code.delx.au - gnu-emacs/blob - src/systty.h

   1 /* systty.h - System-dependent definitions for terminals.
   2    Copyright (C) 1993 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs 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 1, or (at your option)
   9 any later version.
  10
  11 GNU Emacs 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.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #ifdef HAVE_TERMIOS
  21 #define HAVE_TCATTR
  22 #endif
  23
  24 /* If we defined these before and we are about to redefine them,
  25    prevent alarming warnings.  */
  26 #ifdef BSD_TERMIOS
  27 #undef NL0
  28 #undef NL1
  29 #undef CR0
  30 #undef CR1
  31 #undef CR2
  32 #undef CR3
  33 #undef TAB0
  34 #undef TAB1
  35 #undef TAB2
  36 #undef XTABS
  37 #undef BS0
  38 #undef BS1
  39 #undef FF0
  40 #undef FF1
  41 #undef ECHO
  42 #undef NOFLSH
  43 #undef TOSTOP
  44 #undef FLUSHO
  45 #undef PENDIN
  46 #endif
  47 \f
  48 /* Include the proper files.  */
  49 #ifdef HAVE_TERMIO
  50 #ifdef __DGUX
  51 #include <sys/ioctl.h>
  52 #endif
  53 #ifndef NO_TERMIO
  54 #include <termio.h>
  55 #endif /* not NO_TERMIO */
  56 #include <fcntl.h>
  57 #else
  58 #ifdef HAVE_TERMIOS
  59 #if defined(_AIX) && defined(_I386)
  60 #include <termios.h>            /* termios.h needs to be before termio.h */
  61 #include <termio.h>
  62 #else
  63 #ifndef NO_TERMIO
  64 #include <termio.h>
  65 #endif
  66 #include <termios.h>
  67 #endif /* _AIX && _I386 */
  68 #include <fcntl.h>
  69 #else /* neither HAVE_TERMIO nor HAVE_TERMIOS */
  70 #ifndef VMS
  71 #include <sgtty.h>
  72 #else /* VMS */
  73 #include <descrip.h>
  74 static struct iosb
  75 {
  76   short status;
  77   short offset;
  78   short termlen;
  79   short term;
  80 } input_iosb;
  81
  82 extern int waiting_for_ast;
  83 extern int stop_input;
  84 #if 0 /* VAX C doeasn't understand initializing declarations */
  85 extern int input_ef = 0;
  86 extern int timer_ef = 0;
  87 extern int process_ef = 0;
  88 #else
  89 extern int input_ef;
  90 extern int timer_ef;
  91 extern int process_ef;
  92 #endif
  93 extern int input_eflist;
  94 extern int timer_eflist;
  95
  96 static $DESCRIPTOR (input_dsc, "TT");
  97 static int terminator_mask[2] = { 0, 0 };
  98
  99 static struct sensemode {
 100   short status;
 101   unsigned char xmit_baud;
 102   unsigned char rcv_baud;
 103   unsigned char crfill;
 104   unsigned char lffill;
 105   unsigned char parity;
 106   unsigned char unused;
 107   char class;
 108   char type;
 109   short scr_wid;
 110   unsigned long tt_char : 24, scr_len : 8;
 111   unsigned long tt2_char;
 112 } sensemode_iosb;
 113 #endif /* VMS */
 114 #endif /* not HAVE_TERMIOS */
 115 #endif /* not HAVE_TERMIO */
 116
 117 #ifdef AIX
 118 /* Get files for keyboard remapping */
 119 #define HFNKEYS 2
 120 #include <sys/hft.h>
 121 #include <sys/devinfo.h>
 122 #endif
 123
 124 /* Get rid of LLITOUT in 4.1, since it is said to stimulate kernel bugs.  */
 125 #ifdef BSD4_1
 126 #undef LLITOUT
 127 #define LLITOUT 0
 128 #endif /* 4.1 */
 129
 130 #ifdef NEED_BSDTTY
 131 #include <sys/bsdtty.h>
 132 #endif
 133
 134 #if defined (HPUX) && defined (HAVE_PTYS)
 135 #include <sys/ptyio.h>
 136 #endif
 137
 138 #ifdef AIX
 139 #include <sys/pty.h>
 140 #include <unistd.h>
 141 #define UNISTD_H_INCLUDED
 142 #endif /* AIX */
 143
 144 #ifdef IRIX4
 145 /* Get _getpty prototype */
 146 #include <unistd.h>
 147 #define UNISTD_H_INCLUDED
 148 #endif
 149
 150 #if defined (POSIX) && !defined (UNISTD_H_INCLUDED) && defined (HAVE_UNISTD_H)
 151 #include <unistd.h>
 152 #define UNISTD_H_INCLUDED
 153 #endif
 154
 155 #ifdef SYSV_PTYS
 156 #include <sys/types.h>
 157 #include <sys/tty.h>
 158 #ifdef titan
 159 #include <sys/ttyhw.h>
 160 #include <sys/stream.h>
 161 #endif
 162 #ifndef NO_PTY_H
 163 #include <sys/pty.h>
 164 #endif
 165 #endif
 166
 167 /* saka@pfu.fujitsu.co.JP writes:
 168    FASYNC defined in this file. But, FASYNC don't working.
 169    so no problem, because unrequest_sigio only need. */
 170 #if defined (pfa)
 171 #include <sys/file.h>
 172 #endif
 173
 174 \f
 175 /* Special cases - inhibiting the use of certain features.  */
 176
 177 #ifdef APOLLO
 178 #undef TIOCSTART
 179 #endif
 180
 181 #ifdef XENIX
 182 #undef TIOCGETC  /* Avoid confusing some conditionals that test this.  */
 183 #endif
 184
 185 #ifdef BROKEN_TIOCGETC
 186 #undef TIOCGETC  /* Avoid confusing some conditionals that test this.  */
 187 #endif
 188
 189 /* UNIPLUS systems may have FIONREAD.  */
 190 #ifdef UNIPLUS
 191 #include <sys.ioctl.h>
 192 #endif
 193
 194 /* Allow m- file to inhibit use of FIONREAD.  */
 195 #ifdef BROKEN_FIONREAD
 196 #undef FIONREAD
 197 #undef ASYNC
 198 #endif
 199
 200 /* Interrupt input is not used if there is no FIONREAD.  */
 201 #ifndef FIONREAD
 202 #undef SIGIO
 203 #endif
 204
 205 /* On TERMIOS systems, the tcmumbleattr calls take care of these
 206    parameters, and it's a bad idea to use them (on AIX, it makes the
 207    tty hang for a long time).  */
 208 #if defined (TIOCGLTC) && !defined (HAVE_TERMIOS)
 209 #define HAVE_LTCHARS
 210 #endif
 211
 212 #if defined (TIOCGETC) && !defined (HAVE_TERMIOS)
 213 #define HAVE_TCHARS
 214 #endif
 215
 216 \f
 217 /* Try to establish the correct character to disable terminal functions
 218    in a system-independent manner.  Note that USG (at least) define
 219    _POSIX_VDISABLE as 0!  */
 220
 221 #ifdef _POSIX_VDISABLE
 222 #define CDISABLE _POSIX_VDISABLE
 223 #else /* not _POSIX_VDISABLE */
 224 #ifdef CDEL
 225 #undef CDISABLE
 226 #define CDISABLE CDEL
 227 #else /* not CDEL */
 228 #define CDISABLE 255
 229 #endif /* not CDEL */
 230 #endif /* not _POSIX_VDISABLE */
 231 \f
 232 /* Get the number of characters queued for output.  */
 233
 234 /* EMACS_OUTQSIZE(FD, int *SIZE) stores the number of characters
 235    queued for output to the terminal FD in *SIZE, if FD is a tty.
 236    Returns -1 if there was an error (i.e. FD is not a tty), 0
 237    otherwise.  */
 238 #ifdef TIOCOUTQ
 239 #define EMACS_OUTQSIZE(fd, size) (ioctl ((fd), TIOCOUTQ, (size)))
 240 #endif
 241
 242 #ifdef HAVE_TERMIO
 243 #ifdef TCOUTQ
 244 #undef EMACS_OUTQSIZE
 245 #define EMACS_OUTQSIZE(fd, size) (ioctl ((fd), TCOUTQ, (size)))
 246 #endif
 247 #endif
 248
 249 \f
 250 /* Manipulate a terminal's current process group.  */
 251
 252 /* EMACS_HAVE_TTY_PGRP is true if we can get and set the tty's current
 253    controlling process group.
 254
 255    EMACS_GET_TTY_PGRP(int FD, int *PGID) sets *PGID the terminal FD's
 256    current process group.  Return -1 if there is an error.
 257
 258    EMACS_SET_TTY_PGRP(int FD, int *PGID) sets the terminal FD's
 259    current process group to *PGID.  Return -1 if there is an error.  */
 260
 261 #ifdef HPUX
 262 /* HPUX tty process group stuff doesn't work, says the anonymous voice
 263    from the past.  */
 264 #else
 265 #ifdef TIOCGPGRP
 266 #define EMACS_HAVE_TTY_PGRP
 267 #else
 268 #ifdef HAVE_TERMIOS
 269 #define EMACS_HAVE_TTY_PGRP
 270 #endif
 271 #endif
 272 #endif
 273
 274 #ifdef EMACS_HAVE_TTY_PGRP
 275
 276 #if defined (HAVE_TERMIOS) && ! defined (BSD_TERMIOS)
 277
 278 #define EMACS_GET_TTY_PGRP(fd, pgid) (*(pgid) = tcgetpgrp ((fd)))
 279 #define EMACS_SET_TTY_PGRP(fd, pgid) (tcsetpgrp ((fd), *(pgid)))
 280
 281 #else
 282 #ifdef TIOCSPGRP
 283
 284 #define EMACS_GET_TTY_PGRP(fd, pgid) (ioctl ((fd), TIOCGPGRP, (pgid)))
 285 #define EMACS_SET_TTY_PGRP(fd, pgid) (ioctl ((fd), TIOCSPGRP, (pgid)))
 286
 287 #endif
 288 #endif
 289
 290 #else
 291
 292 /* Just ignore this for now and hope for the best */
 293 #define EMACS_GET_TTY_PGRP(fd, pgid) 0
 294 #define EMACS_SET_TTY_PGRP(fd, pgif) 0
 295
 296 #endif
 297
 298 /* EMACS_GETPGRP (arg) returns the process group of the terminal.  */
 299
 300 #if defined (USG) && !defined (GETPGRP_NEEDS_ARG)
 301 #  if !defined (GETPGRP_NO_ARG)
 302 #    define GETPGRP_NO_ARG
 303 #  endif
 304 #endif
 305
 306 #if defined (GETPGRP_NO_ARG)
 307 #  define EMACS_GETPGRP(x) getpgrp()
 308 #else
 309 #  define EMACS_GETPGRP(x) getpgrp(x)
 310 #endif /* !GETPGRP_NO_ARG */
 311 \f
 312 /* Manipulate a TTY's input/output processing parameters.  */
 313
 314 /* struct emacs_tty is a structure used to hold the current tty
 315    parameters.  If the terminal has several structures describing its
 316    state, for example a struct tchars, a struct sgttyb, a struct
 317    tchars, a struct ltchars, and a struct pagechars, struct
 318    emacs_tty should contain an element for each parameter struct
 319    that Emacs may change.
 320
 321    EMACS_GET_TTY (int FD, struct emacs_tty *P) stores the parameters
 322    of the tty on FD in *P.  Return zero if all's well, or -1 if we ran
 323    into an error we couldn't deal with.
 324
 325    EMACS_SET_TTY (int FD, struct emacs_tty *P, int waitp)
 326    sets the parameters of the tty on FD according to the contents of
 327    *P.  If waitp is non-zero, we wait for all queued output to be
 328    written before making the change; otherwise, we forget any queued
 329    input and make the change immediately.
 330    Return 0 if all went well, and -1 if anything failed.
 331
 332    EMACS_TTY_TABS_OK (struct emacs_tty *P) is false iff the kernel
 333    expands tabs to spaces upon output; in that case, there is no
 334    advantage to using tabs over spaces.  */
 335
 336
 337 /* For each tty parameter structure that Emacs might want to save and restore,
 338    - include an element for it in this structure, and
 339    - extend the emacs_{get,set}_tty functions in sysdep.c to deal with the
 340      new members.  */
 341
 342 struct emacs_tty {
 343
 344 /* There is always one of the following elements, so there is no need
 345    for dummy get and set definitions.  */
 346 #ifdef HAVE_TCATTR
 347   struct termios main;
 348 #else
 349 #ifdef HAVE_TERMIO
 350   struct termio main;
 351 #else
 352 #ifdef VMS
 353   struct sensemode main;
 354 #else
 355   struct sgttyb main;
 356 #endif
 357 #endif
 358 #endif
 359
 360 /* If we have TERMIOS, we don't need to do this - they're taken care of
 361    by the tc*attr calls.  */
 362 #ifndef HAVE_TERMIOS
 363 #ifdef HAVE_LTCHARS
 364   struct ltchars ltchars;
 365 #endif
 366
 367 #ifdef HAVE_TCHARS
 368   struct tchars tchars;
 369   int lmode;
 370 #endif
 371 #endif
 372 };
 373 \f
 374 /* Define EMACS_GET_TTY and EMACS_SET_TTY,
 375    the macros for reading and setting parts of `struct emacs_tty'.
 376
 377    These got pretty unmanageable (huge macros are hard to debug), and
 378    finally needed some code which couldn't be done as part of an
 379    expression, so we moved them out to their own functions in sysdep.c.  */
 380 #define EMACS_GET_TTY(fd, p)        (emacs_get_tty ((fd), (p)))
 381 #define EMACS_SET_TTY(fd, p, waitp) (emacs_set_tty ((fd), (p), (waitp)))
 382
 383 \f
 384 /* Define EMACS_TTY_TABS_OK.  */
 385
 386 #ifdef HAVE_TERMIOS
 387
 388 #define EMACS_TTY_TABS_OK(p) (((p)->main.c_oflag & TABDLY) != TAB3)
 389
 390 #else /* not def HAVE_TERMIOS */
 391 #ifdef HAVE_TERMIO
 392
 393 #define EMACS_TTY_TABS_OK(p) (((p)->main.c_oflag & TABDLY) != TAB3)
 394
 395 #else /* neither HAVE_TERMIO nor HAVE_TERMIOS */
 396 #ifdef VMS
 397
 398 #define EMACS_TTY_TABS_OK(p) (((p)->main.tt_char & TT$M_MECHTAB) != 0)
 399
 400 #else
 401
 402 #define EMACS_TTY_TABS_OK(p) (((p)->main.sg_flags & XTABS) != XTABS)
 403
 404 #endif /* not def VMS */
 405 #endif /* not def HAVE_TERMIO */
 406 #endif /* not def HAVE_TERMIOS */