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Graham Perrin

NTFS-3G: Extended Attributes - 0 views

pagesperso-orange.fr/...extend-attr.html

ea NTFS

shared by Graham Perrin on 26 May 09 - Cached
Graham Perrin liked it
  • information which cannot be stored in the file
  • Extended attributes are properties
  • optionally set to files or directories
  • ...23 more annotations...
  • with variations
  • Windows, Linux, Solaris, MacOSX
  • On Linux, specifically, four categories of extended attributes have been defined
  • user : to record properties defined by applications
  • names of the extended attributes must be prefixed
  • Examples of extended attribute names
  • stable ntfs-3g supports the user name space
  • some Linux distributions do not support the extended attribute interface
  • commands for getting or setting the extended attributes are system dependent
  • extended attributes in user name space are stored on NTFS as alternative data streams
  • The following sections describe how to access a few NTFS internal data as extended attributes
  • NTFS Attributes
  • miscellaneous flags associated with a file or directory
  • Only eight flags can be changed
  • NTFS use reparse data to define special actions before opening
  • reparse data of a file or directory is mapped to an extended attribute
  • translated into ownership, permissions and Posix ACLs parameters
  • NTFS ACLs are used to control access
  • NTFS ACL of a file or directory is mapped to an extended attribute
  • EFS is the methodology used in NTFS to deal with encrypted files
  • decryption information, the EFS Info, which contains the key, encrypted
  • decryption information is mapped to an extended attribute
  • encryption and compression are not compatible
  • Graham Perrin on 26 May 09
     
    Annotated link: http://www.diigo.com/0619k
Graham Perrin

Cyberduck support for resource forks and extended attributes - 0 views

trac.cyberduck.ch/374

SFTP FTP xattr extended attribute resource fork

shared by Graham Perrin on 16 Nov 08 - Cached
  • What about extended attributes and other things that may result in ._ dot underscore files?
  • resolution set to wontfix
  • Graham Perrin on 16 Nov 08
     
    A question concerning extended attributes was not answered; the ticket was closed. "Won't fix."
Graham Perrin

OPTIONS - - 0 views

code.google.com/...OPTIONS

2009 Filesystem in Userspace

shared by Graham Perrin on 17 Jan 09 - Cached
  • MacFUSE provides a flexible and adaptive mechanism to handle extended attributes (including things such as Finder Info, Resource Forks, and ACLs)
  • extended attributes as Apple Double (._) files
  • all or only some extended attributes
  • ...14 more annotations...
  • To properly support ACLs, a user-space file system must correctly handle the com.apple.system.Security extended attribute
  • MacFUSE supports Mac OS X access control lists (ACLs)
  • With auto_xattr, the kernel will /always/ use ._ files
  • MacFUSE limits volume access to the user that mounted the volume
  • blanket denial is a first line of defense
  • allow_other to turn the blanket denial off
  • not a means of distributed file sharing
  • SFTP is merely a utility
  • create a true distributed file system based on MacFUSE
  • nolocalcaches makes the operating system work in an abnormal mode
  • relevant code paths may not have been well tested
  • overhead
  • file operations could end up being /much/ slower
  • SFTP provides no synchronization or locking
Graham Perrin

Resource Fork State of the Union - 0 views

groups.google.com/...5ee419ffe4f9ec3d

volfs xattrs Finder Tiger

shared by Graham Perrin on 15 Nov 08 - Cached
  • if the volumesupports "volfs". If it does
  • it concludes that it must support xattrs
  • on Tiger, the Finder (the File Manager) refuses to believe that the volume in question can support extended attributes
  • Graham Perrin on 15 Nov 08
     
    Resource Fork State of the Union
Graham Perrin

FAQ - macfuse - Google Code - Frequently Asked Questions (and Answers) - 0 views

code.google.com/...FAQ

Finder performance 2008 Filesystem in Userspace

shared by Graham Perrin on 14 Nov 08 - Cached
Graham Perrin liked it
  • I mounted a MacFUSE volume but I don't see a volume icon on the Desktop
  • I mounted a MacFUSE volume but I don't see a volume icon in the Finder's sidebar
  • sshfs isn't meant to replace things such as NFS, AFP, and SMB
  • ...5 more annotations...
  • a substitute when you don't have any remote file sharing access to a computer, but you do have sftp access
    • Graham Perrin
      Graham Perrin on 26 May 09
       
      A rich experience, with which users of Apple Finder and Mac OS X are accustomed, can not be guaranteed within the limitations of a protocol such as FTP.
    • Graham Perrin
      Graham Perrin on 26 May 09
       
      Hint: Finder does very much more than simply transfer files. Much of the Finder experience, which users (naturally) take for granted, is thanks to extensive use of extended attributes and metadata.
    • Graham Perrin
      Graham Perrin on 26 May 09
       
      Users of FTP, SFTP and SHH services: please, pay attention! The best marriage of Apple Finder and Mac OS X to a remote file system is: Apple Filing Protocol (AFP).
  • MacFUSE allows access to a volume only to the user who mounted the volume. All other users, including the superuser is denied access
  • nontrivial user-space file systems can still be complex, and their performance/behavior can depend upon numerous factors besides MacFUSE itself
  • When in doubt, feel free to post your questions on the macfuse group
  • MacFUSE itself isn't a distributed remote file system
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