determine whether ACL is trivial
Standard C Library (libc, -lc)
acl_is_trivial() function determines whether the ACL
pointed to by the argument acl is trivial. Upon
successful completion, the location referred to by the argument
trivialp will be set to 1, if the ACL
aclp points to is trivial, or 0 if it's not.
ACL is trivial if it can be fully expressed as a file mode without
losing any access rules. For POSIX.1e ACLs, ACL is trivial if it has the
three required entries, one for owner, one for owning group, and one for
other. For NFSv4 ACLs, ACL is trivial if it is identical to the ACL
Files that have non-trivial ACL have a plus sign appended after mode bits in
"ls -l" output.
acl_get_tag_type() function returns the
value 0 if successful; otherwise the value -1 is returned and
the global variable errno is set to indicate the error.
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. The
acl_is_trivial_np() function was added in