sail/pl_1.c

   1 /*      $NetBSD: pl_1.c,v 1.15 2001/01/16 02:44:43 cgd Exp $    */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. 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/cdefs.h>
  37 #ifndef lint
  38 #if 0
  39 static char sccsid[] = "@(#)pl_1.c      8.1 (Berkeley) 5/31/93";
  40 #else
  41 __RCSID("$NetBSD: pl_1.c,v 1.15 2001/01/16 02:44:43 cgd Exp $");
  42 #endif
  43 #endif /* not lint */
  44
  45 #include <sys/types.h>
  46 #include <sys/wait.h>
  47 #include <signal.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <unistd.h>
  51 #include "extern.h"
  52 #include "player.h"
  53
  54 void    leave(int) __attribute__((__noreturn__));
  55 void    choke(int) __attribute__((__noreturn__));
  56 void    child(int);
  57
  58 /*
  59  * If we get here before a ship is chosen, then ms == 0 and
  60  * we don't want to update the score file, or do any Write's either.
  61  * We can assume the sync file is already created and may need
  62  * to be removed.
  63  * Of course, we don't do any more Sync()'s if we got here
  64  * because of a Sync() failure.
  65  */
  66 void
  67 leave(int conditions)
  68 {
  69         signal(SIGHUP, SIG_IGN);
  70         signal(SIGINT, SIG_IGN);
  71         signal(SIGQUIT, SIG_IGN);
  72         signal(SIGALRM, SIG_IGN);
  73         signal(SIGCHLD, SIG_IGN);
  74
  75         if (done_curses) {
  76                 Msg("It looks like you've had it!");
  77                 switch (conditions) {
  78                 case LEAVE_QUIT:
  79                         break;
  80                 case LEAVE_CAPTURED:
  81                         Msg("Your ship was captured.");
  82                         break;
  83                 case LEAVE_HURRICAN:
  84                         Msg("Hurricane!  All ships destroyed.");
  85                         break;
  86                 case LEAVE_DRIVER:
  87                         Msg("The driver died.");
  88                         break;
  89                 case LEAVE_SYNC:
  90                         Msg("Synchronization error.");
  91                         break;
  92                 default:
  93                         Msg("A funny thing happened (%d).", conditions);
  94                 }
  95         } else {
  96                 switch (conditions) {
  97                 case LEAVE_QUIT:
  98                         break;
  99                 case LEAVE_DRIVER:
 100                         printf("The driver died.\n");
 101                         break;
 102                 case LEAVE_FORK:
 103                         perror("fork");
 104                         break;
 105                 case LEAVE_SYNC:
 106                         printf("Synchronization error\n.");
 107                         break;
 108                 default:
 109                         printf("A funny thing happened (%d).\n",
 110                                 conditions);
 111                 }
 112         }
 113
 114         if (ms != 0) {
 115                 logger(ms);
 116                 if (conditions != LEAVE_SYNC) {
 117                         makemsg(ms, "Captain %s relinquishing.",
 118                                 mf->captain);
 119                         Write(W_END, ms, 0, 0, 0, 0);
 120                         Sync();
 121                 }
 122         }
 123         sync_close(!hasdriver);
 124         sleep(5);
 125         cleanupscreen();
 126         exit(0);
 127 }
 128
 129 /*ARGSUSED*/
 130 void
 131 choke(int n __attribute__((__unused__)))
 132 {
 133         leave(LEAVE_QUIT);
 134 }
 135
 136 /*ARGSUSED*/
 137 void
 138 child(int n __attribute__((__unused__)))
 139 {
 140         union wait status;
 141         int pid;
 142
 143         signal(SIGCHLD, SIG_IGN);
 144         do {
 145                 pid = wait3((int *)&status, WNOHANG, (struct rusage *)0);
 146                 if (pid < 0 || (pid > 0 && !WIFSTOPPED(status)))
 147                         hasdriver = 0;
 148         } while (pid > 0);
 149         signal(SIGCHLD, child);
 150 }