Re: libpcsclite API file descriptor for polling?

2015-12-20 14:57 GMT+01:00 Arnaud Loonstra <[email protected]>:

> Hi all,
>

Hello,


> I was going through the internals of libpcsclite and as I noticed it uses
> IPC to communicate with the daemon I was wondering if it is possible to
> retrieve the socket's fd to add it to a poller?
>
> I noticed MessageReceive() in wincard_msg.c:449 is already using select
> (469)
>
> Is this possible through the current API?
>
>
No, it is not possible through the current API.
The API is a "standard" defined by the PCSC workgroup [1] and can't be
changed like that.

I would propose to use an intermediate thread that calls
SCardGetStatusChange() [2] (or whatever PC/SC function you want to poll)
that would write to a file descriptor you created for that.

What do you want to do exactly?

Bye

[1] http://pcscworkgroup.com/specifications/overview.php
[2]
https://pcsclite.alioth.debian.org/api/group__API.html#ga33247d5d1257d59e55647c3bb717db24

-- 
 Dr. Ludovic Rousseau

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