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--Emulates the RFC 862 echo service, behaving like Unix's "cat" tool.
while true do
--We're reading in 1-byte chunks because calls like io.stdin:read(512) would
--wait for full 512 bytes of data before continuing.
data = io.stdin:read(1)
if data == nil then
break
end
io.stdout:write(data)
io.stdout:flush()
end
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