usr.bin/window/mloop.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Edward Wang at The University of California, Berkeley.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * @(#)mloop.c  8.1 (Berkeley) 6/6/93
  37  * $FreeBSD: src/usr.bin/window/mloop.c,v 1.1.1.1.14.1 2001/05/17 09:45:00 obrien Exp $
  38  * $DragonFly: src/usr.bin/window/mloop.c,v 1.2 2003/06/17 04:29:34 dillon Exp $
  39  */
  40
  41 #include <sys/param.h>
  42 #include "defs.h"
  43
  44 mloop()
  45 {
  46         while (!quit) {
  47                 if (incmd) {
  48                         docmd();
  49                 } else if (wwcurwin->ww_state != WWS_HASPROC) {
  50                         if (!wwcurwin->ww_keepopen)
  51                                 closewin(wwcurwin);
  52                         setcmd(1);
  53                         if (wwpeekc() == escapec)
  54                                 (void) wwgetc();
  55                         error("Process died.");
  56                 } else {
  57                         register struct ww *w = wwcurwin;
  58                         register char *p;
  59                         register n;
  60
  61                         if (wwibp >= wwibq)
  62                                 wwiomux();
  63                         for (p = wwibp; p < wwibq && wwmaskc(*p) != escapec;
  64                              p++)
  65                                 ;
  66                         if ((n = p - wwibp) > 0) {
  67                                 if (!w->ww_ispty && w->ww_stopped)
  68                                         startwin(w);
  69 #if defined(sun) && !defined(BSD)
  70                                 /* workaround for SunOS pty bug */
  71                                 while (--n >= 0)
  72                                         (void) write(w->ww_pty, wwibp++, 1);
  73 #else
  74                                 (void) write(w->ww_pty, wwibp, n);
  75                                 wwibp = p;
  76 #endif
  77                         }
  78                         if (wwpeekc() == escapec) {
  79                                 (void) wwgetc();
  80                                 setcmd(1);
  81                         }
  82                 }
  83         }
  84 }