These
utilities
are user tools to manipulate the named extended attributes on files and
directories.
The
attrnamespace
argument should be the namespace of the attribute to retrieve: legal
values are
user
and
system
The
attrname
argument should be the name of the attribute,
filename
the name of the target file or directory,
attrvalue
a string to store in the attribute.
The following options are available:
-f
(Force.)
Ignore errors on individual filenames and continue with
the remaining arguments.
-h
(No follow.)
If the file is a symbolic link, perform the operation on the
link itself rather than the file that the link points to.
-n
( NUL -terminate.)NUL -terminate the extent content written out.
-q
(Quiet.)
Do not print out the pathname and suppress error messages.
-s
(Stringify.)
Escape nonprinting characters and put quotes around the output.
-x
(Hex.)
Print the output in hexadecimal.
EXAMPLES
setextattr system md5 `md5 -q /boot/kernel/kernel` /boot/kernel/kernel
getextattr system md5 /boot/kernel/kernel
lsextattr system /boot/kernel/kernel
rmextattr system md5 /boot/kernel/kernel
Extended attribute support was developed as part of the
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.
AUTHORS
An Robert N M Watson
An Poul-Henning Kamp
BUGS
The
setextattr
utility can only be used to set attributes to strings.
