bug in unix/System/Posix/Files.hsc

[Volker Stolz]

In local.glasgow-haskell-users, you wrote:
> readSymbolicLink is broken, it assumes that readlink(2) null terminates its
> result when it doesn't. this causes all sorts of badness.

This should fix it, although all my CVS trees are hosed right now
(now how did I manage to break something in the backup tree?) and I
can't actually test it:

Index: Files.hsc
===================================================================
RCS file: /home/cvs/root/fptools/libraries/unix/System/Posix/Files.hsc,v
retrieving revision 1.3
diff -u -r1.3 Files.hsc
--- Files.hsc	2002/10/08 08:03:02	1.3
+++ Files.hsc	2002/11/15 09:02:03
@@ -352,10 +352,10 @@
 readSymbolicLink :: FilePath -> IO FilePath
 readSymbolicLink file =
   allocaArray0 (#const PATH_MAX) $ \buf -> do
-    withCString file $ \s ->
-      throwErrnoIfMinus1_ "readSymbolicLink" $
+    withCString file $ \s -> do
+      len <- throwErrnoIfMinus1 "readSymbolicLink" $ 
 	c_readlink s buf (#const PATH_MAX)
-    peekCString buf
+      peekCStringLen (buf,fromIntegral len)
 
 foreign import ccall unsafe "readlink"
   c_readlink :: CString -> CString -> CInt -> IO CInt
-- 
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