Split packages into hpath{,-io,-filepath}

2020-01-04 17:52:21 +01:00
parent 4e07fcf5b2
commit 09eea518b8
61 changed files with 349 additions and 229 deletions
--- a/hpath-io/CHANGELOG.md
+++ b/hpath-io/CHANGELOG.md
@@ -0,0 +1,5 @@
+# Revision history for hpath-io
+
+## 0.9.3 -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.
--- a/hpath-io/LICENSE
+++ b/hpath-io/LICENSE
@@ -0,0 +1,30 @@
+Copyright (c) 2020, Julian Ospald
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Julian Ospald nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--- a/hpath-io/README.md
+++ b/hpath-io/README.md
@@ -0,0 +1,26 @@
+# HPath-IO
+
+[![Gitter chat](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/hasufell/hpath?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) [![Hackage version](https://img.shields.io/hackage/v/hpath-io.svg?label=Hackage)](https://hackage.haskell.org/package/hpath-io) [![Build Status](https://api.travis-ci.org/hasufell/hpath.png?branch=master)](http://travis-ci.org/hasufell/hpath) [![Hackage-Deps](https://img.shields.io/hackage-deps/v/hpath-io.svg)](http://packdeps.haskellers.com/feed?needle=hpath-io)
+
+High-level IO operations on files/directories, utilizing type-safe Paths.
+
+## Motivation
+
+The motivation came during development of
+[hsfm](https://github.com/hasufell/hsfm)
+in order to have a proper high-level API of file related operations,
+while utilizing type-safe Paths.
+
+## Goals
+
+* high-level API to file operations like recursive directory copy
+* still allowing sufficient control to interact with the underlying low-level calls
+* unit-testing exceptions (because yes, people may rely on them)
+
+Note: this library was written for __posix__ systems and it will probably not support other systems.
+
+## Differences to 'posix-paths'
+
+* has a custom versions of `openFd` which allows more control over the flags than its unix package counterpart
+* adds a `getDirectoryContents'` version that works on Fd
+
--- a/hpath-io/Setup.hs
+++ b/hpath-io/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
--- a/hpath-io/cbits/dirutils.c
+++ b/hpath-io/cbits/dirutils.c
@@ -0,0 +1,7 @@
+#include "dirutils.h"
+unsigned int
+    __posixdir_d_type(struct dirent* d)
+    {
+      return(d -> d_type);
+    }
+
--- a/hpath-io/cbits/dirutils.h
+++ b/hpath-io/cbits/dirutils.h
@@ -0,0 +1,13 @@
+#ifndef POSIXPATHS_CBITS_DIRUTILS_H
+#define POSIXPATHS_CBITS_DIRUTILS_H
+
+#include <stdlib.h>
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+extern unsigned int
+    __posixdir_d_type(struct dirent* d)
+    ;
+#endif
--- a/hpath-io/hpath-io.cabal
+++ b/hpath-io/hpath-io.cabal
@@ -0,0 +1,100 @@
+name:                hpath-io
+version:             0.9.3
+synopsis:            High-level IO operations on files/directories
+description:         High-level IO operations on files/directories, utilizing type-safe Paths
+-- bug-reports:
+license:             BSD3
+license-file:        LICENSE
+author:              Julian Ospald <hasufell@posteo.de>
+maintainer:          Julian Ospald <hasufell@posteo.de>
+copyright:           Julian Ospald 2016
+category:            Filesystem
+build-type:          Simple
+cabal-version:       1.14
+tested-with:         GHC==7.10.3
+                   , GHC==8.0.2
+                   , GHC==8.2.2
+                   , GHC==8.4.4
+                   , GHC==8.6.5
+                   , GHC==8.8.1
+extra-source-files:  README.md
+                     CHANGELOG.md
+                     cbits/dirutils.h
+
+library
+  if os(windows)
+    build-depends: unbuildable<0
+    buildable: False
+  exposed-modules:   HPath.IO,
+                     HPath.IO.Errors,
+                     System.Posix.Directory.Foreign,
+                     System.Posix.Directory.Traversals,
+                     System.Posix.FD
+  c-sources:         cbits/dirutils.c
+
+  -- other-modules:
+  -- other-extensions:
+  build-depends:     base >= 4.8 && <5
+                   , IfElse
+                   , bytestring >= 0.10.0.0
+                   , hpath
+                   , hpath-filepath
+                   , streamly >= 0.7
+                   , unix >= 2.5
+                   , unix-bytestring
+                   , utf8-string
+  hs-source-dirs:      src
+  default-language:    Haskell2010
+
+test-suite spec
+  if os(windows)
+    build-depends: unbuildable<0
+    buildable: False
+  Type:                 exitcode-stdio-1.0
+  Default-Language:     Haskell2010
+  Hs-Source-Dirs:       test
+  Main-Is:              Main.hs
+  other-modules:
+                        HPath.IO.AppendFileSpec
+                        HPath.IO.CanonicalizePathSpec
+                        HPath.IO.CopyDirRecursiveCollectFailuresSpec
+                        HPath.IO.CopyDirRecursiveOverwriteSpec
+                        HPath.IO.CopyDirRecursiveSpec
+                        HPath.IO.CopyFileOverwriteSpec
+                        HPath.IO.CopyFileSpec
+                        HPath.IO.CreateDirRecursiveSpec
+                        HPath.IO.CreateDirSpec
+                        HPath.IO.CreateRegularFileSpec
+                        HPath.IO.CreateSymlinkSpec
+                        HPath.IO.DeleteDirRecursiveSpec
+                        HPath.IO.DeleteDirSpec
+                        HPath.IO.DeleteFileSpec
+                        HPath.IO.GetDirsFilesSpec
+                        HPath.IO.GetFileTypeSpec
+                        HPath.IO.MoveFileOverwriteSpec
+                        HPath.IO.MoveFileSpec
+                        HPath.IO.ReadFileEOFSpec
+                        HPath.IO.ReadFileSpec
+                        HPath.IO.RecreateSymlinkOverwriteSpec
+                        HPath.IO.RecreateSymlinkSpec
+                        HPath.IO.RenameFileSpec
+                        HPath.IO.ToAbsSpec
+                        HPath.IO.WriteFileSpec
+                        Spec
+                        Utils
+  GHC-Options:          -Wall
+  Build-Depends:        base
+                      , HUnit
+                      , IfElse
+                      , bytestring >= 0.10.0.0
+                      , hpath
+                      , hpath-io
+                      , hspec >= 1.3
+                      , process
+                      , unix
+                      , unix-bytestring
+                      , utf8-string
+
+source-repository head
+  type:     git
+  location: https://github.com/hasufell/hpath
--- a/hpath-io/src/HPath/IO.hs
+++ b/hpath-io/src/HPath/IO.hs
--- a/hpath-io/src/HPath/IO.hs-boot
+++ b/hpath-io/src/HPath/IO.hs-boot
@@ -0,0 +1,8 @@
+module HPath.IO where
+
+
+import HPath
+
+canonicalizePath :: Path b -> IO (Path Abs)
+
+toAbs :: Path b -> IO (Path Abs)
--- a/hpath-io/src/HPath/IO/Errors.hs
+++ b/hpath-io/src/HPath/IO/Errors.hs
@@ -0,0 +1,360 @@
+-- |
+-- Module      :  HPath.IO.Errors
+-- Copyright   :  © 2016 Julian Ospald
+-- License     :  BSD3
+--
+-- Maintainer  :  Julian Ospald <hasufell@posteo.de>
+-- Stability   :  experimental
+-- Portability :  portable
+--
+-- Provides error handling.
+
+{-# LANGUAGE DeriveDataTypeable #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+
+module HPath.IO.Errors
+  (
+  -- * Types
+    HPathIOException(..)
+  , RecursiveFailureHint(..)
+
+  -- * Exception identifiers
+  , isSameFile
+  , isDestinationInSource
+  , isRecursiveFailure
+  , isReadContentsFailed
+  , isCreateDirFailed
+  , isCopyFileFailed
+  , isRecreateSymlinkFailed
+
+  -- * Path based functions
+  , throwFileDoesExist
+  , throwDirDoesExist
+  , throwSameFile
+  , sameFile
+  , throwDestinationInSource
+  , doesFileExist
+  , doesDirectoryExist
+  , isWritable
+  , canOpenDirectory
+
+  -- * Error handling functions
+  , catchErrno
+  , rethrowErrnoAs
+  , handleIOError
+  , bracketeer
+  , reactOnError
+  )
+  where
+
+
+import Control.Applicative
+  (
+    (<$>)
+  )
+import Control.Exception
+import Control.Monad
+  (
+    forM
+  , when
+  )
+import Control.Monad.IfElse
+  (
+    whenM
+  )
+import Data.ByteString
+  (
+    ByteString
+  )
+import Data.ByteString.UTF8
+  (
+    toString
+  )
+import Data.Typeable
+  (
+    Typeable
+  )
+import Foreign.C.Error
+  (
+    getErrno
+  , Errno
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType
+  )
+import HPath
+import HPath.Internal
+  (
+    Path(..)
+  )
+import {-# SOURCE #-} HPath.IO
+  (
+    canonicalizePath
+  , toAbs
+  )
+import System.IO.Error
+  (
+    alreadyExistsErrorType
+  , catchIOError
+  , ioeGetErrorType
+  , mkIOError
+  )
+
+import qualified System.Posix.Directory.ByteString as PFD
+import System.Posix.Files.ByteString
+  (
+    fileAccess
+  , getFileStatus
+  )
+import qualified System.Posix.Files.ByteString as PF
+
+
+-- |Additional generic IO exceptions that the posix functions
+-- do not provide.
+data HPathIOException = SameFile ByteString ByteString
+                      | DestinationInSource ByteString ByteString
+                      | RecursiveFailure [(RecursiveFailureHint, IOException)]
+  deriving (Eq, Show, Typeable)
+
+
+-- |A type for giving failure hints on recursive failure, which allows
+-- to programmatically make choices without examining
+-- the weakly typed I/O error attributes (like `ioeGetFileName`).
+--
+-- The first argument to the data constructor is always the
+-- source and the second the destination.
+data RecursiveFailureHint = ReadContentsFailed    ByteString ByteString
+                          | CreateDirFailed       ByteString ByteString
+                          | CopyFileFailed        ByteString ByteString
+                          | RecreateSymlinkFailed ByteString ByteString
+  deriving (Eq, Show)
+
+
+instance Exception HPathIOException
+
+
+toConstr :: HPathIOException -> String
+toConstr SameFile {}            = "SameFile"
+toConstr DestinationInSource {} = "DestinationInSource"
+toConstr RecursiveFailure {}    = "RecursiveFailure"
+
+
+
+
+
+    -----------------------------
+    --[ Exception identifiers ]--
+    -----------------------------
+
+
+isSameFile, isDestinationInSource, isRecursiveFailure :: HPathIOException -> Bool
+isSameFile ex = toConstr (ex :: HPathIOException) == toConstr (SameFile mempty mempty)
+isDestinationInSource ex = toConstr (ex :: HPathIOException) == (toConstr $ DestinationInSource mempty mempty)
+isRecursiveFailure ex = toConstr (ex :: HPathIOException) == (toConstr $ RecursiveFailure mempty)
+
+
+isReadContentsFailed, isCreateDirFailed, isCopyFileFailed, isRecreateSymlinkFailed ::RecursiveFailureHint -> Bool
+isReadContentsFailed ReadContentsFailed{} = True
+isReadContentsFailed _ = False
+isCreateDirFailed CreateDirFailed{} = True
+isCreateDirFailed _ = False
+isCopyFileFailed CopyFileFailed{} = True
+isCopyFileFailed _ = False
+isRecreateSymlinkFailed RecreateSymlinkFailed{} = True
+isRecreateSymlinkFailed _ = False
+
+
+
+
+
+    ----------------------------
+    --[ Path based functions ]--
+    ----------------------------
+
+
+-- |Throws `AlreadyExists` `IOError` if file exists.
+throwFileDoesExist :: Path b -> IO ()
+throwFileDoesExist fp@(MkPath bs) =
+  whenM (doesFileExist fp)
+        (ioError . mkIOError
+                     alreadyExistsErrorType
+                     "File already exists"
+                     Nothing
+                   $ (Just (toString $ bs))
+        )
+
+
+-- |Throws `AlreadyExists` `IOError` if directory exists.
+throwDirDoesExist :: Path b -> IO ()
+throwDirDoesExist fp@(MkPath bs) =
+  whenM (doesDirectoryExist fp)
+        (ioError . mkIOError
+                     alreadyExistsErrorType
+                     "Directory already exists"
+                     Nothing
+                   $ (Just (toString $ bs))
+        )
+
+
+-- |Uses `isSameFile` and throws `SameFile` if it returns True.
+throwSameFile :: Path b1
+              -> Path b2
+              -> IO ()
+throwSameFile fp1@(MkPath bs1) fp2@(MkPath bs2) =
+  whenM (sameFile fp1 fp2)
+        (throwIO $ SameFile bs1 bs2)
+
+
+-- |Check if the files are the same by examining device and file id.
+-- This follows symbolic links.
+sameFile :: Path b1 -> Path b2 -> IO Bool
+sameFile (MkPath fp1) (MkPath fp2) =
+  handleIOError (\_ -> return False) $ do
+    fs1 <- getFileStatus fp1
+    fs2 <- getFileStatus fp2
+
+    if ((PF.deviceID fs1, PF.fileID fs1) ==
+        (PF.deviceID fs2, PF.fileID fs2))
+      then return True
+      else return False
+
+
+-- TODO: make this more robust when destination does not exist
+-- |Checks whether the destination directory is contained
+-- within the source directory by comparing the device+file ID of the
+-- source directory with all device+file IDs of the parent directories
+-- of the destination.
+throwDestinationInSource :: Path b1 -- ^ source dir
+                         -> Path b2 -- ^ full destination, @dirname dest@
+                                    --   must exist
+                         -> IO ()
+throwDestinationInSource (MkPath sbs) dest@(MkPath dbs) = do
+  destAbs <- toAbs dest
+  dest'   <- (\x -> maybe x (\y -> x </> y) $ basename dest)
+             <$> (canonicalizePath $ dirname destAbs)
+  dids <- forM (getAllParents dest') $ \p -> do
+          fs <- PF.getSymbolicLinkStatus (fromAbs p)
+          return (PF.deviceID fs, PF.fileID fs)
+  sid <- fmap (\x -> (PF.deviceID x, PF.fileID x))
+              $ PF.getFileStatus sbs
+  when (elem sid dids)
+       (throwIO $ DestinationInSource dbs sbs)
+
+
+-- |Checks if the given file exists and is not a directory.
+-- Does not follow symlinks.
+doesFileExist :: Path b -> IO Bool
+doesFileExist (MkPath bs) =
+  handleIOError (\_ -> return False) $ do
+    fs  <- PF.getSymbolicLinkStatus bs
+    return $ not . PF.isDirectory $ fs
+
+
+-- |Checks if the given file exists and is a directory.
+-- Does not follow symlinks.
+doesDirectoryExist :: Path b -> IO Bool
+doesDirectoryExist (MkPath bs) =
+  handleIOError (\_ -> return False) $ do
+    fs  <- PF.getSymbolicLinkStatus bs
+    return $ PF.isDirectory fs
+
+
+-- |Checks whether a file or folder is writable.
+isWritable :: Path b -> IO Bool
+isWritable (MkPath bs) =
+  handleIOError (\_ -> return False) $
+    fileAccess bs False True False
+
+
+-- |Checks whether the directory at the given path exists and can be
+-- opened. This invokes `openDirStream` which follows symlinks.
+canOpenDirectory :: Path b -> IO Bool
+canOpenDirectory (MkPath bs) =
+  handleIOError (\_ -> return False) $ do
+    bracket (PFD.openDirStream bs)
+            PFD.closeDirStream
+            (\_ -> return ())
+    return True
+
+
+
+
+    --------------------------------
+    --[ Error handling functions ]--
+    --------------------------------
+
+
+-- |Carries out an action, then checks if there is an IOException and
+-- a specific errno. If so, then it carries out another action, otherwise
+-- it rethrows the error.
+catchErrno :: [Errno] -- ^ errno to catch
+           -> IO a    -- ^ action to try, which can raise an IOException
+           -> IO a    -- ^ action to carry out in case of an IOException and
+                      --   if errno matches
+           -> IO a
+catchErrno en a1 a2 =
+  catchIOError a1 $ \e -> do
+    errno <- getErrno
+    if errno `elem` en
+      then a2
+      else ioError e
+
+
+-- |Execute the given action and retrow IO exceptions as a new Exception
+-- that have the given errno. If errno does not match the exception is rethrown
+-- as is.
+rethrowErrnoAs :: Exception e
+               => [Errno]       -- ^ errno to catch
+               -> e             -- ^ rethrow as if errno matches
+               -> IO a          -- ^ action to try
+               -> IO a
+rethrowErrnoAs en fmex action = catchErrno en action (throwIO fmex)
+
+
+
+-- |Like `catchIOError`, with arguments swapped.
+handleIOError :: (IOError -> IO a) -> IO a -> IO a
+handleIOError = flip catchIOError
+
+
+-- |Like `bracket`, but allows to have different clean-up
+-- actions depending on whether the in-between computation
+-- has raised an exception or not. 
+bracketeer :: IO a        -- ^ computation to run first
+           -> (a -> IO b) -- ^ computation to run last, when
+                          --   no exception was raised
+           -> (a -> IO b) -- ^ computation to run last,
+                          --   when an exception was raised
+           -> (a -> IO c) -- ^ computation to run in-between
+           -> IO c
+bracketeer before after afterEx thing =
+  mask $ \restore -> do
+    a <- before
+    r <- restore (thing a) `onException` afterEx a
+    _ <- after a
+    return r
+
+
+reactOnError :: IO a
+             -> [(IOErrorType, IO a)]      -- ^ reaction on IO errors
+             -> [(HPathIOException, IO a)] -- ^ reaction on HPathIOException
+             -> IO a
+reactOnError a ios fmios =
+  a `catches` [iohandler, fmiohandler]
+  where
+    iohandler = Handler $
+      \(ex :: IOException) ->
+         foldr (\(t, a') y -> if ioeGetErrorType ex == t
+                                then a'
+                                else y)
+               (throwIO ex)
+               ios
+    fmiohandler = Handler $
+      \(ex :: HPathIOException) ->
+         foldr (\(t, a') y -> if toConstr ex == toConstr t
+                                then a'
+                                else y)
+               (throwIO ex)
+               fmios
+
--- a/hpath-io/src/System/Posix/Directory/Foreign.hsc
+++ b/hpath-io/src/System/Posix/Directory/Foreign.hsc
@@ -0,0 +1,55 @@
+module System.Posix.Directory.Foreign where
+
+import Data.Bits
+import Data.List (foldl')
+import Foreign.C.Types
+
+#include <limits.h>
+#include <stdlib.h>
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+newtype DirType = DirType Int deriving (Eq, Show)
+data Flags = Flags Int | UnsupportedFlag String deriving (Eq, Show)
+
+unFlags :: Flags -> Int
+unFlags (Flags i) = i
+unFlags (UnsupportedFlag name) = error (name ++ " is not supported on this platform")
+
+-- |Returns @True@ if posix-paths was compiled with support for the provided
+-- flag. (As of this writing, the only flag for which this check may be
+-- necessary is 'oCloexec'; all other flags will always yield @True@.)
+isSupported :: Flags -> Bool
+isSupported (Flags _) = True
+isSupported _ = False
+
+-- |@O_CLOEXEC@ is not supported on every POSIX platform. Use
+-- @'isSupported' oCloexec@ to determine if support for @O_CLOEXEC@ was
+-- compiled into your version of posix-paths. (If not, using @oCloexec@ will
+-- throw an exception.)
+oCloexec :: Flags
+#ifdef O_CLOEXEC
+oCloexec = Flags #{const O_CLOEXEC}
+#else
+{-# WARNING oCloexec
+    "This version of posix-paths was compiled without @O_CLOEXEC@ support." #-}
+oCloexec = UnsupportedFlag "O_CLOEXEC"
+#endif
+
+
+
+-- If these enum declarations occur earlier in the file, haddock
+-- gets royally confused about the above doc comments.
+-- Probably http://trac.haskell.org/haddock/ticket/138
+
+#{enum DirType, DirType, DT_BLK, DT_CHR, DT_DIR, DT_FIFO, DT_LNK, DT_REG, DT_SOCK, DT_UNKNOWN}
+
+#{enum Flags, Flags, O_APPEND, O_ASYNC, O_CREAT, O_DIRECTORY, O_EXCL, O_NOCTTY, O_NOFOLLOW, O_NONBLOCK, O_RDONLY, O_WRONLY, O_RDWR, O_SYNC, O_TRUNC}
+
+pathMax :: Int
+pathMax = #{const PATH_MAX}
+
+unionFlags :: [Flags] -> CInt
+unionFlags = fromIntegral . foldl' ((. unFlags) . (.|.)) 0
--- a/hpath-io/src/System/Posix/Directory/Traversals.hs
+++ b/hpath-io/src/System/Posix/Directory/Traversals.hs
@@ -0,0 +1,264 @@
+-- |
+-- Module      :  System.Posix.Directory.Traversals
+-- Copyright   :  © 2016 Julian Ospald
+-- License     :  BSD3
+--
+-- Maintainer  :  Julian Ospald <hasufell@posteo.de>
+-- Stability   :  experimental
+-- Portability :  portable
+--
+-- Traversal and read operations on directories.
+
+
+{-# LANGUAGE CPP #-}
+{-# LANGUAGE ForeignFunctionInterface #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE PackageImports #-}
+{-# LANGUAGE TupleSections #-}
+{-# LANGUAGE ViewPatterns #-}
+
+{-# OPTIONS_GHC -Wall #-}
+
+
+module System.Posix.Directory.Traversals (
+
+  getDirectoryContents
+, getDirectoryContents'
+
+, allDirectoryContents
+, allDirectoryContents'
+, traverseDirectory
+
+-- lower-level stuff
+, readDirEnt
+, packDirStream
+, unpackDirStream
+, fdOpendir
+
+, realpath
+) where
+
+
+#if __GLASGOW_HASKELL__ < 710
+import Control.Applicative ((<$>))
+#endif
+import Control.Monad
+import System.Posix.FilePath ((</>))
+import System.Posix.Directory.Foreign
+
+import qualified System.Posix as Posix
+import System.IO.Error
+import Control.Exception
+import qualified Data.ByteString.Char8 as BS
+import System.Posix.ByteString.FilePath
+import System.Posix.Directory.ByteString as PosixBS
+import System.Posix.Files.ByteString
+
+import System.IO.Unsafe
+import "unix" System.Posix.IO.ByteString (closeFd)
+import Unsafe.Coerce (unsafeCoerce)
+import Foreign.C.Error
+import Foreign.C.String
+import Foreign.C.Types
+import Foreign.Marshal.Alloc (alloca,allocaBytes)
+import Foreign.Ptr
+import Foreign.Storable
+
+
+
+
+----------------------------------------------------------
+
+-- | Get all files from a directory and its subdirectories.
+--
+-- Upon entering a directory, 'allDirectoryContents' will get all entries
+-- strictly.  However the returned list is lazy in that directories will only
+-- be accessed on demand.
+--
+-- Follows symbolic links for the input dir.
+allDirectoryContents :: RawFilePath -> IO [RawFilePath]
+allDirectoryContents topdir = do
+    namesAndTypes <- getDirectoryContents topdir
+    let properNames = filter ((`notElem` [".", ".."]) . snd) namesAndTypes
+    paths <- forM properNames $ \(typ,name) -> unsafeInterleaveIO $ do
+        let path = topdir </> name
+        case () of
+            () | typ == dtDir -> allDirectoryContents path
+               | typ == dtUnknown -> do
+                    isDir <- isDirectory <$> getFileStatus path
+                    if isDir
+                        then allDirectoryContents path
+                        else return [path]
+               | otherwise -> return [path]
+    return (topdir : concat paths)
+
+-- | Get all files from a directory and its subdirectories strictly.
+--
+-- Follows symbolic links for the input dir.
+allDirectoryContents' :: RawFilePath -> IO [RawFilePath]
+allDirectoryContents' = fmap reverse . traverseDirectory (\acc fp -> return (fp:acc)) []
+-- this uses traverseDirectory because it's more efficient than forcing the
+-- lazy version.
+
+-- | Recursively apply the 'action' to the parent directory and all
+-- files/subdirectories.
+--
+-- This function allows for memory-efficient traversals.
+--
+-- Follows symbolic links for the input dir.
+traverseDirectory :: (s -> RawFilePath -> IO s) -> s -> RawFilePath -> IO s
+traverseDirectory act s0 topdir = toploop
+  where
+    toploop = do
+        isDir <- isDirectory <$> getFileStatus topdir
+        s' <- act s0 topdir
+        if isDir then actOnDirContents topdir s' loop
+                 else return s'
+    loop typ path acc = do
+        isDir <- case () of
+            () | typ == dtDir     -> return True
+               | typ == dtUnknown -> isDirectory <$> getFileStatus path
+               | otherwise        -> return False
+        if isDir
+          then act acc path >>= \acc' -> actOnDirContents path acc' loop
+          else act acc path
+
+actOnDirContents :: RawFilePath
+                 -> b
+                 -> (DirType -> RawFilePath -> b -> IO b)
+                 -> IO b
+actOnDirContents pathRelToTop b f =
+  modifyIOError ((`ioeSetFileName` (BS.unpack pathRelToTop)) .
+                 (`ioeSetLocation` "findBSTypRel")) $
+    bracket
+      (openDirStream pathRelToTop)
+      Posix.closeDirStream
+      (\dirp -> loop dirp b)
+ where
+  loop dirp b' = do
+    (typ,e) <- readDirEnt dirp
+    if (e == "")
+      then return b'
+      else
+          if (e == "." || e == "..")
+              then loop dirp b'
+              else f typ (pathRelToTop </> e) b' >>= loop dirp
+
+
+----------------------------------------------------------
+-- dodgy stuff
+
+type CDir = ()
+type CDirent = ()
+
+-- Posix doesn't export DirStream, so to re-use that type we need to use
+-- unsafeCoerce.  It's just a newtype, so this is a legitimate usage.
+-- ugly trick.
+unpackDirStream :: DirStream -> Ptr CDir
+unpackDirStream = unsafeCoerce
+
+packDirStream :: Ptr CDir -> DirStream
+packDirStream = unsafeCoerce
+
+-- the __hscore_* functions are defined in the unix package.  We can import them and let
+-- the linker figure it out.
+foreign import ccall unsafe "__hscore_readdir"
+  c_readdir  :: Ptr CDir -> Ptr (Ptr CDirent) -> IO CInt
+
+foreign import ccall unsafe "__hscore_free_dirent"
+  c_freeDirEnt  :: Ptr CDirent -> IO ()
+
+foreign import ccall unsafe "__hscore_d_name"
+  c_name :: Ptr CDirent -> IO CString
+
+foreign import ccall unsafe "__posixdir_d_type"
+  c_type :: Ptr CDirent -> IO DirType
+
+foreign import ccall "realpath"
+  c_realpath :: CString -> CString -> IO CString
+
+foreign import ccall unsafe "fdopendir"
+  c_fdopendir :: Posix.Fd -> IO (Ptr ())
+
+----------------------------------------------------------
+-- less dodgy but still lower-level
+
+
+readDirEnt :: DirStream -> IO (DirType, RawFilePath)
+readDirEnt (unpackDirStream -> dirp) =
+  alloca $ \ptr_dEnt  -> loop ptr_dEnt
+ where
+  loop ptr_dEnt = do
+    resetErrno
+    r <- c_readdir dirp ptr_dEnt
+    if (r == 0)
+       then do
+         dEnt <- peek ptr_dEnt
+         if (dEnt == nullPtr)
+            then return (dtUnknown,BS.empty)
+            else do
+                 dName <- c_name dEnt >>= peekFilePath
+                 dType <- c_type dEnt
+                 c_freeDirEnt dEnt
+                 return (dType, dName)
+       else do
+         errno <- getErrno
+         if (errno == eINTR)
+            then loop ptr_dEnt
+            else do
+                 let (Errno eo) = errno
+                 if (eo == 0)
+                    then return (dtUnknown,BS.empty)
+                    else throwErrno "readDirEnt"
+
+
+-- |Gets all directory contents (not recursively).
+getDirectoryContents :: RawFilePath -> IO [(DirType, RawFilePath)]
+getDirectoryContents path =
+  modifyIOError ((`ioeSetFileName` (BS.unpack path)) .
+                 (`ioeSetLocation` "System.Posix.Directory.Traversals.getDirectoryContents")) $
+    bracket
+      (PosixBS.openDirStream path)
+      PosixBS.closeDirStream
+      _dirloop
+
+
+-- |Binding to @fdopendir(3)@.
+fdOpendir :: Posix.Fd -> IO DirStream
+fdOpendir fd =
+    packDirStream <$> throwErrnoIfNull "fdOpendir" (c_fdopendir fd)
+
+
+-- |Like `getDirectoryContents` except for a file descriptor.
+--
+-- To avoid complicated error checks, the file descriptor is
+-- __always__ closed, even if `fdOpendir` fails. Usually, this
+-- only happens on successful `fdOpendir` and after the directory
+-- stream is closed. Also see the manpage of @fdopendir(3)@ for
+-- more details.
+getDirectoryContents' :: Posix.Fd -> IO [(DirType, RawFilePath)]
+getDirectoryContents' fd = do
+  dirstream <- fdOpendir fd `catchIOError` \e -> do
+    closeFd fd
+    ioError e
+  -- closeDirStream closes the filedescriptor
+  finally (_dirloop dirstream) (PosixBS.closeDirStream dirstream)
+
+
+_dirloop :: DirStream -> IO [(DirType, RawFilePath)]
+{-# INLINE _dirloop #-}
+_dirloop dirp = do
+   t@(_typ,e) <- readDirEnt dirp
+   if BS.null e then return [] else do
+     es <- _dirloop dirp
+     return (t:es)
+
+
+-- | return the canonicalized absolute pathname
+--
+-- like canonicalizePath, but uses @realpath(3)@
+realpath :: RawFilePath -> IO RawFilePath
+realpath inp =
+    allocaBytes pathMax $ \tmp -> do
+        void $ BS.useAsCString inp $ \cstr -> throwErrnoIfNull "realpath" $ c_realpath cstr tmp
+        BS.packCString tmp
--- a/hpath-io/src/System/Posix/FD.hs
+++ b/hpath-io/src/System/Posix/FD.hs
@@ -0,0 +1,75 @@
+-- |
+-- Module      :  System.Posix.FD
+-- Copyright   :  © 2016 Julian Ospald
+-- License     :  BSD3
+--
+-- Maintainer  :  Julian Ospald <hasufell@posteo.de>
+-- Stability   :  experimental
+-- Portability :  portable
+--
+-- Provides an alternative for `System.Posix.IO.ByteString.openFd`
+-- which gives us more control on what status flags to pass to the
+-- low-level @open(2)@ call, in contrast to the unix package.
+
+
+{-# LANGUAGE ForeignFunctionInterface #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE TupleSections #-}
+
+{-# OPTIONS_GHC -Wall #-}
+
+
+module System.Posix.FD (
+    openFd
+) where
+
+
+import Foreign.C.String
+import Foreign.C.Types
+import System.Posix.Directory.Foreign
+import qualified System.Posix as Posix
+import System.Posix.ByteString.FilePath
+
+
+foreign import ccall unsafe "open"
+   c_open :: CString -> CInt -> Posix.CMode -> IO CInt
+
+
+open_  :: CString
+       -> Posix.OpenMode
+       -> [Flags]
+       -> Maybe Posix.FileMode
+       -> IO Posix.Fd
+open_ str how optional_flags maybe_mode = do
+    fd <- c_open str all_flags mode_w
+    return (Posix.Fd fd)
+  where
+    all_flags  = unionFlags $ optional_flags ++ [open_mode] ++ creat
+
+
+    (creat, mode_w) = case maybe_mode of
+                        Nothing -> ([],0)
+                        Just x  -> ([oCreat], x)
+
+    open_mode = case how of
+                   Posix.ReadOnly  -> oRdonly
+                   Posix.WriteOnly -> oWronly
+                   Posix.ReadWrite -> oRdwr
+
+
+-- |Open and optionally create this file. See 'System.Posix.Files'
+-- for information on how to use the 'FileMode' type.
+--
+-- Note that passing @Just x@ as the 4th argument triggers the
+-- `oCreat` status flag, which must be set when you pass in `oExcl`
+-- to the status flags. Also see the manpage for @open(2)@.
+openFd :: RawFilePath
+       -> Posix.OpenMode
+       -> [Flags]               -- ^ status flags of @open(2)@
+       -> Maybe Posix.FileMode  -- ^ @Just x@ => creates the file with the given modes, Nothing => the file must exist.
+       -> IO Posix.Fd
+openFd name how optional_flags maybe_mode =
+   withFilePath name $ \str ->
+     throwErrnoPathIfMinus1Retry "openFd" name $
+       open_ str how optional_flags maybe_mode
+
--- a/hpath-io/test/HPath/IO/AppendFileSpec.hs
+++ b/hpath-io/test/HPath/IO/AppendFileSpec.hs
@@ -0,0 +1,108 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+
+module HPath.IO.AppendFileSpec where
+
+
+import Test.Hspec
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "AppendFileSpec"
+  createTmpDir
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "fileWithContent"
+  createRegularFile' "fileWithoutContent"
+  createSymlink' "inputFileSymL" "fileWithContent"
+  createDir' "alreadyExistsD"
+  createRegularFile' "noPerms"
+  noPerms "noPerms"
+  createDir' "noPermsD"
+  createRegularFile' "noPermsD/inputFile"
+  noPerms "noPermsD"
+  writeFile' "fileWithContent" "BLKASL"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  deleteFile' "fileWithContent"
+  deleteFile' "fileWithoutContent"
+  deleteFile' "inputFileSymL"
+  deleteDir' "alreadyExistsD"
+  normalFilePerms "noPerms"
+  deleteFile' "noPerms"
+  normalDirPerms "noPermsD"
+  deleteFile' "noPermsD/inputFile"
+  deleteDir' "noPermsD"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.appendFile" $ do
+
+    -- successes --
+    it "appendFile file with content, everything clear" $ do
+      appendFile' "fileWithContent" "blahfaselllll"
+      out <- readFile' "fileWithContent"
+      out `shouldBe` "BLKASLblahfaselllll"
+
+    it "appendFile file with content, everything clear" $ do
+      appendFile' "fileWithContent" "gagagaga"
+      out <- readFile' "fileWithContent"
+      out `shouldBe` "BLKASLblahfaselllllgagagaga"
+
+    it "appendFile file with content, everything clear" $ do
+      appendFile' "fileWithContent" ""
+      out <- readFile' "fileWithContent"
+      out `shouldBe` "BLKASLblahfaselllllgagagaga"
+
+    it "appendFile file without content, everything clear" $ do
+      appendFile' "fileWithoutContent" "blahfaselllll"
+      out <- readFile' "fileWithoutContent"
+      out `shouldBe` "blahfaselllll"
+
+    it "appendFile, everything clear" $ do
+      appendFile' "fileWithoutContent" "gagagaga"
+      out <- readFile' "fileWithoutContent"
+      out `shouldBe` "blahfaselllllgagagaga"
+
+    it "appendFile symlink, everything clear" $ do
+      appendFile' "inputFileSymL" "blahfaselllll"
+      out <- readFile' "inputFileSymL"
+      out `shouldBe` "BLKASLblahfaselllllgagagagablahfaselllll"
+
+    it "appendFile symlink, everything clear" $ do
+      appendFile' "inputFileSymL" "gagagaga"
+      out <- readFile' "inputFileSymL"
+      out `shouldBe` "BLKASLblahfaselllllgagagagablahfaselllllgagagaga"
+
+
+    -- posix failures --
+    it "appendFile to dir, inappropriate type" $ do
+      appendFile' "alreadyExistsD" ""
+        `shouldThrow` (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "appendFile, no permissions to file" $ do
+      appendFile' "noPerms" ""
+        `shouldThrow` (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "appendFile, no permissions to file" $ do
+      appendFile' "noPermsD/inputFile" ""
+        `shouldThrow` (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "appendFile, file does not exist" $ do
+      appendFile' "gaga" ""
+        `shouldThrow` (\e -> ioeGetErrorType e == NoSuchThing)
--- a/hpath-io/test/HPath/IO/CanonicalizePathSpec.hs
+++ b/hpath-io/test/HPath/IO/CanonicalizePathSpec.hs
@@ -0,0 +1,78 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.CanonicalizePathSpec where
+
+
+import Test.Hspec
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "CanonicalizePathSpec"
+  createTmpDir
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "file"
+  createDir' "dir"
+  createSymlink' "dirSym" "dir/"
+  createSymlink' "brokenSym" "nothing"
+  createSymlink' "fileSym" "file"
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  deleteFile' "file"
+  deleteDir' "dir"
+  deleteFile' "dirSym"
+  deleteFile' "brokenSym"
+  deleteFile' "fileSym"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.canonicalizePath" $ do
+
+    -- successes --
+    it "canonicalizePath, all fine" $ do
+      path <- withTmpDir "file" return
+      canonicalizePath' "file"
+        `shouldReturn` path
+
+    it "canonicalizePath, all fine" $ do
+      path <- withTmpDir "dir" return
+      canonicalizePath' "dir"
+        `shouldReturn` path
+
+    it "canonicalizePath, all fine" $ do
+      path <- withTmpDir "file" return
+      canonicalizePath' "fileSym"
+        `shouldReturn` path
+
+    it "canonicalizePath, all fine" $ do
+      path <- withTmpDir "dir" return
+      canonicalizePath' "dirSym"
+        `shouldReturn` path
+
+
+    -- posix failures --
+    it "canonicalizePath, broken symlink" $
+      canonicalizePath' "brokenSym"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "canonicalizePath, file does not exist" $
+      canonicalizePath' "nothingBlah"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
--- a/hpath-io/test/HPath/IO/CopyDirRecursiveCollectFailuresSpec.hs
+++ b/hpath-io/test/HPath/IO/CopyDirRecursiveCollectFailuresSpec.hs
@@ -0,0 +1,248 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+
+module HPath.IO.CopyDirRecursiveCollectFailuresSpec where
+
+
+import Test.Hspec
+import Data.List (sort)
+import HPath.IO
+import HPath.IO.Errors
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import System.Exit
+import System.Process
+import Utils
+import qualified Data.ByteString as BS
+import Data.ByteString.UTF8 (toString)
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "CopyDirRecursiveCollectFailuresSpec"
+  createTmpDir
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "alreadyExists"
+  createRegularFile' "wrongInput"
+  createSymlink' "wrongInputSymL" "inputDir/"
+  createDir' "alreadyExistsD"
+  createDir' "noPerms"
+  createDir' "noWritePerm"
+
+  createDir' "inputDir"
+  createDir' "inputDir/bar"
+  createDir' "inputDir/foo"
+  createRegularFile' "inputDir/foo/inputFile1"
+  createRegularFile' "inputDir/inputFile2"
+  createRegularFile' "inputDir/bar/inputFile3"
+  writeFile' "inputDir/foo/inputFile1" "SDAADSdsada"
+  writeFile' "inputDir/inputFile2" "Blahfaselgagaga"
+  writeFile' "inputDir/bar/inputFile3"
+    "fdfdssdffsd3223sasdasdasdadasasddasdasdasasd4"
+
+  createDir' "inputDir1"
+  createDir' "inputDir1/foo2"
+  createDir' "inputDir1/foo2/foo3"
+  createDir' "inputDir1/foo2/foo4"
+  createRegularFile' "inputDir1/foo2/inputFile1"
+  createRegularFile' "inputDir1/foo2/inputFile2"
+  createRegularFile' "inputDir1/foo2/inputFile3"
+  createRegularFile' "inputDir1/foo2/foo4/inputFile4"
+  createRegularFile' "inputDir1/foo2/foo4/inputFile6"
+  createRegularFile' "inputDir1/foo2/foo3/inputFile5"
+  noPerms "inputDir1/foo2/foo3"
+
+  createDir' "outputDir1"
+  createDir' "outputDir1/foo2"
+  createDir' "outputDir1/foo2/foo4"
+  createDir' "outputDir1/foo2/foo4/inputFile4"
+  createRegularFile' "outputDir1/foo2/foo4/inputFile6"
+  noPerms "outputDir1/foo2/foo4/inputFile4"
+  noPerms "outputDir1/foo2/foo4"
+
+  noPerms "noPerms"
+  noWritableDirPerms "noWritePerm"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "noWritePerm"
+
+  normalDirPerms "inputDir1/foo2/foo3"
+  deleteFile' "inputDir1/foo2/foo4/inputFile4"
+  deleteFile' "inputDir1/foo2/foo4/inputFile6"
+  deleteFile' "inputDir1/foo2/inputFile1"
+  deleteFile' "inputDir1/foo2/inputFile2"
+  deleteFile' "inputDir1/foo2/inputFile3"
+  deleteFile' "inputDir1/foo2/foo3/inputFile5"
+  deleteDir' "inputDir1/foo2/foo3"
+  deleteDir' "inputDir1/foo2/foo4"
+  deleteDir' "inputDir1/foo2"
+  deleteDir' "inputDir1"
+
+  normalDirPerms "outputDir1/foo2/foo4"
+  normalDirPerms "outputDir1/foo2/foo4/inputFile4"
+  deleteFile' "outputDir1/foo2/foo4/inputFile6"
+  deleteDir' "outputDir1/foo2/foo4/inputFile4"
+  deleteDir' "outputDir1/foo2/foo4"
+  deleteDir' "outputDir1/foo2"
+  deleteDir' "outputDir1"
+
+  deleteFile' "alreadyExists"
+  deleteFile' "wrongInput"
+  deleteFile' "wrongInputSymL"
+  deleteDir' "alreadyExistsD"
+  deleteDir' "noPerms"
+  deleteDir' "noWritePerm"
+  deleteFile' "inputDir/foo/inputFile1"
+  deleteFile' "inputDir/inputFile2"
+  deleteFile' "inputDir/bar/inputFile3"
+  deleteDir' "inputDir/foo"
+  deleteDir' "inputDir/bar"
+  deleteDir' "inputDir"
+
+
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.copyDirRecursive" $ do
+
+    -- successes --
+    it "copyDirRecursive (Strict, CollectFailures), all fine and compare" $ do
+      tmpDir' <- getRawTmpDir
+      copyDirRecursive' "inputDir"
+                        "outputDir"
+                        Strict
+                        CollectFailures
+      (system $ "diff -r --no-dereference "
+                          ++ toString tmpDir' ++ "inputDir" ++ " "
+                          ++ toString tmpDir' ++ "outputDir"
+                          ++ " >/dev/null")
+        `shouldReturn` ExitSuccess
+      removeDirIfExists "outputDir"
+
+    -- posix failures --
+    it "copyDirRecursive (Strict, CollectFailures), source directory does not exist" $
+      copyDirRecursive' "doesNotExist"
+                        "outputDir"
+                        Strict
+                        CollectFailures
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "copyDirRecursive (Strict, CollectFailures), cannot open source dir" $
+      copyDirRecursive' "noPerms/inputDir"
+                        "foo"
+                        Strict
+                        CollectFailures
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+
+    -- custom failures
+    it "copyDirRecursive (Overwrite, CollectFailures), various failures" $ do
+      copyDirRecursive' "inputDir1/foo2"
+                        "outputDir1/foo2"
+                        Overwrite
+                        CollectFailures
+        `shouldThrow`
+        (\(RecursiveFailure ex@[_, _]) ->
+          any (\(h, e) -> ioeGetErrorType e == InappropriateType
+                          && isCopyFileFailed h) ex &&
+          any (\(h, e) -> ioeGetErrorType e == PermissionDenied
+                          && isReadContentsFailed h) ex)
+      normalDirPerms "outputDir1/foo2/foo4"
+      normalDirPerms "outputDir1/foo2/foo4/inputFile4"
+      c <- allDirectoryContents' "outputDir1"
+      tmpDir' <- getRawTmpDir
+      let shouldC = (fmap (\x -> tmpDir' `BS.append` x)
+                          ["outputDir1"
+                          ,"outputDir1/foo2"
+                          ,"outputDir1/foo2/inputFile1"
+                          ,"outputDir1/foo2/inputFile2"
+                          ,"outputDir1/foo2/inputFile3"
+                          ,"outputDir1/foo2/foo4"
+                          ,"outputDir1/foo2/foo4/inputFile6"
+                          ,"outputDir1/foo2/foo4/inputFile4"])
+      deleteFile' "outputDir1/foo2/inputFile1"
+      deleteFile' "outputDir1/foo2/inputFile2"
+      deleteFile' "outputDir1/foo2/inputFile3"
+      sort c `shouldBe` sort shouldC
+
+
+    it "copyDirRecursive (Strict, CollectFailures), no write permission on output dir" $
+      copyDirRecursive' "inputDir"
+                        "noWritePerm/foo"
+                        Strict
+                        CollectFailures
+        `shouldThrow`
+        (\(RecursiveFailure [(CreateDirFailed{}, e)]) -> ioeGetErrorType e == PermissionDenied)
+
+    it "copyDirRecursive (Strict, CollectFailures), cannot open output dir" $
+      copyDirRecursive' "inputDir"
+                        "noPerms/foo"
+                        Strict
+                        CollectFailures
+        `shouldThrow`
+        isRecursiveFailure
+
+    it "copyDirRecursive (Strict, CollectFailures), destination dir already exists" $
+      copyDirRecursive' "inputDir"
+                        "alreadyExistsD"
+                        Strict
+                        CollectFailures
+        `shouldThrow`
+        (\(RecursiveFailure [(CreateDirFailed{}, e)]) -> ioeGetErrorType e == AlreadyExists)
+
+    it "copyDirRecursive (Strict, CollectFailures), destination already exists and is a file" $
+      copyDirRecursive' "inputDir"
+                        "alreadyExists"
+                        Strict
+                        CollectFailures
+        `shouldThrow`
+        isRecursiveFailure
+
+    it "copyDirRecursive (Strict, CollectFailures), wrong input (regular file)" $
+      copyDirRecursive' "wrongInput"
+                        "outputDir"
+                        Strict
+                        CollectFailures
+        `shouldThrow`
+        (\(RecursiveFailure [(ReadContentsFailed{}, e)]) -> ioeGetErrorType e == InappropriateType)
+
+    it "copyDirRecursive (Strict, CollectFailures), wrong input (symlink to directory)" $
+      copyDirRecursive' "wrongInputSymL"
+                        "outputDir"
+                        Strict
+                        CollectFailures
+        `shouldThrow`
+        (\(RecursiveFailure [(ReadContentsFailed{}, e)]) -> ioeGetErrorType e == InvalidArgument)
+
+    it "copyDirRecursive (Strict, CollectFailures), destination in source" $
+      copyDirRecursive' "inputDir"
+                        "inputDir/foo"
+                        Strict
+                        CollectFailures
+        `shouldThrow`
+        isDestinationInSource
+
+    it "copyDirRecursive (Strict, CollectFailures), destination and source same directory" $
+      copyDirRecursive' "inputDir"
+                        "inputDir"
+                        Strict
+                        CollectFailures
+        `shouldThrow`
+        isSameFile
+
+
--- a/hpath-io/test/HPath/IO/CopyDirRecursiveOverwriteSpec.hs
+++ b/hpath-io/test/HPath/IO/CopyDirRecursiveOverwriteSpec.hs
@@ -0,0 +1,205 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+
+module HPath.IO.CopyDirRecursiveOverwriteSpec where
+
+
+import Test.Hspec
+import HPath.IO
+import HPath.IO.Errors
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import System.Exit
+import System.Process
+import Utils
+import Data.ByteString.UTF8 (toString)
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "CopyDirRecursiveOverwriteSpec"
+  createTmpDir
+
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "alreadyExists"
+  createRegularFile' "wrongInput"
+  createSymlink' "wrongInputSymL" "inputDir/"
+  createDir' "noPerms"
+  createDir' "noWritePerm"
+
+  createDir' "inputDir"
+  createDir' "inputDir/bar"
+  createDir' "inputDir/foo"
+  createRegularFile' "inputDir/foo/inputFile1"
+  createRegularFile' "inputDir/inputFile2"
+  createRegularFile' "inputDir/bar/inputFile3"
+  writeFile' "inputDir/foo/inputFile1" "SDAADSdsada"
+  writeFile' "inputDir/inputFile2" "Blahfaselgagaga"
+  writeFile' "inputDir/bar/inputFile3"
+    "fdfdssdffsd3223sasdasdasdadasasddasdasdasasd4"
+
+  createDir' "alreadyExistsD"
+  createDir' "alreadyExistsD/bar"
+  createDir' "alreadyExistsD/foo"
+  createRegularFile' "alreadyExistsD/foo/inputFile1"
+  createRegularFile' "alreadyExistsD/inputFile2"
+  createRegularFile' "alreadyExistsD/bar/inputFile3"
+  writeFile' "alreadyExistsD/foo/inputFile1" "DAAsada"
+  writeFile' "alreadyExistsD/inputFile2" "ahfaagaga"
+  writeFile' "alreadyExistsD/bar/inputFile3"
+    "f3223sasdasdaasdasdasasd4"
+
+  noPerms "noPerms"
+  noWritableDirPerms "noWritePerm"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "noWritePerm"
+  deleteFile' "alreadyExists"
+  deleteFile' "wrongInput"
+  deleteFile' "wrongInputSymL"
+  deleteDir' "noPerms"
+  deleteDir' "noWritePerm"
+  deleteFile' "inputDir/foo/inputFile1"
+  deleteFile' "inputDir/inputFile2"
+  deleteFile' "inputDir/bar/inputFile3"
+  deleteDir' "inputDir/foo"
+  deleteDir' "inputDir/bar"
+  deleteDir' "inputDir"
+  deleteFile' "alreadyExistsD/foo/inputFile1"
+  deleteFile' "alreadyExistsD/inputFile2"
+  deleteFile' "alreadyExistsD/bar/inputFile3"
+  deleteDir' "alreadyExistsD/foo"
+  deleteDir' "alreadyExistsD/bar"
+  deleteDir' "alreadyExistsD"
+
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.copyDirRecursive" $ do
+
+    -- successes --
+    it "copyDirRecursive (Overwrite, FailEarly), all fine" $ do
+      copyDirRecursive' "inputDir"
+                        "outputDir"
+                        Overwrite
+                        FailEarly
+      removeDirIfExists "outputDir"
+
+    it "copyDirRecursive (Overwrite, FailEarly), all fine and compare" $ do
+      tmpDir' <- getRawTmpDir
+      copyDirRecursive' "inputDir"
+                        "outputDir"
+                        Overwrite
+                        FailEarly
+      (system $ "diff -r --no-dereference "
+                          ++ toString tmpDir' ++ "inputDir" ++ " "
+                          ++ toString tmpDir' ++ "outputDir"
+                          ++ " >/dev/null")
+        `shouldReturn` ExitSuccess
+      removeDirIfExists "outputDir"
+
+    it "copyDirRecursive (Overwrite, FailEarly), destination dir already exists" $ do
+      tmpDir' <- getRawTmpDir
+      (system $ "diff -r --no-dereference "
+                          ++ toString tmpDir' ++ "inputDir" ++ " "
+                          ++ toString tmpDir' ++ "alreadyExistsD"
+                          ++ " >/dev/null")
+        `shouldReturn` (ExitFailure 1)
+      copyDirRecursive' "inputDir"
+                        "alreadyExistsD"
+                        Overwrite
+                        FailEarly
+      (system $ "diff -r --no-dereference "
+                          ++ toString tmpDir' ++ "inputDir" ++ " "
+                          ++ toString tmpDir' ++ "alreadyExistsD"
+                          ++ " >/dev/null")
+        `shouldReturn` ExitSuccess
+      removeDirIfExists "outputDir"
+
+
+    -- posix failures --
+    it "copyDirRecursive, source directory does not exist" $
+      copyDirRecursive' "doesNotExist"
+                        "outputDir"
+                        Overwrite
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "copyDirRecursive, no write permission on output dir" $
+      copyDirRecursive' "inputDir"
+                        "noWritePerm/foo"
+                        Overwrite
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "copyDirRecursive, cannot open output dir" $
+      copyDirRecursive' "inputDir"
+                        "noPerms/foo"
+                        Overwrite
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "copyDirRecursive, cannot open source dir" $
+      copyDirRecursive' "noPerms/inputDir"
+                        "foo"
+                        Overwrite
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "copyDirRecursive, destination already exists and is a file" $
+      copyDirRecursive' "inputDir"
+                        "alreadyExists"
+                        Overwrite
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "copyDirRecursive, wrong input (regular file)" $
+      copyDirRecursive' "wrongInput"
+                        "outputDir"
+                        Overwrite
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "copyDirRecursive, wrong input (symlink to directory)" $
+      copyDirRecursive' "wrongInputSymL"
+                        "outputDir"
+                        Overwrite
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InvalidArgument)
+
+    -- custom failures
+    it "copyDirRecursive (Overwrite, FailEarly), destination in source" $
+      copyDirRecursive' "inputDir"
+                        "inputDir/foo"
+                        Overwrite
+                        FailEarly
+        `shouldThrow`
+        isDestinationInSource
+
+    it "copyDirRecursive (Overwrite, FailEarly), destination and source same directory" $
+      copyDirRecursive' "inputDir"
+                        "inputDir"
+                        Overwrite
+                        FailEarly
+        `shouldThrow`
+        isSameFile
--- a/hpath-io/test/HPath/IO/CopyDirRecursiveSpec.hs
+++ b/hpath-io/test/HPath/IO/CopyDirRecursiveSpec.hs
@@ -0,0 +1,181 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+
+module HPath.IO.CopyDirRecursiveSpec where
+
+
+import Test.Hspec
+import HPath.IO
+import HPath.IO.Errors
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import System.Exit
+import System.Process
+import Utils
+import Data.ByteString.UTF8 (toString)
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "CopyDirRecursiveSpec"
+  createTmpDir
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "alreadyExists"
+  createRegularFile' "wrongInput"
+  createSymlink' "wrongInputSymL" "inputDir/"
+  createDir' "alreadyExistsD"
+  createDir' "noPerms"
+  createDir' "noWritePerm"
+
+  createDir' "inputDir"
+  createDir' "inputDir/bar"
+  createDir' "inputDir/foo"
+  createRegularFile' "inputDir/foo/inputFile1"
+  createRegularFile' "inputDir/inputFile2"
+  createRegularFile' "inputDir/bar/inputFile3"
+  writeFile' "inputDir/foo/inputFile1" "SDAADSdsada"
+  writeFile' "inputDir/inputFile2" "Blahfaselgagaga"
+  writeFile' "inputDir/bar/inputFile3"
+    "fdfdssdffsd3223sasdasdasdadasasddasdasdasasd4"
+
+  noPerms "noPerms"
+  noWritableDirPerms "noWritePerm"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "noWritePerm"
+  deleteFile' "alreadyExists"
+  deleteFile' "wrongInput"
+  deleteFile' "wrongInputSymL"
+  deleteDir' "alreadyExistsD"
+  deleteDir' "noPerms"
+  deleteDir' "noWritePerm"
+  deleteFile' "inputDir/foo/inputFile1"
+  deleteFile' "inputDir/inputFile2"
+  deleteFile' "inputDir/bar/inputFile3"
+  deleteDir' "inputDir/foo"
+  deleteDir' "inputDir/bar"
+  deleteDir' "inputDir"
+
+
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.copyDirRecursive" $ do
+
+    -- successes --
+    it "copyDirRecursive (Strict, FailEarly), all fine" $ do
+      copyDirRecursive' "inputDir"
+                        "outputDir"
+                        Strict
+                        FailEarly
+      removeDirIfExists "outputDir"
+
+    it "copyDirRecursive (Strict, FailEarly), all fine and compare" $ do
+      tmpDir' <- getRawTmpDir
+      copyDirRecursive' "inputDir"
+                        "outputDir"
+                        Strict
+                        FailEarly
+      (system $ "diff -r --no-dereference "
+                          ++ toString tmpDir' ++ "inputDir" ++ " "
+                          ++ toString tmpDir' ++ "outputDir"
+                          ++ " >/dev/null")
+        `shouldReturn` ExitSuccess
+      removeDirIfExists "outputDir"
+
+    -- posix failures --
+    it "copyDirRecursive (Strict, FailEarly), source directory does not exist" $
+      copyDirRecursive' "doesNotExist"
+                        "outputDir"
+                        Strict
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "copyDirRecursive (Strict, FailEarly), no write permission on output dir" $
+      copyDirRecursive' "inputDir"
+                        "noWritePerm/foo"
+                        Strict
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "copyDirRecursive (Strict, FailEarly), cannot open output dir" $
+      copyDirRecursive' "inputDir"
+                        "noPerms/foo"
+                        Strict
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "copyDirRecursive (Strict, FailEarly), cannot open source dir" $
+      copyDirRecursive' "noPerms/inputDir"
+                        "foo"
+                        Strict
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "copyDirRecursive (Strict, FailEarly), destination dir already exists" $
+      copyDirRecursive' "inputDir"
+                        "alreadyExistsD"
+                        Strict
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
+    it "copyDirRecursive (Strict, FailEarly), destination already exists and is a file" $
+      copyDirRecursive' "inputDir"
+                        "alreadyExists"
+                        Strict
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
+    it "copyDirRecursive (Strict, FailEarly), wrong input (regular file)" $
+      copyDirRecursive' "wrongInput"
+                        "outputDir"
+                        Strict
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "copyDirRecursive (Strict, FailEarly), wrong input (symlink to directory)" $
+      copyDirRecursive' "wrongInputSymL"
+                        "outputDir"
+                        Strict
+                        FailEarly
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InvalidArgument)
+
+    -- custom failures
+    it "copyDirRecursive (Strict, FailEarly), destination in source" $
+      copyDirRecursive' "inputDir"
+                        "inputDir/foo"
+                        Strict
+                        FailEarly
+        `shouldThrow`
+        isDestinationInSource
+
+    it "copyDirRecursive (Strict, FailEarly), destination and source same directory" $
+      copyDirRecursive' "inputDir"
+                        "inputDir"
+                        Strict
+                        FailEarly
+        `shouldThrow`
+        isSameFile
+
+
--- a/hpath-io/test/HPath/IO/CopyFileOverwriteSpec.hs
+++ b/hpath-io/test/HPath/IO/CopyFileOverwriteSpec.hs
@@ -0,0 +1,148 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.CopyFileOverwriteSpec where
+
+
+import Test.Hspec
+import HPath.IO
+import HPath.IO.Errors
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import System.Exit
+import System.Process
+import Utils
+import Data.ByteString.UTF8 (toString)
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "CopyFileOverwriteSpec"
+  createTmpDir
+
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "inputFile"
+  createRegularFile' "alreadyExists"
+  createSymlink' "inputFileSymL" "inputFile"
+  createDir' "alreadyExistsD"
+  createDir' "noPerms"
+  createRegularFile' "noPerms/inputFile"
+  createDir' "outputDirNoWrite"
+  createDir' "wrongInput"
+  noPerms "noPerms"
+  noWritableDirPerms "outputDirNoWrite"
+  writeFile' "inputFile" "Blahfaselgagaga"
+  writeFile' "alreadyExists" "dsaldsalkaklsdlkasksdadasl"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "outputDirNoWrite"
+  deleteFile' "noPerms/inputFile"
+  deleteFile' "inputFile"
+  deleteFile' "alreadyExists"
+  deleteFile' "inputFileSymL"
+  deleteDir' "alreadyExistsD"
+  deleteDir' "noPerms"
+  deleteDir' "outputDirNoWrite"
+  deleteDir' "wrongInput"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.copyFile" $ do
+
+    -- successes --
+    it "copyFile (Overwrite), everything clear" $ do
+      copyFile' "inputFile"
+                "outputFile"
+                Overwrite
+      removeFileIfExists "outputFile"
+
+    it "copyFile (Overwrite), output file already exists, all clear" $ do
+      tmpDir' <- getRawTmpDir
+      copyFile' "alreadyExists" "alreadyExists.bak" Strict
+      copyFile' "inputFile" "alreadyExists" Overwrite
+      (system $ "cmp -s " ++ toString tmpDir' ++ "inputFile" ++ " "
+                          ++ toString tmpDir' ++ "alreadyExists")
+        `shouldReturn` ExitSuccess
+      removeFileIfExists "alreadyExists"
+      copyFile' "alreadyExists.bak" "alreadyExists" Strict
+      removeFileIfExists "alreadyExists.bak"
+
+    it "copyFile (Overwrite), and compare" $ do
+      tmpDir' <- getRawTmpDir
+      copyFile' "inputFile"
+                "outputFile"
+                Overwrite
+      (system $ "cmp -s " ++ toString tmpDir' ++ "inputFile" ++ " "
+                          ++ toString tmpDir' ++ "outputFile")
+        `shouldReturn` ExitSuccess
+      removeFileIfExists "outputFile"
+
+
+    -- posix failures --
+    it "copyFile (Overwrite), input file does not exist" $
+      copyFile' "noSuchFile"
+                "outputFile"
+                Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "copyFile (Overwrite), no permission to write to output directory" $
+      copyFile' "inputFile"
+                "outputDirNoWrite/outputFile"
+                Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "copyFile (Overwrite), cannot open output directory" $
+      copyFile' "inputFile"
+                "noPerms/outputFile"
+                Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "copyFile (Overwrite), cannot open source directory" $
+      copyFile' "noPerms/inputFile"
+                "outputFile"
+                Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "copyFile (Overwrite), wrong input type (symlink)" $
+      copyFile' "inputFileSymL"
+                "outputFile"
+                Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InvalidArgument)
+
+    it "copyFile (Overwrite), wrong input type (directory)" $
+      copyFile' "wrongInput"
+                "outputFile"
+                Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "copyFile (Overwrite), output file already exists and is a dir" $
+      copyFile' "inputFile"
+                "alreadyExistsD"
+                Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InappropriateType)
+
+    -- custom failures --
+    it "copyFile (Overwrite), output and input are same file" $
+      copyFile' "inputFile"
+                "inputFile"
+                Overwrite
+        `shouldThrow` isSameFile
--- a/hpath-io/test/HPath/IO/CopyFileSpec.hs
+++ b/hpath-io/test/HPath/IO/CopyFileSpec.hs
@@ -0,0 +1,143 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+
+module HPath.IO.CopyFileSpec where
+
+
+import Test.Hspec
+import HPath.IO
+import HPath.IO.Errors
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import System.Exit
+import System.Process
+import Utils
+import Data.ByteString.UTF8 (toString)
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "CopyFileSpec"
+  createTmpDir
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "inputFile"
+  createRegularFile' "alreadyExists"
+  createSymlink' "inputFileSymL" "inputFile"
+  createDir' "alreadyExistsD"
+  createDir' "noPerms"
+  createRegularFile' "noPerms/inputFile"
+  createDir' "outputDirNoWrite"
+  createDir' "wrongInput"
+  noPerms "noPerms"
+  noWritableDirPerms "outputDirNoWrite"
+  writeFile' "inputFile" "Blahfaselgagaga"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "outputDirNoWrite"
+  deleteFile' "noPerms/inputFile"
+  deleteFile' "inputFile"
+  deleteFile' "alreadyExists"
+  deleteFile' "inputFileSymL"
+  deleteDir' "alreadyExistsD"
+  deleteDir' "noPerms"
+  deleteDir' "outputDirNoWrite"
+  deleteDir' "wrongInput"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.copyFile" $ do
+
+    -- successes --
+    it "copyFile (Strict), everything clear" $ do
+      copyFile' "inputFile"
+                "outputFile"
+                Strict
+      removeFileIfExists "outputFile"
+
+    it "copyFile (Strict), and compare" $ do
+      tmpDir' <- getRawTmpDir
+      copyFile' "inputFile"
+                "outputFile"
+                Strict
+      (system $ "cmp -s " ++ toString tmpDir' ++ "inputFile" ++ " "
+                          ++ toString tmpDir' ++ "outputFile")
+        `shouldReturn` ExitSuccess
+      removeFileIfExists "outputFile"
+
+    -- posix failures --
+    it "copyFile (Strict), input file does not exist" $
+      copyFile' "noSuchFile"
+                "outputFile"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "copyFile (Strict), no permission to write to output directory" $
+      copyFile' "inputFile"
+                "outputDirNoWrite/outputFile"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "copyFile (Strict), cannot open output directory" $
+      copyFile' "inputFile"
+                "noPerms/outputFile"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "copyFile (Strict), cannot open source directory" $
+      copyFile' "noPerms/inputFile"
+                "outputFile"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "copyFile (Strict), wrong input type (symlink)" $
+      copyFile' "inputFileSymL"
+                "outputFile"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InvalidArgument)
+
+    it "copyFile (Strict), wrong input type (directory)" $
+      copyFile' "wrongInput"
+                "outputFile"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "copyFile (Strict), output file already exists" $
+      copyFile' "inputFile"
+                "alreadyExists"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
+    it "copyFile (Strict), output file already exists and is a dir" $
+      copyFile' "inputFile"
+                "alreadyExistsD"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
+    -- custom failures --
+    it "copyFile (Strict), output and input are same file" $
+      copyFile' "inputFile"
+                "inputFile"
+                Strict
+        `shouldThrow`
+        isSameFile
--- a/hpath-io/test/HPath/IO/CreateDirRecursiveSpec.hs
+++ b/hpath-io/test/HPath/IO/CreateDirRecursiveSpec.hs
@@ -0,0 +1,78 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.CreateDirRecursiveSpec where
+
+
+import Test.Hspec
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "CreateDirRecursiveSpec"
+  createTmpDir
+
+setupFiles :: IO ()
+setupFiles = do
+  createDir' "alreadyExists"
+  createRegularFile' "alreadyExistsF"
+  createDir' "noPerms"
+  createDir' "noWritePerms"
+  noPerms "noPerms"
+  noWritableDirPerms "noWritePerms"
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "noWritePerms"
+  deleteDir' "alreadyExists"
+  deleteDir' "noPerms"
+  deleteDir' "noWritePerms"
+  deleteFile' "alreadyExistsF"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.createDirRecursive" $ do
+
+    -- successes --
+    it "createDirRecursive, all fine" $ do
+      createDirRecursive' "newDir"
+      deleteDir' "newDir"
+
+    it "createDirRecursive, parent directories do not exist" $ do
+      createDirRecursive' "some/thing/dada"
+      deleteDir' "some/thing/dada"
+      deleteDir' "some/thing"
+      deleteDir' "some"
+
+    it "createDirRecursive, destination directory already exists" $
+      createDirRecursive' "alreadyExists"
+
+    -- posix failures --
+    it "createDirRecursive, destination already exists and is a file" $
+      createDirRecursive' "alreadyExistsF"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
+    it "createDirRecursive, can't write to output directory" $
+      createDirRecursive' "noWritePerms/newDir"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "createDirRecursive, can't open output directory" $
+      createDirRecursive' "noPerms/newDir"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+
+
--- a/hpath-io/test/HPath/IO/CreateDirSpec.hs
+++ b/hpath-io/test/HPath/IO/CreateDirSpec.hs
@@ -0,0 +1,72 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.CreateDirSpec where
+
+
+import Test.Hspec
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "CreateDirSpec"
+  createTmpDir
+
+setupFiles :: IO ()
+setupFiles = do
+  createDir' "alreadyExists"
+  createDir' "noPerms"
+  createDir' "noWritePerms"
+  noPerms "noPerms"
+  noWritableDirPerms "noWritePerms"
+
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "noWritePerms"
+  deleteDir' "alreadyExists"
+  deleteDir' "noPerms"
+  deleteDir' "noWritePerms"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.createDir" $ do
+
+    -- successes --
+    it "createDir, all fine" $ do
+      createDir' "newDir"
+      removeDirIfExists "newDir"
+
+    -- posix failures --
+    it "createDir, parent directories do not exist" $
+      createDir' "some/thing/dada"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "createDir, can't write to output directory" $
+      createDir' "noWritePerms/newDir"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "createDir, can't open output directory" $
+      createDir' "noPerms/newDir"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "createDir, destination directory already exists" $
+      createDir' "alreadyExists"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
--- a/hpath-io/test/HPath/IO/CreateRegularFileSpec.hs
+++ b/hpath-io/test/HPath/IO/CreateRegularFileSpec.hs
@@ -0,0 +1,70 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.CreateRegularFileSpec where
+
+
+import Test.Hspec
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "CreateRegularFileSpec"
+  createTmpDir
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "alreadyExists"
+  createDir' "noPerms"
+  createDir' "noWritePerms"
+  noPerms "noPerms"
+  noWritableDirPerms "noWritePerms"
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "noWritePerms"
+  deleteFile' "alreadyExists"
+  deleteDir' "noPerms"
+  deleteDir' "noWritePerms"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.createRegularFile" $ do
+
+    -- successes --
+    it "createRegularFile, all fine" $ do
+      createRegularFile' "newDir"
+      removeFileIfExists "newDir"
+
+    -- posix failures --
+    it "createRegularFile, parent directories do not exist" $
+      createRegularFile' "some/thing/dada"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "createRegularFile, can't write to destination directory" $
+      createRegularFile' "noWritePerms/newDir"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "createRegularFile, can't write to destination directory" $
+      createRegularFile' "noPerms/newDir"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "createRegularFile, destination file already exists" $
+      createRegularFile' "alreadyExists"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
--- a/hpath-io/test/HPath/IO/CreateSymlinkSpec.hs
+++ b/hpath-io/test/HPath/IO/CreateSymlinkSpec.hs
@@ -0,0 +1,71 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.CreateSymlinkSpec where
+
+
+import Test.Hspec
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "CreateSymlinkSpec"
+  createTmpDir
+
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "alreadyExists"
+  createDir' "noPerms"
+  createDir' "noWritePerms"
+  noPerms "noPerms"
+  noWritableDirPerms "noWritePerms"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "noWritePerms"
+  deleteFile' "alreadyExists"
+  deleteDir' "noPerms"
+  deleteDir' "noWritePerms"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.createSymlink" $ do
+
+    -- successes --
+    it "createSymlink, all fine" $ do
+      createSymlink' "newSymL" "alreadyExists/"
+      removeFileIfExists "newSymL"
+
+    -- posix failures --
+    it "createSymlink, parent directories do not exist" $
+      createSymlink' "some/thing/dada" "lala"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "createSymlink, can't write to destination directory" $
+      createSymlink' "noWritePerms/newDir" "lala"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "createSymlink, can't write to destination directory" $
+      createSymlink' "noPerms/newDir" "lala"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "createSymlink, destination file already exists" $
+      createSymlink' "alreadyExists" "lala"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
--- a/hpath-io/test/HPath/IO/DeleteDirRecursiveSpec.hs
+++ b/hpath-io/test/HPath/IO/DeleteDirRecursiveSpec.hs
@@ -0,0 +1,116 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.DeleteDirRecursiveSpec where
+
+
+import Test.Hspec
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import System.Posix.Files.ByteString
+  (
+    getSymbolicLinkStatus
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "DeleteDirRecursiveSpec"
+  createTmpDir
+
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "file"
+  createDir' "dir"
+  createRegularFile' "dir/.keep"
+  createSymlink' "dirSym" "dir/"
+  createDir' "noPerms"
+  createRegularFile' "noPerms/.keep"
+  createDir' "noWritable"
+  createRegularFile' "noWritable/.keep"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  deleteFile' "file"
+  deleteFile' "dir/.keep"
+  deleteDir' "dir"
+  deleteFile' "dirSym"
+  deleteFile' "noPerms/.keep"
+  deleteDir' "noPerms"
+  deleteFile' "noWritable/.keep"
+  deleteDir' "noWritable"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.deleteDirRecursive" $ do
+
+    -- successes --
+    it "deleteDirRecursive, empty directory, all fine" $ do
+      createDir' "testDir"
+      deleteDirRecursive' "testDir"
+      getSymbolicLinkStatus "testDir"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "deleteDirRecursive, empty directory with null permissions, all fine" $ do
+      createDir' "noPerms/testDir"
+      noPerms "noPerms/testDir"
+      deleteDirRecursive' "noPerms/testDir"
+
+    it "deleteDirRecursive, non-empty directory, all fine" $ do
+      createDir' "nonEmpty"
+      createDir' "nonEmpty/dir1"
+      createDir' "nonEmpty/dir2"
+      createDir' "nonEmpty/dir2/dir3"
+      createRegularFile' "nonEmpty/file1"
+      createRegularFile' "nonEmpty/dir1/file2"
+      deleteDirRecursive' "nonEmpty"
+      getSymbolicLinkStatus "nonEmpty"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    -- posix failures --
+    it "deleteDirRecursive, can't open parent directory" $ do
+      createDir' "noPerms/foo"
+      noPerms "noPerms"
+      (deleteDirRecursive' "noPerms/foo")
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+      normalDirPerms "noPerms"
+      deleteDir' "noPerms/foo"
+
+    it "deleteDirRecursive, can't write to parent directory" $ do
+      createDir' "noWritable/foo"
+      noWritableDirPerms "noWritable"
+      (deleteDirRecursive' "noWritable/foo")
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+      normalDirPerms "noWritable"
+      deleteDir' "noWritable/foo"
+
+    it "deleteDirRecursive, wrong file type (symlink to directory)" $
+      deleteDirRecursive' "dirSym"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "deleteDirRecursive, wrong file type (regular file)" $
+      deleteDirRecursive' "file"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "deleteDirRecursive, directory does not exist" $
+      deleteDirRecursive' "doesNotExist"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+
--- a/hpath-io/test/HPath/IO/DeleteDirSpec.hs
+++ b/hpath-io/test/HPath/IO/DeleteDirSpec.hs
@@ -0,0 +1,114 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.DeleteDirSpec where
+
+
+import Test.Hspec
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import System.Posix.Files.ByteString
+  (
+    getSymbolicLinkStatus
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "DeleteDirSpec"
+  createTmpDir
+
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "file"
+  createDir' "dir"
+  createRegularFile' "dir/.keep"
+  createSymlink' "dirSym" "dir/"
+  createDir' "noPerms"
+  createRegularFile' "noPerms/.keep"
+  createDir' "noWritable"
+  createRegularFile' "noWritable/.keep"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  deleteFile' "file"
+  deleteFile' "dir/.keep"
+  deleteDir' "dir"
+  deleteFile' "dirSym"
+  deleteFile' "noPerms/.keep"
+  deleteDir' "noPerms"
+  deleteFile' "noWritable/.keep"
+  deleteDir' "noWritable"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.deleteDir" $ do
+
+    -- successes --
+    it "deleteDir, empty directory, all fine" $ do
+      createDir' "testDir"
+      deleteDir' "testDir"
+      getSymbolicLinkStatus "testDir"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "deleteDir, directory with null permissions, all fine" $ do
+      createDir' "noPerms/testDir"
+      noPerms "noPerms/testDir"
+      deleteDir' "noPerms/testDir"
+      getSymbolicLinkStatus "testDir"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    -- posix failures --
+    it "deleteDir, wrong file type (symlink to directory)" $
+      deleteDir' "dirSym"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "deleteDir, wrong file type (regular file)" $
+      deleteDir' "file"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "deleteDir, directory does not exist" $
+      deleteDir' "doesNotExist"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "deleteDir, directory not empty" $
+      deleteDir' "dir"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == UnsatisfiedConstraints)
+
+    it "deleteDir, can't open parent directory" $ do
+      createDir' "noPerms/foo"
+      noPerms "noPerms"
+      (deleteDir' "noPerms/foo")
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+      normalDirPerms "noPerms"
+      deleteDir' "noPerms/foo"
+
+    it "deleteDir, can't write to parent directory, still fine" $ do
+      createDir' "noWritable/foo"
+      noWritableDirPerms "noWritable"
+      (deleteDir' "noWritable/foo")
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+      normalDirPerms "noWritable"
+      deleteDir' "noWritable/foo"
+
+
+
--- a/hpath-io/test/HPath/IO/DeleteFileSpec.hs
+++ b/hpath-io/test/HPath/IO/DeleteFileSpec.hs
@@ -0,0 +1,84 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.DeleteFileSpec where
+
+
+import Test.Hspec
+import HPath.IO
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import System.Posix.Files.ByteString
+  (
+    getSymbolicLinkStatus
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "DeleteFileSpec"
+  createTmpDir
+
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "foo"
+  createSymlink' "syml" "foo"
+  createDir' "dir"
+  createDir' "noPerms"
+  noPerms "noPerms"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  deleteFile' "foo"
+  deleteFile' "syml"
+  deleteDir' "dir"
+  deleteDir' "noPerms"
+
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.deleteFile" $ do
+
+    -- successes --
+    it "deleteFile, regular file, all fine" $ do
+      createRegularFile' "testFile"
+      deleteFile' "testFile"
+      getSymbolicLinkStatus "testFile"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "deleteFile, symlink, all fine" $ do
+      recreateSymlink' "syml"
+                       "testFile"
+                       Strict
+      deleteFile' "testFile"
+      getSymbolicLinkStatus "testFile"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    -- posix failures --
+    it "deleteFile, wrong file type (directory)" $
+      deleteFile' "dir"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "deleteFile, file does not exist" $
+      deleteFile' "doesNotExist"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "deleteFile, can't read directory" $
+      deleteFile' "noPerms/blah"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
--- a/hpath-io/test/HPath/IO/GetDirsFilesSpec.hs
+++ b/hpath-io/test/HPath/IO/GetDirsFilesSpec.hs
@@ -0,0 +1,100 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.GetDirsFilesSpec where
+
+
+import Data.List
+  (
+    sort
+  )
+import qualified HPath as P
+import HPath.IO
+import Test.Hspec
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "GetDirsFilesSpec"
+  createTmpDir
+
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "file"
+  createRegularFile' "Lala"
+  createRegularFile' ".hidden"
+  createSymlink' "syml" "Lala"
+  createDir' "dir"
+  createSymlink' "dirsym" "dir"
+  createDir' "noPerms"
+  noPerms "noPerms"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  deleteFile' "file"
+  deleteFile' "Lala"
+  deleteFile' ".hidden"
+  deleteFile' "syml"
+  deleteDir' "dir"
+  deleteFile' "dirsym"
+  deleteDir' "noPerms"
+
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.getDirsFiles" $ do
+
+    -- successes --
+    it "getDirsFiles, all fine" $
+      withRawTmpDir $ \p -> do
+      expectedFiles <- mapM P.parseRel [".hidden"
+                                       ,"Lala"
+                                       ,"dir"
+                                       ,"dirsym"
+                                       ,"file"
+                                       ,"noPerms"
+                                       ,"syml"]
+      (fmap sort $ getDirsFiles p)
+        `shouldReturn` fmap (p P.</>) expectedFiles
+
+    -- posix failures --
+    it "getDirsFiles, nonexistent directory" $
+      getDirsFiles' "nothingHere"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "getDirsFiles, wrong file type (file)" $
+      getDirsFiles' "file"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "getDirsFiles, wrong file type (symlink to file)" $
+      getDirsFiles' "syml"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InvalidArgument)
+
+    it "getDirsFiles, wrong file type (symlink to dir)" $
+      getDirsFiles' "dirsym"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InvalidArgument)
+
+    it "getDirsFiles, can't open directory" $
+      getDirsFiles' "noPerms"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+
+
+
--- a/hpath-io/test/HPath/IO/GetFileTypeSpec.hs
+++ b/hpath-io/test/HPath/IO/GetFileTypeSpec.hs
@@ -0,0 +1,88 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.GetFileTypeSpec where
+
+
+import HPath.IO
+import Test.Hspec
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "GetFileTypeSpec"
+  createTmpDir
+
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "regularfile"
+  createSymlink' "symlink" "regularfile"
+  createSymlink' "brokenSymlink" "broken"
+  createDir' "directory"
+  createSymlink' "symlinkD" "directory"
+  createDir' "noPerms"
+  noPerms "noPerms"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  deleteFile' "regularfile"
+  deleteFile' "symlink"
+  deleteFile' "brokenSymlink"
+  deleteDir' "directory"
+  deleteFile' "symlinkD"
+  deleteDir' "noPerms"
+
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.getFileType" $ do
+
+    -- successes --
+    it "getFileType, regular file" $
+      getFileType' "regularfile"
+        `shouldReturn` RegularFile
+
+    it "getFileType, directory" $
+      getFileType' "directory"
+        `shouldReturn` Directory
+
+    it "getFileType, directory with null permissions" $
+      getFileType' "noPerms"
+        `shouldReturn` Directory
+
+    it "getFileType, symlink to file" $
+      getFileType' "symlink"
+        `shouldReturn` SymbolicLink
+
+    it "getFileType, symlink to directory" $
+      getFileType' "symlinkD"
+        `shouldReturn` SymbolicLink
+
+    it "getFileType, broken symlink" $
+      getFileType' "brokenSymlink"
+        `shouldReturn` SymbolicLink
+
+    -- posix failures --
+    it "getFileType, file does not exist" $
+      getFileType' "nothingHere"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "getFileType, can't open directory" $
+      getFileType' "noPerms/forz"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
--- a/hpath-io/test/HPath/IO/MoveFileOverwriteSpec.hs
+++ b/hpath-io/test/HPath/IO/MoveFileOverwriteSpec.hs
@@ -0,0 +1,126 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.MoveFileOverwriteSpec where
+
+
+import Test.Hspec
+import HPath.IO
+import HPath.IO.Errors
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "MoveFileOverwriteSpec"
+  createTmpDir
+
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "myFile"
+  createSymlink' "myFileL" "myFile"
+  createDir' "alreadyExistsD"
+  createDir' "dir"
+  createDir' "noPerms"
+  createDir' "noWritePerm"
+  noPerms "noPerms"
+  noWritableDirPerms "noWritePerm"
+  writeFile' "myFile" "Blahfaselgagaga"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "noWritePerm"
+  deleteFile' "myFile"
+  deleteFile' "myFileL"
+  deleteDir' "alreadyExistsD"
+  deleteDir' "dir"
+  deleteDir' "noPerms"
+  deleteDir' "noWritePerm"
+
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.moveFile" $ do
+
+    -- successes --
+    it "moveFile (Overwrite), all fine" $
+      moveFile' "myFile"
+                "movedFile"
+                Overwrite
+
+    it "moveFile (Overwrite), all fine" $
+      moveFile' "myFile"
+                "dir/movedFile"
+                Overwrite
+
+    it "moveFile (Overwrite), all fine on symlink" $
+      moveFile' "myFileL"
+                "movedFile"
+                Overwrite
+
+    it "moveFile (Overwrite), all fine on directory" $
+      moveFile' "dir"
+                "movedFile"
+                Overwrite
+
+    it "moveFile (Overwrite), destination file already exists" $
+      moveFile' "myFile"
+                "alreadyExists"
+                Overwrite
+
+    -- posix failures --
+    it "moveFile (Overwrite), source file does not exist" $
+      moveFile' "fileDoesNotExist"
+                "movedFile"
+                Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "moveFile (Overwrite), can't write to destination directory" $
+      moveFile' "myFile"
+                "noWritePerm/movedFile"
+                Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "moveFile (Overwrite), can't open destination directory" $
+      moveFile' "myFile"
+                "noPerms/movedFile"
+                Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "moveFile (Overwrite), can't open source directory" $
+      moveFile' "noPerms/myFile"
+                "movedFile"
+                Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    -- custom failures --
+
+    it "moveFile (Overwrite), move from file to dir" $
+      moveFile' "myFile"
+                "alreadyExistsD"
+                Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
+    it "moveFile (Overwrite), source and dest are same file" $
+      moveFile' "myFile"
+                "myFile"
+                Overwrite
+        `shouldThrow`
+        isSameFile
--- a/hpath-io/test/HPath/IO/MoveFileSpec.hs
+++ b/hpath-io/test/HPath/IO/MoveFileSpec.hs
@@ -0,0 +1,129 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.MoveFileSpec where
+
+
+import Test.Hspec
+import HPath.IO
+import HPath.IO.Errors
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "MoveFileSpec"
+  createTmpDir
+
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "myFile"
+  createSymlink' "myFileL" "myFile"
+  createRegularFile' "alreadyExists"
+  createDir' "alreadyExistsD"
+  createDir' "dir"
+  createDir' "noPerms"
+  createDir' "noWritePerm"
+  noPerms "noPerms"
+  noWritableDirPerms "noWritePerm"
+  writeFile' "myFile" "Blahfaselgagaga"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "noWritePerm"
+  deleteFile' "myFile"
+  deleteFile' "myFileL"
+  deleteFile' "alreadyExists"
+  deleteDir' "alreadyExistsD"
+  deleteDir' "dir"
+  deleteDir' "noPerms"
+  deleteDir' "noWritePerm"
+
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.moveFile" $ do
+
+    -- successes --
+    it "moveFile (Strict), all fine" $
+      moveFile' "myFile"
+                "movedFile"
+                Strict
+
+    it "moveFile (Strict), all fine" $
+      moveFile' "myFile"
+                "dir/movedFile"
+                Strict
+
+    it "moveFile (Strict), all fine on symlink" $
+      moveFile' "myFileL"
+                "movedFile"
+                Strict
+
+    it "moveFile (Strict), all fine on directory" $
+      moveFile' "dir"
+                "movedFile"
+                Strict
+
+    -- posix failures --
+    it "moveFile (Strict), source file does not exist" $
+      moveFile' "fileDoesNotExist"
+                "movedFile"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "moveFile (Strict), can't write to destination directory" $
+      moveFile' "myFile"
+                "noWritePerm/movedFile"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "moveFile (Strict), can't open destination directory" $
+      moveFile' "myFile"
+                "noPerms/movedFile"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "moveFile (Strict), can't open source directory" $
+      moveFile' "noPerms/myFile"
+                "movedFile"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    -- custom failures --
+    it "moveFile (Strict), destination file already exists" $
+      moveFile' "myFile"
+                "alreadyExists"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
+    it "moveFile (Strict), move from file to dir" $
+      moveFile' "myFile"
+                "alreadyExistsD"
+                Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
+    it "moveFile (Strict), source and dest are same file" $
+      moveFile' "myFile"
+                "myFile"
+                Strict
+        `shouldThrow`
+        isSameFile
--- a/hpath-io/test/HPath/IO/ReadFileEOFSpec.hs
+++ b/hpath-io/test/HPath/IO/ReadFileEOFSpec.hs
@@ -0,0 +1,85 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+
+module HPath.IO.ReadFileEOFSpec where
+
+
+import Test.Hspec
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "ReadFileEOFSpec"
+  createTmpDir
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "fileWithContent"
+  createRegularFile' "fileWithoutContent"
+  createSymlink' "inputFileSymL" "fileWithContent"
+  createDir' "alreadyExistsD"
+  createRegularFile' "noPerms"
+  noPerms "noPerms"
+  createDir' "noPermsD"
+  createRegularFile' "noPermsD/inputFile"
+  noPerms "noPermsD"
+  writeFile' "fileWithContent" "Blahfaselgagaga"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  deleteFile' "fileWithContent"
+  deleteFile' "fileWithoutContent"
+  deleteFile' "inputFileSymL"
+  deleteDir' "alreadyExistsD"
+  normalFilePerms "noPerms"
+  deleteFile' "noPerms"
+  normalDirPerms "noPermsD"
+  deleteFile' "noPermsD/inputFile"
+  deleteDir' "noPermsD"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.readFileEOF" $ do
+
+    -- successes --
+    it "readFileEOF (Strict) file with content, everything clear" $ do
+      out <- readFileEOF' "fileWithContent"
+      out `shouldBe` "Blahfaselgagaga"
+
+    it "readFileEOF (Strict) symlink, everything clear" $ do
+      out <- readFileEOF' "inputFileSymL"
+      out `shouldBe` "Blahfaselgagaga"
+
+    it "readFileEOF (Strict) empty file, everything clear" $ do
+      out <- readFileEOF' "fileWithoutContent"
+      out `shouldBe` ""
+
+
+    -- posix failures --
+    it "readFileEOF (Strict) directory, wrong file type" $ do
+      readFileEOF' "alreadyExistsD"
+        `shouldThrow` (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "readFileEOF (Strict) file, no permissions" $ do
+      readFileEOF' "noPerms"
+        `shouldThrow` (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "readFileEOF (Strict) file, no permissions on dir" $ do
+      readFileEOF' "noPermsD/inputFile"
+        `shouldThrow` (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "readFileEOF (Strict) file, no such file" $ do
+      readFileEOF' "lalala"
+        `shouldThrow` (\e -> ioeGetErrorType e == NoSuchThing)
--- a/hpath-io/test/HPath/IO/ReadFileSpec.hs
+++ b/hpath-io/test/HPath/IO/ReadFileSpec.hs
@@ -0,0 +1,85 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+
+module HPath.IO.ReadFileSpec where
+
+
+import Test.Hspec
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "ReadFileSpec"
+  createTmpDir
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "fileWithContent"
+  createRegularFile' "fileWithoutContent"
+  createSymlink' "inputFileSymL" "fileWithContent"
+  createDir' "alreadyExistsD"
+  createRegularFile' "noPerms"
+  noPerms "noPerms"
+  createDir' "noPermsD"
+  createRegularFile' "noPermsD/inputFile"
+  noPerms "noPermsD"
+  writeFile' "fileWithContent" "Blahfaselgagaga"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  deleteFile' "fileWithContent"
+  deleteFile' "fileWithoutContent"
+  deleteFile' "inputFileSymL"
+  deleteDir' "alreadyExistsD"
+  normalFilePerms "noPerms"
+  deleteFile' "noPerms"
+  normalDirPerms "noPermsD"
+  deleteFile' "noPermsD/inputFile"
+  deleteDir' "noPermsD"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.readFile" $ do
+
+    -- successes --
+    it "readFile (Strict) file with content, everything clear" $ do
+      out <- readFile' "fileWithContent"
+      out `shouldBe` "Blahfaselgagaga"
+
+    it "readFile (Strict) symlink, everything clear" $ do
+      out <- readFile' "inputFileSymL"
+      out `shouldBe` "Blahfaselgagaga"
+
+    it "readFile (Strict) empty file, everything clear" $ do
+      out <- readFile' "fileWithoutContent"
+      out `shouldBe` ""
+
+
+    -- posix failures --
+    it "readFile (Strict) directory, wrong file type" $ do
+      readFile' "alreadyExistsD"
+        `shouldThrow` (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "readFile (Strict) file, no permissions" $ do
+      readFile' "noPerms"
+        `shouldThrow` (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "readFile (Strict) file, no permissions on dir" $ do
+      readFile' "noPermsD/inputFile"
+        `shouldThrow` (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "readFile (Strict) file, no such file" $ do
+      readFile' "lalala"
+        `shouldThrow` (\e -> ioeGetErrorType e == NoSuchThing)
--- a/hpath-io/test/HPath/IO/RecreateSymlinkOverwriteSpec.hs
+++ b/hpath-io/test/HPath/IO/RecreateSymlinkOverwriteSpec.hs
@@ -0,0 +1,139 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.RecreateSymlinkOverwriteSpec where
+
+
+-- TODO: exception if destination exists but is not a file + `OverWrite` CopyMode
+
+
+import Test.Hspec
+import HPath.IO
+import HPath.IO.Errors
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "RecreateSymlinkOverwriteSpec"
+  createTmpDir
+
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "myFile"
+  createSymlink' "myFileL" "myFile"
+  createRegularFile' "alreadyExists"
+  createDir' "alreadyExistsD"
+  createDir' "dir"
+  createDir' "noPerms"
+  createDir' "noWritePerm"
+  createDir' "alreadyExistsD2"
+  createRegularFile' "alreadyExistsD2/lala"
+  noPerms "noPerms"
+  noWritableDirPerms "noWritePerm"
+  writeFile' "myFile" "Blahfaselgagaga"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "noWritePerm"
+  deleteFile' "myFile"
+  deleteFile' "myFileL"
+  deleteFile' "alreadyExists"
+  deleteFile' "alreadyExistsD2/lala"
+  deleteDir' "alreadyExistsD"
+  deleteDir' "alreadyExistsD2"
+  deleteDir' "dir"
+  deleteDir' "noPerms"
+  deleteDir' "noWritePerm"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.recreateSymlink" $ do
+
+    -- successes --
+    it "recreateSymLink (Overwrite), all fine" $ do
+      recreateSymlink' "myFileL"
+                       "movedFile"
+                       Overwrite
+      removeFileIfExists "movedFile"
+
+    it "recreateSymLink (Overwrite), all fine" $ do
+      recreateSymlink' "myFileL"
+                       "dir/movedFile"
+                       Overwrite
+      removeFileIfExists "dir/movedFile"
+
+    it "recreateSymLink (Overwrite), destination file already exists" $
+      recreateSymlink' "myFileL"
+                       "alreadyExists"
+                       Overwrite
+
+    it "recreateSymLink (Overwrite), destination already exists and is an empty dir" $ do
+      recreateSymlink' "myFileL"
+                       "alreadyExistsD"
+                       Overwrite
+      deleteFile' "alreadyExistsD"
+      createDir' "alreadyExistsD"
+
+    -- posix failures --
+    it "recreateSymLink (Overwrite), destination already exists and is a non-empty dir" $
+      recreateSymlink' "myFileL"
+                       "alreadyExistsD2"
+                       Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == UnsatisfiedConstraints)
+
+    it "recreateSymLink (Overwrite), wrong input type (file)" $
+      recreateSymlink' "myFile"
+                       "movedFile"
+                       Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InvalidArgument)
+
+    it "recreateSymLink (Overwrite), wrong input type (directory)" $
+      recreateSymlink' "dir"
+                       "movedFile"
+                       Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InvalidArgument)
+
+    it "recreateSymLink (Overwrite), can't write to destination directory" $
+      recreateSymlink' "myFileL"
+                       "noWritePerm/movedFile"
+                       Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "recreateSymLink (Overwrite), can't open destination directory" $
+      recreateSymlink' "myFileL"
+                       "noPerms/movedFile"
+                       Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "recreateSymLink (Overwrite), can't open source directory" $
+      recreateSymlink' "noPerms/myFileL"
+                       "movedFile"
+                       Overwrite
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    -- custom failures --
+    it "recreateSymLink (Overwrite), source and destination are the same file" $
+      recreateSymlink' "myFileL"
+                       "myFileL"
+                       Overwrite
+        `shouldThrow`
+        isSameFile
+
--- a/hpath-io/test/HPath/IO/RecreateSymlinkSpec.hs
+++ b/hpath-io/test/HPath/IO/RecreateSymlinkSpec.hs
@@ -0,0 +1,130 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.RecreateSymlinkSpec where
+
+
+
+
+import Test.Hspec
+import HPath.IO
+import HPath.IO.Errors
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "RecreateSymlinkSpec"
+  createTmpDir
+
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "myFile"
+  createSymlink' "myFileL" "myFile"
+  createRegularFile' "alreadyExists"
+  createDir' "alreadyExistsD"
+  createDir' "dir"
+  createDir' "noPerms"
+  createDir' "noWritePerm"
+  noPerms "noPerms"
+  noWritableDirPerms "noWritePerm"
+  writeFile' "myFile" "Blahfaselgagaga"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "noWritePerm"
+  deleteFile' "myFile"
+  deleteFile' "myFileL"
+  deleteFile' "alreadyExists"
+  deleteDir' "alreadyExistsD"
+  deleteDir' "dir"
+  deleteDir' "noPerms"
+  deleteDir' "noWritePerm"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.recreateSymlink" $ do
+
+    -- successes --
+    it "recreateSymLink (Strict), all fine" $ do
+      recreateSymlink' "myFileL"
+                       "movedFile"
+                       Strict
+      removeFileIfExists "movedFile"
+
+    it "recreateSymLink (Strict), all fine" $ do
+      recreateSymlink' "myFileL"
+                       "dir/movedFile"
+                       Strict
+      removeFileIfExists "dir/movedFile"
+
+    -- posix failures --
+    it "recreateSymLink (Strict), wrong input type (file)" $
+      recreateSymlink' "myFile"
+                       "movedFile"
+                       Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InvalidArgument)
+
+    it "recreateSymLink (Strict), wrong input type (directory)" $
+      recreateSymlink' "dir"
+                       "movedFile"
+                       Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == InvalidArgument)
+
+    it "recreateSymLink (Strict), can't write to destination directory" $
+      recreateSymlink' "myFileL"
+                       "noWritePerm/movedFile"
+                       Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "recreateSymLink (Strict), can't open destination directory" $
+      recreateSymlink' "myFileL"
+                       "noPerms/movedFile"
+                       Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "recreateSymLink (Strict), can't open source directory" $
+      recreateSymlink' "noPerms/myFileL"
+                       "movedFile"
+                       Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "recreateSymLink (Strict), destination file already exists" $
+      recreateSymlink' "myFileL"
+                       "alreadyExists"
+                       Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
+    it "recreateSymLink (Strict), destination already exists and is a dir" $
+      recreateSymlink' "myFileL"
+                       "alreadyExistsD"
+                       Strict
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
+    -- custom failures --
+    it "recreateSymLink (Strict), source and destination are the same file" $
+      recreateSymlink' "myFileL"
+                       "myFileL"
+                       Strict
+        `shouldThrow`
+        isSameFile
+
--- a/hpath-io/test/HPath/IO/RenameFileSpec.hs
+++ b/hpath-io/test/HPath/IO/RenameFileSpec.hs
@@ -0,0 +1,117 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module HPath.IO.RenameFileSpec where
+
+
+import Test.Hspec
+import HPath.IO.Errors
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "RenameFileSpec"
+  createTmpDir
+
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "myFile"
+  createSymlink' "myFileL" "myFile"
+  createRegularFile' "alreadyExists"
+  createDir' "alreadyExistsD"
+  createDir' "dir"
+  createDir' "noPerms"
+  createDir' "noWritePerm"
+  noPerms "noPerms"
+  noWritableDirPerms "noWritePerm"
+  writeFile' "myFile" "Blahfaselgagaga"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  normalDirPerms "noPerms"
+  normalDirPerms "noWritePerm"
+  deleteFile' "myFile"
+  deleteFile' "myFileL"
+  deleteFile' "alreadyExists"
+  deleteDir' "alreadyExistsD"
+  deleteDir' "dir"
+  deleteDir' "noPerms"
+  deleteDir' "noWritePerm"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.renameFile" $ do
+
+    -- successes --
+    it "renameFile, all fine" $
+      renameFile' "myFile"
+                  "renamedFile"
+
+    it "renameFile, all fine" $
+      renameFile' "myFile"
+                  "dir/renamedFile"
+
+    it "renameFile, all fine on symlink" $
+      renameFile' "myFileL"
+                  "renamedFile"
+
+    it "renameFile, all fine on directory" $
+      renameFile' "dir"
+                  "renamedFile"
+
+    -- posix failures --
+    it "renameFile, source file does not exist" $
+      renameFile' "fileDoesNotExist"
+                  "renamedFile"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == NoSuchThing)
+
+    it "renameFile, can't write to output directory" $
+      renameFile' "myFile"
+                  "noWritePerm/renamedFile"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "renameFile, can't open output directory" $
+      renameFile' "myFile"
+                  "noPerms/renamedFile"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "renameFile, can't open source directory" $
+      renameFile' "noPerms/myFile"
+                  "renamedFile"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == PermissionDenied)
+
+    -- custom failures --
+    it "renameFile, destination file already exists" $
+      renameFile' "myFile"
+                  "alreadyExists"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
+    it "renameFile, move from file to dir" $
+      renameFile' "myFile"
+                  "alreadyExistsD"
+        `shouldThrow`
+        (\e -> ioeGetErrorType e == AlreadyExists)
+
+    it "renameFile, source and dest are same file" $
+      renameFile' "myFile"
+                  "myFile"
+        `shouldThrow`
+        isSameFile
+
--- a/hpath-io/test/HPath/IO/ToAbsSpec.hs
+++ b/hpath-io/test/HPath/IO/ToAbsSpec.hs
@@ -0,0 +1,27 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+
+module HPath.IO.ToAbsSpec where
+
+
+import Test.Hspec
+import HPath
+import HPath.IO
+
+
+
+spec :: Spec
+spec = describe "HPath.IO.toAbs" $ do
+
+    -- successes --
+    it "toAbs returns absolute paths unchanged" $ do
+      p1 <- parseAbs "/a/b/c/d"
+      to <- toAbs p1
+      p1 `shouldBe` to
+
+    it "toAbs returns even existing absolute paths unchanged" $ do
+      p1 <- parseAbs "/home"
+      to <- toAbs p1
+      p1 `shouldBe` to
+
+
--- a/hpath-io/test/HPath/IO/WriteFileSpec.hs
+++ b/hpath-io/test/HPath/IO/WriteFileSpec.hs
@@ -0,0 +1,108 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+
+module HPath.IO.WriteFileSpec where
+
+
+import Test.Hspec
+import System.IO.Error
+  (
+    ioeGetErrorType
+  )
+import GHC.IO.Exception
+  (
+    IOErrorType(..)
+  )
+import Utils
+
+
+
+upTmpDir :: IO ()
+upTmpDir = do
+  setTmpDir "WriteFileSpec"
+  createTmpDir
+
+setupFiles :: IO ()
+setupFiles = do
+  createRegularFile' "fileWithContent"
+  createRegularFile' "fileWithoutContent"
+  createSymlink' "inputFileSymL" "fileWithContent"
+  createDir' "alreadyExistsD"
+  createRegularFile' "noPerms"
+  noPerms "noPerms"
+  createDir' "noPermsD"
+  createRegularFile' "noPermsD/inputFile"
+  noPerms "noPermsD"
+  writeFile' "fileWithContent" "BLKASL"
+
+
+cleanupFiles :: IO ()
+cleanupFiles = do
+  deleteFile' "fileWithContent"
+  deleteFile' "fileWithoutContent"
+  deleteFile' "inputFileSymL"
+  deleteDir' "alreadyExistsD"
+  normalFilePerms "noPerms"
+  deleteFile' "noPerms"
+  normalDirPerms "noPermsD"
+  deleteFile' "noPermsD/inputFile"
+  deleteDir' "noPermsD"
+
+
+spec :: Spec
+spec = beforeAll_ (upTmpDir >> setupFiles) $ afterAll_ cleanupFiles $
+  describe "HPath.IO.writeFile" $ do
+
+    -- successes --
+    it "writeFile file with content, everything clear" $ do
+      writeFile' "fileWithContent" "blahfaselllll"
+      out <- readFile' "fileWithContent"
+      out `shouldBe` "blahfaselllll"
+
+    it "writeFile file with content, everything clear" $ do
+      writeFile' "fileWithContent" "gagagaga"
+      out <- readFile' "fileWithContent"
+      out `shouldBe` "gagagaga"
+
+    it "writeFile file with content, everything clear" $ do
+      writeFile' "fileWithContent" ""
+      out <- readFile' "fileWithContent"
+      out `shouldBe` ""
+
+    it "writeFile file without content, everything clear" $ do
+      writeFile' "fileWithoutContent" "blahfaselllll"
+      out <- readFile' "fileWithoutContent"
+      out `shouldBe` "blahfaselllll"
+
+    it "writeFile, everything clear" $ do
+      writeFile' "fileWithoutContent" "gagagaga"
+      out <- readFile' "fileWithoutContent"
+      out `shouldBe` "gagagaga"
+
+    it "writeFile symlink, everything clear" $ do
+      writeFile' "inputFileSymL" "blahfaselllll"
+      out <- readFile' "inputFileSymL"
+      out `shouldBe` "blahfaselllll"
+
+    it "writeFile symlink, everything clear" $ do
+      writeFile' "inputFileSymL" "gagagaga"
+      out <- readFile' "inputFileSymL"
+      out `shouldBe` "gagagaga"
+
+
+    -- posix failures --
+    it "writeFile to dir, inappropriate type" $ do
+      writeFile' "alreadyExistsD" ""
+        `shouldThrow` (\e -> ioeGetErrorType e == InappropriateType)
+
+    it "writeFile, no permissions to file" $ do
+      writeFile' "noPerms" ""
+        `shouldThrow` (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "writeFile, no permissions to file" $ do
+      writeFile' "noPermsD/inputFile" ""
+        `shouldThrow` (\e -> ioeGetErrorType e == PermissionDenied)
+
+    it "writeFile, file does not exist" $ do
+      writeFile' "gaga" ""
+        `shouldThrow` (\e -> ioeGetErrorType e == NoSuchThing)
--- a/hpath-io/test/Main.hs
+++ b/hpath-io/test/Main.hs
@@ -0,0 +1,24 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+import qualified Data.ByteString as BS
+import Data.IORef
+import Test.Hspec
+import Test.Hspec.Runner
+import Test.Hspec.Formatters
+import qualified Spec
+import Utils
+import System.Posix.Temp.ByteString (mkdtemp)
+
+
+-- TODO: chardev, blockdev, namedpipe, socket
+
+
+main :: IO ()
+main = do
+  tmpBase <- mkdtemp "/tmp/"
+  writeIORef baseTmpDir (Just (tmpBase `BS.append` "/"))
+  putStrLn $ ("Temporary test directory at: " <> show tmpBase)
+  hspecWith
+    defaultConfig { configFormatter = Just progress }
+    $ afterAll_ deleteBaseTmpDir
+    $ Spec.spec
--- a/hpath-io/test/Spec.hs
+++ b/hpath-io/test/Spec.hs
@@ -0,0 +1,2 @@
+-- file test/Spec.hs
+{-# OPTIONS_GHC -F -pgmF hspec-discover -optF --module-name=Spec #-}
--- a/hpath-io/test/Utils.hs
+++ b/hpath-io/test/Utils.hs
@@ -0,0 +1,290 @@
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE PackageImports #-}
+
+
+module Utils where
+
+
+import Control.Applicative
+  (
+    (<$>)
+  )
+import Control.Monad
+  (
+    forM_
+  , void
+  )
+import Control.Monad.IfElse
+  (
+    whenM
+  )
+import qualified Data.ByteString as BS
+import Data.IORef
+  (
+    newIORef
+  , readIORef
+  , writeIORef
+  , IORef
+  )
+import HPath.IO
+import HPath.IO.Errors
+import Prelude hiding (appendFile, readFile, writeFile)
+import Data.Maybe
+  (
+    fromJust
+  )
+import qualified HPath as P
+import System.IO.Unsafe
+  (
+    unsafePerformIO
+  )
+import qualified System.Posix.Directory.Traversals as DT
+import Data.ByteString
+  (
+    ByteString
+  )
+import qualified Data.ByteString.Lazy as L
+import System.Posix.Files.ByteString
+  (
+    groupExecuteMode
+  , groupReadMode
+  , nullFileMode
+  , otherExecuteMode
+  , otherReadMode
+  , ownerExecuteMode
+  , ownerReadMode
+  , setFileMode
+  , unionFileModes
+  )
+
+baseTmpDir :: IORef (Maybe ByteString)
+{-# NOINLINE baseTmpDir #-}
+baseTmpDir = unsafePerformIO (newIORef Nothing)
+
+
+tmpDir :: IORef (Maybe ByteString)
+{-# NOINLINE tmpDir #-}
+tmpDir = unsafePerformIO (newIORef Nothing)
+
+
+
+    -----------------
+    --[ Utilities ]--
+    -----------------
+
+
+setTmpDir :: ByteString -> IO ()
+{-# NOINLINE setTmpDir #-}
+setTmpDir bs = do
+  tmp <- fromJust <$> readIORef baseTmpDir
+  writeIORef tmpDir (Just (tmp `BS.append` bs))
+
+
+createTmpDir :: IO ()
+{-# NOINLINE createTmpDir #-}
+createTmpDir = do
+  tmp <- P.parseAbs =<< (fromJust <$> readIORef tmpDir)
+  void $ createDir newDirPerms tmp
+
+
+deleteTmpDir :: IO ()
+{-# NOINLINE deleteTmpDir #-}
+deleteTmpDir = do
+  tmp <- P.parseAbs  =<< (fromJust <$> readIORef tmpDir)
+  void $ deleteDir tmp
+
+
+deleteBaseTmpDir :: IO ()
+{-# NOINLINE deleteBaseTmpDir #-}
+deleteBaseTmpDir = do
+  tmp <- (fromJust <$> readIORef baseTmpDir) >>= P.parseAbs
+  contents <- getDirsFiles tmp
+  forM_ contents deleteDir
+  void $ deleteDir tmp
+
+
+withRawTmpDir :: (P.Path P.Abs -> IO a) -> IO a
+{-# NOINLINE withRawTmpDir #-}
+withRawTmpDir f = do
+  tmp <- P.parseAbs =<< (fromJust <$> readIORef tmpDir)
+  f tmp
+
+
+getRawTmpDir :: IO ByteString
+{-# NOINLINE getRawTmpDir #-}
+getRawTmpDir = withRawTmpDir (return . flip BS.append "/" . P.fromAbs)
+
+
+withTmpDir :: ByteString -> (P.Path P.Abs -> IO a) -> IO a
+{-# NOINLINE withTmpDir #-}
+withTmpDir ip f = do
+  tmp <- P.parseAbs =<< (fromJust <$> readIORef tmpDir)
+  p <- (tmp P.</>) <$> P.parseRel ip
+  f p
+
+
+withTmpDir' :: ByteString
+            -> ByteString
+            -> (P.Path P.Abs -> P.Path P.Abs -> IO a)
+            -> IO a
+{-# NOINLINE withTmpDir' #-}
+withTmpDir' ip1 ip2 f = do
+  tmp <- P.parseAbs =<< (fromJust <$> readIORef tmpDir)
+  p1 <- (tmp P.</>) <$> P.parseRel ip1
+  p2 <- (tmp P.</>) <$> P.parseRel ip2
+  f p1 p2
+
+
+removeFileIfExists :: ByteString -> IO ()
+{-# NOINLINE removeFileIfExists #-}
+removeFileIfExists bs =
+  withTmpDir bs $ \p -> whenM (doesFileExist p) (deleteFile p)
+
+
+removeDirIfExists :: ByteString -> IO ()
+{-# NOINLINE removeDirIfExists #-}
+removeDirIfExists bs =
+  withTmpDir bs $ \p -> whenM (doesDirectoryExist p) (deleteDirRecursive p)
+
+
+copyFile' :: ByteString -> ByteString -> CopyMode -> IO ()
+{-# NOINLINE copyFile' #-}
+copyFile' inputFileP outputFileP cm =
+  withTmpDir' inputFileP outputFileP (\p1 p2 -> copyFile p1 p2 cm)
+
+
+copyDirRecursive' :: ByteString -> ByteString
+                  -> CopyMode -> RecursiveErrorMode -> IO ()
+{-# NOINLINE copyDirRecursive' #-}
+copyDirRecursive' inputDirP outputDirP cm rm =
+  withTmpDir' inputDirP outputDirP (\p1 p2 -> copyDirRecursive p1 p2 cm rm)
+
+
+createDir' :: ByteString -> IO ()
+{-# NOINLINE createDir' #-}
+createDir' dest = withTmpDir dest (createDir newDirPerms)
+
+createDirRecursive' :: ByteString -> IO ()
+{-# NOINLINE createDirRecursive' #-}
+createDirRecursive' dest = withTmpDir dest (createDirRecursive newDirPerms)
+
+createRegularFile' :: ByteString -> IO ()
+{-# NOINLINE createRegularFile' #-}
+createRegularFile' dest = withTmpDir dest (createRegularFile newFilePerms)
+
+
+createSymlink' :: ByteString -> ByteString -> IO ()
+{-# NOINLINE createSymlink' #-}
+createSymlink' dest sympoint = withTmpDir dest
+  (\x -> createSymlink x sympoint)
+
+
+renameFile' :: ByteString -> ByteString -> IO ()
+{-# NOINLINE renameFile' #-}
+renameFile' inputFileP outputFileP =
+  withTmpDir' inputFileP outputFileP $ \i o -> do
+    renameFile i o
+    renameFile o i
+
+
+moveFile' :: ByteString -> ByteString -> CopyMode -> IO ()
+{-# NOINLINE moveFile' #-}
+moveFile' inputFileP outputFileP cm =
+  withTmpDir' inputFileP outputFileP $ \i o -> do
+    moveFile i o cm
+    moveFile o i Strict
+
+
+recreateSymlink' :: ByteString -> ByteString -> CopyMode -> IO ()
+{-# NOINLINE recreateSymlink' #-}
+recreateSymlink' inputFileP outputFileP cm =
+  withTmpDir' inputFileP outputFileP (\p1 p2 -> recreateSymlink p1 p2 cm)
+
+
+noWritableDirPerms :: ByteString -> IO ()
+{-# NOINLINE noWritableDirPerms #-}
+noWritableDirPerms path = withTmpDir path $ \p ->
+  setFileMode (P.fromAbs p) perms
+  where
+    perms =            ownerReadMode
+      `unionFileModes` ownerExecuteMode
+      `unionFileModes` groupReadMode
+      `unionFileModes` groupExecuteMode
+      `unionFileModes` otherReadMode
+      `unionFileModes` otherExecuteMode
+
+
+noPerms :: ByteString -> IO ()
+{-# NOINLINE noPerms #-}
+noPerms path = withTmpDir path $ \p -> setFileMode (P.fromAbs p) nullFileMode
+
+
+normalDirPerms :: ByteString -> IO ()
+{-# NOINLINE normalDirPerms #-}
+normalDirPerms path =
+  withTmpDir path $ \p -> setFileMode (P.fromAbs p) newDirPerms
+
+
+normalFilePerms :: ByteString -> IO ()
+{-# NOINLINE normalFilePerms #-}
+normalFilePerms path =
+  withTmpDir path $ \p -> setFileMode (P.fromAbs p) newFilePerms
+
+
+getFileType' :: ByteString -> IO FileType
+{-# NOINLINE getFileType' #-}
+getFileType' path = withTmpDir path getFileType
+
+
+getDirsFiles' :: ByteString -> IO [P.Path P.Abs]
+{-# NOINLINE getDirsFiles' #-}
+getDirsFiles' path = withTmpDir path getDirsFiles
+
+
+deleteFile' :: ByteString -> IO ()
+{-# NOINLINE deleteFile' #-}
+deleteFile' p = withTmpDir p deleteFile
+
+
+deleteDir' :: ByteString -> IO ()
+{-# NOINLINE deleteDir' #-}
+deleteDir' p = withTmpDir p deleteDir
+
+
+deleteDirRecursive' :: ByteString -> IO ()
+{-# NOINLINE deleteDirRecursive' #-}
+deleteDirRecursive' p = withTmpDir p deleteDirRecursive
+
+
+canonicalizePath' :: ByteString -> IO (P.Path P.Abs)
+{-# NOINLINE canonicalizePath' #-}
+canonicalizePath' p = withTmpDir p canonicalizePath
+
+
+writeFile' :: ByteString -> ByteString -> IO ()
+{-# NOINLINE writeFile' #-}
+writeFile' ip bs = 
+  withTmpDir ip $ \p -> writeFile p bs
+
+
+appendFile' :: ByteString -> ByteString -> IO ()
+{-# NOINLINE appendFile' #-}
+appendFile' ip bs =
+  withTmpDir ip $ \p -> appendFile p bs
+
+
+allDirectoryContents' :: ByteString -> IO [ByteString]
+{-# NOINLINE allDirectoryContents' #-}
+allDirectoryContents' ip =
+  withTmpDir ip $ \p -> DT.allDirectoryContents' (P.fromAbs p)
+
+
+readFile' :: ByteString -> IO ByteString
+{-# NOINLINE readFile' #-}
+readFile' p = withTmpDir p readFile
+
+
+readFileEOF' :: ByteString -> IO L.ByteString
+{-# NOINLINE readFileEOF' #-}
+readFileEOF' p = withTmpDir p readFileEOF
+