usr.bin/window/mloop.c

   1 /*      $NetBSD: mloop.c,v 1.7 2002/06/14 01:06:53 wiz Exp $    */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Edward Wang at The University of California, Berkeley.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)mloop.c     8.1 (Berkeley) 6/6/93";
  39 #else
  40 __RCSID("$NetBSD: mloop.c,v 1.7 2002/06/14 01:06:53 wiz Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 #include <sys/param.h>
  45 #include <unistd.h>
  46 #include "defs.h"
  47
  48 void
  49 mloop(void)
  50 {
  51         while (!quit) {
  52                 if (incmd) {
  53                         docmd();
  54                 } else if (wwcurwin->ww_state != WWS_HASPROC) {
  55                         if (!ISSET(wwcurwin->ww_uflags, WWU_KEEPOPEN))
  56                                 closewin(wwcurwin);
  57                         setcmd(1);
  58                         if (wwpeekc() == escapec)
  59                                 (void) wwgetc();
  60                         error("Process died.");
  61                 } else {
  62                         struct ww *w = wwcurwin;
  63                         char *p;
  64                         int n;
  65
  66                         if (wwibp >= wwibq) {
  67                                 wwibp = wwibq = wwib;
  68                                 wwiomux();
  69                         }
  70                         for (p = wwibp; p < wwibq && wwmaskc(*p) != escapec;
  71                              p++)
  72                                 ;
  73                         if ((n = p - wwibp) > 0) {
  74                                 if (w->ww_type != WWT_PTY &&
  75                                     ISSET(w->ww_pflags, WWP_STOPPED))
  76                                         startwin(w);
  77 #if defined(sun) && !defined(BSD)
  78                                 /* workaround for SunOS pty bug */
  79                                 while (--n >= 0)
  80                                         (void) write(w->ww_pty, wwibp++, 1);
  81 #else
  82                                 (void) write(w->ww_pty, wwibp, n);
  83                                 wwibp = p;
  84 #endif
  85                         }
  86                         if (wwpeekc() == escapec) {
  87                                 (void) wwgetc();
  88                                 setcmd(1);
  89                         }
  90                 }
  91         }
  92 }