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/* WRITE TTY ROUTINES -- Routine to get user's tty in and out of cbreak mode.
*/
#include "write.h"
#ifdef F_TERMIO
#include <termio.h>
#endif /*F_TERMIO*/
#ifdef F_TERMIOS
#include <termios.h>
#endif /*F_TERMIOS*/
#ifdef F_STTY
#include <sgtty.h>
#endif /*F_STTY*/
#if !defined(TCFLSH) && !defined(TCIFLUSH)
#include <sys/file.h>
#endif
char eof_char; /* User's end of file character */
char bs_char; /* User's backspace character */
char kill_char; /* User's kill character */
/* CBREAK: cbreak(TRUE) turns on cbreak mode, cbreak(FALSE) restores the
* original tty modes.
*/
#ifdef F_STTY
void cbreak(bool flag)
{
struct tchars ctrlchars;
static struct sgttyb sgtty;
static tfg;
if (flag)
{
/* Get current modes */
ioctl(0,TIOCGETP,&sgtty);
tfg= sgtty.sg_flags;
bs_char= sgtty.sg_erase;
kill_char= sgtty.sg_kill;
ioctl(0,TIOCGETC,&ctrlchars);
eof_char= ctrlchars.t_eofc;
/* Remember that we are in cbreak mode */
in_cbreak= TRUE;
/* Turn on cbreak mode */
sgtty.sg_flags &= ~ECHO;
sgtty.sg_flags |= CBREAK;
ioctl(0,TIOCSETN,&sgtty);
}
else
{
/* Turn off cbreak mode - that is restore original modes */
sgtty.sg_flags= tfg;
ioctl(0,TIOCSETN,&sgtty);
in_cbreak= FALSE;
}
}
#endif /*F_STTY*/
#ifdef F_TERMIO
void cbreak(bool flag)
{
static struct termio tio;
static tfg;
static char eol_char;
if (flag)
{
/* Get current modes */
ioctl(0,TCGETA,&tio);
tfg= tio.c_lflag;
eof_char= tio.c_cc[VEOF];
eol_char= tio.c_cc[VEOL];
bs_char= tio.c_cc[VERASE];
kill_char= tio.c_cc[VKILL];
/* Remember that we are in cbreak mode */
in_cbreak= TRUE;
/* Turn on cbreak mode - that is turn off ICANON */
tio.c_lflag= tfg & ~ICANON;
tio.c_lflag &= ~ECHO;
tio.c_cc[VEOF]= 1;
tio.c_cc[VEOL]= 0;
ioctl(0,TCSETA,&tio);
}
else
{
/* Turn off cbreak mode - that is restore original modes */
tio.c_lflag= tfg;
tio.c_cc[VEOF]= eof_char;
tio.c_cc[VEOL]= eol_char;
ioctl(0,TCSETA,&tio);
in_cbreak= FALSE;
}
}
#endif /*F_TERMIO*/
#ifdef F_TERMIOS
void cbreak(bool flag)
{
static struct termios tio;
static tfg;
static char eol_char;
if (flag)
{
/* Get current modes */
tcgetattr(0,&tio);
tfg= tio.c_lflag;
eof_char= tio.c_cc[VEOF];
eol_char= tio.c_cc[VEOL];
bs_char= tio.c_cc[VERASE];
kill_char= tio.c_cc[VKILL];
/* Remember that we are in cbreak mode */
in_cbreak= TRUE;
/* Turn on cbreak mode - that is turn off ICANON */
tio.c_lflag= tfg & ~ICANON;
tio.c_lflag &= ~ECHO;
tio.c_cc[VEOF]= 1;
tio.c_cc[VEOL]= 0;
tcsetattr(0,TCSANOW,&tio);
}
else
{
/* Turn off cbreak mode - that is restore original modes */
tio.c_lflag= tfg;
tio.c_cc[VEOF]= eof_char;
tio.c_cc[VEOL]= eol_char;
tcsetattr(0,TCSANOW,&tio);
in_cbreak= FALSE;
}
}
#endif /*F_TERMIOS*/
/* FLUSHINPUT: Flush input on tty on filedescriptor dev.
*/
void flushinput(int dev)
{
#ifdef TCIFLUSH
tcflush(dev, TCIFLUSH); /* TERMIOS way to flush input */
#else
#ifdef TCFLSH
ioctl(dev,TCFLSH,0); /* SysIII way to flush input */
#else
int flushcode= FREAD;
ioctl(dev,TIOCFLUSH,&flushcode); /* BSD way to flush input */
#endif /*TCFLSH*/
#endif /*TCIFLUSH*/
}
/* GET_COLS: Return number of columns on user's terminal. Sort of. Since
* this is going to be used for wrapping on both my terminal and his, we
* won't let it be more than 80, since his terminal probably doesn't have
* more than 80 columns even if ours does.
*/
int get_cols()
{
#ifdef TIOCGWINSZ
struct winsize x;
ioctl(2,TIOCGWINSZ,&x);
if (x.ws_col == 0 || x.ws_col > 80)
return(80);
else
return(x.ws_col);
#else
return(80);
#endif
}
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