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pl_1.c revision 1.15 
      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 }
    151