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/* rltty.c -- functions to prepare and restore the terminal for readline's
use. */
/* Copyright (C) 1992 Free Software Foundation, Inc.
This file is part of the GNU Readline Library, a library for
reading lines of text with interactive input and history editing.
The GNU Readline Library is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 1, or
(at your option) any later version.
The GNU Readline Library is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
The GNU General Public License is often shipped with GNU software, and
is generally kept in a file called COPYING or LICENSE. If you do not
have a copy of the license, write to the Free Software Foundation,
675 Mass Ave, Cambridge, MA 02139, USA. */
#include "sysdep.h"
#include <signal.h>
#include <errno.h>
#include <stdio.h>
#ifndef NO_SYS_FILE
#include <sys/file.h>
#endif
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include "rldefs.h"
#include "readline.h"
#if !defined (errno)
extern int errno;
#endif /* !errno */
extern int readline_echoing_p;
extern int _rl_eof_char;
#if defined (__GO32__)
# include <sys/pc.h>
# undef HANDLE_SIGNALS
#endif /* __GO32__ */
/* **************************************************************** */
/* */
/* Signal Management */
/* */
/* **************************************************************** */
#if defined (HAVE_POSIX_SIGNALS)
static sigset_t sigint_set, sigint_oset;
#else /* !HAVE_POSIX_SIGNALS */
# if defined (HAVE_BSD_SIGNALS)
static int sigint_oldmask;
# endif /* HAVE_BSD_SIGNALS */
#endif /* !HAVE_POSIX_SIGNALS */
static int sigint_blocked = 0;
/* Cause SIGINT to not be delivered until the corresponding call to
release_sigint(). */
static void
block_sigint ()
{
if (sigint_blocked)
return;
#if defined (HAVE_POSIX_SIGNALS)
sigemptyset (&sigint_set);
sigemptyset (&sigint_oset);
sigaddset (&sigint_set, SIGINT);
sigprocmask (SIG_BLOCK, &sigint_set, &sigint_oset);
#else /* !HAVE_POSIX_SIGNALS */
# if defined (HAVE_BSD_SIGNALS)
sigint_oldmask = sigblock (sigmask (SIGINT));
# else /* !HAVE_BSD_SIGNALS */
# if defined (HAVE_USG_SIGHOLD)
sighold (SIGINT);
# endif /* HAVE_USG_SIGHOLD */
# endif /* !HAVE_BSD_SIGNALS */
#endif /* !HAVE_POSIX_SIGNALS */
sigint_blocked = 1;
}
/* Allow SIGINT to be delivered. */
static void
release_sigint ()
{
if (!sigint_blocked)
return;
#if defined (HAVE_POSIX_SIGNALS)
sigprocmask (SIG_SETMASK, &sigint_oset, (sigset_t *)NULL);
#else
# if defined (HAVE_BSD_SIGNALS)
sigsetmask (sigint_oldmask);
# else /* !HAVE_BSD_SIGNALS */
# if defined (HAVE_USG_SIGHOLD)
sigrelse (SIGINT);
# endif /* HAVE_USG_SIGHOLD */
# endif /* !HAVE_BSD_SIGNALS */
#endif /* !HAVE_POSIX_SIGNALS */
sigint_blocked = 0;
}
/* **************************************************************** */
/* */
/* Controlling the Meta Key */
/* */
/* **************************************************************** */
extern int term_has_meta;
extern char *term_mm;
extern char *term_mo;
static void
outchar (c)
int c;
{
putc (c, rl_outstream);
}
/* Turn on/off the meta key depending on ON. */
#if !defined (MINIMAL)
static void
control_meta_key (on)
int on;
{
if (term_has_meta)
{
if (on && term_mm)
tputs (term_mm, 1, outchar);
else if (!on && term_mo)
tputs (term_mo, 1, outchar);
}
}
#endif /* !MINIMAL */
/* **************************************************************** */
/* */
/* Saving and Restoring the TTY */
/* */
/* **************************************************************** */
/* Non-zero means that the terminal is in a prepped state. */
static int terminal_prepped = 0;
/* If non-zero, means that this process has called tcflow(fd, TCOOFF)
and output is suspended. */
#if defined (__ksr1__)
static int ksrflow = 0;
#endif
#if defined (NEW_TTY_DRIVER)
/* Values for the `flags' field of a struct bsdtty. This tells which
elements of the struct bsdtty have been fetched from the system and
are valid. */
#define SGTTY_SET 0x01
#define LFLAG_SET 0x02
#define TCHARS_SET 0x04
#define LTCHARS_SET 0x08
struct bsdtty {
struct sgttyb sgttyb; /* Basic BSD tty driver information. */
int lflag; /* Local mode flags, like LPASS8. */
#if defined (TIOCGETC)
struct tchars tchars; /* Terminal special characters, including ^S and ^Q. */
#endif
#if defined (TIOCGLTC)
struct ltchars ltchars; /* 4.2 BSD editing characters */
#endif
int flags; /* Bitmap saying which parts of the struct are valid. */
};
#define TIOTYPE struct bsdtty
static TIOTYPE otio;
static int
get_tty_settings (tty, tiop)
int tty;
TIOTYPE *tiop;
{
tiop->flags = tiop->lflag = 0;
ioctl (tty, TIOCGETP, &(tiop->sgttyb));
tiop->flags |= SGTTY_SET;
#if defined (TIOCLGET)
ioctl (tty, TIOCLGET, &(tiop->lflag));
tiop->flags |= LFLAG_SET;
#endif
#if defined (TIOCGETC)
ioctl (tty, TIOCGETC, &(tiop->tchars));
tiop->flags |= TCHARS_SET;
#endif
#if defined (TIOCGLTC)
ioctl (tty, TIOCGLTC, &(tiop->ltchars));
tiop->flags |= LTCHARS_SET;
#endif
return 0;
}
set_tty_settings (tty, tiop)
int tty;
TIOTYPE *tiop;
{
if (tiop->flags & SGTTY_SET)
{
ioctl (tty, TIOCSETN, &(tiop->sgttyb));
tiop->flags &= ~SGTTY_SET;
}
#if defined (TIOCLSET)
if (tiop->flags & LFLAG_SET)
{
ioctl (tty, TIOCLSET, &(tiop->lflag));
tiop->flags &= ~LFLAG_SET;
}
#endif
#if defined (TIOCSETC)
if (tiop->flags & TCHARS_SET)
{
ioctl (tty, TIOCSETC, &(tiop->tchars));
tiop->flags &= ~TCHARS_SET;
}
#endif
#if defined (TIOCSLTC)
if (tiop->flags & LTCHARS_SET)
{
ioctl (tty, TIOCSLTC, &(tiop->ltchars));
tiop->flags &= ~LTCHARS_SET;
}
#endif
return 0;
}
static void
prepare_terminal_settings (meta_flag, otio, tiop)
int meta_flag;
TIOTYPE otio, *tiop;
{
#if !defined (MINIMAL)
readline_echoing_p = (otio.sgttyb.sg_flags & ECHO);
/* Copy the original settings to the structure we're going to use for
our settings. */
tiop->sgttyb = otio.sgttyb;
tiop->lflag = otio.lflag;
#if defined (TIOCGETC)
tiop->tchars = otio.tchars;
#endif
#if defined (TIOCGLTC)
tiop->ltchars = otio.ltchars;
#endif
tiop->flags = otio.flags;
/* First, the basic settings to put us into character-at-a-time, no-echo
input mode. */
tiop->sgttyb.sg_flags &= ~(ECHO | CRMOD);
tiop->sgttyb.sg_flags |= CBREAK;
/* If this terminal doesn't care how the 8th bit is used, then we can
use it for the meta-key. If only one of even or odd parity is
specified, then the terminal is using parity, and we cannot. */
#if !defined (ANYP)
# define ANYP (EVENP | ODDP)
#endif
if (((otio.sgttyb.sg_flags & ANYP) == ANYP) ||
((otio.sgttyb.sg_flags & ANYP) == 0))
{
tiop->sgttyb.sg_flags |= ANYP;
/* Hack on local mode flags if we can. */
#if defined (TIOCLGET)
# if defined (LPASS8)
tiop->lflag |= LPASS8;
# endif /* LPASS8 */
#endif /* TIOCLGET */
}
#if defined (TIOCGETC)
# if defined (USE_XON_XOFF)
/* Get rid of terminal output start and stop characters. */
tiop->tchars.t_stopc = -1; /* C-s */
tiop->tchars.t_startc = -1; /* C-q */
/* If there is an XON character, bind it to restart the output. */
if (otio.tchars.t_startc != -1)
rl_bind_key (otio.tchars.t_startc, rl_restart_output);
# endif /* USE_XON_XOFF */
/* If there is an EOF char, bind _rl_eof_char to it. */
if (otio.tchars.t_eofc != -1)
_rl_eof_char = otio.tchars.t_eofc;
# if defined (NO_KILL_INTR)
/* Get rid of terminal-generated SIGQUIT and SIGINT. */
tiop->tchars.t_quitc = -1; /* C-\ */
tiop->tchars.t_intrc = -1; /* C-c */
# endif /* NO_KILL_INTR */
#endif /* TIOCGETC */
#if defined (TIOCGLTC)
/* Make the interrupt keys go away. Just enough to make people happy. */
tiop->ltchars.t_dsuspc = -1; /* C-y */
tiop->ltchars.t_lnextc = -1; /* C-v */
#endif /* TIOCGLTC */
#endif /* !MINIMAL */
}
#endif /* defined (NEW_TTY_DRIVER) */
#if !defined (NEW_TTY_DRIVER) && !defined(MINIMAL)
#if !defined (VMIN)
# define VMIN VEOF
#endif
#if !defined (VTIME)
# define VTIME VEOL
#endif
#if defined (TERMIOS_TTY_DRIVER)
# define TIOTYPE struct termios
# define DRAIN_OUTPUT(fd) tcdrain (fd)
# define GETATTR(tty, tiop) (tcgetattr (tty, tiop))
# define SETATTR(tty, tiop) (tcsetattr (tty, TCSANOW, tiop))
#else
# define TIOTYPE struct termio
# define DRAIN_OUTPUT(fd)
# define GETATTR(tty, tiop) (ioctl (tty, TCGETA, tiop))
# define SETATTR(tty, tiop) (ioctl (tty, TCSETA, tiop))
#endif /* !TERMIOS_TTY_DRIVER */
static TIOTYPE otio;
static int
get_tty_settings (tty, tiop)
int tty;
TIOTYPE *tiop;
{
while (GETATTR (tty, tiop) < 0)
{
if (errno != EINTR)
return -1;
errno = 0;
}
return 0;
}
static int
set_tty_settings (tty, tiop)
int tty;
TIOTYPE *tiop;
{
while (SETATTR (tty, tiop) < 0)
{
if (errno != EINTR)
return -1;
errno = 0;
}
#if 0
#if defined (TERMIOS_TTY_DRIVER)
# if defined (__ksr1__)
if (ksrflow)
{
ksrflow = 0;
tcflow (tty, TCOON);
}
# else /* !ksr1 */
tcflow (tty, TCOON); /* Simulate a ^Q. */
# endif /* !ksr1 */
#else
ioctl (tty, TCXONC, 1); /* Simulate a ^Q. */
#endif /* !TERMIOS_TTY_DRIVER */
#endif
return 0;
}
static void
prepare_terminal_settings (meta_flag, otio, tiop)
int meta_flag;
TIOTYPE otio, *tiop;
{
readline_echoing_p = (otio.c_lflag & ECHO);
tiop->c_lflag &= ~(ICANON | ECHO);
if ((unsigned char) otio.c_cc[VEOF] != (unsigned char) _POSIX_VDISABLE)
_rl_eof_char = otio.c_cc[VEOF];
#if defined (USE_XON_XOFF)
#if defined (IXANY)
tiop->c_iflag &= ~(IXON | IXOFF | IXANY);
#else
/* `strict' Posix systems do not define IXANY. */
tiop->c_iflag &= ~(IXON | IXOFF);
#endif /* IXANY */
#endif /* USE_XON_XOFF */
/* Only turn this off if we are using all 8 bits. */
if (((tiop->c_cflag & CSIZE) == CS8) || meta_flag)
tiop->c_iflag &= ~(ISTRIP | INPCK);
/* Make sure we differentiate between CR and NL on input. */
tiop->c_iflag &= ~(ICRNL | INLCR);
#if !defined (HANDLE_SIGNALS)
tiop->c_lflag &= ~ISIG;
#else
tiop->c_lflag |= ISIG;
#endif
tiop->c_cc[VMIN] = 1;
tiop->c_cc[VTIME] = 0;
/* Turn off characters that we need on Posix systems with job control,
just to be sure. This includes ^Y and ^V. This should not really
be necessary. */
#if defined (TERMIOS_TTY_DRIVER) && defined (_POSIX_VDISABLE)
#if defined (VLNEXT)
tiop->c_cc[VLNEXT] = _POSIX_VDISABLE;
#endif
#if defined (VDSUSP)
tiop->c_cc[VDSUSP] = _POSIX_VDISABLE;
#endif
#endif /* TERMIOS_TTY_DRIVER && _POSIX_VDISABLE */
}
#endif /* !defined (NEW_TTY_DRIVER) && !defined(MINIMAL) */
/* Put the terminal in CBREAK mode so that we can detect key presses. */
void
rl_prep_terminal (meta_flag)
int meta_flag;
{
#if !defined (MINIMAL)
int tty = fileno (rl_instream);
TIOTYPE tio;
if (terminal_prepped)
return;
/* Try to keep this function from being INTerrupted. */
block_sigint ();
if (get_tty_settings (tty, &tio) < 0)
{
release_sigint ();
return;
}
otio = tio;
prepare_terminal_settings (meta_flag, otio, &tio);
if (set_tty_settings (tty, &tio) < 0)
{
release_sigint ();
return;
}
control_meta_key (1);
terminal_prepped = 1;
release_sigint ();
#endif /* !MINIMAK */
}
/* Restore the terminal's normal settings and modes. */
void
rl_deprep_terminal ()
{
#if !defined (MINIMAL)
int tty = fileno (rl_instream);
if (!terminal_prepped)
return;
/* Try to keep this function from being INTerrupted. */
block_sigint ();
if (set_tty_settings (tty, &otio) < 0)
{
release_sigint ();
return;
}
#ifdef NEW_TTY_DRIVER
readline_echoing_p = 1;
#endif
control_meta_key (0);
terminal_prepped = 0;
release_sigint ();
#endif /* !MINIMAL */
}
/* **************************************************************** */
/* */
/* Bogus Flow Control */
/* */
/* **************************************************************** */
rl_restart_output (count, key)
int count, key;
{
int fildes = fileno (rl_outstream);
#if defined (TIOCSTART)
#if defined (apollo)
ioctl (&fildes, TIOCSTART, 0);
#else
ioctl (fildes, TIOCSTART, 0);
#endif /* apollo */
#else /* !TIOCSTART */
# if defined (TERMIOS_TTY_DRIVER)
# if defined (__ksr1__)
if (ksrflow)
{
ksrflow = 0;
tcflow (fildes, TCOON);
}
# else /* !ksr1 */
tcflow (fildes, TCOON); /* Simulate a ^Q. */
# endif /* !ksr1 */
# else /* !TERMIOS_TTY_DRIVER */
# if defined (TCXONC)
ioctl (fildes, TCXONC, TCOON);
# endif /* TCXONC */
# endif /* !TERMIOS_TTY_DRIVER */
#endif /* !TIOCSTART */
}
rl_stop_output (count, key)
int count, key;
{
int fildes = fileno (rl_instream);
#if defined (TIOCSTOP)
# if defined (apollo)
ioctl (&fildes, TIOCSTOP, 0);
# else
ioctl (fildes, TIOCSTOP, 0);
# endif /* apollo */
#else /* !TIOCSTOP */
# if defined (TERMIOS_TTY_DRIVER)
# if defined (__ksr1__)
ksrflow = 1;
# endif /* ksr1 */
tcflow (fildes, TCOOFF);
# else
# if defined (TCXONC)
ioctl (fildes, TCXONC, TCOON);
# endif /* TCXONC */
# endif /* !TERMIOS_TTY_DRIVER */
#endif /* !TIOCSTOP */
}
/* **************************************************************** */
/* */
/* Default Key Bindings */
/* */
/* **************************************************************** */
#if !defined (MINIMAL)
void
rltty_set_default_bindings (kmap)
Keymap kmap;
{
TIOTYPE ttybuff;
int tty = fileno (rl_instream);
#if defined (NEW_TTY_DRIVER)
if (get_tty_settings (tty, &ttybuff) == 0)
{
if (ttybuff.flags & SGTTY_SET)
{
int erase, kill;
erase = ttybuff.sgttyb.sg_erase;
kill = ttybuff.sgttyb.sg_kill;
if (erase != -1 && kmap[erase].type == ISFUNC)
kmap[erase].function = rl_rubout;
if (kill != -1 && kmap[kill].type == ISFUNC)
kmap[kill].function = rl_unix_line_discard;
}
# if defined (TIOCGLTC)
if (ttybuff.flags & LTCHARS_SET)
{
int werase, nextc;
werase = ttybuff.ltchars.t_werasc;
nextc = ttybuff.ltchars.t_lnextc;
if (werase != -1 && kmap[werase].type == ISFUNC)
kmap[werase].function = rl_unix_word_rubout;
if (nextc != -1 && kmap[nextc].type == ISFUNC)
kmap[nextc].function = rl_quoted_insert;
}
}
# endif /* TIOCGLTC */
#else /* !NEW_TTY_DRIVER */
if (get_tty_settings (tty, &ttybuff) == 0)
{
unsigned char erase, kill;
erase = ttybuff.c_cc[VERASE];
kill = ttybuff.c_cc[VKILL];
if (erase != (unsigned char)_POSIX_VDISABLE &&
kmap[erase].type == ISFUNC)
kmap[erase].function = rl_rubout;
if (kill != (unsigned char)_POSIX_VDISABLE &&
kmap[kill].type == ISFUNC)
kmap[kill].function = rl_unix_line_discard;
# if defined (VLNEXT) && defined (TERMIOS_TTY_DRIVER)
{
unsigned char nextc;
nextc = ttybuff.c_cc[VLNEXT];
if (nextc != (unsigned char)_POSIX_VDISABLE &&
kmap[nextc].type == ISFUNC)
kmap[nextc].function = rl_quoted_insert;
}
# endif /* VLNEXT && TERMIOS_TTY_DRIVER */
# if defined (VWERASE) && defined (TERMIOS_TTY_DRIVER)
{
unsigned char werase;
werase = ttybuff.c_cc[VWERASE];
if (werase != (unsigned char)_POSIX_VDISABLE &&
kmap[werase].type == ISFUNC)
kmap[werase].function = rl_unix_word_rubout;
}
# endif /* VWERASE && TERMIOS_TTY_DRIVER */
}
#endif /* !NEW_TTY_DRIVER */
}
#endif /* !MINIMAL */
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.