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raw.brk
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1997-02-05
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5KB
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217 lines
/*
* TTY setup routines. These are the BSD-style routines.
*/
static struct sgttyb _raw_tty, _original_tty;
static struct ltchars _raw_ltchars, _original_ltchars;
static struct tchars _raw_tchars, _original_tchars;
static int _raw_lmode, _original_lmode;
/*
* current raw state
*/
static short _inraw = 0;
/*
* Set up the tty driver
*
* Args: state -- which state to put it in. 1 means go into raw (cbreak),
* 0 out of raw.
*
* Result: returns 0 if successful and -1 if not.
*/
int
Raw(state)
int state;
{
/** state is either ON or OFF, as indicated by call **/
/* Check return code only on first call. If it fails we're done for and
if it goes OK the others will probably go OK too. */
if(state == 0 && _inraw){
/*----- restore state to original -----*/
if(ioctl(STDIN_FD, TIOCSETP, &_original_tty) < 0)
return(-1);
(void)ioctl(STDIN_FD, TIOCSLTC, &_original_ltchars);
(void)ioctl(STDIN_FD, TIOCSETC, &_original_tchars);
(void)ioctl(STDIN_FD, TIOCLSET, &_original_lmode);
_inraw = 0;
}
else if(state == 1 && ! _inraw){
/*----- Go into raw mode (cbreak actually) ----*/
if(ioctl(STDIN_FD, TIOCGETP, &_original_tty) < 0)
return(-1);
(void)ioctl(STDIN_FD, TIOCGETP, &_raw_tty);
(void)ioctl(STDIN_FD, TIOCGETC, &_original_tchars);
(void)ioctl(STDIN_FD, TIOCGETC, &_raw_tchars);
(void)ioctl(STDIN_FD, TIOCGLTC, &_original_ltchars);
(void)ioctl(STDIN_FD, TIOCGLTC, &_raw_ltchars);
(void)ioctl(STDIN_FD, TIOCLGET, &_original_lmode);
(void)ioctl(STDIN_FD, TIOCLGET, &_raw_lmode);
_raw_tty.sg_flags &= ~(ECHO); /* echo off */
_raw_tty.sg_flags |= CBREAK; /* raw on */
_raw_tty.sg_flags &= ~CRMOD; /* Turn off CR -> LF mapping */
_raw_tchars.t_intrc = -1; /* Turn off ^C and ^D */
_raw_tchars.t_eofc = -1;
_raw_ltchars.t_lnextc = -1; /* Turn off ^V so we can use it */
_raw_ltchars.t_dsuspc = -1; /* Turn off ^Y so we can use it */
_raw_ltchars.t_suspc = -1; /* Turn off ^Z; we just read 'em */
_raw_ltchars.t_werasc = -1; /* Turn off ^w word erase */
_raw_ltchars.t_rprntc = -1; /* Turn off ^R reprint line */
_raw_ltchars.t_flushc = -1; /* Turn off ^O output flush */
(void)ioctl(STDIN_FD, TIOCSETP, &_raw_tty);
(void)ioctl(STDIN_FD, TIOCSLTC, &_raw_ltchars);
(void)ioctl(STDIN_FD, TIOCSETC, &_raw_tchars);
(void)ioctl(STDIN_FD, TIOCLSET, &_raw_lmode);
_inraw = 1;
}
return(0);
}
/*
* Set up the tty driver to use XON/XOFF flow control
*
* Args: state -- True to make sure XON/XOFF turned on, FALSE off.
*
* Result: none.
*/
void
xonxoff_proc(state)
int state;
{
if(_inraw){
if(state){
if(_raw_tchars.t_startc == -1 || _raw_tchars.t_stopc == -1){
_raw_tchars.t_startc = 'Q' - '@'; /* Turn ON ^S/^Q */
_raw_tchars.t_stopc = 'S' - '@';
(void)ioctl(STDIN_FD, TIOCSETC, &_raw_tchars);
}
}
else{
if(!(_raw_tchars.t_startc == -1 && _raw_tchars.t_stopc == -1)){
_raw_tchars.t_startc = -1; /* Turn off ^S/^Q */
_raw_tchars.t_stopc = -1;
(void)ioctl(STDIN_FD, TIOCSETC, &_raw_tchars);
}
}
}
}
/*
* Set up the tty driver to do LF->CR translation
*
* Args: state -- True to turn on translation, false to write raw LF's
*
* Result: none.
*/
void
crlf_proc(state)
int state;
{
if(_inraw){
if(state){ /* turn ON NL->CR on output */
if(!(_raw_tty.sg_flags & CRMOD)){
_raw_tty.sg_flags |= CRMOD;
(void)ioctl(STDIN_FD, TIOCSETP, &_raw_tty);
}
}
else{ /* turn OFF NL-CR on output */
if(_raw_tty.sg_flags & CRMOD){
_raw_tty.sg_flags &= ~CRMOD;
(void)ioctl(STDIN_FD, TIOCSETP, &_raw_tty);
}
}
}
}
/*
* Set up the tty driver to hanle interrupt char
*
* Args: state -- True to turn on interrupt char, false to not
*
* Result: tty driver that'll send us SIGINT or not
*/
void
intr_proc(state)
int state;
{
if(_inraw){
if(state){
_raw_tchars.t_intrc = ctrl('C');
(void)ioctl(STDIN_FD, TIOCSETC, &_raw_tchars);
}
else{
_raw_tchars.t_intrc = -1;
(void)ioctl(STDIN_FD, TIOCSETC, &_raw_tchars);
}
}
}
/*
* Discard any pending input characters
*
* Args: none
*
* Result: pending input buffer flushed
*/
void
flush_input()
{
#ifdef TIOCFLUSH
#ifdef FREAD
int i = FREAD;
#else
int i = 1;
#endif
ioctl(STDIN_FD, TIOCFLUSH, &i);
#endif /* TIOCFLUSH */
}
/*
* Turn off hi bit stripping
*/
void
bit_strip_off()
{
_raw_lmode |= LPASS8;
#ifdef NXT
_raw_lmode |= LPASS8OUT;
#endif
(void)ioctl(STDIN_FD, TIOCLSET, &_raw_lmode);
}
/*
* Turn off quit character (^\) if possible
*/
void
quit_char_off()
{
_raw_tchars.t_quitc = -1;
(void)ioctl(STDIN_FD, TIOCSETC, &_raw_tchars);
}
/*
* Returns TRUE if tty is < 4800, 0 otherwise.
*/
int
ttisslow()
{
return((int)_raw_tty.sg_ispeed < B4800);
}