208 lines
5.2 KiB
Groff
208 lines
5.2 KiB
Groff
.\" $NetBSD: getextattr.1,v 1.5 2011/07/14 22:14:03 wiz Exp $
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.\"
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.\"-
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.\" Copyright (c) 2000, 2001 Robert N. M. Watson
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.\" Copyright (c) 2002 Networks Associates Technology, Inc.
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.\" All rights reserved.
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.\"
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.\" This software was developed for the FreeBSD Project by Poul-Henning
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.\" Kamp and Network Associates Laboratories, the Security Research Division
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.\" of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
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.\" ("CBOSS"), as part of the DARPA CHATS research program
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD: src/usr.sbin/extattr/rmextattr.8,v 1.4 2003/02/24 22:53:25 ru Exp $
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.\"
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.Dd January 2, 2005
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.Dt GETEXTATTR 1
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.Os
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.Sh NAME
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.Nm getextattr ,
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.Nm lsextattr ,
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.Nm rmextattr ,
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.Nm setextattr
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.Nd manipulate extended attributes
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.Sh SYNOPSIS
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.Nm getextattr
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.Op Fl fhq
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.Op Fl s | Fl x | Fl v Ar style
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.Op Ar namespace
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.Ar attrname
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.Ar filename ...
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.Nm lsextattr
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.Op Fl fhq
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.Ar namespace
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.Ar filename ...
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.Nm rmextattr
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.Op Fl fhq
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.Op Ar namespace
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.Ar attrname
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.Ar filename ...
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.Nm setextattr
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.Op Fl fhnq
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.Op Ar namespace
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.Ar attrname
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.Ar attrvalue
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.Ar filename ...
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.Nm setextattr
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.Op Fl fhnq
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.Fl i Ar valuefile
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.Op Ar namespace
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.Ar attrname
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.Ar filename ...
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.Sh DESCRIPTION
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These utilities are user tools to manipulate the named extended
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attributes on files and directories.
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.Pp
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The
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.Ar namespace
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argument should be the namespace of the attribute to retrieve: legal
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values are
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.Cm user
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and
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.Cm system .
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For all operations except
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.Nm lsextattr ,
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the namespace argument may be omitted if the attribute name is namespace
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prefixed, like in
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.Cm user.test .
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In that later case, the
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.Cm user
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namespace prefix obviously selects
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.Cm user
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namespace.
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.Cm system ,
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.Cm security ,
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and
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.Cm trusted
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namespace prefixes select the
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.Cm system
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namespace.
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.Pp
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The
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.Ar attrname
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argument should be the name of the attribute,
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.Ar filename
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the name of the target file or directory,
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.Ar attrvalue
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a string to store in the attribute.
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.Pp
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The following options are available:
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.Bl -tag -width indent
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.It Fl f
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(Force.)
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Ignore errors on individual filenames and continue with
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the remaining arguments.
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.It Fl h
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(No follow.)
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If the file is a symbolic link, perform the operation on the
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link itself rather than the file that the link points to.
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.It Fl i Ar valuefile
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(Input file.)
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Read the attribute value from file
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.Ar valuefile .
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Use this flag in order to set a binary value for an attribute.
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.It Fl n
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.Dv ( NUL Ns
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-terminate.)
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.Dv NUL Ns
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-terminate the extent content written out.
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.It Fl q
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(Quiet.)
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Do not print out the pathname and suppress error messages.
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.It Fl s
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(Stringify.)
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Escape nonprinting characters and put quotes around the output.
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.It Fl v Ar style
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(Visual.)
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Process the attribute value through
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.Xr vis 3 ,
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using
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.Ar style .
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Valid values for
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.Ar style
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are:
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.Bl -tag -width indent
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.It Ar default
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Use default
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.Xr vis 3
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encoding.
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.It Ar c
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Use C-style backslash sequences, like in
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.Nm vis Fl c .
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.It Ar http
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Use URI encoding from RFC 1808, like in
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.Nm vis Fl h .
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.It Ar octal
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Display in octal, like in
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.Nm vis Fl o .
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.It Ar vis
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Alias for
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.Ar default .
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.It Ar cstyle
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Alias for
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.Ar c .
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.It Ar httpstyle
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Alias for
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.Ar http .
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.El
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.It Fl x
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(Hex.)
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Print the output in hexadecimal.
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.El
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.Sh EXAMPLES
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.Bd -literal
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setextattr system md5 `md5 -q /boot/kernel/kernel` /boot/kernel/kernel
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getextattr system md5 /boot/kernel/kernel
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lsextattr system /boot/kernel/kernel
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rmextattr system md5 /boot/kernel/kernel
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.Ed
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.Pp
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Examples omitting namespace (and attribute value) argument:
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.Bd -literal
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setextattr -i valuefile trusted.gfid /export/wd3a
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getextattr -x trusted.gfid /export/wd3a
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.Ed
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.Sh SEE ALSO
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.\" .Xr extattr 2 ,
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.Xr extattr 3 ,
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.Xr extattrctl 8 ,
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.Xr extattr 9
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.Sh HISTORY
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Extended attribute support was developed as part of the
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.Tn TrustedBSD
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Project,
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and introduced in
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.Fx 5.0
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and
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.Nx 3.0 .
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It was developed to support security extensions requiring additional labels
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to be associated with each file or directory.
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.Pp
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Extended attribute support was resurrected and made more usable in
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.Nx 5.2 .
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.Sh AUTHORS
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.An Robert N M Watson
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.An Poul-Henning Kamp
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.An Emmanuel Dreyfus
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