73 lines
2.4 KiB
Lua
73 lines
2.4 KiB
Lua
---------------------------------------------------
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-- Licensed under the GNU General Public License v2
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-- * (c) 2010, 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 setmetatable = setmetatable
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local io = {
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open = io.open,
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popen = io.popen
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}
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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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-- 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}"] = 0,
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["{link}"] = 0,
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["{sign}"] = 0
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}
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-- Get data from iwconfig where available
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local iwconfig = "/sbin/iwconfig"
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local f = io.open(iwconfig, "rb")
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if not f then
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iwconfig = "/usr/sbin/iwconfig"
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else
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f:close()
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end
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local f = io.popen(iwconfig .." ".. iface .. " 2>&1")
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local iw = f:read("*all")
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f:close()
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-- iwconfig wasn't found, isn't executable, or non-wireless interface
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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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-- Output differs from system to system, some stats can be
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-- 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, we don't want to display Mb/s
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tonumber(string.match(iw, "Bit Rate[=:]([%s]?[%d%.]*)") or winfo["{rate}"])
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winfo["{link}"] = -- Link quality can contain a slash (32/70), match only the first number
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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, don't display decibel notation
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tonumber(string.match(iw, "Signal level[=:]([%-]?[%d]+)") 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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