From 1b2418578acd5b718dc09bc7bf22018ff6215ed7 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@helsinki.at>
Date: Sat, 5 Mar 2011 23:03:28 +0000
Subject: added some comments


diff --git a/noprml/noprml.lua b/noprml/noprml.lua
index 963f667..72267ae 100755
--- a/noprml/noprml.lua
+++ b/noprml/noprml.lua
@@ -1,30 +1,38 @@
 #!/usr/bin/lua
+--
+-- send now and next cart# and length to nopsyncd
+--  this script should be called by the now/next macro cart
+--  the arguments should be:  now# nowlen next# nextlen
+--
 
 local queue_name = "/rhnop"
 
 mq = require "luamq"
 
+-- reading timestamp (milliseconds since epoch)
 local p = assert(io.popen("/bin/date --utc '+%s %N'" , 'r'))
 local time = assert(p:read('*l'))
 p:close()
 local s, ns = assert(string.match(time, "([0-9]+) ([0-9]+)"))
+local timestamp = s*1000 + math.floor(ns/1000000)
 
-timestamp = s*1000 + math.floor(ns/1000000)
-
+-- check arguments
 if #arg < 4 then
-   io.stderr:write("too few parameters")
+   io.stderr:write("too few parameters\n")
    os.exit(1)
 end
 
+-- open message queue
 local q, err = mq.create(queue_name, "wo")
 if q == nil then
-   io.stderr:write("creation of message queue failed: " .. err)
+   io.stderr:write("creation of message queue failed: " .. err .. "\n")
    os.exit(1)
 end
 
+-- send out message to nopsyncd
 local result, err = mq.send(q, timestamp .. " " .. arg[1] .. " " .. arg[2] .. " " .. arg[3] .. " " .. arg[4], 0)
 if result == nil then
-   io.stderr:write("sending message failed: " .. err)
+   io.stderr:write("sending message failed: " .. err .. "\n")
    os.exit(2)
 end
 
-- 
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