Linux Access Control Lists library (libacl, -lacl).  The function
translates  the  ACL pointed to by the argument into a terminated
character string.  If the pointer is not then  the  function  re‐
turns  the length of the string (not including the terminator) in
the location pointed to by The format of the text string returned
by is the long text form defined in The ACL referred to by is not
changed.  This function allocates any memory necessary to contain
the string and returns a  pointer  to  the  string.   The  caller
should  free  any  releasable  memory,  when the new string is no
longer required, by calling with the returned by as an  argument.
On success, this function returns a pointer to the long text form
of  the ACL.  On error, a value of is returned, and is set appro‐
priately.  If any of the following conditions occur, the function
returns a value of and sets to the corresponding value: The argu‐
ment is not a valid pointer to an ACL.   The  ACL  referenced  by
contains  one  or more improperly formed ACL entries, or for some
other reason cannot be translated into a text  form  of  an  ACL.
The  character string to be returned requires more memory than is
allowed by the hardware or system‐imposed memory management  con‐
straints.   IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned) De‐
rived from the FreeBSD manual pages written by  and  adapted  for
Linux by