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