sigignore.c\signal\src - musl - musl - an implementation of the standard library for Linux-based systems

#include <signal.h>
int sigignore(int sig)
{
	struct sigaction sa;
	sigemptyset(&sa.sa_mask);
	sa.sa_handler = SIG_IGN;
	sa.sa_flags = 0;
	return sigaction(sig, &sa, 0);
}