/usr/share/doc/liblua-socket-doc/samples/tinyirc.lua is in liblua-socket-doc 2.0.2-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 | -----------------------------------------------------------------------------
-- Select sample: simple text line server
-- LuaSocket sample files.
-- Author: Diego Nehab
-- RCS ID: $Id: tinyirc.lua,v 1.14 2005/11/22 08:33:29 diego Exp $
-----------------------------------------------------------------------------
local socket = require("socket")
host = host or "*"
port1 = port1 or 8080
port2 = port2 or 8181
if arg then
host = arg[1] or host
port1 = arg[2] or port1
port2 = arg[3] or port2
end
server1 = assert(socket.bind(host, port1))
server2 = assert(socket.bind(host, port2))
server1:settimeout(1) -- make sure we don't block in accept
server2:settimeout(1)
io.write("Servers bound\n")
-- simple set implementation
-- the select function doesn't care about what is passed to it as long as
-- it behaves like a table
-- creates a new set data structure
function newset()
local reverse = {}
local set = {}
return setmetatable(set, {__index = {
insert = function(set, value)
if not reverse[value] then
table.insert(set, value)
reverse[value] = table.getn(set)
end
end,
remove = function(set, value)
local index = reverse[value]
if index then
reverse[value] = nil
local top = table.remove(set)
if top ~= value then
reverse[top] = index
set[index] = top
end
end
end
}})
end
set = newset()
io.write("Inserting servers in set\n")
set:insert(server1)
set:insert(server2)
while 1 do
local readable, _, error = socket.select(set, nil)
for _, input in ipairs(readable) do
-- is it a server socket?
if input == server1 or input == server2 then
io.write("Waiting for clients\n")
local new = input:accept()
if new then
new:settimeout(1)
io.write("Inserting client in set\n")
set:insert(new)
end
-- it is a client socket
else
local line, error = input:receive()
if error then
input:close()
io.write("Removing client from set\n")
set:remove(input)
else
io.write("Broadcasting line '", line, "'\n")
writable, error = socket.skip(1, socket.select(nil, set, 1))
if not error then
for __, output in ipairs(writable) do
if output ~= input then
output:send(line .. "\n")
end
end
else io.write("No client ready to receive!!!\n") end
end
end
end
end
|