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readme updated
[etc/awesome.git] / widgets / net.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 helpers      = require("lain.helpers")
11
12 local notify_fg    = require("beautiful").fg_focus
13 local naughty      = require("naughty")
14 local wibox        = require("wibox")
15
16 local io           = io
17 local tostring     = tostring
18 local string       = { format = string.format,
19                        gsub   = string.gsub }
20
21 local setmetatable = setmetatable
22
23 -- Network infos
24 -- lain.widgets.net
25 local net = {
26     last_t = 0,
27     last_r = 0
28 }
29
30 function net.get_device()
31     f = io.popen("ip link show | cut -d' ' -f2,9")
32     ws = f:read("*all")
33     f:close()
34     ws = ws:match("%w+: UP")
35     if ws ~= nil then
36         return ws:gsub(": UP", "")
37     else
38         return ""
39     end
40 end
41
42 local function worker(args)
43     local args = args or {}
44     local timeout = args.timeout or 2
45     local iface = args.iface or net.get_device()
46     local units = args.units or 1024 --kb
47     local settings = args.settings or function() end
48
49     net.widget = wibox.widget.textbox('')
50
51     helpers.set_map(iface, true)
52
53     function net.update() 
54         if iface == "" then iface = net.get_device() end
55
56         carrier = helpers.first_line('/sys/class/net/' .. iface ..
57                                            '/carrier') or "0"
58         state = helpers.first_line('/sys/class/net/' .. iface ..
59                                            '/operstate') or "down"
60         local now_t = helpers.first_line('/sys/class/net/' .. iface ..
61                                            '/statistics/tx_bytes') or 0
62         local now_r = helpers.first_line('/sys/class/net/' .. iface ..
63                                            '/statistics/rx_bytes') or 0
64
65         sent = tostring((now_t - net.last_t) / timeout / units)
66         sent = string.gsub(string.format('%.1f', sent), ",", ".")
67
68         received = tostring((now_r - net.last_r) / timeout / units)
69         received = string.gsub(string.format('%.1f', received), ",", ".")
70
71         widget = net.widget
72         settings()
73
74         net.last_t = now_t
75         net.last_r = now_r
76
77         if carrier ~= "1"
78         then
79             if helpers.get_map(iface)
80             then
81                 n_title = iface
82                 if n_title == "" then n_title = "network" end
83                 naughty.notify({
84                     title    = n_title,
85                     text     = "no carrier",
86                     timeout  = 7,
87                     position = "top_left",
88                     icon     = helpers.icons_dir .. "no_net.png",
89                     fg       = notify_fg or "#FFFFFF"
90                 })
91                 helpers.set_map(iface, false)
92             end
93         else
94             helpers.set_map(iface, true)
95         end
96     end
97
98     helpers.newtimer(iface, timeout, net.update)
99
100     return net.widget
101 end
102
103 return setmetatable(net, { __call = function(_, ...) return worker(...) end })