44 lines
1.2 KiB
XML
44 lines
1.2 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<refentry id="scdetectcardpresence">
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<refentryinfo><title>OpenSC API Reference</title></refentryinfo>
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<refmeta>
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<refentrytitle>sc_detect_card_presence</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_detect_card_presence</refname>
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<refpurpose>Detect presence of smart card in a reader</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_detect_card_presence(sc_reader_t *reader, int slot_id);
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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 whether <emphasis>reader</emphasis> has a card present in
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<emphasis>slot_id</emphasis>.
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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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If an error occurred, the return value is a a negative OpenSC error code. If no card is present, 0
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is returned. Otherwise, a positive value is returned, which is a combination of flags. The flag
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SC_SLOT_CARD_PRESENT is always set. In addition, if the card was exchanged, the
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SC_SLOT_CARD_CHANGED flag is set.
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</para>
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</refsect1>
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</refentry>
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