[Pcsclite-muscle] How to find out which process is accessing the card?

František Řezáč frantisek.rezac
Wed Sep 27 12:58:25 PDT 2017


I'm using smart card for almost everything in my daily work, but I have a
problem which drives me crazy. I'm using YubiKey in two scenarios: pkcs11
based PAM and SSH authentication and also as a GPG? smart card. I
understand that accesing one card via pkcs11 and scdaemon in turns is
troubling, because GPG tends to lock the access to the card for itself full
time, but I can handle that by manualy terminating scdaemon.

But I have also come across the opossite situation many times - something
locks access to the card via pkcs11 which prevents the access from scdaemon
with the dreaded "PC/SC OPEN failed: sharing violation". The problem is
that I don't know which process is using the card so I don't know how to
deal with it except for restarting the whole pcscd. Also this problem seems
to happen randomly so I don't have any clue if it's pam module or ssh agent
or something else and it also randomly disappears. If I know what is using
the card, I could try to configure it better or deal with it more gently.

And that's my question - how to find out what is currently
accessing/locking the card at a given time? I tried to figure it out
myself, but after I have seen this schema
I realized that I don't even know at which level I should look for that

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.alioth.debian.org/pipermail/pcsclite-muscle/attachments/20170927/aa1b25ab/attachment.html>

More information about the pcsclite-muscle mailing list