1: libc {
    2:   GLIBC_2.0 {
    3:     # e*
    4:     endgrent;
    5: 
    6:     # f*
    7:     fgetgrent; fgetgrent_r;
    8: 
    9:     # g*
   10:     getgrent; getgrent_r; getgrgid; getgrgid_r; getgrnam; getgrnam_r;
   11:     getgroups;
   12: 
   13:     # i*
   14:     initgroups;
   15: 
   16:     # s*
   17:     setgrent; setgroups;
   18:   }
   19:   GLIBC_2.1 {
   20:     # p*
   21:     putgrent;
   22:   }
   23:   GLIBC_2.1.2 {
   24:     # g*
   25:     getgrent_r; getgrgid_r; getgrnam_r;
   26:   }
   27:   GLIBC_2.2.4 {
   28:     # g*
   29:     getgrouplist;
   30:   }
   31: }