[deliverable/binutils-gdb.git] / readline / rltty.c

/* 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 <sys/types.h>
#include <signal.h>
#include <errno.h>
#include <stdio.h>

#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;
}
\f
/* **************************************************************** */
/*								    */
/*		      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. */
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);
    }
}
\f
/* **************************************************************** */
/*								    */
/*		      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;
    }
  readline_echoing_p = 1;

#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 (_GO32_)
  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 /* !_GO32_ */
}
#endif /* defined (NEW_TTY_DRIVER) */

#if !defined (NEW_TTY_DRIVER) && !defined(_GO32_)

#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(_GO32_) */

/* Put the terminal in CBREAK mode so that we can detect key presses. */
void
rl_prep_terminal (meta_flag)
     int meta_flag;
{
#if !defined (_GO32_)
  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 /* !_GO32_ */
}

/* Restore the terminal's normal settings and modes. */
void
rl_deprep_terminal ()
{
#if !defined (_GO32_)
  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;
    }

  control_meta_key (0);
  terminal_prepped = 0;

  release_sigint ();
#endif /* !_GO32_ */
}
\f
/* **************************************************************** */
/*								    */
/*			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 */
}
\f
/* **************************************************************** */
/*								    */
/*			Default Key Bindings			    */
/*								    */
/* **************************************************************** */
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 */
}
Commit	Line	Data
166557e7 PB	1	/* rltty.c -- functions to prepare and restore the terminal for readline's
	2	use. */
	3
	4	/* Copyright (C) 1992 Free Software Foundation, Inc.
	5
	6	This file is part of the GNU Readline Library, a library for
	7	reading lines of text with interactive input and history editing.
	8
	9	The GNU Readline Library is free software; you can redistribute it
	10	and/or modify it under the terms of the GNU General Public License
	11	as published by the Free Software Foundation; either version 1, or
	12	(at your option) any later version.
	13
	14	The GNU Readline Library is distributed in the hope that it will be
	15	useful, but WITHOUT ANY WARRANTY; without even the implied warranty
	16	of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	GNU General Public License for more details.
	18
	19	The GNU General Public License is often shipped with GNU software, and
	20	is generally kept in a file called COPYING or LICENSE. If you do not
	21	have a copy of the license, write to the Free Software Foundation,
	22	675 Mass Ave, Cambridge, MA 02139, USA. */
	23	#include <sys/types.h>
	24	#include <signal.h>
	25	#include <errno.h>
	26	#include <stdio.h>
	27
	28	#if defined (HAVE_UNISTD_H)
	29	# include <unistd.h>
	30	#endif /* HAVE_UNISTD_H */
	31
	32	#include "rldefs.h"
	33	#include "readline.h"
	34
	35	#if !defined (errno)
	36	extern int errno;
	37	#endif /* !errno */
	38
	39	extern int readline_echoing_p;
	40	extern int _rl_eof_char;
	41
	42	#if defined (_GO32_)
	43	# include <sys/pc.h>
	44	# undef HANDLE_SIGNALS
	45	#endif /* _GO32_ */
	46
	47	/* **************************************************************** */
	48	/* */
	49	/* Signal Management */
	50	/* */
	51	/* **************************************************************** */
	52
	53	#if defined (HAVE_POSIX_SIGNALS)
	54	static sigset_t sigint_set, sigint_oset;
	55	#else /* !HAVE_POSIX_SIGNALS */
	56	# if defined (HAVE_BSD_SIGNALS)
	57	static int sigint_oldmask;
	58	# endif /* HAVE_BSD_SIGNALS */
	59	#endif /* !HAVE_POSIX_SIGNALS */
	60
	61	static int sigint_blocked = 0;
	62
	63	/* Cause SIGINT to not be delivered until the corresponding call to
	64	release_sigint(). */
65	static void
66	block_sigint ()
67	{
68	if (sigint_blocked)
69	return;
70
71	#if defined (HAVE_POSIX_SIGNALS)
72	sigemptyset (&sigint_set);
73	sigemptyset (&sigint_oset);
74	sigaddset (&sigint_set, SIGINT);
75	sigprocmask (SIG_BLOCK, &sigint_set, &sigint_oset);
76	#else /* !HAVE_POSIX_SIGNALS */
77	# if defined (HAVE_BSD_SIGNALS)
78	sigint_oldmask = sigblock (sigmask (SIGINT));
79	# else /* !HAVE_BSD_SIGNALS */
80	# if defined (HAVE_USG_SIGHOLD)
81	sighold (SIGINT);
82	# endif /* HAVE_USG_SIGHOLD */
83	# endif /* !HAVE_BSD_SIGNALS */
84	#endif /* !HAVE_POSIX_SIGNALS */
85	sigint_blocked = 1;
86	}
87
88	/* Allow SIGINT to be delivered. */
89	static void
90	release_sigint ()
91	{
92	if (!sigint_blocked)
93	return;
94
95	#if defined (HAVE_POSIX_SIGNALS)
96	sigprocmask (SIG_SETMASK, &sigint_oset, (sigset_t *)NULL);
97	#else
98	# if defined (HAVE_BSD_SIGNALS)
99	sigsetmask (sigint_oldmask);
100	# else /* !HAVE_BSD_SIGNALS */
101	# if defined (HAVE_USG_SIGHOLD)
102	sigrelse (SIGINT);
103	# endif /* HAVE_USG_SIGHOLD */
104	# endif /* !HAVE_BSD_SIGNALS */
105	#endif /* !HAVE_POSIX_SIGNALS */
106
107	sigint_blocked = 0;
108	}
109	\f
110	/* **************************************************************** */
111	/* */
112	/* Controlling the Meta Key */
113	/* */
114	/* **************************************************************** */
115
116	extern int term_has_meta;
117	extern char *term_mm;
118	extern char *term_mo;
119
120	static void
121	outchar (c)
122	int c;
123	{
124	putc (c, rl_outstream);
125	}
126
127	/* Turn on/off the meta key depending on ON. */
128	static void
129	control_meta_key (on)
130	int on;
131	{
132	if (term_has_meta)
133	{
134	if (on && term_mm)
135	tputs (term_mm, 1, outchar);
136	else if (!on && term_mo)
137	tputs (term_mo, 1, outchar);
138	}
139	}
140	\f
141	/* **************************************************************** */
142	/* */
143	/* Saving and Restoring the TTY */
144	/* */
145	/* **************************************************************** */
146
147	/* Non-zero means that the terminal is in a prepped state. */
148	static int terminal_prepped = 0;
149
150	/* If non-zero, means that this process has called tcflow(fd, TCOOFF)
151	and output is suspended. */
152	#if defined (__ksr1__)
153	static int ksrflow = 0;
154	#endif
155	#if defined (NEW_TTY_DRIVER)
156
157	/* Values for the `flags' field of a struct bsdtty. This tells which
158	elements of the struct bsdtty have been fetched from the system and
159	are valid. */
160	#define SGTTY_SET 0x01
161	#define LFLAG_SET 0x02
162	#define TCHARS_SET 0x04
163	#define LTCHARS_SET 0x08
164
165	struct bsdtty {
166	struct sgttyb sgttyb; /* Basic BSD tty driver information. */
167	int lflag; /* Local mode flags, like LPASS8. */
168	#if defined (TIOCGETC)
169	struct tchars tchars; /* Terminal special characters, including ^S and ^Q. */
170	#endif
171	#if defined (TIOCGLTC)
172	struct ltchars ltchars; /* 4.2 BSD editing characters */
173	#endif
174	int flags; /* Bitmap saying which parts of the struct are valid. */
175	};
176
177	#define TIOTYPE struct bsdtty
178
179	static TIOTYPE otio;
180
181	static int
182	get_tty_settings (tty, tiop)
183	int tty;
184	TIOTYPE *tiop;
185	{
186	tiop->flags = tiop->lflag = 0;
187
188	ioctl (tty, TIOCGETP, &(tiop->sgttyb));
189	tiop->flags \|= SGTTY_SET;
190
191	#if defined (TIOCLGET)
192	ioctl (tty, TIOCLGET, &(tiop->lflag));
193	tiop->flags \|= LFLAG_SET;
194	#endif
195
196	#if defined (TIOCGETC)
197	ioctl (tty, TIOCGETC, &(tiop->tchars));
198	tiop->flags \|= TCHARS_SET;
199	#endif
200
201	#if defined (TIOCGLTC)
202	ioctl (tty, TIOCGLTC, &(tiop->ltchars));
203	tiop->flags \|= LTCHARS_SET;
204	#endif
205
206	return 0;
207	}
208
209	set_tty_settings (tty, tiop)
210	int tty;
211	TIOTYPE *tiop;
212	{
213	if (tiop->flags & SGTTY_SET)
214	{
215	ioctl (tty, TIOCSETN, &(tiop->sgttyb));
216	tiop->flags &= ~SGTTY_SET;
217	}
218	readline_echoing_p = 1;
219
220	#if defined (TIOCLSET)
221	if (tiop->flags & LFLAG_SET)
222	{
223	ioctl (tty, TIOCLSET, &(tiop->lflag));
224	tiop->flags &= ~LFLAG_SET;
225	}
226	#endif
227
228	#if defined (TIOCSETC)
229	if (tiop->flags & TCHARS_SET)
230	{
231	ioctl (tty, TIOCSETC, &(tiop->tchars));
232	tiop->flags &= ~TCHARS_SET;
233	}
234	#endif
235
236	#if defined (TIOCSLTC)
237	if (tiop->flags & LTCHARS_SET)
238	{
239	ioctl (tty, TIOCSLTC, &(tiop->ltchars));
240	tiop->flags &= ~LTCHARS_SET;
241	}
242	#endif
243
244	return 0;
245	}
246
247	static void
248	prepare_terminal_settings (meta_flag, otio, tiop)
249	int meta_flag;
250	TIOTYPE otio, *tiop;
251	{
252	#if !defined (_GO32_)
253	readline_echoing_p = (otio.sgttyb.sg_flags & ECHO);
254
255	/* Copy the original settings to the structure we're going to use for
256	our settings. */
257	tiop->sgttyb = otio.sgttyb;
258	tiop->lflag = otio.lflag;
259	#if defined (TIOCGETC)
260	tiop->tchars = otio.tchars;
261	#endif
262	#if defined (TIOCGLTC)
263	tiop->ltchars = otio.ltchars;
264	#endif
265	tiop->flags = otio.flags;
266
267	/* First, the basic settings to put us into character-at-a-time, no-echo
268	input mode. */
269	tiop->sgttyb.sg_flags &= ~(ECHO \| CRMOD);
270	tiop->sgttyb.sg_flags \|= CBREAK;
271
272	/* If this terminal doesn't care how the 8th bit is used, then we can
273	use it for the meta-key. If only one of even or odd parity is
274	specified, then the terminal is using parity, and we cannot. */
275	#if !defined (ANYP)
276	# define ANYP (EVENP \| ODDP)
277	#endif
278	if (((otio.sgttyb.sg_flags & ANYP) == ANYP) \|\|
279	((otio.sgttyb.sg_flags & ANYP) == 0))
280	{
281	tiop->sgttyb.sg_flags \|= ANYP;
282
283	/* Hack on local mode flags if we can. */
284	#if defined (TIOCLGET)
285	# if defined (LPASS8)
286	tiop->lflag \|= LPASS8;
287	# endif /* LPASS8 */
288	#endif /* TIOCLGET */
289	}
290
291	#if defined (TIOCGETC)
292	# if defined (USE_XON_XOFF)
293	/* Get rid of terminal output start and stop characters. */
294	tiop->tchars.t_stopc = -1; /* C-s */
295	tiop->tchars.t_startc = -1; /* C-q */
296
297	/* If there is an XON character, bind it to restart the output. */
298	if (otio.tchars.t_startc != -1)
299	rl_bind_key (otio.tchars.t_startc, rl_restart_output);
300	# endif /* USE_XON_XOFF */
301
302	/* If there is an EOF char, bind _rl_eof_char to it. */
303	if (otio.tchars.t_eofc != -1)
304	_rl_eof_char = otio.tchars.t_eofc;
305
306	# if defined (NO_KILL_INTR)
307	/* Get rid of terminal-generated SIGQUIT and SIGINT. */
308	tiop->tchars.t_quitc = -1; /* C-\ */
309	tiop->tchars.t_intrc = -1; /* C-c */
310	# endif /* NO_KILL_INTR */
311	#endif /* TIOCGETC */
312
313	#if defined (TIOCGLTC)
314	/* Make the interrupt keys go away. Just enough to make people happy. */
315	tiop->ltchars.t_dsuspc = -1; /* C-y */
316	tiop->ltchars.t_lnextc = -1; /* C-v */
317	#endif /* TIOCGLTC */
318	#endif /* !_GO32_ */
319	}
320	#endif /* defined (NEW_TTY_DRIVER) */
321
322	#if !defined (NEW_TTY_DRIVER) && !defined(_GO32_)
323
324	#if !defined (VMIN)
325	# define VMIN VEOF
326	#endif
327
328	#if !defined (VTIME)
329	# define VTIME VEOL
330	#endif
331
332	#if defined (TERMIOS_TTY_DRIVER)
333	# define TIOTYPE struct termios
334	# define DRAIN_OUTPUT(fd) tcdrain (fd)
335	# define GETATTR(tty, tiop) (tcgetattr (tty, tiop))
336	# define SETATTR(tty, tiop) (tcsetattr (tty, TCSANOW, tiop))
337	#else
338	# define TIOTYPE struct termio
339	# define DRAIN_OUTPUT(fd)
340	# define GETATTR(tty, tiop) (ioctl (tty, TCGETA, tiop))
341	# define SETATTR(tty, tiop) (ioctl (tty, TCSETA, tiop))
342	#endif /* !TERMIOS_TTY_DRIVER */
343
344	static TIOTYPE otio;
345
346	static int
347	get_tty_settings (tty, tiop)
348	int tty;
349	TIOTYPE *tiop;
350	{
351	while (GETATTR (tty, tiop) < 0)
352	{
353	if (errno != EINTR)
354	return -1;
355	errno = 0;
356	}
357	return 0;
358	}
359
360	static int
361	set_tty_settings (tty, tiop)
362	int tty;
363	TIOTYPE *tiop;
364	{
365	while (SETATTR (tty, tiop) < 0)
366	{
367	if (errno != EINTR)
368	return -1;
369	errno = 0;
370	}
371
372	#if 0
373
374	#if defined (TERMIOS_TTY_DRIVER)
375	# if defined (__ksr1__)
376	if (ksrflow)
377	{
378	ksrflow = 0;
379	tcflow (tty, TCOON);
380	}
381	# else /* !ksr1 */
382	tcflow (tty, TCOON); /* Simulate a ^Q. */
383	# endif /* !ksr1 */
384	#else
385	ioctl (tty, TCXONC, 1); /* Simulate a ^Q. */
386	#endif /* !TERMIOS_TTY_DRIVER */
387
388	#endif
389
390	return 0;
391	}
392
393	static void
394	prepare_terminal_settings (meta_flag, otio, tiop)
395	int meta_flag;
396	TIOTYPE otio, *tiop;
397	{
398	readline_echoing_p = (otio.c_lflag & ECHO);
399
400	tiop->c_lflag &= ~(ICANON \| ECHO);
401
402	if ((unsigned char) otio.c_cc[VEOF] != (unsigned char) _POSIX_VDISABLE)
403	_rl_eof_char = otio.c_cc[VEOF];
404
405	#if defined (USE_XON_XOFF)
406	#if defined (IXANY)
407	tiop->c_iflag &= ~(IXON \| IXOFF \| IXANY);
408	#else
409	/* `strict' Posix systems do not define IXANY. */
410	tiop->c_iflag &= ~(IXON \| IXOFF);
411	#endif /* IXANY */
412	#endif /* USE_XON_XOFF */
413
414	/* Only turn this off if we are using all 8 bits. */
415	if (((tiop->c_cflag & CSIZE) == CS8) \|\| meta_flag)
416	tiop->c_iflag &= ~(ISTRIP \| INPCK);
417
418	/* Make sure we differentiate between CR and NL on input. */
419	tiop->c_iflag &= ~(ICRNL \| INLCR);
420
421	#if !defined (HANDLE_SIGNALS)
422	tiop->c_lflag &= ~ISIG;
423	#else
424	tiop->c_lflag \|= ISIG;
425	#endif
426
427	tiop->c_cc[VMIN] = 1;
428	tiop->c_cc[VTIME] = 0;
429
430	/* Turn off characters that we need on Posix systems with job control,
431	just to be sure. This includes ^Y and ^V. This should not really
432	be necessary. */
433	#if defined (TERMIOS_TTY_DRIVER) && defined (_POSIX_VDISABLE)
434
435	#if defined (VLNEXT)
436	tiop->c_cc[VLNEXT] = _POSIX_VDISABLE;
437	#endif
438
439	#if defined (VDSUSP)
440	tiop->c_cc[VDSUSP] = _POSIX_VDISABLE;
441	#endif
442
443	#endif /* TERMIOS_TTY_DRIVER && _POSIX_VDISABLE */
444	}
445	#endif /* !defined (NEW_TTY_DRIVER) && !defined(_GO32_) */
446
447	/* Put the terminal in CBREAK mode so that we can detect key presses. */
448	void
449	rl_prep_terminal (meta_flag)
450	int meta_flag;
451	{
452	#if !defined (_GO32_)
453	int tty = fileno (rl_instream);
454	TIOTYPE tio;
455
456	if (terminal_prepped)
457	return;
458
459	/* Try to keep this function from being INTerrupted. */
460	block_sigint ();
461
462	if (get_tty_settings (tty, &tio) < 0)
463	{
464	release_sigint ();
465	return;
466	}
467
468	otio = tio;
469
470	prepare_terminal_settings (meta_flag, otio, &tio);
471
472	if (set_tty_settings (tty, &tio) < 0)
473	{
474	release_sigint ();
475	return;
476	}
477
478	control_meta_key (1);
479	terminal_prepped = 1;
480
481	release_sigint ();
482	#endif /* !_GO32_ */
483	}
484
485	/* Restore the terminal's normal settings and modes. */
486	void
487	rl_deprep_terminal ()
488	{
489	#if !defined (_GO32_)
490	int tty = fileno (rl_instream);
491
492	if (!terminal_prepped)
493	return;
494
495	/* Try to keep this function from being INTerrupted. */
496	block_sigint ();
497
498	if (set_tty_settings (tty, &otio) < 0)
499	{
500	release_sigint ();
501	return;
502	}
503
504	control_meta_key (0);
505	terminal_prepped = 0;
506
507	release_sigint ();
508	#endif /* !_GO32_ */
509	}
510	\f
511	/* **************************************************************** */
512	/* */
513	/* Bogus Flow Control */
514	/* */
515	/* **************************************************************** */
516
517	rl_restart_output (count, key)
518	int count, key;
519	{
520	int fildes = fileno (rl_outstream);
521	#if defined (TIOCSTART)
522	#if defined (apollo)
523	ioctl (&fildes, TIOCSTART, 0);
524	#else
525	ioctl (fildes, TIOCSTART, 0);
526	#endif /* apollo */
527
528	#else /* !TIOCSTART */
529	# if defined (TERMIOS_TTY_DRIVER)
530	# if defined (__ksr1__)
531	if (ksrflow)
532	{
533	ksrflow = 0;
534	tcflow (fildes, TCOON);
535	}
536	# else /* !ksr1 */
537	tcflow (fildes, TCOON); /* Simulate a ^Q. */
538	# endif /* !ksr1 */
539	# else /* !TERMIOS_TTY_DRIVER */
540	# if defined (TCXONC)
541	ioctl (fildes, TCXONC, TCOON);
542	# endif /* TCXONC */
543	# endif /* !TERMIOS_TTY_DRIVER */
544	#endif /* !TIOCSTART */
545	}
546
547	rl_stop_output (count, key)
548	int count, key;
549	{
550	int fildes = fileno (rl_instream);
551
552	#if defined (TIOCSTOP)
553	# if defined (apollo)
554	ioctl (&fildes, TIOCSTOP, 0);
555	# else
556	ioctl (fildes, TIOCSTOP, 0);
557	# endif /* apollo */
558	#else /* !TIOCSTOP */
559	# if defined (TERMIOS_TTY_DRIVER)
560	# if defined (__ksr1__)
561	ksrflow = 1;
562	# endif /* ksr1 */
563	tcflow (fildes, TCOOFF);
564	# else
565	# if defined (TCXONC)
566	ioctl (fildes, TCXONC, TCOON);
567	# endif /* TCXONC */
568	# endif /* !TERMIOS_TTY_DRIVER */
569	#endif /* !TIOCSTOP */
570	}
571	\f
572	/* **************************************************************** */
573	/* */
574	/* Default Key Bindings */
575	/* */
576	/* **************************************************************** */
577	void
578	rltty_set_default_bindings (kmap)
579	Keymap kmap;
580	{
581	TIOTYPE ttybuff;
582	int tty = fileno (rl_instream);
583
584	#if defined (NEW_TTY_DRIVER)
585
586	if (get_tty_settings (tty, &ttybuff) == 0)
587	{
588	if (ttybuff.flags & SGTTY_SET)
589	{
590	int erase, kill;
591
592	erase = ttybuff.sgttyb.sg_erase;
593	kill = ttybuff.sgttyb.sg_kill;
594
595	if (erase != -1 && kmap[erase].type == ISFUNC)
596	kmap[erase].function = rl_rubout;
597
598	if (kill != -1 && kmap[kill].type == ISFUNC)
599	kmap[kill].function = rl_unix_line_discard;
600	}
601
602	# if defined (TIOCGLTC)
603
604	if (ttybuff.flags & LTCHARS_SET)
605	{
606	int werase, nextc;
607
608	werase = ttybuff.ltchars.t_werasc;
609	nextc = ttybuff.ltchars.t_lnextc;
610
611	if (werase != -1 && kmap[werase].type == ISFUNC)
612	kmap[werase].function = rl_unix_word_rubout;
613
614	if (nextc != -1 && kmap[nextc].type == ISFUNC)
615	kmap[nextc].function = rl_quoted_insert;
616	}
617	}
618	# endif /* TIOCGLTC */
619
620	#else /* !NEW_TTY_DRIVER */
621
622	if (get_tty_settings (tty, &ttybuff) == 0)
623	{
624	unsigned char erase, kill;
625
626	erase = ttybuff.c_cc[VERASE];
627	kill = ttybuff.c_cc[VKILL];
628
629	if (erase != (unsigned char)_POSIX_VDISABLE &&
630	kmap[erase].type == ISFUNC)
631	kmap[erase].function = rl_rubout;
632
633	if (kill != (unsigned char)_POSIX_VDISABLE &&
634	kmap[kill].type == ISFUNC)
635	kmap[kill].function = rl_unix_line_discard;
636
637	# if defined (VLNEXT) && defined (TERMIOS_TTY_DRIVER)
638	{
639	unsigned char nextc;
640
641	nextc = ttybuff.c_cc[VLNEXT];
642
643	if (nextc != (unsigned char)_POSIX_VDISABLE &&
644	kmap[nextc].type == ISFUNC)
645	kmap[nextc].function = rl_quoted_insert;
646	}
647	# endif /* VLNEXT && TERMIOS_TTY_DRIVER */
648
649	# if defined (VWERASE) && defined (TERMIOS_TTY_DRIVER)
650	{
651	unsigned char werase;
652
653	werase = ttybuff.c_cc[VWERASE];
654
655	if (werase != (unsigned char)_POSIX_VDISABLE &&
656	kmap[werase].type == ISFUNC)
657	kmap[werase].function = rl_unix_word_rubout;
658	}
659	# endif /* VWERASE && TERMIOS_TTY_DRIVER */
660	}
661	#endif /* !NEW_TTY_DRIVER */
662	}