Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Serial interface for local (hardwired) serial ports on Un*x like systems |
c2c6d25f | 2 | Copyright 1992, 1993, 1994, 1998-1999 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" | |
c2c6d25f JM |
23 | #include "ser-unix.h" |
24 | ||
c906108c SS |
25 | #include <fcntl.h> |
26 | #include <sys/types.h> | |
27 | #include "terminal.h" | |
c2c6d25f JM |
28 | #ifdef HAVE_SYS_WAIT_H |
29 | #include <sys/wait.h> | |
30 | #endif | |
31 | #include <sys/socket.h> | |
32 | #include <sys/time.h> | |
33 | ||
34 | #include "gdb_string.h" | |
35 | #include "event-loop.h" | |
36 | ||
c906108c SS |
37 | |
38 | #ifdef HAVE_TERMIOS | |
39 | ||
40 | struct hardwire_ttystate | |
c5aa993b JM |
41 | { |
42 | struct termios termios; | |
43 | }; | |
c906108c SS |
44 | #endif /* termios */ |
45 | ||
46 | #ifdef HAVE_TERMIO | |
47 | ||
48 | /* It is believed that all systems which have added job control to SVR3 | |
49 | (e.g. sco) have also added termios. Even if not, trying to figure out | |
50 | all the variations (TIOCGPGRP vs. TCGETPGRP, etc.) would be pretty | |
51 | bewildering. So we don't attempt it. */ | |
52 | ||
53 | struct hardwire_ttystate | |
c5aa993b JM |
54 | { |
55 | struct termio termio; | |
56 | }; | |
c906108c SS |
57 | #endif /* termio */ |
58 | ||
59 | #ifdef HAVE_SGTTY | |
c906108c | 60 | struct hardwire_ttystate |
c5aa993b JM |
61 | { |
62 | struct sgttyb sgttyb; | |
63 | struct tchars tc; | |
64 | struct ltchars ltc; | |
65 | /* Line discipline flags. */ | |
66 | int lmode; | |
67 | }; | |
c906108c SS |
68 | #endif /* sgtty */ |
69 | ||
c2c6d25f JM |
70 | static int hardwire_open (serial_t scb, const char *name); |
71 | static void hardwire_raw (serial_t scb); | |
72 | static int wait_for (serial_t scb, int timeout); | |
73 | static int hardwire_readchar (serial_t scb, int timeout); | |
74 | static int rate_to_code (int rate); | |
75 | static int hardwire_setbaudrate (serial_t scb, int rate); | |
76 | static int hardwire_write (serial_t scb, const char *str, int len); | |
77 | static void hardwire_close (serial_t scb); | |
78 | static int get_tty_state (serial_t scb, struct hardwire_ttystate * state); | |
79 | static int set_tty_state (serial_t scb, struct hardwire_ttystate * state); | |
80 | static serial_ttystate hardwire_get_tty_state (serial_t scb); | |
81 | static int hardwire_set_tty_state (serial_t scb, serial_ttystate state); | |
82 | static int hardwire_noflush_set_tty_state (serial_t, serial_ttystate, | |
83 | serial_ttystate); | |
84 | static void hardwire_print_tty_state (serial_t, serial_ttystate, struct gdb_file *); | |
85 | static int hardwire_drain_output (serial_t); | |
86 | static int hardwire_flush_output (serial_t); | |
87 | static int hardwire_flush_input (serial_t); | |
88 | static int hardwire_send_break (serial_t); | |
89 | static int hardwire_setstopbits (serial_t, int); | |
90 | ||
91 | void _initialize_ser_hardwire (void); | |
92 | ||
93 | extern int (*ui_loop_hook) (int); | |
c906108c SS |
94 | |
95 | /* Open up a real live device for serial I/O */ | |
96 | ||
97 | static int | |
c2c6d25f | 98 | hardwire_open (serial_t scb, const char *name) |
c906108c SS |
99 | { |
100 | scb->fd = open (name, O_RDWR); | |
101 | if (scb->fd < 0) | |
102 | return -1; | |
103 | ||
104 | return 0; | |
105 | } | |
106 | ||
107 | static int | |
c2c6d25f | 108 | get_tty_state (serial_t scb, struct hardwire_ttystate *state) |
c906108c SS |
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 | |
c2c6d25f | 138 | set_tty_state (serial_t scb, struct hardwire_ttystate *state) |
c906108c SS |
139 | { |
140 | #ifdef HAVE_TERMIOS | |
c5aa993b | 141 | if (tcsetattr (scb->fd, TCSANOW, &state->termios) < 0) |
c906108c SS |
142 | return -1; |
143 | ||
144 | return 0; | |
145 | #endif | |
146 | ||
147 | #ifdef HAVE_TERMIO | |
148 | if (ioctl (scb->fd, TCSETA, &state->termio) < 0) | |
149 | return -1; | |
150 | return 0; | |
151 | #endif | |
152 | ||
153 | #ifdef HAVE_SGTTY | |
154 | if (ioctl (scb->fd, TIOCSETN, &state->sgttyb) < 0) | |
155 | return -1; | |
156 | if (ioctl (scb->fd, TIOCSETC, &state->tc) < 0) | |
157 | return -1; | |
158 | if (ioctl (scb->fd, TIOCSLTC, &state->ltc) < 0) | |
159 | return -1; | |
160 | if (ioctl (scb->fd, TIOCLSET, &state->lmode) < 0) | |
161 | return -1; | |
162 | ||
163 | return 0; | |
164 | #endif | |
165 | } | |
166 | ||
167 | static serial_ttystate | |
c2c6d25f | 168 | hardwire_get_tty_state (serial_t scb) |
c906108c SS |
169 | { |
170 | struct hardwire_ttystate *state; | |
171 | ||
c5aa993b | 172 | state = (struct hardwire_ttystate *) xmalloc (sizeof *state); |
c906108c | 173 | |
c5aa993b | 174 | if (get_tty_state (scb, state)) |
c906108c SS |
175 | return NULL; |
176 | ||
c5aa993b | 177 | return (serial_ttystate) state; |
c906108c SS |
178 | } |
179 | ||
180 | static int | |
c2c6d25f | 181 | hardwire_set_tty_state (serial_t scb, serial_ttystate ttystate) |
c906108c SS |
182 | { |
183 | struct hardwire_ttystate *state; | |
184 | ||
c5aa993b | 185 | state = (struct hardwire_ttystate *) ttystate; |
c906108c | 186 | |
c5aa993b | 187 | return set_tty_state (scb, state); |
c906108c SS |
188 | } |
189 | ||
190 | static int | |
c2c6d25f JM |
191 | hardwire_noflush_set_tty_state (serial_t scb, |
192 | serial_ttystate new_ttystate, | |
193 | serial_ttystate old_ttystate) | |
c906108c SS |
194 | { |
195 | struct hardwire_ttystate new_state; | |
196 | #ifdef HAVE_SGTTY | |
197 | struct hardwire_ttystate *state = (struct hardwire_ttystate *) old_ttystate; | |
198 | #endif | |
199 | ||
c5aa993b | 200 | new_state = *(struct hardwire_ttystate *) new_ttystate; |
c906108c SS |
201 | |
202 | /* Don't change in or out of raw mode; we don't want to flush input. | |
203 | termio and termios have no such restriction; for them flushing input | |
204 | is separate from setting the attributes. */ | |
205 | ||
206 | #ifdef HAVE_SGTTY | |
207 | if (state->sgttyb.sg_flags & RAW) | |
208 | new_state.sgttyb.sg_flags |= RAW; | |
209 | else | |
210 | new_state.sgttyb.sg_flags &= ~RAW; | |
211 | ||
212 | /* I'm not sure whether this is necessary; the manpage just mentions | |
213 | RAW not CBREAK. */ | |
214 | if (state->sgttyb.sg_flags & CBREAK) | |
215 | new_state.sgttyb.sg_flags |= CBREAK; | |
216 | else | |
217 | new_state.sgttyb.sg_flags &= ~CBREAK; | |
218 | #endif | |
219 | ||
220 | return set_tty_state (scb, &new_state); | |
221 | } | |
222 | ||
223 | static void | |
c2c6d25f JM |
224 | hardwire_print_tty_state (serial_t scb, |
225 | serial_ttystate ttystate, | |
226 | struct gdb_file *stream) | |
c906108c SS |
227 | { |
228 | struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate; | |
229 | int i; | |
230 | ||
231 | #ifdef HAVE_TERMIOS | |
c2c6d25f JM |
232 | fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n", |
233 | state->termios.c_iflag, state->termios.c_oflag); | |
234 | fprintf_filtered (stream, "c_cflag = 0x%x, c_lflag = 0x%x\n", | |
235 | state->termios.c_cflag, state->termios.c_lflag); | |
c906108c SS |
236 | #if 0 |
237 | /* This not in POSIX, and is not really documented by those systems | |
238 | which have it (at least not Sun). */ | |
c2c6d25f | 239 | fprintf_filtered (stream, "c_line = 0x%x.\n", state->termios.c_line); |
c906108c | 240 | #endif |
c2c6d25f | 241 | fprintf_filtered (stream, "c_cc: "); |
c906108c | 242 | for (i = 0; i < NCCS; i += 1) |
c2c6d25f JM |
243 | fprintf_filtered (stream, "0x%x ", state->termios.c_cc[i]); |
244 | fprintf_filtered (stream, "\n"); | |
c906108c SS |
245 | #endif |
246 | ||
247 | #ifdef HAVE_TERMIO | |
c2c6d25f JM |
248 | fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n", |
249 | state->termio.c_iflag, state->termio.c_oflag); | |
250 | fprintf_filtered (stream, "c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n", | |
251 | state->termio.c_cflag, state->termio.c_lflag, | |
252 | state->termio.c_line); | |
253 | fprintf_filtered (stream, "c_cc: "); | |
c906108c | 254 | for (i = 0; i < NCC; i += 1) |
c2c6d25f JM |
255 | fprintf_filtered (stream, "0x%x ", state->termio.c_cc[i]); |
256 | fprintf_filtered (stream, "\n"); | |
c906108c SS |
257 | #endif |
258 | ||
259 | #ifdef HAVE_SGTTY | |
c2c6d25f JM |
260 | fprintf_filtered (stream, "sgttyb.sg_flags = 0x%x.\n", |
261 | state->sgttyb.sg_flags); | |
c906108c | 262 | |
c2c6d25f | 263 | fprintf_filtered (stream, "tchars: "); |
c5aa993b | 264 | for (i = 0; i < (int) sizeof (struct tchars); i++) |
c2c6d25f JM |
265 | fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->tc)[i]); |
266 | fprintf_filtered ("\n"); | |
c906108c | 267 | |
c2c6d25f | 268 | fprintf_filtered (stream, "ltchars: "); |
c5aa993b | 269 | for (i = 0; i < (int) sizeof (struct ltchars); i++) |
c2c6d25f JM |
270 | fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->ltc)[i]); |
271 | fprintf_filtered (stream, "\n"); | |
c906108c | 272 | |
c2c6d25f | 273 | fprintf_filtered (stream, "lmode: 0x%x\n", state->lmode); |
c906108c SS |
274 | #endif |
275 | } | |
276 | ||
277 | /* Wait for the output to drain away, as opposed to flushing (discarding) it */ | |
278 | ||
279 | static int | |
c2c6d25f | 280 | hardwire_drain_output (serial_t scb) |
c906108c SS |
281 | { |
282 | #ifdef HAVE_TERMIOS | |
283 | return tcdrain (scb->fd); | |
284 | #endif | |
285 | ||
286 | #ifdef HAVE_TERMIO | |
287 | return ioctl (scb->fd, TCSBRK, 1); | |
288 | #endif | |
289 | ||
290 | #ifdef HAVE_SGTTY | |
291 | /* Get the current state and then restore it using TIOCSETP, | |
292 | which should cause the output to drain and pending input | |
293 | to be discarded. */ | |
294 | { | |
295 | struct hardwire_ttystate state; | |
296 | if (get_tty_state (scb, &state)) | |
297 | { | |
298 | return (-1); | |
299 | } | |
300 | else | |
301 | { | |
302 | return (ioctl (scb->fd, TIOCSETP, &state.sgttyb)); | |
303 | } | |
304 | } | |
c5aa993b | 305 | #endif |
c906108c SS |
306 | } |
307 | ||
308 | static int | |
c2c6d25f | 309 | hardwire_flush_output (serial_t scb) |
c906108c SS |
310 | { |
311 | #ifdef HAVE_TERMIOS | |
312 | return tcflush (scb->fd, TCOFLUSH); | |
313 | #endif | |
314 | ||
315 | #ifdef HAVE_TERMIO | |
316 | return ioctl (scb->fd, TCFLSH, 1); | |
317 | #endif | |
318 | ||
319 | #ifdef HAVE_SGTTY | |
320 | /* This flushes both input and output, but we can't do better. */ | |
321 | return ioctl (scb->fd, TIOCFLUSH, 0); | |
c5aa993b | 322 | #endif |
c906108c SS |
323 | } |
324 | ||
325 | static int | |
c2c6d25f | 326 | hardwire_flush_input (serial_t scb) |
c906108c SS |
327 | { |
328 | scb->bufcnt = 0; | |
329 | scb->bufp = scb->buf; | |
330 | ||
331 | #ifdef HAVE_TERMIOS | |
332 | return tcflush (scb->fd, TCIFLUSH); | |
333 | #endif | |
334 | ||
335 | #ifdef HAVE_TERMIO | |
336 | return ioctl (scb->fd, TCFLSH, 0); | |
337 | #endif | |
338 | ||
339 | #ifdef HAVE_SGTTY | |
340 | /* This flushes both input and output, but we can't do better. */ | |
341 | return ioctl (scb->fd, TIOCFLUSH, 0); | |
c5aa993b | 342 | #endif |
c906108c SS |
343 | } |
344 | ||
345 | static int | |
c2c6d25f | 346 | hardwire_send_break (serial_t scb) |
c906108c SS |
347 | { |
348 | #ifdef HAVE_TERMIOS | |
349 | return tcsendbreak (scb->fd, 0); | |
350 | #endif | |
351 | ||
352 | #ifdef HAVE_TERMIO | |
353 | return ioctl (scb->fd, TCSBRK, 0); | |
354 | #endif | |
355 | ||
356 | #ifdef HAVE_SGTTY | |
357 | { | |
358 | int status; | |
359 | struct timeval timeout; | |
360 | ||
361 | status = ioctl (scb->fd, TIOCSBRK, 0); | |
362 | ||
363 | /* Can't use usleep; it doesn't exist in BSD 4.2. */ | |
364 | /* Note that if this select() is interrupted by a signal it will not wait | |
365 | the full length of time. I think that is OK. */ | |
366 | timeout.tv_sec = 0; | |
367 | timeout.tv_usec = 250000; | |
368 | select (0, 0, 0, 0, &timeout); | |
369 | status = ioctl (scb->fd, TIOCCBRK, 0); | |
370 | return status; | |
371 | } | |
c5aa993b | 372 | #endif |
c906108c SS |
373 | } |
374 | ||
375 | static void | |
c2c6d25f | 376 | hardwire_raw (serial_t scb) |
c906108c SS |
377 | { |
378 | struct hardwire_ttystate state; | |
379 | ||
c5aa993b JM |
380 | if (get_tty_state (scb, &state)) |
381 | fprintf_unfiltered (gdb_stderr, "get_tty_state failed: %s\n", safe_strerror (errno)); | |
c906108c SS |
382 | |
383 | #ifdef HAVE_TERMIOS | |
384 | state.termios.c_iflag = 0; | |
385 | state.termios.c_oflag = 0; | |
386 | state.termios.c_lflag = 0; | |
c5aa993b | 387 | state.termios.c_cflag &= ~(CSIZE | PARENB); |
c906108c SS |
388 | state.termios.c_cflag |= CLOCAL | CS8; |
389 | state.termios.c_cc[VMIN] = 0; | |
390 | state.termios.c_cc[VTIME] = 0; | |
391 | #endif | |
392 | ||
393 | #ifdef HAVE_TERMIO | |
394 | state.termio.c_iflag = 0; | |
395 | state.termio.c_oflag = 0; | |
396 | state.termio.c_lflag = 0; | |
c5aa993b | 397 | state.termio.c_cflag &= ~(CSIZE | PARENB); |
c906108c SS |
398 | state.termio.c_cflag |= CLOCAL | CS8; |
399 | state.termio.c_cc[VMIN] = 0; | |
400 | state.termio.c_cc[VTIME] = 0; | |
401 | #endif | |
402 | ||
403 | #ifdef HAVE_SGTTY | |
404 | state.sgttyb.sg_flags |= RAW | ANYP; | |
405 | state.sgttyb.sg_flags &= ~(CBREAK | ECHO); | |
406 | #endif | |
407 | ||
408 | scb->current_timeout = 0; | |
409 | ||
410 | if (set_tty_state (scb, &state)) | |
c5aa993b | 411 | fprintf_unfiltered (gdb_stderr, "set_tty_state failed: %s\n", safe_strerror (errno)); |
c906108c SS |
412 | } |
413 | ||
414 | /* Wait for input on scb, with timeout seconds. Returns 0 on success, | |
415 | otherwise SERIAL_TIMEOUT or SERIAL_ERROR. | |
416 | ||
417 | For termio{s}, we actually just setup VTIME if necessary, and let the | |
418 | timeout occur in the read() in hardwire_read(). | |
419 | */ | |
420 | ||
c2c6d25f JM |
421 | /* FIXME: Don't replace this with the equivalent ser_unix*() until the |
422 | old TERMIOS/SGTTY/... timer code has been flushed. cagney | |
423 | 1999-09-16. */ | |
424 | ||
c906108c | 425 | static int |
c2c6d25f | 426 | wait_for (serial_t scb, int timeout) |
c906108c | 427 | { |
c906108c SS |
428 | #ifdef HAVE_SGTTY |
429 | { | |
430 | struct timeval tv; | |
431 | fd_set readfds; | |
432 | ||
433 | FD_ZERO (&readfds); | |
434 | ||
435 | tv.tv_sec = timeout; | |
436 | tv.tv_usec = 0; | |
437 | ||
c5aa993b | 438 | FD_SET (scb->fd, &readfds); |
c906108c SS |
439 | |
440 | while (1) | |
441 | { | |
442 | int numfds; | |
443 | ||
444 | if (timeout >= 0) | |
c5aa993b | 445 | numfds = select (scb->fd + 1, &readfds, 0, 0, &tv); |
c906108c | 446 | else |
c5aa993b | 447 | numfds = select (scb->fd + 1, &readfds, 0, 0, 0); |
c906108c SS |
448 | |
449 | if (numfds <= 0) | |
450 | if (numfds == 0) | |
451 | return SERIAL_TIMEOUT; | |
452 | else if (errno == EINTR) | |
453 | continue; | |
454 | else | |
455 | return SERIAL_ERROR; /* Got an error from select or poll */ | |
456 | ||
457 | return 0; | |
458 | } | |
459 | } | |
c5aa993b | 460 | #endif /* HAVE_SGTTY */ |
c906108c SS |
461 | |
462 | #if defined HAVE_TERMIO || defined HAVE_TERMIOS | |
463 | if (timeout == scb->current_timeout) | |
464 | return 0; | |
465 | ||
466 | scb->current_timeout = timeout; | |
467 | ||
468 | { | |
469 | struct hardwire_ttystate state; | |
470 | ||
c5aa993b JM |
471 | if (get_tty_state (scb, &state)) |
472 | fprintf_unfiltered (gdb_stderr, "get_tty_state failed: %s\n", safe_strerror (errno)); | |
c906108c SS |
473 | |
474 | #ifdef HAVE_TERMIOS | |
475 | if (timeout < 0) | |
476 | { | |
477 | /* No timeout. */ | |
478 | state.termios.c_cc[VTIME] = 0; | |
479 | state.termios.c_cc[VMIN] = 1; | |
480 | } | |
481 | else | |
482 | { | |
483 | state.termios.c_cc[VMIN] = 0; | |
484 | state.termios.c_cc[VTIME] = timeout * 10; | |
485 | if (state.termios.c_cc[VTIME] != timeout * 10) | |
486 | { | |
487 | ||
488 | /* If c_cc is an 8-bit signed character, we can't go | |
489 | bigger than this. If it is always unsigned, we could use | |
490 | 25. */ | |
491 | ||
492 | scb->current_timeout = 12; | |
493 | state.termios.c_cc[VTIME] = scb->current_timeout * 10; | |
494 | scb->timeout_remaining = timeout - scb->current_timeout; | |
495 | } | |
496 | } | |
497 | #endif | |
498 | ||
499 | #ifdef HAVE_TERMIO | |
500 | if (timeout < 0) | |
501 | { | |
502 | /* No timeout. */ | |
503 | state.termio.c_cc[VTIME] = 0; | |
504 | state.termio.c_cc[VMIN] = 1; | |
505 | } | |
506 | else | |
507 | { | |
508 | state.termio.c_cc[VMIN] = 0; | |
509 | state.termio.c_cc[VTIME] = timeout * 10; | |
510 | if (state.termio.c_cc[VTIME] != timeout * 10) | |
511 | { | |
512 | /* If c_cc is an 8-bit signed character, we can't go | |
513 | bigger than this. If it is always unsigned, we could use | |
514 | 25. */ | |
515 | ||
516 | scb->current_timeout = 12; | |
517 | state.termio.c_cc[VTIME] = scb->current_timeout * 10; | |
518 | scb->timeout_remaining = timeout - scb->current_timeout; | |
519 | } | |
520 | } | |
521 | #endif | |
522 | ||
523 | if (set_tty_state (scb, &state)) | |
c5aa993b | 524 | fprintf_unfiltered (gdb_stderr, "set_tty_state failed: %s\n", safe_strerror (errno)); |
c906108c SS |
525 | |
526 | return 0; | |
527 | } | |
c5aa993b | 528 | #endif /* HAVE_TERMIO || HAVE_TERMIOS */ |
c906108c SS |
529 | } |
530 | ||
531 | /* Read a character with user-specified timeout. TIMEOUT is number of seconds | |
532 | to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns | |
533 | char if successful. Returns SERIAL_TIMEOUT if timeout expired, EOF if line | |
534 | dropped dead, or SERIAL_ERROR for any other error (see errno in that case). */ | |
c2c6d25f JM |
535 | |
536 | /* FIXME: cagney/1999-09-16: Don't replace this with the equivalent | |
537 | ser_unix*() until the old TERMIOS/SGTTY/... timer code has been | |
538 | flushed. */ | |
539 | ||
540 | /* NOTE: cagney/1999-09-16: This function is not identical to | |
541 | ser_unix_readchar() as part of replacing it with ser_unix*() | |
542 | merging will be required - this code handles the case where read() | |
543 | times out due to no data while ser_unix_readchar() doesn't expect | |
544 | that. */ | |
545 | ||
c906108c | 546 | static int |
c2c6d25f | 547 | hardwire_readchar (serial_t scb, int timeout) |
c906108c | 548 | { |
7a292a7a SS |
549 | int status, delta; |
550 | int detach = 0; | |
c906108c SS |
551 | |
552 | if (scb->bufcnt-- > 0) | |
553 | return *scb->bufp++; | |
554 | ||
c906108c SS |
555 | if (timeout > 0) |
556 | timeout++; | |
c906108c | 557 | |
7a292a7a SS |
558 | /* We have to be able to keep the GUI alive here, so we break the original |
559 | timeout into steps of 1 second, running the "keep the GUI alive" hook | |
560 | each time through the loop. | |
561 | Also, timeout = 0 means to poll, so we just set the delta to 0, so we | |
562 | will only go through the loop once. */ | |
c5aa993b | 563 | |
7a292a7a | 564 | delta = (timeout == 0 ? 0 : 1); |
c906108c SS |
565 | while (1) |
566 | { | |
c906108c | 567 | |
7a292a7a SS |
568 | /* N.B. The UI may destroy our world (for instance by calling |
569 | remote_stop,) in which case we want to get out of here as | |
570 | quickly as possible. It is not safe to touch scb, since | |
571 | someone else might have freed it. The ui_loop_hook signals that | |
572 | we should exit by returning 1. */ | |
573 | ||
c906108c | 574 | if (ui_loop_hook) |
c5aa993b | 575 | detach = ui_loop_hook (0); |
7a292a7a SS |
576 | |
577 | if (detach) | |
578 | return SERIAL_TIMEOUT; | |
579 | ||
580 | scb->timeout_remaining = (timeout < 0 ? timeout : timeout - delta); | |
581 | status = wait_for (scb, delta); | |
582 | ||
c906108c SS |
583 | if (status < 0) |
584 | return status; | |
585 | ||
c2c6d25f JM |
586 | /* NOTE: cagney/1999-09-17: See ser_unix_readchar() for reason |
587 | why ASYNC reads are character by character. */ | |
588 | ||
589 | scb->bufcnt = read (scb->fd, scb->buf, | |
590 | (SERIAL_IS_ASYNC_P (scb) ? 1 : BUFSIZ)); | |
c906108c SS |
591 | |
592 | if (scb->bufcnt <= 0) | |
593 | { | |
594 | if (scb->bufcnt == 0) | |
595 | { | |
596 | /* Zero characters means timeout (it could also be EOF, but | |
c5aa993b | 597 | we don't (yet at least) distinguish). */ |
c906108c SS |
598 | if (scb->timeout_remaining > 0) |
599 | { | |
600 | timeout = scb->timeout_remaining; | |
601 | continue; | |
602 | } | |
c5aa993b JM |
603 | else if (scb->timeout_remaining < 0) |
604 | continue; | |
c906108c SS |
605 | else |
606 | return SERIAL_TIMEOUT; | |
607 | } | |
608 | else if (errno == EINTR) | |
609 | continue; | |
610 | else | |
611 | return SERIAL_ERROR; /* Got an error from read */ | |
612 | } | |
613 | ||
614 | scb->bufcnt--; | |
615 | scb->bufp = scb->buf; | |
616 | return *scb->bufp++; | |
617 | } | |
618 | } | |
619 | ||
620 | #ifndef B19200 | |
621 | #define B19200 EXTA | |
622 | #endif | |
623 | ||
624 | #ifndef B38400 | |
625 | #define B38400 EXTB | |
626 | #endif | |
627 | ||
628 | /* Translate baud rates from integers to damn B_codes. Unix should | |
629 | have outgrown this crap years ago, but even POSIX wouldn't buck it. */ | |
630 | ||
631 | static struct | |
632 | { | |
633 | int rate; | |
634 | int code; | |
635 | } | |
636 | baudtab[] = | |
637 | { | |
c5aa993b JM |
638 | { |
639 | 50, B50 | |
640 | } | |
641 | , | |
642 | { | |
643 | 75, B75 | |
644 | } | |
645 | , | |
646 | { | |
647 | 110, B110 | |
648 | } | |
649 | , | |
650 | { | |
651 | 134, B134 | |
652 | } | |
653 | , | |
654 | { | |
655 | 150, B150 | |
656 | } | |
657 | , | |
658 | { | |
659 | 200, B200 | |
660 | } | |
661 | , | |
662 | { | |
663 | 300, B300 | |
664 | } | |
665 | , | |
666 | { | |
667 | 600, B600 | |
668 | } | |
669 | , | |
670 | { | |
671 | 1200, B1200 | |
672 | } | |
673 | , | |
674 | { | |
675 | 1800, B1800 | |
676 | } | |
677 | , | |
678 | { | |
679 | 2400, B2400 | |
680 | } | |
681 | , | |
682 | { | |
683 | 4800, B4800 | |
684 | } | |
685 | , | |
686 | { | |
687 | 9600, B9600 | |
688 | } | |
689 | , | |
690 | { | |
691 | 19200, B19200 | |
692 | } | |
693 | , | |
694 | { | |
695 | 38400, B38400 | |
696 | } | |
697 | , | |
c906108c | 698 | #ifdef B57600 |
c5aa993b JM |
699 | { |
700 | 57600, B57600 | |
701 | } | |
702 | , | |
c906108c SS |
703 | #endif |
704 | #ifdef B115200 | |
c5aa993b JM |
705 | { |
706 | 115200, B115200 | |
707 | } | |
708 | , | |
c906108c SS |
709 | #endif |
710 | #ifdef B230400 | |
c5aa993b JM |
711 | { |
712 | 230400, B230400 | |
713 | } | |
714 | , | |
c906108c SS |
715 | #endif |
716 | #ifdef B460800 | |
c5aa993b JM |
717 | { |
718 | 460800, B460800 | |
719 | } | |
720 | , | |
c906108c | 721 | #endif |
c5aa993b JM |
722 | { |
723 | -1, -1 | |
724 | } | |
725 | , | |
c906108c SS |
726 | }; |
727 | ||
c5aa993b | 728 | static int |
c2c6d25f | 729 | rate_to_code (int rate) |
c906108c SS |
730 | { |
731 | int i; | |
732 | ||
733 | for (i = 0; baudtab[i].rate != -1; i++) | |
c5aa993b | 734 | if (rate == baudtab[i].rate) |
c906108c SS |
735 | return baudtab[i].code; |
736 | ||
737 | return -1; | |
738 | } | |
739 | ||
740 | static int | |
c2c6d25f | 741 | hardwire_setbaudrate (serial_t scb, int rate) |
c906108c SS |
742 | { |
743 | struct hardwire_ttystate state; | |
744 | ||
c5aa993b | 745 | if (get_tty_state (scb, &state)) |
c906108c SS |
746 | return -1; |
747 | ||
748 | #ifdef HAVE_TERMIOS | |
749 | cfsetospeed (&state.termios, rate_to_code (rate)); | |
750 | cfsetispeed (&state.termios, rate_to_code (rate)); | |
751 | #endif | |
752 | ||
753 | #ifdef HAVE_TERMIO | |
754 | #ifndef CIBAUD | |
755 | #define CIBAUD CBAUD | |
756 | #endif | |
757 | ||
758 | state.termio.c_cflag &= ~(CBAUD | CIBAUD); | |
759 | state.termio.c_cflag |= rate_to_code (rate); | |
760 | #endif | |
761 | ||
762 | #ifdef HAVE_SGTTY | |
763 | state.sgttyb.sg_ispeed = rate_to_code (rate); | |
764 | state.sgttyb.sg_ospeed = rate_to_code (rate); | |
765 | #endif | |
766 | ||
767 | return set_tty_state (scb, &state); | |
768 | } | |
769 | ||
770 | static int | |
c5aa993b | 771 | hardwire_setstopbits (scb, num) |
c906108c SS |
772 | serial_t scb; |
773 | int num; | |
774 | { | |
775 | struct hardwire_ttystate state; | |
776 | int newbit; | |
777 | ||
c5aa993b | 778 | if (get_tty_state (scb, &state)) |
c906108c SS |
779 | return -1; |
780 | ||
781 | switch (num) | |
782 | { | |
783 | case SERIAL_1_STOPBITS: | |
784 | newbit = 0; | |
785 | break; | |
786 | case SERIAL_1_AND_A_HALF_STOPBITS: | |
787 | case SERIAL_2_STOPBITS: | |
788 | newbit = 1; | |
789 | break; | |
790 | default: | |
791 | return 1; | |
792 | } | |
793 | ||
794 | #ifdef HAVE_TERMIOS | |
795 | if (!newbit) | |
796 | state.termios.c_cflag &= ~CSTOPB; | |
797 | else | |
c5aa993b | 798 | state.termios.c_cflag |= CSTOPB; /* two bits */ |
c906108c SS |
799 | #endif |
800 | ||
801 | #ifdef HAVE_TERMIO | |
802 | if (!newbit) | |
803 | state.termio.c_cflag &= ~CSTOPB; | |
804 | else | |
c5aa993b | 805 | state.termio.c_cflag |= CSTOPB; /* two bits */ |
c906108c SS |
806 | #endif |
807 | ||
808 | #ifdef HAVE_SGTTY | |
809 | return 0; /* sgtty doesn't support this */ | |
810 | #endif | |
811 | ||
812 | return set_tty_state (scb, &state); | |
813 | } | |
814 | ||
c2c6d25f JM |
815 | /* FIXME: Don't replace this with the equivalent ser_unix*() until the |
816 | old TERMIOS/SGTTY/... timer code has been flushed. cagney | |
817 | 1999-09-16. */ | |
818 | ||
c906108c | 819 | static int |
c2c6d25f | 820 | hardwire_write (serial_t scb, const char *str, int len) |
c906108c SS |
821 | { |
822 | int cc; | |
823 | ||
824 | while (len > 0) | |
825 | { | |
c5aa993b | 826 | cc = write (scb->fd, str, len); |
c906108c SS |
827 | |
828 | if (cc < 0) | |
c2c6d25f | 829 | return 1; |
c906108c SS |
830 | len -= cc; |
831 | str += cc; | |
832 | } | |
833 | return 0; | |
834 | } | |
835 | ||
c2c6d25f | 836 | |
c906108c | 837 | static void |
c2c6d25f | 838 | hardwire_close (serial_t scb) |
c906108c SS |
839 | { |
840 | if (scb->fd < 0) | |
841 | return; | |
842 | ||
c5aa993b | 843 | close (scb->fd); |
c906108c SS |
844 | scb->fd = -1; |
845 | } | |
846 | ||
c2c6d25f JM |
847 | \f |
848 | /* Generic operations used by all UNIX/FD based serial interfaces. */ | |
849 | ||
850 | serial_ttystate | |
851 | ser_unix_nop_get_tty_state (serial_t scb) | |
852 | { | |
853 | /* allocate a dummy */ | |
854 | return (serial_ttystate) XMALLOC (int); | |
855 | } | |
856 | ||
857 | int | |
858 | ser_unix_nop_set_tty_state (serial_t scb, serial_ttystate ttystate) | |
859 | { | |
860 | return 0; | |
861 | } | |
862 | ||
863 | void | |
864 | ser_unix_nop_raw (serial_t scb) | |
865 | { | |
866 | return; /* Always in raw mode */ | |
867 | } | |
868 | ||
869 | /* Wait for input on scb, with timeout seconds. Returns 0 on success, | |
870 | otherwise SERIAL_TIMEOUT or SERIAL_ERROR. */ | |
871 | ||
872 | int | |
873 | ser_unix_wait_for (serial_t scb, int timeout) | |
874 | { | |
875 | int numfds; | |
876 | struct timeval tv; | |
877 | fd_set readfds, exceptfds; | |
878 | ||
879 | FD_ZERO (&readfds); | |
880 | FD_ZERO (&exceptfds); | |
881 | ||
882 | tv.tv_sec = timeout; | |
883 | tv.tv_usec = 0; | |
884 | ||
885 | FD_SET (scb->fd, &readfds); | |
886 | FD_SET (scb->fd, &exceptfds); | |
887 | ||
888 | while (1) | |
889 | { | |
890 | if (timeout >= 0) | |
891 | numfds = select (scb->fd + 1, &readfds, 0, &exceptfds, &tv); | |
892 | else | |
893 | numfds = select (scb->fd + 1, &readfds, 0, &exceptfds, 0); | |
894 | ||
895 | if (numfds <= 0) | |
896 | { | |
897 | if (numfds == 0) | |
898 | return SERIAL_TIMEOUT; | |
899 | else if (errno == EINTR) | |
900 | continue; | |
901 | else | |
902 | return SERIAL_ERROR; /* Got an error from select or poll */ | |
903 | } | |
904 | ||
905 | return 0; | |
906 | } | |
907 | } | |
908 | ||
909 | /* Read a character with user-specified timeout. TIMEOUT is number of seconds | |
910 | to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns | |
911 | char if successful. Returns -2 if timeout expired, EOF if line dropped | |
912 | dead, or -3 for any other error (see errno in that case). */ | |
913 | ||
914 | int | |
915 | ser_unix_readchar (serial_t scb, int timeout) | |
916 | { | |
917 | int status; | |
918 | int delta; | |
919 | ||
920 | if (scb->bufcnt-- > 0) | |
921 | return *scb->bufp++; | |
922 | ||
923 | /* We have to be able to keep the GUI alive here, so we break the original | |
924 | timeout into steps of 1 second, running the "keep the GUI alive" hook | |
925 | each time through the loop. | |
926 | ||
927 | Also, timeout = 0 means to poll, so we just set the delta to 0, so we | |
928 | will only go through the loop once. */ | |
929 | ||
930 | delta = (timeout == 0 ? 0 : 1); | |
931 | while (1) | |
932 | { | |
933 | ||
934 | /* N.B. The UI may destroy our world (for instance by calling | |
935 | remote_stop,) in which case we want to get out of here as | |
936 | quickly as possible. It is not safe to touch scb, since | |
937 | someone else might have freed it. The ui_loop_hook signals that | |
938 | we should exit by returning 1. */ | |
939 | ||
940 | if (ui_loop_hook) | |
941 | { | |
942 | if (ui_loop_hook (0)) | |
943 | return SERIAL_TIMEOUT; | |
944 | } | |
945 | ||
946 | status = ser_unix_wait_for (scb, delta); | |
947 | timeout -= delta; | |
948 | ||
949 | /* If we got a character or an error back from wait_for, then we can | |
950 | break from the loop before the timeout is completed. */ | |
951 | ||
952 | if (status != SERIAL_TIMEOUT) | |
953 | { | |
954 | break; | |
955 | } | |
956 | ||
957 | /* If we have exhausted the original timeout, then generate | |
958 | a SERIAL_TIMEOUT, and pass it out of the loop. */ | |
959 | ||
960 | else if (timeout == 0) | |
961 | { | |
962 | status = SERIAL_TIMEOUT; | |
963 | break; | |
964 | } | |
965 | } | |
966 | ||
967 | if (status < 0) | |
968 | return status; | |
969 | ||
970 | while (1) | |
971 | { | |
972 | /* FIXME: cagney/1999-09-17: ASYNC: The ASYNC serial code needs | |
973 | to be modified so that it agressivly tries to drain its local | |
974 | input buffer. Until this is done, the read() below can only | |
975 | take in single characters. This is to ensure that | |
976 | unprocessed data doesn't end up sitting in the input fifo. */ | |
977 | scb->bufcnt = read (scb->fd, scb->buf, | |
978 | (SERIAL_IS_ASYNC_P (scb) ? 1 : BUFSIZ)); | |
979 | if (scb->bufcnt != -1 || errno != EINTR) | |
980 | break; | |
981 | } | |
982 | ||
983 | if (scb->bufcnt <= 0) | |
984 | { | |
985 | if (scb->bufcnt == 0) | |
986 | return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to | |
987 | distinguish between EOF & timeouts | |
988 | someday] */ | |
989 | else | |
990 | return SERIAL_ERROR; /* Got an error from read */ | |
991 | } | |
992 | ||
993 | scb->bufcnt--; | |
994 | scb->bufp = scb->buf; | |
995 | return *scb->bufp++; | |
996 | } | |
997 | ||
998 | int | |
999 | ser_unix_nop_noflush_set_tty_state (serial_t scb, | |
1000 | serial_ttystate new_ttystate, | |
1001 | serial_ttystate old_ttystate) | |
1002 | { | |
1003 | return 0; | |
1004 | } | |
1005 | ||
1006 | void | |
1007 | ser_unix_nop_print_tty_state (serial_t scb, | |
1008 | serial_ttystate ttystate, | |
1009 | struct gdb_file *stream) | |
1010 | { | |
1011 | /* Nothing to print. */ | |
1012 | return; | |
1013 | } | |
1014 | ||
1015 | int | |
1016 | ser_unix_nop_setbaudrate (serial_t scb, int rate) | |
1017 | { | |
1018 | return 0; /* Never fails! */ | |
1019 | } | |
1020 | ||
1021 | int | |
1022 | ser_unix_nop_setstopbits (serial_t scb, int num) | |
1023 | { | |
1024 | return 0; /* Never fails! */ | |
1025 | } | |
1026 | ||
1027 | int | |
1028 | ser_unix_write (serial_t scb, const char *str, int len) | |
1029 | { | |
1030 | int cc; | |
1031 | ||
1032 | while (len > 0) | |
1033 | { | |
1034 | cc = write (scb->fd, str, len); | |
1035 | ||
1036 | if (cc < 0) | |
1037 | return 1; | |
1038 | len -= cc; | |
1039 | str += cc; | |
1040 | } | |
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | int | |
1045 | ser_unix_nop_flush_output (serial_t scb) | |
1046 | { | |
1047 | return 0; | |
1048 | } | |
1049 | ||
1050 | int | |
1051 | ser_unix_nop_flush_input (serial_t scb) | |
1052 | { | |
1053 | return 0; | |
1054 | } | |
1055 | ||
1056 | int | |
1057 | ser_unix_nop_send_break (serial_t scb) | |
1058 | { | |
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | int | |
1063 | ser_unix_nop_drain_output (serial_t scb) | |
1064 | { | |
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | static void | |
1069 | ser_unix_event (int error, int fd, gdb_client_data context) | |
1070 | { | |
1071 | serial_t scb = context; | |
1072 | scb->async_handler (error, scb->async_context, fd); | |
1073 | } | |
1074 | ||
1075 | void | |
1076 | ser_unix_async (serial_t scb, | |
1077 | int async_p) | |
1078 | { | |
1079 | if (async_p) | |
1080 | { | |
1081 | add_file_handler (scb->fd, ser_unix_event, scb); | |
1082 | } | |
1083 | else | |
1084 | { | |
1085 | delete_file_handler (scb->fd); | |
1086 | } | |
1087 | } | |
c906108c SS |
1088 | |
1089 | void | |
c2c6d25f | 1090 | _initialize_ser_hardwire (void) |
c906108c | 1091 | { |
c2c6d25f JM |
1092 | struct serial_ops *ops = XMALLOC (struct serial_ops); |
1093 | memset (ops, sizeof (struct serial_ops), 0); | |
1094 | ops->name = "hardwire"; | |
1095 | ops->next = 0; | |
1096 | ops->open = hardwire_open; | |
1097 | ops->close = hardwire_close; | |
1098 | /* FIXME: Don't replace this with the equivalent ser_unix*() until | |
1099 | the old TERMIOS/SGTTY/... timer code has been flushed. cagney | |
1100 | 1999-09-16. */ | |
1101 | ops->readchar = hardwire_readchar; | |
1102 | /* FIXME: Don't replace this with the equivalent ser_unix*() until | |
1103 | the old TERMIOS/SGTTY/... timer code has been flushed. cagney | |
1104 | 1999-09-16. */ | |
1105 | ops->write = hardwire_write; | |
1106 | ops->flush_output = hardwire_flush_output; | |
1107 | ops->flush_input = hardwire_flush_input; | |
1108 | ops->send_break = hardwire_send_break; | |
1109 | ops->go_raw = hardwire_raw; | |
1110 | ops->get_tty_state = hardwire_get_tty_state; | |
1111 | ops->set_tty_state = hardwire_set_tty_state; | |
1112 | ops->print_tty_state = hardwire_print_tty_state; | |
1113 | ops->noflush_set_tty_state = hardwire_noflush_set_tty_state; | |
1114 | ops->setbaudrate = hardwire_setbaudrate; | |
1115 | ops->setstopbits = hardwire_setstopbits; | |
1116 | ops->drain_output = hardwire_drain_output; | |
1117 | ops->async = ser_unix_async; | |
1118 | serial_add_interface (ops); | |
c906108c | 1119 | } |