BSD 4_3_Tahoe release

[unix-history] / usr / src / ucb / window / mloop.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[] = "@(#)mloop.c     3.13 (Berkeley) 6/29/88";
#endif /* not lint */

#include "defs.h"
#include <sys/signal.h>

mloop()
{
       kill(getpid(), SIGIO);  /* catch typeahead before ASYNC was set */
       while (!quit) {
               if (incmd) {
                       docmd();
               } else if (wwcurwin->ww_state != WWS_HASPROC) {
                       if (!wwcurwin->ww_keepopen)
                               closewin(wwcurwin);
                       setcmd(1);
                       if (wwpeekc() == escapec)
                               (void) wwgetc();
                       error("Process died.");
               } else {
                       register struct ww *w = wwcurwin;
                       register char *p;
                       register n;

                       if (wwibp >= wwibq)
                               wwiomux();
                       for (p = wwibp; p < wwibq && *p != escapec;
                            p++)
                               ;
                       if ((n = p - wwibp) > 0) {
                               if (!w->ww_ispty && w->ww_stopped)
                                       startwin(w);
                               (void) write(w->ww_pty, wwibp, n);
                               wwibp = p;
                       }
                       if (wwpeekc() == escapec) {
                               (void) wwgetc();
                               setcmd(1);
                       }
               }
       }
}