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

int main(void) {
  int fd = open("testfile", O_CREAT | O_RDWR, 0600);
  struct stat st1, st2;

  if (fd < 0) {
    perror("NA: open");
    exit(1);
  }
  if (close(fd) < 0) {
    perror("NA: close");
    exit(1);
  }

  unlink("testlink");
  if (stat("testfile", &st1) < 0) {
    perror("NA: first stat");
    exit(1);
  }
  sleep(5);

  if (chmod("testfile", 0660) < 0) {
    perror("NA: chmod");
    exit(1);
  }
  if (stat("testfile", &st2) < 0) {
    perror("NA: second stat");
    exit(1);
  }
  
  if (st2.st_ctim.tv_sec == st1.st_ctim.tv_sec) {
    printf("FAIL: chmod didn't update ctime\n");
  }
  else {
    printf("OK: chmod updated ctime\n");
  }
  st1 = st2;
  sleep(5);
  
  if (link("testfile", "testlink") < 0) {
    perror("NA: link failed");
    exit(1);
  }
  
  if (stat("testfile", &st2) < 0) {
    perror("NA: third stat");
    exit(1);
  }
  if (st2.st_ctim.tv_sec == st1.st_ctim.tv_sec) {
    printf("FAIL: link didn't update ctime\n");
    exit(1);
  }
  else {
    printf("OK: link updated ctime\n");
  }
  return 0;
}