50 lines
1.3 KiB
XML
50 lines
1.3 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<refentry id="scchecksw">
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<refentryinfo><title>OpenSC API Reference</title></refentryinfo>
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<refmeta>
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<refentrytitle>sc_check_sw</refentrytitle>
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<manvolnum>3</manvolnum>
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<refmiscinfo>opensc</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>sc_check_sw</refname>
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<refpurpose>Check return status from a card transaction</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Synopsis</title>
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<para>
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<programlisting>
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#include <opensc.h>
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int sc_check_sw(struct sc_card *card, int sw1, int sw2);
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</programlisting>
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</para>
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</refsect1>
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<refsect1>
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<title>Description</title>
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<para>
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This function checks the return status as given in <emphasis>sw1</emphasis>
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and <emphasis>sw2</emphasis> against the card-specific errors of
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<emphasis>card</emphasis>. These are set by <link
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linkend="sctransmitapdu">sc_transmit_apdu()</link> in the
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<structfield>apdu.sw1</structfield> and <structfield>apdu.sw2</structfield>
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fields, respectively.
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</para>
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<para>
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The function should be called after every APDU transmission, to convert the
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card's status code to an OpenSC error code.
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</para>
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</refsect1>
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<refsect1>
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<title>Return value</title>
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<para>
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Returns 0 if successful, or a negative value in case of error.
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</para>
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</refsect1>
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</refentry>
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