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/* Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash 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 2, or (at your option) any later
version.
Bash 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.
You should have received a copy of the GNU General Public License along
with Bash; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
/*
* shtty.c -- abstract interface to the terminal, focusing on capabilities.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <shtty.h>
static TTYSTRUCT ttin, ttout;
static int ttsaved = 0;
int
ttgetattr(fd, ttp)
int fd;
TTYSTRUCT *ttp;
{
#ifdef TERMIOS_TTY_DRIVER
return tcgetattr(fd, ttp);
#else
# ifdef TERMIO_TTY_DRIVER
return ioctl(fd, TCGETA, ttp);
# else
return ioctl(fd, TIOCGETP, ttp);
# endif
#endif
}
int
ttsetattr(fd, ttp)
int fd;
TTYSTRUCT *ttp;
{
#ifdef TERMIOS_TTY_DRIVER
return tcsetattr(fd, TCSADRAIN, ttp);
#else
# ifdef TERMIO_TTY_DRIVER
return ioctl(fd, TCSETAW, ttp);
# else
return ioctl(fd, TIOCSETN, ttp);
# endif
#endif
}
void
ttsave()
{
if (ttsaved)
return;
ttgetattr (0, &ttin);
ttgetattr (1, &ttout);
ttsaved = 1;
}
void
ttrestore()
{
if (ttsaved == 0)
return;
ttsetattr (0, &ttin);
ttsetattr (1, &ttout);
ttsaved = 0;
}
/* Retrieve the attributes associated with tty fd FD. */
TTYSTRUCT *
ttattr (fd)
int fd;
{
if (ttsaved == 0)
return ((TTYSTRUCT *)0);
if (fd == 0)
return &ttin;
else if (fd == 1)
return &ttout;
else
return ((TTYSTRUCT *)0);
}
/*
* Change attributes in ttp so that when it is installed using
* ttsetattr, the terminal will be in one-char-at-a-time mode.
*/
int
tt_setonechar(ttp)
TTYSTRUCT *ttp;
{
#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER)
/* XXX - might not want this -- it disables erase and kill processing. */
ttp->c_lflag &= ~ICANON;
ttp->c_lflag |= ISIG;
# ifdef IEXTEN
ttp->c_lflag |= IEXTEN;
# endif
ttp->c_iflag |= ICRNL; /* make sure we get CR->NL on input */
ttp->c_iflag &= ~INLCR; /* but no NL->CR */
# ifdef OPOST
ttp->c_oflag |= OPOST;
# endif
# ifdef ONLCR
ttp->c_oflag |= ONLCR;
# endif
# ifdef OCRNL
ttp->c_oflag &= ~OCRNL;
# endif
# ifdef ONOCR
ttp->c_oflag &= ~ONOCR;
# endif
# ifdef ONLRET
ttp->c_oflag &= ~ONLRET;
# endif
ttp->c_cc[VMIN] = 1;
ttp->c_cc[VTIME] = 0;
#else
ttp->sg_flags |= CBREAK;
#endif
return 0;
}
/* Set the terminal into one-character-at-a-time mode */
int
ttonechar ()
{
TTYSTRUCT tt;
if (ttsaved == 0)
return -1;
tt = ttin;
if (tt_setonechar(&tt) < 0)
return -1;
return (ttsetattr (0, &tt));
}
/*
* Change attributes in ttp so that when it is installed using
* ttsetattr, the terminal will be in no-echo mode.
*/
int
tt_setnoecho(ttp)
TTYSTRUCT *ttp;
{
#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER)
ttp->c_lflag &= ~(ECHO|ECHOK|ECHONL);
#else
ttp->sg_flags &= ~ECHO;
#endif
return 0;
}
/* Set the terminal into no-echo mode */
int
ttnoecho ()
{
TTYSTRUCT tt;
if (ttsaved == 0)
return -1;
tt = ttin;
if (tt_setnoecho (&tt) < 0)
return -1;
return (ttsetattr (0, &tt));
}
/*
* Change attributes in ttp so that when it is installed using
* ttsetattr, the terminal will be in eight-bit mode (pass8).
*/
int
tt_seteightbit (ttp)
TTYSTRUCT *ttp;
{
#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER)
ttp->c_iflag &= ~ISTRIP;
ttp->c_cflag |= CS8;
ttp->c_cflag &= ~PARENB;
#else
ttp->sg_flags |= ANYP;
#endif
return 0;
}
/* Set the terminal into eight-bit mode */
int
tteightbit ()
{
TTYSTRUCT tt;
if (ttsaved == 0)
return -1;
tt = ttin;
if (tt_seteightbit (&tt) < 0)
return -1;
return (ttsetattr (0, &tt));
}
/*
* Change attributes in ttp so that when it is installed using
* ttsetattr, the terminal will be in non-canonical input mode.
*/
int
tt_setnocanon (ttp)
TTYSTRUCT *ttp;
{
#if defined (TERMIOS_TTY_DRIVER) || defined (TERMIO_TTY_DRIVER)
ttp->c_lflag &= ~ICANON;
#endif
return 0;
}
/* Set the terminal into non-canonical mode */
int
ttnocanon ()
{
TTYSTRUCT tt;
if (ttsaved == 0)
return -1;
tt = ttin;
if (tt_setnocanon (&tt) < 0)
return -1;
return (ttsetattr (0, &tt));
}
/*
* Change attributes in ttp so that when it is installed using
* ttsetattr, the terminal will be in cbreak, no-echo mode.
*/
int
tt_setcbreak(ttp)
TTYSTRUCT *ttp;
{
if (tt_setonechar (ttp) < 0)
return -1;
return (tt_setnoecho (ttp));
}
/* Set the terminal into cbreak (no-echo, one-character-at-a-time) mode */
int
ttcbreak ()
{
TTYSTRUCT tt;
if (ttsaved == 0)
return -1;
tt = ttin;
if (tt_setcbreak (&tt) < 0)
return -1;
return (ttsetattr (0, &tt));
}
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