};
char *extract_trimmed_name (const STRUCT_UTMP *ut);
-int read_utmp (const char *filename, size_t *n_entries, STRUCT_UTMP **utmp_buf,
+int read_utmp (char const *file, size_t *n_entries, STRUCT_UTMP **utmp_buf,
int options);
#endif /* __READUTMP_H__ */