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---------------------------------------------------
-- Licensed under the GNU General Public License v2
-- * (c) 2010, Adrian C. <anrxc@sysphere.org>
-- * (c) 2009, Lucas de Vries <lucas@glacicle.com>
---------------------------------------------------
-- {{{ Grab environment
local tonumber = tonumber
local os = { time = os.time }
local io = { open = io.open }
local setmetatable = setmetatable
local string = { match = string.match }
local helpers = require("vicious.helpers")
-- }}}
-- Net: provides usage statistics for all network interfaces
module("vicious.net")
-- Initialise function tables
local nets = {}
-- Variable definitions
local unit = { ["b"] = 1, ["kb"] = 1024,
["mb"] = 1024^2, ["gb"] = 1024^3
}
-- {{{ Net widget type
local function worker(format)
-- Get /proc/net/dev
local f = io.open("/proc/net/dev")
local args = {}
for line in f:lines() do
-- Match wmaster0 as well as rt0 (multiple leading spaces)
if string.match(line, "^[%s]?[%s]?[%s]?[%s]?[%w]+:") then
local name = string.match(line, "^[%s]?[%s]?[%s]?[%s]?([%w]+):")
-- Received bytes, first value after the name
local recv = tonumber(string.match(line, ":[%s]*([%d]+)"))
-- Transmited bytes, 7 fields from end of the line
local send = tonumber(string.match(line,
"([%d]+)%s+%d+%s+%d+%s+%d+%s+%d+%s+%d+%s+%d+%s+%d$"))
helpers.uformat(args, name .. " rx", recv, unit)
helpers.uformat(args, name .. " tx", send, unit)
if nets[name] == nil then
-- Default values on the first run
nets[name] = {}
helpers.uformat(args, name .. " down", 0, unit)
helpers.uformat(args, name .. " up", 0, unit)
nets[name].time = os.time()
else -- Net stats are absolute, substract our last reading
local interval = os.time() - nets[name].time > 0 and
os.time() - nets[name].time or 1
nets[name].time = os.time()
local down = (recv - nets[name][1]) / interval
local up = (send - nets[name][2]) / interval
helpers.uformat(args, name .. " down", down, unit)
helpers.uformat(args, name .. " up", up, unit)
end
-- Store totals
nets[name][1] = recv
nets[name][2] = send
end
end
f:close()
return args
end
-- }}}
setmetatable(_M, { __call = function(_, ...) return worker(...) end })
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