57 lines
1.7 KiB
XML
57 lines
1.7 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<refentry id="scwritebinary">
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<refentryinfo><title>OpenSC API Reference</title></refentryinfo>
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<refmeta>
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<refentrytitle>sc_write_binary</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_write_binary</refname>
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<refpurpose>Write to a new file</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_write_binary(struct sc_card *card, unsigned int offset,
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const unsigned char *buf, size_t count,
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unsigned long flags);
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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 writes <emphasis>count</emphasis> bytes from the buffer pointed to by
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<emphasis>buf</emphasis> to a transparent elementary file (EF) on <emphasis>card</emphasis>. It
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corresponds to the ISO 7816 WRITE BINARY function. Call <link
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linkend="scselectfile">sc_select_file()</link> first to select the file to write to.
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</para>
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<para>
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This function is used to write to a newly created file, or to a a previously unused portion of a
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file. For updating an existing file, use the <link
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linkend="scupdatebinary">sc_update_binary()</link> function.
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</para>
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<para>
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The <emphasis>offset</emphasis> argument specifies the file offset in bytes. The
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<emphasis>flags</emphasis> argument is currently not used, and should be set to 0.
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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 successful, the number of bytes written is returned. Otherwise, a negative value is
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returned.
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</para>
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</refsect1>
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</refentry>
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