sigprocmask(SIG_UNBLOCK, &sig_to_block, NULL);
machdep_sys_sigprocmask(SIG_UNBLOCK, &sig_to_block, &oset);
void sig_handler_pause(){	sigset_t sig_to_block, sig_to_pause;	sigfillset(&sig_to_block);	sigemptyset(&sig_to_pause);	sigprocmask(SIG_BLOCK, &sig_to_block, NULL);	if (!sig_to_process) {		sigsuspend(&sig_to_pause);	}	sigprocmask(SIG_UNBLOCK, &sig_to_block, NULL);}