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---------------------------------------------------
-- Licensed under the GNU General Public License v2
-- * (c) 2010, Adrian C. <anrxc@sysphere.org>
---------------------------------------------------
-- {{{ Grab environment
local tonumber = tonumber
local math = { ceil = math.ceil }
local setmetatable = setmetatable
local helpers = require("vicious.helpers")
local io = {
open = io.open,
popen = io.popen
}
local string = {
find = string.find,
match = string.match
}
-- }}}
-- Wifi: provides wireless information for a requested interface
-- vicious.widgets.wifi
local wifi = {}
-- {{{ Variable definitions
local iwconfig = "iwconfig"
local iwcpaths = { "/sbin", "/usr/sbin", "/usr/local/sbin", "/usr/bin" }
-- }}}
-- {{{ Wireless widget type
local function worker(format, warg)
if not warg then return end
-- Default values
local winfo = {
["{ssid}"] = "N/A",
["{mode}"] = "N/A",
["{chan}"] = 0,
["{rate}"] = 0,
["{link}"] = 0,
["{linp}"] = 0,
["{sign}"] = 0
}
-- Sbin paths aren't in user PATH, search for the binary
if iwconfig == "iwconfig" then
for _, p in ipairs(iwcpaths) do
local f = io.open(p .. "/iwconfig", "rb")
if f then
iwconfig = p .. "/iwconfig"
f:close()
break
end
end
end
-- Get data from iwconfig where available
local f = io.popen(iwconfig .." ".. helpers.shellquote(warg) .. " 2>&1")
local iw = f:read("*all")
f:close()
-- iwconfig wasn't found, isn't executable, or non-wireless interface
if iw == nil or string.find(iw, "No such device") then
return winfo
end
-- Output differs from system to system, some stats can be
-- separated by =, and not all drivers report all stats
winfo["{ssid}"] = -- SSID can have almost anything in it
helpers.escape(string.match(iw, 'ESSID[=:]"(.-)"') or winfo["{ssid}"])
winfo["{mode}"] = -- Modes are simple, but also match the "-" in Ad-Hoc
string.match(iw, "Mode[=:]([%w%-]*)") or winfo["{mode}"]
winfo["{chan}"] = -- Channels are plain digits
tonumber(string.match(iw, "Channel[=:]([%d]+)") or winfo["{chan}"])
winfo["{rate}"] = -- Bitrate can start with a space, we don't want to display Mb/s
tonumber(string.match(iw, "Bit Rate[=:]([%s]?[%d%.]*)") or winfo["{rate}"])
winfo["{link}"] = -- Link quality can contain a slash (32/70), match only the first number
tonumber(string.match(iw, "Link Quality[=:]([%d]+)") or winfo["{link}"])
winfo["{sign}"] = -- Signal level can be a negative value, don't display decibel notation
tonumber(string.match(iw, "Signal level[=:]([%-]?[%d]+)") or winfo["{sign}"])
-- Link quality percentage if quality was available
if winfo["{link}"] ~= 0 then winfo["{linp}"] = math.ceil(winfo["{link}"] / 0.7) end
return winfo
end
-- }}}
return setmetatable(wifi, { __call = function(_, ...) return worker(...) end })
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