--- a/liboutrt/Makefile	Thu Oct 06 23:15:26 2022 -0800
+++ b/liboutrt/Makefile	Thu Oct 06 23:31:37 2022 -0800
@@ -1,6 +1,6 @@
 CC=	gcc
 CFLAGS=	-O2
-OBJS=	readbin.o
+OBJS=	readbin.o refresh.o
 LIB=	liboutrt.a
 
 all:	${LIB}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/liboutrt/refresh.c	Thu Oct 06 23:31:37 2022 -0800
@@ -0,0 +1,57 @@
+/*
+ * themwi-sip-out and possibly other similar long-running processes in
+ * the future need to be able to pick up updates to the outbound call
+ * routing database without being restarted.  Whenever they need to
+ * consult the route db when handling a new call setup, they will call
+ * refresh_out_routes_db(), which does a stat on the file, followed by
+ * a re-read if the file has changed.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <syslog.h>
+#include "../include/out_routes.h"
+
+extern char outrt_pathname[];
+extern struct stat outrt_file_stat;
+extern struct sip_out_dest *outrt_dest_array;
+extern struct inn_route *outrt_inn_array;
+extern struct special_num_route *outrt_spec_array;
+
+refresh_out_routes_db()
+{
+	int rc;
+	struct stat st;
+
+	rc = stat(outrt_pathname, &st);
+	if (rc < 0) {
+		syslog(LOG_CRIT, "unable to stat %s for refresh: %m",
+			outrt_pathname);
+		return(-1);
+	}
+	if (st.st_mtime == outrt_file_stat.st_mtime &&
+	    st.st_ctime == outrt_file_stat.st_ctime &&
+	    st.st_size  == outrt_file_stat.st_size)
+		return(0);
+	free(outrt_dest_array);
+	if (outrt_inn_array) {
+		free(outrt_inn_array);
+		outrt_inn_array = 0;
+	}
+	if (outrt_spec_array) {
+		free(outrt_spec_array);
+		outrt_spec_array = 0;
+	}
+	rc = read_out_routes_db();
+	if (rc < 0) {
+		syslog(LOG_CRIT, "error reading %s on refresh!",
+			outrt_pathname);
+		exit(1);
+	}
+	return(1);
+}