usr.bin/window/mloop.c

   1 /*      @(#)mloop.c     8.1 (Berkeley) 6/6/93   */
   2 /*      $NetBSD: mloop.c,v 1.8 2003/08/07 11:17:27 agc Exp $    */
   3
   4 /*
   5  * Copyright (c) 1983, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * This code is derived from software contributed to Berkeley by
   9  * Edward Wang at The University of California, Berkeley.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/param.h>
  37 #include <unistd.h>
  38 #include "defs.h"
  39
  40 void
  41 mloop(void)
  42 {
  43         while (!quit) {
  44                 if (incmd) {
  45                         docmd();
  46                 } else if (wwcurwin->ww_state != WWS_HASPROC) {
  47                         if (!ISSET(wwcurwin->ww_uflags, WWU_KEEPOPEN))
  48                                 closewin(wwcurwin);
  49                         setcmd(1);
  50                         if (wwpeekc() == escapec)
  51                                 (void) wwgetc();
  52                         error("Process died.");
  53                 } else {
  54                         struct ww *w = wwcurwin;
  55                         char *p;
  56                         int n;
  57
  58                         if (wwibp >= wwibq) {
  59                                 wwibp = wwibq = wwib;
  60                                 wwiomux();
  61                         }
  62                         for (p = wwibp; p < wwibq && wwmaskc(*p) != escapec;
  63                              p++)
  64                                 ;
  65                         if ((n = p - wwibp) > 0) {
  66                                 if (w->ww_type != WWT_PTY &&
  67                                     ISSET(w->ww_pflags, WWP_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 }