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

#define SIZE 2048

int main(int argc, char *argv[]){
  int ret;
  char buf[SIZE];
  mode_t perms = S_IRUSR | S_IWUSR | S_IXUSR;

  // Get working directory
  if( getcwd(buf,SIZE) == NULL ){
    perror("Can't get working directory");
    exit(1);
  }
  printf("Working directory: %s\n",buf);

  // Create a directory
  if( mkdir("tmpdir",perms) == -1 ){
    perror("Couldn't create directory");
    exit(1);
  }
  printf("Made tmpdir\n");

  // Change to new directory
  if( chdir("tmpdir") == -1 ){
    perror("Couldn't change directory");
    exit(1);
  }
  if( getcwd(buf,SIZE) == NULL ){
    perror("Can't get working directory");
    exit(1);
  }
  printf("Working directory: %s\n",buf);

  // Change back
  if( chdir("..") == -1 ){
    perror("Couldn't change back");
    exit(1);
  }

  return 0;
}