preventing inside IFSFN_READ...Win98 ...Vxd

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Vinay - 25 May 2004 22:11 GMT

Hi,
I am allowing inside IFSFN_OPEN. but I want to deny file operation inside
IFSFN_READ.Is it possible to set error condition in Iorequ structure and
return file deny from inside IFSFN_READ?
Plz help me out I am writing file system filter driver.

regds
vinay

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Jeff Richards - 26 May 2004 01:20 GMT

This message has been posted to many newsgroups where it is not relevant.

I presume you are referring to FileSystemApiHookFunction with a FunctionNum
value of IFSFN_READ. Since the hook function can completely replace the
original IFS function call, it can do anything that the original call can
do, including setting values in the IOREQ structure. Depending on what may
be installed down the chain, this can be done by calling down the chain and
setting the IOREQ value on the way back, or by setting the value and
returning immediately.

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Jeff Richards
MS MVP W95/W98

> Hi,
> I am allowing inside IFSFN_OPEN. but I want to deny file operation inside
[quoted text clipped - 4 lines]
> regds
> vinay

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