void checkDBExists(char *dbname, char *createdb){
  char command[100];
  sprintf(command, "psql -l | cut -d '|' -f1 | grep -w %s > .exist_test", dbname);
  system(command);
  FILE *test = fopen(".exist_test", "r");
  if (test != NULL){
    fseek(test, 0, SEEK_END);
    int length = ftell(test);
    if (length == 0){
      sprintf(createdb, "createdb %s 2>/dev/null", dbname);
      system(createdb);
      printf("\nDatabase \"%s\" was created.\n", dbname);
    }
  }
  fclose(test);
  system("rm .exist_test");
}