src/systty.h

   1 /* systty.h - System-dependent definitions for terminals.
   2    Copyright (C) 1993, 1994 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 2, 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, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #ifdef HAVE_TERMIOS
  22 #define HAVE_TCATTR
  23 #endif
  24
  25 /* If we defined these before and we are about to redefine them,
  26    prevent alarming warnings.  */
  27 #ifdef BSD_TERMIOS
  28 #undef NL0
  29 #undef NL1
  30 #undef CR0
  31 #undef CR1
  32 #undef CR2
  33 #undef CR3
  34 #undef TAB0
  35 #undef TAB1
  36 #undef TAB2
  37 #undef XTABS
  38 #undef BS0
  39 #undef BS1
  40 #undef FF0
  41 #undef FF1
  42 #undef ECHO
  43 #undef NOFLSH
  44 #undef TOSTOP
  45 #undef FLUSHO
  46 #undef PENDIN
  47 #endif
  48 \f
  49 /* Include the proper files.  */
  50 #ifdef HAVE_TERMIO
  51 #ifdef __DGUX
  52 #include <sys/ioctl.h>
  53 #endif
  54 #ifndef NO_TERMIO
  55 #include <termio.h>
  56 #endif /* not NO_TERMIO */
  57 #ifndef INCLUDED_FCNTL
  58 #define INCLUDED_FCNTL
  59 #include <fcntl.h>
  60 #endif
  61 #else /* not HAVE_TERMIO */
  62 #ifdef HAVE_TERMIOS
  63 #if defined(_AIX) && defined(_I386)
  64 #include <termios.h>            /* termios.h needs to be before termio.h */
  65 #include <termio.h>
  66 #else /* not (_AIX && _I386) */
  67 #ifndef NO_TERMIO
  68 #include <termio.h>
  69 #endif
  70 #include <termios.h>
  71 #endif /* not (_AIX && _I386) */
  72 #define INCLUDED_FCNTL
  73 #include <fcntl.h>
  74 #else /* neither HAVE_TERMIO nor HAVE_TERMIOS */
  75 #ifndef VMS
  76 #ifndef DOS_NT
  77 #include <sgtty.h>
  78 #endif /* not DOS_NT */
  79 #else /* VMS */
  80 #include <descrip.h>
  81 static struct iosb
  82 {
  83   short status;
  84   short offset;
  85   short termlen;
  86   short term;
  87 } input_iosb;
  88
  89 extern int waiting_for_ast;
  90 extern int stop_input;
  91 extern int input_ef;
  92 extern int timer_ef;
  93 extern int process_ef;
  94 extern int input_eflist;
  95 extern int timer_eflist;
  96
  97 static $DESCRIPTOR (input_dsc, "TT");
  98 static int terminator_mask[2] = { 0, 0 };
  99
 100 static struct sensemode {
 101   short status;
 102   unsigned char xmit_baud;
 103   unsigned char rcv_baud;
 104   unsigned char crfill;
 105   unsigned char lffill;
 106   unsigned char parity;
 107   unsigned char unused;
 108   char class;
 109   char type;
 110   short scr_wid;
 111   unsigned long tt_char : 24, scr_len : 8;
 112   unsigned long tt2_char;
 113 } sensemode_iosb;
 114 #endif /* VMS */
 115 #endif /* not HAVE_TERMIOS */
 116 #endif /* not HAVE_TERMIO */
 117
 118 #ifdef __GNU_LIBRARY__
 119 #include <sys/ioctl.h>
 120 #include <termios.h>
 121 #endif
 122
 123 #ifdef AIXHFT
 124 /* Get files for keyboard remapping */
 125 #define HFNKEYS 2
 126 #include <sys/hft.h>
 127 #include <sys/devinfo.h>
 128 #endif
 129
 130 /* Get rid of LLITOUT in 4.1, since it is said to stimulate kernel bugs.  */
 131 #ifdef BSD4_1
 132 #undef LLITOUT
 133 #define LLITOUT 0
 134 #endif /* 4.1 */
 135
 136 #ifdef NEED_BSDTTY
 137 #include <sys/bsdtty.h>
 138 #endif
 139
 140 #if defined (HPUX) && defined (HAVE_PTYS)
 141 #include <sys/ptyio.h>
 142 #endif
 143
 144 #ifdef AIX
 145 #include <sys/pty.h>
 146 #endif /* AIX */
 147
 148 #if (defined (POSIX) || defined (NEED_UNISTD_H)) && defined (HAVE_UNISTD_H)
 149 #include <unistd.h>
 150 #endif
 151
 152 #ifdef SYSV_PTYS
 153 #include <sys/types.h>
 154 #include <sys/tty.h>
 155 #ifdef titan
 156 #include <sys/ttyhw.h>
 157 #include <sys/stream.h>
 158 #endif
 159 #ifndef NO_PTY_H
 160 #include <sys/pty.h>
 161 #endif
 162 #endif
 163
 164 /* saka@pfu.fujitsu.co.JP writes:
 165    FASYNC defined in this file. But, FASYNC don't working.
 166    so no problem, because unrequest_sigio only need. */
 167 #if defined (pfa)
 168 #include <sys/file.h>
 169 #endif
 170
 171 \f
 172 /* Special cases - inhibiting the use of certain features.  */
 173
 174 #ifdef APOLLO
 175 #undef TIOCSTART
 176 #endif
 177
 178 #ifdef XENIX
 179 #undef TIOCGETC  /* Avoid confusing some conditionals that test this.  */
 180 #endif
 181
 182 #ifdef BROKEN_TIOCGETC
 183 #undef TIOCGETC  /* Avoid confusing some conditionals that test this.  */
 184 #endif
 185
 186 /* UNIPLUS systems may have FIONREAD.  */
 187 #ifdef UNIPLUS
 188 #include <sys.ioctl.h>
 189 #endif
 190
 191 /* Allow m- file to inhibit use of FIONREAD.  */
 192 #ifdef BROKEN_FIONREAD
 193 #undef FIONREAD
 194 #undef ASYNC
 195 #endif
 196
 197 /* Interrupt input is not used if there is no FIONREAD.  */
 198 #ifndef FIONREAD
 199 #undef SIGIO
 200 #endif
 201
 202 /* On TERMIOS systems, the tcmumbleattr calls take care of these
 203    parameters, and it's a bad idea to use them (on AIX, it makes the
 204    tty hang for a long time).  */
 205 #if defined (TIOCGLTC) && !defined (HAVE_TERMIOS)
 206 #define HAVE_LTCHARS
 207 #endif
 208
 209 #if defined (TIOCGETC) && !defined (HAVE_TERMIOS)
 210 #define HAVE_TCHARS
 211 #endif
 212
 213 \f
 214 /* Try to establish the correct character to disable terminal functions
 215    in a system-independent manner.  Note that USG (at least) define
 216    _POSIX_VDISABLE as 0!  */
 217
 218 #ifdef _POSIX_VDISABLE
 219 #define CDISABLE _POSIX_VDISABLE
 220 #else /* not _POSIX_VDISABLE */
 221 #ifdef CDEL
 222 #undef CDISABLE
 223 #define CDISABLE CDEL
 224 #else /* not CDEL */
 225 #define CDISABLE 255
 226 #endif /* not CDEL */
 227 #endif /* not _POSIX_VDISABLE */
 228 \f
 229 /* Get the number of characters queued for output.  */
 230
 231 /* EMACS_OUTQSIZE(FD, int *SIZE) stores the number of characters
 232    queued for output to the terminal FD in *SIZE, if FD is a tty.
 233    Returns -1 if there was an error (i.e. FD is not a tty), 0
 234    otherwise.  */
 235 #ifdef TIOCOUTQ
 236 #define EMACS_OUTQSIZE(fd, size) (ioctl ((fd), TIOCOUTQ, (size)))
 237 #endif
 238
 239 #ifdef HAVE_TERMIO
 240 #ifdef TCOUTQ
 241 #undef EMACS_OUTQSIZE
 242 #define EMACS_OUTQSIZE(fd, size) (ioctl ((fd), TCOUTQ, (size)))
 243 #endif
 244 #endif
 245
 246 \f
 247 /* Manipulate a terminal's current process group.  */
 248
 249 /* EMACS_HAVE_TTY_PGRP is true if we can get and set the tty's current
 250    controlling process group.
 251
 252    EMACS_GET_TTY_PGRP(int FD, int *PGID) sets *PGID the terminal FD's
 253    current process group.  Return -1 if there is an error.
 254
 255    EMACS_SET_TTY_PGRP(int FD, int *PGID) sets the terminal FD's
 256    current process group to *PGID.  Return -1 if there is an error.  */
 257
 258 #ifdef HPUX
 259 /* HPUX tty process group stuff doesn't work, says the anonymous voice
 260    from the past.  */
 261 #else
 262 #ifdef TIOCGPGRP
 263 #define EMACS_HAVE_TTY_PGRP
 264 #else
 265 #ifdef HAVE_TERMIOS
 266 #define EMACS_HAVE_TTY_PGRP
 267 #endif
 268 #endif
 269 #endif
 270
 271 #ifdef EMACS_HAVE_TTY_PGRP
 272
 273 #if defined (HAVE_TERMIOS) && ! defined (BSD_TERMIOS)
 274
 275 #define EMACS_GET_TTY_PGRP(fd, pgid) (*(pgid) = tcgetpgrp ((fd)))
 276 #define EMACS_SET_TTY_PGRP(fd, pgid) (tcsetpgrp ((fd), *(pgid)))
 277
 278 #else
 279 #ifdef TIOCSPGRP
 280
 281 #define EMACS_GET_TTY_PGRP(fd, pgid) (ioctl ((fd), TIOCGPGRP, (pgid)))
 282 #define EMACS_SET_TTY_PGRP(fd, pgid) (ioctl ((fd), TIOCSPGRP, (pgid)))
 283
 284 #endif
 285 #endif
 286
 287 #else
 288
 289 /* Just ignore this for now and hope for the best */
 290 #define EMACS_GET_TTY_PGRP(fd, pgid) 0
 291 #define EMACS_SET_TTY_PGRP(fd, pgif) 0
 292
 293 #endif
 294
 295 /* EMACS_GETPGRP (arg) returns the process group of the process.  */
 296
 297 #ifdef __GNU_LIBRARY__
 298 /* GNU libc by default defines getpgrp with no args on all systems.  */
 299 #if __GLIBC__  >= 2
 300 /* glibc-2.1 adds the BSD compatibility getpgrp function
 301    if you use __BSD_SOURCE, which Emacs does on GNU/Linux systems.  */
 302 #if __GLIBC_MINOR__ < 1 || ! defined (_BSD_SOURCE)
 303 #define GETPGRP_NO_ARG
 304 #endif
 305 #else /* __GLIBC__ < 2 */
 306 #define GETPGRP_NO_ARG
 307 #endif /* __GLIBC__ < 2 */
 308 #else /* not __GNU_LIBRARY__ */
 309 #if defined (USG) && !defined (GETPGRP_NEEDS_ARG)
 310 #  if !defined (GETPGRP_NO_ARG)
 311 #    define GETPGRP_NO_ARG
 312 #  endif
 313 #endif
 314 #endif /* not __GNU_LIBRARY__ */
 315
 316 #if defined (GETPGRP_NO_ARG)
 317 #  define EMACS_GETPGRP(x) getpgrp()
 318 #else
 319 #  define EMACS_GETPGRP(x) getpgrp(x)
 320 #endif /* !GETPGRP_NO_ARG */
 321 \f
 322 /* Manipulate a TTY's input/output processing parameters.  */
 323
 324 /* struct emacs_tty is a structure used to hold the current tty
 325    parameters.  If the terminal has several structures describing its
 326    state, for example a struct tchars, a struct sgttyb, a struct
 327    tchars, a struct ltchars, and a struct pagechars, struct
 328    emacs_tty should contain an element for each parameter struct
 329    that Emacs may change.
 330
 331    EMACS_GET_TTY (int FD, struct emacs_tty *P) stores the parameters
 332    of the tty on FD in *P.  Return zero if all's well, or -1 if we ran
 333    into an error we couldn't deal with.
 334
 335    EMACS_SET_TTY (int FD, struct emacs_tty *P, int flushp)
 336    sets the parameters of the tty on FD according to the contents of
 337    *P.  If flushp is non-zero, we discard queued input to be
 338    written before making the change.
 339    Return 0 if all went well, and -1 if anything failed.
 340
 341    EMACS_TTY_TABS_OK (struct emacs_tty *P) is false iff the kernel
 342    expands tabs to spaces upon output; in that case, there is no
 343    advantage to using tabs over spaces.  */
 344
 345
 346 /* For each tty parameter structure that Emacs might want to save and restore,
 347    - include an element for it in this structure, and
 348    - extend the emacs_{get,set}_tty functions in sysdep.c to deal with the
 349      new members.  */
 350
 351 struct emacs_tty {
 352
 353 /* There is always one of the following elements, so there is no need
 354    for dummy get and set definitions.  */
 355 #ifdef HAVE_TCATTR
 356   struct termios main;
 357 #else
 358 #ifdef HAVE_TERMIO
 359   struct termio main;
 360 #else
 361 #ifdef VMS
 362   struct sensemode main;
 363 #else
 364 #ifdef DOS_NT
 365   int main;
 366 #else  /* not DOS_NT */
 367   struct sgttyb main;
 368 #endif /* not DOS_NT */
 369 #endif
 370 #endif
 371 #endif
 372
 373 /* If we have TERMIOS, we don't need to do this - they're taken care of
 374    by the tc*attr calls.  */
 375 #ifndef HAVE_TERMIOS
 376 #ifdef HAVE_LTCHARS
 377   struct ltchars ltchars;
 378 #endif
 379
 380 #ifdef HAVE_TCHARS
 381   struct tchars tchars;
 382   int lmode;
 383 #endif
 384 #endif
 385 };
 386 \f
 387 /* Define EMACS_GET_TTY and EMACS_SET_TTY,
 388    the macros for reading and setting parts of `struct emacs_tty'.
 389
 390    These got pretty unmanageable (huge macros are hard to debug), and
 391    finally needed some code which couldn't be done as part of an
 392    expression, so we moved them out to their own functions in sysdep.c.  */
 393 #define EMACS_GET_TTY(fd, p)        (emacs_get_tty ((fd), (p)))
 394 #define EMACS_SET_TTY(fd, p, waitp) (emacs_set_tty ((fd), (p), (waitp)))
 395 #ifdef P_  /* Unfortunately this file is sometimes included before lisp.h */
 396 extern int emacs_get_tty P_ ((int, struct emacs_tty *));
 397 extern int emacs_set_tty P_ ((int, struct emacs_tty *, int));
 398 #endif
 399
 400 \f
 401 /* Define EMACS_TTY_TABS_OK.  */
 402
 403 #ifdef HAVE_TERMIOS
 404
 405 #ifdef TABDLY
 406 #define EMACS_TTY_TABS_OK(p) (((p)->main.c_oflag & TABDLY) != TAB3)
 407 #else
 408 #define EMACS_TTY_TABS_OK(p) 1
 409 #endif
 410
 411 #else /* not def HAVE_TERMIOS */
 412 #ifdef HAVE_TERMIO
 413
 414 #define EMACS_TTY_TABS_OK(p) (((p)->main.c_oflag & TABDLY) != TAB3)
 415
 416 #else /* neither HAVE_TERMIO nor HAVE_TERMIOS */
 417 #ifdef VMS
 418
 419 #define EMACS_TTY_TABS_OK(p) (((p)->main.tt_char & TT$M_MECHTAB) != 0)
 420
 421 #else
 422
 423 #ifdef DOS_NT
 424 #define EMACS_TTY_TABS_OK(p) 0
 425 #else /* not DOS_NT */
 426 #define EMACS_TTY_TABS_OK(p) (((p)->main.sg_flags & XTABS) != XTABS)
 427 #endif /* not DOS_NT */
 428
 429 #endif /* not def VMS */
 430 #endif /* not def HAVE_TERMIO */
 431 #endif /* not def HAVE_TERMIOS */