add "ap" and "fp" notion, fix SUCC and PRED

[unix-history] / usr / src / usr.bin / tset / reset.c

static  char *sccsid = "@(#)reset.c     4.3 (Berkeley) %G%";
/*
* reset - restore tty to sensible state after crapping out in raw mode.
*/
#include <sgtty.h>

#define CTRL(x) ('x'&037)

main()
{
       struct sgttyb buf;
       struct tchars tbuf;
       struct ltchars ltbuf;

       gtty(2, &buf);
       ioctl(2, TIOCGETC, &tbuf);
       ioctl(2, TIOCGLTC, &ltbuf);
       buf.sg_flags &= ~(RAW|CBREAK|VTDELAY|ALLDELAY);
       buf.sg_flags |= XTABS|ECHO|CRMOD|ANYP;
       reset(&buf.sg_erase, CTRL(h));
       reset(&buf.sg_kill, '@');
       reset(&tbuf.t_intrc, 0177);
       reset(&tbuf.t_quitc, CTRL(\\\\));
       reset(&tbuf.t_startc, CTRL(q));
       reset(&tbuf.t_stopc, CTRL(s));
       reset(&tbuf.t_eofc, CTRL(d));
       reset(&ltbuf.t_suspc, CTRL(z));
       reset(&ltbuf.t_dsuspc, CTRL(y));
       reset(&ltbuf.t_rprntc, CTRL(r));
       reset(&ltbuf.t_flushc, CTRL(o));
       reset(&ltbuf.t_lnextc, CTRL(v));
       reset(&ltbuf.t_werasc, CTRL(w));
       /* brkc is left alone */
       ioctl(2, TIOCSETN, &buf);
       ioctl(2, TIOCSETC, &tbuf);
       ioctl(2, TIOCSLTC, &ltbuf);
       execlp("tset", "tset", "-Q", "-I", 0);  /* fix term dependent stuff */
       exit(1);
}

reset(cp, def)
       char *cp;
       int def;
{

       if (*cp == 0 || (*cp&0377)==0377)
               *cp = def;
}