sscanf in kernel.

Hi,everyone.
How can i use sscanf in kernel?
Or get a route just like it?
Thanks!

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Surely no sscanf() in the kernel, the routine is very much unsafe. Write
your own analog by using NtStrSafe.h functions.

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

----- Original Message -----
From: “f”
To: “Windows System Software Devs Interest List”
Sent: Friday, November 05, 2004 10:49 AM
Subject: [ntdev] sscanf in kernel.

> Hi,everyone.
> How can i use sscanf in kernel?
> Or get a route just like it?
> Thanks!
>
>
>
>
>
> –http://www.eyou.com
> --Îȶ¨¿É¿¿µÄµç×ÓÐÅÏä ÓïÒôÓʼþ Òƶ¯ÊéÇ© ÈÕÀú·þÎñ ÍøÂç´æ´¢…ÒÚÓÊδ¾¡
>
> –http://vip.eyou.com
> --¿ì¿ìµÇ¼ÒÚÓÊVIPÐÅÏä ×¢²áÄúÖÐÒâµÄÓû§Ãû
>
>
>
> —
> Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256
>
> You are currently subscribed to ntdev as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to xxxxx@lists.osr.com

The bigger question is why do you need to parse a string like this? Is a user mode application sending you a string for you to parse or reading it from the reigstry? If so, be very very careful in your parsing. Any one can send you a malformed string and cause your driver to overflow a buffer or something far worse.

d

-----Original Message-----
From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com] On Behalf Of Maxim S. Shatskih
Sent: Friday, November 05, 2004 12:04 AM
To: Windows System Software Devs Interest List
Subject: Re: [ntdev] sscanf in kernel.

Surely no sscanf() in the kernel, the routine is very much unsafe. Write
your own analog by using NtStrSafe.h functions.

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

----- Original Message -----
From: “f”
To: “Windows System Software Devs Interest List”
Sent: Friday, November 05, 2004 10:49 AM
Subject: [ntdev] sscanf in kernel.

> Hi,everyone.
> How can i use sscanf in kernel?
> Or get a route just like it?
> Thanks!
>
>
>
>
>
> –http://www.eyou.com
> --?ȶ??ɿ??ĵ??? ???ʼ? ?ƶ???ǩ ??? ???洢…???δ??
>
> –http://vip.eyou.com
> --???¼???VIP??? ע???û???
>
>
>
> —
> Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256
>
> You are currently subscribed to ntdev as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to xxxxx@lists.osr.com


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

You are currently subscribed to ntdev as: xxxxx@windows.microsoft.com
To unsubscribe send a blank email to xxxxx@lists.osr.com

Well at the risk of heresy, string parsing is something that a driver may
need to do, and the lack of standard string parsing support routines,
including safe versions of these, means that driver developers are out
re-implementing the wheel with consequent design and implementation bug
re-discovery.

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Doron Holan
Sent: Friday, November 05, 2004 11:51 AM
To: Windows System Software Devs Interest List
Subject: RE: [ntdev] sscanf in kernel.

The bigger question is why do you need to parse a string like
this? Is a user mode application sending you a string for you
to parse or reading it from the reigstry? If so, be very
very careful in your parsing. Any one can send you a
malformed string and cause your driver to overflow a buffer
or something far worse.

d

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Maxim
S. Shatskih
Sent: Friday, November 05, 2004 12:04 AM
To: Windows System Software Devs Interest List
Subject: Re: [ntdev] sscanf in kernel.

Surely no sscanf() in the kernel, the routine is very
much unsafe. Write your own analog by using NtStrSafe.h functions.

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

----- Original Message -----
From: “f”
> To: “Windows System Software Devs Interest List”
> Sent: Friday, November 05, 2004 10:49 AM
> Subject: [ntdev] sscanf in kernel.
>
>
> > Hi,everyone.
> > How can i use sscanf in kernel?
> > Or get a route just like it?
> > Thanks!
> >
> >
> >
> >
> >
> > –http://www.eyou.com
> > --??T??詩??? ???+? ??T???L ???T???
> ???æԦ-…???+?
> >
> > –http://vip.eyou.com
> > --?˩˦??+???VIP??? ?-???
> >
> >
> >
> > —
> > Questions? First check the Kernel Driver FAQ at
> http://www.osronline.com/article.cfm?id=256
> >
> > You are currently subscribed to ntdev as: xxxxx@storagecraft.com
> > To unsubscribe send a blank email to xxxxx@lists.osr.com
>
>
> —
> Questions? First check the Kernel Driver FAQ at
> http://www.osronline.com/article.cfm?id=256
>
> You are currently subscribed to ntdev as: xxxxx@windows.microsoft.com
> To unsubscribe send a blank email to xxxxx@lists.osr.com
>
> —
> Questions? First check the Kernel Driver FAQ at
> http://www.osronline.com/article.cfm?id=256
>
> You are currently subscribed to ntdev as: unknown lmsubst tag
> argument: ‘’
> To unsubscribe send a blank email to xxxxx@lists.osr.com
>

In my opinion, it is a far greater hole. Pls do not use any of those c library routines. Use of Kerenle provide safe routines or kernel provided routines for counted string is far better. The safe string routines in krnl library and counted strings are more than enough to get thing going…

-pro

In NT platforms, the most kernel strings are UNICODE, also, due to the
IRQL level is various, the memory access can not be as simple as the user
mode.
The common C lib routines are not “safe” in some cases unless your function
has a clear
knowledge of the IRQL level and the context. So, you have to take care the
“sscanf”
thing by your own.

“f” wrote in message news:xxxxx@ntdev…
> Hi,everyone.
> How can i use sscanf in kernel?
> Or get a route just like it?
> Thanks!
>
>
>
>
>
> –http://www.eyou.com
> --Îȶ¨¿É¿¿µÄµç×ÓÐÅÏä ÓïÒôÓʼþ Òƶ¯ÊéÇ© ÈÕÀú·þÎñ ÍøÂç´æ´¢…ÒÚÓÊδ¾¡
>
> –http://vip.eyou.com
> --¿ì¿ìµÇ¼ÒÚÓÊVIPÐÅÏä ×¢²áÄúÖÐÒâµÄÓû§Ãû
>
>
>