extern int lf_check_file(int, uschar *, int, int, uid_t *, gid_t *,
const char *, uschar **);
extern uschar *lf_quote(uschar *, uschar *, int, uschar *, int *, int *);
extern int lf_check_file(int, uschar *, int, int, uid_t *, gid_t *,
const char *, uschar **);
extern uschar *lf_quote(uschar *, uschar *, int, uschar *, int *, int *);