X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=System%2FPosix%2FInternals.hs;h=6eddda63b4757ad36c4fcd9db8f6f1cbf2880131;hb=3907800d3a9f26fba88b0605af197a7d2866a0eb;hp=e03c5ddb7a2529179d84f539d3252fd13806d8de;hpb=553e39786807a03e5072a717d722d56d646cbde8;p=ghc-base.git diff --git a/System/Posix/Internals.hs b/System/Posix/Internals.hs index e03c5dd..6eddda6 100644 --- a/System/Posix/Internals.hs +++ b/System/Posix/Internals.hs @@ -1,4 +1,5 @@ {-# OPTIONS_GHC -fno-implicit-prelude #-} +{-# OPTIONS_HADDOCK hide #-} ----------------------------------------------------------------------------- -- | @@ -14,7 +15,7 @@ -- This library is built on *every* platform, including Win32. -- -- Non-posix compliant in order to support the following features: --- * S_ISSOCK (no sockets in POSIX) +-- * S_ISSOCK (no sockets in POSIX) -- ----------------------------------------------------------------------------- @@ -32,18 +33,19 @@ import Foreign.C import Data.Bits import Data.Maybe -#ifdef __GLASGOW_HASKELL__ +#if __GLASGOW_HASKELL__ import GHC.Base import GHC.Num import GHC.Real import GHC.IOBase +#elif __HUGS__ +import Hugs.Prelude (IOException(..), IOErrorType(..)) +import Hugs.IO (IOMode(..)) #else import System.IO #endif #ifdef __HUGS__ -import Hugs.Prelude (IOException(..), IOErrorType(..)) - {-# CFILES cbits/PrelIOUtils.c cbits/dirUtils.c cbits/consUtils.c #-} #endif @@ -60,8 +62,8 @@ type CSigaction = () type CSigset = () type CStat = () type CTermios = () -type CTm = () -type CTms = () +type CTm = () +type CTms = () type CUtimbuf = () type CUtsname = () @@ -76,16 +78,16 @@ fdFileSize :: FD -> IO Integer fdFileSize fd = allocaBytes sizeof_stat $ \ p_stat -> do throwErrnoIfMinus1Retry "fileSize" $ - c_fstat fd p_stat + c_fstat fd p_stat c_mode <- st_mode p_stat :: IO CMode if not (s_isreg c_mode) - then return (-1) - else do - c_size <- st_size p_stat :: IO COff + then return (-1) + else do + c_size <- st_size p_stat return (fromIntegral c_size) data FDType = Directory | Stream | RegularFile | RawDevice - deriving (Eq) + deriving (Eq) fileType :: FilePath -> IO FDType fileType file = @@ -97,27 +99,33 @@ fileType file = -- NOTE: On Win32 platforms, this will only work with file descriptors -- referring to file handles. i.e., it'll fail for socket FDs. -fdType :: FD -> IO FDType -fdType fd = +fdStat :: FD -> IO (FDType, CDev, CIno) +fdStat fd = allocaBytes sizeof_stat $ \ p_stat -> do throwErrnoIfMinus1Retry "fdType" $ - c_fstat fd p_stat - statGetType p_stat + c_fstat fd p_stat + ty <- statGetType p_stat + dev <- st_dev p_stat + ino <- st_ino p_stat + return (ty,dev,ino) + +fdType :: FD -> IO FDType +fdType fd = do (ty,_,_) <- fdStat fd; return ty statGetType p_stat = do c_mode <- st_mode p_stat :: IO CMode case () of - _ | s_isdir c_mode -> return Directory + _ | s_isdir c_mode -> return Directory | s_isfifo c_mode || s_issock c_mode || s_ischr c_mode - -> return Stream - | s_isreg c_mode -> return RegularFile - -- Q: map char devices to RawDevice too? - | s_isblk c_mode -> return RawDevice - | otherwise -> ioError ioe_unknownfiletype + -> return Stream + | s_isreg c_mode -> return RegularFile + -- Q: map char devices to RawDevice too? + | s_isblk c_mode -> return RawDevice + | otherwise -> ioError ioe_unknownfiletype ioe_unknownfiletype = IOError Nothing UnsupportedOperation "fdType" - "unknown file type" Nothing + "unknown file type" Nothing #if __GLASGOW_HASKELL__ && (defined(mingw32_HOST_OS) || defined(__MINGW32__)) closeFd :: Bool -> CInt -> IO CInt @@ -132,14 +140,12 @@ foreign import stdcall unsafe "HsBase.h closesocket" fdGetMode :: FD -> IO IOMode fdGetMode fd = do #if defined(mingw32_HOST_OS) || defined(__MINGW32__) - -- XXX: this code is *BROKEN*, _setmode only deals with O_TEXT/O_BINARY - flags1 <- throwErrnoIfMinus1Retry "fdGetMode" - (c__setmode fd (fromIntegral o_WRONLY)) - flags <- throwErrnoIfMinus1Retry "fdGetMode" - (c__setmode fd (fromIntegral flags1)) + -- We don't have a way of finding out which flags are set on FDs + -- on Windows, so make a handle that thinks that anything goes. + let flags = o_RDWR #else flags <- throwErrnoIfMinus1Retry "fdGetMode" - (c_fcntl_read fd const_f_getfl) + (c_fcntl_read fd const_f_getfl) #endif let wH = (flags .&. o_WRONLY) /= 0 @@ -147,11 +153,11 @@ fdGetMode fd = do rwH = (flags .&. o_RDWR) /= 0 mode - | wH && aH = AppendMode - | wH = WriteMode - | rwH = ReadWriteMode - | otherwise = ReadMode - + | wH && aH = AppendMode + | wH = WriteMode + | rwH = ReadWriteMode + | otherwise = ReadMode + return mode -- --------------------------------------------------------------------------- @@ -167,8 +173,8 @@ setEcho fd on = do tcSetAttr fd $ \ p_tios -> do c_lflag <- c_lflag p_tios :: IO CTcflag let new_c_lflag - | on = c_lflag .|. fromIntegral const_echo - | otherwise = c_lflag .&. complement (fromIntegral const_echo) + | on = c_lflag .|. fromIntegral const_echo + | otherwise = c_lflag .&. complement (fromIntegral const_echo) poke_c_lflag p_tios (new_c_lflag :: CTcflag) getEcho :: FD -> IO Bool @@ -184,49 +190,49 @@ setCooked fd cooked = -- turn on/off ICANON c_lflag <- c_lflag p_tios :: IO CTcflag let new_c_lflag | cooked = c_lflag .|. (fromIntegral const_icanon) - | otherwise = c_lflag .&. complement (fromIntegral const_icanon) + | otherwise = c_lflag .&. complement (fromIntegral const_icanon) poke_c_lflag p_tios (new_c_lflag :: CTcflag) -- set VMIN & VTIME to 1/0 respectively when (not cooked) $ do c_cc <- ptr_c_cc p_tios - let vmin = (c_cc `plusPtr` (fromIntegral const_vmin)) :: Ptr Word8 - vtime = (c_cc `plusPtr` (fromIntegral const_vtime)) :: Ptr Word8 - poke vmin 1 - poke vtime 0 + let vmin = (c_cc `plusPtr` (fromIntegral const_vmin)) :: Ptr Word8 + vtime = (c_cc `plusPtr` (fromIntegral const_vtime)) :: Ptr Word8 + poke vmin 1 + poke vtime 0 tcSetAttr :: FD -> (Ptr CTermios -> IO a) -> IO a tcSetAttr fd fun = do allocaBytes sizeof_termios $ \p_tios -> do - throwErrnoIfMinus1Retry "tcSetAttr" - (c_tcgetattr fd p_tios) + throwErrnoIfMinus1Retry "tcSetAttr" + (c_tcgetattr fd p_tios) #ifdef __GLASGOW_HASKELL__ - -- Save a copy of termios, if this is a standard file descriptor. - -- These terminal settings are restored in hs_exit(). - when (fd <= 2) $ do - p <- get_saved_termios fd - when (p == nullPtr) $ do - saved_tios <- mallocBytes sizeof_termios - copyBytes saved_tios p_tios sizeof_termios - set_saved_termios fd saved_tios + -- Save a copy of termios, if this is a standard file descriptor. + -- These terminal settings are restored in hs_exit(). + when (fd <= 2) $ do + p <- get_saved_termios fd + when (p == nullPtr) $ do + saved_tios <- mallocBytes sizeof_termios + copyBytes saved_tios p_tios sizeof_termios + set_saved_termios fd saved_tios #endif - -- tcsetattr() when invoked by a background process causes the process - -- to be sent SIGTTOU regardless of whether the process has TOSTOP set - -- in its terminal flags (try it...). This function provides a - -- wrapper which temporarily blocks SIGTTOU around the call, making it - -- transparent. - allocaBytes sizeof_sigset_t $ \ p_sigset -> do - allocaBytes sizeof_sigset_t $ \ p_old_sigset -> do - c_sigemptyset p_sigset - c_sigaddset p_sigset const_sigttou - c_sigprocmask const_sig_block p_sigset p_old_sigset - r <- fun p_tios -- do the business - throwErrnoIfMinus1Retry_ "tcSetAttr" $ - c_tcsetattr fd const_tcsanow p_tios - c_sigprocmask const_sig_setmask p_old_sigset nullPtr - return r + -- tcsetattr() when invoked by a background process causes the process + -- to be sent SIGTTOU regardless of whether the process has TOSTOP set + -- in its terminal flags (try it...). This function provides a + -- wrapper which temporarily blocks SIGTTOU around the call, making it + -- transparent. + allocaBytes sizeof_sigset_t $ \ p_sigset -> do + allocaBytes sizeof_sigset_t $ \ p_old_sigset -> do + c_sigemptyset p_sigset + c_sigaddset p_sigset const_sigttou + c_sigprocmask const_sig_block p_sigset p_old_sigset + r <- fun p_tios -- do the business + throwErrnoIfMinus1Retry_ "tcSetAttr" $ + c_tcsetattr fd const_tcsanow p_tios + c_sigprocmask const_sig_setmask p_old_sigset nullPtr + return r #ifdef __GLASGOW_HASKELL__ foreign import ccall unsafe "HsBase.h __hscore_get_saved_termios" @@ -290,7 +296,7 @@ foreign import ccall unsafe "consUtils.h get_console_echo__" setNonBlockingFD fd = do flags <- throwErrnoIfMinus1Retry "setNonBlockingFD" - (c_fcntl_read fd const_f_getfl) + (c_fcntl_read fd const_f_getfl) -- An error when setting O_NONBLOCK isn't fatal: on some systems -- there are certain file handles on which this will fail (eg. /dev/null -- on FreeBSD) so we throw away the return code from fcntl_write. @@ -340,8 +346,13 @@ foreign import ccall unsafe "HsBase.h getcwd" foreign import ccall unsafe "HsBase.h isatty" c_isatty :: CInt -> IO CInt +#if defined(mingw32_HOST_OS) || defined(__MINGW32__) +foreign import ccall unsafe "HsBase.h __hscore_lseek" + c_lseek :: CInt -> Int64 -> CInt -> IO Int64 +#else foreign import ccall unsafe "HsBase.h __hscore_lseek" c_lseek :: CInt -> COff -> CInt -> IO COff +#endif foreign import ccall unsafe "HsBase.h __hscore_lstat" lstat :: CString -> Ptr CStat -> IO CInt @@ -360,7 +371,7 @@ foreign import ccall unsafe "HsBase.h read" foreign import ccall unsafe "dirUtils.h __hscore_renameFile" c_rename :: CString -> CString -> IO CInt - + foreign import ccall unsafe "HsBase.h rewinddir" c_rewinddir :: Ptr CDir -> IO () @@ -427,16 +438,6 @@ foreign import ccall unsafe "HsBase.h utime" foreign import ccall unsafe "HsBase.h waitpid" c_waitpid :: CPid -> Ptr CInt -> CInt -> IO CPid -#else -foreign import ccall unsafe "HsBase.h _setmode" - c__setmode :: CInt -> CInt -> IO CInt - --- /* Set "stdin" to have binary mode: */ --- result = _setmode( _fileno( stdin ), _O_BINARY ); --- if( result == -1 ) --- perror( "Cannot set mode" ); --- else --- printf( "'stdin' successfully changed to binary mode\n" ); #endif -- traversing directories @@ -485,8 +486,14 @@ s_isfifo cm = c_s_isfifo cm /= 0 foreign import ccall unsafe "HsBase.h __hscore_sizeof_stat" sizeof_stat :: Int foreign import ccall unsafe "HsBase.h __hscore_st_mtime" st_mtime :: Ptr CStat -> IO CTime +#ifdef mingw32_HOST_OS +foreign import ccall unsafe "HsBase.h __hscore_st_size" st_size :: Ptr CStat -> IO Int64 +#else foreign import ccall unsafe "HsBase.h __hscore_st_size" st_size :: Ptr CStat -> IO COff +#endif foreign import ccall unsafe "HsBase.h __hscore_st_mode" st_mode :: Ptr CStat -> IO CMode +foreign import ccall unsafe "HsBase.h __hscore_st_dev" st_dev :: Ptr CStat -> IO CDev +foreign import ccall unsafe "HsBase.h __hscore_st_ino" st_ino :: Ptr CStat -> IO CIno foreign import ccall unsafe "HsBase.h __hscore_echo" const_echo :: CInt foreign import ccall unsafe "HsBase.h __hscore_tcsanow" const_tcsanow :: CInt