#include <stdio.h>
#include <syslog.h>
#include <fcntl.h>
#include <sys/resource.h>
#include <signal.h>
#include <sys/stat.h>
#include <unistd.h>

void daemonize();

int main(int argc, char **argv)
{
    daemonize();

    while(1) {
       sleep(5);
       daemonize();
    }
    return 1;
}


void sig_handler(int signo)
{
   return;
}

void daemonize()
{
     struct sigaction term_sig; /* for SIGTERM, SIGINT, SIGHUP, SIGUSR1 and SIGUSR2 */
     pid_t pid;
     
     
     /* fork new child */
     if ( (pid = fork()) > 0 )
     {
         exit(0); /* parent must die */
     }
     else if ( pid < 0 )
          fprintf(stderr, "fork failed\n");

     setsid(); /* new session started */
     
     chdir("/"); /* our root is / */
          
     close(STDIN_FILENO); /* close stdin */
     close(STDERR_FILENO); /* close stderr and stdout if close_fd is 1 */
     close(STDOUT_FILENO);
     
     /* structs for signal handling */
     memset(&term_sig, 0, sizeof(term_sig));
     
     term_sig.sa_handler = &sig_handler; /* default signal handler function */

     sigaction(SIGTERM, &term_sig, NULL);
     sigaction(SIGINT, &term_sig, NULL);
     sigaction(SIGHUP, &term_sig, NULL);
     sigaction(SIGUSR1, &term_sig, NULL);
     sigaction(SIGUSR2, &term_sig, NULL);
     
     return;
}