linux handle sigusr1 signal

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include <string.h>

void handleSigusr1() {
    puts("Received SIGUSR1");
}

int main(int argc, char *argv[]) {
    struct sigaction sa;
    memset(&sa, 0, sizeof(struct sigaction));
    sa.sa_handler = &handleSigusr1;
    if (sigaction(SIGUSR1, &sa, NULL)) {
        perror("sigaction");
        exit(1);
    }
    while (1) {
        sleep(1);
    }
    return 0;
}