unix:  performs ioctl on interfaces to check if they're up (press "a" three times)
route: retrieves interface stats via sysctl

Index: src/bwm-ng.c
--- src/bwm-ng.c.orig
+++ src/bwm-ng.c
@@ -210,6 +210,13 @@ int main (int argc, char *argv[]) {
 	/* end of init curses, now set a sigint handler to deinit the screen on ctrl-break */
 	signal(SIGINT,sigint);
 	signal(SIGTERM,sigint);
+	if (out_file_path) {
+		if (pledge("stdio unix cpath wpath route tty", NULL) == -1)
+			deinit(1, "pledge\n");
+	} else {
+		if (pledge("stdio unix route tty", NULL) == -1)
+			deinit(1, "pledge\n");
+	}
 #ifdef CSV	
     /* get stats without verbose if cvs */
 	if (output_method==CSV_OUT && output_count>-1) {