wait for server to send script's exit status

luac.c

@@ -153,5 +153,7 @@ int main(int argc, char **argv)
         exit(1);
     }
 
-    /* FIXME: wait for bytes on socket signifying return value */
+    uint32_t exitstatus = 0;
+    recv(socket, (void *) &exitstatus, sizeof exitstatus, 0);
+    exit((int) ntohl(exitstatus));
 }