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


SYNOPSIS

     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 pa­
     rameter 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 con­
     tiguous, 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 successful completion, this function returns the number of bytes
     placed in the buffer pointed to by buf_p. Otherwise, a value of
     (ssize_t)-1 is returned and errno is set to indicate the error.


ERRORS

     If any of the following conditions occur, the acl_copy_ext() function re­
     turns 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
     <a.gruenbacher@computer.org>.

 Linux ACL                      March 23, 2002                               1

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