/*
 * $LynxId: LYReadCFG.c,v 1.189 2016/11/24 15:35:29 tom Exp $
 */
#ifndef NO_RULES
#include <HTRules.h>
#else
#include <HTUtils.h>
#endif
#include <HTTP.h>		/* 'reloading' flag */
#include <HTFile.h>
#include <HTInit.h>
#include <UCMap.h>

#include <LYUtils.h>
#include <GridText.h>
#include <LYStrings.h>
#include <LYStructs.h>
#include <LYGlobalDefs.h>
#include <LYCharSets.h>
#include <LYCharUtils.h>
#include <LYKeymap.h>
#include <LYJump.h>
#include <LYGetFile.h>
#include <LYCgi.h>
#include <LYCurses.h>
#include <LYBookmark.h>
#include <LYCookie.h>
#include <LYReadCFG.h>
#include <HTAlert.h>
#include <LYHistory.h>
#include <LYPrettySrc.h>
#include <LYrcFile.h>

#ifdef DIRED_SUPPORT
#include <LYLocal.h>
#endif /* DIRED_SUPPORT */

#include <LYexit.h>
#include <LYLeaks.h>

#ifndef DISABLE_NEWS
#include <HTNews.h>
#endif

BOOLEAN have_read_cfg = FALSE;
BOOLEAN LYUseNoviceLineTwo = TRUE;

/*
 * Translate a TRUE/FALSE field in a string buffer.
 */
static BOOL is_true(const char *string)
{
    if (!strcasecomp(string, "TRUE") || !strcasecomp(string, "ON"))
	return (TRUE);
    else
	return (FALSE);
}

/*
 * Find an unescaped colon in a string buffer.
 */
static const char *find_colon(const char *buffer)
{
    char ch;
    const char *buf = buffer;

    if (buf == NULL)
	return NULL;

    while ((ch = *buf) != 0) {
	if (ch == ':')
	    return buf;
	if (ch == '\\') {
	    buf++;
	    if (*buf == 0)
		break;
	}
	buf++;
    }
    return NULL;
}

static void free_item_list_item(lynx_list_item_type **list,
				lynx_list_item_type *ptr)
{
    lynx_list_item_type *prev;
    lynx_list_item_type *cur;

    for (cur = *list, prev = 0; cur != 0; prev = cur, cur = cur->next) {
	if (cur == ptr) {

	    if (prev != 0)
		prev->next = cur->next;
	    else
		*list = cur->next;

	    FREE(cur->name);
	    FREE(cur->menu_name);
	    FREE(cur->command);
	    FREE(cur);
	    break;
	}
    }
}

static void free_item_list(lynx_list_item_type **ptr)
{
    while (*ptr != 0) {
	free_item_list_item(ptr, *ptr);
    }
}

/*
 * Function for freeing the DOWNLOADER and UPLOADER menus list.  - FM
 */
static void free_all_item_lists(void)
{
    free_item_list(&printers);
    free_item_list(&downloaders);
#ifdef DIRED_SUPPORT
    free_item_list(&uploaders);
#endif /* DIRED_SUPPORT */

#ifdef USE_EXTERNALS
    free_item_list(&externals);
#endif /* USE_EXTERNALS */

    return;
}

static const char *parse_list_bool(BOOL *target, const char *source)
{
    const char *result;

    source = LYSkipCBlanks(source);
    result = find_colon(source);

    if (*source != '\0') {
	char temp[20];
	size_t len = ((result != 0)
		      ? (size_t) (result - source)
		      : strlen(source));

	if (len > sizeof(temp))
	    len = (sizeof(temp) - 1);
	LYStrNCpy(temp, source, len);
	*target = is_true(temp);
	CTRACE2(TRACE_CFG, (tfp, "parse_list_bool(%s) '%d'\n", source, *target));
    }
    return result;
}

static const char *parse_list_int(int *target, const char *source)
{
    const char *result;

    source = LYSkipCBlanks(source);
    result = find_colon(source);

    if (*source != '\0') {
	*target = atoi(source);
	CTRACE2(TRACE_CFG, (tfp, "parse_list_int(%s) '%d'\n", source, *target));
    }
    return result;
}

static const char *parse_list_string(char **target, const char *source)
{
    const char *result;

    source = LYSkipCBlanks(source);
    result = find_colon(source);

    if (*source != '\0') {
	const char *next = ((result == 0)
			    ? (source + strlen(source))
			    : result);

	*target = typecallocn(char, (size_t) (next - source + 1));

	if (*target == NULL)
	    outofmem(__FILE__, "read_cfg");
	LYStrNCpy(*target, source, (next - source));
	remove_backslashes(*target);

	CTRACE2(TRACE_CFG, (tfp, "parse_list_string(%s) '%s'\n", source, *target));
    }
    return result;
}

/*
 * Process string buffer fields for DOWNLOADER or UPLOADER
 *                               or PRINTERS   or EXTERNALS menus
 */
static void add_item_to_list(char *buffer,
			     lynx_list_item_type **list_ptr,
			     int special,
			     int menu_name)
{
    const char *colon, *last_colon;
    lynx_list_item_type *cur_item, *prev_item;

    /*
     * Check if the XWINDOWS or NON_XWINDOWS keyword is present in the last
     * field, and act properly when found depending if external environment
     * $DISPLAY variable is set.
     */
    if ((colon = find_colon(buffer)) == 0) {
	return;
    }
    for (last_colon = colon;
	 (colon = find_colon(last_colon + 1)) != 0;
	 last_colon = colon) {
	;
    }

    /*
     * If colon equals XWINDOWS then only continue
     * if there is a $DISPLAY variable
     */
    if (!strcasecomp(last_colon + 1, "XWINDOWS")) {
	if (LYgetXDisplay() == NULL)
	    return;
    }
    /*
     * If colon equals NON_XWINDOWS then only continue
     * if there is no $DISPLAY variable
     */
    else if (!strcasecomp(last_colon + 1, "NON_XWINDOWS")) {
	if (LYgetXDisplay() != NULL)
	    return;
    }

    /*
     * Make a linked list
     */
    if (*list_ptr == NULL) {
	/*
	 * First item.
	 */
	cur_item = typecalloc(lynx_list_item_type);

	if (cur_item == NULL)
	    outofmem(__FILE__, "read_cfg");

	*list_ptr = cur_item;
#ifdef LY_FIND_LEAKS
	atexit(free_all_item_lists);
#endif
    } else {
	/*
	 * Find the last item.
	 */
	for (prev_item = *list_ptr;
	     prev_item->next != NULL;
	     prev_item = prev_item->next) ;	/* null body */
	cur_item = typecalloc(lynx_list_item_type);

	if (cur_item == NULL)
	    outofmem(__FILE__, "read_cfg");
	else
	    prev_item->next = cur_item;
    }
    /* fill-in nonzero default values */
    cur_item->pagelen = 66;

    /*
     * Find first unescaped colon and process fields
     */
    if (find_colon(buffer) != NULL) {
	colon = parse_list_string(&(cur_item->name), buffer);

	if (colon && menu_name) {
	    colon = parse_list_string(&(cur_item->menu_name), colon + 1);
	}
	if (colon) {
	    colon = parse_list_string(&(cur_item->command), colon + 1);
	}
	if (colon) {
	    colon = parse_list_bool(&(cur_item->always_enabled), colon + 1);
	}
	if (colon) {
	    if (special) {
		(void) parse_list_int(&(cur_item->pagelen), colon + 1);
	    } else {
		(void) parse_list_bool(&(cur_item->override_action), colon + 1);
	    }
	}
    }

    /* ignore empty data */
    if (cur_item->name == NULL
	|| cur_item->command == NULL) {
	CTRACE2(TRACE_CFG, (tfp, "ignoring incomplete list_item '%s'\n", buffer));
	free_item_list_item(list_ptr, cur_item);
    } else if (cur_item->menu_name == NULL) {
	StrAllocCopy(cur_item->menu_name, cur_item->command);
    }
}

lynx_list_item_type *find_item_by_number(lynx_list_item_type *list_ptr,
					 char *number)
{
    int value = atoi(number);

    while (value-- >= 0 && list_ptr != 0) {
	list_ptr = list_ptr->next;
    }
    return list_ptr;
}

int match_item_by_name(lynx_list_item_type *ptr,
		       const char *name,
		       int only_overriders)
{
    return
	(ptr->command != 0
	 && !strncasecomp(ptr->name, name, (int) strlen(ptr->name))
	 && (only_overriders ? ptr->override_action : 1));
}

#if defined(USE_COLOR_STYLE) || defined(USE_COLOR_TABLE)

#ifndef COLOR_WHITE
#define COLOR_WHITE 7
#endif

#ifndef COLOR_BLACK
#define COLOR_BLACK 0
#endif

#ifdef USE_DEFAULT_COLORS
int default_fg = DEFAULT_COLOR;
int default_bg = DEFAULT_COLOR;

#else
int default_fg = COLOR_WHITE;
int default_bg = COLOR_BLACK;
#endif

static const char *Color_Strings[16] =
{
    "black",
    "red",
    "green",
    "brown",
    "blue",
    "magenta",
    "cyan",
    "lightgray",
    "gray",
    "brightred",
    "brightgreen",
    "yellow",
    "brightblue",
    "brightmagenta",
    "brightcyan",
    "white"
};

#if defined(PDCURSES) && !defined(XCURSES)
/*
 * PDCurses (and possibly some other implementations) use a non-ANSI set of
 * codes for colors.
 */
static int ColorCode(int color)
{
    /* *INDENT-OFF* */
    static int map[] =
    {
	0,  4,  2,  6,  1,  5,  3,  7,
	8, 12, 10, 14,  9, 13, 11, 15
    };
    /* *INDENT-ON* */

    return map[color];
}
#else
#define ColorCode(color) (color)
#endif

BOOL default_color_reset = FALSE;

/*
 * Validator for COLOR fields.
 */
int check_color(const char *color,
		int the_default)
{
    int i;

    CTRACE2(TRACE_STYLE, (tfp, "check_color(%s,%d)\n", color, the_default));
    if (!strcasecomp(color, "default")) {
#ifdef USE_DEFAULT_COLORS
	if (LYuse_default_colors && !default_color_reset)
	    the_default = DEFAULT_COLOR;
#endif /* USE_DEFAULT_COLORS */
	CTRACE2(TRACE_STYLE, (tfp, "=> default %d\n", the_default));
	return the_default;
    }
    if (!strcasecomp(color, "nocolor"))
	return NO_COLOR;

    for (i = 0; i < 16; i++) {
	if (!strcasecomp(color, Color_Strings[i])) {
	    int c = ColorCode(i);

	    CTRACE2(TRACE_STYLE, (tfp, "=> %d\n", c));
	    return c;
	}
    }
    CTRACE2(TRACE_STYLE, (tfp, "=> ERR_COLOR\n"));
    return ERR_COLOR;
}

const char *lookup_color(int code)
{
    unsigned n;

    for (n = 0; n < 16; n++) {
	if ((int) ColorCode(n) == code)
	    return Color_Strings[n];
    }
    return "default";
}
#endif /* USE_COLOR_STYLE || USE_COLOR_TABLE */

#if defined(USE_COLOR_TABLE) || defined(EXP_ASSUMED_COLOR)

/*
 * Exit routine for failed COLOR parsing.
 */
static void exit_with_color_syntax(char *error_line)
{
    unsigned int i;

    fprintf(stderr, gettext("\
Syntax Error parsing COLOR in configuration file:\n\
The line must be of the form:\n\
COLOR:INTEGER:FOREGROUND:BACKGROUND\n\
\n\
Here FOREGROUND and BACKGROUND must be one of:\n\
The special strings 'nocolor' or 'default', or\n")
	);
    for (i = 0; i < 16; i += 4) {
	fprintf(stderr, "%16s %16s %16s %16s\n",
		Color_Strings[i], Color_Strings[i + 1],
		Color_Strings[i + 2], Color_Strings[i + 3]);
    }
    fprintf(stderr, "%s\nCOLOR:%s\n", gettext("Offending line:"), error_line);
    exit_immediately(EXIT_FAILURE);
}
#endif /* defined(USE_COLOR_TABLE) || defined(EXP_ASSUMED_COLOR) */

#if defined(USE_COLOR_TABLE)
/*
 * Process string buffer fields for COLOR setting.
 */
static void parse_color(char *buffer)
{
    int color;
    const char *fg, *bg;
    char *temp_fg = 0;

    /*
     * We are expecting a line of the form:
     *    INTEGER:FOREGROUND:BACKGROUND
     */
    color = atoi(buffer);
    if (NULL == (fg = find_colon(buffer)))
	exit_with_color_syntax(buffer);

    if (NULL == (bg = find_colon(++fg)))
	exit_with_color_syntax(buffer);

    StrAllocCopy(temp_fg, fg);
    temp_fg[bg++ - fg] = '\0';

#if defined(USE_SLANG)
    if ((check_color(temp_fg, default_fg) == ERR_COLOR) ||
	(check_color(bg, default_bg) == ERR_COLOR))
	exit_with_color_syntax(buffer);

    SLtt_set_color(color, NULL, temp_fg, bg);
#else
    if (lynx_chg_color(color,
		       check_color(temp_fg, default_fg),
		       check_color(bg, default_bg)) < 0)
	exit_with_color_syntax(buffer);
#endif
    FREE(temp_fg);
}
#endif /* USE_COLOR_TABLE */
/* *INDENT-OFF* */
#ifdef USE_SOURCE_CACHE
static Config_Enum tbl_source_cache[] = {
    { "FILE",	SOURCE_CACHE_FILE },
    { "MEMORY",	SOURCE_CACHE_MEMORY },
    { "NONE",	SOURCE_CACHE_NONE },
    { NULL,		-1 },
};

static Config_Enum tbl_abort_source_cache[] = {
    { "KEEP",	SOURCE_CACHE_FOR_ABORTED_KEEP },
    { "DROP",	SOURCE_CACHE_FOR_ABORTED_DROP },
    { NULL,		-1 },
};
#endif
/* *INDENT-ON* */

#define PARSE_ADD(n,v)   {n, CONF_ADD_ITEM,    UNION_ADD(v), 0}
#define PARSE_SET(n,v)   {n, CONF_BOOL,        UNION_SET(v), 0}
#define PARSE_ENU(n,v,t) {n, CONF_ENUM,        UNION_INT(v), t}
#define PARSE_INT(n,v)   {n, CONF_INT,         UNION_INT(v), 0}
#define PARSE_TIM(n,v)   {n, CONF_TIME,        UNION_INT(v), 0}
#define PARSE_STR(n,v)   {n, CONF_STR,         UNION_STR(v), 0}
#define PARSE_PRG(n,v)   {n, CONF_PRG,         UNION_DEF(v), 0}
#define PARSE_Env(n,v)   {n, CONF_ENV,         UNION_ENV(v), 0}
#define PARSE_ENV(n,v)   {n, CONF_ENV2,        UNION_ENV(v), 0}
#define PARSE_FUN(n,v)   {n, CONF_FUN,         UNION_FUN(v), 0}
#define PARSE_REQ(n,v)   {n, CONF_INCLUDE,     UNION_FUN(v), 0}
#define PARSE_LST(n,v)   {n, CONF_ADD_STRING,  UNION_LST(v), 0}
#define PARSE_DEF(n,v)   {n, CONF_ADD_TRUSTED, UNION_DEF(v), 0}
#define PARSE_NIL        {NULL, CONF_NIL,      UNION_DEF(0), 0}

typedef enum {
    CONF_NIL = 0
    ,CONF_BOOL			/* BOOLEAN type */
    ,CONF_FUN
    ,CONF_TIME
    ,CONF_ENUM
    ,CONF_INT
    ,CONF_STR
    ,CONF_PRG
    ,CONF_ENV			/* from environment variable */
    ,CONF_ENV2			/* from environment VARIABLE */
    ,CONF_INCLUDE		/* include file-- handle special */
    ,CONF_ADD_ITEM
    ,CONF_ADD_STRING
    ,CONF_ADD_TRUSTED
} Conf_Types;

typedef struct {
    const char *name;
    Conf_Types type;
      ParseData;
    Config_Enum *table;
} Config_Type;

static int assume_charset_fun(char *value)
{
    assumed_charset = TRUE;
    UCLYhndl_for_unspec = safeUCGetLYhndl_byMIME(value);
    StrAllocCopy(UCAssume_MIMEcharset,
		 LYCharSet_UC[UCLYhndl_for_unspec].MIMEname);
    CTRACE((tfp, "assume_charset_fun %s ->%d ->%s\n",
	    NonNull(value),
	    UCLYhndl_for_unspec,
	    UCAssume_MIMEcharset));
    return 0;
}

static int assume_local_charset_fun(char *value)
{
    UCLYhndl_HTFile_for_unspec = safeUCGetLYhndl_byMIME(value);
    return 0;
}

static int assume_unrec_charset_fun(char *value)
{
    UCLYhndl_for_unrec = safeUCGetLYhndl_byMIME(value);
    return 0;
}

static int character_set_fun(char *value)
{
    int i = UCGetLYhndl_byAnyName(value);	/* by MIME or full name */

    if (i < 0) {
#ifdef CAN_AUTODETECT_DISPLAY_CHARSET
	if (auto_display_charset >= 0
	    && (!strncasecomp(value, "AutoDetect ", 11)
		|| !strncasecomp(value, "AutoDetect-2 ", 13)))
	    current_char_set = auto_display_charset;
#endif
	/* do nothing here: so fallback to userdefs.h */
    } else {
	current_char_set = i;
    }

    return 0;
}

static int outgoing_mail_charset_fun(char *value)
{
    outgoing_mail_charset = UCGetLYhndl_byMIME(value);
    /* -1 if NULL or not recognized value: no translation (compatibility) */

    return 0;
}

#ifdef EXP_ASSUMED_COLOR
/*
 * Process string buffer fields for ASSUMED_COLOR setting.
 */
static int assumed_color_fun(char *buffer)
{
    const char *fg = buffer, *bg;
    char *temp_fg = 0;

    if (LYuse_default_colors) {

	/*
	 * We are expecting a line of the form:
	 *    FOREGROUND:BACKGROUND
	 */
	if (NULL == (bg = find_colon(fg)))
	    exit_with_color_syntax(buffer);

	StrAllocCopy(temp_fg, fg);
	temp_fg[bg++ - fg] = '\0';

	default_fg = check_color(temp_fg, default_fg);
	default_bg = check_color(bg, default_bg);

	if (default_fg == ERR_COLOR
	    || default_bg == ERR_COLOR)
	    exit_with_color_syntax(buffer);
	FREE(temp_fg);
    } else {
	CTRACE((tfp, "...ignored since DEFAULT_COLORS:off\n"));
    }
    return 0;
}
#endif /* EXP_ASSUMED_COLOR */

#ifdef USE_COLOR_TABLE
static int color_fun(char *value)
{
    parse_color(value);
    return 0;
}
#endif

#ifdef USE_COLOR_STYLE
static int lynx_lss_file_fun(char *value)
{
    CTRACE((tfp, "lynx_lss_file_fun '%s'\n", NonNull(value)));
    if (isEmpty(value)) {
	clear_lss_list();
    } else {
	add_to_lss_list(value, NULL);
    }
    return 0;
}
#endif

#ifdef USE_DEFAULT_COLORS
void update_default_colors(void)
{
    int old_fg = default_fg;
    int old_bg = default_bg;

    default_color_reset = !LYuse_default_colors;
    if (LYuse_default_colors) {
	default_color_reset = FALSE;
	default_fg = DEFAULT_COLOR;
	default_bg = DEFAULT_COLOR;
    } else {
	default_color_reset = TRUE;
	default_fg = COLOR_WHITE;
	default_bg = COLOR_BLACK;
    }
    if (old_fg != default_fg || old_bg != default_bg) {
	lynx_setup_colors();
#ifdef USE_COLOR_STYLE
	update_color_style();
#endif
    }
}

static int default_colors_fun(char *value)
{
    LYuse_default_colors = is_true(value);
    update_default_colors();
    return 0;
}
#endif

static int default_bookmark_file_fun(char *value)
{
    set_default_bookmark_page(value);
    return 0;
}

static int default_cache_size_fun(char *value)
{
    HTCacheSize = atoi(value);
    if (HTCacheSize < 2)
	HTCacheSize = 2;
    return 0;
}

static int default_editor_fun(char *value)
{
    if (!system_editor)
	StrAllocCopy(editor, value);
    return 0;
}

static int numbers_as_arrows_fun(char *value)
{
    if (is_true(value))
	keypad_mode = NUMBERS_AS_ARROWS;
    else
	keypad_mode = LINKS_ARE_NUMBERED;

    return 0;
}

#ifdef DIRED_SUPPORT
static int dired_menu_fun(char *value)
{
    add_menu_item(value);
    return 0;
}
#endif

static int jumpfile_fun(char *value)
{
    char *buffer = NULL;

    HTSprintf0(&buffer, "JUMPFILE:%s", value);
    if (!LYJumpInit(buffer))
	CTRACE((tfp, "Failed to register %s\n", buffer));
    FREE(buffer);

    return 0;
}

#ifdef EXP_KEYBOARD_LAYOUT
static int keyboard_layout_fun(char *key)
{
    if (!LYSetKbLayout(key))
	CTRACE((tfp, "Failed to set keyboard layout %s\n", key));
    return 0;
}
#endif /* EXP_KEYBOARD_LAYOUT */

static int keymap_fun(char *key)
{
    char *func, *efunc;

    if ((func = StrChr(key, ':')) != NULL) {
	*func++ = '\0';
	efunc = StrChr(func, ':');
	/* Allow comments on the ends of key remapping lines. - DT */
	/* Allow third field for line-editor action. - kw */
	if (efunc == func) {	/* have 3rd field, but 2nd field empty */
	    func = NULL;
	} else if (efunc && strncasecomp(efunc + 1, "DIRED", 5) == 0) {
	    if (!remap(key, strtok(func, " \t\n:#"), TRUE)) {
		fprintf(stderr,
			gettext("key remapping of %s to %s for %s failed\n"),
			key, func, efunc + 1);
	    } else if (!strcmp("TOGGLE_HELP", func)) {
		LYUseNoviceLineTwo = FALSE;
	    }
	    return 0;
	} else if (!remap(key, strtok(func, " \t\n:#"), FALSE)) {
	    fprintf(stderr, gettext("key remapping of %s to %s failed\n"),
		    key, func);
	} else {
	    if (!strcmp("TOGGLE_HELP", func))
		LYUseNoviceLineTwo = FALSE;
	}
	if (efunc) {
	    efunc++;
	    if (efunc == strtok((func ? NULL : efunc), " \t\n:#") && *efunc) {
		BOOLEAN success = FALSE;
		int lkc = lkcstring_to_lkc(key);
		int lec = -1;
		int select_edi = 0;
		char *sselect_edi = strtok(NULL, " \t\n:#");
		char **endp = &sselect_edi;

		if (sselect_edi) {
		    if (*sselect_edi)
			select_edi = (int) strtol(sselect_edi, endp, 10);
		    if (**endp != '\0') {
			fprintf(stderr,
				gettext("invalid line-editor selection %s for key %s, selecting all\n"),
				sselect_edi, key);
			select_edi = 0;
		    }
		}
		/*
		 * PASS!  tries to enter the key into the LYLineEditors
		 * bindings in a different way from PASS, namely as binding
		 * that maps to the specific lynx actioncode (rather than to
		 * LYE_FORM_PASS).  That only works for lynx keycodes with
		 * modifier bit set, and we have no documented/official way to
		 * specify this in the KEYMAP directive, although it can be
		 * made to work e.g. by specifying a hex value that has the
		 * modifier bit set.  But knowledge about the bit pattern of
		 * modifiers should remain in internal matter subject to
		 * change...  At any rate, if PASS!  fails try it the same way
		 * as for PASS.  - kw
		 */
		if (!success && strcasecomp(efunc, "PASS!") == 0) {
		    if (func) {
			lec = LYE_FORM_LAC | lacname_to_lac(func);
			success = (BOOL) LYRemapEditBinding(lkc, lec, select_edi);
		    }
		    if (!success)
			fprintf(stderr,
				gettext("setting of line-editor binding for key %s (0x%x) to 0x%x for %s failed\n"),
				key, lkc, lec, efunc);
		    else
			return 0;
		}
		if (!success) {
		    lec = lecname_to_lec(efunc);
		    success = (BOOL) LYRemapEditBinding(lkc, lec, select_edi);
		}
		if (!success) {
		    if (lec != -1) {
			fprintf(stderr,
				gettext("setting of line-editor binding for key %s (0x%x) to 0x%x for %s failed\n"),
				key, lkc, lec, efunc);
		    } else {
			fprintf(stderr,
				gettext("setting of line-editor binding for key %s (0x%x) for %s failed\n"),
				key, lkc, efunc);
		    }
		}
	    }
	}
    }
    return 0;
}

static int localhost_alias_fun(char *value)
{
    LYAddLocalhostAlias(value);
    return 0;
}

#ifdef LYNXCGI_LINKS
static int lynxcgi_environment_fun(char *value)
{
    add_lynxcgi_environment(value);
    return 0;
}
#endif

static int lynx_sig_file_fun(char *value)
{
    char temp[LY_MAXPATH];

    LYStrNCpy(temp, value, sizeof(temp) - 1);
    if (LYPathOffHomeOK(temp, sizeof(temp))) {
	StrAllocCopy(LynxSigFile, temp);
	LYAddPathToHome(temp, sizeof(temp), LynxSigFile);
	StrAllocCopy(LynxSigFile, temp);
	CTRACE((tfp, "LYNX_SIG_FILE set to '%s'\n", LynxSigFile));
    } else {
	CTRACE((tfp, "LYNX_SIG_FILE '%s' is bad. Ignoring.\n", LYNX_SIG_FILE));
    }
    return 0;
}

#ifndef DISABLE_NEWS
static int news_chunk_size_fun(char *value)
{
    HTNewsChunkSize = atoi(value);
    /*
     * If the new HTNewsChunkSize exceeds the maximum,
     * increase HTNewsMaxChunk to this size. - FM
     */
    if (HTNewsChunkSize > HTNewsMaxChunk)
	HTNewsMaxChunk = HTNewsChunkSize;
    return 0;
}

static int news_max_chunk_fun(char *value)
{
    HTNewsMaxChunk = atoi(value);
    /*
     * If HTNewsChunkSize exceeds the new maximum,
     * reduce HTNewsChunkSize to this maximum. - FM
     */
    if (HTNewsChunkSize > HTNewsMaxChunk)
	HTNewsChunkSize = HTNewsMaxChunk;
    return 0;
}

static int news_posting_fun(char *value)
{
    LYNewsPosting = is_true(value);
    no_newspost = (BOOL) (LYNewsPosting == FALSE);
    return 0;
}
#endif /* DISABLE_NEWS */

#ifndef NO_RULES
static int cern_rulesfile_fun(char *value)
{
    char *rulesfile1 = NULL;
    char *rulesfile2 = NULL;

    if (HTLoadRules(value) >= 0) {
	return 0;
    }
    StrAllocCopy(rulesfile1, value);
    LYTrimLeading(value);
    LYTrimTrailing(value);

    StrAllocCopy(rulesfile2, value);
    LYTildeExpand(&rulesfile2, FALSE);

    if (strcmp(rulesfile1, rulesfile2) &&
	HTLoadRules(rulesfile2) >= 0) {
	FREE(rulesfile1);
	FREE(rulesfile2);
	return 0;
    }
    fprintf(stderr,
	    gettext("Lynx: cannot start, CERN rules file %s is not available\n"),
	    non_empty(rulesfile2) ? rulesfile2 : gettext("(no name)"));
    exit_immediately(EXIT_FAILURE);
    return 0;			/* though redundant, for compiler-warnings */
}
#endif /* NO_RULES */

static int referer_with_query_fun(char *value)
{
    if (!strncasecomp(value, "SEND", 4))
	LYRefererWithQuery = 'S';
    else if (!strncasecomp(value, "PARTIAL", 7))
	LYRefererWithQuery = 'P';
    else
	LYRefererWithQuery = 'D';
    return 0;
}

static int status_buffer_size_fun(char *value)
{
    status_buf_size = atoi(value);
    if (status_buf_size < 2)
	status_buf_size = 2;
    return 0;
}

static int startfile_fun(char *value)
{
    StrAllocCopy(startfile, value);

#ifdef USE_PROGRAM_DIR
    if (is_url(startfile) == 0) {
	char *tmp = NULL;

	HTSprintf0(&tmp, "%s\\%s", program_dir, startfile);
	FREE(startfile);
	LYLocalFileToURL(&startfile, tmp);
	FREE(tmp);
    }
#endif
    return 0;
}

static int suffix_fun(char *value)
{
    char *mime_type, *p, *parsed;
    const char *encoding = NULL;
    char *sq = NULL;
    char *description = NULL;
    double q = 1.0;

    if ((strlen(value) < 3)
	|| (NULL == (mime_type = StrChr(value, ':')))) {
	CTRACE((tfp, "Invalid SUFFIX:%s ignored.\n", value));
	return 0;
    }

    *mime_type++ = '\0';
    if (*mime_type) {
	if ((parsed = StrChr(mime_type, ':')) != NULL) {
	    *parsed++ = '\0';
	    if ((sq = StrChr(parsed, ':')) != NULL) {
		*sq++ = '\0';
		if ((description = StrChr(sq, ':')) != NULL) {
		    *description++ = '\0';
		    if ((p = StrChr(sq, ':')) != NULL)
			*p = '\0';
		    LYTrimTail(description);
		}
		LYRemoveBlanks(sq);
		if (!*sq)
		    sq = NULL;
	    }
	    LYRemoveBlanks(parsed);
	    LYLowerCase(parsed);
	    if (!*parsed)
		parsed = NULL;
	}
	encoding = parsed;
    }

    LYRemoveBlanks(mime_type);
    /*
     * mime-type is not converted to lowercase on input, to make it possible to
     * reproduce the equivalent of some of the HTInit.c defaults that use mixed
     * case, although that is not recomended.  - kw
     */
    if (!*mime_type) {		/* that's ok now, with an encoding!  */
	CTRACE((tfp, "SUFFIX:%s without MIME type for %s\n", value,
		encoding ? encoding : "what?"));
	mime_type = NULL;	/* that's ok now, with an encoding!  */
	if (!encoding)
	    return 0;
    }

    if (!encoding) {
	if (strstr(mime_type, "tex") != NULL ||
	    strstr(mime_type, "postscript") != NULL ||
	    strstr(mime_type, "sh") != NULL ||
	    strstr(mime_type, "troff") != NULL ||
	    strstr(mime_type, "rtf") != NULL)
	    encoding = "8bit";
	else
	    encoding = "binary";
    }
    if (!sq) {
	q = 1.0;
    } else {
	double df = strtod(sq, &p);

	if (p == sq && df <= 0.0) {
	    CTRACE((tfp, "Invalid q=%s for SUFFIX:%s, using -1.0\n",
		    sq, value));
	    q = -1.0;
	} else {
	    q = df;
	}
    }
    HTSetSuffix5(value, mime_type, encoding, description, q);

    return 0;
}

static int suffix_order_fun(char *value)
{
    char *p = value;
    char *optn;
    BOOLEAN want_file_init_now = FALSE;

    LYUseBuiltinSuffixes = TRUE;
    while ((optn = HTNextTok(&p, ", ", "", NULL)) != NULL) {
	if (!strcasecomp(optn, "NO_BUILTIN")) {
	    LYUseBuiltinSuffixes = FALSE;
	} else if (!strcasecomp(optn, "PRECEDENCE_HERE")) {
	    want_file_init_now = TRUE;
	} else if (!strcasecomp(optn, "PRECEDENCE_OTHER")) {
	    want_file_init_now = FALSE;
	} else {
	    CTRACE((tfp, "Invalid SUFFIX_ORDER:%s\n", optn));
	    break;
	}
    }

    if (want_file_init_now && !FileInitAlreadyDone) {
	HTFileInit();
	FileInitAlreadyDone = TRUE;
    }
    return 0;
}

static int system_editor_fun(char *value)
{
    StrAllocCopy(editor, value);
    system_editor = TRUE;
    return 0;
}

#define SetViewer(mime_type, viewer) \
    HTSetPresentation(mime_type, viewer, 0, 1.0, 3.0, 0.0, 0L, mediaCFG)

static int viewer_fun(char *value)
{
    char *mime_type;
    char *viewer;
    char *environment;

    mime_type = value;

    if ((strlen(value) < 3)
	|| (NULL == (viewer = StrChr(mime_type, ':'))))
	return 0;

    *viewer++ = '\0';

    LYRemoveBlanks(mime_type);
    LYLowerCase(mime_type);

    environment = strrchr(viewer, ':');
    if ((environment != NULL) &&
	(strlen(viewer) > 1) && *(environment - 1) != '\\') {
	*environment++ = '\0';
	remove_backslashes(viewer);
	/*
	 * If environment equals xwindows then only assign the presentation if
	 * there is a $DISPLAY variable.
	 */
	if (!strcasecomp(environment, "XWINDOWS")) {
	    if (LYgetXDisplay() != NULL)
		SetViewer(mime_type, viewer);
	} else if (!strcasecomp(environment, "NON_XWINDOWS")) {
	    if (LYgetXDisplay() == NULL)
		SetViewer(mime_type, viewer);
	} else {
	    SetViewer(mime_type, viewer);
	}
    } else {
	remove_backslashes(viewer);
	SetViewer(mime_type, viewer);
    }

    return 0;
}

static int nonrest_sigwinch_fun(char *value)
{
    if (!strncasecomp(value, "XWINDOWS", 8)) {
	LYNonRestartingSIGWINCH = (BOOL) (LYgetXDisplay() != NULL);
    } else {
	LYNonRestartingSIGWINCH = is_true(value);
    }
    return 0;
}

#ifdef USE_CHARSET_CHOICE
static void matched_charset_choice(int display_charset,
				   int i)
{
    int j;

    if (display_charset && !custom_display_charset) {
	for (custom_display_charset = TRUE, j = 0; j < LYNumCharsets; ++j)
	    charset_subsets[j].hide_display = TRUE;
    } else if (!display_charset && !custom_assumed_doc_charset) {
	for (custom_assumed_doc_charset = TRUE, j = 0; j < LYNumCharsets; ++j)
	    charset_subsets[j].hide_assumed = TRUE;
    }
    if (display_charset)
	charset_subsets[i].hide_display = FALSE;
    else
	charset_subsets[i].hide_assumed = FALSE;
}

static int parse_charset_choice(char *p,
				int display_charset)	/*if FALSE, then assumed doc charset */
{
    int len, i;
    int matches = 0;

    /*only one charset choice is allowed per line! */
    LYTrimHead(p);
    LYTrimTail(p);
    CTRACE((tfp, "parsing charset choice for %s:\"%s\"",
	    (display_charset ? "display charset" : "assumed doc charset"), p));
    len = (int) strlen(p);
    if (!len) {
	CTRACE((tfp, " - EMPTY STRING\n"));
	return 1;
    }
    if (*p == '*' && len == 1) {
	if (display_charset)
	    for (custom_display_charset = TRUE, i = 0; i < LYNumCharsets; ++i)
		charset_subsets[i].hide_display = FALSE;
	else
	    for (custom_assumed_doc_charset = TRUE, i = 0; i < LYNumCharsets; ++i)
		charset_subsets[i].hide_assumed = FALSE;
	CTRACE((tfp, " - all unhidden\n"));
	return 0;
    }
    if (p[len - 1] == '*') {
	--len;
	for (i = 0; i < LYNumCharsets; ++i) {
	    if ((!strncasecomp(p, LYchar_set_names[i], len)) ||
		(!strncasecomp(p, LYCharSet_UC[i].MIMEname, len))) {
		++matches;
		matched_charset_choice(display_charset, i);
	    }
	}
	CTRACE((tfp, " - %d matches\n", matches));
	return 0;
    } else {
	for (i = 0; i < LYNumCharsets; ++i) {
	    if ((!strcasecomp(p, LYchar_set_names[i])) ||
		(!strcasecomp(p, LYCharSet_UC[i].MIMEname))) {
		matched_charset_choice(display_charset, i);
		++matches;
		CTRACE((tfp, " - OK, %d matches\n", matches));
		return 0;
	    }
	}
	CTRACE((tfp, " - NOT recognised\n"));
	return 1;
    }
}

static int parse_display_charset_choice(char *p)
{
    return parse_charset_choice(p, 1);
}

static int parse_assumed_doc_charset_choice(char *p)
{
    return parse_charset_choice(p, 0);
}

#endif /* USE_CHARSET_CHOICE */

#ifdef USE_EXTERNALS
/*
 * EXTERNAL and EXTERNAL_MENU share the same list.  EXTERNAL_MENU allows
 * setting a different name than the command string.
 */
static int external_fun(char *str)
{
    add_item_to_list(str, &externals, FALSE, TRUE);
    return 0;
}
#endif

#ifdef USE_PRETTYSRC
static void html_src_bad_syntax(char *value,
				char *option_name)
{
    char *buf = 0;

    HTSprintf0(&buf, "HTMLSRC_%s", option_name);
    LYUpperCase(buf);
    fprintf(stderr, "Bad syntax in TAGSPEC %s:%s\n", buf, value);
    exit_immediately(EXIT_FAILURE);
}

static int parse_html_src_spec(HTlexeme lexeme_code, char *value,
			       char *option_name)
{
    /* Now checking the value for being correct.  Since HTML_dtd is not
     * initialized completely (member tags points to non-initiailized data), we
     * use tags_old.  If the syntax is incorrect, then lynx will exit with error
     * message.
     */
    char *ts2;

    if (isEmpty(value))
	return 0;		/* silently ignoring */

#define BS() html_src_bad_syntax(value,option_name)

    ts2 = StrChr(value, ':');
    if (!ts2)
	BS();

    *ts2 = '\0';

    CTRACE2(TRACE_CFG, (tfp,
			"LYReadCFG - parsing tagspec '%s:%s' for option '%s'\n",
			value, ts2, option_name));
    html_src_clean_item(lexeme_code);
    if (!html_src_parse_tagspec(value, lexeme_code, TRUE, TRUE)
	|| !html_src_parse_tagspec(ts2, lexeme_code, TRUE, TRUE)) {
	*ts2 = ':';
	BS();
    }

    *ts2 = ':';
    StrAllocCopy(HTL_tagspecs[lexeme_code], value);
#undef BS
    return 0;
}

static int psrcspec_fun(char *s)
{
    char *e;
    /* *INDENT-OFF* */
    static Config_Enum lexemnames[] =
    {
	{ "comm",	HTL_comm	},
	{ "tag",	HTL_tag		},
	{ "attrib",	HTL_attrib	},
	{ "attrval",	HTL_attrval	},
	{ "abracket",	HTL_abracket	},
	{ "entity",	HTL_entity	},
	{ "href",	HTL_href	},
	{ "entire",	HTL_entire	},
	{ "badseq",	HTL_badseq	},
	{ "badtag",	HTL_badtag	},
	{ "badattr",	HTL_badattr	},
	{ "sgmlspecial", HTL_sgmlspecial },
	{ NULL,		-1		}
    };
    /* *INDENT-ON* */

    int found;

    e = StrChr(s, ':');
    if (!e) {
	CTRACE((tfp,
		"bad format of PRETTYSRC_SPEC setting value, ignored %s\n",
		s));
	return 0;
    }
    *e = '\0';
    if (!LYgetEnum(lexemnames, s, &found)) {
	CTRACE((tfp,
		"bad format of PRETTYSRC_SPEC setting value, ignored %s:%s\n",
		s, e + 1));
	return 0;
    }
    parse_html_src_spec((HTlexeme) found, e + 1, s);
    return 0;
}

static int read_htmlsrc_attrname_xform(char *str)
{
    int val;

    if (1 == sscanf(str, "%d", &val)) {
	if (val < 0 || val > 2) {
	    CTRACE((tfp,
		    "bad value for htmlsrc_attrname_xform (ignored - must be one of 0,1,2): %d\n",
		    val));
	} else
	    attrname_transform = val;
    } else {
	CTRACE((tfp, "bad value for htmlsrc_attrname_xform (ignored): %s\n",
		str));
    }
    return 0;
}

static int read_htmlsrc_tagname_xform(char *str)
{
    int val;

    if (1 == sscanf(str, "%d", &val)) {
	if (val < 0 || val > 2) {
	    CTRACE((tfp,
		    "bad value for htmlsrc_tagname_xform (ignored - must be one of 0,1,2): %d\n",
		    val));
	} else
	    tagname_transform = val;
    } else {
	CTRACE((tfp, "bad value for htmlsrc_tagname_xform (ignored): %s\n",
		str));
    }
    return 0;
}
#endif

#ifdef USE_SESSIONS
static int session_limit_fun(char *value)
{
    session_limit = (short) atoi(value);
    if (session_limit < 1)
	session_limit = 1;
    else if (session_limit > MAX_SESSIONS)
	session_limit = MAX_SESSIONS;
    return 0;
}
#endif /* USE_SESSIONS */

#if defined(PDCURSES) && defined(PDC_BUILD) && PDC_BUILD >= 2401
static int screen_size_fun(char *value)
{
    char *cp;

    if ((cp = StrChr(value, ',')) != 0) {
	*cp++ = '\0';		/* Terminate ID */
	scrsize_x = atoi(value);
	scrsize_y = atoi(cp);
	if ((scrsize_x <= 1) || (scrsize_y <= 1)) {
	    scrsize_x = scrsize_y = 0;
	}
	if ((scrsize_x > 0) && (scrsize_x < 80)) {
	    scrsize_x = 80;
	}
	if ((scrsize_y > 0) && (scrsize_y < 4)) {
	    scrsize_y = 4;
	}
	CTRACE((tfp, "scrsize: x=%d, y=%d\n", scrsize_x, scrsize_y));
    }
    return 0;
}
#endif

#if defined(HAVE_LIBINTL_H) || defined(HAVE_LIBGETTEXT_H)
static int message_language_fun(char *value)
{
    char *tmp = NULL;

    HTSprintf0(&tmp, "LANG=%s", value);
    putenv(tmp);

    LYSetTextDomain();

    return 0;
}
#endif

/* This table is searched ignoring case */
/* *INDENT-OFF* */
static Config_Type Config_Table [] =
{
     PARSE_SET(RC_ACCEPT_ALL_COOKIES,   LYAcceptAllCookies),
     PARSE_TIM(RC_ALERTSECS,            AlertSecs),
#if USE_BLAT_MAILER
     PARSE_SET(RC_ALT_BLAT_MAIL,        mail_is_altblat),
#endif
     PARSE_SET(RC_ALWAYS_RESUBMIT_POSTS, LYresubmit_posts),
#ifdef EXEC_LINKS
     PARSE_DEF(RC_ALWAYS_TRUSTED_EXEC,  ALWAYS_EXEC_PATH),
#endif
     PARSE_FUN(RC_ASSUME_CHARSET,       assume_charset_fun),
     PARSE_FUN(RC_ASSUME_LOCAL_CHARSET, assume_local_charset_fun),
     PARSE_FUN(RC_ASSUME_UNREC_CHARSET, assume_unrec_charset_fun),
#ifdef EXP_ASSUMED_COLOR
     PARSE_FUN(RC_ASSUMED_COLOR,        assumed_color_fun),
#endif
#ifdef USE_CHARSET_CHOICE
     PARSE_FUN(RC_ASSUMED_DOC_CHARSET_CHOICE, parse_assumed_doc_charset_choice),
#endif
#ifdef DIRED_SUPPORT
     PARSE_INT(RC_AUTO_UNCACHE_DIRLISTS, LYAutoUncacheDirLists),
#endif
#ifndef DISABLE_BIBP
     PARSE_STR(RC_BIBP_BIBHOST,         BibP_bibhost),
     PARSE_STR(RC_BIBP_GLOBALSERVER,    BibP_globalserver),
#endif
#if USE_BLAT_MAILER
     PARSE_SET(RC_BLAT_MAIL,            mail_is_blat),
#endif
     PARSE_SET(RC_BLOCK_MULTI_BOOKMARKS, LYMBMBlocked),
     PARSE_SET(RC_BOLD_H1,              bold_H1),
     PARSE_SET(RC_BOLD_HEADERS,         bold_headers),
     PARSE_SET(RC_BOLD_NAME_ANCHORS,    bold_name_anchors),
#ifndef DISABLE_FTP
     PARSE_LST(RC_BROKEN_FTP_EPSV,      broken_ftp_epsv),
     PARSE_LST(RC_BROKEN_FTP_RETR,      broken_ftp_retr),
#endif
     PARSE_PRG(RC_BZIP2_PATH,           ppBZIP2),
     PARSE_SET(RC_CASE_SENSITIVE_ALWAYS_ON, LYcase_sensitive),
     PARSE_FUN(RC_CHARACTER_SET,        character_set_fun),
#ifdef CAN_SWITCH_DISPLAY_CHARSET
     PARSE_STR(RC_CHARSET_SWITCH_RULES, charset_switch_rules),
     PARSE_STR(RC_CHARSETS_DIRECTORY,   charsets_directory),
#endif
     PARSE_SET(RC_CHECKMAIL,            check_mail),
     PARSE_PRG(RC_CHMOD_PATH,           ppCHMOD),
     PARSE_SET(RC_COLLAPSE_BR_TAGS,     LYCollapseBRs),
#ifdef USE_COLOR_TABLE
     PARSE_FUN(RC_COLOR,                color_fun),
#endif
#ifdef USE_COLOR_STYLE
     PARSE_FUN(RC_COLOR_STYLE,          lynx_lss_file_fun),
#endif
     PARSE_PRG(RC_COMPRESS_PATH,        ppCOMPRESS),
     PARSE_PRG(RC_COPY_PATH,            ppCOPY),
     PARSE_INT(RC_CONNECT_TIMEOUT,      connect_timeout),
     PARSE_SET(RC_CONV_JISX0201KANA,    conv_jisx0201kana),
     PARSE_STR(RC_COOKIE_ACCEPT_DOMAINS, LYCookieSAcceptDomains),
#ifdef USE_PERSISTENT_COOKIES
     PARSE_STR(RC_COOKIE_FILE,          LYCookieFile),
#endif /* USE_PERSISTENT_COOKIES */
     PARSE_STR(RC_COOKIE_LOOSE_INVALID_DOMAINS, LYCookieSLooseCheckDomains),
     PARSE_STR(RC_COOKIE_QUERY_INVALID_DOMAINS, LYCookieSQueryCheckDomains),
     PARSE_STR(RC_COOKIE_REJECT_DOMAINS, LYCookieSRejectDomains),
#ifdef USE_PERSISTENT_COOKIES
     PARSE_STR(RC_COOKIE_SAVE_FILE,     LYCookieSaveFile),
#endif /* USE_PERSISTENT_COOKIES */
     PARSE_STR(RC_COOKIE_STRICT_INVALID_DOMAIN, LYCookieSStrictCheckDomains),
     PARSE_Env(RC_CSO_PROXY,            0),
#ifdef VMS
     PARSE_PRG(RC_CSWING_PATH,          ppCSWING),
#endif
     PARSE_TIM(RC_DELAYSECS,            DelaySecs),
     PARSE_FUN(RC_DEFAULT_BOOKMARK_FILE, default_bookmark_file_fun),
     PARSE_FUN(RC_DEFAULT_CACHE_SIZE,   default_cache_size_fun),
#ifdef USE_DEFAULT_COLORS
     PARSE_FUN(RC_DEFAULT_COLORS,       default_colors_fun),
#endif
     PARSE_FUN(RC_DEFAULT_EDITOR,       default_editor_fun),
     PARSE_STR(RC_DEFAULT_INDEX_FILE,   indexfile),
     PARSE_ENU(RC_DEFAULT_KEYPAD_MODE,  keypad_mode, tbl_keypad_mode),
     PARSE_FUN(RC_DEFAULT_KEYPAD_MODE_NUMARO, numbers_as_arrows_fun),
     PARSE_ENU(RC_DEFAULT_USER_MODE,    user_mode, tbl_user_mode),
#if defined(VMS) && defined(VAXC) && !defined(__DECC)
     PARSE_INT(RC_DEFAULT_VIRTUAL_MEMORY_SIZE, HTVirtualMemorySize),
#endif
#ifdef DIRED_SUPPORT
     PARSE_FUN(RC_DIRED_MENU,           dired_menu_fun),
#endif
#ifdef USE_CHARSET_CHOICE
     PARSE_FUN(RC_DISPLAY_CHARSET_CHOICE, parse_display_charset_choice),
#endif
     PARSE_SET(RC_DONT_WRAP_PRE,        dont_wrap_pre),
     PARSE_ADD(RC_DOWNLOADER,           downloaders),
     PARSE_SET(RC_EMACS_KEYS_ALWAYS_ON, emacs_keys),
     PARSE_FUN(RC_ENABLE_LYNXRC,        enable_lynxrc),
     PARSE_SET(RC_ENABLE_SCROLLBACK,    enable_scrollback),
#ifdef USE_EXTERNALS
     PARSE_ADD(RC_EXTERNAL,             externals),
     PARSE_FUN(RC_EXTERNAL_MENU,        external_fun),
#endif
     PARSE_Env(RC_FINGER_PROXY,         0),
#if defined(_WINDOWS)	/* 1998/10/05 (Mon) 17:34:15 */
     PARSE_SET(RC_FOCUS_WINDOW,         focus_window),
#endif
     PARSE_SET(RC_FORCE_8BIT_TOUPPER,   UCForce8bitTOUPPER),
     PARSE_ENU(RC_FORCE_COOKIE_PROMPT,  cookie_noprompt, tbl_force_prompt),
     PARSE_SET(RC_FORCE_EMPTY_HREFLESS_A, force_empty_hrefless_a),
     PARSE_SET(RC_FORCE_HTML,           LYforce_HTML_mode),
     PARSE_SET(RC_FORCE_SSL_COOKIES_SECURE, LYForceSSLCookiesSecure),
#ifdef USE_SSL
     PARSE_ENU(RC_FORCE_SSL_PROMPT,     ssl_noprompt, tbl_force_prompt),
#endif
#if !defined(NO_OPTION_FORMS) && !defined(NO_OPTION_MENU)
     PARSE_SET(RC_FORMS_OPTIONS,        LYUseFormsOptions),
#endif
     PARSE_STR(RC_FTP_FORMAT,           ftp_format),
#ifndef DISABLE_FTP
     PARSE_SET(RC_FTP_PASSIVE,          ftp_passive),
#endif
     PARSE_Env(RC_FTP_PROXY,            0),
     PARSE_STR(RC_GLOBAL_EXTENSION_MAP, global_extension_map),
     PARSE_STR(RC_GLOBAL_MAILCAP,       global_type_map),
     PARSE_Env(RC_GOPHER_PROXY,         0),
     PARSE_SET(RC_GOTOBUFFER,           goto_buffer),
     PARSE_PRG(RC_GZIP_PATH,            ppGZIP),
     PARSE_STR(RC_HELPFILE,             helpfile),
     PARSE_FUN(RC_HIDDENLINKS,          hiddenlinks_fun),
#ifdef MARK_HIDDEN_LINKS
     PARSE_STR(RC_HIDDEN_LINK_MARKER,   hidden_link_marker),
#endif
     PARSE_SET(RC_HISTORICAL_COMMENTS,  historical_comments),
     PARSE_SET(RC_HTML5_CHARSETS,       html5_charsets),
#ifdef USE_PRETTYSRC
     PARSE_FUN(RC_HTMLSRC_ATTRNAME_XFORM, read_htmlsrc_attrname_xform),
     PARSE_FUN(RC_HTMLSRC_TAGNAME_XFORM, read_htmlsrc_tagname_xform),
#endif
     PARSE_FUN(RC_HTTP_PROTOCOL,        get_http_protocol),
     PARSE_Env(RC_HTTP_PROXY,           0),
     PARSE_Env(RC_HTTPS_PROXY,          0),
     PARSE_REQ(RC_INCLUDE,              0),
     PARSE_PRG(RC_INFLATE_PATH,         ppINFLATE),
     PARSE_TIM(RC_INFOSECS,             InfoSecs),
     PARSE_PRG(RC_INSTALL_PATH,         ppINSTALL),
     PARSE_STR(RC_JUMP_PROMPT,          jumpprompt),
     PARSE_SET(RC_JUMPBUFFER,           jump_buffer),
     PARSE_FUN(RC_JUMPFILE,             jumpfile_fun),
#ifdef USE_JUSTIFY_ELTS
     PARSE_SET(RC_JUSTIFY,              ok_justify),
     PARSE_INT(RC_JUSTIFY_MAX_VOID_PERCENT, justify_max_void_percent),
#endif
#ifdef EXP_KEYBOARD_LAYOUT
     PARSE_FUN(RC_KEYBOARD_LAYOUT,      keyboard_layout_fun),
#endif
     PARSE_FUN(RC_KEYMAP,               keymap_fun),
     PARSE_SET(RC_LEFTARROW_IN_TEXTFLD_PROMPT, textfield_prompt_at_left_edge),
     PARSE_SET(RC_LISTONLY,             dump_links_only),
#ifndef VMS
     PARSE_STR(RC_LIST_FORMAT,          list_format),
#endif
     PARSE_SET(RC_LIST_INLINE,          dump_links_inline),
#ifndef DISABLE_NEWS
     PARSE_SET(RC_LIST_NEWS_DATES,      LYListNewsDates),
     PARSE_SET(RC_LIST_NEWS_NUMBERS,    LYListNewsNumbers),
#endif
#ifdef USE_LOCALE_CHARSET
     PARSE_SET(RC_LOCALE_CHARSET,       LYLocaleCharset),
#endif
     PARSE_STR(RC_LOCAL_DOMAIN,         LYLocalDomain),
     PARSE_SET(RC_LOCALHOST,            local_host_only),
     PARSE_FUN(RC_LOCALHOST_ALIAS,      localhost_alias_fun),
#if defined(EXEC_LINKS) || defined(EXEC_SCRIPTS)
     PARSE_SET(RC_LOCAL_EXECUTION_LINKS_ALWAYS, local_exec),
     PARSE_SET(RC_LOCAL_EXECUTION_LINKS_LOCAL, local_exec_on_local_files),
#endif
     PARSE_STR(RC_LYNX_HOST_NAME,       LYHostName),
     PARSE_FUN(RC_LYNX_SIG_FILE,        lynx_sig_file_fun),
#ifdef LYNXCGI_LINKS
#ifndef VMS
     PARSE_STR(RC_LYNXCGI_DOCUMENT_ROOT, LYCgiDocumentRoot),
#endif
     PARSE_FUN(RC_LYNXCGI_ENVIRONMENT,  lynxcgi_environment_fun),
#endif
#if USE_VMS_MAILER
     PARSE_STR(RC_MAIL_ADRS,            mail_adrs),
#endif
     PARSE_SET(RC_MAIL_SYSTEM_ERROR_LOGGING, error_logging),
     PARSE_SET(RC_MAKE_LINKS_FOR_ALL_IMAGES, clickable_images),
     PARSE_SET(RC_MAKE_PSEUDO_ALTS_FOR_INLINES, pseudo_inline_alts),
     PARSE_INT(RC_MAX_COOKIES_BUFFER,   max_cookies_buffer),
     PARSE_INT(RC_MAX_COOKIES_DOMAIN,   max_cookies_domain),
     PARSE_INT(RC_MAX_COOKIES_GLOBAL,   max_cookies_global),
     PARSE_INT(RC_MAX_URI_SIZE,         max_uri_size),
     PARSE_TIM(RC_MESSAGESECS,          MessageSecs),
#if defined(HAVE_LIBINTL_H) || defined(HAVE_LIBGETTEXT_H)
     PARSE_FUN(RC_MESSAGE_LANGUAGE,     message_language_fun),
#endif
     PARSE_SET(RC_MINIMAL_COMMENTS,     minimal_comments),
     PARSE_PRG(RC_MKDIR_PATH,           ppMKDIR),
     PARSE_ENU(RC_MULTI_BOOKMARK_SUPPORT, LYMultiBookmarks, tbl_multi_bookmarks),
     PARSE_PRG(RC_MV_PATH,              ppMV),
     PARSE_SET(RC_NCR_IN_BOOKMARKS,     UCSaveBookmarksInUnicode),
#ifdef EXP_NESTED_TABLES
     PARSE_SET(RC_NESTED_TABLES,        nested_tables),
#endif
#ifndef DISABLE_NEWS
     PARSE_FUN(RC_NEWS_CHUNK_SIZE,      news_chunk_size_fun),
     PARSE_FUN(RC_NEWS_MAX_CHUNK,       news_max_chunk_fun),
     PARSE_FUN(RC_NEWS_POSTING,         news_posting_fun),
     PARSE_Env(RC_NEWS_PROXY,           0),
     PARSE_Env(RC_NEWSPOST_PROXY,       0),
     PARSE_Env(RC_NEWSREPLY_PROXY,      0),
     PARSE_Env(RC_NNTP_PROXY,           0),
     PARSE_ENV(RC_NNTPSERVER,           0), /* actually NNTPSERVER */
#endif
     PARSE_SET(RC_NUMBER_FIELDS_ON_LEFT,number_fields_on_left),
     PARSE_SET(RC_NUMBER_LINKS_ON_LEFT, number_links_on_left),
     PARSE_SET(RC_NO_DOT_FILES,         no_dotfiles),
     PARSE_SET(RC_NO_FILE_REFERER,      no_filereferer),
#ifndef VMS
     PARSE_SET(RC_NO_FORCED_CORE_DUMP,  LYNoCore),
#endif
     PARSE_SET(RC_NO_FROM_HEADER,       LYNoFromHeader),
     PARSE_SET(RC_NO_ISMAP_IF_USEMAP,   LYNoISMAPifUSEMAP),
     PARSE_SET(RC_NO_MARGINS,           no_margins),
     PARSE_SET(RC_NO_PAUSE,             no_pause),
     PARSE_Env(RC_NO_PROXY,             0),
     PARSE_SET(RC_NO_REFERER_HEADER,    LYNoRefererHeader),
     PARSE_SET(RC_NO_TABLE_CENTER,      no_table_center),
     PARSE_SET(RC_NO_TITLE,             no_title),
     PARSE_FUN(RC_NONRESTARTING_SIGWINCH, nonrest_sigwinch_fun),
     PARSE_FUN(RC_OUTGOING_MAIL_CHARSET, outgoing_mail_charset_fun),
#ifdef DISP_PARTIAL
     PARSE_SET(RC_PARTIAL,              display_partial_flag),
     PARSE_INT(RC_PARTIAL_THRES,        partial_threshold),
#endif
#ifdef USE_PERSISTENT_COOKIES
     PARSE_SET(RC_PERSISTENT_COOKIES,   persistent_cookies),
#endif /* USE_PERSISTENT_COOKIES */
     PARSE_STR(RC_PERSONAL_EXTENSION_MAP, personal_extension_map),
     PARSE_STR(RC_PERSONAL_MAILCAP,     personal_type_map),
     PARSE_LST(RC_POSITIONABLE_EDITOR,  positionable_editor),
     PARSE_STR(RC_PREFERRED_CHARSET,    pref_charset),
     PARSE_ENU(RC_PREFERRED_ENCODING,   LYAcceptEncoding, tbl_preferred_encoding),
     PARSE_STR(RC_PREFERRED_LANGUAGE,   language),
     PARSE_ENU(RC_PREFERRED_MEDIA_TYPES, LYAcceptMedia, tbl_preferred_media),
     PARSE_SET(RC_PREPEND_BASE_TO_SOURCE, LYPrependBaseToSource),
     PARSE_SET(RC_PREPEND_CHARSET_TO_SOURCE, LYPrependCharsetToSource),
#ifdef USE_PRETTYSRC
     PARSE_SET(RC_PRETTYSRC,            LYpsrc),
     PARSE_FUN(RC_PRETTYSRC_SPEC,       psrcspec_fun),
     PARSE_SET(RC_PRETTYSRC_VIEW_NO_ANCHOR_NUM, psrcview_no_anchor_numbering),
#endif
     PARSE_ADD(RC_PRINTER,              printers),
     PARSE_SET(RC_QUIT_DEFAULT_YES,     LYQuitDefaultYes),
     PARSE_INT(RC_READ_TIMEOUT,         reading_timeout),
     PARSE_FUN(RC_REFERER_WITH_QUERY,   referer_with_query_fun),
#ifdef USE_CMD_LOGGING
     PARSE_TIM(RC_REPLAYSECS,           ReplaySecs),
#endif
     PARSE_SET(RC_REUSE_TEMPFILES,      LYReuseTempfiles),
     PARSE_PRG(RC_RLOGIN_PATH,          ppRLOGIN),
     PARSE_PRG(RC_RMDIR_PATH,           ppRMDIR),
     PARSE_PRG(RC_RM_PATH,              ppRM),
#ifndef NO_RULES
     PARSE_FUN(RC_RULE,                 HTSetConfiguration),
     PARSE_FUN(RC_RULESFILE,            cern_rulesfile_fun),
#endif /* NO_RULES */
     PARSE_STR(RC_SAVE_SPACE,           lynx_save_space),
     PARSE_SET(RC_SCAN_FOR_BURIED_NEWS_REFS, scan_for_buried_news_references),
#if defined(PDCURSES) && defined(PDC_BUILD) && PDC_BUILD >= 2401
     PARSE_FUN(RC_SCREEN_SIZE,          screen_size_fun),
#endif
#ifdef USE_SCROLLBAR
     PARSE_SET(RC_SCROLLBAR,            LYShowScrollbar),
     PARSE_SET(RC_SCROLLBAR_ARROW,      LYsb_arrow),
#endif
     PARSE_SET(RC_SEEK_FRAG_AREA_IN_CUR, LYSeekFragAREAinCur),
     PARSE_SET(RC_SEEK_FRAG_MAP_IN_CUR, LYSeekFragMAPinCur),
#ifdef USE_SESSIONS
     PARSE_SET(RC_AUTO_SESSION,         LYAutoSession),
     PARSE_STR(RC_SESSION_FILE,         LYSessionFile),
     PARSE_FUN(RC_SESSION_LIMIT,        session_limit_fun),
#endif
     PARSE_SET(RC_SET_COOKIES,          LYSetCookies),
     PARSE_SET(RC_SHORT_URL,            long_url_ok),
     PARSE_SET(RC_SHOW_CURSOR,          LYShowCursor),
     PARSE_STR(RC_SHOW_KB_NAME,         LYTransferName),
     PARSE_ENU(RC_SHOW_KB_RATE,         LYTransferRate, tbl_transfer_rate),
     PARSE_Env(RC_SNEWS_PROXY,          0),
     PARSE_Env(RC_SNEWSPOST_PROXY,      0),
     PARSE_Env(RC_SNEWSREPLY_PROXY,     0),
     PARSE_SET(RC_SOFT_DQUOTES,         soft_dquotes),
#ifdef USE_SOURCE_CACHE
     PARSE_ENU(RC_SOURCE_CACHE,         LYCacheSource, tbl_source_cache),
     PARSE_ENU(RC_SOURCE_CACHE_FOR_ABORTED, LYCacheSourceForAborted, tbl_abort_source_cache),
#endif
     PARSE_STR(RC_SSL_CERT_FILE,        SSL_cert_file),
     PARSE_STR(RC_SSL_CLIENT_CERT_FILE, SSL_client_cert_file),
     PARSE_STR(RC_SSL_CLIENT_KEY_FILE,  SSL_client_key_file),
     PARSE_FUN(RC_STARTFILE,            startfile_fun),
     PARSE_FUN(RC_STATUS_BUFFER_SIZE,   status_buffer_size_fun),
     PARSE_SET(RC_STRIP_DOTDOT_URLS,    LYStripDotDotURLs),
     PARSE_SET(RC_SUBSTITUTE_UNDERSCORES, use_underscore),
     PARSE_FUN(RC_SUFFIX,               suffix_fun),
     PARSE_FUN(RC_SUFFIX_ORDER,         suffix_order_fun),
#ifdef SYSLOG_REQUESTED_URLS
     PARSE_SET(RC_SYSLOG_REQUESTED_URLS, syslog_requested_urls),
     PARSE_STR(RC_SYSLOG_TEXT,          syslog_txt),
#endif
     PARSE_FUN(RC_SYSTEM_EDITOR,        system_editor_fun),
     PARSE_STR(RC_SYSTEM_MAIL,          system_mail),
     PARSE_STR(RC_SYSTEM_MAIL_FLAGS,    system_mail_flags),
     PARSE_FUN(RC_TAGSOUP,              get_tagsoup),
     PARSE_PRG(RC_TAR_PATH,             ppTAR),
     PARSE_PRG(RC_TELNET_PATH,          ppTELNET),
#ifdef TEXTFIELDS_MAY_NEED_ACTIVATION
     PARSE_SET(RC_TEXTFIELDS_NEED_ACTIVATION, textfields_activation_option),
#endif
     PARSE_PRG(RC_TN3270_PATH,          ppTN3270),
#if defined(_WINDOWS)
     PARSE_INT(RC_TIMEOUT,              lynx_timeout),
#endif
     PARSE_PRG(RC_TOUCH_PATH,           ppTOUCH),
     PARSE_SET(RC_TRACK_INTERNAL_LINKS, track_internal_links),
     PARSE_SET(RC_TRIM_INPUT_FIELDS,    LYtrimInputFields),
#ifdef EXEC_LINKS
     PARSE_DEF(RC_TRUSTED_EXEC,         EXEC_PATH),
#endif
#ifdef LYNXCGI_LINKS
     PARSE_DEF(RC_TRUSTED_LYNXCGI,      CGI_PATH),
#endif
     PARSE_PRG(RC_UNCOMPRESS_PATH,      ppUNCOMPRESS),
     PARSE_SET(RC_UNDERLINE_LINKS,      LYUnderlineLinks),
     PARSE_SET(RC_UNIQUE_URLS,          unique_urls),
     PARSE_PRG(RC_UNZIP_PATH,           ppUNZIP),
#ifdef DIRED_SUPPORT
     PARSE_ADD(RC_UPLOADER,             uploaders),
#endif
     PARSE_STR(RC_URL_DOMAIN_PREFIXES,  URLDomainPrefixes),
     PARSE_STR(RC_URL_DOMAIN_SUFFIXES,  URLDomainSuffixes),
#ifdef VMS
     PARSE_SET(RC_USE_FIXED_RECORDS,    UseFixedRecords),
#endif
#if defined(USE_MOUSE)
     PARSE_SET(RC_USE_MOUSE,            LYUseMouse),
#endif
     PARSE_SET(RC_USE_SELECT_POPUPS,    LYSelectPopups),
     PARSE_PRG(RC_UUDECODE_PATH,        ppUUDECODE),
     PARSE_SET(RC_VERBOSE_IMAGES,       verbose_img),
     PARSE_SET(RC_VI_KEYS_ALWAYS_ON,    vi_keys),
     PARSE_FUN(RC_VIEWER,               viewer_fun),
     PARSE_Env(RC_WAIS_PROXY,           0),
     PARSE_SET(RC_WAIT_VIEWER_TERMINATION, wait_viewer_termination),
     PARSE_SET(RC_WITH_BACKSPACES,      with_backspaces),
     PARSE_STR(RC_XLOADIMAGE_COMMAND,   XLoadImageCommand),
     PARSE_SET(RC_XHTML_PARSING,        LYxhtml_parsing),
     PARSE_PRG(RC_ZCAT_PATH,            ppZCAT),
     PARSE_PRG(RC_ZIP_PATH,             ppZIP),

     PARSE_NIL
};
/* *INDENT-ON* */

static char *lynxcfginfo_url = NULL;	/* static */

#if defined(HAVE_CONFIG_H) && !defined(NO_CONFIG_INFO)
static char *configinfo_url = NULL;	/* static */
#endif

/*
 * Free memory allocated in 'read_cfg()'
 */
void free_lynx_cfg(void)
{
    Config_Type *tbl;

    for (tbl = Config_Table; tbl->name != 0; tbl++) {
	ParseUnionPtr q = ParseUnionOf(tbl);

	switch (tbl->type) {
	case CONF_ENV:
	    if (q->str_value != 0) {
		char *name = *(q->str_value);
		char *eqls = StrChr(name, '=');

		if (eqls != 0) {
		    *eqls = 0;
#ifdef VMS
		    Define_VMSLogical(name, NULL);
#else
# ifdef HAVE_PUTENV
		    if (putenv(name))
			break;
# else
		    unsetenv(name);
# endif
#endif
		}
		FREE(*(q->str_value));
		FREE(q->str_value);
		/* is it enough for reload_read_cfg() to clean up
		 * the result of putenv()?  No for certain platforms.
		 */
	    }
	    break;
	default:
	    break;
	}
    }
    free_all_item_lists();
#ifdef DIRED_SUPPORT
    reset_dired_menu();		/* frees and resets dired menu items - kw */
#endif
    FREE(lynxcfginfo_url);
#if defined(HAVE_CONFIG_H) && !defined(NO_CONFIG_INFO)
    FREE(configinfo_url);
#endif
}

static Config_Type *lookup_config(const char *name)
{
    Config_Type *tbl = Config_Table;
    char ch = (char) TOUPPER(*name);

    while (tbl->name != 0) {
	char ch1 = tbl->name[0];

	if ((ch == TOUPPER(ch1))
	    && (0 == strcasecomp(name, tbl->name)))
	    break;

	tbl++;
    }
    return tbl;
}

/*
 * If the given value is an absolute path (by syntax), or we can read it, use
 * the value as given.  Otherwise, assume it must be in the same place we read
 * the parent configuration file from.
 *
 * Note:  only read files from the current directory if there's no parent
 * filename, otherwise it leads to user surprise.
 */
static char *actual_filename(const char *cfg_filename,
			     const char *parent_filename,
			     const char *dft_filename)
{
    char *my_filename = NULL;

    if (!LYisAbsPath(cfg_filename)
	&& !(parent_filename == 0 && LYCanReadFile(cfg_filename))) {
	if (LYIsTilde(cfg_filename[0]) && LYIsPathSep(cfg_filename[1])) {
	    HTSprintf0(&my_filename, "%s%s", Home_Dir(), cfg_filename + 1);
	} else {
	    if (parent_filename != 0) {
		StrAllocCopy(my_filename, parent_filename);
		*LYPathLeaf(my_filename) = '\0';
		StrAllocCat(my_filename, cfg_filename);
	    }
	    if (my_filename == 0 || !LYCanReadFile(my_filename)) {
		StrAllocCopy(my_filename, dft_filename);
		*LYPathLeaf(my_filename) = '\0';
		StrAllocCat(my_filename, cfg_filename);
		if (!LYCanReadFile(my_filename)) {
		    StrAllocCopy(my_filename,
				 LYFindConfigFile(cfg_filename,
						  dft_filename));
		}
	    }
	}
    } else {
	StrAllocCopy(my_filename, cfg_filename);
    }
    return my_filename;
}

FILE *LYOpenCFG(const char *cfg_filename,
		const char *parent_filename,
		const char *dft_filename)
{
    char *my_file = actual_filename(cfg_filename, parent_filename, dft_filename);
    FILE *result;

    CTRACE((tfp, "opening config file %s\n", my_file));
    result = fopen(my_file, TXT_R);
    FREE(my_file);

    return result;
}

#define NOPTS_ ( TABLESIZE(Config_Table) - 1 )
typedef BOOL (optidx_set_t)[NOPTS_];

 /* if element is FALSE, then it's allowed in the current file */

#define optidx_set_AND(r,a,b) \
    {\
	unsigned i1;\
	for (i1 = 0; i1 < NOPTS_; ++i1) \
	    (r)[i1]= (BOOLEAN) ((a)[i1] || (b)[i1]); \
    }

/*
 * For simple (boolean, string, integer, time) values, set the corresponding
 * configuration variable.
 */
BOOL LYSetConfigValue(const char *name,
		      const char *param)
{
    BOOL changed = TRUE;
    char *value = NULL;
    Config_Type *tbl = lookup_config(name);
    ParseUnionPtr q = ParseUnionOf(tbl);
    char *temp_name = 0;
    char *temp_value = 0;

    StrAllocCopy(value, param);
    switch (tbl->type) {
    case CONF_BOOL:
	if (q->set_value != 0)
	    *(q->set_value) = is_true(value);
	break;

    case CONF_FUN:
	if (q->fun_value != 0)
	    (*(q->fun_value)) (value);
	break;

    case CONF_TIME:
	if (q->int_value != 0) {
	    float ival;

	    if (1 == LYscanFloat(value, &ival)) {
		*(q->int_value) = (int) SECS2Secs(ival);
	    }
	}
	break;

    case CONF_ENUM:
	if (tbl->table != 0)
	    LYgetEnum(tbl->table, value, q->int_value);
	break;

    case CONF_INT:
	if (q->int_value != 0) {
	    int ival;

	    if (1 == sscanf(value, "%d", &ival))
		*(q->int_value) = ival;
	}
	break;

    case CONF_STR:
	if (q->str_value != 0)
	    StrAllocCopy(*(q->str_value), value);
	break;

    case CONF_ENV:
    case CONF_ENV2:

	if (StrAllocCopy(temp_name, name)) {
	    if (tbl->type == CONF_ENV)
		LYLowerCase(temp_name);
	    else
		LYUpperCase(temp_name);

	    if (LYGetEnv(temp_name) == 0) {
#ifdef VMS
		Define_VMSLogical(temp_name, value);
#else
		if (q->str_value == 0) {
		    q->str_value = typecalloc(char *);

		    if (q->str_value == 0)
			outofmem(__FILE__, "LYSetConfigValue");
		}

		HTSprintf0(q->str_value, "%s=%s", temp_name, value);
		putenv(*(q->str_value));
#endif
	    }
	    FREE(temp_name);
	}
	break;
    case CONF_ADD_ITEM:
	if (q->add_value != 0)
	    add_item_to_list(value,
			     q->add_value,
			     (q->add_value == &printers),
			     FALSE);
	break;

    case CONF_ADD_STRING:
	if (*(q->lst_value) == NULL) {
	    *(q->lst_value) = HTList_new();
	}
	temp_value = NULL;
	StrAllocCopy(temp_value, value);
	HTList_appendObject(*(q->lst_value), temp_value);
	temp_value = NULL;
	break;

#if defined(EXEC_LINKS) || defined(LYNXCGI_LINKS)
    case CONF_ADD_TRUSTED:
	add_trusted(value, (int) q->def_value);
	break;
#endif

    case CONF_PRG:
	if (isEmpty(value)) {
	    HTSetProgramPath((ProgramPaths) (q->def_value), NULL);
	} else if (StrAllocCopy(temp_value, value)) {
	    HTSetProgramPath((ProgramPaths) (q->def_value), temp_value);
	}
	break;

    default:
	changed = FALSE;
	break;
    }
    FREE(value);

    return changed;
}

/*
 * Process the configuration file (lynx.cfg).
 *
 * 'allowed' is a pointer to HTList of allowed options.  Since the included
 * file can also include other files with a list of acceptable options, these
 * lists are ANDed.
 */
static void do_read_cfg(const char *cfg_filename,
			const char *parent_filename,
			int nesting_level,
			FILE *fp0,
			optidx_set_t *allowed)
{
    FILE *fp;
    char *buffer = 0;

    CTRACE((tfp, "Loading cfg file '%s'.\n", cfg_filename));

    /*
     * Don't get hung up by an include file loop.  Arbitrary max depth
     * of 10.  - BL
     */
    if (nesting_level > 10) {
	fprintf(stderr,
		gettext("More than %d nested lynx.cfg includes -- perhaps there is a loop?!?\n"),
		nesting_level - 1);
	fprintf(stderr, gettext("Last attempted include was '%s',\n"), cfg_filename);
	fprintf(stderr, gettext("included from '%s'.\n"), parent_filename);
	exit_immediately(EXIT_FAILURE);
    }
    /*
     * Locate and open the file.
     */
    if (!cfg_filename || strlen(cfg_filename) == 0) {
	CTRACE((tfp, "No filename following -cfg switch!\n"));
	return;
    }
    if ((fp = LYOpenCFG(cfg_filename, parent_filename, LYNX_CFG_FILE)) == 0) {
	CTRACE((tfp, "lynx.cfg file not found as '%s'\n", cfg_filename));
	return;
    }
    have_read_cfg = TRUE;

    /*
     * Process each line in the file.
     */
    if (show_cfg) {
	time_t t;

	time(&t);
	printf("### %s %s, at %s", LYNX_NAME, LYNX_VERSION, ctime(&t));
    }
    while (LYSafeGets(&buffer, fp) != 0) {
	char *name, *value;
	char *cp;
	Config_Type *tbl;

	/* Most lines in the config file are comment lines.  Weed them out
	 * now.  Also, leading whitespace is ok, so trim it.
	 */
	name = LYSkipBlanks(buffer);

	if (ispunct(UCH(*name)))
	    continue;

	LYTrimTrailing(name);

	if (*name == 0)
	    continue;

	/* Significant lines are of the form KEYWORD:WHATEVER */
	if ((value = StrChr(name, ':')) == 0) {
	    /* fprintf (stderr, "Bad line-- no :\n"); */
	    CTRACE((tfp, "LYReadCFG: missing ':' %s\n", name));
	    continue;
	}

	/* skip past colon, but replace ':' with 0 to make name meaningful */
	*value++ = 0;

	/*
	 * Trim off any trailing comments.
	 *
	 * (Apparently, the original code considers a trailing comment valid
	 * only if preceded by a space character but is not followed by a
	 * colon.  -- JED)
	 */
	if ((cp = strrchr(value, ':')) == 0)
	    cp = value;
	if ((cp = StrChr(cp, '#')) != 0) {
	    cp--;
	    if (isspace(UCH(*cp)))
		*cp = 0;
	}

	CTRACE2(TRACE_CFG, (tfp, "LYReadCFG %s:%s\n", name, value));
	tbl = lookup_config(name);
	if (tbl->name == 0) {
	    /* lynx ignores unknown keywords */
	    CTRACE((tfp, "LYReadCFG: ignored %s:%s\n", name, value));
	    continue;
	}
	if (show_cfg)
	    printf("%s:%s\n", name, value);

	if (allowed && (*allowed)[tbl - Config_Table]) {
	    if (fp0 == NULL)
		fprintf(stderr, "%s is not allowed in the %s\n",
			name, cfg_filename);
	    /*FIXME: we can do something wiser if we are generating
	       the html representation of lynx.cfg - say include this line
	       in bold, or something... */

	    continue;
	}

	(void) ParseUnionOf(tbl);
	switch ((fp0 != 0 && tbl->type != CONF_INCLUDE)
		? CONF_NIL
		: tbl->type) {
	case CONF_BOOL:
	case CONF_FUN:
	case CONF_TIME:
	case CONF_ENUM:
	case CONF_INT:
	case CONF_STR:
	case CONF_ENV:
	case CONF_ENV2:
	case CONF_PRG:
	case CONF_ADD_ITEM:
	case CONF_ADD_STRING:
	case CONF_ADD_TRUSTED:
	    LYSetConfigValue(name, value);
	    break;

	case CONF_INCLUDE:{
		/* include another file */
		optidx_set_t cur_set, anded_set;
		optidx_set_t *resultant_set = NULL;
		char *p1, *p2, savechar;
		BOOL any_optname_found = FALSE;

		char *url = NULL;
		char *cp1 = NULL;
		const char *sep = NULL;

		if ((p1 = strstr(value, sep = " for ")) != 0
#if defined(UNIX) && !defined(USE_DOS_DRIVES)
		    || (p1 = strstr(value, sep = ":")) != 0
#endif
		    ) {
		    *p1 = '\0';
		    p1 += strlen(sep);
		}
#ifndef NO_CONFIG_INFO
		if (fp0 != 0 && !no_lynxcfg_xinfo) {
		    char *my_file = actual_filename(value, cfg_filename, LYNX_CFG_FILE);

		    LYLocalFileToURL(&url, my_file);
		    FREE(my_file);
		    StrAllocCopy(cp1, value);
		    if (StrChr(value, '&') || StrChr(value, '<')) {
			LYEntify(&cp1, TRUE);
		    }

		    fprintf(fp0, "%s:<a href=\"%s\">%s</a>\n\n", name, url, cp1);
		    fprintf(fp0, "    #&lt;begin  %s&gt;\n", cp1);
		}
#endif

		if (p1) {
		    while (*(p1 = LYSkipBlanks(p1)) != 0) {
			Config_Type *tbl2;

			p2 = LYSkipNonBlanks(p1);
			savechar = *p2;
			*p2 = 0;

			tbl2 = lookup_config(p1);
			if (tbl2->name == 0) {
			    if (fp0 == NULL)
				fprintf(stderr,
					"unknown option name %s in %s\n",
					p1, cfg_filename);
			} else {
			    unsigned i;

			    if (!any_optname_found) {
				any_optname_found = TRUE;
				for (i = 0; i < NOPTS_; ++i)
				    cur_set[i] = TRUE;
			    }
			    cur_set[tbl2 - Config_Table] = FALSE;
			}
			if (savechar && p2[1])
			    p1 = p2 + 1;
			else
			    break;
		    }
		}
		if (!allowed) {
		    if (!any_optname_found)
			resultant_set = NULL;
		    else
			resultant_set = &cur_set;
		} else {
		    if (!any_optname_found)
			resultant_set = allowed;
		    else {
			optidx_set_AND(anded_set, *allowed, cur_set);
			resultant_set = &anded_set;
		    }
		}

#ifndef NO_CONFIG_INFO
		/*
		 * Now list the opts that are allowed in included file.  If all
		 * opts are allowed, then emit nothing, else emit an effective set
		 * of allowed options in <ul>.  Option names will be uppercased.
		 * FIXME:  uppercasing option names can be considered redundant.
		 */
		if (fp0 != 0 && !no_lynxcfg_xinfo && resultant_set) {
		    char *buf = NULL;
		    unsigned i;

		    fprintf(fp0, "     Options allowed in this file:\n");
		    for (i = 0; i < NOPTS_; ++i) {
			if ((*resultant_set)[i])
			    continue;
			StrAllocCopy(buf, Config_Table[i].name);
			LYUpperCase(buf);
			fprintf(fp0, "         * %s\n", buf);
		    }
		    FREE(buf);
		}
#endif
		do_read_cfg(value, cfg_filename, nesting_level + 1, fp0, resultant_set);

#ifndef NO_CONFIG_INFO
		if (fp0 != 0 && !no_lynxcfg_xinfo) {
		    fprintf(fp0, "    #&lt;end of %s&gt;\n\n", cp1);
		    FREE(url);
		    FREE(cp1);
		}
#endif
	    }
	    break;

	default:
	    if (fp0 != 0) {
		if (StrChr(value, '&') || StrChr(value, '<')) {
		    char *cp1 = NULL;

		    StrAllocCopy(cp1, value);
		    LYEntify(&cp1, TRUE);
		    fprintf(fp0, "%s:%s\n", name, cp1);
		    FREE(cp1);
		} else {
		    fprintf(fp0, "%s:%s\n", name, value);
		}
	    }
	    break;
	}
    }

    LYCloseInput(fp);

    /*
     * If any DOWNLOADER:  commands have always_enabled set (:TRUE), make
     * override_no_download TRUE, so that other restriction settings will not
     * block presentation of a download menu with those always_enabled options
     * still available.  - FM
     */
    if (downloaders != 0) {
	lynx_list_item_type *cur_download;

	cur_download = downloaders;
	while (cur_download != 0) {
	    if (cur_download->always_enabled) {
		override_no_download = TRUE;
		break;
	    }
	    cur_download = cur_download->next;
	}
    }

    /*
     * If any COOKIE_{ACCEPT,REJECT}_DOMAINS have been defined,
     * process them.  These are comma delimited lists of
     * domains. - BJP
     *
     * And for query/strict/loose invalid cookie checking. - BJP
     */
    LYConfigCookies();
}

/* this is a public interface to do_read_cfg */
void read_cfg(const char *cfg_filename,
	      const char *parent_filename,
	      int nesting_level,
	      FILE *fp0)
{
    HTInitProgramPaths(TRUE);
    do_read_cfg(cfg_filename, parent_filename, nesting_level, fp0, NULL);
}

#ifndef NO_CONFIG_INFO
static void extra_cfg_link(FILE *fp, const char *href,
			   const char *name)
{
    fprintf(fp, "<a href=\"%s\">%s</a>",
	    href, name);
}
#endif /* NO_CONFIG_INFO */

/*
 * Show rendered lynx.cfg data without comments, LYNXCFG:/ internal page. 
 * Called from getfile() cycle:  we create and load the page just in place and
 * return to mainloop().
 */
int lynx_cfg_infopage(DocInfo *newdoc)
{
    static char tempfile[LY_MAXPATH] = "\0";
    DocAddress WWWDoc;		/* need on exit */
    char *temp = 0;
    char *cp1 = NULL;
    FILE *fp0;

#ifndef NO_CONFIG_INFO
    /*-------------------------------------------------
     * kludge a link from LYNXCFG:/, the URL was:
     * "  <a href=\"LYNXCFG://reload\">RELOAD THE CHANGES</a>\n"
     *--------------------------------------------------*/

    if (!no_lynxcfg_xinfo && (strstr(newdoc->address, "LYNXCFG://reload"))) {
	/*
	 * Some stuff to reload read_cfg(), but also load options menu items
	 * and command-line options to make things consistent.  Implemented in
	 * LYMain.c
	 */
	reload_read_cfg();

	/*
	 * now pop-up and return to updated LYNXCFG:/ page, remind
	 * postoptions() but much simpler:
	 */
	/*
	 * But check whether the top history document is really the expected
	 * LYNXCFG:  page.  - kw
	 */
	if (HTMainText && nhist > 0 &&
	    !strcmp(HTLoadedDocumentTitle(), LYNXCFG_TITLE) &&
	    !strcmp(HTLoadedDocumentURL(), HDOC(nhist - 1).address) &&
	    LYIsUIPage(HDOC(nhist - 1).address, UIP_LYNXCFG) &&
	    (!lynxcfginfo_url ||
	     strcmp(HTLoadedDocumentURL(), lynxcfginfo_url))) {
	    /*  the page was pushed, so pop-up. */
	    LYpop(newdoc);
	    WWWDoc.address = newdoc->address;
	    WWWDoc.post_data = newdoc->post_data;
	    WWWDoc.post_content_type = newdoc->post_content_type;
	    WWWDoc.bookmark = newdoc->bookmark;
	    WWWDoc.isHEAD = newdoc->isHEAD;
	    WWWDoc.safe = newdoc->safe;
	    LYforce_no_cache = FALSE;	/* ! */
	    LYoverride_no_cache = TRUE;		/* ! */

	    /*
	     * Working out of getfile() cycle we reset *no_cache manually here
	     * so HTLoadAbsolute() will return "Document already in memory": 
	     * it was forced reloading obsolete file again without this
	     * (overhead).
	     *
	     * Probably *no_cache was set in a wrong position because of the
	     * internal page...
	     */
	    if (!HTLoadAbsolute(&WWWDoc))
		return (NOT_FOUND);

	    HTuncache_current_document();	/* will never use again */
	    LYUnRegisterUIPage(UIP_LYNXCFG);
	}

	/*  now set up the flag and fall down to create a new LYNXCFG:/ page */
	FREE(lynxcfginfo_url);	/* see below */
    }
#endif /* !NO_CONFIG_INFO */

    /*
     * We regenerate the file if reloading has been requested (with LYK_NOCACHE
     * key).  If we did not regenerate, there would be no way to recover in a
     * session from a situation where the file is corrupted (for example
     * truncated because the file system was full when it was first created -
     * lynx doesn't check for write errors below), short of manual complete
     * removal or perhaps forcing regeneration with LYNXCFG://reload. 
     * Similarly, there would be no simple way to get a different page if
     * user_mode has changed to Advanced after the file was first generated in
     * a non-Advanced mode (the difference being in whether the page includes
     * the link to LYNXCFG://reload or not).
     *
     * We also try to regenerate the file if lynxcfginfo_url is set, indicating
     * that tempfile is valid, but the file has disappeared anyway.  This can
     * happen to a long-lived lynx process if for example some system script
     * periodically cleans up old files in the temp file space.  - kw
     */

    if (LYforce_no_cache && reloading) {
	FREE(lynxcfginfo_url);	/* flag to code below to regenerate - kw */
    } else if (lynxcfginfo_url != NULL) {
	if (!LYCanReadFile(tempfile)) {		/* check existence */
	    FREE(lynxcfginfo_url);	/* flag to code below to try again - kw */
	}
    }
    if (lynxcfginfo_url == 0) {

	if ((fp0 = InternalPageFP(tempfile, TRUE)) == 0)
	    return (NOT_FOUND);

	LYLocalFileToURL(&lynxcfginfo_url, tempfile);

	LYforce_no_cache = TRUE;	/* don't cache this doc */

	BeginInternalPage(fp0, LYNXCFG_TITLE, NULL);
	fprintf(fp0, "<pre>\n");

#ifndef NO_CONFIG_INFO
	if (!no_lynxcfg_xinfo) {
#if defined(HAVE_CONFIG_H) || defined(VMS)
	    if (strcmp(lynx_cfg_file, LYNX_CFG_FILE)) {
		fprintf(fp0, "<em>%s\n%s",
			gettext("The following is read from your lynx.cfg file."),
			gettext("Please read the distribution"));
		LYLocalFileToURL(&temp, LYNX_CFG_FILE);
		fprintf(fp0, " <a href=\"%s\">lynx.cfg</a> ",
			temp);
		FREE(temp);
		fprintf(fp0, "%s</em>\n\n",
			gettext("for more comments."));
	    } else
#endif /* HAVE_CONFIG_H */
	    {
		/* no absolute path... for lynx.cfg on DOS/Win32 */
		fprintf(fp0, "<em>%s\n%s",
			gettext("The following is read from your lynx.cfg file."),
			gettext("Please read the distribution"));
		fprintf(fp0, " </em>lynx.cfg<em> ");
		fprintf(fp0, "%s</em>\n",
			gettext("for more comments."));
	    }

#ifndef NO_CONFIG_INFO
#if defined(HAVE_CONFIG_H) && defined(USE_COLOR_STYLE)
	    if (!no_compileopts_info && !no_lynxcfg_xinfo) {
		fprintf(fp0, "%s</pre><ul><li>", SEE_ALSO);
		extra_cfg_link(fp0, STR_LYNXCFLAGS, COMPILE_OPT_SEGMENT);

		fprintf(fp0, "<li>");
		LYLocalFileToURL(&temp, lynx_lss_file);
		extra_cfg_link(fp0, temp, COLOR_STYLE_SEGMENT);
		fprintf(fp0, "</ul><pre>\n");
	    } else
#endif
	    {
		fprintf(fp0, "%s ", SEE_ALSO);
#if defined(HAVE_CONFIG_H)
		if (!no_compileopts_info) {
		    extra_cfg_link(fp0, STR_LYNXCFLAGS, COMPILE_OPT_SEGMENT);
		}
#endif
#if defined(USE_COLOR_STYLE)
		if (!no_lynxcfg_xinfo) {
		    LYLocalFileToURL(&temp, lynx_lss_file);
		    extra_cfg_link(fp0, temp, COLOR_STYLE_SEGMENT);
		}
#endif
		fprintf(fp0, "\n\n");
	    }
#endif /* NO_CONFIG_INFO */

	    /** a new experimental link ... **/
	    if (user_mode == ADVANCED_MODE)
		fprintf(fp0, "  <a href=\"%s//reload\">%s</a>\n",
			STR_LYNXCFG,
			gettext("RELOAD THE CHANGES"));

	    LYLocalFileToURL(&temp, lynx_cfg_file);
	    StrAllocCopy(cp1, lynx_cfg_file);
	    if (StrChr(lynx_cfg_file, '&') || StrChr(lynx_cfg_file, '<')) {
		LYEntify(&cp1, TRUE);
	    }
	    fprintf(fp0, "\n    #<em>%s <a href=\"%s\">%s</a></em>\n",
		    gettext("Your primary configuration"),
		    temp,
		    cp1);
	    FREE(temp);
	    FREE(cp1);

	} else
#endif /* !NO_CONFIG_INFO */

	    fprintf(fp0, "<em>%s</em>\n\n",
		    gettext("The following is read from your lynx.cfg file."));

	/*
	 * Process the configuration file.
	 */
	read_cfg(lynx_cfg_file, "main program", 1, fp0);

	fprintf(fp0, "</pre>\n");
	EndInternalPage(fp0);
	LYCloseTempFP(fp0);
	LYRegisterUIPage(lynxcfginfo_url, UIP_LYNXCFG);
    }

    /* return to getfile() cycle */
    StrAllocCopy(newdoc->address, lynxcfginfo_url);
    WWWDoc.address = newdoc->address;
    WWWDoc.post_data = newdoc->post_data;
    WWWDoc.post_content_type = newdoc->post_content_type;
    WWWDoc.bookmark = newdoc->bookmark;
    WWWDoc.isHEAD = newdoc->isHEAD;
    WWWDoc.safe = newdoc->safe;

    if (!HTLoadAbsolute(&WWWDoc))
	return (NOT_FOUND);
#ifdef DIRED_SUPPORT
    lynx_edit_mode = FALSE;
#endif /* DIRED_SUPPORT */
    return (NORMAL);
}

#if defined(HAVE_CONFIG_H) && !defined(NO_CONFIG_INFO)
/*
 * Compile-time definitions info, LYNXCOMPILEOPTS:/ internal page, from
 * getfile() cycle.
 */
int lynx_compile_opts(DocInfo *newdoc)
{
    static char tempfile[LY_MAXPATH] = "\0";

#define PutDefs(table, N) fprintf(fp0, "%-35s %s\n", table[N].name, table[N].value)
#include <cfg_defs.h>
    unsigned n;
    DocAddress WWWDoc;		/* need on exit */
    FILE *fp0;

    /* In general, create the page only once - compile-time data will not
     * change...  But we will regenerate the file anyway, in a few situations:
     *
     * (a) configinfo_url has been FREEd - this can happen if free_lynx_cfg()
     * was called as part of a LYNXCFG://reload action.
     *
     * (b) reloading has been requested (with LYK_NOCACHE key).  If we did not
     * regenerate, there would be no way to recover in a session from a
     * situation where the file is corrupted (for example truncated because the
     * file system was full when it was first created - lynx doesn't check for
     * write errors below), short of manual complete removal or forcing
     * regeneration with LYNXCFG://reload.
     *
     * (c) configinfo_url is set, indicating that tempfile is valid, but the
     * file has disappeared anyway.  This can happen to a long-lived lynx
     * process if for example some system script periodically cleans up old
     * files in the temp file space.  - kw
     */

    if (LYforce_no_cache && reloading) {
	FREE(configinfo_url);	/* flag to code below to regenerate - kw */
    } else if (configinfo_url != NULL) {
	if (!LYCanReadFile(tempfile)) {		/* check existence */
	    FREE(configinfo_url);	/* flag to code below to try again - kw */
	}
    }
    if (configinfo_url == NULL) {
	if ((fp0 = InternalPageFP(tempfile, TRUE)) == 0)
	    return (NOT_FOUND);

	LYLocalFileToURL(&configinfo_url, tempfile);

	BeginInternalPage(fp0, CONFIG_DEF_TITLE, NULL);
	fprintf(fp0, "<pre>\n");

	fprintf(fp0, "\n%s<br>\n<em>config.cache</em>\n", AUTOCONF_CONFIG_CACHE);
	for (n = 0; n < TABLESIZE(config_cache); n++) {
	    PutDefs(config_cache, n);
	}
	fprintf(fp0, "\n%s<br>\n<em>lynx_cfg.h</em>\n", AUTOCONF_LYNXCFG_H);
	for (n = 0; n < TABLESIZE(config_defines); n++) {
	    PutDefs(config_defines, n);
	}
	fprintf(fp0, "</pre>\n");
	EndInternalPage(fp0);
	LYCloseTempFP(fp0);
	LYRegisterUIPage(configinfo_url, UIP_CONFIG_DEF);
    }

    /* exit to getfile() cycle */
    StrAllocCopy(newdoc->address, configinfo_url);
    WWWDoc.address = newdoc->address;
    WWWDoc.post_data = newdoc->post_data;
    WWWDoc.post_content_type = newdoc->post_content_type;
    WWWDoc.bookmark = newdoc->bookmark;
    WWWDoc.isHEAD = newdoc->isHEAD;
    WWWDoc.safe = newdoc->safe;

    if (!HTLoadAbsolute(&WWWDoc))
	return (NOT_FOUND);
#ifdef DIRED_SUPPORT
    lynx_edit_mode = FALSE;
#endif /* DIRED_SUPPORT */
    return (NORMAL);
}
#endif /* !NO_CONFIG_INFO */
