1.\"- 2.\" Copyright (c) 2000, 2001 Robert N. M. Watson 3.\" Copyright (c) 2002 Networks Associates Technology, Inc. 4.\" All rights reserved. 5.\" 6.\" This software was developed for the FreeBSD Project by Poul-Henning 7.\" Kamp and Network Associates Laboratories, the Security Research Division 8.\" of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 9.\" ("CBOSS"), as part of the DARPA CHATS research program 10.\" 11.\" Redistribution and use in source and binary forms, with or without 12.\" modification, are permitted provided that the following conditions 13.\" are met: 14.\" 1. Redistributions of source code must retain the above copyright 15.\" notice, this list of conditions and the following disclaimer. 16.\" 2. Redistributions in binary form must reproduce the above copyright 17.\" notice, this list of conditions and the following disclaimer in the 18.\" documentation and/or other materials provided with the distribution. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" $FreeBSD$ 33.\" 34.Dd April 27, 2016 35.Dt RMEXTATTR 8 36.Os 37.Sh NAME 38.Nm getextattr , 39.Nm lsextattr , 40.Nm rmextattr , 41.Nm setextattr 42.Nd manipulate extended attributes 43.Sh SYNOPSIS 44.Nm getextattr 45.Op Fl fhqsx 46.Ar attrnamespace 47.Ar attrname 48.Ar filename ... 49.Nm lsextattr 50.Op Fl fhq 51.Ar attrnamespace 52.Ar filename ... 53.Nm rmextattr 54.Op Fl fhq 55.Ar attrnamespace 56.Ar attrname 57.Ar filename ... 58.Nm setextattr 59.Op Fl fhnq 60.Ar attrnamespace 61.Ar attrname 62.Ar attrvalue 63.Ar filename ... 64.Nm setextattr 65.Fl i 66.Op Fl fhnq 67.Ar attrnamespace 68.Ar attrname 69.Ar filename ... 70.Sh DESCRIPTION 71These 72utilities 73are user tools to manipulate the named extended attributes on files and 74directories. 75The 76.Ar attrnamespace 77argument should be the namespace of the attribute to retrieve: legal 78values are 79.Cm user 80and 81.Cm system . 82The 83.Ar attrname 84argument should be the name of the attribute, 85.Ar filename 86the name of the target file or directory, 87.Ar attrvalue 88a string to store in the attribute. 89.Pp 90The following options are available: 91.Bl -tag -width indent 92.It Fl f 93(Force.) 94Ignore errors on individual filenames and continue with 95the remaining arguments. 96.It Fl h 97(No follow.) 98If the file is a symbolic link, perform the operation on the 99link itself rather than the file that the link points to. 100.It Fl i 101(From stdin.) 102Read attribute data from stdin instead of as an argument. 103.It Fl n 104.Dv ( NUL Ns 105-terminate.) 106.Dv NUL Ns 107-terminate the extent content written out. 108.It Fl q 109(Quiet.) 110Do not print out the pathname and suppress error messages. 111When given twice, print only the attribute value, with no trailing newline. 112.It Fl s 113(Stringify.) 114Escape nonprinting characters and put quotes around the output. 115.It Fl x 116(Hex.) 117Print the output in hexadecimal. 118.El 119.Sh EXAMPLES 120.Bd -literal 121setextattr system md5 `md5 -q /boot/kernel/kernel` /boot/kernel/kernel 122md5 -q /boot/kernel/kernel | setextattr -i system md5 /boot/kernel/kernel 123getextattr system md5 /boot/kernel/kernel 124getextattr -qq system md5 /boot/kernel/kernel | od -x 125lsextattr system /boot/kernel/kernel 126rmextattr system md5 /boot/kernel/kernel 127.Ed 128.Sh SEE ALSO 129.Xr extattr 2 , 130.Xr extattr 3 , 131.Xr extattrctl 8 , 132.Xr extattr 9 133.Sh HISTORY 134Extended attribute support was developed as part of the 135.Tn TrustedBSD 136Project, 137and introduced in 138.Fx 5.0 . 139It was developed to support security extensions requiring additional labels 140to be associated with each file or directory. 141.Sh AUTHORS 142.An Robert N M Watson 143.An Poul-Henning Kamp 144