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This all started in e968172c which tried
to get rid of redundant import warnings. But we should rather err on
having to tolerate a few warnings on exotic configurations rather than
breaking a build...

This hopefully fixes #36

This makes it more obvious why `unix` depends on `time` in the first
place, i.e. for the sole purpose of reusing the `POSIXTime` type.

CPP conditional code sections have been carefully taken into account
while performing this warning cleanup. Most `OPTIONS_GHC` declarations
could be dropped (now only a lonely `{-# OPTIONS_GHC -fno-cse #-}`
remains in `Posix.Signals`).
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

By avoiding `import Foreign` this accomplishes backward-compatibility
w.r.t. the `unsafePerformIO` relocation w/o resorting to CPP
conditionals.

Moreover, in order to support base<4.7 this commits needs to reintroduce
a harmless backport of `newFilePath`.
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

The changelog file will be shown on Hackage once it's included in the
source tarball.
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

Only language extensions not active when `-XHaskell2010` is enabled are
declared, this way we can drop many redundant
`{-# LANGUAGE ForeignFunctionInterface #-}` occurences. This commit also
removes/replaces some `{-# OPTIONS_GHC -XRecordWildCards #-}` pragmas.
Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

and remove code to support older versions

redneb authored Jun 13, 2012 and pcapriotti committed Jul 17, 2012

Signed-off-by: Paolo Capriotti <p.capriotti@gmail.com>

The new module System.Posix.ByteString provides exactly the same API
as System.Posix, except that:

  - There is a new type: RawFilePath = ByteString

  - All functions mentioning FilePath in the System.Posix API
    use RawFilePath in the System.Posix.ByteString API

  - RawFilePaths are not subject to Unicode locale encoding and
    decoding, unlike FilePaths.  They are the exact bytes passed to and
    returned from the underlying POSIX API.

  - Similarly for functions that deal in environment
    strings (System.Posix.Env): these use untranslated ByteStrings
    in System.Posix.Environment

  - There is a new function

     System.Posix.ByteString.getArgs :: [ByteString]

    returning the raw untranslated arguments as passed to exec() when
    the program was started.

Using CInt makes it much easier to verify that it is right, and we won't
get caught out by possible newtype switches between CInt/Int.

(of the dubiously exported c_access and c_fcntl_write)

Some docs for System.Posix, from Bj?rn Bringert

PATH_MAX fixes from Thomas Schwinge.

c_ftruncate is now in System.Posix.Internals

Add filenames to all errors where it makes sense.  I've added
System.Posix.Error with a new family of error-throwing functions,
throwErrnoPath*.  This seemed to make the most sense: they don't
belong in Foreign.C.Error (C by itself has no notion of paths).

Fixes: [ 954378 ] getFileStatus does not include the file name in IO-Error

fileExist should not throw an exception if the file does not exist.

#ifdef's for the _PC_SYNC_IO, _PC_ASYNC_IO, _PC_FILESIZEBITS,
_PC_SYMLINK_MAX.

These 4 symbols are not universal: FreeBSD and Linux and the only
OS's that appear to have them at the moment.

Implement pathconf()/fpathconf() wrappers.

rename GHC.Posix as System.Posix.Internals

Fill in some more bits in the new Unix library: specifically the
contents of PosixTTY and PosixDB (now System.Posix.Terminal and
System.Posix.User respectively).

We're now about 95% complete w.r.t. the old posix library.  I've
identified the reminaing bits to do in System/Posix.hs.