Example for signal, strsignal and pause functions (or syscalls).

showsigs.c

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

void sig_handler(int signo)
{
    printf("Yo yo : %s\n", strsignal(signo));
}

int main(int argc, char const *argv[])
{
    printf("pid : %d\n", getpid());

    for (int signo = 0; signo < 32; signo++)
    {
        signal(signo, sig_handler);
        printf("%s handled\n", strsignal(signo));
    }

    while (true)
        pause();

    return (EXIT_SUCCESS);
}