gdb/ser-unix.c

   1 /* Serial interface for local (hardwired) serial ports on Un*x like systems
   2
   3    Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
   4    2003, 2004, 2005 Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21    Boston, MA 02110-1301, USA.  */
  22
  23 #include "defs.h"
  24 #include "serial.h"
  25 #include "ser-base.h"
  26 #include "ser-unix.h"
  27
  28 #include <fcntl.h>
  29 #include <sys/types.h>
  30 #include "terminal.h"
  31 #include <sys/socket.h>
  32 #include <sys/time.h>
  33
  34 #include "gdb_select.h"
  35 #include "gdb_string.h"
  36
  37 #ifdef HAVE_TERMIOS
  38
  39 struct hardwire_ttystate
  40   {
  41     struct termios termios;
  42   };
  43 #endif /* termios */
  44
  45 #ifdef HAVE_TERMIO
  46
  47 /* It is believed that all systems which have added job control to SVR3
  48    (e.g. sco) have also added termios.  Even if not, trying to figure out
  49    all the variations (TIOCGPGRP vs. TCGETPGRP, etc.) would be pretty
  50    bewildering.  So we don't attempt it.  */
  51
  52 struct hardwire_ttystate
  53   {
  54     struct termio termio;
  55   };
  56 #endif /* termio */
  57
  58 #ifdef HAVE_SGTTY
  59 struct hardwire_ttystate
  60   {
  61     struct sgttyb sgttyb;
  62     struct tchars tc;
  63     struct ltchars ltc;
  64     /* Line discipline flags.  */
  65     int lmode;
  66   };
  67 #endif /* sgtty */
  68
  69 static int hardwire_open (struct serial *scb, const char *name);
  70 static void hardwire_raw (struct serial *scb);
  71 static int wait_for (struct serial *scb, int timeout);
  72 static int hardwire_readchar (struct serial *scb, int timeout);
  73 static int do_hardwire_readchar (struct serial *scb, int timeout);
  74 static int rate_to_code (int rate);
  75 static int hardwire_setbaudrate (struct serial *scb, int rate);
  76 static void hardwire_close (struct serial *scb);
  77 static int get_tty_state (struct serial *scb,
  78                           struct hardwire_ttystate * state);
  79 static int set_tty_state (struct serial *scb,
  80                           struct hardwire_ttystate * state);
  81 static serial_ttystate hardwire_get_tty_state (struct serial *scb);
  82 static int hardwire_set_tty_state (struct serial *scb, serial_ttystate state);
  83 static int hardwire_noflush_set_tty_state (struct serial *, serial_ttystate,
  84                                            serial_ttystate);
  85 static void hardwire_print_tty_state (struct serial *, serial_ttystate,
  86                                       struct ui_file *);
  87 static int hardwire_drain_output (struct serial *);
  88 static int hardwire_flush_output (struct serial *);
  89 static int hardwire_flush_input (struct serial *);
  90 static int hardwire_send_break (struct serial *);
  91 static int hardwire_setstopbits (struct serial *, int);
  92
  93 void _initialize_ser_hardwire (void);
  94
  95 /* Open up a real live device for serial I/O */
  96
  97 static int
  98 hardwire_open (struct serial *scb, const char *name)
  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
 108 get_tty_state (struct serial *scb, struct hardwire_ttystate *state)
 109 {
 110 #ifdef HAVE_TERMIOS
 111   if (tcgetattr (scb->fd, &state->termios) < 0)
 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
 138 set_tty_state (struct serial *scb, struct hardwire_ttystate *state)
 139 {
 140 #ifdef HAVE_TERMIOS
 141   if (tcsetattr (scb->fd, TCSANOW, &state->termios) < 0)
 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
 168 hardwire_get_tty_state (struct serial *scb)
 169 {
 170   struct hardwire_ttystate *state;
 171
 172   state = (struct hardwire_ttystate *) xmalloc (sizeof *state);
 173
 174   if (get_tty_state (scb, state))
 175     return NULL;
 176
 177   return (serial_ttystate) state;
 178 }
 179
 180 static int
 181 hardwire_set_tty_state (struct serial *scb, serial_ttystate ttystate)
 182 {
 183   struct hardwire_ttystate *state;
 184
 185   state = (struct hardwire_ttystate *) ttystate;
 186
 187   return set_tty_state (scb, state);
 188 }
 189
 190 static int
 191 hardwire_noflush_set_tty_state (struct serial *scb,
 192                                 serial_ttystate new_ttystate,
 193                                 serial_ttystate old_ttystate)
 194 {
 195   struct hardwire_ttystate new_state;
 196 #ifdef HAVE_SGTTY
 197   struct hardwire_ttystate *state = (struct hardwire_ttystate *) old_ttystate;
 198 #endif
 199
 200   new_state = *(struct hardwire_ttystate *) new_ttystate;
 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
 224 hardwire_print_tty_state (struct serial *scb,
 225                           serial_ttystate ttystate,
 226                           struct ui_file *stream)
 227 {
 228   struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate;
 229   int i;
 230
 231 #ifdef HAVE_TERMIOS
 232   fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n",
 233                     (int) state->termios.c_iflag,
 234                     (int) state->termios.c_oflag);
 235   fprintf_filtered (stream, "c_cflag = 0x%x, c_lflag = 0x%x\n",
 236                     (int) state->termios.c_cflag,
 237                     (int) state->termios.c_lflag);
 238 #if 0
 239   /* This not in POSIX, and is not really documented by those systems
 240      which have it (at least not Sun).  */
 241   fprintf_filtered (stream, "c_line = 0x%x.\n", state->termios.c_line);
 242 #endif
 243   fprintf_filtered (stream, "c_cc: ");
 244   for (i = 0; i < NCCS; i += 1)
 245     fprintf_filtered (stream, "0x%x ", state->termios.c_cc[i]);
 246   fprintf_filtered (stream, "\n");
 247 #endif
 248
 249 #ifdef HAVE_TERMIO
 250   fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n",
 251                     state->termio.c_iflag, state->termio.c_oflag);
 252   fprintf_filtered (stream, "c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
 253                     state->termio.c_cflag, state->termio.c_lflag,
 254                     state->termio.c_line);
 255   fprintf_filtered (stream, "c_cc: ");
 256   for (i = 0; i < NCC; i += 1)
 257     fprintf_filtered (stream, "0x%x ", state->termio.c_cc[i]);
 258   fprintf_filtered (stream, "\n");
 259 #endif
 260
 261 #ifdef HAVE_SGTTY
 262   fprintf_filtered (stream, "sgttyb.sg_flags = 0x%x.\n",
 263                     state->sgttyb.sg_flags);
 264
 265   fprintf_filtered (stream, "tchars: ");
 266   for (i = 0; i < (int) sizeof (struct tchars); i++)
 267     fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->tc)[i]);
 268   fprintf_filtered (stream, "\n");
 269
 270   fprintf_filtered (stream, "ltchars: ");
 271   for (i = 0; i < (int) sizeof (struct ltchars); i++)
 272     fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->ltc)[i]);
 273   fprintf_filtered (stream, "\n");
 274
 275   fprintf_filtered (stream, "lmode:  0x%x\n", state->lmode);
 276 #endif
 277 }
 278
 279 /* Wait for the output to drain away, as opposed to flushing (discarding) it */
 280
 281 static int
 282 hardwire_drain_output (struct serial *scb)
 283 {
 284 #ifdef HAVE_TERMIOS
 285   return tcdrain (scb->fd);
 286 #endif
 287
 288 #ifdef HAVE_TERMIO
 289   return ioctl (scb->fd, TCSBRK, 1);
 290 #endif
 291
 292 #ifdef HAVE_SGTTY
 293   /* Get the current state and then restore it using TIOCSETP,
 294      which should cause the output to drain and pending input
 295      to be discarded. */
 296   {
 297     struct hardwire_ttystate state;
 298     if (get_tty_state (scb, &state))
 299       {
 300         return (-1);
 301       }
 302     else
 303       {
 304         return (ioctl (scb->fd, TIOCSETP, &state.sgttyb));
 305       }
 306   }
 307 #endif
 308 }
 309
 310 static int
 311 hardwire_flush_output (struct serial *scb)
 312 {
 313 #ifdef HAVE_TERMIOS
 314   return tcflush (scb->fd, TCOFLUSH);
 315 #endif
 316
 317 #ifdef HAVE_TERMIO
 318   return ioctl (scb->fd, TCFLSH, 1);
 319 #endif
 320
 321 #ifdef HAVE_SGTTY
 322   /* This flushes both input and output, but we can't do better.  */
 323   return ioctl (scb->fd, TIOCFLUSH, 0);
 324 #endif
 325 }
 326
 327 static int
 328 hardwire_flush_input (struct serial *scb)
 329 {
 330   ser_base_flush_input (scb);
 331
 332 #ifdef HAVE_TERMIOS
 333   return tcflush (scb->fd, TCIFLUSH);
 334 #endif
 335
 336 #ifdef HAVE_TERMIO
 337   return ioctl (scb->fd, TCFLSH, 0);
 338 #endif
 339
 340 #ifdef HAVE_SGTTY
 341   /* This flushes both input and output, but we can't do better.  */
 342   return ioctl (scb->fd, TIOCFLUSH, 0);
 343 #endif
 344 }
 345
 346 static int
 347 hardwire_send_break (struct serial *scb)
 348 {
 349 #ifdef HAVE_TERMIOS
 350   return tcsendbreak (scb->fd, 0);
 351 #endif
 352
 353 #ifdef HAVE_TERMIO
 354   return ioctl (scb->fd, TCSBRK, 0);
 355 #endif
 356
 357 #ifdef HAVE_SGTTY
 358   {
 359     int status;
 360     struct timeval timeout;
 361
 362     status = ioctl (scb->fd, TIOCSBRK, 0);
 363
 364     /* Can't use usleep; it doesn't exist in BSD 4.2.  */
 365     /* Note that if this select() is interrupted by a signal it will not wait
 366        the full length of time.  I think that is OK.  */
 367     timeout.tv_sec = 0;
 368     timeout.tv_usec = 250000;
 369     gdb_select (0, 0, 0, 0, &timeout);
 370     status = ioctl (scb->fd, TIOCCBRK, 0);
 371     return status;
 372   }
 373 #endif
 374 }
 375
 376 static void
 377 hardwire_raw (struct serial *scb)
 378 {
 379   struct hardwire_ttystate state;
 380
 381   if (get_tty_state (scb, &state))
 382     fprintf_unfiltered (gdb_stderr, "get_tty_state failed: %s\n", safe_strerror (errno));
 383
 384 #ifdef HAVE_TERMIOS
 385   state.termios.c_iflag = 0;
 386   state.termios.c_oflag = 0;
 387   state.termios.c_lflag = 0;
 388   state.termios.c_cflag &= ~(CSIZE | PARENB);
 389   state.termios.c_cflag |= CLOCAL | CS8;
 390   state.termios.c_cc[VMIN] = 0;
 391   state.termios.c_cc[VTIME] = 0;
 392 #endif
 393
 394 #ifdef HAVE_TERMIO
 395   state.termio.c_iflag = 0;
 396   state.termio.c_oflag = 0;
 397   state.termio.c_lflag = 0;
 398   state.termio.c_cflag &= ~(CSIZE | PARENB);
 399   state.termio.c_cflag |= CLOCAL | CS8;
 400   state.termio.c_cc[VMIN] = 0;
 401   state.termio.c_cc[VTIME] = 0;
 402 #endif
 403
 404 #ifdef HAVE_SGTTY
 405   state.sgttyb.sg_flags |= RAW | ANYP;
 406   state.sgttyb.sg_flags &= ~(CBREAK | ECHO);
 407 #endif
 408
 409   scb->current_timeout = 0;
 410
 411   if (set_tty_state (scb, &state))
 412     fprintf_unfiltered (gdb_stderr, "set_tty_state failed: %s\n", safe_strerror (errno));
 413 }
 414
 415 /* Wait for input on scb, with timeout seconds.  Returns 0 on success,
 416    otherwise SERIAL_TIMEOUT or SERIAL_ERROR.
 417
 418    For termio{s}, we actually just setup VTIME if necessary, and let the
 419    timeout occur in the read() in hardwire_read().
 420  */
 421
 422 /* FIXME: cagney/1999-09-16: Don't replace this with the equivalent
 423    ser_base*() until the old TERMIOS/SGTTY/... timer code has been
 424    flushed. . */
 425
 426 /* NOTE: cagney/1999-09-30: Much of the code below is dead.  The only
 427    possible values of the TIMEOUT parameter are ONE and ZERO.
 428    Consequently all the code that tries to handle the possability of
 429    an overflowed timer is unnecessary. */
 430
 431 static int
 432 wait_for (struct serial *scb, int timeout)
 433 {
 434 #ifdef HAVE_SGTTY
 435   while (1)
 436     {
 437       struct timeval tv;
 438       fd_set readfds;
 439       int numfds;
 440
 441       /* NOTE: Some OS's can scramble the READFDS when the select()
 442          call fails (ex the kernel with Red Hat 5.2).  Initialize all
 443          arguments before each call. */
 444
 445       tv.tv_sec = timeout;
 446       tv.tv_usec = 0;
 447
 448       FD_ZERO (&readfds);
 449       FD_SET (scb->fd, &readfds);
 450
 451       if (timeout >= 0)
 452         numfds = gdb_select (scb->fd + 1, &readfds, 0, 0, &tv);
 453       else
 454         numfds = gdb_select (scb->fd + 1, &readfds, 0, 0, 0);
 455
 456       if (numfds <= 0)
 457         if (numfds == 0)
 458           return SERIAL_TIMEOUT;
 459         else if (errno == EINTR)
 460           continue;
 461         else
 462           return SERIAL_ERROR;  /* Got an error from select or poll */
 463
 464       return 0;
 465     }
 466 #endif /* HAVE_SGTTY */
 467
 468 #if defined HAVE_TERMIO || defined HAVE_TERMIOS
 469   if (timeout == scb->current_timeout)
 470     return 0;
 471
 472   scb->current_timeout = timeout;
 473
 474   {
 475     struct hardwire_ttystate state;
 476
 477     if (get_tty_state (scb, &state))
 478       fprintf_unfiltered (gdb_stderr, "get_tty_state failed: %s\n", safe_strerror (errno));
 479
 480 #ifdef HAVE_TERMIOS
 481     if (timeout < 0)
 482       {
 483         /* No timeout.  */
 484         state.termios.c_cc[VTIME] = 0;
 485         state.termios.c_cc[VMIN] = 1;
 486       }
 487     else
 488       {
 489         state.termios.c_cc[VMIN] = 0;
 490         state.termios.c_cc[VTIME] = timeout * 10;
 491         if (state.termios.c_cc[VTIME] != timeout * 10)
 492           {
 493
 494             /* If c_cc is an 8-bit signed character, we can't go
 495                bigger than this.  If it is always unsigned, we could use
 496                25.  */
 497
 498             scb->current_timeout = 12;
 499             state.termios.c_cc[VTIME] = scb->current_timeout * 10;
 500             scb->timeout_remaining = timeout - scb->current_timeout;
 501           }
 502       }
 503 #endif
 504
 505 #ifdef HAVE_TERMIO
 506     if (timeout < 0)
 507       {
 508         /* No timeout.  */
 509         state.termio.c_cc[VTIME] = 0;
 510         state.termio.c_cc[VMIN] = 1;
 511       }
 512     else
 513       {
 514         state.termio.c_cc[VMIN] = 0;
 515         state.termio.c_cc[VTIME] = timeout * 10;
 516         if (state.termio.c_cc[VTIME] != timeout * 10)
 517           {
 518             /* If c_cc is an 8-bit signed character, we can't go
 519                bigger than this.  If it is always unsigned, we could use
 520                25.  */
 521
 522             scb->current_timeout = 12;
 523             state.termio.c_cc[VTIME] = scb->current_timeout * 10;
 524             scb->timeout_remaining = timeout - scb->current_timeout;
 525           }
 526       }
 527 #endif
 528
 529     if (set_tty_state (scb, &state))
 530       fprintf_unfiltered (gdb_stderr, "set_tty_state failed: %s\n", safe_strerror (errno));
 531
 532     return 0;
 533   }
 534 #endif /* HAVE_TERMIO || HAVE_TERMIOS */
 535 }
 536
 537 /* Read a character with user-specified timeout.  TIMEOUT is number of seconds
 538    to wait, or -1 to wait forever.  Use timeout of 0 to effect a poll.  Returns
 539    char if successful.  Returns SERIAL_TIMEOUT if timeout expired, EOF if line
 540    dropped dead, or SERIAL_ERROR for any other error (see errno in that case).  */
 541
 542 /* FIXME: cagney/1999-09-16: Don't replace this with the equivalent
 543    ser_base*() until the old TERMIOS/SGTTY/... timer code has been
 544    flushed. */
 545
 546 /* NOTE: cagney/1999-09-16: This function is not identical to
 547    ser_base_readchar() as part of replacing it with ser_base*()
 548    merging will be required - this code handles the case where read()
 549    times out due to no data while ser_base_readchar() doesn't expect
 550    that. */
 551
 552 static int
 553 do_hardwire_readchar (struct serial *scb, int timeout)
 554 {
 555   int status, delta;
 556   int detach = 0;
 557
 558   if (timeout > 0)
 559     timeout++;
 560
 561   /* We have to be able to keep the GUI alive here, so we break the
 562      original timeout into steps of 1 second, running the "keep the
 563      GUI alive" hook each time through the loop.
 564
 565      Also, timeout = 0 means to poll, so we just set the delta to 0,
 566      so we will only go through the loop once.  */
 567
 568   delta = (timeout == 0 ? 0 : 1);
 569   while (1)
 570     {
 571
 572       /* N.B. The UI may destroy our world (for instance by calling
 573          remote_stop,) in which case we want to get out of here as
 574          quickly as possible.  It is not safe to touch scb, since
 575          someone else might have freed it.  The
 576          deprecated_ui_loop_hook signals that we should exit by
 577          returning 1.  */
 578
 579       if (deprecated_ui_loop_hook)
 580         detach = deprecated_ui_loop_hook (0);
 581
 582       if (detach)
 583         return SERIAL_TIMEOUT;
 584
 585       scb->timeout_remaining = (timeout < 0 ? timeout : timeout - delta);
 586       status = wait_for (scb, delta);
 587
 588       if (status < 0)
 589         return status;
 590
 591       status = read (scb->fd, scb->buf, BUFSIZ);
 592
 593       if (status <= 0)
 594         {
 595           if (status == 0)
 596             {
 597               /* Zero characters means timeout (it could also be EOF, but
 598                  we don't (yet at least) distinguish).  */
 599               if (scb->timeout_remaining > 0)
 600                 {
 601                   timeout = scb->timeout_remaining;
 602                   continue;
 603                 }
 604               else if (scb->timeout_remaining < 0)
 605                 continue;
 606               else
 607                 return SERIAL_TIMEOUT;
 608             }
 609           else if (errno == EINTR)
 610             continue;
 611           else
 612             return SERIAL_ERROR;        /* Got an error from read */
 613         }
 614
 615       scb->bufcnt = status;
 616       scb->bufcnt--;
 617       scb->bufp = scb->buf;
 618       return *scb->bufp++;
 619     }
 620 }
 621
 622 static int
 623 hardwire_readchar (struct serial *scb, int timeout)
 624 {
 625   return generic_readchar (scb, timeout, do_hardwire_readchar);
 626 }
 627
 628
 629 #ifndef B19200
 630 #define B19200 EXTA
 631 #endif
 632
 633 #ifndef B38400
 634 #define B38400 EXTB
 635 #endif
 636
 637 /* Translate baud rates from integers to damn B_codes.  Unix should
 638    have outgrown this crap years ago, but even POSIX wouldn't buck it.  */
 639
 640 static struct
 641 {
 642   int rate;
 643   int code;
 644 }
 645 baudtab[] =
 646 {
 647   {
 648     50, B50
 649   }
 650   ,
 651   {
 652     75, B75
 653   }
 654   ,
 655   {
 656     110, B110
 657   }
 658   ,
 659   {
 660     134, B134
 661   }
 662   ,
 663   {
 664     150, B150
 665   }
 666   ,
 667   {
 668     200, B200
 669   }
 670   ,
 671   {
 672     300, B300
 673   }
 674   ,
 675   {
 676     600, B600
 677   }
 678   ,
 679   {
 680     1200, B1200
 681   }
 682   ,
 683   {
 684     1800, B1800
 685   }
 686   ,
 687   {
 688     2400, B2400
 689   }
 690   ,
 691   {
 692     4800, B4800
 693   }
 694   ,
 695   {
 696     9600, B9600
 697   }
 698   ,
 699   {
 700     19200, B19200
 701   }
 702   ,
 703   {
 704     38400, B38400
 705   }
 706   ,
 707 #ifdef B57600
 708   {
 709     57600, B57600
 710   }
 711   ,
 712 #endif
 713 #ifdef B115200
 714   {
 715     115200, B115200
 716   }
 717   ,
 718 #endif
 719 #ifdef B230400
 720   {
 721     230400, B230400
 722   }
 723   ,
 724 #endif
 725 #ifdef B460800
 726   {
 727     460800, B460800
 728   }
 729   ,
 730 #endif
 731   {
 732     -1, -1
 733   }
 734   ,
 735 };
 736
 737 static int
 738 rate_to_code (int rate)
 739 {
 740   int i;
 741
 742   for (i = 0; baudtab[i].rate != -1; i++)
 743     {
 744       /* test for perfect macth. */
 745       if (rate == baudtab[i].rate)
 746         return baudtab[i].code;
 747       else
 748         {
 749           /* check if it is in between valid values. */
 750           if (rate < baudtab[i].rate)
 751             {
 752               if (i)
 753                 {
 754                   warning (_("Invalid baud rate %d.  Closest values are %d and %d."),
 755                             rate, baudtab[i - 1].rate, baudtab[i].rate);
 756                 }
 757               else
 758                 {
 759                   warning (_("Invalid baud rate %d.  Minimum value is %d."),
 760                             rate, baudtab[0].rate);
 761                 }
 762               return -1;
 763             }
 764         }
 765     }
 766
 767   /* The requested speed was too large. */
 768   warning (_("Invalid baud rate %d.  Maximum value is %d."),
 769             rate, baudtab[i - 1].rate);
 770   return -1;
 771 }
 772
 773 static int
 774 hardwire_setbaudrate (struct serial *scb, int rate)
 775 {
 776   struct hardwire_ttystate state;
 777   int baud_code = rate_to_code (rate);
 778
 779   if (baud_code < 0)
 780     {
 781       /* The baud rate was not valid.
 782          A warning has already been issued. */
 783       errno = EINVAL;
 784       return -1;
 785     }
 786
 787   if (get_tty_state (scb, &state))
 788     return -1;
 789
 790 #ifdef HAVE_TERMIOS
 791   cfsetospeed (&state.termios, baud_code);
 792   cfsetispeed (&state.termios, baud_code);
 793 #endif
 794
 795 #ifdef HAVE_TERMIO
 796 #ifndef CIBAUD
 797 #define CIBAUD CBAUD
 798 #endif
 799
 800   state.termio.c_cflag &= ~(CBAUD | CIBAUD);
 801   state.termio.c_cflag |= baud_code;
 802 #endif
 803
 804 #ifdef HAVE_SGTTY
 805   state.sgttyb.sg_ispeed = baud_code;
 806   state.sgttyb.sg_ospeed = baud_code;
 807 #endif
 808
 809   return set_tty_state (scb, &state);
 810 }
 811
 812 static int
 813 hardwire_setstopbits (struct serial *scb, int num)
 814 {
 815   struct hardwire_ttystate state;
 816   int newbit;
 817
 818   if (get_tty_state (scb, &state))
 819     return -1;
 820
 821   switch (num)
 822     {
 823     case SERIAL_1_STOPBITS:
 824       newbit = 0;
 825       break;
 826     case SERIAL_1_AND_A_HALF_STOPBITS:
 827     case SERIAL_2_STOPBITS:
 828       newbit = 1;
 829       break;
 830     default:
 831       return 1;
 832     }
 833
 834 #ifdef HAVE_TERMIOS
 835   if (!newbit)
 836     state.termios.c_cflag &= ~CSTOPB;
 837   else
 838     state.termios.c_cflag |= CSTOPB;    /* two bits */
 839 #endif
 840
 841 #ifdef HAVE_TERMIO
 842   if (!newbit)
 843     state.termio.c_cflag &= ~CSTOPB;
 844   else
 845     state.termio.c_cflag |= CSTOPB;     /* two bits */
 846 #endif
 847
 848 #ifdef HAVE_SGTTY
 849   return 0;                     /* sgtty doesn't support this */
 850 #endif
 851
 852   return set_tty_state (scb, &state);
 853 }
 854
 855 static void
 856 hardwire_close (struct serial *scb)
 857 {
 858   if (scb->fd < 0)
 859     return;
 860
 861   close (scb->fd);
 862   scb->fd = -1;
 863 }
 864 \f
 865 \f
 866 void
 867 _initialize_ser_hardwire (void)
 868 {
 869   struct serial_ops *ops = XMALLOC (struct serial_ops);
 870   memset (ops, 0, sizeof (struct serial_ops));
 871   ops->name = "hardwire";
 872   ops->next = 0;
 873   ops->open = hardwire_open;
 874   ops->close = hardwire_close;
 875   /* FIXME: Don't replace this with the equivalent ser_base*() until
 876      the old TERMIOS/SGTTY/... timer code has been flushed. cagney
 877      1999-09-16. */
 878   ops->readchar = hardwire_readchar;
 879   ops->write = ser_base_write;
 880   ops->flush_output = hardwire_flush_output;
 881   ops->flush_input = hardwire_flush_input;
 882   ops->send_break = hardwire_send_break;
 883   ops->go_raw = hardwire_raw;
 884   ops->get_tty_state = hardwire_get_tty_state;
 885   ops->set_tty_state = hardwire_set_tty_state;
 886   ops->print_tty_state = hardwire_print_tty_state;
 887   ops->noflush_set_tty_state = hardwire_noflush_set_tty_state;
 888   ops->setbaudrate = hardwire_setbaudrate;
 889   ops->setstopbits = hardwire_setstopbits;
 890   ops->drain_output = hardwire_drain_output;
 891   ops->async = ser_base_async;
 892   ops->read_prim = ser_unix_read_prim;
 893   ops->write_prim = ser_unix_write_prim;
 894   serial_add_interface (ops);
 895 }
 896
 897 int
 898 ser_unix_read_prim (struct serial *scb, size_t count)
 899 {
 900   int status;
 901
 902   while (1)
 903     {
 904       status = read (scb->fd, scb->buf, count);
 905       if (status != -1 || errno != EINTR)
 906         break;
 907     }
 908   return status;
 909 }
 910
 911 int
 912 ser_unix_write_prim (struct serial *scb, const void *buf, size_t len)
 913 {
 914   /* ??? Historically, GDB has not retried calls to "write" that
 915      result in EINTR.  */
 916   return write (scb->fd, buf, len);
 917 }