stats_config(
	int item,
	const char *invalue	/* only one type so far */
	)
{
	FILE	*fp;
	const char *value;
	int	len;
	double	old_drift;
#ifndef VMS
	const char temp_ext[] = ".TEMP";
#else
	const char temp_ext[] = "-TEMP";
#endif

	/*
	 * Expand environment strings under Windows NT, since the
	 * command interpreter doesn't do this, the program must.
	 */
#ifdef SYS_WINNT
	char newvalue[MAX_PATH], parameter[MAX_PATH];

	if (!ExpandEnvironmentStrings(invalue, newvalue, MAX_PATH)) {
		switch (item) {
		case STATS_FREQ_FILE:
			strncpy(parameter, "STATS_FREQ_FILE",
				sizeof(parameter));
			break;

		case STATS_LEAP_FILE:
			strncpy(parameter, "STATS_LEAP_FILE",
				sizeof(parameter));
			break;

		case STATS_STATSDIR:
			strncpy(parameter, "STATS_STATSDIR",
				sizeof(parameter));
			break;

		case STATS_PID_FILE:
			strncpy(parameter, "STATS_PID_FILE",
				sizeof(parameter));
			break;

		default:
			strncpy(parameter, "UNKNOWN",
				sizeof(parameter));
			break;
		}
		value = invalue;
		msyslog(LOG_ERR,
			"ExpandEnvironmentStrings(%s) failed: %m\n",
			parameter);
	} else {
		value = newvalue;
	}
#else	 
	value = invalue;
#endif /* SYS_WINNT */

	switch (item) {

	/*
	 * Open and read frequency file.
	 */
	case STATS_FREQ_FILE:
		if (!value || (len = strlen(value)) == 0)
			break;

		stats_drift_file = erealloc(stats_drift_file, len + 1);
		stats_temp_file = erealloc(stats_temp_file, 
		    len + sizeof(".TEMP"));
		memcpy(stats_drift_file, value, (size_t)(len+1));
		memcpy(stats_temp_file, value, (size_t)len);
		memcpy(stats_temp_file + len, temp_ext, sizeof(temp_ext));

		/*
		 * Open drift file and read frequency. If the file is
		 * missing or contains errors, tell the loop to reset.
		 */
		if ((fp = fopen(stats_drift_file, "r")) == NULL)
			break;

		if (fscanf(fp, "%lf", &old_drift) != 1) {
			msyslog(LOG_ERR,
				"format error frequency file %s", 
				stats_drift_file);
			fclose(fp);
			break;

		}
		fclose(fp);
		loop_config(LOOP_FREQ, old_drift);
		prev_drift_comp = drift_comp;
		break;

	/*
	 * Specify statistics directory.
	 */
	case STATS_STATSDIR:

		/*
		 * HMS: the following test is insufficient:
		 * - value may be missing the DIR_SEP
		 * - we still need the filename after it
		 */
		if (strlen(value) >= sizeof(statsdir)) {
			msyslog(LOG_ERR,
			    "statsdir too long (>%d, sigh)",
			    (int)sizeof(statsdir) - 1);
		} else {
			l_fp now;
			int add_dir_sep;
			int value_l = strlen(value);

			/* Add a DIR_SEP unless we already have one. */
			if (value_l == 0)
				add_dir_sep = 0;
			else
				add_dir_sep = (DIR_SEP !=
				    value[value_l - 1]);

			if (add_dir_sep)
				snprintf(statsdir, sizeof(statsdir),
				    "%s%c", value, DIR_SEP);
			else
				snprintf(statsdir, sizeof(statsdir),
				    "%s", value);
			get_systime(&now);
			if (peerstats.prefix == &statsdir[0] &&
			    peerstats.fp != NULL) {
				fclose(peerstats.fp);
				peerstats.fp = NULL;
				filegen_setup(&peerstats, now.l_ui);
			}
			if (loopstats.prefix == &statsdir[0] &&
			    loopstats.fp != NULL) {
				fclose(loopstats.fp);
				loopstats.fp = NULL;
				filegen_setup(&loopstats, now.l_ui);
			}
			if (clockstats.prefix == &statsdir[0] &&
			    clockstats.fp != NULL) {
				fclose(clockstats.fp);
				clockstats.fp = NULL;
				filegen_setup(&clockstats, now.l_ui);
			}
			if (rawstats.prefix == &statsdir[0] &&
			    rawstats.fp != NULL) {
				fclose(rawstats.fp);
				rawstats.fp = NULL;
				filegen_setup(&rawstats, now.l_ui);
			}
			if (sysstats.prefix == &statsdir[0] &&
			    sysstats.fp != NULL) {
				fclose(sysstats.fp);
				sysstats.fp = NULL;
				filegen_setup(&sysstats, now.l_ui);
			}
			if (protostats.prefix == &statsdir[0] &&
			    protostats.fp != NULL) {
				fclose(protostats.fp);
				protostats.fp = NULL;
				filegen_setup(&protostats, now.l_ui);
			}
#ifdef AUTOKEY
			if (cryptostats.prefix == &statsdir[0] &&
			    cryptostats.fp != NULL) {
				fclose(cryptostats.fp);
				cryptostats.fp = NULL;
				filegen_setup(&cryptostats, now.l_ui);
			}
#endif	/* AUTOKEY */
#ifdef DEBUG_TIMING
			if (timingstats.prefix == &statsdir[0] &&
			    timingstats.fp != NULL) {
				fclose(timingstats.fp);
				timingstats.fp = NULL;
				filegen_setup(&timingstats, now.l_ui);
			}
#endif	/* DEBUG_TIMING */
		}
		break;

	/*
	 * Open pid file.
	 */
	case STATS_PID_FILE:
		if ((fp = fopen(value, "w")) == NULL) {
			msyslog(LOG_ERR, "pid file %s: %m",
			    value);
			break;
		}
		fprintf(fp, "%d", (int)getpid());
		fclose(fp);;
		break;

	/*
	 * Read leapseconds file.
	 */
	case STATS_LEAP_FILE:
		if ((fp = fopen(value, "r")) == NULL) {
			msyslog(LOG_ERR, "leapseconds file %s: %m",
			    value);
			break;
		}

		if (leap_file(fp) < 0)
			msyslog(LOG_ERR,
			    "format error leapseconds file %s",
			    value);
		else
			mprintf_event(EVNT_TAI, NULL,
				      "%d leap %s expire %s", leap_tai,
				      fstostr(leap_sec),
				      fstostr(leap_expire));
		fclose(fp);
		break;

	default:
		/* oh well */
		break;
	}
}