/* Header for the functions that are shared by the lookups */
-extern int lf_check_file(int, uschar *, int, int, uid_t *, gid_t *,
+extern int lf_check_file(int, const uschar *, int, int, uid_t *, gid_t *,
const char *, uschar **);
extern gstring *lf_quote(uschar *, uschar *, int, gstring *);
extern int lf_sqlperform(const uschar *, const uschar *, const uschar *,