Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Serial interface for local (hardwired) serial ports on Un*x like systems |
9846de1b | 2 | Copyright 1992, 1993, 1994, 1998 Free Software Foundation, Inc. |
c906108c | 3 | |
c5aa993b | 4 | This file is part of GDB. |
c906108c | 5 | |
c5aa993b JM |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
c906108c | 10 | |
c5aa993b JM |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
c906108c | 15 | |
c5aa993b JM |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
20 | |
21 | #include "defs.h" | |
22 | #include "serial.h" | |
23 | #include <fcntl.h> | |
24 | #include <sys/types.h> | |
25 | #include "terminal.h" | |
26 | #ifdef HAVE_UNISTD_H | |
27 | #include <unistd.h> | |
28 | #endif | |
29 | ||
30 | #ifdef HAVE_TERMIOS | |
31 | ||
32 | struct hardwire_ttystate | |
c5aa993b JM |
33 | { |
34 | struct termios termios; | |
35 | }; | |
c906108c SS |
36 | #endif /* termios */ |
37 | ||
38 | #ifdef HAVE_TERMIO | |
39 | ||
40 | /* It is believed that all systems which have added job control to SVR3 | |
41 | (e.g. sco) have also added termios. Even if not, trying to figure out | |
42 | all the variations (TIOCGPGRP vs. TCGETPGRP, etc.) would be pretty | |
43 | bewildering. So we don't attempt it. */ | |
44 | ||
45 | struct hardwire_ttystate | |
c5aa993b JM |
46 | { |
47 | struct termio termio; | |
48 | }; | |
c906108c SS |
49 | #endif /* termio */ |
50 | ||
51 | #ifdef HAVE_SGTTY | |
52 | /* Needed for the code which uses select(). We would include <sys/select.h> | |
53 | too if it existed on all systems. */ | |
54 | #include <sys/time.h> | |
55 | ||
56 | struct hardwire_ttystate | |
c5aa993b JM |
57 | { |
58 | struct sgttyb sgttyb; | |
59 | struct tchars tc; | |
60 | struct ltchars ltc; | |
61 | /* Line discipline flags. */ | |
62 | int lmode; | |
63 | }; | |
c906108c SS |
64 | #endif /* sgtty */ |
65 | ||
66 | static int hardwire_open PARAMS ((serial_t scb, const char *name)); | |
67 | static void hardwire_raw PARAMS ((serial_t scb)); | |
68 | static int wait_for PARAMS ((serial_t scb, int timeout)); | |
69 | static int hardwire_readchar PARAMS ((serial_t scb, int timeout)); | |
70 | static int rate_to_code PARAMS ((int rate)); | |
71 | static int hardwire_setbaudrate PARAMS ((serial_t scb, int rate)); | |
72 | static int hardwire_write PARAMS ((serial_t scb, const char *str, int len)); | |
73 | static void hardwire_close PARAMS ((serial_t scb)); | |
c5aa993b JM |
74 | static int get_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate * state)); |
75 | static int set_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate * state)); | |
c906108c SS |
76 | static serial_ttystate hardwire_get_tty_state PARAMS ((serial_t scb)); |
77 | static int hardwire_set_tty_state PARAMS ((serial_t scb, serial_ttystate state)); | |
78 | static int hardwire_noflush_set_tty_state PARAMS ((serial_t, serial_ttystate, | |
79 | serial_ttystate)); | |
80 | static void hardwire_print_tty_state PARAMS ((serial_t, serial_ttystate)); | |
81 | static int hardwire_drain_output PARAMS ((serial_t)); | |
82 | static int hardwire_flush_output PARAMS ((serial_t)); | |
83 | static int hardwire_flush_input PARAMS ((serial_t)); | |
84 | static int hardwire_send_break PARAMS ((serial_t)); | |
85 | static int hardwire_setstopbits PARAMS ((serial_t, int)); | |
86 | ||
87 | void _initialize_ser_hardwire PARAMS ((void)); | |
88 | ||
7a292a7a | 89 | extern int (*ui_loop_hook) PARAMS ((int)); |
c906108c SS |
90 | |
91 | /* Open up a real live device for serial I/O */ | |
92 | ||
93 | static int | |
c5aa993b | 94 | hardwire_open (scb, name) |
c906108c SS |
95 | serial_t scb; |
96 | const char *name; | |
97 | { | |
98 | scb->fd = open (name, O_RDWR); | |
99 | if (scb->fd < 0) | |
100 | return -1; | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | static int | |
106 | get_tty_state (scb, state) | |
107 | serial_t scb; | |
108 | struct hardwire_ttystate *state; | |
109 | { | |
110 | #ifdef HAVE_TERMIOS | |
c5aa993b | 111 | if (tcgetattr (scb->fd, &state->termios) < 0) |
c906108c SS |
112 | return -1; |
113 | ||
114 | return 0; | |
115 | #endif | |
116 | ||
117 | #ifdef HAVE_TERMIO | |
118 | if (ioctl (scb->fd, TCGETA, &state->termio) < 0) | |
119 | return -1; | |
120 | return 0; | |
121 | #endif | |
122 | ||
123 | #ifdef HAVE_SGTTY | |
124 | if (ioctl (scb->fd, TIOCGETP, &state->sgttyb) < 0) | |
125 | return -1; | |
126 | if (ioctl (scb->fd, TIOCGETC, &state->tc) < 0) | |
127 | return -1; | |
128 | if (ioctl (scb->fd, TIOCGLTC, &state->ltc) < 0) | |
129 | return -1; | |
130 | if (ioctl (scb->fd, TIOCLGET, &state->lmode) < 0) | |
131 | return -1; | |
132 | ||
133 | return 0; | |
134 | #endif | |
135 | } | |
136 | ||
137 | static int | |
c5aa993b | 138 | set_tty_state (scb, state) |
c906108c SS |
139 | serial_t scb; |
140 | struct hardwire_ttystate *state; | |
141 | { | |
142 | #ifdef HAVE_TERMIOS | |
c5aa993b | 143 | if (tcsetattr (scb->fd, TCSANOW, &state->termios) < 0) |
c906108c SS |
144 | return -1; |
145 | ||
146 | return 0; | |
147 | #endif | |
148 | ||
149 | #ifdef HAVE_TERMIO | |
150 | if (ioctl (scb->fd, TCSETA, &state->termio) < 0) | |
151 | return -1; | |
152 | return 0; | |
153 | #endif | |
154 | ||
155 | #ifdef HAVE_SGTTY | |
156 | if (ioctl (scb->fd, TIOCSETN, &state->sgttyb) < 0) | |
157 | return -1; | |
158 | if (ioctl (scb->fd, TIOCSETC, &state->tc) < 0) | |
159 | return -1; | |
160 | if (ioctl (scb->fd, TIOCSLTC, &state->ltc) < 0) | |
161 | return -1; | |
162 | if (ioctl (scb->fd, TIOCLSET, &state->lmode) < 0) | |
163 | return -1; | |
164 | ||
165 | return 0; | |
166 | #endif | |
167 | } | |
168 | ||
169 | static serial_ttystate | |
c5aa993b | 170 | hardwire_get_tty_state (scb) |
c906108c SS |
171 | serial_t scb; |
172 | { | |
173 | struct hardwire_ttystate *state; | |
174 | ||
c5aa993b | 175 | state = (struct hardwire_ttystate *) xmalloc (sizeof *state); |
c906108c | 176 | |
c5aa993b | 177 | if (get_tty_state (scb, state)) |
c906108c SS |
178 | return NULL; |
179 | ||
c5aa993b | 180 | return (serial_ttystate) state; |
c906108c SS |
181 | } |
182 | ||
183 | static int | |
c5aa993b | 184 | hardwire_set_tty_state (scb, ttystate) |
c906108c SS |
185 | serial_t scb; |
186 | serial_ttystate ttystate; | |
187 | { | |
188 | struct hardwire_ttystate *state; | |
189 | ||
c5aa993b | 190 | state = (struct hardwire_ttystate *) ttystate; |
c906108c | 191 | |
c5aa993b | 192 | return set_tty_state (scb, state); |
c906108c SS |
193 | } |
194 | ||
195 | static int | |
196 | hardwire_noflush_set_tty_state (scb, new_ttystate, old_ttystate) | |
197 | serial_t scb; | |
198 | serial_ttystate new_ttystate; | |
199 | serial_ttystate old_ttystate; | |
200 | { | |
201 | struct hardwire_ttystate new_state; | |
202 | #ifdef HAVE_SGTTY | |
203 | struct hardwire_ttystate *state = (struct hardwire_ttystate *) old_ttystate; | |
204 | #endif | |
205 | ||
c5aa993b | 206 | new_state = *(struct hardwire_ttystate *) new_ttystate; |
c906108c SS |
207 | |
208 | /* Don't change in or out of raw mode; we don't want to flush input. | |
209 | termio and termios have no such restriction; for them flushing input | |
210 | is separate from setting the attributes. */ | |
211 | ||
212 | #ifdef HAVE_SGTTY | |
213 | if (state->sgttyb.sg_flags & RAW) | |
214 | new_state.sgttyb.sg_flags |= RAW; | |
215 | else | |
216 | new_state.sgttyb.sg_flags &= ~RAW; | |
217 | ||
218 | /* I'm not sure whether this is necessary; the manpage just mentions | |
219 | RAW not CBREAK. */ | |
220 | if (state->sgttyb.sg_flags & CBREAK) | |
221 | new_state.sgttyb.sg_flags |= CBREAK; | |
222 | else | |
223 | new_state.sgttyb.sg_flags &= ~CBREAK; | |
224 | #endif | |
225 | ||
226 | return set_tty_state (scb, &new_state); | |
227 | } | |
228 | ||
229 | static void | |
230 | hardwire_print_tty_state (scb, ttystate) | |
231 | serial_t scb; | |
232 | serial_ttystate ttystate; | |
233 | { | |
234 | struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate; | |
235 | int i; | |
236 | ||
237 | #ifdef HAVE_TERMIOS | |
238 | printf_filtered ("c_iflag = 0x%x, c_oflag = 0x%x,\n", | |
239 | state->termios.c_iflag, state->termios.c_oflag); | |
240 | printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x\n", | |
241 | state->termios.c_cflag, state->termios.c_lflag); | |
242 | #if 0 | |
243 | /* This not in POSIX, and is not really documented by those systems | |
244 | which have it (at least not Sun). */ | |
245 | printf_filtered ("c_line = 0x%x.\n", state->termios.c_line); | |
246 | #endif | |
247 | printf_filtered ("c_cc: "); | |
248 | for (i = 0; i < NCCS; i += 1) | |
249 | printf_filtered ("0x%x ", state->termios.c_cc[i]); | |
250 | printf_filtered ("\n"); | |
251 | #endif | |
252 | ||
253 | #ifdef HAVE_TERMIO | |
254 | printf_filtered ("c_iflag = 0x%x, c_oflag = 0x%x,\n", | |
255 | state->termio.c_iflag, state->termio.c_oflag); | |
256 | printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n", | |
257 | state->termio.c_cflag, state->termio.c_lflag, | |
258 | state->termio.c_line); | |
259 | printf_filtered ("c_cc: "); | |
260 | for (i = 0; i < NCC; i += 1) | |
261 | printf_filtered ("0x%x ", state->termio.c_cc[i]); | |
262 | printf_filtered ("\n"); | |
263 | #endif | |
264 | ||
265 | #ifdef HAVE_SGTTY | |
266 | printf_filtered ("sgttyb.sg_flags = 0x%x.\n", state->sgttyb.sg_flags); | |
267 | ||
268 | printf_filtered ("tchars: "); | |
c5aa993b JM |
269 | for (i = 0; i < (int) sizeof (struct tchars); i++) |
270 | printf_filtered ("0x%x ", ((unsigned char *) &state->tc)[i]); | |
c906108c SS |
271 | printf_filtered ("\n"); |
272 | ||
273 | printf_filtered ("ltchars: "); | |
c5aa993b JM |
274 | for (i = 0; i < (int) sizeof (struct ltchars); i++) |
275 | printf_filtered ("0x%x ", ((unsigned char *) &state->ltc)[i]); | |
c906108c SS |
276 | printf_filtered ("\n"); |
277 | ||
278 | printf_filtered ("lmode: 0x%x\n", state->lmode); | |
279 | #endif | |
280 | } | |
281 | ||
282 | /* Wait for the output to drain away, as opposed to flushing (discarding) it */ | |
283 | ||
284 | static int | |
285 | hardwire_drain_output (scb) | |
286 | serial_t scb; | |
287 | { | |
288 | #ifdef HAVE_TERMIOS | |
289 | return tcdrain (scb->fd); | |
290 | #endif | |
291 | ||
292 | #ifdef HAVE_TERMIO | |
293 | return ioctl (scb->fd, TCSBRK, 1); | |
294 | #endif | |
295 | ||
296 | #ifdef HAVE_SGTTY | |
297 | /* Get the current state and then restore it using TIOCSETP, | |
298 | which should cause the output to drain and pending input | |
299 | to be discarded. */ | |
300 | { | |
301 | struct hardwire_ttystate state; | |
302 | if (get_tty_state (scb, &state)) | |
303 | { | |
304 | return (-1); | |
305 | } | |
306 | else | |
307 | { | |
308 | return (ioctl (scb->fd, TIOCSETP, &state.sgttyb)); | |
309 | } | |
310 | } | |
c5aa993b | 311 | #endif |
c906108c SS |
312 | } |
313 | ||
314 | static int | |
315 | hardwire_flush_output (scb) | |
316 | serial_t scb; | |
317 | { | |
318 | #ifdef HAVE_TERMIOS | |
319 | return tcflush (scb->fd, TCOFLUSH); | |
320 | #endif | |
321 | ||
322 | #ifdef HAVE_TERMIO | |
323 | return ioctl (scb->fd, TCFLSH, 1); | |
324 | #endif | |
325 | ||
326 | #ifdef HAVE_SGTTY | |
327 | /* This flushes both input and output, but we can't do better. */ | |
328 | return ioctl (scb->fd, TIOCFLUSH, 0); | |
c5aa993b | 329 | #endif |
c906108c SS |
330 | } |
331 | ||
332 | static int | |
333 | hardwire_flush_input (scb) | |
334 | serial_t scb; | |
335 | { | |
336 | scb->bufcnt = 0; | |
337 | scb->bufp = scb->buf; | |
338 | ||
339 | #ifdef HAVE_TERMIOS | |
340 | return tcflush (scb->fd, TCIFLUSH); | |
341 | #endif | |
342 | ||
343 | #ifdef HAVE_TERMIO | |
344 | return ioctl (scb->fd, TCFLSH, 0); | |
345 | #endif | |
346 | ||
347 | #ifdef HAVE_SGTTY | |
348 | /* This flushes both input and output, but we can't do better. */ | |
349 | return ioctl (scb->fd, TIOCFLUSH, 0); | |
c5aa993b | 350 | #endif |
c906108c SS |
351 | } |
352 | ||
353 | static int | |
354 | hardwire_send_break (scb) | |
355 | serial_t scb; | |
356 | { | |
357 | #ifdef HAVE_TERMIOS | |
358 | return tcsendbreak (scb->fd, 0); | |
359 | #endif | |
360 | ||
361 | #ifdef HAVE_TERMIO | |
362 | return ioctl (scb->fd, TCSBRK, 0); | |
363 | #endif | |
364 | ||
365 | #ifdef HAVE_SGTTY | |
366 | { | |
367 | int status; | |
368 | struct timeval timeout; | |
369 | ||
370 | status = ioctl (scb->fd, TIOCSBRK, 0); | |
371 | ||
372 | /* Can't use usleep; it doesn't exist in BSD 4.2. */ | |
373 | /* Note that if this select() is interrupted by a signal it will not wait | |
374 | the full length of time. I think that is OK. */ | |
375 | timeout.tv_sec = 0; | |
376 | timeout.tv_usec = 250000; | |
377 | select (0, 0, 0, 0, &timeout); | |
378 | status = ioctl (scb->fd, TIOCCBRK, 0); | |
379 | return status; | |
380 | } | |
c5aa993b | 381 | #endif |
c906108c SS |
382 | } |
383 | ||
384 | static void | |
c5aa993b | 385 | hardwire_raw (scb) |
c906108c SS |
386 | serial_t scb; |
387 | { | |
388 | struct hardwire_ttystate state; | |
389 | ||
c5aa993b JM |
390 | if (get_tty_state (scb, &state)) |
391 | fprintf_unfiltered (gdb_stderr, "get_tty_state failed: %s\n", safe_strerror (errno)); | |
c906108c SS |
392 | |
393 | #ifdef HAVE_TERMIOS | |
394 | state.termios.c_iflag = 0; | |
395 | state.termios.c_oflag = 0; | |
396 | state.termios.c_lflag = 0; | |
c5aa993b | 397 | state.termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c SS |
398 | state.termios.c_cflag |= CLOCAL | CS8; |
399 | state.termios.c_cc[VMIN] = 0; | |
400 | state.termios.c_cc[VTIME] = 0; | |
401 | #endif | |
402 | ||
403 | #ifdef HAVE_TERMIO | |
404 | state.termio.c_iflag = 0; | |
405 | state.termio.c_oflag = 0; | |
406 | state.termio.c_lflag = 0; | |
c5aa993b | 407 | state.termio.c_cflag &= ~(CSIZE | PARENB); |
c906108c SS |
408 | state.termio.c_cflag |= CLOCAL | CS8; |
409 | state.termio.c_cc[VMIN] = 0; | |
410 | state.termio.c_cc[VTIME] = 0; | |
411 | #endif | |
412 | ||
413 | #ifdef HAVE_SGTTY | |
414 | state.sgttyb.sg_flags |= RAW | ANYP; | |
415 | state.sgttyb.sg_flags &= ~(CBREAK | ECHO); | |
416 | #endif | |
417 | ||
418 | scb->current_timeout = 0; | |
419 | ||
420 | if (set_tty_state (scb, &state)) | |
c5aa993b | 421 | fprintf_unfiltered (gdb_stderr, "set_tty_state failed: %s\n", safe_strerror (errno)); |
c906108c SS |
422 | } |
423 | ||
424 | /* Wait for input on scb, with timeout seconds. Returns 0 on success, | |
425 | otherwise SERIAL_TIMEOUT or SERIAL_ERROR. | |
426 | ||
427 | For termio{s}, we actually just setup VTIME if necessary, and let the | |
428 | timeout occur in the read() in hardwire_read(). | |
429 | */ | |
430 | ||
431 | static int | |
c5aa993b | 432 | wait_for (scb, timeout) |
c906108c SS |
433 | serial_t scb; |
434 | int timeout; | |
435 | { | |
c906108c SS |
436 | #ifdef HAVE_SGTTY |
437 | { | |
438 | struct timeval tv; | |
439 | fd_set readfds; | |
440 | ||
441 | FD_ZERO (&readfds); | |
442 | ||
443 | tv.tv_sec = timeout; | |
444 | tv.tv_usec = 0; | |
445 | ||
c5aa993b | 446 | FD_SET (scb->fd, &readfds); |
c906108c SS |
447 | |
448 | while (1) | |
449 | { | |
450 | int numfds; | |
451 | ||
452 | if (timeout >= 0) | |
c5aa993b | 453 | numfds = select (scb->fd + 1, &readfds, 0, 0, &tv); |
c906108c | 454 | else |
c5aa993b | 455 | numfds = select (scb->fd + 1, &readfds, 0, 0, 0); |
c906108c SS |
456 | |
457 | if (numfds <= 0) | |
458 | if (numfds == 0) | |
459 | return SERIAL_TIMEOUT; | |
460 | else if (errno == EINTR) | |
461 | continue; | |
462 | else | |
463 | return SERIAL_ERROR; /* Got an error from select or poll */ | |
464 | ||
465 | return 0; | |
466 | } | |
467 | } | |
c5aa993b | 468 | #endif /* HAVE_SGTTY */ |
c906108c SS |
469 | |
470 | #if defined HAVE_TERMIO || defined HAVE_TERMIOS | |
471 | if (timeout == scb->current_timeout) | |
472 | return 0; | |
473 | ||
474 | scb->current_timeout = timeout; | |
475 | ||
476 | { | |
477 | struct hardwire_ttystate state; | |
478 | ||
c5aa993b JM |
479 | if (get_tty_state (scb, &state)) |
480 | fprintf_unfiltered (gdb_stderr, "get_tty_state failed: %s\n", safe_strerror (errno)); | |
c906108c SS |
481 | |
482 | #ifdef HAVE_TERMIOS | |
483 | if (timeout < 0) | |
484 | { | |
485 | /* No timeout. */ | |
486 | state.termios.c_cc[VTIME] = 0; | |
487 | state.termios.c_cc[VMIN] = 1; | |
488 | } | |
489 | else | |
490 | { | |
491 | state.termios.c_cc[VMIN] = 0; | |
492 | state.termios.c_cc[VTIME] = timeout * 10; | |
493 | if (state.termios.c_cc[VTIME] != timeout * 10) | |
494 | { | |
495 | ||
496 | /* If c_cc is an 8-bit signed character, we can't go | |
497 | bigger than this. If it is always unsigned, we could use | |
498 | 25. */ | |
499 | ||
500 | scb->current_timeout = 12; | |
501 | state.termios.c_cc[VTIME] = scb->current_timeout * 10; | |
502 | scb->timeout_remaining = timeout - scb->current_timeout; | |
503 | } | |
504 | } | |
505 | #endif | |
506 | ||
507 | #ifdef HAVE_TERMIO | |
508 | if (timeout < 0) | |
509 | { | |
510 | /* No timeout. */ | |
511 | state.termio.c_cc[VTIME] = 0; | |
512 | state.termio.c_cc[VMIN] = 1; | |
513 | } | |
514 | else | |
515 | { | |
516 | state.termio.c_cc[VMIN] = 0; | |
517 | state.termio.c_cc[VTIME] = timeout * 10; | |
518 | if (state.termio.c_cc[VTIME] != timeout * 10) | |
519 | { | |
520 | /* If c_cc is an 8-bit signed character, we can't go | |
521 | bigger than this. If it is always unsigned, we could use | |
522 | 25. */ | |
523 | ||
524 | scb->current_timeout = 12; | |
525 | state.termio.c_cc[VTIME] = scb->current_timeout * 10; | |
526 | scb->timeout_remaining = timeout - scb->current_timeout; | |
527 | } | |
528 | } | |
529 | #endif | |
530 | ||
531 | if (set_tty_state (scb, &state)) | |
c5aa993b | 532 | fprintf_unfiltered (gdb_stderr, "set_tty_state failed: %s\n", safe_strerror (errno)); |
c906108c SS |
533 | |
534 | return 0; | |
535 | } | |
c5aa993b | 536 | #endif /* HAVE_TERMIO || HAVE_TERMIOS */ |
c906108c SS |
537 | } |
538 | ||
539 | /* Read a character with user-specified timeout. TIMEOUT is number of seconds | |
540 | to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns | |
541 | char if successful. Returns SERIAL_TIMEOUT if timeout expired, EOF if line | |
542 | dropped dead, or SERIAL_ERROR for any other error (see errno in that case). */ | |
543 | static int | |
544 | hardwire_readchar (scb, timeout) | |
545 | serial_t scb; | |
546 | int timeout; | |
547 | { | |
7a292a7a SS |
548 | int status, delta; |
549 | int detach = 0; | |
c906108c SS |
550 | |
551 | if (scb->bufcnt-- > 0) | |
552 | return *scb->bufp++; | |
553 | ||
c906108c SS |
554 | if (timeout > 0) |
555 | timeout++; | |
c906108c | 556 | |
7a292a7a SS |
557 | /* We have to be able to keep the GUI alive here, so we break the original |
558 | timeout into steps of 1 second, running the "keep the GUI alive" hook | |
559 | each time through the loop. | |
560 | Also, timeout = 0 means to poll, so we just set the delta to 0, so we | |
561 | will only go through the loop once. */ | |
c5aa993b | 562 | |
7a292a7a | 563 | delta = (timeout == 0 ? 0 : 1); |
c906108c SS |
564 | while (1) |
565 | { | |
c906108c | 566 | |
7a292a7a SS |
567 | /* N.B. The UI may destroy our world (for instance by calling |
568 | remote_stop,) in which case we want to get out of here as | |
569 | quickly as possible. It is not safe to touch scb, since | |
570 | someone else might have freed it. The ui_loop_hook signals that | |
571 | we should exit by returning 1. */ | |
572 | ||
c906108c | 573 | if (ui_loop_hook) |
c5aa993b | 574 | detach = ui_loop_hook (0); |
7a292a7a SS |
575 | |
576 | if (detach) | |
577 | return SERIAL_TIMEOUT; | |
578 | ||
579 | scb->timeout_remaining = (timeout < 0 ? timeout : timeout - delta); | |
580 | status = wait_for (scb, delta); | |
581 | ||
c906108c SS |
582 | if (status < 0) |
583 | return status; | |
584 | ||
585 | scb->bufcnt = read (scb->fd, scb->buf, BUFSIZ); | |
586 | ||
587 | if (scb->bufcnt <= 0) | |
588 | { | |
589 | if (scb->bufcnt == 0) | |
590 | { | |
591 | /* Zero characters means timeout (it could also be EOF, but | |
c5aa993b | 592 | we don't (yet at least) distinguish). */ |
c906108c SS |
593 | if (scb->timeout_remaining > 0) |
594 | { | |
595 | timeout = scb->timeout_remaining; | |
596 | continue; | |
597 | } | |
c5aa993b JM |
598 | else if (scb->timeout_remaining < 0) |
599 | continue; | |
c906108c SS |
600 | else |
601 | return SERIAL_TIMEOUT; | |
602 | } | |
603 | else if (errno == EINTR) | |
604 | continue; | |
605 | else | |
606 | return SERIAL_ERROR; /* Got an error from read */ | |
607 | } | |
608 | ||
609 | scb->bufcnt--; | |
610 | scb->bufp = scb->buf; | |
611 | return *scb->bufp++; | |
612 | } | |
613 | } | |
614 | ||
615 | #ifndef B19200 | |
616 | #define B19200 EXTA | |
617 | #endif | |
618 | ||
619 | #ifndef B38400 | |
620 | #define B38400 EXTB | |
621 | #endif | |
622 | ||
623 | /* Translate baud rates from integers to damn B_codes. Unix should | |
624 | have outgrown this crap years ago, but even POSIX wouldn't buck it. */ | |
625 | ||
626 | static struct | |
627 | { | |
628 | int rate; | |
629 | int code; | |
630 | } | |
631 | baudtab[] = | |
632 | { | |
c5aa993b JM |
633 | { |
634 | 50, B50 | |
635 | } | |
636 | , | |
637 | { | |
638 | 75, B75 | |
639 | } | |
640 | , | |
641 | { | |
642 | 110, B110 | |
643 | } | |
644 | , | |
645 | { | |
646 | 134, B134 | |
647 | } | |
648 | , | |
649 | { | |
650 | 150, B150 | |
651 | } | |
652 | , | |
653 | { | |
654 | 200, B200 | |
655 | } | |
656 | , | |
657 | { | |
658 | 300, B300 | |
659 | } | |
660 | , | |
661 | { | |
662 | 600, B600 | |
663 | } | |
664 | , | |
665 | { | |
666 | 1200, B1200 | |
667 | } | |
668 | , | |
669 | { | |
670 | 1800, B1800 | |
671 | } | |
672 | , | |
673 | { | |
674 | 2400, B2400 | |
675 | } | |
676 | , | |
677 | { | |
678 | 4800, B4800 | |
679 | } | |
680 | , | |
681 | { | |
682 | 9600, B9600 | |
683 | } | |
684 | , | |
685 | { | |
686 | 19200, B19200 | |
687 | } | |
688 | , | |
689 | { | |
690 | 38400, B38400 | |
691 | } | |
692 | , | |
c906108c | 693 | #ifdef B57600 |
c5aa993b JM |
694 | { |
695 | 57600, B57600 | |
696 | } | |
697 | , | |
c906108c SS |
698 | #endif |
699 | #ifdef B115200 | |
c5aa993b JM |
700 | { |
701 | 115200, B115200 | |
702 | } | |
703 | , | |
c906108c SS |
704 | #endif |
705 | #ifdef B230400 | |
c5aa993b JM |
706 | { |
707 | 230400, B230400 | |
708 | } | |
709 | , | |
c906108c SS |
710 | #endif |
711 | #ifdef B460800 | |
c5aa993b JM |
712 | { |
713 | 460800, B460800 | |
714 | } | |
715 | , | |
c906108c | 716 | #endif |
c5aa993b JM |
717 | { |
718 | -1, -1 | |
719 | } | |
720 | , | |
c906108c SS |
721 | }; |
722 | ||
c5aa993b JM |
723 | static int |
724 | rate_to_code (rate) | |
c906108c SS |
725 | int rate; |
726 | { | |
727 | int i; | |
728 | ||
729 | for (i = 0; baudtab[i].rate != -1; i++) | |
c5aa993b | 730 | if (rate == baudtab[i].rate) |
c906108c SS |
731 | return baudtab[i].code; |
732 | ||
733 | return -1; | |
734 | } | |
735 | ||
736 | static int | |
c5aa993b | 737 | hardwire_setbaudrate (scb, rate) |
c906108c SS |
738 | serial_t scb; |
739 | int rate; | |
740 | { | |
741 | struct hardwire_ttystate state; | |
742 | ||
c5aa993b | 743 | if (get_tty_state (scb, &state)) |
c906108c SS |
744 | return -1; |
745 | ||
746 | #ifdef HAVE_TERMIOS | |
747 | cfsetospeed (&state.termios, rate_to_code (rate)); | |
748 | cfsetispeed (&state.termios, rate_to_code (rate)); | |
749 | #endif | |
750 | ||
751 | #ifdef HAVE_TERMIO | |
752 | #ifndef CIBAUD | |
753 | #define CIBAUD CBAUD | |
754 | #endif | |
755 | ||
756 | state.termio.c_cflag &= ~(CBAUD | CIBAUD); | |
757 | state.termio.c_cflag |= rate_to_code (rate); | |
758 | #endif | |
759 | ||
760 | #ifdef HAVE_SGTTY | |
761 | state.sgttyb.sg_ispeed = rate_to_code (rate); | |
762 | state.sgttyb.sg_ospeed = rate_to_code (rate); | |
763 | #endif | |
764 | ||
765 | return set_tty_state (scb, &state); | |
766 | } | |
767 | ||
768 | static int | |
c5aa993b | 769 | hardwire_setstopbits (scb, num) |
c906108c SS |
770 | serial_t scb; |
771 | int num; | |
772 | { | |
773 | struct hardwire_ttystate state; | |
774 | int newbit; | |
775 | ||
c5aa993b | 776 | if (get_tty_state (scb, &state)) |
c906108c SS |
777 | return -1; |
778 | ||
779 | switch (num) | |
780 | { | |
781 | case SERIAL_1_STOPBITS: | |
782 | newbit = 0; | |
783 | break; | |
784 | case SERIAL_1_AND_A_HALF_STOPBITS: | |
785 | case SERIAL_2_STOPBITS: | |
786 | newbit = 1; | |
787 | break; | |
788 | default: | |
789 | return 1; | |
790 | } | |
791 | ||
792 | #ifdef HAVE_TERMIOS | |
793 | if (!newbit) | |
794 | state.termios.c_cflag &= ~CSTOPB; | |
795 | else | |
c5aa993b | 796 | state.termios.c_cflag |= CSTOPB; /* two bits */ |
c906108c SS |
797 | #endif |
798 | ||
799 | #ifdef HAVE_TERMIO | |
800 | if (!newbit) | |
801 | state.termio.c_cflag &= ~CSTOPB; | |
802 | else | |
c5aa993b | 803 | state.termio.c_cflag |= CSTOPB; /* two bits */ |
c906108c SS |
804 | #endif |
805 | ||
806 | #ifdef HAVE_SGTTY | |
807 | return 0; /* sgtty doesn't support this */ | |
808 | #endif | |
809 | ||
810 | return set_tty_state (scb, &state); | |
811 | } | |
812 | ||
813 | static int | |
c5aa993b | 814 | hardwire_write (scb, str, len) |
c906108c SS |
815 | serial_t scb; |
816 | const char *str; | |
817 | int len; | |
818 | { | |
819 | int cc; | |
820 | ||
821 | while (len > 0) | |
822 | { | |
c5aa993b | 823 | cc = write (scb->fd, str, len); |
c906108c SS |
824 | |
825 | if (cc < 0) | |
826 | return 1; | |
827 | len -= cc; | |
828 | str += cc; | |
829 | } | |
830 | return 0; | |
831 | } | |
832 | ||
833 | static void | |
c5aa993b | 834 | hardwire_close (scb) |
c906108c SS |
835 | serial_t scb; |
836 | { | |
837 | if (scb->fd < 0) | |
838 | return; | |
839 | ||
c5aa993b | 840 | close (scb->fd); |
c906108c SS |
841 | scb->fd = -1; |
842 | } | |
843 | ||
844 | static struct serial_ops hardwire_ops = | |
845 | { | |
846 | "hardwire", | |
847 | 0, | |
848 | hardwire_open, | |
849 | hardwire_close, | |
850 | hardwire_readchar, | |
851 | hardwire_write, | |
852 | hardwire_flush_output, | |
853 | hardwire_flush_input, | |
854 | hardwire_send_break, | |
855 | hardwire_raw, | |
856 | hardwire_get_tty_state, | |
857 | hardwire_set_tty_state, | |
858 | hardwire_print_tty_state, | |
859 | hardwire_noflush_set_tty_state, | |
860 | hardwire_setbaudrate, | |
861 | hardwire_setstopbits, | |
862 | hardwire_drain_output, /* wait for output to drain */ | |
863 | }; | |
864 | ||
865 | void | |
866 | _initialize_ser_hardwire () | |
867 | { | |
868 | serial_add_interface (&hardwire_ops); | |
869 | } |