gistfile1.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

int main(int argc, char **argv) {
  int fd1 = open("./services", O_RDONLY);
  int fd2 = open("./services", O_RDONLY);

  printf("fd1: %d\nfd2: %d\n", fd1, fd2);
  close(fd1);
  close(fd2);
  return 0;
}