87 lines
2.5 KiB
Lua
87 lines
2.5 KiB
Lua
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-- CPU usage widget type for GNU/Linux
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-- Copyright (C) 2009 Lucas de Vries <lucas@glacicle.com>
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-- Copyright (C) 2011 Adrian C. <anrxc@sysphere.org>
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-- Copyright (C) 2011 Jörg Thalheim <jthalheim@gmail.com>
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-- Copyright (C) 2017 mutlusun <mutlusun@github.com>
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--
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-- This file is part of Vicious.
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--
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-- Vicious is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as
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-- published by the Free Software Foundation, either version 2 of the
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-- License, or (at your option) any later version.
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--
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-- Vicious is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with Vicious. If not, see <https://www.gnu.org/licenses/>.
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-- {{{ Grab environment
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local ipairs = ipairs
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local io = { open = io.open }
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local math = { floor = math.floor }
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local table = { insert = table.insert }
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local string = {
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sub = string.sub,
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gmatch = string.gmatch
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}
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local helpers = require"vicious.helpers"
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-- }}}
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-- Initialize function tables
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local cpu_usage = {}
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local cpu_total = {}
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local cpu_active = {}
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-- {{{ CPU widget type
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return helpers.setcall(function ()
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local cpu_lines = {}
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-- Get CPU stats
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local f = io.open("/proc/stat")
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for line in f:lines() do
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if string.sub(line, 1, 3) ~= "cpu" then break end
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cpu_lines[#cpu_lines+1] = {}
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for i in string.gmatch(line, "[%s]+([^%s]+)") do
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table.insert(cpu_lines[#cpu_lines], i)
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end
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end
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f:close()
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-- Ensure tables are initialized correctly
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for i = #cpu_total + 1, #cpu_lines do
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cpu_total[i] = 0
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cpu_usage[i] = 0
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cpu_active[i] = 0
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end
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for i, v in ipairs(cpu_lines) do
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-- Calculate totals
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local total_new = 0
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for j = 1, #v do
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total_new = total_new + v[j]
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end
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local active_new = total_new - (v[4] + v[5])
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-- Calculate percentage
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local diff_total = total_new - cpu_total[i]
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local diff_active = active_new - cpu_active[i]
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if diff_total == 0 then diff_total = 1E-6 end
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cpu_usage[i] = math.floor((diff_active / diff_total) * 100)
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-- Store totals
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cpu_total[i] = total_new
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cpu_active[i] = active_new
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end
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return cpu_usage
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end)
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-- }}}
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