vicious/widgets/os.lua

74 lines
2.1 KiB
Lua

---------------------------------------------------
-- Licensed under the GNU General Public License v2
-- * (c) 2010, Adrian C. <anrxc@sysphere.org>
---------------------------------------------------
-- {{{ Grab environment
local pairs = pairs
local tonumber = tonumber
local io = { popen = io.popen }
local math = { ceil = math.ceil }
local los = { getenv = os.getenv }
local setmetatable = setmetatable
local helpers = require("vicious.helpers")
local string = {
gsub = string.gsub,
match = string.match
}
-- }}}
-- OS: provides operating system information
-- vicious.widgets.os
local os = {}
-- {{{ Operating system widget type
local function worker(format)
local system = {
["ostype"] = "N/A",
["hostname"] = "N/A",
["osrelease"] = "N/A",
["username"] = "N/A",
["entropy"] = "N/A",
["entropy_p"] = "N/A"
}
-- Linux manual page: uname(2)
local kernel = helpers.pathtotable("/proc/sys/kernel")
for k, v in pairs(system) do
if kernel[k] then
system[k] = string.gsub(kernel[k], "[%s]*$", "")
end
end
-- BSD manual page: uname(1)
if system["ostype"] == "N/A" then
local f = io.popen("uname -snr")
local uname = f:read("*line")
f:close()
system["ostype"], system["hostname"], system["osrelease"] =
string.match(uname, "([%w]+)[%s]([%w%p]+)[%s]([%w%p]+)")
end
-- Linux manual page: random(4)
if kernel.random then
-- Linux 2.6 default entropy pool is 4096-bits
local poolsize = tonumber(kernel.random.poolsize)
-- Get available entropy and calculate percentage
system["entropy"] = tonumber(kernel.random.entropy_avail)
system["entropy_p"] = math.ceil(system["entropy"] * 100 / poolsize)
end
-- Get user from the environment
system["username"] = los.getenv("USER")
return {system["ostype"], system["osrelease"], system["username"],
system["hostname"], system["entropy"], system["entropy_p"]}
end
-- }}}
return setmetatable(os, { __call = function(_, ...) return worker(...) end })