//--------------------------------------------------------------------
// alarma.c
//--------------------------------------------------------------------

#include <signal.h> // signal SIGALRM
#include <stdio.h>  // printf
#include <unistd.h> // alarm pause

//--------------------------------------------------------------------

int ESPERA = 1; // segundos

//--------------------------------------------------------------------

void atrapar_alarma(int i) // manejador de señal
{
    printf("¡¡¡ALARMA!!!\n");
}

//--------------------------------------------------------------------

int main()
{
    signal(SIGALRM, atrapar_alarma);
    for (;;)
    {
        alarm(ESPERA);
        pause();
    }
}

//--------------------------------------------------------------------