if (fs_name_is_correct ("/")) ...                                              /* 1 */

if (fs_name_is_correct ("/etc")) ...                                           /* 1 */

if (fs_name_is_correct ("/etc/hosts")) ...                                     /* 1 */

if (fs_name_is_correct ("./text.txt")) ...                                     /* 1 */

if (fs_name_is_correct ("./random-file-name.txt")) ...                         /* 0 */

if (fs_name_is_correct ("./random/directory/name")) ...                        /* 0 */

if (fs_name_is_correct ("")) ...                                               /* 0 */

if (fs_name_is_correct ("?*><")) ...                                           /* 0 */