Linux Access Control Lists library (libacl, -lacl).  The function
frees  any  releasable  memory  currently allocated by to the ACL
data object identified by The argument may identify  an  ACL,  an
ACL  entry  qualifier,  or a pointer to a string allocated by the
function.  If any of the following conditions occur, the function
returns the value and and sets to the  corresponding  value:  The
value  of  the  argument  is  invalid.  IEEE Std 1003.1e draft 17
(“POSIX.1e”, abandoned) Derived from  the  FreeBSD  manual  pages
written by and adapted for Linux by