NAME

       acl_copy_ext — copy an ACL from internal to external representation

LIBRARY

       Linux Access Control Lists library (libacl, -lacl).

SYNOPSIS

       #include <sys/types.h>
       #include <sys/acl.h>

       ssize_t
       acl_copy_ext(void *buf_p, acl_t acl, ssize_t size);

DESCRIPTION

       The  acl_copy_ext()  function  copies  the  ACL  pointed  to by acl from system-managed space to the user
       managed space pointed to by buf_p.  The size parameter represents the size in bytes of the buffer pointed
       to by buf_p.  The format of the ACL placed in the buffer pointed to by buf_p is a contiguous,  persistent
       data  item,  the  format of which is unspecified.  It is the responsibility of the invoker to allocate an
       area large enough to hold the copied ACL. The size of the exportable, contiguous, persistent form of  the
       ACL may be obtained by invoking the acl_size() function.

       Any  ACL entry descriptors that refer to an entry in the ACL referenced by acl continue to refer to those
       entries. Any existing ACL pointers that refer to the ACL referenced by acl continue to refer to the ACL.

RETURN VALUE

       Upon success, this function returns the number of bytes placed in the buffer pointed  to  by  buf_p.   On
       error, a value of (ssize_t)-1 is returned and errno is set appropriately.

ERRORS

       If  any of the following conditions occur, the acl_copy_ext() function returns a value of (ssize_t)-1 and
       sets errno to the corresponding value:

       [EINVAL]           The size parameter is zero or negative.

                          The argument acl is not a valid pointer to an ACL.

                          The ACL referenced by acl contains one or more improperly formed ACL entries,  or  for
                          some other reason cannot be translated into the external form of an ACL.

       [ERANGE]           The size parameter is greater than zero but smaller than the length of the contiguous,
                          persistent form of the ACL.

STANDARDS

       IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)

SEE ALSO

       acl_copy_int(3), acl_size(3), acl(5)

AUTHOR

       Derived from the FreeBSD manual pages written by Robert N M Watson <rwatson@FreeBSD.org>, and adapted for
       Linux by Andreas Gruenbacher <andreas.gruenbacher@gmail.com>.

Linux ACL                                        March 23, 2002                                  ACL_COPY_EXT(3)