gistfile1.txt

posix = require('posix');
sys = require('sys');

var writer = posix.open('/tmp/data', process.O_CREAT | process.O_WRONLY, 0666).wait();
var data = 42;
sys.puts("written: " + posix.write(writer, data, null, 'binary').wait());
posix.close(writer);

// file is 2 bytes in size and contains:
// 42
// not a 4 or 8 byte binary value