FILENAME_MAX
if ((end-old_end) > FILENAME_MAX) /* GRR: proper constant? */
*(end = old_end + FILENAME_MAX) = '\0';
if ((end-old_end) > FILENAME_MAX) /* GRR: proper constant? */
*(end = old_end + FILENAME_MAX) = '\0';
# if FILENAME_MAX > 255
# define PATH_MAX FILENAME_MAX /* used like PATH_MAX on some systems */