setfattr - set extended attributes of filesystem objects
setfattr [-h] -n name [-v value] pathname...
setfattr [-h] -x name pathname...
setfattr [-h] --restore=file
The setfattr command associates a new value with an
extended attribute name for each specified file.
- -n name,
--name=name
- Specifies the name of the extended attribute to set.
- -v value,
--value=value
- Specifies the new value of the extended attribute. There are three methods
available for encoding the value. If the given string is enclosed in
double quotes, the inner string is treated as text. In that case,
backslashes and double quotes have special meanings and need to be escaped
by a preceding backslash. Any control characters can be encoded as a
backslash followed by three digits as its ASCII code in octal. If the
given string begins with 0x or 0X, it expresses a hexadecimal number. If
the given string begins with 0s or 0S, base64 encoding is expected. Also
see the --encoding option of getfattr(1).
- -x name,
--remove=name
- Remove the named extended attribute entirely.
- -h,
--no-dereference
- Do not follow symlinks. If pathname is a symbolic link, it is not
followed, but is instead itself the inode being modified.
- --restore=file
- Restores extended attributes from file. The file must be in the format
generated by the getfattr command with the --dump option. If
a dash (-) is given as the file name, setfattr reads from
standard input.
- --raw
- Do not decode the attribute value. Can be used to set values obtained with
getfattr --only-values.
- --version
- Print the version of setfattr and exit.
- --help
- Print help explaining the command line options.
- --
- End of command line options. All remaining parameters are interpreted as
file names, even if they start with a dash character.
Add extended attribute to user namespace:
$ setfattr -n user.foo -v bar file.txt
To add md5sum of the file as an extended attribute:
# setfattr -n trusted.md5sum -v d41d8cd98f00b204e00998ecf8427e file.txt
Andreas Gruenbacher, <andreas.gruenbacher@gmail.com>
and the SGI XFS development team, <linux-xfs@oss.sgi.com>.
Please send your bug reports or comments to
<https://savannah.nongnu.org/bugs/?group=attr> or
<acl-devel@nongnu.org>.