Catching signal inside its own handler

#include<stdio.h>
#include<signal.h>

void handler(int signo)
{
    printf("Into handler\n");
    while(1);
}
int main()
{
    struct sigaction act;
    act.sa_handler = handler;
    act.sa_flags = 0;
    sigemptyset(& act.sa_mask);
    sigaction(SIGINT, &act, NULL);
    while(1);
    return 0;
}

After catching the KeyboardInterrupt once, when I press "Ctrl+C" again, SIGINT is not handled... I intend that "Into handler" should be printed each time I press "Ctrl+C".

I want to catch SIGINT inside the "SIGINT handler()" itself..