![]() ( The extended attribute mapping described below only applies since ntfs-3g-2010.5.16AR.1) The program ntfscp.c and the shell command ntfscp.sh, available in tools.zip, demonstrate how files can be copied with their internal data.īeing in the system name space, they are not returned when the extended attribute list is queried, and consequently, not copied by standard file management tools. They can be accessed with any setting of the option streams_interface. Getfattr: Removing leading '/' from absolute path namesĪ few extended attributes in the system name space are used to give access to NTFS internal data which cannot be accessed through Linux standard methods. $ getfattr -n lor /media/tmp/tests/xattr/file $ # Back on Linux, display the extended attribute "lor" ![]() The Linux file /media/tmp/tests/xattr/file is the same physical file as k:tests\xattr\file on an NTFS partition. Example:įirst part is executed on Linux, and then on Windows and eventually back on Linux. They can be read and modified in Windows by using the standard file access functions, with a colon and the stream name (which is the unprefixed extended attribute name) appended to the file name. The extended attributes in user name space are stored on NTFS as alternate data streams whose name is the unprefixed name of the attribute, and whose contents is the value of the attribute. On systems with open name spaces, such as Mac OS X, these features are enabled through the mount option streams_interface=openxattr. Some Linux distributions and most other operating systems do not support a compatible extended attribute interface. Your operating system has to provide an extended attribute interface for the features referenced on this page to be available. With this option (activated by default), the four name spaces are supported by ntfs-3g on Linux. The extended attributes are enabled through the mount option streams_interface=xattr. They can be retrieved and set through system calls ( getxattr(2), setxattr(2), removexattr(2)) or shell commands ( getfattr(1), setfattr(1)), provided appropriate access conditions are met: However a high-level language may hide the system prefixing so that, for instance, the user.mime_type attribute name would appear as " mime_type" in a source code. Examples of extended attribute names are linux, system.posix_acl_access or user.mime_type. The names of the extended attributes must be prefixed by the name of the category and a dot, hence these categories are generally qualified as name spaces. user : to record properties defined by applications.system : to record other system related properties on which the file owner has some control,. ![]()
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