Ruby 寫文件+文件鎖

def datawrite(path,text)
	file=File.open(path,'a+')
	file.flock(File::LOCK_EX)
	file.write('<?xml version="1.0" encoding="UTF-8"?><dl>'+text+'</dl></scrap>')
	file.flock(File::LOCK_UN)
	file.close
end