I merely call the IFD_GetCapabilities function in the IFD_Handler to get the
card status from SCARDTRACK. I'm currently using the Tag ICC_STATE. If you
want to block at the driver level you might use the tag ICC_STATE_BLOCK or
something. You would do this in the IFD_Handler's GetCapabilities function.
That is the best I can come up with since there is really no function listed to
do this.
When your block
finishes, the higher level block will see the change and return. There is
probably a better way of doing this for readers that support interrupts.
Thanks
Dave
On Mon, 18 Jan 1999, you wrote:
>>The function GetStatusChange just blocks until this event occurs using a
>>simple select statement and then the
>>function returns. I'm currently checking card status every 1/4 second and
>>blocking until change occurs.
>>
>
>Is it possible to add an option to forward this "blocking call"
>to the smartcard readers' driver?
>
>I'm about to write a driver for the Intertex readers, and they can signal
>a status change by sending two characters over the serial line.
>
>I'm too new to this to tell the best implementation, but I guess a new (?)
>CT-API command will do. (CT_Data() probably needs to be reentrant then.)
>
>GetStatusChange() calls it:
>
> If supported, it waits for the reader and returns at status change.
>
> If "unknown command" is returned, there is no support from the reader,
> and you have to loop instead.
>
>Or a new CT_GetStatusChange() maybe? But this breaks backward compa-
>tibility with all of the current drivers.
>
>Thanks
>
>Morten Norman
>
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>Linux Smart Card Developers - M.U.S.C.L.E.
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--
******************************************************************
David Corcoran Internet Security/Smartcards
Work: School:
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Quotes:
If it's a hobby for us and a job for you, then why are you doing
such a shoddy job (Microsoft) ? ~ Linus Torvalds
If you can't make it work, at least make it look good.
~ Bill Gates
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***************************************************************
Linux Smart Card Developers - M.U.S.C.L.E.
(Movement for the Use of Smart Cards in a Linux Environment)
http://www.linuxnet.com/smartcard/index.html
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