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286 lines
8 KiB
C
286 lines
8 KiB
C
/* systty.h - System-dependent definitions for terminals.
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Copyright (C) 1993, 1994, 2001, 2002, 2003, 2004,
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2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_TERMIOS
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#define HAVE_TCATTR
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#endif
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/* Include the proper files. */
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#ifdef HAVE_TERMIO
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#ifndef NO_TERMIO
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#include <termio.h>
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#endif /* not NO_TERMIO */
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#ifndef INCLUDED_FCNTL
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#define INCLUDED_FCNTL
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#include <fcntl.h>
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#endif
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#else /* not HAVE_TERMIO */
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#ifdef HAVE_TERMIOS
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#ifndef NO_TERMIO
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#include <termio.h>
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#endif
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#include <termios.h>
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#define INCLUDED_FCNTL
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#include <fcntl.h>
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#else /* neither HAVE_TERMIO nor HAVE_TERMIOS */
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#ifndef DOS_NT
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#include <sgtty.h>
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#endif /* not DOS_NT */
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#endif /* not HAVE_TERMIOS */
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#endif /* not HAVE_TERMIO */
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#ifdef __GNU_LIBRARY__
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#include <sys/ioctl.h>
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#include <termios.h>
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#endif
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#ifdef NEED_BSDTTY
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#include <sys/bsdtty.h>
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#endif
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#if defined (HPUX) && defined (HAVE_PTYS)
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#include <sys/ptyio.h>
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#endif
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#ifdef AIX
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#include <sys/pty.h>
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#endif /* AIX */
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#if (defined (POSIX) || defined (NEED_UNISTD_H)) && defined (HAVE_UNISTD_H)
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#include <unistd.h>
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#endif
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/* Special cases - inhibiting the use of certain features. */
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/* Allow m- file to inhibit use of FIONREAD. */
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#ifdef BROKEN_FIONREAD
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#undef FIONREAD
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#undef ASYNC
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#endif
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/* Interrupt input is not used if there is no FIONREAD. */
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#ifndef FIONREAD
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#undef SIGIO
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#endif
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/* On TERMIOS systems, the tcmumbleattr calls take care of these
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parameters, and it's a bad idea to use them (on AIX, it makes the
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tty hang for a long time). */
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#if defined (TIOCGLTC) && !defined (HAVE_TERMIOS)
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#define HAVE_LTCHARS
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#endif
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#if defined (TIOCGETC) && !defined (HAVE_TERMIOS)
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#define HAVE_TCHARS
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#endif
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/* Try to establish the correct character to disable terminal functions
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in a system-independent manner. Note that USG (at least) define
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_POSIX_VDISABLE as 0! */
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#ifdef _POSIX_VDISABLE
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#define CDISABLE _POSIX_VDISABLE
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#else /* not _POSIX_VDISABLE */
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#ifdef CDEL
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#undef CDISABLE
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#define CDISABLE CDEL
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#else /* not CDEL */
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#define CDISABLE 255
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#endif /* not CDEL */
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#endif /* not _POSIX_VDISABLE */
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/* Get the number of characters queued for output. */
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/* EMACS_OUTQSIZE(FD, int *SIZE) stores the number of characters
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queued for output to the terminal FD in *SIZE, if FD is a tty.
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Returns -1 if there was an error (i.e. FD is not a tty), 0
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otherwise. */
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#ifdef TIOCOUTQ
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#define EMACS_OUTQSIZE(fd, size) (ioctl ((fd), TIOCOUTQ, (size)))
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#endif
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#ifdef HAVE_TERMIO
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#ifdef TCOUTQ
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#undef EMACS_OUTQSIZE
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#define EMACS_OUTQSIZE(fd, size) (ioctl ((fd), TCOUTQ, (size)))
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#endif
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#endif
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/* Manipulate a terminal's current process group. */
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/* EMACS_HAVE_TTY_PGRP is true if we can get and set the tty's current
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controlling process group.
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EMACS_GET_TTY_PGRP(int FD, int *PGID) sets *PGID the terminal FD's
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current process group. Return -1 if there is an error.
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EMACS_SET_TTY_PGRP(int FD, int *PGID) sets the terminal FD's
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current process group to *PGID. Return -1 if there is an error. */
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/* HPUX tty process group stuff doesn't work, says the anonymous voice
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from the past. */
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#ifndef HPUX
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#ifdef TIOCGPGRP
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#define EMACS_HAVE_TTY_PGRP
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#else
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#ifdef HAVE_TERMIOS
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#define EMACS_HAVE_TTY_PGRP
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#endif /* HAVE_TERMIOS */
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#endif /* TIOCGPGRP */
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#endif /* not HPUX */
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#ifdef EMACS_HAVE_TTY_PGRP
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#if defined (HAVE_TERMIOS)
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#define EMACS_GET_TTY_PGRP(fd, pgid) (*(pgid) = tcgetpgrp ((fd)))
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#define EMACS_SET_TTY_PGRP(fd, pgid) (tcsetpgrp ((fd), *(pgid)))
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#else /* not HAVE_TERMIOS */
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#ifdef TIOCSPGRP
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#define EMACS_GET_TTY_PGRP(fd, pgid) (ioctl ((fd), TIOCGPGRP, (pgid)))
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#define EMACS_SET_TTY_PGRP(fd, pgid) (ioctl ((fd), TIOCSPGRP, (pgid)))
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#endif /* TIOCSPGRP */
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#endif /* HAVE_TERMIOS */
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#else /* not EMACS_SET_TTY_PGRP */
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/* Just ignore this for now and hope for the best */
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#define EMACS_GET_TTY_PGRP(fd, pgid) 0
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#define EMACS_SET_TTY_PGRP(fd, pgif) 0
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#endif /* not EMACS_SET_TTY_PGRP */
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/* EMACS_GETPGRP (arg) returns the process group of the process. */
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#if defined (GETPGRP_VOID)
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# define EMACS_GETPGRP(x) getpgrp()
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#else /* !GETPGRP_VOID */
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# define EMACS_GETPGRP(x) getpgrp(x)
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#endif /* !GETPGRP_VOID */
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/* Manipulate a TTY's input/output processing parameters. */
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/* struct emacs_tty is a structure used to hold the current tty
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parameters. If the terminal has several structures describing its
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state, for example a struct tchars, a struct sgttyb, a struct
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tchars, a struct ltchars, and a struct pagechars, struct
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emacs_tty should contain an element for each parameter struct
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that Emacs may change.
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EMACS_GET_TTY (int FD, struct emacs_tty *P) stores the parameters
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of the tty on FD in *P. Return zero if all's well, or -1 if we ran
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into an error we couldn't deal with.
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EMACS_SET_TTY (int FD, struct emacs_tty *P, int flushp)
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sets the parameters of the tty on FD according to the contents of
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*P. If flushp is non-zero, we discard queued input to be
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written before making the change.
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Return 0 if all went well, and -1 if anything failed.
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EMACS_TTY_TABS_OK (struct emacs_tty *P) is false if the kernel
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expands tabs to spaces upon output; in that case, there is no
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advantage to using tabs over spaces. */
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/* For each tty parameter structure that Emacs might want to save and restore,
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- include an element for it in this structure, and
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- extend the emacs_{get,set}_tty functions in sysdep.c to deal with the
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new members. */
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struct emacs_tty {
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/* There is always one of the following elements, so there is no need
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for dummy get and set definitions. */
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#ifdef HAVE_TCATTR
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struct termios main;
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#else /* not HAVE_TCATTR */
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#ifdef HAVE_TERMIO
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struct termio main;
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#else /* not HAVE_TERMIO */
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#ifdef DOS_NT
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int main;
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#else /* not DOS_NT */
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struct sgttyb main;
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#endif /* not DOS_NT */
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#endif /* not HAVE_TERMIO */
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#endif /* not HAVE_TCATTR */
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/* If we have TERMIOS, we don't need to do this - they're taken care of
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by the tc*attr calls. */
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#ifndef HAVE_TERMIOS
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#ifdef HAVE_LTCHARS
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struct ltchars ltchars;
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#endif /* HAVE_LTCHARS */
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#ifdef HAVE_TCHARS
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struct tchars tchars;
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int lmode;
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#endif /* HAVE_TCHARS */
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#endif /* not defined HAVE_TERMIOS */
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};
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/* Define EMACS_GET_TTY and EMACS_SET_TTY,
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the macros for reading and setting parts of `struct emacs_tty'.
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These got pretty unmanageable (huge macros are hard to debug), and
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finally needed some code which couldn't be done as part of an
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expression, so we moved them out to their own functions in sysdep.c. */
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#define EMACS_GET_TTY(fd, p) (emacs_get_tty ((fd), (p)))
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#define EMACS_SET_TTY(fd, p, waitp) (emacs_set_tty ((fd), (p), (waitp)))
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#ifdef P_ /* Unfortunately this file is sometimes included before lisp.h */
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extern int emacs_get_tty P_ ((int, struct emacs_tty *));
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extern int emacs_set_tty P_ ((int, struct emacs_tty *, int));
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#endif
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/* Define EMACS_TTY_TABS_OK. */
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#ifdef HAVE_TERMIOS
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#ifdef TABDLY
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#define EMACS_TTY_TABS_OK(p) (((p)->main.c_oflag & TABDLY) != TAB3)
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#else /* not TABDLY */
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#define EMACS_TTY_TABS_OK(p) 1
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#endif /* not TABDLY */
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#else /* not def HAVE_TERMIOS */
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#ifdef HAVE_TERMIO
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#define EMACS_TTY_TABS_OK(p) (((p)->main.c_oflag & TABDLY) != TAB3)
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#else /* neither HAVE_TERMIO nor HAVE_TERMIOS */
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#ifdef DOS_NT
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#define EMACS_TTY_TABS_OK(p) 0
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#else /* not DOS_NT */
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#define EMACS_TTY_TABS_OK(p) (((p)->main.sg_flags & XTABS) != XTABS)
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#endif /* not DOS_NT */
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#endif /* not def HAVE_TERMIO */
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#endif /* not def HAVE_TERMIOS */
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/* arch-tag: cf4b90bc-be41-401c-be98-40619178a712
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(do not change this comment) */
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