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pl_1.c revision 1.1 
      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[] = "@(#)pl_1.c	5.5 (Berkeley) 2/28/91";
     36 #endif /* not lint */
     37 
     38 #include "player.h"
     39 #include <sys/types.h>
     40 #include <sys/wait.h>
     41 
     42 /*
     43  * If we get here before a ship is chosen, then ms == 0 and
     44  * we don't want to update the score file, or do any Write's either.
     45  * We can assume the sync file is already created and may need
     46  * to be removed.
     47  * Of course, we don't do any more Sync()'s if we got here
     48  * because of a Sync() failure.
     49  */
     50 leave(conditions)
     51 int conditions;
     52 {
     53 	(void) signal(SIGHUP, SIG_IGN);
     54 	(void) signal(SIGINT, SIG_IGN);
     55 	(void) signal(SIGQUIT, SIG_IGN);
     56 	(void) signal(SIGALRM, SIG_IGN);
     57 	(void) signal(SIGCHLD, SIG_IGN);
     58 
     59 	if (done_curses) {
     60 		Signal("It looks like you've had it!",
     61 			(struct ship *)0);
     62 		switch (conditions) {
     63 		case LEAVE_QUIT:
     64 			break;
     65 		case LEAVE_CAPTURED:
     66 			Signal("Your ship was captured.",
     67 				(struct ship *)0);
     68 			break;
     69 		case LEAVE_HURRICAN:
     70 			Signal("Hurricane!  All ships destroyed.",
     71 				(struct ship *)0);
     72 			break;
     73 		case LEAVE_DRIVER:
     74 			Signal("The driver died.", (struct ship *)0);
     75 			break;
     76 		case LEAVE_SYNC:
     77 			Signal("Synchronization error.", (struct ship *)0);
     78 			break;
     79 		default:
     80 			Signal("A funny thing happened (%d).",
     81 				(struct ship *)0, conditions);
     82 		}
     83 	} else {
     84 		switch (conditions) {
     85 		case LEAVE_QUIT:
     86 			break;
     87 		case LEAVE_DRIVER:
     88 			printf("The driver died.\n");
     89 			break;
     90 		case LEAVE_FORK:
     91 			perror("fork");
     92 			break;
     93 		case LEAVE_SYNC:
     94 			printf("Synchronization error\n.");
     95 			break;
     96 		default:
     97 			printf("A funny thing happened (%d).\n",
     98 				conditions);
     99 		}
    100 	}
    101 
    102 	if (ms != 0) {
    103 		log(ms);
    104 		if (conditions != LEAVE_SYNC) {
    105 			makesignal(ms, "Captain %s relinquishing.",
    106 				(struct ship *)0, mf->captain);
    107 			Write(W_END, ms, 0, 0, 0, 0, 0);
    108 			(void) Sync();
    109 		}
    110 	}
    111 	sync_close(!hasdriver);
    112 	cleanupscreen();
    113 	exit(0);
    114 }
    115 
    116 void
    117 choke()
    118 {
    119 	leave(LEAVE_QUIT);
    120 }
    121 
    122 void
    123 child()
    124 {
    125 	union wait status;
    126 	int pid;
    127 
    128 	(void) signal(SIGCHLD, SIG_IGN);
    129 	do {
    130 		pid = wait3((int *)&status, WNOHANG, (struct rusage *)0);
    131 		if (pid < 0 || pid > 0 && !WIFSTOPPED(status))
    132 			hasdriver = 0;
    133 	} while (pid > 0);
    134 	(void) signal(SIGCHLD, child);
    135 }
    136