hellisabove
179 lines
3.5 KiB
Io
179 lines
3.5 KiB
Io
/*
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* TTY setup routines. These are the TERMIO-style (System V) routines.
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*/
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static struct termio _raw_tty, _original_tty;
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/*
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* current raw state
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*/
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static short _inraw = 0;
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/*
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* Set up the tty driver
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*
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* Args: state -- which state to put it in. 1 means go into raw (cbreak),
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* 0 out of raw.
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*
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* Result: returns 0 if successful and -1 if not.
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*/
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int
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Raw(state)
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int state;
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{
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/** state is either ON or OFF, as indicated by call **/
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/* Check return code only on first call. If it fails we're done for and
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if it goes OK the others will probably go OK too. */
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if(state == 0 && _inraw){
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/*----- restore state to original -----*/
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if(ioctl(STDIN_FD, TCSETAW, &_original_tty) < 0)
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return(-1);
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_inraw = 0;
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}
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else if(state == 1 && ! _inraw){
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/*----- Go into raw mode (cbreak actually) ----*/
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if(ioctl(STDIN_FD, TCGETA, &_original_tty) < 0)
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return(-1);
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(void)ioctl(STDIN_FD, TCGETA, &_raw_tty); /** again! **/
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_raw_tty.c_lflag &= ~(ICANON | ECHO); /* noecho raw mode */
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_raw_tty.c_lflag &= ~ISIG; /* disable signals */
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_raw_tty.c_iflag &= ~ICRNL; /* turn off CR->NL on input */
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_raw_tty.c_oflag &= ~ONLCR; /* turn off NL->CR on output */
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_raw_tty.c_cc[VMIN] = 1; /* min # of chars to queue */
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_raw_tty.c_cc[VTIME] = 0; /* min time to wait for input*/
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_raw_tty.c_cc[VINTR] = ctrl('C'); /* make it our special char */
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_raw_tty.c_cc[VQUIT] = 0;
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(void)ioctl(STDIN_FD, TCSETAW, &_raw_tty);
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_inraw = 1;
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}
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return(0);
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}
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/*
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* Set up the tty driver to use XON/XOFF flow control
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*
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* Args: state -- True to make sure XON/XOFF turned on, FALSE off.
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*
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* Result: none.
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*/
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void
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xonxoff_proc(state)
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int state;
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{
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if(_inraw){
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if(state){
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if(!(_raw_tty.c_iflag & IXON)){
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_raw_tty.c_iflag |= IXON; /* turn ON ^S/^Q on input */
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(void)ioctl(STDIN_FD, TCSETAW, &_raw_tty);
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}
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}
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else{
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if(_raw_tty.c_iflag & IXON){
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_raw_tty.c_iflag &= ~IXON; /* turn off ^S/^Q on input */
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(void)ioctl(STDIN_FD, TCSETAW, &_raw_tty);
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}
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}
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}
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}
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/*
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* Set up the tty driver to do LF->CR translation
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*
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* Args: state -- True to turn on translation, false to write raw LF's
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*
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* Result: none.
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*/
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void
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crlf_proc(state)
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int state;
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{
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if(_inraw){
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if(state){ /* turn ON NL->CR on output */
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if(!(_raw_tty.c_oflag & ONLCR)){
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_raw_tty.c_oflag |= ONLCR;
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(void)ioctl(STDIN_FD, TCSETAW, &_raw_tty);
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}
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}
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else{ /* turn OFF NL-CR on output */
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if(_raw_tty.c_oflag & ONLCR){
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_raw_tty.c_oflag &= ~ONLCR;
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(void)ioctl(STDIN_FD, TCSETAW, &_raw_tty);
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}
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}
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}
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}
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/*
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* Set up the tty driver to hanle interrupt char
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*
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* Args: state -- True to turn on interrupt char, false to not
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*
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* Result: tty driver that'll send us SIGINT or not
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*/
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void
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intr_proc(state)
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int state;
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{
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if(_inraw){
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if(state){
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_raw_tty.c_lflag |= ISIG; /* enable signals */
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(void)ioctl(STDIN_FD, TCSETAW, &_raw_tty);
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}
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else{
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_raw_tty.c_lflag &= ~ISIG; /* disable signals */
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(void)ioctl(STDIN_FD, TCSETAW, &_raw_tty);
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}
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}
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}
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/*
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* Discard any pending input characters
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*
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* Args: none
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*
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* Result: pending input buffer flushed
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*/
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void
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flush_input()
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{
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ioctl(STDIN_FD, TCFLSH, 0);
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}
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/*
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* Turn off hi bit stripping
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*/
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void
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bit_strip_off()
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{
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}
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/*
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* Turn off quit character (^\) if possible
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*/
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void
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quit_char_off()
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{
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}
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/*
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* Returns TRUE if tty is < 4800, 0 otherwise.
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*/
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int
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ttisslow()
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{
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return((_raw_tty.c_cflag&CBAUD) < (unsigned int)B4800);
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}
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