BSD 4_3_Tahoe release

[unix-history] / usr / src / ucb / window / wwtty.c

/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley.  The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/

#ifndef lint
static char sccsid[] = "@(#)wwtty.c     3.12 (Berkeley) 6/29/88";
#endif /* not lint */

#include "ww.h"
#include <fcntl.h>

wwgettty(d, t)
register struct ww_tty *t;
{
       if (ioctl(d, TIOCGETP, (char *)&t->ww_sgttyb) < 0)
               goto bad;
       if (ioctl(d, TIOCGETC, (char *)&t->ww_tchars) < 0)
               goto bad;
       if (ioctl(d, TIOCGLTC, (char *)&t->ww_ltchars) < 0)
               goto bad;
       if (ioctl(d, TIOCLGET, (char *)&t->ww_lmode) < 0)
               goto bad;
       if (ioctl(d, TIOCGETD, (char *)&t->ww_ldisc) < 0)
               goto bad;
       if ((t->ww_fflags = fcntl(d, F_GETFL, 0)) < 0)
               goto bad;
       return 0;
bad:
       wwerrno = WWE_SYS;
       return -1;
}

/*
* Set the modes of tty 'd' to 't'
* 'o' is the current modes.  We set the line discipline only if
* it changes, to avoid unnecessary flushing of typeahead.
*/
wwsettty(d, t, o)
register struct ww_tty *t, *o;
{
       if (ioctl(d, TIOCSETN, (char *)&t->ww_sgttyb) < 0)
               goto bad;
       if (ioctl(d, TIOCSETC, (char *)&t->ww_tchars) < 0)
               goto bad;
       if (ioctl(d, TIOCSLTC, (char *)&t->ww_ltchars) < 0)
               goto bad;
       if (ioctl(d, TIOCLSET, (char *)&t->ww_lmode) < 0)
               goto bad;
       if ((o == 0 || t->ww_ldisc != o->ww_ldisc) &&
           ioctl(d, TIOCSETD, (char *)&t->ww_ldisc) < 0)
               goto bad;
       if (fcntl(d, F_SETFL, t->ww_fflags) < 0)
               goto bad;
       return 0;
bad:
       wwerrno = WWE_SYS;
       return -1;
}