COMPAT_43 | |
766 | case TIOCSETC: | |
767 | case TIOCSLTC: | |
768 | case TIOCLBIS: | |
769 | case TIOCLBIC: | |
770 | case TIOCLSET: | |
771 | #endif | |
772 | pti->pt_send |= TIOCPKT_IOCTL; | |
773 | default: | |
774 | break; | |
775 | } | |
776 | } | |
e39f9ea6 MT |
777 | stop = (tp->t_iflag & IXON) && CCEQ(cc[VSTOP], CTRL('s')) |
778 | && CCEQ(cc[VSTART], CTRL('q')); | |
0a2bd708 BJ |
779 | if (pti->pt_flags & PF_NOSTOP) { |
780 | if (stop) { | |
b31eb1ff | 781 | pti->pt_send &= ~TIOCPKT_NOSTOP; |
0a2bd708 BJ |
782 | pti->pt_send |= TIOCPKT_DOSTOP; |
783 | pti->pt_flags &= ~PF_NOSTOP; | |
5bb90914 | 784 | ptcwakeup(tp, FREAD); |
0a2bd708 BJ |
785 | } |
786 | } else { | |
5bb90914 | 787 | if (!stop) { |
0a2bd708 BJ |
788 | pti->pt_send &= ~TIOCPKT_DOSTOP; |
789 | pti->pt_send |= TIOCPKT_NOSTOP; | |
790 | pti->pt_flags |= PF_NOSTOP; | |
5bb90914 | 791 | ptcwakeup(tp, FREAD); |
0a2bd708 BJ |
792 | } |
793 | } | |
f21c8fb8 | 794 | return (error); |
45372428 | 795 | } |
4f07e6e5 | 796 | #endif |