SIGSUBST_ENVIRON
CPU_SIGNATURE(OS_SIG, SIGST_EXIT, SIGSUBST_ENVIRON, -1);
sub_state == SIGSUBST_REBOOT || sub_state == SIGSUBST_ENVIRON ||
case SIGSUBST_ENVIRON:
scf_shutdown_callback(SIGSUBST_ENVIRON);
sub_state == SIGSUBST_REBOOT || sub_state == SIGSUBST_ENVIRON ||