1PCSC-SPY(1) PC/SC lite PCSC-SPY(1)
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6 pcsc-spy - A PC/SC spy command
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9 pcsc-spy [-n|--nocolor] [-d|--diffable] [-h|--help] [fifo_filename]
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12 pcsc-spy displays PC/SC calls of an application. It must be used with
13 the libpcscspy.so library.
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15 To be able to spy the PC/SC layer, the application flow must be
16 modified so that all PC/SC calls are redirected. Two options are
17 available:
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19 - the application is linked with libpcsclite.so.1
20 - the application loads the libpcsclite.so.1 library using dlopen(3)
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23 -d, --diffable
24 Remove the variable parts (like handler values) from the output so
25 that two execution can be more easily compared.
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27 -h, --help
28 Display a short help text.
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30 -n, --nocolor
31 Disable the output colorization (if you want redirect the output in
32 a file for example).
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34 -v, --version
35 Print the version of the pcsc-spy program plus a copyright, a list
36 of authors.
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39 Applications linked with libpcsclite.so.1
40 We will use the standard "LD_PRELOAD" loader option to load our spying
41 library.
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43 Example:
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45 LD_PRELOAD=/usr/lib/libpcscspy.so pcsc_scan
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47 Application loading libpcsclite.so.1
48 This is the case for the PC/SC wrappers like pyscard (for Python) and
49 pcsc-perl (for Perl). The LD_PRELOAD mechanism can't be used. Instead
50 we replace the libpcsclite.so.1 library by the spying one.
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52 You may use install_spy.sh and uninstall_spy.sh to install and
53 uninstall the spying library.
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55 Using the spying library without pcsc-spy is not a problem but has side
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58 - a line "libpcsclite_nospy.so.1: cannot open shared object file: No
59 such file or directory" will be displayed
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61 - some CPU time will be lost because of the PC/SC calls redirection
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63 Starting the spy tool
64 pcsc-spy
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66 If a command argument is passed we use it instead of the default
67 ~/pcsc-spy FIFO file. It is then possible to record an execution log
68 and use pcsc-spy multiple times on the same log.
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70 To create the log file just do:
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72 mkfifo ~/pcsc-spy
73 cat ~/pcsc-spy > logfile
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75 and run your PC/SC application.
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77 Mac OS X
78 The installation is not automatic. In the pcsc-lite/src/spy directory
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81 make framework
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83 Then copy the PCSC.framework directory in /tmp
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85 cp -a PCSC.framework /tmp
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87 Copy the official PCSC.framework (binary only) in /tmp
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89 cp /System/Library/Frameworks/PCSC.framework/PCSC /tmp
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91 Run the application to debug as:
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93 DYLD_FRAMEWORK_PATH=/tmp pcsctest
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96 ~/pcsc-spy FIFO file is used by libpcsclite.so.1 to send the raw log
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100 pcscd(8)
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103 This manual page was written by Ludovic Rousseau <rousseau@free.fr>
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107pcsc-lite 1.8.25 2018-07-15 PCSC-SPY(1)