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Accessing network files from W2K

OSR_Community_UserOSR_Community_User Member Posts: 110,217
Dear All!

I've encountered the following problem: if a file is shared on Win95/98 I cannot read it from the kernel in Win2K using UNC path.
If I map the UNC path as a drive I can read the same file from the network drive.
If a file is shared on WinNT I can read it using UNC path.

The same driver can read the shared file in WinNT independing on where the file is shared.

BTW, I use thread impersonation when reading the file. Does it matter?

Any ideas?

Regards,
Max Lyadvinsky

Comments

  • OSR_Community_UserOSR_Community_User Member Posts: 110,217
    The proper way is to do the I/O in the context of a process that has access
    rights to the network resource. I do this by creating a system thread in the
    context of a known process (i.e. a service under NT/2000).

    Jamey

    > -----Original Message-----
    > From: [email protected]
    > [mailto:[email protected]]On Behalf Of Max Lyadvinsky
    > Sent: Thursday, April 06, 2000 9:56 AM
    > To: File Systems Developers
    > Subject: [ntfsd] Accessing network files from W2K
    >
    >
    > Dear All!
    >
    > I've encountered the following problem: if a file is shared on
    > Win95/98 I cannot read it from the kernel in Win2K using UNC path.
    > If I map the UNC path as a drive I can read the same file from
    > the network drive.
    > If a file is shared on WinNT I can read it using UNC path.
    >
    > The same driver can read the shared file in WinNT independing on
    > where the file is shared.
    >
    > BTW, I use thread impersonation when reading the file. Does it matter?
    >
    > Any ideas?
    >
    > Regards,
    > Max Lyadvinsky
    >
    >
    > ---
    > You are currently subscribed to ntfsd as: [email protected]
    > To unsubscribe send a blank email to $subst('Email.Unsub')
    >
    >
  • OSR_Community_UserOSR_Community_User Member Posts: 110,217
    A service runs in the context of the system process. So does my kernel thread.
    I impersonate the known thread, that has access to the network. I don't think it does matter whether I access the network from the thread I impersonate or from the system thread in which I impersonate. Maybe this is a W2K bug? The same code works fine under WinNT.

    ----------
    ??: Jamey Kirby[SMTP:[email protected]]
    ?????: File Systems Developers
    ??????????: 6 ?????? 2000 ?. 21:33
    ????: File Systems Developers
    ????: [ntfsd] RE: Accessing network files from W2K

    The proper way is to do the I/O in the context of a process that has access
    rights to the network resource. I do this by creating a system thread in the
    context of a known process (i.e. a service under NT/2000).

    Jamey

    > -----Original Message-----
    > From: [email protected]
    > [mailto:[email protected]]On Behalf Of Max Lyadvinsky
    > Sent: Thursday, April 06, 2000 9:56 AM
    > To: File Systems Developers
    > Subject: [ntfsd] Accessing network files from W2K
    >
    >
    > Dear All!
    >
    > I've encountered the following problem: if a file is shared on
    > Win95/98 I cannot read it from the kernel in Win2K using UNC path.
    > If I map the UNC path as a drive I can read the same file from
    > the network drive.
    > If a file is shared on WinNT I can read it using UNC path.
    >
    > The same driver can read the shared file in WinNT independing on
    > where the file is shared.
    >
    > BTW, I use thread impersonation when reading the file. Does it matter?
    >
    > Any ideas?
    >
    > Regards,
    > Max Lyadvinsky
    >
    >
    > ---
    > You are currently subscribed to ntfsd as: [email protected]
    > To unsubscribe send a blank email to $subst('Email.Unsub')
    >
    >


    ---
    You are currently subscribed to ntfsd as: [email protected]
    To unsubscribe send a blank email to $subst('Email.Unsub')
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