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a4b1097b1b52616cbb02793de1c4c81dca1ed8be
[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 local naughty      = require("naughty")
12 local wibox        = require("wibox")
13
14 local string       = { format = string.format,
15                        gsub   = string.gsub,
16                        match  = string.match }
17
18 local setmetatable = setmetatable
19
20 -- Network infos
21 -- lain.widgets.net
22
23 local function worker(args)
24     local net = { last_t = 0, last_r = 0 }
25
26     function net.get_device()
27         local ws = helpers.read_pipe("ip link show | cut -d' ' -f2,9")
28         ws = ws:match("%w+: UP") or ws:match("ppp%w+: UNKNOWN")
29         if ws  then return ws:match("(%w+):")
30         else return "network off" end
31     end
32
33     local args     = args or {}
34     local timeout  = args.timeout or 2
35     local units    = args.units or 1024 --kb
36     local notify   = args.notify or "on"
37     local screen   = args.screen or 1
38     local settings = args.settings or function() end
39     local iface    = args.iface or net.get_device()
40
41     net.widget = wibox.widget.textbox('')
42
43     helpers.set_map(iface, true)
44
45     function update()
46         net_now = {}
47
48         if iface == "" or string.match(iface, "network off")
49         then
50             iface = net.get_device()
51         end
52
53         net_now.carrier  = helpers.first_line(string.format('/sys/class/net/%s/carrier', iface)) or '0'
54         net_now.state    = helpers.first_line(string.format('/sys/class/net/%s/operstate', iface)) or 'down'
55
56         local now_t      = helpers.first_line(string.format('/sys/class/net/%s/statistics/tx_bytes', iface)) or 0
57         local now_r      = helpers.first_line(string.format('/sys/class/net/%s/statistics/rx_bytes', iface)) or 0
58
59         if now_t ~= net.last_t or now_r ~= net.last_r then  
60             net_now.sent     = (now_t - net.last_t) / timeout / units
61             net_now.sent     = string.gsub(string.format('%.1f', net_now.sent), ',', '.')
62             net_now.received = (now_r - net.last_r) / timeout / units
63             net_now.received = string.gsub(string.format('%.1f', net_now.received), ',', '.')
64
65             widget = net.widget
66             settings()
67
68             net.last_t = now_t
69             net.last_r = now_r
70         end
71
72         if not string.match(net_now.carrier, "1") and notify == "on"
73         then
74             if helpers.get_map(iface)
75             then
76                 naughty.notify({
77                     title    = iface,
78                     text     = "no carrier",
79                     icon     = helpers.icons_dir .. "no_net.png",
80                     screen   = screen
81                 })
82                 helpers.set_map(iface, false)
83             end
84         else
85             helpers.set_map(iface, true)
86         end
87     end
88
89     helpers.newtimer(iface, timeout, update)
90
91     return setmetatable(net, { __index = net.widget })
92 end
93
94 return setmetatable({}, { __call = function(_, ...) return worker(...) end })