src/systty.h

   1 /* systty.h - System-dependent definitions for terminals.
   2    Copyright (C) 1993-1994, 2001-2013 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
  21 #ifndef DOS_NT
  22 #include <termios.h>
  23 #include <fcntl.h>
  24 #endif /* not DOS_NT */
  25
  26 #include <sys/ioctl.h>
  27
  28 #ifdef HPUX
  29 #include <sys/bsdtty.h>
  30 #include <sys/ptyio.h>
  31 #endif
  32
  33 #ifdef AIX
  34 #include <sys/pty.h>
  35 #endif /* AIX */
  36
  37 #include <unistd.h>
  38
  39 \f
  40 /* Try to establish the correct character to disable terminal functions
  41    in a system-independent manner.  Note that USG (at least) define
  42    _POSIX_VDISABLE as 0!  */
  43
  44 #ifdef _POSIX_VDISABLE
  45 #define CDISABLE _POSIX_VDISABLE
  46 #else /* not _POSIX_VDISABLE */
  47 #ifdef CDEL
  48 #undef CDISABLE
  49 #define CDISABLE CDEL
  50 #else /* not CDEL */
  51 #define CDISABLE 255
  52 #endif /* not CDEL */
  53 #endif /* not _POSIX_VDISABLE */
  54 \f
  55 /* Get the number of characters queued for output.  */
  56
  57 /* EMACS_OUTQSIZE(FD, int *SIZE) stores the number of characters
  58    queued for output to the terminal FD in *SIZE, if FD is a tty.
  59    Returns -1 if there was an error (i.e. FD is not a tty), 0
  60    otherwise.  */
  61 #ifdef TIOCOUTQ
  62 #define EMACS_OUTQSIZE(fd, size) (ioctl ((fd), TIOCOUTQ, (size)))
  63 #endif
  64
  65 \f
  66 /* Manipulate a terminal's current process group.  */
  67
  68 /* EMACS_GETPGRP (arg) returns the process group of the process.  */
  69
  70 #if defined (GETPGRP_VOID)
  71 #  define EMACS_GETPGRP(x) getpgrp()
  72 #else /* !GETPGRP_VOID */
  73 #  define EMACS_GETPGRP(x) getpgrp(x)
  74 #endif /* !GETPGRP_VOID */
  75 \f
  76 /* Manipulate a TTY's input/output processing parameters.  */
  77
  78 /* struct emacs_tty is a structure used to hold the current tty
  79    parameters.  If the terminal has several structures describing its
  80    state, for example a struct tchars, a struct sgttyb, a struct
  81    tchars, a struct ltchars, and a struct pagechars, struct
  82    emacs_tty should contain an element for each parameter struct
  83    that Emacs may change.  */
  84
  85
  86 /* For each tty parameter structure that Emacs might want to save and restore,
  87    - include an element for it in this structure, and
  88    - extend the emacs_{get,set}_tty functions in sysdep.c to deal with the
  89      new members.  */
  90
  91 struct emacs_tty {
  92
  93 /* There is always one of the following elements, so there is no need
  94    for dummy get and set definitions.  */
  95 #ifndef DOS_NT
  96   struct termios main;
  97 #else /* DOS_NT */
  98   int main;
  99 #endif /* DOS_NT */
 100 };
 101 \f
 102 /* From sysdep.c or w32.c  */
 103 extern int serial_open (char *);
 104 extern void serial_configure (struct Lisp_Process *, Lisp_Object);