int para_open(const char *path, int flags, mode_t mode);
int para_opendir(const char *dirname, DIR **dir, int *cwd);
int para_mkdir(const char *path, mode_t mode);
int para_open(const char *path, int flags, mode_t mode);
int para_opendir(const char *dirname, DIR **dir, int *cwd);
int para_mkdir(const char *path, mode_t mode);