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-----------------------------------
-- Author: Uli Schlachter --
-- Copyright 2009 Uli Schlachter --
-----------------------------------
local io = io
local tonumber = tonumber
local setmetatable = setmetatable
local lib = {
widget = require("obvious.lib.widget")
}
local function mem_usage()
local f = io.open("/proc/meminfo")
local ret = { }
for line in f:lines() do
if line:match('^MemTotal:') then
ret.total = tonumber(line:match('(%d+)'))
elseif line:match('^MemFree:') then
ret.free = tonumber(line:match('(%d+)'))
elseif line:match('^Buffers:') then
ret.bufs = tonumber(line:match('(%d+)'))
elseif line:match('^Cached:') then
ret.cached = tonumber(line:match('(%d+)'))
elseif line:match('^SwapTotal:') then
ret.swap_total = tonumber(line:match('(%d+)'))
elseif line:match('^SwapFree:') then
ret.swap_free = tonumber(line:match('(%d+)'))
end
end
f:close()
ret.avail = ret.free + ret.bufs + ret.cached
ret.used = ret.total - ret.avail
ret.perc = (100 / ret.total) * ret.used
ret.perc_not_free = (100 / ret.total) * (ret.total - ret.free)
ret.swap_used = ret.swap_total - ret.swap_free
ret.swap_perc = (100 / ret.swap_total) * ret.swap_used
-- The following values are returned:
-- * total Total Memory
-- * free Total free memory
-- * bufs Memory used for buffers
-- * cached Memory used for caches
-- * avail Memory not used by user space
-- * used Memory used by user space
-- * perc Percentage of memory used by user space
-- * perc_not_free Percentage of memory which is not free (different from 100 - perc!)
-- * swap_total Total swap space
-- * swap_free Free swap space
-- * swap_used Used swap space
-- * swap_perc Percentage of swap space used
return ret
end
local function get()
return mem_usage().perc
end
local function get_data_source()
local ret = {}
ret.max = 100
ret.get = get
return lib.widget.from_data_source(ret)
end
return setmetatable({
}, { __call = function (_, ...) return get_data_source(...) end })
-- vim:ft=lua:ts=2:sw=2:sts=2:tw=80:et
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