NetBSD/games/monop/monop.c
jsm 5367f3400c Security improvements for games (largely from or inspired by OpenBSD).
Games which run setgid from dm, but don't need to, should drop their
privileges at startup.

Games which have a scorefile should open it at startup, then drop all
privileges leaving just the open writable file descriptor.  If the
game can invoke subprocesses, this should be made close-on-exec.

Games with scorefiles should make sure they do not get a file
descriptor < 3.  (Otherwise, they could get confused and corrupt the
scorefile when using stdin, stdout or stderr.)

Some old setuid revokes from the days of setuid games change into gid
revokes.
1999-09-12 09:02:20 +00:00

204 lines
5.2 KiB
C

/* $NetBSD: monop.c,v 1.9 1999/09/12 09:02:22 jsm Exp $ */
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)monop.c 8.1 (Berkeley) 5/31/93";
#else
__RCSID("$NetBSD: monop.c,v 1.9 1999/09/12 09:02:22 jsm Exp $");
#endif
#endif /* not lint */
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include "monop.def"
int main __P((int, char *[]));
static void getplayers __P((void));
static void init_players __P((void));
static void init_monops __P((void));
static void do_quit __P((int));
/*
* This program implements a monopoly game
*/
int
main(ac, av)
int ac;
char *av[];
{
/* Revoke setgid privileges */
setregid(getgid(), getgid());
srand(getpid());
if (ac > 1) {
if (!rest_f(av[1]))
restore();
}
else {
getplayers();
init_players();
init_monops();
}
num_luck = sizeof lucky_mes / sizeof (char *);
init_decks();
signal(SIGINT, do_quit);
for (;;) {
printf("\n%s (%d) (cash $%d) on %s\n", cur_p->name, player + 1,
cur_p->money, board[cur_p->loc].name);
printturn();
force_morg();
execute(getinp("-- Command: ", comlist));
}
}
/*ARGSUSED*/
static void
do_quit(n)
int n __attribute__((__unused__));
{
quit();
}
/*
* This routine gets the names of the players
*/
static void
getplayers()
{
char *sp;
int i, j;
char buf[257];
blew_it:
for (;;) {
if ((num_play=get_int("How many players? ")) <= 0 ||
num_play > MAX_PL)
printf("Sorry. Number must range from 1 to 9\n");
else
break;
}
cur_p = play = (PLAY *) calloc(num_play, sizeof (PLAY));
if (play == NULL)
errx(1, "out of memory");
for (i = 0; i < num_play; i++) {
over:
printf("Player %d's name: ", i + 1);
for (sp = buf; (*sp=getchar()) != '\n'; sp++)
continue;
if (sp == buf)
goto over;
*sp++ = '\0';
name_list[i] = play[i].name = (char *)calloc(1, sp - buf);
if (name_list[i] == NULL)
errx(1, "out of memory");
strcpy(play[i].name, buf);
play[i].money = 1500;
}
name_list[i++] = "done";
name_list[i] = 0;
for (i = 0; i < num_play; i++)
for (j = i + 1; j < num_play; j++)
if (strcasecmp(name_list[i], name_list[j]) == 0) {
if (i != num_play - 1)
printf("Hey!!! Some of those are "
"IDENTICAL!! Let's try that "
"again....\n");
else
printf("\"done\" is a reserved word. "
"Please try again\n");
for (i = 0; i < num_play; i++)
free(play[i].name);
free(play);
goto blew_it;
}
}
/*
* This routine figures out who goes first
*/
static void
init_players()
{
int i, rl, cur_max;
bool over = 0;
int max_pl = 0;
again:
putchar('\n');
for (cur_max = i = 0; i < num_play; i++) {
printf("%s (%d) rolls %d\n", play[i].name, i+1, rl=roll(2, 6));
if (rl > cur_max) {
over = FALSE;
cur_max = rl;
max_pl = i;
}
else if (rl == cur_max)
over++;
}
if (over) {
printf("%d people rolled the same thing, so we'll try again\n",
over + 1);
goto again;
}
player = max_pl;
cur_p = &play[max_pl];
printf("%s (%d) goes first\n", cur_p->name, max_pl + 1);
}
/*
* This routine initalizes the monopoly structures.
*/
static void
init_monops()
{
MON *mp;
int i;
for (mp = mon; mp < &mon[N_MON]; mp++) {
mp->name = mp->not_m;
for (i = 0; i < mp->num_in; i++)
mp->sq[i] = &board[mp->sqnums[i]];
}
}