ZwOpenFile - boot driver

NTDEV
1

I’m trying to open driver’s private database file located at
L"\SystemRoot\hwinfo.db" with ZwOpenFile . The driver is upper pci bus
filter loaded at boot stage. I’m calling ZwOpenFile from AddDevice. The
status returned is STATUS_OBJECT_PATH_NOT_FOUND. I suspect this is
normal behaviour for the ZwOpenFile when called from boot driver. Is
there a way to make it work? Perhaps moving hwinfo.db to some other place?

Robert Milharcic

2

It may be because the system volume is not mounted yet. Check this thread for a solution to your problem

http://www.osronline.com/showThread.cfm?link=69255

Regards,
Bogdan

“Robert M.” wrote:
I’m trying to open driver’s private database file located at
L"\SystemRoot\hwinfo.db" with ZwOpenFile . The driver is upper pci bus
filter loaded at boot stage. I’m calling ZwOpenFile from AddDevice. The
status returned is STATUS_OBJECT_PATH_NOT_FOUND. I suspect this is
normal behaviour for the ZwOpenFile when called from boot driver. Is
there a way to make it work? Perhaps moving hwinfo.db to some other place?

Robert Milharcic

—
Questions? First check the Kernel Driver FAQ at http://www.osronline.com/article.cfm?id=256

To unsubscribe, visit the List Server section of OSR Online at http://www.osronline.com/page.cfm?name=ListServer

---------------------------------
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3

Bogdan Hobeanu wrote:

It may be because the system volume is not mounted yet. Check this
thread for a solution to your problem

http://www.osronline.com/showThread.cfm?link=69255

Yes, that is it. Thanks!

Regards,
Bogdan

*/“Robert M.” /* wrote:
>
>
> I’m trying to open driver’s private database file located at
> L"\SystemRoot\hwinfo.db" with ZwOpenFile . The driver is upper
> pci bus
> filter loaded at boot stage. I’m calling ZwOpenFile from
> AddDevice. The
> status returned is STATUS_OBJECT_PATH_NOT_FOUND. I suspect this is
> normal behaviour for the ZwOpenFile when called from boot driver. Is
> there a way to make it work? Perhaps moving hwinfo.db to some
> other place?
>
>
> Robert Milharcic
>
> —
> Questions? First check the Kernel Driver FAQ at
> http://www.osronline.com/article.cfm?id=256
>
> To unsubscribe, visit the List Server section of OSR Online at
> http://www.osronline.com/page.cfm?name=ListServer
>
>
> ------------------------------------------------------------------------
> Talk is cheap. Use Yahoo! Messenger to make PC-to-Phone calls. Great
> rates starting at 1¢/min. — Questions? First check the Kernel Driver
> FAQ at http://www.osronline.com/article.cfm?id=256 To unsubscribe,
> visit the List Server section of OSR Online at
> http://www.osronline.com/page.cfm?name=ListServer
> http:</http:>

4

You cannot open any file from Boot driver init paths, use REG_BINARY value
in SYSTEM registry instead.

Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
xxxxx@storagecraft.com
http://www.storagecraft.com

----- Original Message -----
From: “Robert M.”
To: “Windows System Software Devs Interest List”
Sent: Friday, March 31, 2006 2:55 PM
Subject: [ntdev] ZwOpenFile - boot driver

>
> I’m trying to open driver’s private database file located at
> L"\SystemRoot\hwinfo.db" with ZwOpenFile . The driver is upper pci bus
> filter loaded at boot stage. I’m calling ZwOpenFile from AddDevice. The
> status returned is STATUS_OBJECT_PATH_NOT_FOUND. I suspect this is
> normal behaviour for the ZwOpenFile when called from boot driver. Is
> there a way to make it work? Perhaps moving hwinfo.db to some other place?
>
>
> Robert Milharcic
>
> —
> Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256
>
> To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer