mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
101 lines
3.3 KiB
Groff
101 lines
3.3 KiB
Groff
.\"
|
|
.\" Copyright (c) 2001 Dima Dorfman <dd@FreeBSD.org>
|
|
.\" 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 June 24, 2001
|
|
.Dt EXTATTR 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm extattr_namespace_to_string ,
|
|
.Nm extattr_string_to_namespace
|
|
.Nd convert an extended attribute namespace identifier to a string and
|
|
vice versa
|
|
.Sh LIBRARY
|
|
.Lb libutil
|
|
.Sh SYNOPSIS
|
|
.In sys/extattr.h
|
|
.In libutil.h
|
|
.Ft int
|
|
.Fn extattr_namespace_to_string "int attrnamespace" "char **string"
|
|
.Ft int
|
|
.Fn extattr_string_to_namespace "const char *string" "int *attrnamespace"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn extattr_namespace_to_string
|
|
function converts a VFS extended attribute identifier to a human-readable
|
|
string;
|
|
the
|
|
.Fn extattr_string_to_namespace
|
|
function undoes the aforementioned operation,
|
|
and converts a human-readable string representing a namespace to a
|
|
namespace identifier.
|
|
Although a filesystem may implement arbitrary namespaces,
|
|
these functions only support the
|
|
.Dv EXTATTR_NAMESPACE_USER
|
|
.Pq Dq user
|
|
and
|
|
.Dv EXTATTR_NAMESPACE_SYSTEM
|
|
.Pq Dq system
|
|
namespaces,
|
|
which are defined in
|
|
.Xr extattr 9 .
|
|
.Pp
|
|
These functions are meant to be used in error reporting and other
|
|
interactive tasks.
|
|
For example,
|
|
instead of printing the integer identifying an extended attribute in
|
|
an error message,
|
|
a program might use
|
|
.Fn extattr_namespace_to_string
|
|
to obtain a human-readable representation.
|
|
Likewise,
|
|
instead of requiring a user to enter the integer representing a namespace,
|
|
an interactive program might ask for a name and use
|
|
.Fn extattr_string_to_namespace
|
|
to get the desired identifier.
|
|
.Sh RETURN VALUES
|
|
If any of the calls are unsuccessful, the value \-1 is returned
|
|
and the global variable
|
|
.Va errno
|
|
is set to indicate the error.
|
|
.Sh ERRORS
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
The requested namespace could not be identified.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr extattr 2 ,
|
|
.Xr getextattr 8 ,
|
|
.Xr setextattr 8 ,
|
|
.Xr extattr 9
|
|
.Sh HISTORY
|
|
Extended attribute support was developed as part of the
|
|
.Tn TrustedBSD
|
|
Project, and introduced in
|
|
.Fx 5.0 .
|
|
It was developed to support security extensions requiring additional labels
|
|
to be associated with each file or directory.
|