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142 lines
4.1 KiB
Groff
142 lines
4.1 KiB
Groff
.\"-
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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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.Dd April 27, 2016
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.Dt RMEXTATTR 8
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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 fhqsx
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.Ar attrnamespace
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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 attrnamespace
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.Ar filename ...
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.Nm rmextattr
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.Op Fl fhq
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.Ar attrnamespace
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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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.Ar attrnamespace
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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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.Fl i
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.Op Fl fhnq
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.Ar attrnamespace
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.Ar attrname
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.Ar filename ...
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.Sh DESCRIPTION
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These
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utilities
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are user tools to manipulate the named extended attributes on files and
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directories.
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The
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.Ar attrnamespace
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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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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
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(From stdin.)
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Read attribute data from stdin instead of as an argument.
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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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When given twice, print only the attribute value, with no trailing newline.
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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 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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md5 -q /boot/kernel/kernel | setextattr -i system md5 /boot/kernel/kernel
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getextattr system md5 /boot/kernel/kernel
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getextattr -qq system md5 /boot/kernel/kernel | od -x
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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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.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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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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.Sh AUTHORS
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.An Robert N M Watson
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.An Poul-Henning Kamp
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