base-4.19.1.0: System/Posix/Internals.hs
{-# LANGUAGE Trustworthy #-}
{-# LANGUAGE InterruptibleFFI #-}
{-# LANGUAGE CPP, NoImplicitPrelude, CApiFFI #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE UnboxedTuples #-}
{-# LANGUAGE MagicHash #-}
{-# OPTIONS_HADDOCK not-home #-}
-----------------------------------------------------------------------------
-- |
-- Module : System.Posix.Internals
-- Copyright : (c) The University of Glasgow, 1992-2002
-- License : see libraries/base/LICENSE
--
-- Maintainer : cvs-ghc@haskell.org
-- Stability : internal
-- Portability : non-portable (requires POSIX)
--
-- POSIX support layer for the standard libraries.
-- 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)
--
-----------------------------------------------------------------------------
module System.Posix.Internals where
#include <ghcplatform.h>
#include "HsBaseConfig.h"
import System.Posix.Types
import Foreign
import Foreign.C
import Data.Maybe
#if !defined(HTYPE_TCFLAG_T)
import System.IO.Error
#endif
import GHC.Base
import GHC.Num
import GHC.Real
import GHC.IO
import GHC.IO.IOMode
import GHC.IO.Exception
import GHC.IO.Device
#if !defined(mingw32_HOST_OS)
import {-# SOURCE #-} GHC.IO.Encoding (getFileSystemEncoding)
import qualified GHC.Foreign as GHC
import GHC.Ptr
#else
import Data.OldList (elem)
#endif
-- ---------------------------------------------------------------------------
-- Debugging the base package
puts :: String -> IO ()
puts s = withCAStringLen (s ++ "\n") $ \(p, len) -> do
-- In reality should be withCString, but assume ASCII to avoid loop
-- if this is called by GHC.Foreign
_ <- c_write 1 (castPtr p) (fromIntegral len)
return ()
-- ---------------------------------------------------------------------------
-- Types
data {-# CTYPE "struct flock" #-} CFLock
data {-# CTYPE "struct group" #-} CGroup
data {-# CTYPE "struct lconv" #-} CLconv
data {-# CTYPE "struct passwd" #-} CPasswd
data {-# CTYPE "struct sigaction" #-} CSigaction
data {-# CTYPE "sigset_t" #-} CSigset
data {-# CTYPE "struct stat" #-} CStat
data {-# CTYPE "struct termios" #-} CTermios
data {-# CTYPE "struct tm" #-} CTm
data {-# CTYPE "struct tms" #-} CTms
data {-# CTYPE "struct utimbuf" #-} CUtimbuf
data {-# CTYPE "struct utsname" #-} CUtsname
type FD = CInt
-- ---------------------------------------------------------------------------
-- stat()-related stuff
fdFileSize :: FD -> IO Integer
fdFileSize fd =
allocaBytes sizeof_stat $ \ p_stat -> do
throwErrnoIfMinus1Retry_ "fileSize" $
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
return (fromIntegral c_size)
fileType :: FilePath -> IO IODeviceType
fileType file =
allocaBytes sizeof_stat $ \ p_stat ->
withFilePath file $ \p_file -> do
throwErrnoIfMinus1Retry_ "fileType" $
c_stat p_file p_stat
statGetType p_stat
-- NOTE: On Win32 platforms, this will only work with file descriptors
-- referring to file handles. i.e., it'll fail for socket FDs.
fdStat :: FD -> IO (IODeviceType, CDev, CIno)
fdStat fd =
allocaBytes sizeof_stat $ \ p_stat -> do
throwErrnoIfMinus1Retry_ "fdType" $
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 IODeviceType
fdType fd = do (ty,_,_) <- fdStat fd; return ty
statGetType :: Ptr CStat -> IO IODeviceType
statGetType p_stat = do
c_mode <- st_mode p_stat :: IO CMode
case () of
_ | 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
ioe_unknownfiletype :: IOException
ioe_unknownfiletype = IOError Nothing UnsupportedOperation "fdType"
"unknown file type"
Nothing
Nothing
fdGetMode :: FD -> IO IOMode
#if defined(mingw32_HOST_OS) || defined(javascript_HOST_ARCH)
fdGetMode _ = do
-- We don't have a way of finding out which flags are set on FDs
-- on Windows/JS, so make a handle that thinks that anything goes.
let flags = o_RDWR
#else
fdGetMode fd = do
flags <- throwErrnoIfMinus1Retry "fdGetMode"
(c_fcntl_read fd const_f_getfl)
#endif
let
wH = (flags .&. o_WRONLY) /= 0
aH = (flags .&. o_APPEND) /= 0
rwH = (flags .&. o_RDWR) /= 0
mode
| wH && aH = AppendMode
| wH = WriteMode
| rwH = ReadWriteMode
| otherwise = ReadMode
return mode
#if defined(mingw32_HOST_OS)
withFilePath :: FilePath -> (CWString -> IO a) -> IO a
withFilePath fp f = do
checkForInteriorNuls fp
withCWString fp f
newFilePath :: FilePath -> IO CWString
newFilePath fp = do
checkForInteriorNuls fp
newCWString fp
peekFilePath :: CWString -> IO FilePath
peekFilePath = peekCWString
-- | Check a 'FilePath' for internal NUL codepoints as these are
-- disallowed in Windows filepaths. See #13660.
checkForInteriorNuls :: FilePath -> IO ()
checkForInteriorNuls fp = when ('\0' `elem` fp) (throwInternalNulError fp)
#else
withFilePath :: FilePath -> (CString -> IO a) -> IO a
newFilePath :: FilePath -> IO CString
peekFilePath :: CString -> IO FilePath
peekFilePathLen :: CStringLen -> IO FilePath
withFilePath fp f = do
enc <- getFileSystemEncoding
GHC.withCStringLen0 enc fp $ \(str, len) -> do
checkForInteriorNuls fp (str, len)
f str
newFilePath fp = do
enc <- getFileSystemEncoding
(str, len) <- GHC.newCStringLen0 enc fp
checkForInteriorNuls fp (str, len)
return str
peekFilePath fp = getFileSystemEncoding >>= \enc -> GHC.peekCString enc fp
peekFilePathLen fp = getFileSystemEncoding >>= \enc -> GHC.peekCStringLen enc fp
-- | Check an encoded 'FilePath' for internal NUL octets as these are
-- disallowed in POSIX filepaths. See #13660.
checkForInteriorNuls :: FilePath -> CStringLen -> IO ()
checkForInteriorNuls fp (str, len) =
when (len' /= len) (throwInternalNulError fp)
-- N.B. If the string contains internal NUL codeunits then the strlen will
-- indicate a size smaller than that returned by withCStringLen.
where
len' = case str of Ptr ptr -> I# (cstringLength# ptr)
#endif
throwInternalNulError :: FilePath -> IO a
throwInternalNulError fp = ioError err
where
err =
IOError
{ ioe_handle = Nothing
, ioe_type = InvalidArgument
, ioe_location = "checkForInteriorNuls"
, ioe_description = "FilePaths must not contain internal NUL code units."
, ioe_errno = Nothing
, ioe_filename = Just fp
}
-- ---------------------------------------------------------------------------
-- Terminal-related stuff
#if defined(HTYPE_TCFLAG_T)
setEcho :: FD -> Bool -> IO ()
setEcho fd on =
tcSetAttr fd $ \ p_tios -> do
lflag <- c_lflag p_tios :: IO CTcflag
let new_lflag
| on = lflag .|. fromIntegral const_echo
| otherwise = lflag .&. complement (fromIntegral const_echo)
poke_c_lflag p_tios (new_lflag :: CTcflag)
getEcho :: FD -> IO Bool
getEcho fd =
tcSetAttr fd $ \ p_tios -> do
lflag <- c_lflag p_tios :: IO CTcflag
return ((lflag .&. fromIntegral const_echo) /= 0)
setCooked :: FD -> Bool -> IO ()
setCooked fd cooked =
tcSetAttr fd $ \ p_tios -> do
-- turn on/off ICANON
lflag <- c_lflag p_tios :: IO CTcflag
let new_lflag | cooked = lflag .|. (fromIntegral const_icanon)
| otherwise = lflag .&. complement (fromIntegral const_icanon)
poke_c_lflag p_tios (new_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
tcSetAttr :: FD -> (Ptr CTermios -> IO a) -> IO a
tcSetAttr fd fun =
allocaBytes sizeof_termios $ \p_tios -> do
throwErrnoIfMinus1Retry_ "tcSetAttr"
(c_tcgetattr fd p_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
-- 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 ->
allocaBytes sizeof_sigset_t $ \ p_old_sigset -> do
throwErrnoIfMinus1_ "sigemptyset" $
c_sigemptyset p_sigset
throwErrnoIfMinus1_ "sigaddset" $
c_sigaddset p_sigset const_sigttou
throwErrnoIfMinus1_ "sigprocmask" $
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
throwErrnoIfMinus1_ "sigprocmask" $
c_sigprocmask const_sig_setmask p_old_sigset nullPtr
return r
foreign import ccall unsafe "HsBase.h __hscore_get_saved_termios"
get_saved_termios :: CInt -> IO (Ptr CTermios)
foreign import ccall unsafe "HsBase.h __hscore_set_saved_termios"
set_saved_termios :: CInt -> (Ptr CTermios) -> IO ()
#elif defined(mingw32_HOST_OS)
-- 'raw' mode for Win32 means turn off 'line input' (=> buffering and
-- character translation for the console.) The Win32 API for doing
-- this is GetConsoleMode(), which also requires echoing to be disabled
-- when turning off 'line input' processing. Notice that turning off
-- 'line input' implies enter/return is reported as '\r' (and it won't
-- report that character until another character is input..odd.) This
-- latter feature doesn't sit too well with IO actions like IO.hGetLine..
-- consider yourself warned.
setCooked :: FD -> Bool -> IO ()
setCooked fd cooked = do
x <- set_console_buffering fd (if cooked then 1 else 0)
if (x /= 0)
then ioError (ioe_unk_error "setCooked" "failed to set buffering")
else return ()
ioe_unk_error :: String -> String -> IOException
ioe_unk_error loc msg
= ioeSetErrorString (mkIOError OtherError loc Nothing Nothing) msg
-- Note: echoing goes hand in hand with enabling 'line input' / raw-ness
-- for Win32 consoles, hence setEcho ends up being the inverse of setCooked.
setEcho :: FD -> Bool -> IO ()
setEcho fd on = do
x <- set_console_echo fd (if on then 1 else 0)
if (x /= 0)
then ioError (ioe_unk_error "setEcho" "failed to set echoing")
else return ()
getEcho :: FD -> IO Bool
getEcho fd = do
r <- get_console_echo fd
if (r == (-1))
then ioError (ioe_unk_error "getEcho" "failed to get echoing")
else return (r == 1)
foreign import ccall unsafe "consUtils.h set_console_buffering__"
set_console_buffering :: CInt -> CInt -> IO CInt
foreign import ccall unsafe "consUtils.h set_console_echo__"
set_console_echo :: CInt -> CInt -> IO CInt
foreign import ccall unsafe "consUtils.h get_console_echo__"
get_console_echo :: CInt -> IO CInt
foreign import ccall unsafe "consUtils.h is_console__"
is_console :: CInt -> IO CInt
#else
setCooked :: FD -> Bool -> IO ()
setCooked _ _ = errorWithoutStackTrace "setCooked"
setEcho :: FD -> Bool -> IO ()
setEcho _ _ = errorWithoutStackTrace "setEcho"
getEcho :: FD -> IO Bool
getEcho _ = errorWithoutStackTrace "getEcho"
#endif
-- ---------------------------------------------------------------------------
-- Turning on non-blocking for a file descriptor
setNonBlockingFD :: FD -> Bool -> IO ()
#if !defined(mingw32_HOST_OS)
setNonBlockingFD fd set = do
flags <- throwErrnoIfMinus1Retry "setNonBlockingFD"
(c_fcntl_read fd const_f_getfl)
let flags' | set = flags .|. o_NONBLOCK
| otherwise = flags .&. complement o_NONBLOCK
when (flags /= flags') $ 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 fd const_f_setfl (fromIntegral flags')
return ()
#else
-- bogus defns for win32
setNonBlockingFD _ _ = return ()
#endif
-- -----------------------------------------------------------------------------
-- Set close-on-exec for a file descriptor
#if !defined(mingw32_HOST_OS)
setCloseOnExec :: FD -> IO ()
setCloseOnExec fd =
throwErrnoIfMinus1_ "setCloseOnExec" $
c_fcntl_write fd const_f_setfd const_fd_cloexec
#endif
-- -----------------------------------------------------------------------------
-- foreign imports
#if !defined(mingw32_HOST_OS)
type CFilePath = CString
#else
type CFilePath = CWString
#endif
-- | The same as 'c_safe_open', but an /interruptible operation/
-- as described in "Control.Exception"—it respects `uninterruptibleMask`
-- but not `mask`.
--
-- We want to be able to interrupt an openFile call if
-- it's expensive (NFS, FUSE, etc.), and we especially
-- need to be able to interrupt a blocking open call.
-- See #17912.
--
-- @since 4.16.0.0
c_interruptible_open :: CFilePath -> CInt -> CMode -> IO CInt
c_interruptible_open filepath oflags mode =
getMaskingState >>= \case
-- If we're in an uninterruptible mask, there's basically
-- no point in using an interruptible FFI call. The open system call
-- will be interrupted, but the exception won't be delivered
-- unless the caller manually futzes with the masking state. So
-- then the caller (assuming they're following the usual conventions)
-- will retry the call (in response to EINTR), and we've just
-- wasted everyone's time.
MaskedUninterruptible -> c_safe_open_ filepath oflags mode
_ -> do
open_res <- c_interruptible_open_ filepath oflags mode
-- c_interruptible_open_ is an interruptible foreign call.
-- If the call is interrupted by an exception handler
-- before the system call has returned (so the file is
-- not yet open), we want to deliver the exception.
-- In point of fact, we deliver any pending exception
-- here regardless of the *reason* the system call
-- fails.
when (open_res == -1) $
if hostIsThreaded
then
-- Control.Exception.allowInterrupt, inlined to avoid
-- messing with any Haddock links.
interruptible (pure ())
else
-- Try to make this work somewhat better on the non-threaded
-- RTS. See #8684. This inlines the definition of `yield`; module
-- dependencies look pretty hairy here and I don't want to make
-- things worse for one little wrapper.
interruptible (IO $ \s -> (# yield# s, () #))
pure open_res
c_safe_open :: CFilePath -> CInt -> CMode -> IO CInt
c_safe_open filepath oflags mode =
getMaskingState >>= \case
-- When exceptions are unmasked, we use an interruptible
-- open call. If the system call is successfully
-- interrupted, the situation will be the same as if
-- the exception had arrived before this function was
-- called.
Unmasked -> c_interruptible_open_ filepath oflags mode
_ -> c_safe_open_ filepath oflags mode
-- | Consult the RTS to find whether it is threaded.
--
-- @since 4.16.0.0
hostIsThreaded :: Bool
hostIsThreaded = rtsIsThreaded_ /= 0
#if !defined(javascript_HOST_ARCH)
foreign import ccall unsafe "HsBase.h __hscore_open"
c_open :: CFilePath -> CInt -> CMode -> IO CInt
-- |
--
-- @since 4.16.0.0
foreign import ccall interruptible "HsBase.h __hscore_open"
c_interruptible_open_ :: CFilePath -> CInt -> CMode -> IO CInt
-- |
--
-- @since 4.16.0.0
foreign import ccall unsafe "rts_isThreaded" rtsIsThreaded_ :: Int
foreign import ccall safe "HsBase.h __hscore_open"
c_safe_open_ :: CFilePath -> CInt -> CMode -> IO CInt
foreign import ccall unsafe "HsBase.h __hscore_fstat"
c_fstat :: CInt -> Ptr CStat -> IO CInt
foreign import ccall unsafe "HsBase.h __hscore_lstat"
lstat :: CFilePath -> Ptr CStat -> IO CInt
#endif
#if defined(javascript_HOST_ARCH)
foreign import javascript unsafe "(() => { return rts_isThreaded; })" rtsIsThreaded_ :: Int
foreign import javascript interruptible "h$base_access"
c_access :: CString -> CInt -> IO CInt
foreign import javascript interruptible "h$base_chmod"
c_chmod :: CString -> CMode -> IO CInt
foreign import javascript interruptible "h$base_close"
c_close :: CInt -> IO CInt
foreign import javascript interruptible "h$base_creat"
c_creat :: CString -> CMode -> IO CInt
foreign import javascript interruptible "h$base_dup"
c_dup :: CInt -> IO CInt
foreign import javascript interruptible "h$base_dup2"
c_dup2 :: CInt -> CInt -> IO CInt
foreign import javascript interruptible "h$base_fstat" -- fixme wrong type
c_fstat :: CInt -> Ptr CStat -> IO CInt
foreign import javascript unsafe "h$base_isatty"
c_isatty :: CInt -> IO CInt
foreign import javascript interruptible "h$base_lseek"
c_lseek :: CInt -> COff -> CInt -> IO COff
foreign import javascript interruptible "h$base_lstat"
lstat :: CFilePath -> Ptr CStat -> IO CInt
foreign import javascript interruptible "h$base_open"
c_open :: CFilePath -> CInt -> CMode -> IO CInt
foreign import javascript interruptible "h$base_open"
c_interruptible_open_ :: CFilePath -> CInt -> CMode -> IO CInt
foreign import javascript interruptible "h$base_open"
c_safe_open_ :: CFilePath -> CInt -> CMode -> IO CInt
foreign import javascript interruptible "h$base_read"
c_read :: CInt -> Ptr Word8 -> CSize -> IO CSsize
foreign import javascript interruptible "h$base_read"
c_safe_read :: CInt -> Ptr Word8 -> CSize -> IO CSsize
foreign import javascript interruptible "h$base_stat" -- fixme wrong type
c_stat :: CFilePath -> Ptr CStat -> IO CInt
foreign import javascript unsafe "h$base_umask"
c_umask :: CMode -> IO CMode
foreign import javascript interruptible "h$base_write"
c_write :: CInt -> Ptr Word8 -> CSize -> IO CSsize
foreign import javascript interruptible "h$base_write"
c_safe_write :: CInt -> Ptr Word8 -> CSize -> IO CSsize
foreign import javascript interruptible "h$base_ftruncate" -- fixme COff
c_ftruncate :: CInt -> FileOffset -> IO CInt
foreign import javascript interruptible "h$base_unlink"
c_unlink :: CString -> IO CInt
foreign import javascript unsafe "h$base_getpid"
c_getpid :: IO CPid
-- foreign import ccall unsafe "HsBase.h fork"
-- c_fork :: IO CPid
foreign import javascript interruptible "h$base_link"
c_link :: CString -> CString -> IO CInt
foreign import javascript interruptible "h$base_mkfifo"
c_mkfifo :: CString -> CMode -> IO CInt
foreign import javascript interruptible "h$base_pipe"
c_pipe :: Ptr CInt -> IO CInt
foreign import javascript unsafe "h$base_sigemptyset"
c_sigemptyset :: Ptr CSigset -> IO CInt
foreign import javascript unsafe "h$base_sigaddset"
c_sigaddset :: Ptr CSigset -> CInt -> IO CInt
foreign import javascript unsafe "h$base_sigprocmask"
c_sigprocmask :: CInt -> Ptr CSigset -> Ptr CSigset -> IO CInt
foreign import javascript unsafe "h$base_tcgetattr"
c_tcgetattr :: CInt -> Ptr CTermios -> IO CInt
foreign import javascript unsafe "h$base_tcsetattr"
c_tcsetattr :: CInt -> CInt -> Ptr CTermios -> IO CInt
foreign import javascript interruptible "h$base_utime"
c_utime :: CString -> Ptr CUtimbuf -> IO CInt
foreign import javascript interruptible "h$base_waitpid"
c_waitpid :: CPid -> Ptr CInt -> CInt -> IO CPid
foreign import javascript unsafe "(() => { return h$base_o_rdonly; })" o_RDONLY :: CInt
foreign import javascript unsafe "(() => { return h$base_o_wronly; })" o_WRONLY :: CInt
foreign import javascript unsafe "(() => { return h$base_o_rdwr; })" o_RDWR :: CInt
foreign import javascript unsafe "(() => { return h$base_o_append; })" o_APPEND :: CInt
foreign import javascript unsafe "(() => { return h$base_o_creat; })" o_CREAT :: CInt
foreign import javascript unsafe "(() => { return h$base_o_excl; })" o_EXCL :: CInt
foreign import javascript unsafe "(() => { return h$base_o_trunc; })" o_TRUNC :: CInt
foreign import javascript unsafe "(() => { return h$base_o_noctty; })" o_NOCTTY :: CInt
foreign import javascript unsafe "(() => { return h$base_o_nonblock; })" o_NONBLOCK :: CInt
foreign import javascript unsafe "(() => { return h$base_o_binary; })" o_BINARY :: CInt
foreign import javascript unsafe "h$base_c_s_isreg" c_s_isreg :: CMode -> CInt
foreign import javascript unsafe "h$base_c_s_ischr" c_s_ischr :: CMode -> CInt
foreign import javascript unsafe "h$base_c_s_isblk" c_s_isblk :: CMode -> CInt
foreign import javascript unsafe "h$base_c_s_isdir" c_s_isdir :: CMode -> CInt
foreign import javascript unsafe "h$base_c_s_isfifo" c_s_isfifo :: CMode -> CInt
s_isreg :: CMode -> Bool
s_isreg cm = c_s_isreg cm /= 0
s_ischr :: CMode -> Bool
s_ischr cm = c_s_ischr cm /= 0
s_isblk :: CMode -> Bool
s_isblk cm = c_s_isblk cm /= 0
s_isdir :: CMode -> Bool
s_isdir cm = c_s_isdir cm /= 0
s_isfifo :: CMode -> Bool
s_isfifo cm = c_s_isfifo cm /= 0
foreign import javascript unsafe "h$base_sizeof_stat" sizeof_stat :: Int
foreign import javascript unsafe "h$base_st_mtime" st_mtime :: Ptr CStat -> IO CTime
foreign import javascript unsafe "h$base_st_size" st_size :: Ptr CStat -> IO Int64
foreign import javascript unsafe "h$base_st_mode" st_mode :: Ptr CStat -> IO CMode
foreign import javascript unsafe "h$base_st_dev" st_dev :: Ptr CStat -> IO CDev
foreign import javascript unsafe "h$base_st_ino" st_ino :: Ptr CStat -> IO CIno
foreign import javascript unsafe "(() => { return h$base_echo; })" const_echo :: CInt
foreign import javascript unsafe "(() => { return h$base_tcsanow; })" const_tcsanow :: CInt
foreign import javascript unsafe "(() => { return h$base_icanon; })" const_icanon :: CInt
foreign import javascript unsafe "(() => { return h$base_vmin; })" const_vmin :: CInt
foreign import javascript unsafe "(() => { return h$base_vtime; })" const_vtime :: CInt
foreign import javascript unsafe "(() => { return h$base_sigttou; })" const_sigttou :: CInt
foreign import javascript unsafe "(() => { return h$base_sig_block; })" const_sig_block :: CInt
foreign import javascript unsafe "(() => { return h$base_sig_setmask; })" const_sig_setmask :: CInt
foreign import javascript unsafe "(() => { return h$base_f_getfl; })" const_f_getfl :: CInt
foreign import javascript unsafe "(() => { return h$base_f_setfl; })" const_f_setfl :: CInt
foreign import javascript unsafe "(() => { return h$base_f_setfd; })" const_f_setfd :: CInt
foreign import javascript unsafe "(() => { return h$base_fd_cloexec; })" const_fd_cloexec :: CLong
foreign import javascript unsafe "(() => { return h$base_sizeof_termios; })" sizeof_termios :: Int
foreign import javascript unsafe "(() => { return h$base_sizeof_sigset_t; })" sizeof_sigset_t :: Int
foreign import javascript unsafe "h$base_lflag" c_lflag :: Ptr CTermios -> IO CTcflag
foreign import javascript unsafe "h$base_poke_lflag" poke_c_lflag :: Ptr CTermios -> CTcflag -> IO ()
foreign import javascript unsafe "h$base_ptr_c_cc" ptr_c_cc :: Ptr CTermios -> IO (Ptr Word8)
s_issock :: CMode -> Bool
s_issock cmode = c_s_issock cmode /= 0
foreign import javascript unsafe "h$base_c_s_issock" c_s_issock :: CMode -> CInt
foreign import javascript unsafe "(() => { return h$base_default_buffer_size; })" dEFAULT_BUFFER_SIZE :: Int
foreign import javascript unsafe "(() => { return h$base_SEEK_CUR; })" sEEK_CUR :: CInt
foreign import javascript unsafe "(() => { return h$base_SEEK_SET; })" sEEK_SET :: CInt
foreign import javascript unsafe "(() => { return h$base_SEEK_END; })" sEEK_END :: CInt
-- fixme, unclear if these can be supported, remove?
foreign import javascript unsafe "h$base_c_fcntl_read" c_fcntl_read :: CInt -> CInt -> IO CInt
foreign import javascript unsafe "h$base_c_fcntl_write" c_fcntl_write :: CInt -> CInt -> CLong -> IO CInt
foreign import javascript unsafe "h$base_c_fcntl_lock" c_fcntl_lock :: CInt -> CInt -> Ptr CFLock -> IO CInt
#else
#if defined(mingw32_HOST_OS)
-- See Note [Windows types]
foreign import capi unsafe "HsBase.h _read"
c_read :: CInt -> Ptr Word8 -> CUInt -> IO CInt
-- See Note [Windows types]
foreign import capi safe "HsBase.h _read"
c_safe_read :: CInt -> Ptr Word8 -> CUInt -> IO CInt
foreign import ccall unsafe "HsBase.h _umask"
c_umask :: CMode -> IO CMode
-- See Note [Windows types]
foreign import capi unsafe "HsBase.h _write"
c_write :: CInt -> Ptr Word8 -> CUInt -> IO CInt
-- See Note [Windows types]
foreign import capi safe "HsBase.h _write"
c_safe_write :: CInt -> Ptr Word8 -> CUInt -> IO CInt
foreign import ccall unsafe "HsBase.h _pipe"
c_pipe :: Ptr CInt -> IO CInt
foreign import capi unsafe "HsBase.h _lseeki64"
c_lseek :: CInt -> Int64 -> CInt -> IO Int64
foreign import capi unsafe "HsBase.h _access"
c_access :: CString -> CInt -> IO CInt
#if !defined(HAVE_CHMOD)
c_chmod :: CString -> CMode -> IO CInt
c_chmod _ _ = ioError (ioeSetLocation unsupportedOperation "_chmod")
#else
foreign import ccall unsafe "HsBase.h _chmod"
c_chmod :: CString -> CMode -> IO CInt
#endif
foreign import capi unsafe "HsBase.h _close"
c_close :: CInt -> IO CInt
foreign import capi unsafe "HsBase.h _creat"
c_creat :: CString -> CMode -> IO CInt
#if !defined(HAVE_DUP)
c_dup :: CInt -> IO CInt
c_dup _ = ioError (ioeSetLocation unsupportedOperation "_dup")
c_dup2 :: CInt -> CInt -> IO CInt
c_dup2 _ _ = ioError (ioeSetLocation unsupportedOperation "_dup2")
#else
foreign import ccall unsafe "HsBase.h _dup"
c_dup :: CInt -> IO CInt
foreign import ccall unsafe "HsBase.h _dup2"
c_dup2 :: CInt -> CInt -> IO CInt
#endif
foreign import capi unsafe "HsBase.h _isatty"
c_isatty :: CInt -> IO CInt
foreign import capi unsafe "HsBase.h _unlink"
c_unlink :: CString -> IO CInt
foreign import capi unsafe "HsBase.h _utime"
c_utime :: CString -> Ptr CUtimbuf -> IO CInt
foreign import capi unsafe "HsBase.h _getpid"
c_getpid :: IO CPid
#else
-- We use CAPI as on some OSs (eg. Linux) this is wrapped by a macro
-- which redirects to the 64-bit-off_t versions when large file
-- support is enabled.
-- See Note [Windows types]
foreign import capi unsafe "HsBase.h read"
c_read :: CInt -> Ptr Word8 -> CSize -> IO CSsize
-- See Note [Windows types]
foreign import capi safe "HsBase.h read"
c_safe_read :: CInt -> Ptr Word8 -> CSize -> IO CSsize
foreign import ccall unsafe "HsBase.h umask"
c_umask :: CMode -> IO CMode
-- See Note [Windows types]
foreign import capi unsafe "HsBase.h write"
c_write :: CInt -> Ptr Word8 -> CSize -> IO CSsize
-- See Note [Windows types]
foreign import capi safe "HsBase.h write"
c_safe_write :: CInt -> Ptr Word8 -> CSize -> IO CSsize
#if !defined(HAVE_PIPE)
c_pipe :: Ptr CInt -> IO CInt
c_pipe _ = ioError (ioeSetLocation unsupportedOperation "pipe")
#else
foreign import ccall unsafe "HsBase.h pipe"
c_pipe :: Ptr CInt -> IO CInt
#endif
foreign import capi unsafe "unistd.h lseek"
c_lseek :: CInt -> COff -> CInt -> IO COff
foreign import ccall unsafe "HsBase.h access"
c_access :: CString -> CInt -> IO CInt
#if !defined(HAVE_CHMOD)
c_chmod :: CString -> CMode -> IO CInt
c_chmod _ _ = ioError (ioeSetLocation unsupportedOperation "chmod")
#else
foreign import ccall unsafe "HsBase.h chmod"
c_chmod :: CString -> CMode -> IO CInt
#endif
foreign import ccall unsafe "HsBase.h close"
c_close :: CInt -> IO CInt
foreign import ccall unsafe "HsBase.h creat"
c_creat :: CString -> CMode -> IO CInt
#if !defined(HAVE_DUP)
c_dup :: CInt -> IO CInt
c_dup _ = ioError (ioeSetLocation unsupportedOperation "dup")
c_dup2 :: CInt -> CInt -> IO CInt
c_dup2 _ _ = ioError (ioeSetLocation unsupportedOperation "dup2")
#else
foreign import ccall unsafe "HsBase.h dup"
c_dup :: CInt -> IO CInt
foreign import ccall unsafe "HsBase.h dup2"
c_dup2 :: CInt -> CInt -> IO CInt
#endif
foreign import ccall unsafe "HsBase.h isatty"
c_isatty :: CInt -> IO CInt
foreign import ccall unsafe "HsBase.h unlink"
c_unlink :: CString -> IO CInt
foreign import capi unsafe "HsBase.h utime"
c_utime :: CString -> Ptr CUtimbuf -> IO CInt
#if !defined(HAVE_GETPID)
c_getpid :: IO CPid
c_getpid = pure 1
#else
foreign import ccall unsafe "HsBase.h getpid"
c_getpid :: IO CPid
#endif
#endif
#if !defined(javascript_HOST_ARCH)
foreign import ccall unsafe "HsBase.h __hscore_stat"
c_stat :: CFilePath -> Ptr CStat -> IO CInt
foreign import ccall unsafe "HsBase.h __hscore_ftruncate"
c_ftruncate :: CInt -> COff -> IO CInt
#endif
#if !defined(mingw32_HOST_OS) && !defined(javascript_HOST_ARCH)
foreign import capi unsafe "HsBase.h fcntl"
c_fcntl_read :: CInt -> CInt -> IO CInt
foreign import capi unsafe "HsBase.h fcntl"
c_fcntl_write :: CInt -> CInt -> CLong -> IO CInt
foreign import capi unsafe "HsBase.h fcntl"
c_fcntl_lock :: CInt -> CInt -> Ptr CFLock -> IO CInt
#if !defined(HAVE_FORK)
c_fork :: IO CPid
c_fork = ioError (ioeSetLocation unsupportedOperation "fork")
#else
foreign import ccall unsafe "HsBase.h fork"
c_fork :: IO CPid
#endif
foreign import ccall unsafe "HsBase.h link"
c_link :: CString -> CString -> IO CInt
#if !defined(HAVE_MKFIFO)
c_mkfifo :: CString -> CMode -> IO CInt
c_mkfifo _ _ = ioError (ioeSetLocation unsupportedOperation "mkfifo")
#else
-- capi is required at least on Android
foreign import capi unsafe "HsBase.h mkfifo"
c_mkfifo :: CString -> CMode -> IO CInt
#endif
#if HAVE_SIGNAL_H
foreign import capi unsafe "signal.h sigemptyset"
c_sigemptyset :: Ptr CSigset -> IO CInt
foreign import capi unsafe "signal.h sigaddset"
c_sigaddset :: Ptr CSigset -> CInt -> IO CInt
foreign import capi unsafe "signal.h sigprocmask"
c_sigprocmask :: CInt -> Ptr CSigset -> Ptr CSigset -> IO CInt
#endif
#if !defined(HAVE_TERMIOS_H)
c_tcgetattr :: CInt -> Ptr CTermios -> IO CInt
c_tcgetattr _ _ = ioError (ioeSetLocation unsupportedOperation "tcgetattr")
c_tcsetattr :: CInt -> CInt -> Ptr CTermios -> IO CInt
c_tcsetattr _ _ _ = ioError (ioeSetLocation unsupportedOperation "tcsetattr")
#else
-- capi is required at least on Android
foreign import capi unsafe "HsBase.h tcgetattr"
c_tcgetattr :: CInt -> Ptr CTermios -> IO CInt
-- capi is required at least on Android
foreign import capi unsafe "HsBase.h tcsetattr"
c_tcsetattr :: CInt -> CInt -> Ptr CTermios -> IO CInt
#endif
#if defined(HAVE_GETPID)
foreign import ccall unsafe "HsBase.h waitpid"
c_waitpid :: CPid -> Ptr CInt -> CInt -> IO CPid
#else
c_waitpid :: CPid -> Ptr CInt -> CInt -> IO CPid
c_waitpid _ _ _ = ioError (ioeSetLocation unsupportedOperation "waitpid")
#endif
#endif
#if !defined(javascript_HOST_ARCH)
-- 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
foreign import ccall unsafe "HsBase.h __hscore_o_rdwr" o_RDWR :: CInt
foreign import ccall unsafe "HsBase.h __hscore_o_append" o_APPEND :: CInt
foreign import ccall unsafe "HsBase.h __hscore_o_creat" o_CREAT :: CInt
foreign import ccall unsafe "HsBase.h __hscore_o_excl" o_EXCL :: CInt
foreign import ccall unsafe "HsBase.h __hscore_o_trunc" o_TRUNC :: CInt
-- non-POSIX flags.
foreign import ccall unsafe "HsBase.h __hscore_o_noctty" o_NOCTTY :: CInt
foreign import ccall unsafe "HsBase.h __hscore_o_nonblock" o_NONBLOCK :: CInt
foreign import ccall unsafe "HsBase.h __hscore_o_binary" o_BINARY :: CInt
foreign import capi unsafe "sys/stat.h S_ISREG" c_s_isreg :: CMode -> CInt
foreign import capi unsafe "sys/stat.h S_ISCHR" c_s_ischr :: CMode -> CInt
foreign import capi unsafe "sys/stat.h S_ISBLK" c_s_isblk :: CMode -> CInt
foreign import capi unsafe "sys/stat.h S_ISDIR" c_s_isdir :: CMode -> CInt
foreign import capi unsafe "sys/stat.h S_ISFIFO" c_s_isfifo :: CMode -> CInt
s_isreg :: CMode -> Bool
s_isreg cm = c_s_isreg cm /= 0
s_ischr :: CMode -> Bool
s_ischr cm = c_s_ischr cm /= 0
s_isblk :: CMode -> Bool
s_isblk cm = c_s_isblk cm /= 0
s_isdir :: CMode -> Bool
s_isdir cm = c_s_isdir cm /= 0
s_isfifo :: CMode -> Bool
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
#if defined(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
foreign import ccall unsafe "HsBase.h __hscore_icanon" const_icanon :: CInt
foreign import ccall unsafe "HsBase.h __hscore_vmin" const_vmin :: CInt
foreign import ccall unsafe "HsBase.h __hscore_vtime" const_vtime :: CInt
foreign import ccall unsafe "HsBase.h __hscore_sigttou" const_sigttou :: CInt
foreign import ccall unsafe "HsBase.h __hscore_sig_block" const_sig_block :: CInt
foreign import ccall unsafe "HsBase.h __hscore_sig_setmask" const_sig_setmask :: CInt
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
foreign import ccall unsafe "HsBase.h __hscore_f_setfd" const_f_setfd :: CInt
foreign import ccall unsafe "HsBase.h __hscore_fd_cloexec" const_fd_cloexec :: CLong
#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
foreign import ccall unsafe "HsBase.h __hscore_lflag" c_lflag :: Ptr CTermios -> IO CTcflag
foreign import ccall unsafe "HsBase.h __hscore_poke_lflag" poke_c_lflag :: Ptr CTermios -> CTcflag -> IO ()
foreign import ccall unsafe "HsBase.h __hscore_ptr_c_cc" ptr_c_cc :: Ptr CTermios -> IO (Ptr Word8)
#endif
s_issock :: CMode -> Bool
#if !defined(mingw32_HOST_OS)
s_issock cmode = c_s_issock cmode /= 0
foreign import capi unsafe "sys/stat.h S_ISSOCK" c_s_issock :: CMode -> CInt
#else
s_issock _ = False
#endif
foreign import ccall unsafe "__hscore_bufsiz" dEFAULT_BUFFER_SIZE :: Int
foreign import capi unsafe "stdio.h value SEEK_CUR" sEEK_CUR :: CInt
foreign import capi unsafe "stdio.h value SEEK_SET" sEEK_SET :: CInt
foreign import capi unsafe "stdio.h value SEEK_END" sEEK_END :: CInt
#endif
#endif
{-
Note [Windows types]
~~~~~~~~~~~~~~~~~~~~
Windows' _read and _write have types that differ from POSIX. They take an
unsigned int for length and return a signed int where POSIX uses size_t and
ssize_t. Those are different on x86_64 and equivalent on x86. We import them
with the types in Microsoft's documentation which means that c_read,
c_safe_read, c_write and c_safe_write have different Haskell types depending on
the OS.
-}