add_fn
extern int file_reload(mnt_map *, char *, add_fn *);
extern int nis_reload(mnt_map *, char *, add_fn *);
extern int union_reload(mnt_map *, char *, add_fn *);
static int error_reload(mnt_map *, char *, add_fn *);
error_reload(mnt_map *m, char *map, add_fn *fn)
typedef int reload_fn(mnt_map *, char *, add_fn *);