readline/rltty.c

   1 /* rltty.c -- functions to prepare and restore the terminal for readline's
   2    use. */
   3
   4 /* Copyright (C) 1992-2005 Free Software Foundation, Inc.
   5
   6    This file is part of the GNU Readline Library (Readline), a library
   7    for reading lines of text with interactive input and history editing.
   8
   9    Readline is free software: you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation, either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    Readline is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with Readline.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #define READLINE_LIBRARY
  24
  25 #if defined (HAVE_CONFIG_H)
  26 #  include <config.h>
  27 #endif
  28
  29 #include <sys/types.h>
  30 #include <signal.h>
  31 #include <errno.h>
  32 #include <stdio.h>
  33
  34 #if defined (HAVE_UNISTD_H)
  35 #  include <unistd.h>
  36 #endif /* HAVE_UNISTD_H */
  37
  38 #include "rldefs.h"
  39
  40 #if defined (GWINSZ_IN_SYS_IOCTL)
  41 #  include <sys/ioctl.h>
  42 #endif /* GWINSZ_IN_SYS_IOCTL */
  43
  44 #include "rltty.h"
  45 #include "readline.h"
  46 #include "rlprivate.h"
  47
  48 #if !defined (errno)
  49 extern int errno;
  50 #endif /* !errno */
  51
  52 rl_vintfunc_t *rl_prep_term_function = rl_prep_terminal;
  53 rl_voidfunc_t *rl_deprep_term_function = rl_deprep_terminal;
  54
  55 static void set_winsize PARAMS((int));
  56
  57 /* **************************************************************** */
  58 /*                                                                  */
  59 /*                    Saving and Restoring the TTY                  */
  60 /*                                                                  */
  61 /* **************************************************************** */
  62
  63 /* Non-zero means that the terminal is in a prepped state. */
  64 static int terminal_prepped;
  65
  66 static _RL_TTY_CHARS _rl_tty_chars, _rl_last_tty_chars;
  67
  68 /* If non-zero, means that this process has called tcflow(fd, TCOOFF)
  69    and output is suspended. */
  70 #if defined (__ksr1__)
  71 static int ksrflow;
  72 #endif
  73
  74 /* Dummy call to force a backgrounded readline to stop before it tries
  75    to get the tty settings. */
  76 static void
  77 set_winsize (tty)
  78      int tty;
  79 {
  80 #if defined (TIOCGWINSZ)
  81   struct winsize w;
  82
  83   if (ioctl (tty, TIOCGWINSZ, &w) == 0)
  84       (void) ioctl (tty, TIOCSWINSZ, &w);
  85 #endif /* TIOCGWINSZ */
  86 }
  87
  88 #if defined (NO_TTY_DRIVER)
  89 /* Nothing */
  90 #elif defined (NEW_TTY_DRIVER)
  91
  92 /* Values for the `flags' field of a struct bsdtty.  This tells which
  93    elements of the struct bsdtty have been fetched from the system and
  94    are valid. */
  95 #define SGTTY_SET       0x01
  96 #define LFLAG_SET       0x02
  97 #define TCHARS_SET      0x04
  98 #define LTCHARS_SET     0x08
  99
 100 struct bsdtty {
 101   struct sgttyb sgttyb; /* Basic BSD tty driver information. */
 102   int lflag;            /* Local mode flags, like LPASS8. */
 103 #if defined (TIOCGETC)
 104   struct tchars tchars; /* Terminal special characters, including ^S and ^Q. */
 105 #endif
 106 #if defined (TIOCGLTC)
 107   struct ltchars ltchars; /* 4.2 BSD editing characters */
 108 #endif
 109   int flags;            /* Bitmap saying which parts of the struct are valid. */
 110 };
 111
 112 #define TIOTYPE struct bsdtty
 113
 114 static TIOTYPE otio;
 115
 116 static void save_tty_chars PARAMS((TIOTYPE *));
 117 static int _get_tty_settings PARAMS((int, TIOTYPE *));
 118 static int get_tty_settings PARAMS((int, TIOTYPE *));
 119 static int _set_tty_settings PARAMS((int, TIOTYPE *));
 120 static int set_tty_settings PARAMS((int, TIOTYPE *));
 121
 122 static void prepare_terminal_settings PARAMS((int, TIOTYPE, TIOTYPE *));
 123
 124 static void set_special_char PARAMS((Keymap, TIOTYPE *, int, rl_command_func_t));
 125
 126 static void
 127 save_tty_chars (tiop)
 128      TIOTYPE *tiop;
 129 {
 130   _rl_last_tty_chars = _rl_tty_chars;
 131
 132   if (tiop->flags & SGTTY_SET)
 133     {
 134       _rl_tty_chars.t_erase = tiop->sgttyb.sg_erase;
 135       _rl_tty_chars.t_kill = tiop->sgttyb.sg_kill;
 136     }
 137
 138   if (tiop->flags & TCHARS_SET)
 139     {
 140       _rl_intr_char = _rl_tty_chars.t_intr = tiop->tchars.t_intrc;
 141       _rl_quit_char = _rl_tty_chars.t_quit = tiop->tchars.t_quitc;
 142
 143       _rl_tty_chars.t_start = tiop->tchars.t_startc;
 144       _rl_tty_chars.t_stop = tiop->tchars.t_stopc;
 145       _rl_tty_chars.t_eof = tiop->tchars.t_eofc;
 146       _rl_tty_chars.t_eol = '\n';
 147       _rl_tty_chars.t_eol2 = tiop->tchars.t_brkc;
 148     }
 149
 150   if (tiop->flags & LTCHARS_SET)
 151     {
 152       _rl_susp_char = _rl_tty_chars.t_susp = tiop->ltchars.t_suspc;
 153
 154       _rl_tty_chars.t_dsusp = tiop->ltchars.t_dsuspc;
 155       _rl_tty_chars.t_reprint = tiop->ltchars.t_rprntc;
 156       _rl_tty_chars.t_flush = tiop->ltchars.t_flushc;
 157       _rl_tty_chars.t_werase = tiop->ltchars.t_werasc;
 158       _rl_tty_chars.t_lnext = tiop->ltchars.t_lnextc;
 159     }
 160
 161   _rl_tty_chars.t_status = -1;
 162 }
 163
 164 static int
 165 get_tty_settings (tty, tiop)
 166      int tty;
 167      TIOTYPE *tiop;
 168 {
 169   set_winsize (tty);
 170
 171   tiop->flags = tiop->lflag = 0;
 172
 173   errno = 0;
 174   if (ioctl (tty, TIOCGETP, &(tiop->sgttyb)) < 0)
 175     return -1;
 176   tiop->flags |= SGTTY_SET;
 177
 178 #if defined (TIOCLGET)
 179   if (ioctl (tty, TIOCLGET, &(tiop->lflag)) == 0)
 180     tiop->flags |= LFLAG_SET;
 181 #endif
 182
 183 #if defined (TIOCGETC)
 184   if (ioctl (tty, TIOCGETC, &(tiop->tchars)) == 0)
 185     tiop->flags |= TCHARS_SET;
 186 #endif
 187
 188 #if defined (TIOCGLTC)
 189   if (ioctl (tty, TIOCGLTC, &(tiop->ltchars)) == 0)
 190     tiop->flags |= LTCHARS_SET;
 191 #endif
 192
 193   return 0;
 194 }
 195
 196 static int
 197 set_tty_settings (tty, tiop)
 198      int tty;
 199      TIOTYPE *tiop;
 200 {
 201   if (tiop->flags & SGTTY_SET)
 202     {
 203       ioctl (tty, TIOCSETN, &(tiop->sgttyb));
 204       tiop->flags &= ~SGTTY_SET;
 205     }
 206   _rl_echoing_p = 1;
 207
 208 #if defined (TIOCLSET)
 209   if (tiop->flags & LFLAG_SET)
 210     {
 211       ioctl (tty, TIOCLSET, &(tiop->lflag));
 212       tiop->flags &= ~LFLAG_SET;
 213     }
 214 #endif
 215
 216 #if defined (TIOCSETC)
 217   if (tiop->flags & TCHARS_SET)
 218     {
 219       ioctl (tty, TIOCSETC, &(tiop->tchars));
 220       tiop->flags &= ~TCHARS_SET;
 221     }
 222 #endif
 223
 224 #if defined (TIOCSLTC)
 225   if (tiop->flags & LTCHARS_SET)
 226     {
 227       ioctl (tty, TIOCSLTC, &(tiop->ltchars));
 228       tiop->flags &= ~LTCHARS_SET;
 229     }
 230 #endif
 231
 232   return 0;
 233 }
 234
 235 static void
 236 prepare_terminal_settings (meta_flag, oldtio, tiop)
 237      int meta_flag;
 238      TIOTYPE oldtio, *tiop;
 239 {
 240   _rl_echoing_p = (oldtio.sgttyb.sg_flags & ECHO);
 241   _rl_echoctl = (oldtio.sgttyb.sg_flags & ECHOCTL);
 242
 243   /* Copy the original settings to the structure we're going to use for
 244      our settings. */
 245   tiop->sgttyb = oldtio.sgttyb;
 246   tiop->lflag = oldtio.lflag;
 247 #if defined (TIOCGETC)
 248   tiop->tchars = oldtio.tchars;
 249 #endif
 250 #if defined (TIOCGLTC)
 251   tiop->ltchars = oldtio.ltchars;
 252 #endif
 253   tiop->flags = oldtio.flags;
 254
 255   /* First, the basic settings to put us into character-at-a-time, no-echo
 256      input mode. */
 257   tiop->sgttyb.sg_flags &= ~(ECHO | CRMOD);
 258   tiop->sgttyb.sg_flags |= CBREAK;
 259
 260   /* If this terminal doesn't care how the 8th bit is used, then we can
 261      use it for the meta-key.  If only one of even or odd parity is
 262      specified, then the terminal is using parity, and we cannot. */
 263 #if !defined (ANYP)
 264 #  define ANYP (EVENP | ODDP)
 265 #endif
 266   if (((oldtio.sgttyb.sg_flags & ANYP) == ANYP) ||
 267       ((oldtio.sgttyb.sg_flags & ANYP) == 0))
 268     {
 269       tiop->sgttyb.sg_flags |= ANYP;
 270
 271       /* Hack on local mode flags if we can. */
 272 #if defined (TIOCLGET)
 273 #  if defined (LPASS8)
 274       tiop->lflag |= LPASS8;
 275 #  endif /* LPASS8 */
 276 #endif /* TIOCLGET */
 277     }
 278
 279 #if defined (TIOCGETC)
 280 #  if defined (USE_XON_XOFF)
 281   /* Get rid of terminal output start and stop characters. */
 282   tiop->tchars.t_stopc = -1; /* C-s */
 283   tiop->tchars.t_startc = -1; /* C-q */
 284
 285   /* If there is an XON character, bind it to restart the output. */
 286   if (oldtio.tchars.t_startc != -1)
 287     rl_bind_key (oldtio.tchars.t_startc, rl_restart_output);
 288 #  endif /* USE_XON_XOFF */
 289
 290   /* If there is an EOF char, bind _rl_eof_char to it. */
 291   if (oldtio.tchars.t_eofc != -1)
 292     _rl_eof_char = oldtio.tchars.t_eofc;
 293
 294 #  if defined (NO_KILL_INTR)
 295   /* Get rid of terminal-generated SIGQUIT and SIGINT. */
 296   tiop->tchars.t_quitc = -1; /* C-\ */
 297   tiop->tchars.t_intrc = -1; /* C-c */
 298 #  endif /* NO_KILL_INTR */
 299 #endif /* TIOCGETC */
 300
 301 #if defined (TIOCGLTC)
 302   /* Make the interrupt keys go away.  Just enough to make people happy. */
 303   tiop->ltchars.t_dsuspc = -1;  /* C-y */
 304   tiop->ltchars.t_lnextc = -1;  /* C-v */
 305 #endif /* TIOCGLTC */
 306 }
 307
 308 #else  /* !defined (NEW_TTY_DRIVER) */
 309
 310 #if !defined (VMIN)
 311 #  define VMIN VEOF
 312 #endif
 313
 314 #if !defined (VTIME)
 315 #  define VTIME VEOL
 316 #endif
 317
 318 #if defined (TERMIOS_TTY_DRIVER)
 319 #  define TIOTYPE struct termios
 320 #  define DRAIN_OUTPUT(fd)      tcdrain (fd)
 321 #  define GETATTR(tty, tiop)    (tcgetattr (tty, tiop))
 322 #  ifdef M_UNIX
 323 #    define SETATTR(tty, tiop)  (tcsetattr (tty, TCSANOW, tiop))
 324 #  else
 325 #    define SETATTR(tty, tiop)  (tcsetattr (tty, TCSADRAIN, tiop))
 326 #  endif /* !M_UNIX */
 327 #else
 328 #  define TIOTYPE struct termio
 329 #  define DRAIN_OUTPUT(fd)
 330 #  define GETATTR(tty, tiop)    (ioctl (tty, TCGETA, tiop))
 331 #  define SETATTR(tty, tiop)    (ioctl (tty, TCSETAW, tiop))
 332 #endif /* !TERMIOS_TTY_DRIVER */
 333
 334 static TIOTYPE otio;
 335
 336 static void save_tty_chars PARAMS((TIOTYPE *));
 337 static int _get_tty_settings PARAMS((int, TIOTYPE *));
 338 static int get_tty_settings PARAMS((int, TIOTYPE *));
 339 static int _set_tty_settings PARAMS((int, TIOTYPE *));
 340 static int set_tty_settings PARAMS((int, TIOTYPE *));
 341
 342 static void prepare_terminal_settings PARAMS((int, TIOTYPE, TIOTYPE *));
 343
 344 static void set_special_char PARAMS((Keymap, TIOTYPE *, int, rl_command_func_t));
 345 static void _rl_bind_tty_special_chars PARAMS((Keymap, TIOTYPE));
 346
 347 #if defined (FLUSHO)
 348 #  define OUTPUT_BEING_FLUSHED(tp)  (tp->c_lflag & FLUSHO)
 349 #else
 350 #  define OUTPUT_BEING_FLUSHED(tp)  0
 351 #endif
 352
 353 static void
 354 save_tty_chars (tiop)
 355      TIOTYPE *tiop;
 356 {
 357   _rl_last_tty_chars = _rl_tty_chars;
 358
 359   _rl_tty_chars.t_eof = tiop->c_cc[VEOF];
 360   _rl_tty_chars.t_eol = tiop->c_cc[VEOL];
 361 #ifdef VEOL2
 362   _rl_tty_chars.t_eol2 = tiop->c_cc[VEOL2];
 363 #endif
 364   _rl_tty_chars.t_erase = tiop->c_cc[VERASE];
 365 #ifdef VWERASE
 366   _rl_tty_chars.t_werase = tiop->c_cc[VWERASE];
 367 #endif
 368   _rl_tty_chars.t_kill = tiop->c_cc[VKILL];
 369 #ifdef VREPRINT
 370   _rl_tty_chars.t_reprint = tiop->c_cc[VREPRINT];
 371 #endif
 372   _rl_intr_char = _rl_tty_chars.t_intr = tiop->c_cc[VINTR];
 373   _rl_quit_char = _rl_tty_chars.t_quit = tiop->c_cc[VQUIT];
 374 #ifdef VSUSP
 375   _rl_susp_char = _rl_tty_chars.t_susp = tiop->c_cc[VSUSP];
 376 #endif
 377 #ifdef VDSUSP
 378   _rl_tty_chars.t_dsusp = tiop->c_cc[VDSUSP];
 379 #endif
 380 #ifdef VSTART
 381   _rl_tty_chars.t_start = tiop->c_cc[VSTART];
 382 #endif
 383 #ifdef VSTOP
 384   _rl_tty_chars.t_stop = tiop->c_cc[VSTOP];
 385 #endif
 386 #ifdef VLNEXT
 387   _rl_tty_chars.t_lnext = tiop->c_cc[VLNEXT];
 388 #endif
 389 #ifdef VDISCARD
 390   _rl_tty_chars.t_flush = tiop->c_cc[VDISCARD];
 391 #endif
 392 #ifdef VSTATUS
 393   _rl_tty_chars.t_status = tiop->c_cc[VSTATUS];
 394 #endif
 395 }
 396
 397 #if defined (_AIX) || defined (_AIX41)
 398 /* Currently this is only used on AIX */
 399 static void
 400 rltty_warning (msg)
 401      char *msg;
 402 {
 403   _rl_errmsg ("warning: %s", msg);
 404 }
 405 #endif
 406
 407 #if defined (_AIX)
 408 void
 409 setopost(tp)
 410 TIOTYPE *tp;
 411 {
 412   if ((tp->c_oflag & OPOST) == 0)
 413     {
 414       _rl_errmsg ("warning: turning on OPOST for terminal\r");
 415       tp->c_oflag |= OPOST|ONLCR;
 416     }
 417 }
 418 #endif
 419
 420 static int
 421 _get_tty_settings (tty, tiop)
 422      int tty;
 423      TIOTYPE *tiop;
 424 {
 425   int ioctl_ret;
 426
 427   while (1)
 428     {
 429       ioctl_ret = GETATTR (tty, tiop);
 430       if (ioctl_ret < 0)
 431         {
 432           if (errno != EINTR)
 433             return -1;
 434           else
 435             continue;
 436         }
 437       if (OUTPUT_BEING_FLUSHED (tiop))
 438         {
 439 #if defined (FLUSHO)
 440           _rl_errmsg ("warning: turning off output flushing");
 441           tiop->c_lflag &= ~FLUSHO;
 442           break;
 443 #else
 444           continue;
 445 #endif
 446         }
 447       break;
 448     }
 449
 450   return 0;
 451 }
 452
 453 static int
 454 get_tty_settings (tty, tiop)
 455      int tty;
 456      TIOTYPE *tiop;
 457 {
 458   set_winsize (tty);
 459
 460   errno = 0;
 461   if (_get_tty_settings (tty, tiop) < 0)
 462     return -1;
 463
 464 #if defined (_AIX)
 465   setopost(tiop);
 466 #endif
 467
 468   return 0;
 469 }
 470
 471 static int
 472 _set_tty_settings (tty, tiop)
 473      int tty;
 474      TIOTYPE *tiop;
 475 {
 476   while (SETATTR (tty, tiop) < 0)
 477     {
 478       if (errno != EINTR)
 479         return -1;
 480       errno = 0;
 481     }
 482   return 0;
 483 }
 484
 485 static int
 486 set_tty_settings (tty, tiop)
 487      int tty;
 488      TIOTYPE *tiop;
 489 {
 490   if (_set_tty_settings (tty, tiop) < 0)
 491     return -1;
 492
 493 #if 0
 494
 495 #if defined (TERMIOS_TTY_DRIVER)
 496 #  if defined (__ksr1__)
 497   if (ksrflow)
 498     {
 499       ksrflow = 0;
 500       tcflow (tty, TCOON);
 501     }
 502 #  else /* !ksr1 */
 503   tcflow (tty, TCOON);          /* Simulate a ^Q. */
 504 #  endif /* !ksr1 */
 505 #else
 506   ioctl (tty, TCXONC, 1);       /* Simulate a ^Q. */
 507 #endif /* !TERMIOS_TTY_DRIVER */
 508
 509 #endif /* 0 */
 510
 511   return 0;
 512 }
 513
 514 static void
 515 prepare_terminal_settings (meta_flag, oldtio, tiop)
 516      int meta_flag;
 517      TIOTYPE oldtio, *tiop;
 518 {
 519   _rl_echoing_p = (oldtio.c_lflag & ECHO);
 520 #if defined (ECHOCTL)
 521   _rl_echoctl = (oldtio.c_lflag & ECHOCTL);
 522 #endif
 523
 524   tiop->c_lflag &= ~(ICANON | ECHO);
 525
 526   if ((unsigned char) oldtio.c_cc[VEOF] != (unsigned char) _POSIX_VDISABLE)
 527     _rl_eof_char = oldtio.c_cc[VEOF];
 528
 529 #if defined (USE_XON_XOFF)
 530 #if defined (IXANY)
 531   tiop->c_iflag &= ~(IXON | IXOFF | IXANY);
 532 #else
 533   /* `strict' Posix systems do not define IXANY. */
 534   tiop->c_iflag &= ~(IXON | IXOFF);
 535 #endif /* IXANY */
 536 #endif /* USE_XON_XOFF */
 537
 538   /* Only turn this off if we are using all 8 bits. */
 539   if (((tiop->c_cflag & CSIZE) == CS8) || meta_flag)
 540     tiop->c_iflag &= ~(ISTRIP | INPCK);
 541
 542   /* Make sure we differentiate between CR and NL on input. */
 543   tiop->c_iflag &= ~(ICRNL | INLCR);
 544
 545 #if !defined (HANDLE_SIGNALS)
 546   tiop->c_lflag &= ~ISIG;
 547 #else
 548   tiop->c_lflag |= ISIG;
 549 #endif
 550
 551   tiop->c_cc[VMIN] = 1;
 552   tiop->c_cc[VTIME] = 0;
 553
 554 #if defined (FLUSHO)
 555   if (OUTPUT_BEING_FLUSHED (tiop))
 556     {
 557       tiop->c_lflag &= ~FLUSHO;
 558       oldtio.c_lflag &= ~FLUSHO;
 559     }
 560 #endif
 561
 562   /* Turn off characters that we need on Posix systems with job control,
 563      just to be sure.  This includes ^Y and ^V.  This should not really
 564      be necessary.  */
 565 #if defined (TERMIOS_TTY_DRIVER) && defined (_POSIX_VDISABLE)
 566
 567 #if defined (VLNEXT)
 568   tiop->c_cc[VLNEXT] = _POSIX_VDISABLE;
 569 #endif
 570
 571 #if defined (VDSUSP)
 572   tiop->c_cc[VDSUSP] = _POSIX_VDISABLE;
 573 #endif
 574
 575 #endif /* TERMIOS_TTY_DRIVER && _POSIX_VDISABLE */
 576 }
 577 #endif  /* !NEW_TTY_DRIVER */
 578
 579 /* Put the terminal in CBREAK mode so that we can detect key presses. */
 580 #if defined (NO_TTY_DRIVER)
 581 void
 582 rl_prep_terminal (meta_flag)
 583      int meta_flag;
 584 {
 585   _rl_echoing_p = 1;
 586 }
 587
 588 void
 589 rl_deprep_terminal ()
 590 {
 591 }
 592
 593 #else /* ! NO_TTY_DRIVER */
 594 void
 595 rl_prep_terminal (meta_flag)
 596      int meta_flag;
 597 {
 598   int tty;
 599   TIOTYPE tio;
 600
 601   if (terminal_prepped)
 602     return;
 603
 604   /* Try to keep this function from being INTerrupted. */
 605   _rl_block_sigint ();
 606
 607   tty = rl_instream ? fileno (rl_instream) : fileno (stdin);
 608
 609   if (get_tty_settings (tty, &tio) < 0)
 610     {
 611 #if defined (ENOTSUP)
 612       /* MacOS X and Linux, at least, lie about the value of errno if
 613          tcgetattr fails. */
 614       if (errno == ENOTTY || errno == EINVAL || errno == ENOTSUP)
 615 #else
 616       if (errno == ENOTTY || errno == EINVAL)
 617 #endif
 618         _rl_echoing_p = 1;              /* XXX */
 619
 620       _rl_release_sigint ();
 621       return;
 622     }
 623
 624   otio = tio;
 625
 626   if (_rl_bind_stty_chars)
 627     {
 628 #if defined (VI_MODE)
 629       /* If editing in vi mode, make sure we restore the bindings in the
 630          insertion keymap no matter what keymap we ended up in. */
 631       if (rl_editing_mode == vi_mode)
 632         rl_tty_unset_default_bindings (vi_insertion_keymap);
 633       else
 634 #endif
 635         rl_tty_unset_default_bindings (_rl_keymap);
 636     }
 637   save_tty_chars (&otio);
 638   RL_SETSTATE(RL_STATE_TTYCSAVED);
 639   if (_rl_bind_stty_chars)
 640     {
 641 #if defined (VI_MODE)
 642       /* If editing in vi mode, make sure we set the bindings in the
 643          insertion keymap no matter what keymap we ended up in. */
 644       if (rl_editing_mode == vi_mode)
 645         _rl_bind_tty_special_chars (vi_insertion_keymap, tio);
 646       else
 647 #endif
 648         _rl_bind_tty_special_chars (_rl_keymap, tio);
 649     }
 650
 651   prepare_terminal_settings (meta_flag, otio, &tio);
 652
 653   if (set_tty_settings (tty, &tio) < 0)
 654     {
 655       _rl_release_sigint ();
 656       return;
 657     }
 658
 659   if (_rl_enable_keypad)
 660     _rl_control_keypad (1);
 661
 662   fflush (rl_outstream);
 663   terminal_prepped = 1;
 664   RL_SETSTATE(RL_STATE_TERMPREPPED);
 665
 666   _rl_release_sigint ();
 667 }
 668
 669 /* Restore the terminal's normal settings and modes. */
 670 void
 671 rl_deprep_terminal ()
 672 {
 673   int tty;
 674
 675   if (!terminal_prepped)
 676     return;
 677
 678   /* Try to keep this function from being interrupted. */
 679   _rl_block_sigint ();
 680
 681   tty = rl_instream ? fileno (rl_instream) : fileno (stdout);
 682
 683   if (_rl_enable_keypad)
 684     _rl_control_keypad (0);
 685
 686   fflush (rl_outstream);
 687
 688   if (set_tty_settings (tty, &otio) < 0)
 689     {
 690       _rl_release_sigint ();
 691       return;
 692     }
 693
 694   terminal_prepped = 0;
 695   RL_UNSETSTATE(RL_STATE_TERMPREPPED);
 696
 697   _rl_release_sigint ();
 698 }
 699 #endif /* !NO_TTY_DRIVER */
 700 \f
 701 /* **************************************************************** */
 702 /*                                                                  */
 703 /*                      Bogus Flow Control                          */
 704 /*                                                                  */
 705 /* **************************************************************** */
 706
 707 int
 708 rl_restart_output (count, key)
 709      int count, key;
 710 {
 711 #if defined (__MINGW32__)
 712   return 0;
 713 #else /* !__MING32__ */
 714
 715   int fildes = fileno (rl_outstream);
 716 #if defined (TIOCSTART)
 717 #if defined (apollo)
 718   ioctl (&fildes, TIOCSTART, 0);
 719 #else
 720   ioctl (fildes, TIOCSTART, 0);
 721 #endif /* apollo */
 722
 723 #else /* !TIOCSTART */
 724 #  if defined (TERMIOS_TTY_DRIVER)
 725 #    if defined (__ksr1__)
 726   if (ksrflow)
 727     {
 728       ksrflow = 0;
 729       tcflow (fildes, TCOON);
 730     }
 731 #    else /* !ksr1 */
 732   tcflow (fildes, TCOON);               /* Simulate a ^Q. */
 733 #    endif /* !ksr1 */
 734 #  else /* !TERMIOS_TTY_DRIVER */
 735 #    if defined (TCXONC)
 736   ioctl (fildes, TCXONC, TCOON);
 737 #    endif /* TCXONC */
 738 #  endif /* !TERMIOS_TTY_DRIVER */
 739 #endif /* !TIOCSTART */
 740
 741   return 0;
 742 #endif /* !__MINGW32__ */
 743 }
 744
 745 int
 746 rl_stop_output (count, key)
 747      int count, key;
 748 {
 749 #if defined (__MINGW32__)
 750   return 0;
 751 #else
 752
 753   int fildes = fileno (rl_instream);
 754
 755 #if defined (TIOCSTOP)
 756 # if defined (apollo)
 757   ioctl (&fildes, TIOCSTOP, 0);
 758 # else
 759   ioctl (fildes, TIOCSTOP, 0);
 760 # endif /* apollo */
 761 #else /* !TIOCSTOP */
 762 # if defined (TERMIOS_TTY_DRIVER)
 763 #  if defined (__ksr1__)
 764   ksrflow = 1;
 765 #  endif /* ksr1 */
 766   tcflow (fildes, TCOOFF);
 767 # else
 768 #   if defined (TCXONC)
 769   ioctl (fildes, TCXONC, TCOON);
 770 #   endif /* TCXONC */
 771 # endif /* !TERMIOS_TTY_DRIVER */
 772 #endif /* !TIOCSTOP */
 773
 774   return 0;
 775 #endif /* !__MINGW32__ */
 776 }
 777
 778 /* **************************************************************** */
 779 /*                                                                  */
 780 /*                      Default Key Bindings                        */
 781 /*                                                                  */
 782 /* **************************************************************** */
 783
 784 #if !defined (NO_TTY_DRIVER)
 785 #define SET_SPECIAL(sc, func)   set_special_char(kmap, &ttybuff, sc, func)
 786 #endif
 787
 788 #if defined (NO_TTY_DRIVER)
 789
 790 #define SET_SPECIAL(sc, func)
 791 #define RESET_SPECIAL(c)
 792
 793 #elif defined (NEW_TTY_DRIVER)
 794 static void
 795 set_special_char (kmap, tiop, sc, func)
 796      Keymap kmap;
 797      TIOTYPE *tiop;
 798      int sc;
 799      rl_command_func_t *func;
 800 {
 801   if (sc != -1 && kmap[(unsigned char)sc].type == ISFUNC)
 802     kmap[(unsigned char)sc].function = func;
 803 }
 804
 805 #define RESET_SPECIAL(c) \
 806   if (c != -1 && kmap[(unsigned char)c].type == ISFUNC) \
 807     kmap[(unsigned char)c].function = rl_insert;
 808
 809 static void
 810 _rl_bind_tty_special_chars (kmap, ttybuff)
 811      Keymap kmap;
 812      TIOTYPE ttybuff;
 813 {
 814   if (ttybuff.flags & SGTTY_SET)
 815     {
 816       SET_SPECIAL (ttybuff.sgttyb.sg_erase, rl_rubout);
 817       SET_SPECIAL (ttybuff.sgttyb.sg_kill, rl_unix_line_discard);
 818     }
 819
 820 #  if defined (TIOCGLTC)
 821   if (ttybuff.flags & LTCHARS_SET)
 822     {
 823       SET_SPECIAL (ttybuff.ltchars.t_werasc, rl_unix_word_rubout);
 824       SET_SPECIAL (ttybuff.ltchars.t_lnextc, rl_quoted_insert);
 825     }
 826 #  endif /* TIOCGLTC */
 827 }
 828
 829 #else /* !NEW_TTY_DRIVER */
 830 static void
 831 set_special_char (kmap, tiop, sc, func)
 832      Keymap kmap;
 833      TIOTYPE *tiop;
 834      int sc;
 835      rl_command_func_t *func;
 836 {
 837   unsigned char uc;
 838
 839   uc = tiop->c_cc[sc];
 840   if (uc != (unsigned char)_POSIX_VDISABLE && kmap[uc].type == ISFUNC)
 841     kmap[uc].function = func;
 842 }
 843
 844 /* used later */
 845 #define RESET_SPECIAL(uc) \
 846   if (uc != (unsigned char)_POSIX_VDISABLE && kmap[uc].type == ISFUNC) \
 847     kmap[uc].function = rl_insert;
 848
 849 static void
 850 _rl_bind_tty_special_chars (kmap, ttybuff)
 851      Keymap kmap;
 852      TIOTYPE ttybuff;
 853 {
 854   SET_SPECIAL (VERASE, rl_rubout);
 855   SET_SPECIAL (VKILL, rl_unix_line_discard);
 856
 857 #  if defined (VLNEXT) && defined (TERMIOS_TTY_DRIVER)
 858   SET_SPECIAL (VLNEXT, rl_quoted_insert);
 859 #  endif /* VLNEXT && TERMIOS_TTY_DRIVER */
 860
 861 #  if defined (VWERASE) && defined (TERMIOS_TTY_DRIVER)
 862   SET_SPECIAL (VWERASE, rl_unix_word_rubout);
 863 #  endif /* VWERASE && TERMIOS_TTY_DRIVER */
 864 }
 865
 866 #endif /* !NEW_TTY_DRIVER */
 867
 868 /* Set the system's default editing characters to their readline equivalents
 869    in KMAP.  Should be static, now that we have rl_tty_set_default_bindings. */
 870 void
 871 rltty_set_default_bindings (kmap)
 872      Keymap kmap;
 873 {
 874 #if !defined (NO_TTY_DRIVER)
 875   TIOTYPE ttybuff;
 876   int tty;
 877
 878   tty = fileno (rl_instream);
 879
 880   if (get_tty_settings (tty, &ttybuff) == 0)
 881     _rl_bind_tty_special_chars (kmap, ttybuff);
 882 #endif
 883 }
 884
 885 /* New public way to set the system default editing chars to their readline
 886    equivalents. */
 887 void
 888 rl_tty_set_default_bindings (kmap)
 889      Keymap kmap;
 890 {
 891   rltty_set_default_bindings (kmap);
 892 }
 893
 894 /* Rebind all of the tty special chars that readline worries about back
 895    to self-insert.  Call this before saving the current terminal special
 896    chars with save_tty_chars().  This only works on POSIX termios or termio
 897    systems. */
 898 void
 899 rl_tty_unset_default_bindings (kmap)
 900      Keymap kmap;
 901 {
 902   /* Don't bother before we've saved the tty special chars at least once. */
 903   if (RL_ISSTATE(RL_STATE_TTYCSAVED) == 0)
 904     return;
 905
 906   RESET_SPECIAL (_rl_tty_chars.t_erase);
 907   RESET_SPECIAL (_rl_tty_chars.t_kill);
 908
 909 #  if defined (VLNEXT) && defined (TERMIOS_TTY_DRIVER)
 910   RESET_SPECIAL (_rl_tty_chars.t_lnext);
 911 #  endif /* VLNEXT && TERMIOS_TTY_DRIVER */
 912
 913 #  if defined (VWERASE) && defined (TERMIOS_TTY_DRIVER)
 914   RESET_SPECIAL (_rl_tty_chars.t_werase);
 915 #  endif /* VWERASE && TERMIOS_TTY_DRIVER */
 916 }
 917
 918 #if defined (HANDLE_SIGNALS)
 919
 920 #if defined (NEW_TTY_DRIVER) || defined (NO_TTY_DRIVER)
 921 int
 922 _rl_disable_tty_signals ()
 923 {
 924   return 0;
 925 }
 926
 927 int
 928 _rl_restore_tty_signals ()
 929 {
 930   return 0;
 931 }
 932 #else
 933
 934 static TIOTYPE sigstty, nosigstty;
 935 static int tty_sigs_disabled = 0;
 936
 937 int
 938 _rl_disable_tty_signals ()
 939 {
 940   if (tty_sigs_disabled)
 941     return 0;
 942
 943   if (_get_tty_settings (fileno (rl_instream), &sigstty) < 0)
 944     return -1;
 945
 946   nosigstty = sigstty;
 947
 948   nosigstty.c_lflag &= ~ISIG;
 949   nosigstty.c_iflag &= ~IXON;
 950
 951   if (_set_tty_settings (fileno (rl_instream), &nosigstty) < 0)
 952     return (_set_tty_settings (fileno (rl_instream), &sigstty));
 953
 954   tty_sigs_disabled = 1;
 955   return 0;
 956 }
 957
 958 int
 959 _rl_restore_tty_signals ()
 960 {
 961   int r;
 962
 963   if (tty_sigs_disabled == 0)
 964     return 0;
 965
 966   r = _set_tty_settings (fileno (rl_instream), &sigstty);
 967
 968   if (r == 0)
 969     tty_sigs_disabled = 0;
 970
 971   return r;
 972 }
 973 #endif /* !NEW_TTY_DRIVER */
 974
 975 #endif /* HANDLE_SIGNALS */