Linux Access Control Lists library (libacl, -lacl).  The function
sets  the  tag type of the ACL entry indicated by the argument to
the value of the argument Any ACL entry descriptors that refer to
the entry referred to by continue to refer to that entry.  If any
of the following conditions occur, the function returns and  sets
to  the corresponding value: The argument is not a valid descrip‐
tor for an ACL entry.  The argument is  not  a  valid  tag  type.
IEEE  Std  1003.1e  draft 17 (“POSIX.1e”, abandoned) Derived from
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