.\"-
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.Dd January 20, 2021
.Dt ACL_CMP_NP 3
.Os
.Sh NAME
.Nm acl_cmp
.Nd compare between two ACLs
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/types.h
.In sys/acl.h
.Ft int
.Fn acl_cmp_np "acl_t acl1" "acl_t acl2"
.Sh DESCRIPTION
The
.Fn acl_cmp_np
function is a non-portable call that checks if ACLs pointed to by
.Va acl1
and
.Va acl2
are equivalent.
The two ACLs are considered equal when they contain the same
entries with matching tag types, qualifiers and permissions.
.Sh RETURN VALUES
Upon successful completion, this function returns 0 if the given ACLs are
equivalent and 1 if they differ.
Otherwise, the value -1 is returned, and
.Va errno
indicates the error.
.Sh ERRORS
If any of the following conditions occur, the
.Fn acl_cmp_np
function shall return a value of
.Va -1
and set
.Va errno
to the corresponding value:
.Bl -tag -width Er
.It Bq Er EINVAL
Either first or second argument does not point to a valid ACL.
.Sh SEE ALSO
.Xr acl 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 ,
and development continues.
.Sh AUTHORS
.An Gleb Popov