diff --git a/bin/logansh b/bin/logansh
new file mode 100755
index 0000000..7c8cd72
--- /dev/null
+++ b/bin/logansh
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+
+require 'logan/analyse'
+require 'active_support'
+require 'irb'
+
+$logan = LogAn::Analyse.new 'logs'
+begin
+	IRB.start __FILE__
+ensure
+	$logan.close
+end
diff --git a/lib/logan/analyse.rb b/lib/logan/analyse.rb
new file mode 100644
index 0000000..8c42404
--- /dev/null
+++ b/lib/logan/analyse.rb
@@ -0,0 +1,49 @@
+
+require 'logan/loglines'
+require 'time'
+
+class LogAn::Analyse
+	attr_reader :lines
+
+	def close
+		@lines.close
+	end
+
+	def initialize lines
+		@lines = String === lines ? LogAn::Loglines.new( lines) : lines
+	end
+
+	def extremum val
+		val = case val
+			when String  then Time.parse val
+			when Integer then Time.at val
+			when Time    then val
+			else raise ArgumentError, "Unknwon type: #{val}", caller[ 1..-1]
+			end
+	end
+
+	def timerange min, max = nil
+		exend = false
+		min, max, exend = min.min, min.max, min.exclude_end?  if Range === min
+		Range.new extremum( min), extremum( max), exend
+	end
+
+	def dbs min, max = nil, &exe
+		return Enumerator.new( self, :dbs, min, max)  unless exe
+		range = timerange min, max
+		@lines.rdb.each &exe
+	end
+
+	def search min, max = nil, &exe
+		dbs = @lines.dbs
+		range = timerange min, max
+		@lines.rdb.each do |time, db|
+			dbs[ UUIDTools::UUID.parse_raw( db)].each &exe  if range === Time.at( *time.unpack( 'N'))
+		end
+	end
+	alias [] search
+
+	def each min, max = nil, &exe
+		exe ? search( min, max, &exe) : Enumerator.new( self, :search, min, max)
+	end
+end