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/* rltty.c -- functions to prepare and restore the terminal for readline's
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/* Copyright (C) 1992-2005 Free Software Foundation, Inc.
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This file is part of the GNU Readline Library (Readline), a library
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for reading lines of text with interactive input and history editing.
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Readline 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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Readline 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 Readline. If not, see <http://www.gnu.org/licenses/>.
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#define READLINE_LIBRARY
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#if defined (HAVE_CONFIG_H)
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#include <sys/types.h>
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#if defined (HAVE_UNISTD_H)
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#endif /* HAVE_UNISTD_H */
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#if defined (GWINSZ_IN_SYS_IOCTL)
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# include <sys/ioctl.h>
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#endif /* GWINSZ_IN_SYS_IOCTL */
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#include "rlprivate.h"
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rl_vintfunc_t *rl_prep_term_function = rl_prep_terminal;
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rl_voidfunc_t *rl_deprep_term_function = rl_deprep_terminal;
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static void set_winsize PARAMS((int));
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/* **************************************************************** */
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/* Saving and Restoring the TTY */
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/* **************************************************************** */
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/* Non-zero means that the terminal is in a prepped state. */
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static int terminal_prepped;
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static _RL_TTY_CHARS _rl_tty_chars, _rl_last_tty_chars;
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/* If non-zero, means that this process has called tcflow(fd, TCOOFF)
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and output is suspended. */
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#if defined (__ksr1__)
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/* Dummy call to force a backgrounded readline to stop before it tries
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to get the tty settings. */
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#if defined (TIOCGWINSZ)
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if (ioctl (tty, TIOCGWINSZ, &w) == 0)
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(void) ioctl (tty, TIOCSWINSZ, &w);
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#endif /* TIOCGWINSZ */
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#if defined (NO_TTY_DRIVER)
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#elif defined (NEW_TTY_DRIVER)
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/* Values for the `flags' field of a struct bsdtty. This tells which
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elements of the struct bsdtty have been fetched from the system and
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#define SGTTY_SET 0x01
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#define LFLAG_SET 0x02
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#define TCHARS_SET 0x04
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#define LTCHARS_SET 0x08
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struct sgttyb sgttyb; /* Basic BSD tty driver information. */
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int lflag; /* Local mode flags, like LPASS8. */
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#if defined (TIOCGETC)
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struct tchars tchars; /* Terminal special characters, including ^S and ^Q. */
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#if defined (TIOCGLTC)
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struct ltchars ltchars; /* 4.2 BSD editing characters */
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int flags; /* Bitmap saying which parts of the struct are valid. */
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#define TIOTYPE struct bsdtty
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static void save_tty_chars PARAMS((TIOTYPE *));
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static int _get_tty_settings PARAMS((int, TIOTYPE *));
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static int get_tty_settings PARAMS((int, TIOTYPE *));
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static int _set_tty_settings PARAMS((int, TIOTYPE *));
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static int set_tty_settings PARAMS((int, TIOTYPE *));
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static void prepare_terminal_settings PARAMS((int, TIOTYPE, TIOTYPE *));
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static void set_special_char PARAMS((Keymap, TIOTYPE *, int, rl_command_func_t *));
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save_tty_chars (tiop)
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_rl_last_tty_chars = _rl_tty_chars;
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if (tiop->flags & SGTTY_SET)
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_rl_tty_chars.t_erase = tiop->sgttyb.sg_erase;
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_rl_tty_chars.t_kill = tiop->sgttyb.sg_kill;
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if (tiop->flags & TCHARS_SET)
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_rl_intr_char = _rl_tty_chars.t_intr = tiop->tchars.t_intrc;
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_rl_quit_char = _rl_tty_chars.t_quit = tiop->tchars.t_quitc;
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_rl_tty_chars.t_start = tiop->tchars.t_startc;
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_rl_tty_chars.t_stop = tiop->tchars.t_stopc;
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_rl_tty_chars.t_eof = tiop->tchars.t_eofc;
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_rl_tty_chars.t_eol = '\n';
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_rl_tty_chars.t_eol2 = tiop->tchars.t_brkc;
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if (tiop->flags & LTCHARS_SET)
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_rl_susp_char = _rl_tty_chars.t_susp = tiop->ltchars.t_suspc;
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_rl_tty_chars.t_dsusp = tiop->ltchars.t_dsuspc;
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_rl_tty_chars.t_reprint = tiop->ltchars.t_rprntc;
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_rl_tty_chars.t_flush = tiop->ltchars.t_flushc;
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_rl_tty_chars.t_werase = tiop->ltchars.t_werasc;
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_rl_tty_chars.t_lnext = tiop->ltchars.t_lnextc;
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_rl_tty_chars.t_status = -1;
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get_tty_settings (tty, tiop)
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tiop->flags = tiop->lflag = 0;
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if (ioctl (tty, TIOCGETP, &(tiop->sgttyb)) < 0)
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tiop->flags |= SGTTY_SET;
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#if defined (TIOCLGET)
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if (ioctl (tty, TIOCLGET, &(tiop->lflag)) == 0)
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tiop->flags |= LFLAG_SET;
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#if defined (TIOCGETC)
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if (ioctl (tty, TIOCGETC, &(tiop->tchars)) == 0)
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tiop->flags |= TCHARS_SET;
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#if defined (TIOCGLTC)
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if (ioctl (tty, TIOCGLTC, &(tiop->ltchars)) == 0)
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tiop->flags |= LTCHARS_SET;
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set_tty_settings (tty, tiop)
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if (tiop->flags & SGTTY_SET)
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ioctl (tty, TIOCSETN, &(tiop->sgttyb));
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tiop->flags &= ~SGTTY_SET;
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#if defined (TIOCLSET)
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if (tiop->flags & LFLAG_SET)
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ioctl (tty, TIOCLSET, &(tiop->lflag));
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tiop->flags &= ~LFLAG_SET;
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#if defined (TIOCSETC)
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if (tiop->flags & TCHARS_SET)
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ioctl (tty, TIOCSETC, &(tiop->tchars));
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tiop->flags &= ~TCHARS_SET;
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#if defined (TIOCSLTC)
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if (tiop->flags & LTCHARS_SET)
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ioctl (tty, TIOCSLTC, &(tiop->ltchars));
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tiop->flags &= ~LTCHARS_SET;
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prepare_terminal_settings (meta_flag, oldtio, tiop)
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TIOTYPE oldtio, *tiop;
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_rl_echoing_p = (oldtio.sgttyb.sg_flags & ECHO);
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_rl_echoctl = (oldtio.sgttyb.sg_flags & ECHOCTL);
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/* Copy the original settings to the structure we're going to use for
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tiop->sgttyb = oldtio.sgttyb;
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tiop->lflag = oldtio.lflag;
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#if defined (TIOCGETC)
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tiop->tchars = oldtio.tchars;
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#if defined (TIOCGLTC)
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tiop->ltchars = oldtio.ltchars;
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tiop->flags = oldtio.flags;
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/* First, the basic settings to put us into character-at-a-time, no-echo
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tiop->sgttyb.sg_flags &= ~(ECHO | CRMOD);
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tiop->sgttyb.sg_flags |= CBREAK;
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/* If this terminal doesn't care how the 8th bit is used, then we can
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use it for the meta-key. If only one of even or odd parity is
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specified, then the terminal is using parity, and we cannot. */
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# define ANYP (EVENP | ODDP)
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if (((oldtio.sgttyb.sg_flags & ANYP) == ANYP) ||
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((oldtio.sgttyb.sg_flags & ANYP) == 0))
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tiop->sgttyb.sg_flags |= ANYP;
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/* Hack on local mode flags if we can. */
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#if defined (TIOCLGET)
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# if defined (LPASS8)
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tiop->lflag |= LPASS8;
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#endif /* TIOCLGET */
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#if defined (TIOCGETC)
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# if defined (USE_XON_XOFF)
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/* Get rid of terminal output start and stop characters. */
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tiop->tchars.t_stopc = -1; /* C-s */
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tiop->tchars.t_startc = -1; /* C-q */
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/* If there is an XON character, bind it to restart the output. */
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if (oldtio.tchars.t_startc != -1)
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rl_bind_key (oldtio.tchars.t_startc, rl_restart_output);
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# endif /* USE_XON_XOFF */
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/* If there is an EOF char, bind _rl_eof_char to it. */
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if (oldtio.tchars.t_eofc != -1)
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_rl_eof_char = oldtio.tchars.t_eofc;
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# if defined (NO_KILL_INTR)
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/* Get rid of terminal-generated SIGQUIT and SIGINT. */
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tiop->tchars.t_quitc = -1; /* C-\ */
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tiop->tchars.t_intrc = -1; /* C-c */
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# endif /* NO_KILL_INTR */
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#endif /* TIOCGETC */
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#if defined (TIOCGLTC)
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/* Make the interrupt keys go away. Just enough to make people happy. */
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tiop->ltchars.t_dsuspc = -1; /* C-y */
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tiop->ltchars.t_lnextc = -1; /* C-v */
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#endif /* TIOCGLTC */
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#else /* !defined (NEW_TTY_DRIVER) */
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#if defined (TERMIOS_TTY_DRIVER)
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# define TIOTYPE struct termios
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# define DRAIN_OUTPUT(fd) tcdrain (fd)
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# define GETATTR(tty, tiop) (tcgetattr (tty, tiop))
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# define SETATTR(tty, tiop) (tcsetattr (tty, TCSANOW, tiop))
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# define SETATTR(tty, tiop) (tcsetattr (tty, TCSADRAIN, tiop))
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# endif /* !M_UNIX */
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# define TIOTYPE struct termio
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# define DRAIN_OUTPUT(fd)
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# define GETATTR(tty, tiop) (ioctl (tty, TCGETA, tiop))
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# define SETATTR(tty, tiop) (ioctl (tty, TCSETAW, tiop))
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#endif /* !TERMIOS_TTY_DRIVER */
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static void save_tty_chars PARAMS((TIOTYPE *));
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static int _get_tty_settings PARAMS((int, TIOTYPE *));
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static int get_tty_settings PARAMS((int, TIOTYPE *));
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static int _set_tty_settings PARAMS((int, TIOTYPE *));
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static int set_tty_settings PARAMS((int, TIOTYPE *));
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static void prepare_terminal_settings PARAMS((int, TIOTYPE, TIOTYPE *));
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static void set_special_char PARAMS((Keymap, TIOTYPE *, int, rl_command_func_t *));
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static void _rl_bind_tty_special_chars PARAMS((Keymap, TIOTYPE));
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# define OUTPUT_BEING_FLUSHED(tp) (tp->c_lflag & FLUSHO)
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# define OUTPUT_BEING_FLUSHED(tp) 0
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save_tty_chars (tiop)
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_rl_last_tty_chars = _rl_tty_chars;
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_rl_tty_chars.t_eof = tiop->c_cc[VEOF];
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_rl_tty_chars.t_eol = tiop->c_cc[VEOL];
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_rl_tty_chars.t_eol2 = tiop->c_cc[VEOL2];
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_rl_tty_chars.t_erase = tiop->c_cc[VERASE];
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_rl_tty_chars.t_werase = tiop->c_cc[VWERASE];
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_rl_tty_chars.t_kill = tiop->c_cc[VKILL];
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_rl_tty_chars.t_reprint = tiop->c_cc[VREPRINT];
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_rl_intr_char = _rl_tty_chars.t_intr = tiop->c_cc[VINTR];
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_rl_quit_char = _rl_tty_chars.t_quit = tiop->c_cc[VQUIT];
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_rl_susp_char = _rl_tty_chars.t_susp = tiop->c_cc[VSUSP];
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_rl_tty_chars.t_dsusp = tiop->c_cc[VDSUSP];
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_rl_tty_chars.t_start = tiop->c_cc[VSTART];
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_rl_tty_chars.t_stop = tiop->c_cc[VSTOP];
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_rl_tty_chars.t_lnext = tiop->c_cc[VLNEXT];
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_rl_tty_chars.t_flush = tiop->c_cc[VDISCARD];
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_rl_tty_chars.t_status = tiop->c_cc[VSTATUS];
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#if defined (_AIX) || defined (_AIX41)
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/* Currently this is only used on AIX */
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_rl_errmsg ("warning: %s", msg);
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if ((tp->c_oflag & OPOST) == 0)
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_rl_errmsg ("warning: turning on OPOST for terminal\r");
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tp->c_oflag |= OPOST|ONLCR;
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_get_tty_settings (tty, tiop)
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ioctl_ret = GETATTR (tty, tiop);
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if (OUTPUT_BEING_FLUSHED (tiop))
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_rl_errmsg ("warning: turning off output flushing");
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tiop->c_lflag &= ~FLUSHO;
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get_tty_settings (tty, tiop)
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if (_get_tty_settings (tty, tiop) < 0)
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_set_tty_settings (tty, tiop)
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while (SETATTR (tty, tiop) < 0)
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set_tty_settings (tty, tiop)
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if (_set_tty_settings (tty, tiop) < 0)
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#if defined (TERMIOS_TTY_DRIVER)
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# if defined (__ksr1__)
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tcflow (tty, TCOON); /* Simulate a ^Q. */
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ioctl (tty, TCXONC, 1); /* Simulate a ^Q. */
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#endif /* !TERMIOS_TTY_DRIVER */
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prepare_terminal_settings (meta_flag, oldtio, tiop)
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TIOTYPE oldtio, *tiop;
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_rl_echoing_p = (oldtio.c_lflag & ECHO);
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#if defined (ECHOCTL)
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_rl_echoctl = (oldtio.c_lflag & ECHOCTL);
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tiop->c_lflag &= ~(ICANON | ECHO);
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if ((unsigned char) oldtio.c_cc[VEOF] != (unsigned char) _POSIX_VDISABLE)
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_rl_eof_char = oldtio.c_cc[VEOF];
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#if defined (USE_XON_XOFF)
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tiop->c_iflag &= ~(IXON | IXANY);
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/* `strict' Posix systems do not define IXANY. */
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tiop->c_iflag &= ~IXON;
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#endif /* USE_XON_XOFF */
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/* Only turn this off if we are using all 8 bits. */
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if (((tiop->c_cflag & CSIZE) == CS8) || meta_flag)
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tiop->c_iflag &= ~(ISTRIP | INPCK);
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/* Make sure we differentiate between CR and NL on input. */
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tiop->c_iflag &= ~(ICRNL | INLCR);
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#if !defined (HANDLE_SIGNALS)
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tiop->c_lflag &= ~ISIG;
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tiop->c_lflag |= ISIG;
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tiop->c_cc[VMIN] = 1;
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tiop->c_cc[VTIME] = 0;
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if (OUTPUT_BEING_FLUSHED (tiop))
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tiop->c_lflag &= ~FLUSHO;
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oldtio.c_lflag &= ~FLUSHO;
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/* Turn off characters that we need on Posix systems with job control,
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just to be sure. This includes ^Y and ^V. This should not really
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#if defined (TERMIOS_TTY_DRIVER) && defined (_POSIX_VDISABLE)
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tiop->c_cc[VLNEXT] = _POSIX_VDISABLE;
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tiop->c_cc[VDSUSP] = _POSIX_VDISABLE;
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#endif /* TERMIOS_TTY_DRIVER && _POSIX_VDISABLE */
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#endif /* !NEW_TTY_DRIVER */
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/* Put the terminal in CBREAK mode so that we can detect key presses. */
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#if defined (NO_TTY_DRIVER)
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rl_prep_terminal (meta_flag)
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rl_deprep_terminal ()
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#else /* ! NO_TTY_DRIVER */
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rl_prep_terminal (meta_flag)
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if (terminal_prepped)
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/* Try to keep this function from being INTerrupted. */
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tty = rl_instream ? fileno (rl_instream) : fileno (stdin);
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if (get_tty_settings (tty, &tio) < 0)
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#if defined (ENOTSUP)
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/* MacOS X and Linux, at least, lie about the value of errno if
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if (errno == ENOTTY || errno == EINVAL || errno == ENOTSUP)
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if (errno == ENOTTY || errno == EINVAL)
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_rl_echoing_p = 1; /* XXX */
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_rl_release_sigint ();
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if (_rl_bind_stty_chars)
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#if defined (VI_MODE)
629
/* If editing in vi mode, make sure we restore the bindings in the
630
insertion keymap no matter what keymap we ended up in. */
631
if (rl_editing_mode == vi_mode)
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rl_tty_unset_default_bindings (vi_insertion_keymap);
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rl_tty_unset_default_bindings (_rl_keymap);
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save_tty_chars (&otio);
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RL_SETSTATE(RL_STATE_TTYCSAVED);
639
if (_rl_bind_stty_chars)
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#if defined (VI_MODE)
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/* If editing in vi mode, make sure we set the bindings in the
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insertion keymap no matter what keymap we ended up in. */
644
if (rl_editing_mode == vi_mode)
645
_rl_bind_tty_special_chars (vi_insertion_keymap, tio);
648
_rl_bind_tty_special_chars (_rl_keymap, tio);
651
prepare_terminal_settings (meta_flag, otio, &tio);
653
if (set_tty_settings (tty, &tio) < 0)
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_rl_release_sigint ();
659
if (_rl_enable_keypad)
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_rl_control_keypad (1);
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fflush (rl_outstream);
663
terminal_prepped = 1;
664
RL_SETSTATE(RL_STATE_TERMPREPPED);
666
_rl_release_sigint ();
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/* Restore the terminal's normal settings and modes. */
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rl_deprep_terminal ()
675
if (!terminal_prepped)
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/* Try to keep this function from being interrupted. */
681
tty = rl_instream ? fileno (rl_instream) : fileno (stdin);
683
if (_rl_enable_keypad)
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_rl_control_keypad (0);
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fflush (rl_outstream);
688
if (set_tty_settings (tty, &otio) < 0)
690
_rl_release_sigint ();
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terminal_prepped = 0;
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RL_UNSETSTATE(RL_STATE_TERMPREPPED);
697
_rl_release_sigint ();
699
#endif /* !NO_TTY_DRIVER */
701
/* **************************************************************** */
703
/* Bogus Flow Control */
705
/* **************************************************************** */
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rl_restart_output (count, key)
711
#if defined (__MINGW32__)
713
#else /* !__MING32__ */
715
int fildes = fileno (rl_outstream);
716
#if defined (TIOCSTART)
718
ioctl (&fildes, TIOCSTART, 0);
720
ioctl (fildes, TIOCSTART, 0);
723
#else /* !TIOCSTART */
724
# if defined (TERMIOS_TTY_DRIVER)
725
# if defined (__ksr1__)
729
tcflow (fildes, TCOON);
732
tcflow (fildes, TCOON); /* Simulate a ^Q. */
734
# else /* !TERMIOS_TTY_DRIVER */
735
# if defined (TCXONC)
736
ioctl (fildes, TCXONC, TCOON);
738
# endif /* !TERMIOS_TTY_DRIVER */
739
#endif /* !TIOCSTART */
742
#endif /* !__MINGW32__ */
746
rl_stop_output (count, key)
749
#if defined (__MINGW32__)
753
int fildes = fileno (rl_instream);
755
#if defined (TIOCSTOP)
756
# if defined (apollo)
757
ioctl (&fildes, TIOCSTOP, 0);
759
ioctl (fildes, TIOCSTOP, 0);
761
#else /* !TIOCSTOP */
762
# if defined (TERMIOS_TTY_DRIVER)
763
# if defined (__ksr1__)
766
tcflow (fildes, TCOOFF);
768
# if defined (TCXONC)
769
ioctl (fildes, TCXONC, TCOON);
771
# endif /* !TERMIOS_TTY_DRIVER */
772
#endif /* !TIOCSTOP */
775
#endif /* !__MINGW32__ */
778
/* **************************************************************** */
780
/* Default Key Bindings */
782
/* **************************************************************** */
784
#if !defined (NO_TTY_DRIVER)
785
#define SET_SPECIAL(sc, func) set_special_char(kmap, &ttybuff, sc, func)
788
#if defined (NO_TTY_DRIVER)
790
#define SET_SPECIAL(sc, func)
791
#define RESET_SPECIAL(c)
793
#elif defined (NEW_TTY_DRIVER)
795
set_special_char (kmap, tiop, sc, func)
799
rl_command_func_t *func;
801
if (sc != -1 && kmap[(unsigned char)sc].type == ISFUNC)
802
kmap[(unsigned char)sc].function = func;
805
#define RESET_SPECIAL(c) \
806
if (c != -1 && kmap[(unsigned char)c].type == ISFUNC) \
807
kmap[(unsigned char)c].function = rl_insert;
810
_rl_bind_tty_special_chars (kmap, ttybuff)
814
if (ttybuff.flags & SGTTY_SET)
816
SET_SPECIAL (ttybuff.sgttyb.sg_erase, rl_rubout);
817
SET_SPECIAL (ttybuff.sgttyb.sg_kill, rl_unix_line_discard);
820
# if defined (TIOCGLTC)
821
if (ttybuff.flags & LTCHARS_SET)
823
SET_SPECIAL (ttybuff.ltchars.t_werasc, rl_unix_word_rubout);
824
SET_SPECIAL (ttybuff.ltchars.t_lnextc, rl_quoted_insert);
826
# endif /* TIOCGLTC */
829
#else /* !NEW_TTY_DRIVER */
831
set_special_char (kmap, tiop, sc, func)
835
rl_command_func_t *func;
840
if (uc != (unsigned char)_POSIX_VDISABLE && kmap[uc].type == ISFUNC)
841
kmap[uc].function = func;
845
#define RESET_SPECIAL(uc) \
846
if (uc != (unsigned char)_POSIX_VDISABLE && kmap[uc].type == ISFUNC) \
847
kmap[uc].function = rl_insert;
850
_rl_bind_tty_special_chars (kmap, ttybuff)
854
SET_SPECIAL (VERASE, rl_rubout);
855
SET_SPECIAL (VKILL, rl_unix_line_discard);
857
# if defined (VLNEXT) && defined (TERMIOS_TTY_DRIVER)
858
SET_SPECIAL (VLNEXT, rl_quoted_insert);
859
# endif /* VLNEXT && TERMIOS_TTY_DRIVER */
861
# if defined (VWERASE) && defined (TERMIOS_TTY_DRIVER)
862
SET_SPECIAL (VWERASE, rl_unix_word_rubout);
863
# endif /* VWERASE && TERMIOS_TTY_DRIVER */
866
#endif /* !NEW_TTY_DRIVER */
868
/* Set the system's default editing characters to their readline equivalents
869
in KMAP. Should be static, now that we have rl_tty_set_default_bindings. */
871
rltty_set_default_bindings (kmap)
874
#if !defined (NO_TTY_DRIVER)
878
tty = fileno (rl_instream);
880
if (get_tty_settings (tty, &ttybuff) == 0)
881
_rl_bind_tty_special_chars (kmap, ttybuff);
885
/* New public way to set the system default editing chars to their readline
888
rl_tty_set_default_bindings (kmap)
891
rltty_set_default_bindings (kmap);
894
/* Rebind all of the tty special chars that readline worries about back
895
to self-insert. Call this before saving the current terminal special
896
chars with save_tty_chars(). This only works on POSIX termios or termio
899
rl_tty_unset_default_bindings (kmap)
902
/* Don't bother before we've saved the tty special chars at least once. */
903
if (RL_ISSTATE(RL_STATE_TTYCSAVED) == 0)
906
RESET_SPECIAL (_rl_tty_chars.t_erase);
907
RESET_SPECIAL (_rl_tty_chars.t_kill);
909
# if defined (VLNEXT) && defined (TERMIOS_TTY_DRIVER)
910
RESET_SPECIAL (_rl_tty_chars.t_lnext);
911
# endif /* VLNEXT && TERMIOS_TTY_DRIVER */
913
# if defined (VWERASE) && defined (TERMIOS_TTY_DRIVER)
914
RESET_SPECIAL (_rl_tty_chars.t_werase);
915
# endif /* VWERASE && TERMIOS_TTY_DRIVER */
918
#if defined (HANDLE_SIGNALS)
920
#if defined (NEW_TTY_DRIVER) || defined (NO_TTY_DRIVER)
922
_rl_disable_tty_signals ()
928
_rl_restore_tty_signals ()
934
static TIOTYPE sigstty, nosigstty;
935
static int tty_sigs_disabled = 0;
938
_rl_disable_tty_signals ()
940
if (tty_sigs_disabled)
943
if (_get_tty_settings (fileno (rl_instream), &sigstty) < 0)
948
nosigstty.c_lflag &= ~ISIG;
949
nosigstty.c_iflag &= ~IXON;
951
if (_set_tty_settings (fileno (rl_instream), &nosigstty) < 0)
952
return (_set_tty_settings (fileno (rl_instream), &sigstty));
954
tty_sigs_disabled = 1;
959
_rl_restore_tty_signals ()
963
if (tty_sigs_disabled == 0)
966
r = _set_tty_settings (fileno (rl_instream), &sigstty);
969
tty_sigs_disabled = 0;
973
#endif /* !NEW_TTY_DRIVER */
975
#endif /* HANDLE_SIGNALS */