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srogue: prevent overflowing the score file name. If SCOREFILE is not defined, roguehome() is called to find a directory for the score file. It copies up to PATH_MAX-20 bytes from an environment variable to a static buffer. Later these are strcpy()'d to scorefile, which is of size LINLEN. Unfortunately LINLEN is 80 and PATH_MAX is at least 256. On Linux, it happens to be 4096. I haven't yet managed to crash or exploit it, but there are surely no beneficial consequences, so roguehome() has been modified to check the length, and the string it returns is also checked in main().
author John "Elwin" Edwards
date Sun, 02 Aug 2015 12:14:47 -0400
parents 44a0fce4b168
children 4b1999ac91cf
line wrap: on
line source

/*
 * mach_dep.h  -  machine dependicies
 *
 * Advanced Rogue
 * Copyright (C) 1984, 1985, 1986 Michael Morgan, Ken Dalka and AT&T
 * All rights reserved.
 *
 * Based on "Rogue: Exploring the Dungeons of Doom"
 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
 * All rights reserved.
 *
 * See the file LICENSE.TXT for full copyright and licensing information.
 */

/* Set these options, if not using config.h */
#ifndef HAVE_CONFIG_H
/*
 * define that the wizard commands exist
 */
#undef	WIZARD /* 0 */

/*
 * define if you want to limit scores to one per class per userid
 */
#undef LIMITSCORE /* 1 */

#endif

/* 
 * define that rogue should "nice()" itself
 */
#undef NICE	/* 1 */

#ifdef NICE
#define	FUDGE_TIME	70	/* fudge factor allowed in time for saved game*/
#else
#define	FUDGE_TIME	50	/* fudge factor allowed in time for saved game*/
#endif

#undef	DUMP		/* 1 */	/* dump core rather than catch the signal     */
#undef	NOCHECKACCESS	/* 1 */	/* If set, then don't check time on save file */


/*
 * where scorefile should live
 */
#ifndef HAVE_CONFIG_H
#define SCOREFILE	"arogue7.scr"
#define LOGFILE "arogue7.log"
#endif


/*
 * Variables for checking to make sure the system isn't too loaded
 * for people to play
 */

#if u370
#	define	MAXUSERS	40	/* max number of users for this game */
#	define	MAXPROCESSES	140	/* number processes including system */
					/* processes but not including gettys*/
#endif
#if uts
#	define	MAXUSERS	45	/* max number of users for this game */
#	define	MAXPROCESSES	150	/* number processes including system */
					/* processes but not including gettys*/
#endif
#if vax
#	define	MAXUSERS	17	/* max number of users for this game */
#	define	MAXPROCESSES	85	/* number processes including system */
					/* processes but not including gettys*/
#endif
#if u3b
#	define	MAXUSERS	14	/* max number of users for this game */
#	define	MAXPROCESSES	75	/* number processes including system */
					/* processes but not including gettys*/
#endif

#undef	MAXUSERS
#undef	MAXPROCESSES

#undef	CHECKTIME	/* 15 *//* number of minutes between load checks     */
				/* if not defined checks are only on startup */
#define UTMP	"/etc/utmp"	/* where utmp file lives */
/*
 * define the current author user id of the program for "special handling"
 */
#ifndef AUTHOR
#define AUTHOR 0
#endif