sail/pl_1.c

   1 /*
   2  * Copyright (c) 1983 Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 /*static char sccsid[] = "from: @(#)pl_1.c      5.5 (Berkeley) 2/28/91";*/
  36 static char rcsid[] = "$Id: pl_1.c,v 1.2 1993/08/01 18:51:41 mycroft Exp $";
  37 #endif /* not lint */
  38
  39 #include "player.h"
  40 #include <sys/types.h>
  41 #include <sys/wait.h>
  42
  43 /*
  44  * If we get here before a ship is chosen, then ms == 0 and
  45  * we don't want to update the score file, or do any Write's either.
  46  * We can assume the sync file is already created and may need
  47  * to be removed.
  48  * Of course, we don't do any more Sync()'s if we got here
  49  * because of a Sync() failure.
  50  */
  51 leave(conditions)
  52 int conditions;
  53 {
  54         (void) signal(SIGHUP, SIG_IGN);
  55         (void) signal(SIGINT, SIG_IGN);
  56         (void) signal(SIGQUIT, SIG_IGN);
  57         (void) signal(SIGALRM, SIG_IGN);
  58         (void) signal(SIGCHLD, SIG_IGN);
  59
  60         if (done_curses) {
  61                 Signal("It looks like you've had it!",
  62                         (struct ship *)0);
  63                 switch (conditions) {
  64                 case LEAVE_QUIT:
  65                         break;
  66                 case LEAVE_CAPTURED:
  67                         Signal("Your ship was captured.",
  68                                 (struct ship *)0);
  69                         break;
  70                 case LEAVE_HURRICAN:
  71                         Signal("Hurricane!  All ships destroyed.",
  72                                 (struct ship *)0);
  73                         break;
  74                 case LEAVE_DRIVER:
  75                         Signal("The driver died.", (struct ship *)0);
  76                         break;
  77                 case LEAVE_SYNC:
  78                         Signal("Synchronization error.", (struct ship *)0);
  79                         break;
  80                 default:
  81                         Signal("A funny thing happened (%d).",
  82                                 (struct ship *)0, conditions);
  83                 }
  84         } else {
  85                 switch (conditions) {
  86                 case LEAVE_QUIT:
  87                         break;
  88                 case LEAVE_DRIVER:
  89                         printf("The driver died.\n");
  90                         break;
  91                 case LEAVE_FORK:
  92                         perror("fork");
  93                         break;
  94                 case LEAVE_SYNC:
  95                         printf("Synchronization error\n.");
  96                         break;
  97                 default:
  98                         printf("A funny thing happened (%d).\n",
  99                                 conditions);
 100                 }
 101         }
 102
 103         if (ms != 0) {
 104                 log(ms);
 105                 if (conditions != LEAVE_SYNC) {
 106                         makesignal(ms, "Captain %s relinquishing.",
 107                                 (struct ship *)0, mf->captain);
 108                         Write(W_END, ms, 0, 0, 0, 0, 0);
 109                         (void) Sync();
 110                 }
 111         }
 112         sync_close(!hasdriver);
 113         cleanupscreen();
 114         exit(0);
 115 }
 116
 117 void
 118 choke()
 119 {
 120         leave(LEAVE_QUIT);
 121 }
 122
 123 void
 124 child()
 125 {
 126         union wait status;
 127         int pid;
 128
 129         (void) signal(SIGCHLD, SIG_IGN);
 130         do {
 131                 pid = wait3((int *)&status, WNOHANG, (struct rusage *)0);
 132                 if (pid < 0 || pid > 0 && !WIFSTOPPED(status))
 133                         hasdriver = 0;
 134         } while (pid > 0);
 135         (void) signal(SIGCHLD, child);
 136 }