af_chowner, af_chauthor, af_chmod - AtFS protection handling

af_chowner does not work.

AtFS-1.71                                   Fri Jun 25 14:33:16 1993                               af_protect(3)

af_chowner  and  af_chauthor  modify  the  owner  and author attribute of an ASO.  Only the superuser may
       change the owner of an object history.  The author attribute of an ASO can only be changed by it's owner.
       The Af_user structure has the following form

              typedef struct {
                   char af_username[MAXUSERNAMELEN];
                   char af_userhost[MAXHOSTNAMELEN];
                   char af_userdomain[MAXDOMAIN+1];
                   } Af_user;

       af_chmod changes the mode of an ASO.  See chmod(3) for further details.

       Upon error, -1 is returned and af_errno is set to the corresponding error number.

       af_chowner, af_chauthor, af_chmod - AtFS protection handling

       chown (2), chmod (2)

       #include <atfs.h>

       int af_chowner (Af_key *aso, Af_user *owner)

       int af_chauthor (Af_key *aso, Af_user *author)

       int af_chmod (Af_key *aso, int mode)