// Compile with gcc tce-notify.c -o tce-notify
#define _GNU_SOURCE     /* needed to get the defines */
#include <fcntl.h>      /* in glibc 2.2 this has the needed
				   values defined */
#include <signal.h>
#include <stdio.h>
#include <unistd.h>

static volatile int event_fd;
static volatile int event_sig;
static volatile void *event_data;

static void handler(int sig, siginfo_t *si, void *data)
{

  event_fd = si->si_fd;
  event_sig = sig;
  event_data = data;
}

int main(void)
{
  struct sigaction act;
  int fd;

  act.sa_sigaction = handler;
  sigemptyset(&act.sa_mask);
  act.sa_flags = SA_SIGINFO;
  sigaction(SIGRTMIN + 1, &act, NULL);

  fd = open("/usr/local/tce.installed", O_RDONLY);
  fcntl(fd, F_SETSIG, SIGRTMIN + 1);
  fcntl(fd, F_NOTIFY, DN_ACCESS|DN_MODIFY|DN_CREATE|DN_RENAME|DN_DELETE|DN_ATTRIB|DN_MULTISHOT);

  while (1) {
    pause();
    system("/sbin/depmod -a 2>/dev/null");
    system("/sbin/udevtrigger");
    system("/sbin/ldconfig 2>/dev/null");
    printf("System updated!");
  }
}