-{-# OPTIONS -fno-implicit-prelude -optc-DNON_POSIX_SOURCE #-}
+{-# OPTIONS -fno-implicit-prelude #-}
-- ---------------------------------------------------------------------------
--- $Id: PrelPosix.hsc,v 1.6 2001/06/05 16:21:25 sewardj Exp $
+-- $Id: PrelPosix.hsc,v 1.14 2001/09/26 10:35:41 simonmar Exp $
--
-- POSIX support layer for the standard libraries
--
--- NON_POSIX_SOURCE needed for the following features:
+-- Non-posix compliant in order to support the following features:
-- * S_ISSOCK (no sockets in POSIX)
module PrelPosix where
+-- See above comment for non-Posixness reasons.
+-- #include "PosixSource.h"
+
#include "HsStd.h"
import PrelBase
ioe_unknownfiletype = IOError Nothing UnsupportedOperation "fdType"
"unknown file type" Nothing
-foreign import "s_isreg_wrap" s_isreg :: CMode -> Bool
-#def inline int s_isreg_wrap(m) { return S_ISREG(m); }
+foreign import "s_isreg_PrelPosix_wrap" unsafe s_isreg :: CMode -> Bool
+#def inline int s_isreg_PrelPosix_wrap(m) { return S_ISREG(m); }
-foreign import "s_isdir_wrap" s_isdir :: CMode -> Bool
-#def inline int s_isdir_wrap(m) { return S_ISDIR(m); }
+foreign import "s_isdir_PrelPosix_wrap" unsafe s_isdir :: CMode -> Bool
+#def inline int s_isdir_PrelPosix_wrap(m) { return S_ISDIR(m); }
-foreign import "s_isfifo_wrap" s_isfifo :: CMode -> Bool
-#def inline int s_isfifo_wrap(m) { return S_ISFIFO(m); }
+foreign import "s_isfifo_PrelPosix_wrap" unsafe s_isfifo :: CMode -> Bool
+#def inline int s_isfifo_PrelPosix_wrap(m) { return S_ISFIFO(m); }
#ifndef mingw32_TARGET_OS
-foreign import "s_issock_wrap" s_issock :: CMode -> Bool
-#def inline int s_issock_wrap(m) { return S_ISSOCK(m); }
+foreign import "s_issock_PrelPosix_wrap" unsafe s_issock :: CMode -> Bool
+#def inline int s_issock_PrelPosix_wrap(m) { return S_ISSOCK(m); }
#else
s_issock :: CMode -> Bool
s_issock cmode = False
#endif
+
+-- 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 ()
+
-- ---------------------------------------------------------------------------
-- Terminal-related stuff
setNonBlockingFD fd = do
flags <- throwErrnoIfMinus1Retry "setNonBlockingFD"
(fcntl_read (fromIntegral fd) (#const F_GETFL))
- throwErrnoIfMinus1Retry "setNonBlockingFD"
- (fcntl_write (fromIntegral fd)
- (#const F_SETFL) (flags .|. #const O_NONBLOCK))
+ -- 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.
+ fcntl_write (fromIntegral fd)
+ (#const F_SETFL) (flags .|. #const O_NONBLOCK)
#else
-- bogus defns for win32
foreign import "fork" unsafe
fork :: IO CPid
-foreign import "sigemptyset" unsafe
+foreign import "sigemptyset_PrelPosix_wrap" unsafe
c_sigemptyset :: Ptr CSigset -> IO ()
+#def inline void sigemptyset_PrelPosix_wrap(sigset_t *set) { sigemptyset(set); }
foreign import "sigaddset" unsafe
c_sigaddset :: Ptr CSigset -> CInt -> IO ()
foreign import "tcsetattr" unsafe
c_tcsetattr :: CInt -> CInt -> Ptr Termios -> IO CInt
+foreign import "unlink" unsafe
+ c_unlink :: CString -> IO CInt
+
foreign import "waitpid" unsafe
c_waitpid :: CPid -> Ptr CInt -> CInt -> IO CPid
#endif