1 files changed, 56 insertions, 0 deletions
diff --git a/widgets/raid.lua b/widgets/raid.lua
new file mode 100644
index 0000000..eaf7825
--- /dev/null
+++ b/widgets/raid.lua
@@ -0,0 +1,56 @@
+-----------------------------------------------------
+-- Licensed under the GNU General Public License v2
+--  * (c) 2010, Hagen Schink <troja84@googlemail.com>
+-----------------------------------------------------
+
+-- {{{ Grab environment
+local io = { lines = io.lines }
+local setmetatable = setmetatable
+local string = {
+    len = string.len,
+    sub = string.sub,
+    match = string.match,
+    gmatch = string.gmatch
+}
+-- }}}
+
+
+-- Raid: provides state information for a requested RAID array
+module("vicious.widgets.raid")
+
+
+-- {{{ RAID widget type
+local function worker(format, warg)
+    if not warg then return end
+
+    local found = false
+    local mddev = {}
+    mddev[warg] = {
+        ["active"]   = 0,
+        ["assigned"] = 0
+    }
+
+    -- Linux manual page: md(4)
+    for line in io.lines("/proc/mdstat") do
+        if found then
+            local updev = string.match(line, "%[[_U]+%]")
+
+            for i in string.gmatch(updev, "U") do
+                mddev[warg]["active"] = mddev[warg]["active"] + 1
+            end
+
+            break
+        elseif string.sub(line, 1, string.len(warg)) == warg then
+            found = true
+
+            for i in string.gmatch(line, "%[%d%]") do
+                mddev[warg]["assigned"] = mddev[warg]["assigned"] + 1
+            end
+        end
+    end
+
+    return {mddev[warg]["assigned"], mddev[warg]["active"]}
+end
+-- }}}
+
+setmetatable(_M, { __call = function(_, ...) return worker(...) end })