grp/fgetgrent.os grp/initgroups.os grp/setgroups.os grp/getgrent.os grp/getgrgid.os grp/getgrnam.os grp/putgrent.os grp/getgrent_r.os grp/getgrgid_r.os grp/getgrnam_r.os grp/fgetgrent_r.os grp/grp-merge.os