-- always returns EISDIR if the file is a directory and was opened
-- for writing, so I think we're ok with a single open() here...
fd <- throwErrnoIfMinus1Retry "openFile"
- (c_open f (fromIntegral oflags) 0o666)
+ (c_open f oflags 0o666)
(fD,fd_type) <- mkFD fd iomode Nothing{-no stat-}
False{-not a socket-}
-- Terminal-related stuff
isTerminal :: FD -> IO Bool
-isTerminal fd = c_isatty (fdFD fd) >>= return.toBool
+isTerminal fd =
+#if defined(mingw32_HOST_OS)
+ is_console (fdFD fd) >>= return.toBool
+#else
+ c_isatty (fdFD fd) >>= return.toBool
+#endif
setEcho :: FD -> Bool -> IO ()
setEcho fd on = System.Posix.Internals.setEcho (fdFD fd) on
-- Reading and Writing
fdRead :: FD -> Ptr Word8 -> Int -> IO Int
-fdRead fd ptr bytes = do
- r <- readRawBufferPtr "GHC.IO.FD.fdRead" fd ptr 0 (fromIntegral bytes)
- return (fromIntegral r)
+fdRead fd ptr bytes
+ = readRawBufferPtr "GHC.IO.FD.fdRead" fd ptr 0 (fromIntegral bytes)
fdReadNonBlocking :: FD -> Ptr Word8 -> Int -> IO (Maybe Int)
fdReadNonBlocking fd ptr bytes = do
0 (fromIntegral bytes)
case r of
(-1) -> return (Nothing)
- n -> return (Just (fromIntegral n))
+ n -> return (Just n)
fdWrite :: FD -> Ptr Word8 -> Int -> IO ()
= fmap fromIntegral $ throwErrnoIfMinus1Retry loc $
if fdIsSocket fd
then c_safe_send (fdFD fd) (buf `plusPtr` off) len 0
- else c_safe_write (fdFD fd) (buf `plusPtr` off) len
+ else do
+ r <- c_safe_write (fdFD fd) (buf `plusPtr` off) len
+ when (r == -1) c_maperrno
+ return r
+ -- we don't trust write() to give us the correct errno, and
+ -- instead do the errno conversion from GetLastError()
+ -- ourselves. The main reason is that we treat ERROR_NO_DATA
+ -- (pipe is closing) as EPIPE, whereas write() returns EINVAL
+ -- for this case. We need to detect EPIPE correctly, because it
+ -- shouldn't be reported as an error when it happens on stdout.
+
+foreign import ccall unsafe "maperrno" -- in Win32Utils.c
+ c_maperrno :: IO ()
-- NOTE: "safe" versions of the read/write calls for use by the threaded RTS.
-- These calls may block, but that's ok.