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issue #9 fix
[etc/awesome.git] / widgets / mem.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2013,      Luke Bonham                
6       * (c) 2010-2012, Peter Hofmann              
7                                                   
8 --]]
9
10 local newtimer        = require("lain.helpers").newtimer
11
12 local wibox           = require("wibox")
13
14 local io              = { lines  = io.lines }
15 local math            = { floor  = math.floor }
16 local string          = { format = string.format,
17                           gmatch = string.gmatch,
18                           len    = string.len }
19
20 local setmetatable    = setmetatable
21
22 -- Memory usage (ignoring caches)
23 -- lain.widgets.mem
24 local mem = {}
25
26 local function worker(args)
27     local args     = args or {}
28     local timeout  = args.timeout or 3
29     local settings = args.settings or function() end
30
31     mem.widget = wibox.widget.textbox('')
32
33     function update()
34         mem_now = {}
35         for line in io.lines("/proc/meminfo")
36         do
37             for k, v in string.gmatch(line, "([%a]+):[%s]+([%d]+).+")
38             do
39                 if     k == "MemTotal"  then mem_now.total = math.floor(v / 1024)
40                 elseif k == "MemFree"   then mem_now.free  = math.floor(v / 1024)
41                 elseif k == "Buffers"   then mem_now.buf   = math.floor(v / 1024)
42                 elseif k == "Cached"    then mem_now.cache = math.floor(v / 1024)
43                 elseif k == "SwapTotal" then mem_now.swap  = math.floor(v / 1024)
44                 elseif k == "SwapFree"  then mem_now.swapf = math.floor(v / 1024)
45                 end
46             end
47         end
48
49         mem_now.used = mem_now.total - (mem_now.free + mem_now.buf + mem_now.cache)
50         mem_now.swapused = mem_now.swap - mem_now.swapf
51
52         widget = mem.widget
53         settings()
54     end
55
56     newtimer("mem", timeout, update)
57
58     return mem.widget
59 end
60
61 return setmetatable(mem, { __call = function(_, ...) return worker(...) end })