66 lines
2.3 KiB
Lua
66 lines
2.3 KiB
Lua
---------------------------------------------------
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-- Licensed under the GNU General Public License v2
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-- * (c) 2009, Adrian C. <anrxc.sysphere.org>
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---------------------------------------------------
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-- {{{ Grab environment
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local tonumber = tonumber
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local io = { popen = io.popen }
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local setmetatable = setmetatable
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local string = {
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find = string.find,
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match = string.match
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}
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-- }}}
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-- Wifi: provides wireless information for a requested interface
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module("vicious.wifi")
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-- {{{ Wireless widget type
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local function worker(format, iface)
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-- Get data from iwconfig (where available)
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local f = io.popen("iwconfig " .. iface)
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local iw = f:read("*all")
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f:close()
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-- Default values
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local winfo = {
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["{ssid}"] = "N/A",
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["{mode}"] = "N/A",
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["{chan}"] = "N/A",
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["{rate}"] = "N/A",
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["{link}"] = 0,
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["{sign}"] = "N/A"
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}
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-- Check if iwconfig wasn't found, can't be executed or the
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-- interface is not a wireless one
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if iw == nil or string.find(iw, "No such device") then
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return winfo
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end
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-- The output differs from system to system, some stats can
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-- be separated by =, and not all drivers report all stats
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winfo["{ssid}"] = -- SSID can have almost anything in it
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string.match(iw, 'ESSID[=:]"([%w%p]+[%s]*[%w%p]*]*)"') or winfo["{ssid}"]
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winfo["{mode}"] = -- Modes are simple, but also match the "-" in Ad-Hoc
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string.match(iw, "Mode[=:]([%w%-]*)") or winfo["{mode}"]
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winfo["{chan}"] = -- Channels are plain digits
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tonumber(string.match(iw, "Channel[=:]([%d]+)") or winfo["{chan}"])
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winfo["{rate}"] = -- Bitrate can start with a space and we want to display Mb/s
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string.match(iw, "Bit Rate[=:]([%s]?[%d%.]*[%s][%/%a]+)") or winfo["{rate}"]
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-- winfo["{link}"] = -- Link quality can contain a slash: 32/100
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-- string.match(iw, "Link Quality[=:]([%d]+[%/%d]*)") or winfo["{link}"]
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winfo["{link}"] = -- * match only the first number, also suitable for a progressbar
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tonumber(string.match(iw, "Link Quality[=:]([%d]+)") or winfo["{link}"])
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winfo["{sign}"] = -- Signal level can be a negative value, also display decibel notation
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string.match(iw, "Signal level[=:]([%-%d]+[%s][%a]*)") or winfo["{sign}"]
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return winfo
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end
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-- }}}
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setmetatable(_M, { __call = function(_, ...) return worker(...) end })
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