CentOS 7.0 - man page for acl_size (centos section 3)
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ACL_SIZE(3) BSD Library Functions Manual ACL_SIZE(3)
acl_size -- get the size of the external representation of an ACL
Linux Access Control Lists library (libacl, -lacl).
The acl_size() function return the size, in bytes, of the buffer required to hold the
exportable, contiguous, persistent form of the ACL pointed to by the argument acl, when con-
verted by acl_copy_ext().
Any existing ACL entry descriptors that refer to entries in acl continue to refer to the
same entries. Any existing ACL pointers that refer to the ACL referred to by acl continue to
refer to the ACL. The order of ACL entries within acl remains unchanged.
On success, the acl_size() function returns the size in bytes of the contiguous, persistent
form of the ACL. On error, a value of (ssize_t)-1 is returned and errno is set appropri-
If any of the following conditions occur, the acl_size() 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.
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 <email@example.com>.
Linux ACL March 23, 2002 Linux ACL
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