view arogue5/options.c @ 310:827441d05b3e

Advanced Rogue family: fix some potential buffer overflows. Some code for determining the score file location assumed that PATH_MAX would be less than 1024, which cannot be guaranteed. Advanced Rogue 5 and 7, and XRogue, have had the buffers for the file name enlarged. UltraRogue never called the functions, so the code has been deleted instead.
author John "Elwin" Edwards
date Mon, 03 May 2021 19:05:37 -0400
parents e52a8a7ad4c5
children
line wrap: on
line source

/*
 * This file has all the code for the option command.
 * I would rather this command were not necessary, but
 * it is the only way to keep the wolves off of my back.
 *
 * Advanced Rogue
 * Copyright (C) 1984, 1985 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.
 */

#include "curses.h"
#include <ctype.h>
#include <string.h>
#include <limits.h>
#include "rogue.h"

#define	NUM_OPTS	(sizeof optlist / sizeof (OPTION))


/*
 * description of an option and what to do with it
 */
struct optstruct {
    char	*o_name;	/* option name */
    char	*o_prompt;	/* prompt for interactive entry */
    void 	*o_opt;		/* pointer to thing to set */
    void	(*o_putfunc)();	/* function to print value */
    int		(*o_getfunc)();	/* function to get value interactively */
};

typedef struct optstruct	OPTION;

int get_ro(WINDOW *win, int oy, int ox);
int get_restr(char *optstr, WINDOW *win);
int get_score(char *optstr, WINDOW *win);
void put_abil(int *ability, WINDOW *win);
int get_abil(int *abil, WINDOW *win);
void put_quest(int *quest, WINDOW *win);
int get_quest(int *quest, WINDOW *win);
void put_bool(bool *b, WINDOW *win);
int get_bool(bool *bp, WINDOW *win);
void put_str(char *str, WINDOW *win);

OPTION	optlist[] = {
    {"terse",	 "Terse output: ",
		 (void *) &terse,	put_bool,	get_bool	},
    {"flush",	 "Flush typeahead during battle: ",
		 (void *) &fight_flush,	put_bool,	get_bool	},
    {"jump",	 "Show position only at end of run: ",
		 (void *) &jump,	put_bool,	get_bool	},
    {"step",	"Do inventories one line at a time: ",
		(void *) &slow_invent,	put_bool,	get_bool	},
    {"askme",	"Ask me about unidentified things: ",
		(void *) &askme,	put_bool,	get_bool	},
    {"pickup", "Pick things up automatically: ",
		(void *) &auto_pickup,	put_bool,	get_bool	},
    {"name",	 "Name: ",
		(void *) whoami,	put_str,	get_restr	},
    {"fruit",	 "Fruit: ",
		(void *) fruit,		put_str,	get_str		},
    {"file",	 "Save file: ",
		(void *) file_name,	put_str,	get_restr	},
    {"score",	 "Score file: ",
		(void *) score_file,	put_str,	get_score	},
    {"class",	"Character class: ",
		(void *)&char_type,	put_abil,	get_abil	},
    {"quest",	"Quest item: ",
		(void *) &quest_item,	put_quest,	get_quest	}
};

/* For fields that would be restricted if use_savedir is set. */
int get_restr(char *optstr, WINDOW *win)
{
    int oy, ox;

    if (use_savedir)
    {
        getyx(win, oy, ox);
        put_str(optstr, win);
        return get_ro(win, oy, ox);
    }
    else
        return get_str(optstr, win);
}

/* For the score file, which must be opened. */
int get_score(char *optstr, WINDOW *win)
{
    char old_score_file[PATH_MAX];
    int status;

    if (use_savedir)
        return get_restr(optstr, win);

    strcpy(old_score_file, optstr);
    status = get_str(optstr, win);
    if (status != NORM)
        return status;
    if (strcmp(old_score_file, optstr))
    {
        reopen_score();
    }
    return status;
}

/*
 * The ability field is read-only
 */
int
get_abil(int *abil, WINDOW *win)
{
    register int oy, ox;

    getyx(win, oy, ox);
    put_abil(abil, win);
    return get_ro(win, oy, ox);
}

/*
 * The quest field is read-only
 */
int
get_quest(int *quest, WINDOW *win)
{
    register int oy, ox;

    getyx(win, oy, ox);
    waddstr(win, rel_magic[*quest].mi_name);
    return get_ro(win, oy, ox);
}

/*
 * get_ro:
 *	"Get" a read-only value.
 */

int
get_ro(WINDOW *win, int oy, int ox)
{
    register int ny, nx;
    register bool op_bad;
    
    op_bad = TRUE;
    getyx(win, ny, nx);
    while(op_bad)	
    {
	wmove(win, oy, ox);
	draw(win);
	switch (wgetch(win))
	{
	    case '\n':
	    case '\r':
		op_bad = FALSE;
		break;
	    case '\033':
	    case '\007':
		return QUIT;
	    case '-':
		return MINUS;
	    default:
		mvwaddstr(win, ny, nx + 5, "(no change allowed)");
	}
    }
    wmove(win, ny, nx + 5);
    wclrtoeol(win);
    wmove(win, ny, nx);
    waddch(win, '\n');
    return NORM;
}

/*
 * allow changing a boolean option and print it out
 */

int
get_bool(bool *bp, WINDOW *win)
{
    register int oy, ox;
    register bool op_bad;

    op_bad = TRUE;
    getyx(win, oy, ox);
    waddstr(win, *bp ? "True" : "False");
    while(op_bad)	
    {
	wmove(win, oy, ox);
	draw(win);
	switch (wgetch(win))
	{
	    case 't':
	    case 'T':
		*bp = TRUE;
		op_bad = FALSE;
		break;
	    case 'f':
	    case 'F':
		*bp = FALSE;
		op_bad = FALSE;
		break;
	    case '\n':
	    case '\r':
		op_bad = FALSE;
		break;
	    case '\033':
	    case '\007':
		return QUIT;
	    case '-':
		return MINUS;
	    default:
		mvwaddstr(win, oy, ox + 10, "(T or F)");
	}
    }
    wmove(win, oy, ox);
    wclrtoeol(win);
    waddstr(win, *bp ? "True" : "False");
    waddch(win, '\n');
    return NORM;
}


/*
 * set a string option
 */
int
get_str(char *opt, WINDOW *win)
{
    register char *sp;
    register int c, oy, ox;
    char buf[LINELEN];

    draw(win);
    getyx(win, oy, ox);
    /*
     * loop reading in the string, and put it in a temporary buffer
     */
    for (sp = buf;
	(c = md_readchar(win)) != '\n'	&& 
	c != '\r'			&& 
	c != '\033'			&& 
	c != '\007'			&&
	sp < &buf[LINELEN-1];
	wclrtoeol(win), draw(win))
    {
	if (c == -1)
	    continue;
	else if (c == md_erasechar()) /* process erase character */
	{
	    if (sp > buf)
	    {
		register int i;

		sp--;
		for (i = strlen(unctrl(*sp)); i; i--)
		    waddch(win, '\b');
	    }
	    continue;
	}
	else if (c == md_killchar()) /* process kill character */
	{
	    sp = buf;
	    wmove(win, oy, ox);
	    continue;
	}
	else if (sp == buf)
	{
	    if (c == '-' && win == hw)	/* To move back a line in hw */
		break;
	    else if (c == '~')
	    {
		strcpy(buf, home);
		waddstr(win, home);
		sp += strlen(home);
		continue;
	    }
	}
	*sp++ = c;
	waddstr(win, unctrl(c));
    }
    *sp = '\0';
    if (sp > buf)	/* only change option if something has been typed */
	strucpy(opt, buf, strlen(buf));
    wmove(win, oy, ox);
    waddstr(win, opt);
    waddch(win, '\n');
    draw(win);
    if (win == cw)
	mpos += (int)(sp - buf);
    if (c == '-')
	return MINUS;
    else if (c == '\033' || c == '\007')
	return QUIT;
    else
	return NORM;
}



/*
 * print and then set options from the terminal
 */
void
option(void)
{
    register OPTION	*op;
    register int	retval;

    wclear(hw);
    touchwin(hw);
    /*
     * Display current values of options
     */
    for (op = optlist; op <= &optlist[NUM_OPTS-1]; op++)
    {
	waddstr(hw, op->o_prompt);
	(*op->o_putfunc)(op->o_opt, hw);
	waddch(hw, '\n');
    }
    /*
     * Set values
     */
    wmove(hw, 0, 0);
    for (op = optlist; op <= &optlist[NUM_OPTS-1]; op++)
    {
	waddstr(hw, op->o_prompt);
	if ((retval = (*op->o_getfunc)(op->o_opt, hw)))
	{
	    if (retval == QUIT)
		break;
	    else if (op > optlist) {	/* MINUS */
		wmove(hw, (int)(op - optlist) - 1, 0);
		op -= 2;
	    }
	    else	/* trying to back up beyond the top */
	    {
		putchar('\007');
		wmove(hw, 0, 0);
		op--;
	    }
	}
    }
    /*
     * Switch back to original screen
     */
    mvwaddstr(hw, LINES-1, 0, spacemsg);
    draw(hw);
    wait_for(hw,' ');
    clearok(cw, TRUE);
    touchwin(cw);
    after = FALSE;
}

/*
 * parse options from string, usually taken from the environment.
 * the string is a series of comma seperated values, with booleans
 * being stated as "name" (true) or "noname" (false), and strings
 * being "name=....", with the string being defined up to a comma
 * or the end of the entire option string.
 */

void
parse_opts(char *str)
{
    register char *sp;
    register OPTION *op;
    register int len;

    while (*str)
    {
	/*
	 * Get option name
	 */
	for (sp = str; isalpha(*sp); sp++)
	    continue;
	len = (int)(sp - str);
	/*
	 * Look it up and deal with it
	 */
	for (op = optlist; op <= &optlist[NUM_OPTS-1]; op++)
	{
            /* None of these can be changed if using system savefiles. */
            if (use_savedir && (!strcmp(op->o_name, "name") ||
                                !strcmp(op->o_name, "file") ||
                                !strcmp(op->o_name, "score") ))
                continue;
	    if (EQSTR(str, op->o_name, len))
	    {
		if (op->o_putfunc == put_bool)	/* if option is a boolean */
		    *(bool *)op->o_opt = TRUE;
		else				/* string option */
		{
		    register char *start;
		    char value[80];

		    /*
		     * Skip to start of string value
		     */
		    for (str = sp + 1; *str == '='; str++)
			continue;
		    if (*str == '~')
		    {
			strcpy((char *) value, home);
			start = (char *) value + strlen(home);
			while (*++str == '/')
			    continue;
		    }
		    else
			start = (char *) value;
		    /*
		     * Skip to end of string value
		     */
		    for (sp = str + 1; *sp && *sp != ','; sp++)
			continue;
		    strucpy(start, str, sp - str);

		    /* Put the value into the option field */
		    if (op->o_putfunc != put_abil) 
			strcpy((char *)op->o_opt, value);

		    else if (*(int *)op->o_opt == -1) {
			/* Only init ability once */
			register int len = strlen(value);

			if (isupper(value[0])) value[0] = tolower(value[0]);
			if (EQSTR(value, "fighter", len))
				*(int *)op->o_opt = C_FIGHTER;
			else if (EQSTR(value, "magic", min(len, 5)))
				*(int *)op->o_opt = C_MAGICIAN;
			else if (EQSTR(value, "cleric", len))
				*(int *)op->o_opt = C_CLERIC;
			else if (EQSTR(value, "thief", len))
				*(int *)op->o_opt = C_THIEF;
		    }
		}
		break;
	    }
	    /*
	     * check for "noname" for booleans
	     */
	    else if (op->o_putfunc == put_bool
	      && EQSTR(str, "no", 2) && EQSTR(str + 2, op->o_name, len - 2))
	    {
		*(bool *)op->o_opt = FALSE;
		break;
	    }
	}

	/*
	 * skip to start of next option name
	 */
	while (*sp && !isalpha(*sp))
	    sp++;
	str = sp;
    }
}


/*
 * print the character type
 */
void
put_abil(int *ability, WINDOW *win)
{
    char *abil;

    switch (*ability) {
	case C_MAGICIAN:abil = "Magic User";
	when C_FIGHTER:	abil = "Fighter";
	when C_CLERIC:	abil = "Cleric";
	when C_THIEF:	abil = "Thief";
	otherwise:	abil = "??";
    }
    waddstr(win, abil);
}


/*
 * print out the quest
 */

void
put_quest(int *quest, WINDOW *win)
{
    waddstr(win, rel_magic[*quest].mi_name);
}


/*
 * put out a boolean
 */
void
put_bool(bool *b, WINDOW *win)
{
    waddstr(win, *b ? "True" : "False");
}




/*
 * put out a string
 */
void
put_str(char *str, WINDOW *win)
{
    waddstr(win, str);
}