NAME
getextattr,
lsextattr,
rmextattr,
setextattr —
manipulate extended attributes
SYNOPSIS
getextattr |
[-fhq]
[-s | -x |
-v style]
[namespace]
attrname filename ... |
lsextattr |
[-fhq]
namespace filename ... |
rmextattr |
[-fhq]
[namespace]
attrname filename ... |
setextattr |
[-fhnq]
[namespace]
attrname attrvalue
filename ... |
setextattr |
[-fhnq] -i
valuefile
[namespace]
attrname filename ... |
DESCRIPTION
These utilities are user tools to manipulate the named extended attributes on
files and directories.
The
namespace argument should be the namespace of the
attribute to retrieve: legal values are
user and
system. For all operations except
lsextattr, the namespace argument may be omitted if the
attribute name is namespace prefixed, like in
user.test. In
that later case, the
user namespace prefix obviously selects
user namespace.
system,
security, and
trusted namespace prefixes
select the
system namespace.
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.
-
-
- -i
valuefile
- (Input file.) Read the attribute value from file
valuefile. Use this flag in order to set a binary
value for an attribute.
-
-
- -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.
-
-
- -v
style
- (Visual.) Process the attribute value through
vis(3), using
style. Valid values for style
are:
-
-
- default
- Use default
vis(3) encoding.
-
-
- c
- Use C-style backslash sequences, like in
vis -c.
-
-
- http
- Use URI encoding from RFC 1808, like in
vis -h.
-
-
- octal
- Display in octal, like in vis
-o.
-
-
- vis
- Alias for default.
-
-
- cstyle
- Alias for c.
-
-
- httpstyle
- Alias for http.
-
-
- -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
Examples omitting namespace (and attribute value) argument:
setextattr -i valuefile trusted.gfid /export/wd3a
getextattr -x trusted.gfid /export/wd3a
SEE ALSO
extattr(3),
extattrctl(8),
extattr(9)
HISTORY
Extended attribute support was developed as part of the TrustedBSD Project, and
introduced in
FreeBSD 5.0 and
NetBSD
3.0. It was developed to support security extensions requiring
additional labels to be associated with each file or directory.
Extended attribute support was resurrected and made more usable in
NetBSD 5.2.
AUTHORS
Robert N M Watson
Poul-Henning Kamp
Emmanuel Dreyfus