1SC_UPDATE_BINARY(3)          OpenSC API reference          SC_UPDATE_BINARY(3)
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NAME

6       sc_update_binary - Write to an existing file
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SYNOPSIS

9          #include <opensc.h>
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11          int sc_update_binary(struct sc_card *card, unsigned int offset,
12                               const unsigned char *buf, size_t count,
13                               unsigned long flags);
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DESCRIPTION

18       This function writes count bytes from the buffer pointed to by buf to a
19       transparent elementary file (EF) on card. It corresponds to the ISO
20       7816 UPDATE BINARY function. Call sc_select_file() first to select the
21       file to write to.
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23       This function can only be used to write to a file region previously
24       written to. For writing to a newly created file, or a new region of an
25       existing file, use sc_write_binary().
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27       The offset argument specifies the file offset in bytes. The flags
28       argument is currently not used, and should be set to 0.
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RETURN VALUE

31       If successful, the number of bytes written is returned. Otherwise, a
32       negative value is returned.
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36opensc                            05/04/2007               SC_UPDATE_BINARY(3)
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