std::string formatCstr(const char *cstr);
int files_compare(int fd1, int fd2);
void mkdirSafe(const std::string &path, mode_t mode);
+void mktreeSafe(const std::string &path, mode_t mode);
void creatSafe(const std::string &path, mode_t mode);
void symlinkSafe(const std::string &targetPath, const std::string &linkPath);
void removeDir(const std::string &path);