| ACL_COPY_EXT(3) | Library Functions Manual | ACL_COPY_EXT(3) |
acl_copy_ext —
copy an ACL from internal to external
representation
Linux Access Control Lists library (libacl, -lacl).
#include
<sys/types.h>
#include <sys/acl.h>
ssize_t
acl_copy_ext(void
*buf_p, acl_t acl,
ssize_t size);
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.
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.
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 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]IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)
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⟩.
| March 23, 2002 | Linux ACL |