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-.\"-
-.\" Copyright (c) 2000 Robert N. M. Watson
-.\" All rights reserved.
-.\"
-.\" 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 January 28, 2000
-.Dt ACL_VALID 3
-.Os FreeBSD 4.0
-.Sh NAME
-.Nm acl_valid ,
-.Nm acl_valid_fd_np ,
-.Nm acl_valid_file_np
-.Nd Validate an ACL
-.Sh SYNOPSIS
-.Fd #include <sys/types.h>
-.Fd #include <sys/acl.h>
-.Ft int
-.Fn acl_valid "acl_t acl"
-.Ft int
-.Fn acl_valid_fd_np "int fd" "acl_type_t type" "acl_t acl"
-.Ft int
-.Fn acl_valid_file_np "const char *path_p" "acl_type_t type" "acl_t acl"
-.Sh DESCRIPTION
-These functions check that the ACL referred to by the argument
-.Va acl
-is valid. The POSIX.1e routine,
-.Fn acl_valid ,
-checks this validity only with POSIX.1e ACL semantics, and irrespective
-of the context in which the ACL is to be used. The non-portable forms,
-.Fn acl_valid_fd_np
-and
-.Fn acl_valid_file_np ,
-allow an ACL to be checked in the context of a specific acl type,
-.Va type ,
-and file system object. In environments where additional ACL types are
-supported than just POSIX.1e, this makes more sense.
-
-For POSIX.1e semantics, the checks include:
-.Bd -literal -offset indent
-The three required entries (ACL_USER_OBJ, ACL_GROUP_OBJ,
-and ACL_OTHER) shall exist exactly once in the ACL. If
-the ACL contains any ACL_USER, ACL_GROUP, or any other
-implementation-defined entries in the file group class
-then one ACL_MASK entry shall also be required. The ACL
-shall contain at most on ACL_MASK entry.
-
-The qualifier field shall be unique among all entries of
-the same POSIX.1e ACL facility defined tag type. The
-tag type field shall contain valid values including any
-implementation-defined values. Validation of the values
-of the qualifier field is implementation-defined.
-.Ed
-
-The POSIX.1e
-.Fn acl_valid
-function may reorder the ACL for the purposes of verification; the
-non-portable validation functions will not.
-.Sh IMPLEMENTATION NOTES
-FreeBSD's support for POSIX.1e interfaces and features is still under
-development at this time.
-.Sh RETURN VALUES
-Upon successful completion, the function shall return a value of zero.
-Otherwise, a value of -1 shall be returned and
-.Va errno
-shall be set to indicate the error.
-.Sh ERRORS
-If any of the following conditions occur, these functions shall return
--1 and set
-.Va errno
-to the corresponding value:
-.Bl -tag -width Er
-.It Bq Er EACCES
-Search permission is denied for a component of the path prefix, or the
-object exists and the process does not have appropriate access rights.
-.It Bq Er EBADF
-The
-.Va fd
-argument is not a valid file descriptor.
-.It Bq Er EINVAL
-Argument
-.Va acl
-does not point to a valid ACL.
-
-One or more of the required ACL entries is not present in
-.Va acl .
-
-The ACL contains entries that are not unique.
-
-The file system rejects the ACL based on fs-specific semantics issues.
-.It Bq Er ENAMETOOLONG
-A component of a pathname exceeded 255 characters, or an
-entire path name exceeded 1023 characters.
-.It Bq Er ENOENT
-The named object does not exist, or the
-.Va path_p
-argument points to an empty string.
-.It Bq Er ENOMEM
-Insufficient memory available to fulfill request.
-.It Bq Er EOPNOTSUPP
-The file system does not support ACL retrieval.
-.El
-.Sh SEE ALSO
-.Xr acl 3 ,
-.Xr acl_get 3 ,
-.Xr acl_init 3 ,
-.Xr acl_set 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 FreeBSD POSIX.1e implementation
-page for more information.
-.Sh HISTORY
-POSIX.1e support was introduced in
-.Fx 4.0 ,
-and development continues.
-.Sh AUTHORS
-.An Robert N M Watson
-.Sh BUGS
-These features are not yet fully implemented. In particular, the shipped
-version of UFS/FFS does not support storage of additional security labels,
-and so is unable to (easily) provide support for most of these features.
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