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#include <signal.h>

int sighold(int sig)
{
	sigset_t mask;

	sigemptyset(&mask);
	if (sigaddset(&mask, sig) < 0) return -1;
	return sigprocmask(SIG_BLOCK, &mask, 0);
}


#ifdef TEST
int
main(void) {
	return 0;
}
#endif