appending data to file from driver

NTFSD
1

I am writing a file from a driver. Since i want to append the new data, how to move to the end of file.
Is it ZwSetInformationFile ?

…Mani

2

You may get the current ifle size and write
the data at the offset of “FileSize”. This will append
the data as you wanted.

L.

3

You can use the “magic number” - specify FILE_WRITE_TO_END_OF_FILE as
the ByteOffset value - make sure if you do so that you set the upper
part as well (basically, the value is ((ULONGLONG)(~0))).

Regards,

Tony

Tony Mason

Consulting Partner

OSR Open Systems Resources, Inc.

http://www.osr.com http:</http:>

From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Mani
Sent: Tuesday, April 12, 2005 2:41 AM
To: ntfsd redirect
Subject: [ntfsd] appending data to file from driver

I am writing a file from a driver. Since i want to append the new data,
how to move to the end of file.

Is it ZwSetInformationFile ?

…Mani

Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

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