src/systty.h

   1 /* systty.h - System-dependent definitions for terminals.
   2    Copyright (C) 1993-1994, 2001-2011  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 3 of the License, or
   9 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 /* Include the proper files.  */
  20 #ifndef DOS_NT
  21 #ifndef NO_TERMIO
  22 #include <termio.h>
  23 #endif /* not NO_TERMIO */
  24 #include <termios.h>
  25 #include <fcntl.h>
  26 #endif /* not DOS_NT */
  27
  28 #include <sys/ioctl.h>
  29
  30 #ifdef HPUX
  31 #include <sys/bsdtty.h>
  32 #include <sys/ptyio.h>
  33 #endif
  34
  35 #ifdef AIX
  36 #include <sys/pty.h>
  37 #endif /* AIX */
  38
  39 #include <unistd.h>
  40
  41 \f
  42 /* Special cases - inhibiting the use of certain features.  */
  43
  44 /* Allow m- file to inhibit use of FIONREAD.  */
  45 #ifdef BROKEN_FIONREAD
  46 #undef FIONREAD
  47 #undef ASYNC
  48 #endif
  49
  50 /* Interrupt input is not used if there is no FIONREAD.  */
  51 #ifndef FIONREAD
  52 #undef SIGIO
  53 #endif
  54
  55 \f
  56 /* Try to establish the correct character to disable terminal functions
  57    in a system-independent manner.  Note that USG (at least) define
  58    _POSIX_VDISABLE as 0!  */
  59
  60 #ifdef _POSIX_VDISABLE
  61 #define CDISABLE _POSIX_VDISABLE
  62 #else /* not _POSIX_VDISABLE */
  63 #ifdef CDEL
  64 #undef CDISABLE
  65 #define CDISABLE CDEL
  66 #else /* not CDEL */
  67 #define CDISABLE 255
  68 #endif /* not CDEL */
  69 #endif /* not _POSIX_VDISABLE */
  70 \f
  71 /* Get the number of characters queued for output.  */
  72
  73 /* EMACS_OUTQSIZE(FD, int *SIZE) stores the number of characters
  74    queued for output to the terminal FD in *SIZE, if FD is a tty.
  75    Returns -1 if there was an error (i.e. FD is not a tty), 0
  76    otherwise.  */
  77 #ifdef TIOCOUTQ
  78 #define EMACS_OUTQSIZE(fd, size) (ioctl ((fd), TIOCOUTQ, (size)))
  79 #endif
  80
  81 \f
  82 /* Manipulate a terminal's current process group.  */
  83
  84 /* EMACS_GETPGRP (arg) returns the process group of the process.  */
  85
  86 #if defined (GETPGRP_VOID)
  87 #  define EMACS_GETPGRP(x) getpgrp()
  88 #else /* !GETPGRP_VOID */
  89 #  define EMACS_GETPGRP(x) getpgrp(x)
  90 #endif /* !GETPGRP_VOID */
  91 \f
  92 /* Manipulate a TTY's input/output processing parameters.  */
  93
  94 /* struct emacs_tty is a structure used to hold the current tty
  95    parameters.  If the terminal has several structures describing its
  96    state, for example a struct tchars, a struct sgttyb, a struct
  97    tchars, a struct ltchars, and a struct pagechars, struct
  98    emacs_tty should contain an element for each parameter struct
  99    that Emacs may change.  */
 100
 101
 102 /* For each tty parameter structure that Emacs might want to save and restore,
 103    - include an element for it in this structure, and
 104    - extend the emacs_{get,set}_tty functions in sysdep.c to deal with the
 105      new members.  */
 106
 107 struct emacs_tty {
 108
 109 /* There is always one of the following elements, so there is no need
 110    for dummy get and set definitions.  */
 111 #ifndef DOS_NT
 112   struct termios main;
 113 #else /* DOS_NT */
 114   int main;
 115 #endif /* DOS_NT */
 116 };
 117 \f
 118 /* From sysdep.c or w32.c  */
 119 extern int serial_open (char *);
 120 extern void serial_configure (struct Lisp_Process *, Lisp_Object);