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---------------------------------------------------
-- Licensed under the GNU General Public License v2
-- * (c) 2011, Adrian C. <anrxc@sysphere.org>
-- * (c) 2009, Lucas de Vries <lucas@glacicle.com>
-- * (c) 2011, Jörg Thalheim <jthalheim@gmail.com>
---------------------------------------------------
-- {{{ Grab environment
local ipairs = ipairs
local io = { open = io.open }
local setmetatable = setmetatable
local math = { floor = math.floor }
local table = { insert = table.insert }
local string = {
sub = string.sub,
gmatch = string.gmatch
}
-- }}}
-- Cpu: provides CPU usage for all available CPUs/cores
-- vicious.widgets.cpu
local cpu = {}
-- Initialize function tables
local cpu_usage = {}
local cpu_total = {}
local cpu_active = {}
-- {{{ CPU widget type
local function worker(format)
local cpu_lines = {}
-- Get CPU stats
local f = io.open("/proc/stat")
for line in f:lines() do
if string.sub(line, 1, 3) ~= "cpu" then break end
cpu_lines[#cpu_lines+1] = {}
for i in string.gmatch(line, "[%s]+([^%s]+)") do
table.insert(cpu_lines[#cpu_lines], i)
end
end
f:close()
-- Ensure tables are initialized correctly
for i = #cpu_total + 1, #cpu_lines do
cpu_total[i] = 0
cpu_usage[i] = 0
cpu_active[i] = 0
end
for i, v in ipairs(cpu_lines) do
-- Calculate totals
local total_new = 0
for j = 1, #v do
total_new = total_new + v[j]
end
local active_new = total_new - (v[4] + v[5])
-- Calculate percentage
local diff_total = total_new - cpu_total[i]
local diff_active = active_new - cpu_active[i]
if diff_total == 0 then diff_total = 1E-6 end
cpu_usage[i] = math.floor((diff_active / diff_total) * 100)
-- Store totals
cpu_total[i] = total_new
cpu_active[i] = active_new
end
return cpu_usage
end
-- }}}
return setmetatable(cpu, { __call = function(_, ...) return worker(...) end })
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