Must distinguish between "ambiguous" and "unknown" commands.

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

/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.  The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
All rights reserved.\n";
#endif not lint

#ifndef lint
static char sccsid[] = "@(#)reset.c     5.2 (Berkeley) %G%";
#endif not lint

/*
* reset - restore tty to sensible state after crapping out in raw mode.
*/
#include <sgtty.h>

main()
{
       struct sgttyb buf;
       struct tchars tbuf;
       struct ltchars ltbuf;
       static int lclear = LMDMBUF|LLITOUT|LPASS8;

       ioctl(2, TIOCGETP, &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, CERASE);
       reset(&buf.sg_kill, CKILL);
       reset(&tbuf.t_intrc, CINTR);
       reset(&tbuf.t_quitc, CQUIT);
       reset(&tbuf.t_startc, CSTART);
       reset(&tbuf.t_stopc, CSTOP);
       reset(&tbuf.t_eofc, CEOF);
       reset(&ltbuf.t_suspc, CSUSP);
       reset(&ltbuf.t_dsuspc, CDSUSP);
       reset(&ltbuf.t_rprntc, CRPRNT);
       reset(&ltbuf.t_flushc, CFLUSH);
       reset(&ltbuf.t_lnextc, CLNEXT);
       reset(&ltbuf.t_werasc, CWERASE);
       /* brkc is left alone */
       ioctl(2, TIOCLBIC, &lclear);
       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;
}