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|
--
-- rhctl
--
-- Copyright (C) 2009 Christian Pointner <equinox@spreadspace.org>
--
-- This file is part of rhctl.
--
-- rhctl is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- any later version.
--
-- rhctl is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with rhctl. If not, see <http://www.gnu.org/licenses/>.
--
socket = require("socket")
current_mode = nil
function init_server(host, port)
local server = assert(socket.tcp())
assert(server:setoption('reuseaddr', true))
assert(server:bind(host, port))
assert(server:listen(5))
return server
end
local clients = {}
function add_client(hdl)
log.printf(log.DEBUG, "new client(" .. hdl:getfd() .. ") from " .. hdl:getpeername())
local client = {}
if current_mode then
client.buffer = current_mode .. "\n"
else
client.buffer = ""
end
client.hdl = hdl
client.getfd = function() return hdl:getfd() end
client.dirty = function() return hdl:dirty() end
table.insert(clients, client)
end
function remove_client(c)
local idx = 0
local found = false
for i, client in ipairs(clients) do
if client == c then
found = true
idx = i
break
end
end
if found then
log.printf(log.DEBUG, "removing client(" .. c.hdl:getfd() .. ")")
c.hdl:close()
table.remove(clients, idx)
end
end
function cleanup_clients()
for _, client in ipairs(clients) do
client.hdl:close()
end
end
function clients_get_writeables()
local fds = {}
for _, client in ipairs(clients) do
if client.buffer ~= "" then
table.insert(fds, client)
end
end
return fds
end
function clients_senddata(data)
for _, client in ipairs(clients) do
client.buffer = client.buffer .. data .. "\n"
end
end
function process_cmd(message)
log.printf(log.DEBUG, "received message: '%s'", message)
local new_mode = nil
local exps = { "Current Mode: (%a+)", "new Mode: (%a+)" }
for _, exp in ipairs(exps) do
new_mode = string.match(message, exp)
if(new_mode) then
new_mode = string.lower(new_mode)
break
end
end
if(new_mode and new_mode ~= current_mode) then
clients_senddata(new_mode)
current_mode = new_mode
end
return 0
end
function main_loop(opt)
log.printf(log.NOTICE, "main_loop started")
local sig = signal.init()
local cmdfd = cmd.init()
local server = init_server("*", "2345")
cmd.send_string("listen mode");
cmd.send_string("status");
local return_value = 0
while return_value == 0 do
local readable, writeable, err = socket.select({ sig , cmdfd , server , unpack(clients) }, clients_get_writeables())
if(err) then
log.printf(log.ERROR, "select returned with error: %s", err)
return_value = -1
else
for _, input in ipairs(readable) do
if input == sig then
return_value = signal.handle()
if(return_value == 1) then break end
elseif input == cmdfd then
return_value = cmd.recv_data(process_cmd)
if(return_value ~= 0) then break end
elseif input == server then
local client = server:accept()
if(client == nil) then
return_value =-3
break
else
add_client(client)
end
else
if input.hdl then
-- receive is insanely stupid, therefore we must always read one byte only
local _, err = input.hdl:receive(1)
if err then
remove_client(input)
end
end
end
end
for _, output in ipairs(writeable) do
local ret = output.hdl:send(output.buffer)
if(ret == nil) then
remove_client(output)
else
output.buffer = string.sub(output.buffer, ret+1)
end
end
end
end
server:close()
cleanup_clients()
signal.stop()
return return_value
end
|
