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pcsc-spy(1)


NAME

   pcsc-spy - A PC/SC spy command

SYNOPSIS

   pcsc-spy [-n|--nocolor] [-d|--diffable] [-h|--help] [fifo_filename]

DESCRIPTION

   pcsc-spy displays PC/SC calls of an application. It must be used with
   the libpcscspy.so library.

   To be able to spy the PC/SC layer, the application flow must be
   modified so that all PC/SC calls are redirected. Two options are
   available:

   - the application is linked with libpcsclite.so.1
   - the application loads the libpcsclite.so.1 library using dlopen(3)

OPTIONS

   -d, --diffable
       Remove the variable parts (like handler values) from the output so
       that two execution can be more easily compared.

   -h, --help
       Display a short help text.

   -n, --nocolor
       Disable the output colorization (if you want redirect the output in
       a file for example).

   -v, --version
       Print the version of the pcsc-spy program plus a copyright, a list
       of authors.

EXAMPLES

   Applications linked with libpcsclite.so.1
   We will use the standard "LD_PRELOAD" loader option to load our spying
   library.

   Example:

    LD_PRELOAD=/usr/lib/libpcscspy.so pcsc_scan

   Application loading libpcsclite.so.1
   This is the case for the PC/SC wrappers like pyscard (for Python) and
   pcsc-perl (for Perl). The LD_PRELOAD mechanism can't be used. Instead
   we replace the libpcsclite.so.1 library by the spying one.

   You may use install_spy.sh and uninstall_spy.sh to install and
   uninstall the spying library.

   Using the spying library without pcsc-spy is not a problem but has side
   effects:

   - a line "libpcsclite_nospy.so.1: cannot open shared object file: No
   such file or directory" will be displayed

   - some CPU time will be lost because of the PC/SC calls redirection

   Starting the spy tool
    pcsc-spy

   If a command argument is passed we use it instead of the default
   ~/pcsc-spy FIFO file. It is then possible to record an execution log
   and use pcsc-spy multiple times on the same log.

   To create the log file just do:

    mkfifo ~/pcsc-spy
    cat ~/pcsc-spy > logfile

   and run your PC/SC application.

   Mac OS X
   The installation is not automatic. In the pcsc-lite/src/spy directory
   do:

    make framework

   Then copy the PCSC.framework directory in /tmp

    cp -a PCSC.framework /tmp

   Copy the official PCSC.framework (binary only) in /tmp

    cp /System/Library/Frameworks/PCSC.framework/PCSC /tmp

   Run the application to debug as:

    DYLD_FRAMEWORK_PATH=/tmp pcsctest

FILES

   ~/pcsc-spy FIFO file is used by libpcsclite.so.1 to send the raw log
   lines

SEE ALSO

   pcscd(8)

AUTHOR

   This manual page was written by Ludovic Rousseau <rousseau@free.fr>



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