From 237470c8f45190b213e3a173ce6ae1a74b3e11fe Mon Sep 17 00:00:00 2001
From: "Adrian C. (anrxc)" <anrxc@sysphere.org>
Date: Sun, 14 Mar 2010 01:55:33 +0100
Subject: API: transform widgets namespace table to a directory

---
 widgets/mem.lua | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 widgets/mem.lua

(limited to 'widgets/mem.lua')

diff --git a/widgets/mem.lua b/widgets/mem.lua
new file mode 100644
index 0000000..c2f5886
--- /dev/null
+++ b/widgets/mem.lua
@@ -0,0 +1,49 @@
+---------------------------------------------------
+-- 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 io = { lines = io.lines }
+local setmetatable = setmetatable
+local math = { floor = math.floor }
+local string = { gmatch = string.gmatch }
+-- }}}
+
+
+-- Mem: provides RAM and Swap usage statistics
+module("vicious.widgets.mem")
+
+
+-- {{{ Memory widget type
+local function worker(format)
+    local mem = { buf = {}, swp = {} }
+
+    -- Get MEM info
+    for line in io.lines("/proc/meminfo") do
+        for k, v in string.gmatch(line, "([%a]+):[%s]+([%d]+).+") do
+            if     k == "MemTotal"  then mem.total = math.floor(v/1024)
+            elseif k == "MemFree"   then mem.buf.f = math.floor(v/1024)
+            elseif k == "Buffers"   then mem.buf.b = math.floor(v/1024)
+            elseif k == "Cached"    then mem.buf.c = math.floor(v/1024)
+            elseif k == "SwapTotal" then mem.swp.t = math.floor(v/1024)
+            elseif k == "SwapFree"  then mem.swp.f = math.floor(v/1024)
+            end
+        end
+    end
+
+    -- Calculate memory percentage
+    mem.free  = mem.buf.f + mem.buf.b + mem.buf.c
+    mem.inuse = mem.total - mem.free
+    mem.usep  = math.floor(mem.inuse / mem.total * 100)
+    -- Calculate swap percentage
+    mem.swp.inuse = mem.swp.t - mem.swp.f
+    mem.swp.usep  = math.floor(mem.swp.inuse / mem.swp.t * 100)
+
+    return {mem.usep,     mem.inuse,     mem.total, mem.free,
+            mem.swp.usep, mem.swp.inuse, mem.swp.t, mem.swp.f}
+end
+-- }}}
+
+setmetatable(_M, { __call = function(_, ...) return worker(...) end })
-- 
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