duplicate an ACL
Standard C Library (libc, -lc)
acl_dup() function returns a pointer to a copy of
the ACL pointed to by the argument acl.
This function may cause memory to be allocated. The caller should
free any releasable memory, when the new ACL is no longer required, by
with the (void*)acl_t as an argument.
Any existing ACL pointers that refer to the ACL referred to by
acl shall continue to refer to the ACL.
FreeBSD's support for POSIX.1e interfaces and features
is still under development at this time.
Upon successful completion, this function shall return a pointer to the
duplicate ACL. Otherwise, a value of (acl_t)NULL shall
be returned, and errno shall be set to indicate the
If any of the following conditions occur, the
function shall return a value of (acl_t)NULL and set
errno to the corresponding value:
POSIX.1e is described in IEEE POSIX.1e draft 17. Discussion of the draft
continues on the cross-platform POSIX.1e implementation mailing list. To join
this list, see the FreeBSD POSIX.1e implementation
page for more information.
POSIX.1e support was introduced in FreeBSD 4.0, and
- Argument acl does not point to a valid ACL.
- The acl_t to be returned requires more memory than
is allowed by the hardware or system-imposed memory management