char *fn_tilde_expand (const char *fn);
char *fn_search_path (const char *base_name, const char *path,
const char *prefix);
char *fn_normalize (const char *fn);
char *fn_tilde_expand (const char *fn);
char *fn_search_path (const char *base_name, const char *path,
const char *prefix);
char *fn_normalize (const char *fn);