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.\"Generated by db2man.xsl. Don't modify this, modify the source.
.de Sh \" Subsection
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.de Ip \" List item
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.TH "SC_WRITE_BINARY" 3 "" "" "OpenSC API Reference"
.SH NAME
sc_write_binary \- Write to a new file
.SH "SYNOPSIS"
.PP
.nf
#include <opensc\&.h>
int sc_write_binary(struct sc_card *card, unsigned int offset,
const unsigned char *buf, size_t count,
unsigned long flags);
.fi
.SH "DESCRIPTION"
.PP
This function writes \fIcount\fR bytes from the buffer pointed to by\fIbuf\fR to a transparent elementary file (EF) on \fIcard\fR\&. It corresponds to the ISO 7816 WRITE BINARY function\&. Call sc_select_file() first to select the file to write to\&.
.PP
This function is used to write to a newly created file, or to a a previously unused portion of a file\&. For updating an existing file, use the sc_update_binary() function\&.
.PP
The \fIoffset\fR argument specifies the file offset in bytes\&. The\fIflags\fR argument is currently not used, and should be set to 0\&.
.SH "RETURN VALUE"
.PP
If successful, the number of bytes written is returned\&. Otherwise, a negative value is returned\&.
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