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

void handler(int arg)
{
  switch( arg ) {
    case SIGHUP:
      printf("Hello, i am here!\n");
      break;
    case SIGTERM:
      printf("Hello, time to end!\n");
      exit(0);
      break;
  }
}

main()
{
  struct sigaction old, handle;

  handle.sa_handler = handler;
  handle.sa_flags   = 0;
  sigemptyset(&handle.sa_mask);
  sigaddset(&handle.sa_mask, SIGHUP);
  sigaddset(&handle.sa_mask, SIGTERM);

  sigaction(SIGHUP,  &handle, &old);
  sigaction(SIGTERM, &handle, &old);
  printf("my pid is %d\n", getpid());

  while(1)
    pause();
}