int sc_append_record(struct sc_card *card,
const unsigned char *buf, size_t buflen,
unsigned long flags);
This function appends a record that is buflen bytes long from the buffer pointed to by buf to a record-structured elementary file (EF) on card. The function corresponds to the ISO 7816 APPEND RECORD function. Call sc_select_file() first to select the file to write to.
Returns the number of bytes written if successful, or a negative value in case of error.