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cal: sed spaces fix 2; #170 #174
[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 string       = { format = string.format,
17                        gsub   = string.gsub,
18                        match  = string.match }
19
20 local setmetatable = setmetatable
21
22 -- Network infos
23 -- lain.widgets.net
24
25 local function worker(args)
26     local net = { last_t = 0, last_r = 0 }
27
28     function net.get_device()
29         local ws = helpers.read_pipe("ip link show | cut -d' ' -f2,9")
30         ws = ws:match("%w+: UP") or ws:match("ppp%w+: UNKNOWN")
31         if ws ~= nil then
32             return ws:match("(%w+):")
33         else
34             return "network off"
35         end
36     end
37
38     local args     = args or {}
39     local timeout  = args.timeout or 2
40     local units    = args.units or 1024 --kb
41     local notify   = args.notify or "on"
42     local screen   = args.screen or 1
43     local settings = args.settings or function() end
44     local iface    = args.iface or net.get_device()
45
46     net.widget = wibox.widget.textbox('')
47
48     helpers.set_map(iface, true)
49
50     function update()
51         net_now = {}
52
53         if iface == "" or string.match(iface, "network off")
54         then
55             iface = net.get_device()
56         end
57
58         net_now.carrier = helpers.first_line('/sys/class/net/' .. iface ..
59                                            '/carrier') or "0"
60         net_now.state = helpers.first_line('/sys/class/net/' .. iface ..
61                                            '/operstate') or "down"
62         local now_t = helpers.first_line('/sys/class/net/' .. iface ..
63                                            '/statistics/tx_bytes') or 0
64         local now_r = helpers.first_line('/sys/class/net/' .. iface ..
65                                            '/statistics/rx_bytes') or 0
66
67         net_now.sent = (now_t - net.last_t) / timeout / units
68         net_now.sent = string.gsub(string.format('%.1f', net_now.sent), ",", ".")
69
70         net_now.received = (now_r - net.last_r) / timeout / units
71         net_now.received = string.gsub(string.format('%.1f', net_now.received), ",", ".")
72
73         widget = net.widget
74         settings()
75
76         net.last_t = now_t
77         net.last_r = now_r
78
79         if net_now.carrier ~= "1" and notify == "on"
80         then
81             if helpers.get_map(iface)
82             then
83                 naughty.notify({
84                     title    = iface,
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                     screen   = screen
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
101     return setmetatable(net, { __index = net.widget })
102 end
103
104 return setmetatable({}, { __call = function(_, ...) return worker(...) end })