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08c73663e4ec4eccbd0bc1172ed1c169455f9ebe
[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 "network off"
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 notify = args.notify or "on"
48     local settings = args.settings or function() end
49
50     net.widget = wibox.widget.textbox('')
51
52     helpers.set_map(iface, true)
53
54     function update()
55         net_now = {}
56
57         if iface == "" then iface = net.get_device() end
58
59         net_now.carrier = helpers.first_line('/sys/class/net/' .. iface ..
60                                            '/carrier') or "0"
61         net_now.state = helpers.first_line('/sys/class/net/' .. iface ..
62                                            '/operstate') or "down"
63         local now_t = helpers.first_line('/sys/class/net/' .. iface ..
64                                            '/statistics/tx_bytes') or 0
65         local now_r = helpers.first_line('/sys/class/net/' .. iface ..
66                                            '/statistics/rx_bytes') or 0
67
68         net_now.sent = tostring((now_t - net.last_t) / timeout / units)
69         net_now.sent = string.gsub(string.format('%.1f', net_now.sent), ",", ".")
70
71         net_now.received = tostring((now_r - net.last_r) / timeout / units)
72         net_now.received = string.gsub(string.format('%.1f', net_now.received), ",", ".")
73
74         widget = net.widget
75         settings()
76
77         net.last_t = now_t
78         net.last_r = now_r
79
80         if net_now.carrier ~= "1" and notify == "on"
81         then
82             if helpers.get_map(iface)
83             then
84                 naughty.notify({
85                     title    = iface,
86                     text     = "no carrier",
87                     timeout  = 7,
88                     position = "top_left",
89                     icon     = helpers.icons_dir .. "no_net.png",
90                     fg       = notify_fg or "#FFFFFF"
91                 })
92                 helpers.set_map(iface, false)
93             end
94         else
95             helpers.set_map(iface, true)
96         end
97     end
98
99     helpers.newtimer(iface, timeout, update)
100     return net.widget
101 end
102
103 return setmetatable(net, { __call = function(_, ...) return worker(...) end })