cb_exit
static void cb_exit(void *arg, int v);
cb_exit(NULL, USERBOOT_EXIT_QUIT);
cb_exit(NULL, USERBOOT_EXIT_QUIT);
cb_exit(NULL, USERBOOT_EXIT_QUIT);
cb_exit(NULL, USERBOOT_EXIT_QUIT);
cb_exit(NULL, USERBOOT_EXIT_QUIT);
cb_exit(NULL, USERBOOT_EXIT_QUIT);
cb_exit(NULL, USERBOOT_EXIT_QUIT);
cb_exit(NULL, USERBOOT_EXIT_QUIT);
cb_exit(NULL, 0);
cb_exit(NULL, 1);
cb_exit(NULL, 1);
.exit = cb_exit,