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Diffstat (limited to 'dio.lua')
| -rw-r--r-- | dio.lua | 73 |
1 files changed, 73 insertions, 0 deletions
@@ -0,0 +1,73 @@ +---------------------------------------------------------- +-- Licensed under the GNU General Public License version 2 +-- * Copyright (C) 2009 Adrian C. <anrxc_sysphere_org> +---------------------------------------------------------- + +-- {{{ Grab environment +local type = type +local ipairs = ipairs +local io = { open = io.open } +local math = { floor = math.floor } +local table = { insert = table.insert } +-- }}} + + +-- Disk I/O: provides I/O statistics for requsted storage devices +module("vicious.dio") + + +-- Initialise function tables +local disk_usage = {} +local disk_total = {} + +-- {{{ Disk I/O widget type +function worker(format, disk) + -- Get /proc/diskstats + local f = io.open("/proc/diskstats") + local disk_lines = {} + + -- Format data + for line in f:lines() do + if line:match("("..disk..")%s") then + -- Todo: find a way to do this + --for stat in line:gmatch("%s([%d]+)") do + -- table.insert(disk_lines, stat) + --end + -- + -- Skip first two matches + local stat = line:gmatch("%s([%d]+)") + stat() + stat() + -- Store the rest + for i = 1, 11 do + table.insert(disk_lines, stat()) + end + end + end + f:close() + + -- Ensure tables are initialized correctly + while #disk_total < #disk_lines do + table.insert(disk_total, 0) + end + + -- Setup tables + local diff_total = {} + + for i, v in ipairs(disk_lines) do + -- Diskstats are absolute, substract our last reading + diff_total[i] = v - disk_total[i] + + -- Store totals + disk_total[i] = v + end + + -- Calculate I/O + disk_usage["{raw}"] = diff_total[7] + diff_total[3] + -- Divide "sectors read" by 2 and 1024 to get KB and MB + disk_usage["{kb}"] = math.floor(diff_total[7] + diff_total[3])/2 + disk_usage["{mb}"] = math.floor(diff_total[7] + diff_total[3])/1024 + + return disk_usage +end +-- }}} |