.\"-
.\" Copyright (c) 2008, 2009 Edward Tomasz Napierala
.\"
.\" This software was developed by Robert Watson for the TrustedBSD Project.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd June 19, 2023
.Dt ACL_IS_TRIVIAL_NP 3
.Os
.Sh NAME
.Nm acl_is_trivial_np
.Nd determine whether ACL is trivial
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/types.h
.In sys/acl.h
.Ft int
.Fn acl_is_trivial_np "const acl_t aclp" "int *trivialp"
.Sh DESCRIPTION
The
.Fn acl_is_trivial_np
function determines whether the ACL pointed to by the argument
.Va acl
is trivial.
Upon successful completion, the location referred to by the argument
.Fa trivialp
will be set to 1, if the ACL
.Fa aclp
points to is trivial, or 0 if it's not.
.Pp
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 generated by
.Xr acl_strip_np 3 .
Files that have non-trivial ACL have a plus sign appended after mode bits
in "ls -l" output.
.Sh RETURN VALUES
.Rv -std acl_is_trivial_np
.Sh SEE ALSO
.Xr acl 3 ,
.Xr acl_strip_np 3 ,
.Xr posix1e 3
.Sh STANDARDS
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
.Fx
POSIX.1e implementation
page for more information.
.Sh HISTORY
POSIX.1e support was introduced in
.Fx 4.0 .
The
.Fn acl_is_trivial_np
function was added in
.Fx 8.0 .
.Sh AUTHORS
.An Edward Tomasz Napierala Aq Mt trasz@FreeBSD.org