getextattr(1) - NetBSD Manual Pages

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GETEXTATTR(1)           NetBSD General Commands Manual           GETEXTATTR(1)

getextattr, lsextattr, rmextattr, setextattr -- manipulate extended attributes
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 ...
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 opera- tion 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 mes- sages. -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.
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
extattr(3), extattrctl(8), extattr(9)
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 associ- ated with each file or directory. Extended attribute support was resurrected and made more usable in NetBSD 5.2.
Robert N M Watson Poul-Henning Kamp Emmanuel Dreyfus NetBSD 10.99 January 2, 2005 NetBSD 10.99
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