diff --git a/Javasf.cabal b/Javasf.cabal
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+++ b/Javasf.cabal
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+Name:               Javasf
+Version:            0.0.1
+Author:             Tony Morris <ʇǝu˙sıɹɹoɯʇ@ןןǝʞsɐɥ>
+Maintainer:         Tony Morris
+Copyright:          Tony Morris
+License:            BSD3
+License-File:       LICENSE
+Synopsis:           A utility to print the SourceFile attribute of one or more Java class files.
+Category:           Language
+Description:
+  Installs a javasf executable to print the @SourceFile@ attribute of one or more Java class files.
+  .
+  For example:
+  .
+  @
+    \> javasf ThisClass.class ThatClass.class
+
+    ThisClass.java
+
+    ThatClass.java
+  @
+  .
+  Java VM Specification 4.7.7 The @SourceFile@ Attribute
+  .
+  <http://java.sun.com/docs/books/jvms/second_edition/html/ClassFile.doc.html#79868>
+Cabal-version:      >= 1.2
+Build-Type:         Simple
+
+Flag small_base
+  Description:      Choose the new, split-up base package.
+
+Executable javasf
+  Main-Is:
+                    Main.hs
+  Build-Depends:
+                    base < 5 && >= 3
+                    , language-java-classfile
+                    , binary
+                    , bytestring
+
+  GHC-Options:
+                    -Wall
+
+  Other-Modules:
+                    Language.Java.Javasf
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
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+Copyright 2009 Tony Morris
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+3. Neither the name of the author nor the names of his contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
diff --git a/Language/Java/Javasf.hs b/Language/Java/Javasf.hs
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+++ b/Language/Java/Javasf.hs
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+module Language.Java.Javasf where
+
+import qualified Data.ByteString.Lazy as B
+import Data.Binary.Get
+import Language.Java.ClassFile
+import Data.Maybe
+
+sourceFile ::
+  B.ByteString
+  -> Maybe String
+sourceFile =
+  sourcePath . snd . runGet getClass
+
+showSourceFile ::
+  B.ByteString
+  -> String
+showSourceFile x =
+  "?Unknown?" `fromMaybe` sourceFile x
+
+javasf ::
+  [FilePath]
+  -> IO ()
+javasf =
+  mapM_ (\file -> putStrLn . showSourceFile =<< B.readFile file)
+
diff --git a/Main.hs b/Main.hs
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+++ b/Main.hs
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+module Main where
+
+import Language.Java.Javasf
+import System.Environment
+
+main ::
+  IO ()
+main =
+  do a <- getArgs
+     if null a
+        then mapM_ putStrLn
+                     [
+                       "<javasf> Copyright 2010 Tony Morris"
+                     , "This software is made available under a BSD3 open source license"
+                     , []
+                     , "Prints the SourceFile attribute of one or more Java class files."
+                     , []
+                     , "javasf FILE1 [FILE2...]"
+                     ]
+        else javasf a
diff --git a/Setup.hs b/Setup.hs
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+++ b/Setup.hs
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+import Distribution.Simple
+main = defaultMain
+