Method chmod

fs/subfs.cpp:159–163

            return underlayfs->unlink(path);
        }
        virtual int chmod(const char *path, mode_t mode) override
        {
            PathCat __(this, path);
            return underlayfs->chmod(path, mode);
        }
        virtual int chown(const char *path, uid_t owner, gid_t group) override
        {
            PathCat __(this, path);