2 extern int gr_close (void);
3 extern const struct group *gr_locate (const char *);
4 extern const struct group *gr_locate_gid (gid_t gid);
5 extern int gr_lock (void);
6 extern int gr_name (const char *);
7 extern const struct group *gr_next (void);
8 extern int gr_open (int);
9 extern int gr_remove (const char *);
10 extern int gr_rewind (void);
11 extern int gr_unlock (void);
12 extern int gr_update (const struct group *);
13 extern int gr_sort (void);