X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=System%2FPosix%2FInternals.hs;h=a1ee00b4d7b5fee6642836d8101d6fdfa4d1d50b;hb=b9b6e38a1ebb5f05b382609fe0776d91cdd1090b;hp=575ec66add595d4bae87fc3da835a1d111023aac;hpb=25955bc845f3680632b6230148f1a39d6a5c1e88;p=haskell-directory.git diff --git a/System/Posix/Internals.hs b/System/Posix/Internals.hs index 575ec66..a1ee00b 100644 --- a/System/Posix/Internals.hs +++ b/System/Posix/Internals.hs @@ -1,4 +1,4 @@ -{-# OPTIONS -fno-implicit-prelude #-} +{-# OPTIONS_GHC -fno-implicit-prelude #-} ----------------------------------------------------------------------------- -- | @@ -8,7 +8,7 @@ -- -- Maintainer : cvs-ghc@haskell.org -- Stability : internal --- Portability : non-portable +-- Portability : non-portable (requires POSIX) -- -- POSIX support layer for the standard libraries. -- This library is built on *every* platform, including Win32. @@ -21,7 +21,8 @@ -- #hide module System.Posix.Internals where -#include "config.h" +#include "ghcconfig.h" +#include "HsBaseConfig.h" import Control.Monad import System.Posix.Types @@ -44,7 +45,7 @@ import System.IO #ifdef __HUGS__ import Hugs.Prelude (IOException(..), IOErrorType(..)) -{-# CBITS PrelIOUtils.c #-} +{-# CFILES cbits/PrelIOUtils.c cbits/dirUtils.c cbits/consUtils.c #-} #endif -- --------------------------------------------------------------------------- @@ -84,7 +85,7 @@ fdFileSize fd = c_size <- st_size p_stat :: IO COff return (fromIntegral c_size) -data FDType = Directory | Stream | RegularFile +data FDType = Directory | Stream | RegularFile | RawDevice deriving (Eq) fileType :: FilePath -> IO FDType @@ -111,25 +112,15 @@ statGetType p_stat = do | 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 ioe_unknownfiletype = IOError Nothing UnsupportedOperation "fdType" "unknown file type" Nothing --- It isn't clear whether ftruncate is POSIX or not (I've read several --- manpages and they seem to conflict), so we truncate using open/2. -fileTruncate :: FilePath -> IO () -fileTruncate file = do - let flags = o_WRONLY .|. o_TRUNC - withCString file $ \file_cstr -> do - fd <- fromIntegral `liftM` - throwErrnoIfMinus1Retry "fileTruncate" - (c_open file_cstr (fromIntegral flags) 0o666) - c_close fd - return () - -#ifdef mingw32_TARGET_OS +#if __GLASGOW_HASKELL__ && (defined(mingw32_HOST_OS) || defined(__MINGW32__)) closeFd :: Bool -> CInt -> IO CInt closeFd isStream fd | isStream = c_closesocket fd @@ -141,7 +132,8 @@ foreign import stdcall unsafe "HsBase.h closesocket" fdGetMode :: Int -> IO IOMode fdGetMode fd = do -#ifdef mingw32_TARGET_OS +#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 (fromIntegral fd) (fromIntegral o_WRONLY)) flags <- throwErrnoIfMinus1Retry "fdGetMode" @@ -169,33 +161,26 @@ fdGetMode fd = do fdIsTTY :: Int -> IO Bool fdIsTTY fd = c_isatty (fromIntegral fd) >>= return.toBool -#ifndef mingw32_TARGET_OS +#if defined(HTYPE_TCFLAG_T) setEcho :: Int -> Bool -> IO () setEcho fd on = do - allocaBytes sizeof_termios $ \p_tios -> do - throwErrnoIfMinus1Retry "setEcho" - (c_tcgetattr (fromIntegral fd) p_tios) + 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) poke_c_lflag p_tios (new_c_lflag :: CTcflag) - tcSetAttr fd const_tcsanow p_tios getEcho :: Int -> IO Bool getEcho fd = do - allocaBytes sizeof_termios $ \p_tios -> do - throwErrnoIfMinus1Retry "setEcho" - (c_tcgetattr (fromIntegral fd) p_tios) + tcSetAttr fd $ \ p_tios -> do c_lflag <- c_lflag p_tios :: IO CTcflag return ((c_lflag .&. fromIntegral const_echo) /= 0) setCooked :: Int -> Bool -> IO () setCooked fd cooked = - allocaBytes sizeof_termios $ \p_tios -> do - throwErrnoIfMinus1Retry "setCooked" - (c_tcgetattr (fromIntegral fd) p_tios) + tcSetAttr fd $ \ p_tios -> do -- turn on/off ICANON c_lflag <- c_lflag p_tios :: IO CTcflag @@ -211,25 +196,46 @@ setCooked fd cooked = poke vmin 1 poke vtime 0 - tcSetAttr fd const_tcsanow p_tios - --- 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. - -tcSetAttr :: FD -> CInt -> Ptr CTermios -> IO () -tcSetAttr fd options p_tios = do - 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 - throwErrnoIfMinus1Retry_ "tcSetAttr" $ - c_tcsetattr (fromIntegral fd) options p_tios - c_sigprocmask const_sig_setmask p_old_sigset nullPtr - return () +tcSetAttr :: FD -> (Ptr CTermios -> IO a) -> IO a +tcSetAttr fd fun = do + allocaBytes sizeof_termios $ \p_tios -> do + throwErrnoIfMinus1Retry "tcSetAttr" + (c_tcgetattr (fromIntegral 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 +#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 (fromIntegral 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" + get_saved_termios :: Int -> IO (Ptr CTermios) + +foreign import ccall unsafe "HsBase.h __hscore_set_saved_termios" + set_saved_termios :: Int -> (Ptr CTermios) -> IO () +#endif #else @@ -245,7 +251,7 @@ setCooked :: Int -> Bool -> IO () setCooked fd cooked = do x <- set_console_buffering (fromIntegral fd) (if cooked then 1 else 0) if (x /= 0) - then ioException (ioe_unk_error "setCooked" "failed to set buffering") + then ioError (ioe_unk_error "setCooked" "failed to set buffering") else return () ioe_unk_error loc msg @@ -257,14 +263,14 @@ setEcho :: Int -> Bool -> IO () setEcho fd on = do x <- set_console_echo (fromIntegral fd) (if on then 1 else 0) if (x /= 0) - then ioException (ioe_unk_error "setEcho" "failed to set echoing") + then ioError (ioe_unk_error "setEcho" "failed to set echoing") else return () getEcho :: Int -> IO Bool getEcho fd = do r <- get_console_echo (fromIntegral fd) if (r == (-1)) - then ioException (ioe_unk_error "getEcho" "failed to get echoing") + then ioError (ioe_unk_error "getEcho" "failed to get echoing") else return (r == 1) foreign import ccall unsafe "consUtils.h set_console_buffering__" @@ -281,7 +287,7 @@ foreign import ccall unsafe "consUtils.h get_console_echo__" -- --------------------------------------------------------------------------- -- Turning on non-blocking for a file descriptor -#ifndef mingw32_TARGET_OS +#if !defined(mingw32_HOST_OS) && !defined(__MINGW32__) setNonBlockingFD fd = do flags <- throwErrnoIfMinus1Retry "setNonBlockingFD" @@ -289,7 +295,9 @@ setNonBlockingFD fd = do -- 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. - c_fcntl_write (fromIntegral fd) const_f_setfl (flags .|. o_NONBLOCK) + unless (testBit flags (fromIntegral o_NONBLOCK)) $ do + c_fcntl_write (fromIntegral fd) const_f_setfl (flags .|. o_NONBLOCK) + return () #else -- bogus defns for win32 @@ -324,7 +332,7 @@ foreign import ccall unsafe "HsBase.h dup" foreign import ccall unsafe "HsBase.h dup2" c_dup2 :: CInt -> CInt -> IO CInt -foreign import ccall unsafe "HsBase.h fstat" +foreign import ccall unsafe "HsBase.h __hscore_fstat" c_fstat :: CInt -> Ptr CStat -> IO CInt foreign import ccall unsafe "HsBase.h getcwd" @@ -333,13 +341,13 @@ foreign import ccall unsafe "HsBase.h getcwd" foreign import ccall unsafe "HsBase.h isatty" c_isatty :: CInt -> IO CInt -foreign import ccall unsafe "HsBase.h lseek" +foreign import ccall unsafe "HsBase.h __hscore_lseek" c_lseek :: CInt -> COff -> CInt -> IO COff foreign import ccall unsafe "HsBase.h __hscore_lstat" lstat :: CString -> Ptr CStat -> IO CInt -foreign import ccall unsafe "HsBase.h open" +foreign import ccall unsafe "HsBase.h __hscore_open" c_open :: CString -> CInt -> CMode -> IO CInt foreign import ccall unsafe "HsBase.h opendir" @@ -351,9 +359,6 @@ foreign import ccall unsafe "HsBase.h __hscore_mkdir" foreign import ccall unsafe "HsBase.h read" c_read :: CInt -> Ptr CChar -> CSize -> IO CSsize -foreign import ccall unsafe "HsBase.h readdir" - c_readdir :: Ptr CDir -> IO (Ptr CDirent) - foreign import ccall unsafe "dirUtils.h __hscore_renameFile" c_rename :: CString -> CString -> IO CInt @@ -363,7 +368,7 @@ foreign import ccall unsafe "HsBase.h rewinddir" foreign import ccall unsafe "HsBase.h rmdir" c_rmdir :: CString -> IO CInt -foreign import ccall unsafe "HsBase.h stat" +foreign import ccall unsafe "HsBase.h __hscore_stat" c_stat :: CString -> Ptr CStat -> IO CInt foreign import ccall unsafe "HsBase.h umask" @@ -372,10 +377,16 @@ foreign import ccall unsafe "HsBase.h umask" foreign import ccall unsafe "HsBase.h write" c_write :: CInt -> Ptr CChar -> CSize -> IO CSsize +foreign import ccall unsafe "HsBase.h __hscore_ftruncate" + c_ftruncate :: CInt -> COff -> IO CInt + foreign import ccall unsafe "HsBase.h unlink" c_unlink :: CString -> IO CInt -#ifndef mingw32_TARGET_OS +foreign import ccall unsafe "HsBase.h getpid" + c_getpid :: IO CPid + +#if !defined(mingw32_HOST_OS) && !defined(__MINGW32__) foreign import ccall unsafe "HsBase.h fcntl" c_fcntl_read :: CInt -> CInt -> IO CInt @@ -388,21 +399,12 @@ foreign import ccall unsafe "HsBase.h fcntl" foreign import ccall unsafe "HsBase.h fork" c_fork :: IO CPid -foreign import ccall unsafe "HsBase.h getpid" - c_getpid :: IO CPid - -foreign import ccall unsafe "HsBase.h fpathconf" - c_fpathconf :: CInt -> CInt -> IO CLong - foreign import ccall unsafe "HsBase.h link" c_link :: CString -> CString -> IO CInt foreign import ccall unsafe "HsBase.h mkfifo" c_mkfifo :: CString -> CMode -> IO CInt -foreign import ccall unsafe "HsBase.h pathconf" - c_pathconf :: CString -> CInt -> IO CLong - foreign import ccall unsafe "HsBase.h pipe" c_pipe :: Ptr CInt -> IO CInt @@ -438,6 +440,19 @@ foreign import ccall unsafe "HsBase.h _setmode" -- printf( "'stdin' successfully changed to binary mode\n" ); #endif +-- traversing directories +foreign import ccall unsafe "dirUtils.h __hscore_readdir" + readdir :: Ptr CDir -> Ptr (Ptr CDirent) -> IO CInt + +foreign import ccall unsafe "HsBase.h __hscore_free_dirent" + freeDirEnt :: Ptr CDirent -> IO () + +foreign import ccall unsafe "HsBase.h __hscore_end_of_dir" + end_of_dir :: CInt + +foreign import ccall unsafe "HsBase.h __hscore_d_name" + d_name :: Ptr CDirent -> IO CString + -- POSIX flags only: foreign import ccall unsafe "HsBase.h __hscore_o_rdonly" o_RDONLY :: CInt foreign import ccall unsafe "HsBase.h __hscore_o_wronly" o_WRONLY :: CInt @@ -474,7 +489,7 @@ foreign import ccall unsafe "HsBase.h __hscore_sig_setmask" const_sig_setmask : foreign import ccall unsafe "HsBase.h __hscore_f_getfl" const_f_getfl :: CInt foreign import ccall unsafe "HsBase.h __hscore_f_setfl" const_f_setfl :: CInt -#ifndef mingw32_TARGET_OS +#if defined(HTYPE_TCFLAG_T) foreign import ccall unsafe "HsBase.h __hscore_sizeof_termios" sizeof_termios :: Int foreign import ccall unsafe "HsBase.h __hscore_sizeof_sigset_t" sizeof_sigset_t :: Int @@ -483,7 +498,7 @@ foreign import ccall unsafe "HsBase.h __hscore_poke_lflag" poke_c_lflag :: Ptr C foreign import ccall unsafe "HsBase.h __hscore_ptr_c_cc" ptr_c_cc :: Ptr CTermios -> IO (Ptr Word8) #endif -#ifndef mingw32_TARGET_OS +#if !defined(mingw32_HOST_OS) && !defined(__MINGW32__) foreign import ccall unsafe "HsBase.h __hscore_s_issock" s_issock :: CMode -> Bool #else s_issock :: CMode -> Bool