[project @ 2005-01-21 15:12:21 by simonmar]

hClose on stdin,stdout,stderr now actually closes the file
descriptor.  Before, there was no way to actually close these file
descriptors, which might be necessary in some cases - especially when
stdin/stdout are pipes and you need to indicate to the other end of
the pipe that you've finished I/O, but without exiting the program.

diff --git a/GHC/Handle.hs b/GHC/Handle.hs
index a822696..16a9a2f 100644 (file)
--- a/GHC/Handle.hs
+++ b/GHC/Handle.hs
@@ -1039,11 +1039,9 @@ hClose_handle_ handle_ = do
         c_fd = fromIntegral fd
 
     -- close the file descriptor, but not when this is the read
-    -- side of a duplex handle, and not when this is one of the
-    -- std file handles.
+    -- side of a duplex handle.
     case haOtherSide handle_ of
       Nothing -> 
-         when (fd /= fd_stdin && fd /= fd_stdout && fd /= fd_stderr) $
                  throwErrnoIfMinus1Retry_ "hClose" 
 #ifdef mingw32_TARGET_OS
                                (closeFd (haIsStream handle_) c_fd)