apps/system/cu:  SIGKILL is more appropriate that SIGINT in this circustance.
@@ -284,7 +284,7 @@ int cu_main(int argc, FAR char *argv[])
memset(&sa, 0, sizeof(sa));
sa.sa_handler = sigint;
- sigaction(SIGINT, &sa, NULL);
+ sigaction(SIGKILL, &sa, NULL);
while ((option = getopt(argc, argv, "l:s:eor?")) != ERROR)
{
