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    SubjectRe: [fuse-devel] utimensat fails to update ctime
    Hi all,


    OGAWA Hirofumi wrote:
    > Eric Blake<ebb9@byu.net> writes:
    >
    >
    > It is likely the issue of libfuse or ntfs-3g. I don't know about ntfs-3g
    > people at all. So, for now, just Cc: to fuse people.
    >

    Which ntfs-3g version are you using ?

    >> utimensat(0, NULL, {UTIME_OMIT, UTIME_NOW}, 0) = 0
    >>
    >

    Currently ntfs-3g does not set sub-second precision.

    There is also a slight problem in the fuse interface :
    the time buffer is never passed as NULL, consequently
    in some circumstances ntfs-3g cannot decide correctly
    over permissions. A permissive action is taken in this
    situation.

    > > From this, "ia_valid" will have "ATTR_CTIME | ATTR_MTIME". And the
    > request would pass to userland via fuse of kernel part, then it will be
    > handled by libfuse.
    >
    > > From quick grep of libfuse and ntfs-3g (would not be latest), ntfs-3g is
    > using "struct fuse_operations", not "struct fuse_lowlevel_ops".
    >

    With the latest ntfs-3g, currently as a release candidate,
    you can (optionally) use the low level fuse interface
    http://pagesperso-orange.fr/b.andre/advanced-ntfs-3g.html
    use the "lowntfs-3g" driver instead of "ntfs-3g"

    Hope this helps

    Regards

    Jean-Pierre





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