Linux Access Control Lists library (libacl, -lacl).  The function
returns  a  pointer to a copy of the ACL pointed to by This func‐
tion may cause memory to be allocated.  The  caller  should  free
any releasable memory, when the new ACL is no longer required, by
calling  with  the  returned by as an argument.  On success, this
function returns a pointer to the working storage.  On  error,  a
value  of  is  returned, and is set appropriately.  If any of the
following conditions occur, the function returns a value  of  and
sets  to  the  corresponding  value:  The argument is not a valid
pointer to an ACL.  The to be returned requires more memory  than
is  allowed  by  the hardware or system‐imposed memory management
constraints.  IEEE Std 1003.1e draft 17  (“POSIX.1e”,  abandoned)
Derived  from the FreeBSD manual pages written by and adapted for
Linux by