13 #include <bits/alltypes.h>
23 struct group *getgrgid(gid_t);
24 struct group *getgrnam(const char *);
26 int getgrgid_r(gid_t, struct group *, char *, size_t, struct group **);
27 int getgrnam_r(const char *, struct group *, char *, size_t, struct group **);
29 struct group *getgrent(void);
33 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
34 int getgrouplist(const char *, gid_t, gid_t *, int *);
35 int setgroups(size_t, const gid_t *);
36 int initgroups(const char *, gid_t);