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    SubjectRe: Is there a "make hole" (truncate in middle) syscall?
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    On Fri, 2003-12-05 at 11:44, viro@parcelfarce.linux.theplanet.co.uk
    wrote:
    > On Fri, Dec 05, 2003 at 11:22:01AM +0000, Anton Altaparmakov wrote:
    > > On Thu, 4 Dec 2003, Andy Isaacson wrote:
    > > > On Thu, Dec 04, 2003 at 02:32:23PM -0600, Rob Landley wrote:
    > > > I'm curious -- does NTFS implement sparse files? Does the Win32 API
    > > > provide any way to manipulate them? Does the NT kernel have any sparse
    > > > file handling?
    > >
    > > Yes it does. The new NTFS Linux driver has full support for sparse files
    > > as does Windows of course.
    > >
    > > Windows does provide a function which is just "make hole". It takes
    > > starting offset and length (or was it ending offset instead of length,
    > > can't remember) and makes this sparse (obviously aligning to cluster
    > > boundaries, etc).
    >
    > Have fun getting it to play nice with mmap()...

    I have no intention to provide such "make hole" functionality in the
    Linux kernel NTFS driver so I don't need to... (-;

    Cheers,

    Anton
    --
    Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
    Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
    Linux NTFS maintainer / IRC: #ntfs on irc.freenode.net
    WWW: http://linux-ntfs.sf.net/ &
    http://www-stu.christs.cam.ac.uk/~aia21/

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