1 -----------------------------------------------------------------------------
3 -- Module : System.Directory
4 -- Copyright : (c) The University of Glasgow 2001
5 -- License : BSD-style (see the file libraries/base/LICENSE)
7 -- Maintainer : libraries@haskell.org
9 -- Portability : portable
11 -- System-independent interface to directory manipulation.
13 -----------------------------------------------------------------------------
15 module System.Directory
19 -- * Actions on directories
20 createDirectory -- :: FilePath -> IO ()
21 , createDirectoryIfMissing -- :: Bool -> FilePath -> IO ()
22 , removeDirectory -- :: FilePath -> IO ()
23 , removeDirectoryRecursive -- :: FilePath -> IO ()
24 , renameDirectory -- :: FilePath -> FilePath -> IO ()
26 , getDirectoryContents -- :: FilePath -> IO [FilePath]
27 , getCurrentDirectory -- :: IO FilePath
28 , setCurrentDirectory -- :: FilePath -> IO ()
30 -- * Pre-defined directories
32 , getAppUserDataDirectory
33 , getUserDocumentsDirectory
34 , getTemporaryDirectory
37 , removeFile -- :: FilePath -> IO ()
38 , renameFile -- :: FilePath -> FilePath -> IO ()
39 , copyFile -- :: FilePath -> FilePath -> IO ()
45 , doesFileExist -- :: FilePath -> IO Bool
46 , doesDirectoryExist -- :: FilePath -> IO Bool
54 readable, -- :: Permissions -> Bool
55 writable, -- :: Permissions -> Bool
56 executable, -- :: Permissions -> Bool
57 searchable -- :: Permissions -> Bool
60 , getPermissions -- :: FilePath -> IO Permissions
61 , setPermissions -- :: FilePath -> Permissions -> IO ()
65 , getModificationTime -- :: FilePath -> IO ClockTime
68 import System.Directory.Internals
69 import System.Environment ( getEnv )
70 import System.IO.Error
71 import Control.Monad ( when, unless )
82 #if defined(__GLASGOW_HASKELL__) || defined(mingw32_HOST_OS)
87 #ifdef __GLASGOW_HASKELL__
90 import Control.Exception ( bracket )
91 import System.Posix.Types
92 import System.Posix.Internals
93 import System.Time ( ClockTime(..) )
96 import GHC.IOBase ( IOException(..), IOErrorType(..), ioException )
99 A directory contains a series of entries, each of which is a named
100 reference to a file system object (file, directory etc.). Some
101 entries may be hidden, inaccessible, or have some administrative
102 function (e.g. `.' or `..' under POSIX
103 <http://www.opengroup.org/onlinepubs/007904975/toc.htm>), but in
104 this standard all such entries are considered to form part of the
105 directory contents. Entries in sub-directories are not, however,
106 considered to form part of the directory contents.
108 Each file system object is referenced by a /path/. There is
109 normally at least one absolute path to each file system object. In
110 some operating systems, it may also be possible to have paths which
111 are relative to the current directory.
114 -----------------------------------------------------------------------------
119 The 'Permissions' type is used to record whether certain operations are
120 permissible on a file\/directory. 'getPermissions' and 'setPermissions'
121 get and set these permissions, respectively. Permissions apply both to
122 files and directories. For directories, the executable field will be
123 'False', and for files the searchable field will be 'False'. Note that
124 directories may be searchable without being readable, if permission has
125 been given to use them as part of a path, but not to examine the
128 Note that to change some, but not all permissions, a construct on the following lines must be used.
130 > makeReadable f = do
131 > p <- getPermissions f
132 > setPermissions f (p {readable = True})
139 executable, searchable :: Bool
140 } deriving (Eq, Ord, Read, Show)
142 {- |The 'getPermissions' operation returns the
143 permissions for the file or directory.
145 The operation may fail with:
147 * 'isPermissionError' if the user is not permitted to access
150 * 'isDoesNotExistError' if the file or directory does not exist.
154 getPermissions :: FilePath -> IO Permissions
155 getPermissions name = do
156 withCString name $ \s -> do
157 read <- c_access s r_OK
158 write <- c_access s w_OK
159 exec <- c_access s x_OK
160 withFileStatus "getPermissions" name $ \st -> do
161 is_dir <- isDirectory st
164 readable = read == 0,
165 writable = write == 0,
166 executable = not is_dir && exec == 0,
167 searchable = is_dir && exec == 0
171 {- |The 'setPermissions' operation sets the
172 permissions for the file or directory.
174 The operation may fail with:
176 * 'isPermissionError' if the user is not permitted to set
179 * 'isDoesNotExistError' if the file or directory does not exist.
183 setPermissions :: FilePath -> Permissions -> IO ()
184 setPermissions name (Permissions r w e s) = do
185 allocaBytes sizeof_stat $ \ p_stat -> do
186 withCString name $ \p_name -> do
187 throwErrnoIfMinus1_ "setPermissions" $ do
189 mode <- st_mode p_stat
190 let mode1 = modifyBit r mode s_IRUSR
191 let mode2 = modifyBit w mode1 s_IWUSR
192 let mode3 = modifyBit (e || s) mode2 s_IXUSR
196 modifyBit :: Bool -> CMode -> CMode -> CMode
197 modifyBit False m b = m .&. (complement b)
198 modifyBit True m b = m .|. b
201 copyPermissions :: FilePath -> FilePath -> IO ()
202 copyPermissions source dest = do
203 allocaBytes sizeof_stat $ \ p_stat -> do
204 withCString source $ \p_source -> do
205 withCString dest $ \p_dest -> do
206 throwErrnoIfMinus1_ "copyPermissions" $ c_stat p_source p_stat
207 mode <- st_mode p_stat
208 throwErrnoIfMinus1_ "copyPermissions" $ c_chmod p_dest mode
210 -----------------------------------------------------------------------------
213 {- |@'createDirectory' dir@ creates a new directory @dir@ which is
214 initially empty, or as near to empty as the operating system
217 The operation may fail with:
219 * 'isPermissionError' \/ 'PermissionDenied'
220 The process has insufficient privileges to perform the operation.
223 * 'isAlreadyExistsError' \/ 'AlreadyExists'
224 The operand refers to a directory that already exists.
228 A physical I\/O error has occurred.
232 The operand is not a valid directory name.
233 @[ENAMETOOLONG, ELOOP]@
236 There is no path to the directory.
239 * 'ResourceExhausted'
240 Insufficient resources (virtual memory, process file descriptors,
241 physical disk space, etc.) are available to perform the operation.
242 @[EDQUOT, ENOSPC, ENOMEM, EMLINK]@
244 * 'InappropriateType'
245 The path refers to an existing non-directory object.
250 createDirectory :: FilePath -> IO ()
251 createDirectory path = do
252 modifyIOError (`ioeSetFileName` path) $
253 withCString path $ \s -> do
254 throwErrnoIfMinus1Retry_ "createDirectory" $
257 #else /* !__GLASGOW_HASKELL__ */
259 copyPermissions :: FilePath -> FilePath -> IO ()
260 copyPermissions fromFPath toFPath
261 = getPermissions fromFPath >>= setPermissions toFPath
265 -- | @'createDirectoryIfMissing' parents dir@ creates a new directory
266 -- @dir@ if it doesn\'t exist. If the first argument is 'True'
267 -- the function will also create all parent directories if they are missing.
268 createDirectoryIfMissing :: Bool -- ^ Create its parents too?
269 -> FilePath -- ^ The path to the directory you want to make
271 createDirectoryIfMissing parents file = do
272 b <- doesDirectoryExist file
273 case (b,parents, file) of
274 (_, _, "") -> return ()
275 (True, _, _) -> return ()
276 (_, True, _) -> mapM_ (createDirectoryIfMissing False) (tail (pathParents file))
277 (_, False, _) -> createDirectory file
279 #if __GLASGOW_HASKELL__
280 {- | @'removeDirectory' dir@ removes an existing directory /dir/. The
281 implementation may specify additional constraints which must be
282 satisfied before a directory can be removed (e.g. the directory has to
283 be empty, or may not be in use by other processes). It is not legal
284 for an implementation to partially remove a directory unless the
285 entire directory is removed. A conformant implementation need not
286 support directory removal in all situations (e.g. removal of the root
289 The operation may fail with:
292 A physical I\/O error has occurred.
296 The operand is not a valid directory name.
297 [ENAMETOOLONG, ELOOP]
299 * 'isDoesNotExistError' \/ 'NoSuchThing'
300 The directory does not exist.
303 * 'isPermissionError' \/ 'PermissionDenied'
304 The process has insufficient privileges to perform the operation.
305 @[EROFS, EACCES, EPERM]@
307 * 'UnsatisfiedConstraints'
308 Implementation-dependent constraints are not satisfied.
309 @[EBUSY, ENOTEMPTY, EEXIST]@
311 * 'UnsupportedOperation'
312 The implementation does not support removal in this situation.
315 * 'InappropriateType'
316 The operand refers to an existing non-directory object.
321 removeDirectory :: FilePath -> IO ()
322 removeDirectory path = do
323 modifyIOError (`ioeSetFileName` path) $
324 withCString path $ \s ->
325 throwErrnoIfMinus1Retry_ "removeDirectory" (c_rmdir s)
328 -- | @'removeDirectoryRecursive' dir@ removes an existing directory /dir/
329 -- together with its content and all subdirectories. Be careful,
330 -- if the directory contains symlinks, the function will follow them.
331 removeDirectoryRecursive :: FilePath -> IO ()
332 removeDirectoryRecursive startLoc = do
333 cont <- getDirectoryContents startLoc
334 sequence_ [rm (startLoc `joinFileName` x) | x <- cont, x /= "." && x /= ".."]
335 removeDirectory startLoc
337 rm :: FilePath -> IO ()
338 rm f = do temp <- try (removeFile f)
340 Left e -> do isDir <- doesDirectoryExist f
341 -- If f is not a directory, re-throw the error
342 unless isDir $ ioError e
343 removeDirectoryRecursive f
346 #if __GLASGOW_HASKELL__
347 {- |'removeFile' /file/ removes the directory entry for an existing file
348 /file/, where /file/ is not itself a directory. The
349 implementation may specify additional constraints which must be
350 satisfied before a file can be removed (e.g. the file may not be in
351 use by other processes).
353 The operation may fail with:
356 A physical I\/O error has occurred.
360 The operand is not a valid file name.
361 @[ENAMETOOLONG, ELOOP]@
363 * 'isDoesNotExistError' \/ 'NoSuchThing'
364 The file does not exist.
367 * 'isPermissionError' \/ 'PermissionDenied'
368 The process has insufficient privileges to perform the operation.
369 @[EROFS, EACCES, EPERM]@
371 * 'UnsatisfiedConstraints'
372 Implementation-dependent constraints are not satisfied.
375 * 'InappropriateType'
376 The operand refers to an existing directory.
381 removeFile :: FilePath -> IO ()
383 modifyIOError (`ioeSetFileName` path) $
384 withCString path $ \s ->
385 throwErrnoIfMinus1Retry_ "removeFile" (c_unlink s)
387 {- |@'renameDirectory' old new@ changes the name of an existing
388 directory from /old/ to /new/. If the /new/ directory
389 already exists, it is atomically replaced by the /old/ directory.
390 If the /new/ directory is neither the /old/ directory nor an
391 alias of the /old/ directory, it is removed as if by
392 'removeDirectory'. A conformant implementation need not support
393 renaming directories in all situations (e.g. renaming to an existing
394 directory, or across different physical devices), but the constraints
397 On Win32 platforms, @renameDirectory@ fails if the /new/ directory already
400 The operation may fail with:
403 A physical I\/O error has occurred.
407 Either operand is not a valid directory name.
408 @[ENAMETOOLONG, ELOOP]@
410 * 'isDoesNotExistError' \/ 'NoSuchThing'
411 The original directory does not exist, or there is no path to the target.
414 * 'isPermissionError' \/ 'PermissionDenied'
415 The process has insufficient privileges to perform the operation.
416 @[EROFS, EACCES, EPERM]@
418 * 'ResourceExhausted'
419 Insufficient resources are available to perform the operation.
420 @[EDQUOT, ENOSPC, ENOMEM, EMLINK]@
422 * 'UnsatisfiedConstraints'
423 Implementation-dependent constraints are not satisfied.
424 @[EBUSY, ENOTEMPTY, EEXIST]@
426 * 'UnsupportedOperation'
427 The implementation does not support renaming in this situation.
430 * 'InappropriateType'
431 Either path refers to an existing non-directory object.
436 renameDirectory :: FilePath -> FilePath -> IO ()
437 renameDirectory opath npath =
438 withFileStatus "renameDirectory" opath $ \st -> do
439 is_dir <- isDirectory st
441 then ioException (IOError Nothing InappropriateType "renameDirectory"
442 ("not a directory") (Just opath))
445 withCString opath $ \s1 ->
446 withCString npath $ \s2 ->
447 throwErrnoIfMinus1Retry_ "renameDirectory" (c_rename s1 s2)
449 {- |@'renameFile' old new@ changes the name of an existing file system
450 object from /old/ to /new/. If the /new/ object already
451 exists, it is atomically replaced by the /old/ object. Neither
452 path may refer to an existing directory. A conformant implementation
453 need not support renaming files in all situations (e.g. renaming
454 across different physical devices), but the constraints must be
457 The operation may fail with:
460 A physical I\/O error has occurred.
464 Either operand is not a valid file name.
465 @[ENAMETOOLONG, ELOOP]@
467 * 'isDoesNotExistError' \/ 'NoSuchThing'
468 The original file does not exist, or there is no path to the target.
471 * 'isPermissionError' \/ 'PermissionDenied'
472 The process has insufficient privileges to perform the operation.
473 @[EROFS, EACCES, EPERM]@
475 * 'ResourceExhausted'
476 Insufficient resources are available to perform the operation.
477 @[EDQUOT, ENOSPC, ENOMEM, EMLINK]@
479 * 'UnsatisfiedConstraints'
480 Implementation-dependent constraints are not satisfied.
483 * 'UnsupportedOperation'
484 The implementation does not support renaming in this situation.
487 * 'InappropriateType'
488 Either path refers to an existing directory.
489 @[ENOTDIR, EISDIR, EINVAL, EEXIST, ENOTEMPTY]@
493 renameFile :: FilePath -> FilePath -> IO ()
494 renameFile opath npath =
495 withFileOrSymlinkStatus "renameFile" opath $ \st -> do
496 is_dir <- isDirectory st
498 then ioException (IOError Nothing InappropriateType "renameFile"
499 "is a directory" (Just opath))
502 withCString opath $ \s1 ->
503 withCString npath $ \s2 ->
504 throwErrnoIfMinus1Retry_ "renameFile" (c_rename s1 s2)
506 #endif /* __GLASGOW_HASKELL__ */
508 {- |@'copyFile' old new@ copies the existing file from /old/ to /new/.
509 If the /new/ file already exists, it is atomically replaced by the /old/ file.
510 Neither path may refer to an existing directory.
512 copyFile :: FilePath -> FilePath -> IO ()
513 copyFile fromFPath toFPath = do
514 -- We try removing the target file before opening it for
515 -- writing. In the event that the target file is locked or in
516 -- use, this allows us to replace it safely. However, it
517 -- leaves a race condition: someone else might create the file
518 -- after we delete it, but there isn't much we can do about
520 #if (!(defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ > 600))
521 contents <- readFile fromFPath
522 try (removeFile toFPath)
523 writeFile toFPath contents
524 try (copyPermissions fromFPath toFPath)
527 (bracket (openBinaryFile fromFPath ReadMode) hClose $ \hFrom -> do
528 try (removeFile toFPath)
529 bracket (openBinaryFile toFPath WriteMode) hClose $ \hTo -> do
530 allocaBytes bufferSize $ \buffer -> do
531 copyContents hFrom hTo buffer
532 try (copyPermissions fromFPath toFPath)
533 return ()) `catch` (ioError . changeFunName)
537 changeFunName (IOError h iot fun str mb_fp) = IOError h iot "copyFile" str mb_fp
539 copyContents hFrom hTo buffer = do
540 count <- hGetBuf hFrom buffer bufferSize
541 when (count > 0) $ do
542 hPutBuf hTo buffer count
543 copyContents hFrom hTo buffer
546 #ifdef __GLASGOW_HASKELL__
547 -- | Given path referring to a file or directory, returns a
548 -- canonicalized path, with the intent that two paths referring
549 -- to the same file\/directory will map to the same canonicalized
550 -- path. Note that it is impossible to guarantee that the
551 -- implication (same file\/dir \<=\> same canonicalizedPath) holds
552 -- in either direction: this function can make only a best-effort
554 canonicalizePath :: FilePath -> IO FilePath
555 canonicalizePath fpath =
556 withCString fpath $ \pInPath ->
557 allocaBytes long_path_size $ \pOutPath ->
558 #if defined(mingw32_HOST_OS)
559 alloca $ \ppFilePart ->
560 do c_GetFullPathName pInPath (fromIntegral long_path_size) pOutPath ppFilePart
562 do c_realpath pInPath pOutPath
566 #if defined(mingw32_HOST_OS)
567 foreign import stdcall unsafe "GetFullPathNameA"
568 c_GetFullPathName :: CString
574 foreign import ccall unsafe "realpath"
575 c_realpath :: CString
579 #else /* !__GLASGOW_HASKELL__ */
580 -- dummy implementation
581 canonicalizePath :: FilePath -> IO FilePath
582 canonicalizePath fpath = return fpath
583 #endif /* !__GLASGOW_HASKELL__ */
585 -- | Given an executable file name, searches for such file
586 -- in the directories listed in system PATH. The returned value
587 -- is the path to the found executable or Nothing if there isn't
588 -- such executable. For example (findExecutable \"ghc\")
589 -- gives you the path to GHC.
590 findExecutable :: String -> IO (Maybe FilePath)
591 findExecutable binary =
592 #if defined(mingw32_HOST_OS)
593 withCString binary $ \c_binary ->
594 withCString ('.':exeExtension) $ \c_ext ->
595 allocaBytes long_path_size $ \pOutPath ->
596 alloca $ \ppFilePart -> do
597 res <- c_SearchPath nullPtr c_binary c_ext (fromIntegral long_path_size) pOutPath ppFilePart
598 if res > 0 && res < fromIntegral long_path_size
599 then do fpath <- peekCString pOutPath
603 foreign import stdcall unsafe "SearchPathA"
604 c_SearchPath :: CString
611 # if !defined(__GLASGOW_HASKELL__)
612 long_path_size :: Int
613 long_path_size = 4096
617 path <- getEnv "PATH"
618 search (parseSearchPath path)
620 fileName = binary `joinFileExt` exeExtension
622 search :: [FilePath] -> IO (Maybe FilePath)
623 search [] = return Nothing
625 let path = d `joinFileName` fileName
626 b <- doesFileExist path
627 if b then return (Just path)
632 #ifdef __GLASGOW_HASKELL__
633 {- |@'getDirectoryContents' dir@ returns a list of /all/ entries
636 The operation may fail with:
639 A physical I\/O error has occurred.
643 The operand is not a valid directory name.
644 @[ENAMETOOLONG, ELOOP]@
646 * 'isDoesNotExistError' \/ 'NoSuchThing'
647 The directory does not exist.
650 * 'isPermissionError' \/ 'PermissionDenied'
651 The process has insufficient privileges to perform the operation.
654 * 'ResourceExhausted'
655 Insufficient resources are available to perform the operation.
658 * 'InappropriateType'
659 The path refers to an existing non-directory object.
664 getDirectoryContents :: FilePath -> IO [FilePath]
665 getDirectoryContents path = do
666 modifyIOError (`ioeSetFileName` path) $
667 alloca $ \ ptr_dEnt ->
669 (withCString path $ \s ->
670 throwErrnoIfNullRetry desc (c_opendir s))
671 (\p -> throwErrnoIfMinus1_ desc (c_closedir p))
672 (\p -> loop ptr_dEnt p)
674 desc = "getDirectoryContents"
676 loop :: Ptr (Ptr CDirent) -> Ptr CDir -> IO [String]
677 loop ptr_dEnt dir = do
679 r <- readdir dir ptr_dEnt
682 dEnt <- peek ptr_dEnt
686 entry <- (d_name dEnt >>= peekCString)
688 entries <- loop ptr_dEnt dir
689 return (entry:entries)
690 else do errno <- getErrno
691 if (errno == eINTR) then loop ptr_dEnt dir else do
692 let (Errno eo) = errno
693 if (eo == end_of_dir)
699 {- |If the operating system has a notion of current directories,
700 'getCurrentDirectory' returns an absolute path to the
701 current directory of the calling process.
703 The operation may fail with:
706 A physical I\/O error has occurred.
709 * 'isDoesNotExistError' \/ 'NoSuchThing'
710 There is no path referring to the current directory.
711 @[EPERM, ENOENT, ESTALE...]@
713 * 'isPermissionError' \/ 'PermissionDenied'
714 The process has insufficient privileges to perform the operation.
717 * 'ResourceExhausted'
718 Insufficient resources are available to perform the operation.
720 * 'UnsupportedOperation'
721 The operating system has no notion of current directory.
725 getCurrentDirectory :: IO FilePath
726 getCurrentDirectory = do
727 p <- mallocBytes long_path_size
729 where go p bytes = do
730 p' <- c_getcwd p (fromIntegral bytes)
732 then do s <- peekCString p'
735 else do errno <- getErrno
737 then do let bytes' = bytes * 2
738 p' <- reallocBytes p bytes'
740 else throwErrno "getCurrentDirectory"
742 {- |If the operating system has a notion of current directories,
743 @'setCurrentDirectory' dir@ changes the current
744 directory of the calling process to /dir/.
746 The operation may fail with:
749 A physical I\/O error has occurred.
753 The operand is not a valid directory name.
754 @[ENAMETOOLONG, ELOOP]@
756 * 'isDoesNotExistError' \/ 'NoSuchThing'
757 The directory does not exist.
760 * 'isPermissionError' \/ 'PermissionDenied'
761 The process has insufficient privileges to perform the operation.
764 * 'UnsupportedOperation'
765 The operating system has no notion of current directory, or the
766 current directory cannot be dynamically changed.
768 * 'InappropriateType'
769 The path refers to an existing non-directory object.
774 setCurrentDirectory :: FilePath -> IO ()
775 setCurrentDirectory path = do
776 modifyIOError (`ioeSetFileName` path) $
777 withCString path $ \s ->
778 throwErrnoIfMinus1Retry_ "setCurrentDirectory" (c_chdir s)
779 -- ToDo: add path to error
781 {- |The operation 'doesDirectoryExist' returns 'True' if the argument file
782 exists and is a directory, and 'False' otherwise.
785 doesDirectoryExist :: FilePath -> IO Bool
786 doesDirectoryExist name =
788 (withFileStatus "doesDirectoryExist" name $ \st -> isDirectory st)
789 (\ _ -> return False)
791 {- |The operation 'doesFileExist' returns 'True'
792 if the argument file exists and is not a directory, and 'False' otherwise.
795 doesFileExist :: FilePath -> IO Bool
796 doesFileExist name = do
798 (withFileStatus "doesFileExist" name $ \st -> do b <- isDirectory st; return (not b))
799 (\ _ -> return False)
801 {- |The 'getModificationTime' operation returns the
802 clock time at which the file or directory was last modified.
804 The operation may fail with:
806 * 'isPermissionError' if the user is not permitted to access
807 the modification time; or
809 * 'isDoesNotExistError' if the file or directory does not exist.
813 getModificationTime :: FilePath -> IO ClockTime
814 getModificationTime name =
815 withFileStatus "getModificationTime" name $ \ st ->
818 withFileStatus :: String -> FilePath -> (Ptr CStat -> IO a) -> IO a
819 withFileStatus loc name f = do
820 modifyIOError (`ioeSetFileName` name) $
821 allocaBytes sizeof_stat $ \p ->
822 withCString (fileNameEndClean name) $ \s -> do
823 throwErrnoIfMinus1Retry_ loc (c_stat s p)
826 withFileOrSymlinkStatus :: String -> FilePath -> (Ptr CStat -> IO a) -> IO a
827 withFileOrSymlinkStatus loc name f = do
828 modifyIOError (`ioeSetFileName` name) $
829 allocaBytes sizeof_stat $ \p ->
830 withCString name $ \s -> do
831 throwErrnoIfMinus1Retry_ loc (lstat s p)
834 modificationTime :: Ptr CStat -> IO ClockTime
835 modificationTime stat = do
836 mtime <- st_mtime stat
837 let realToInteger = round . realToFrac :: Real a => a -> Integer
838 return (TOD (realToInteger (mtime :: CTime)) 0)
840 isDirectory :: Ptr CStat -> IO Bool
841 isDirectory stat = do
843 return (s_isdir mode)
845 fileNameEndClean :: String -> String
846 fileNameEndClean name =
847 if i > 0 && (ec == '\\' || ec == '/') then
848 fileNameEndClean (take i name)
852 i = (length name) - 1
855 foreign import ccall unsafe "__hscore_long_path_size"
856 long_path_size :: Int
858 foreign import ccall unsafe "__hscore_R_OK" r_OK :: CMode
859 foreign import ccall unsafe "__hscore_W_OK" w_OK :: CMode
860 foreign import ccall unsafe "__hscore_X_OK" x_OK :: CMode
862 foreign import ccall unsafe "__hscore_S_IRUSR" s_IRUSR :: CMode
863 foreign import ccall unsafe "__hscore_S_IWUSR" s_IWUSR :: CMode
864 foreign import ccall unsafe "__hscore_S_IXUSR" s_IXUSR :: CMode
866 #endif /* __GLASGOW_HASKELL__ */
868 {- | Returns the current user's home directory.
870 The directory returned is expected to be writable by the current user,
871 but note that it isn't generally considered good practice to store
872 application-specific data here; use 'getAppUserDataDirectory'
875 On Unix, 'getHomeDirectory' returns the value of the @HOME@
876 environment variable. On Windows, the system is queried for a
877 suitable path; a typical path might be
878 @C:/Documents And Settings/user@.
880 The operation may fail with:
882 * 'UnsupportedOperation'
883 The operating system has no notion of home directory.
885 * 'isDoesNotExistError'
886 The home directory for the current user does not exist, or
889 getHomeDirectory :: IO FilePath
891 #if __GLASGOW_HASKELL__ && defined(mingw32_HOST_OS)
892 allocaBytes long_path_size $ \pPath -> do
893 r <- c_SHGetFolderPath nullPtr csidl_PROFILE nullPtr 0 pPath
896 r <- c_SHGetFolderPath nullPtr csidl_WINDOWS nullPtr 0 pPath
897 when (r < 0) (raiseUnsupported "System.Directory.getHomeDirectory")
904 {- | Returns the pathname of a directory in which application-specific
905 data for the current user can be stored. The result of
906 'getAppUserDataDirectory' for a given application is specific to
909 The argument should be the name of the application, which will be used
910 to construct the pathname (so avoid using unusual characters that
911 might result in an invalid pathname).
913 Note: the directory may not actually exist, and may need to be created
914 first. It is expected that the parent directory exists and is
917 On Unix, this function returns @$HOME\/.appName@. On Windows, a
918 typical path might be
920 > C:/Documents And Settings/user/Application Data/appName
922 The operation may fail with:
924 * 'UnsupportedOperation'
925 The operating system has no notion of application-specific data directory.
927 * 'isDoesNotExistError'
928 The home directory for the current user does not exist, or
931 getAppUserDataDirectory :: String -> IO FilePath
932 getAppUserDataDirectory appName = do
933 #if __GLASGOW_HASKELL__ && defined(mingw32_HOST_OS)
934 allocaBytes long_path_size $ \pPath -> do
935 r <- c_SHGetFolderPath nullPtr csidl_APPDATA nullPtr 0 pPath
936 when (r<0) (raiseUnsupported "System.Directory.getAppUserDataDirectory")
937 s <- peekCString pPath
938 return (s++'\\':appName)
940 path <- getEnv "HOME"
941 return (path++'/':'.':appName)
944 {- | Returns the current user's document directory.
946 The directory returned is expected to be writable by the current user,
947 but note that it isn't generally considered good practice to store
948 application-specific data here; use 'getAppUserDataDirectory'
951 On Unix, 'getUserDocumentsDirectory' returns the value of the @HOME@
952 environment variable. On Windows, the system is queried for a
953 suitable path; a typical path might be
954 @C:\/Documents and Settings\/user\/My Documents@.
956 The operation may fail with:
958 * 'UnsupportedOperation'
959 The operating system has no notion of document directory.
961 * 'isDoesNotExistError'
962 The document directory for the current user does not exist, or
965 getUserDocumentsDirectory :: IO FilePath
966 getUserDocumentsDirectory = do
967 #if __GLASGOW_HASKELL__ && defined(mingw32_HOST_OS)
968 allocaBytes long_path_size $ \pPath -> do
969 r <- c_SHGetFolderPath nullPtr csidl_PERSONAL nullPtr 0 pPath
970 when (r<0) (raiseUnsupported "System.Directory.getUserDocumentsDirectory")
976 {- | Returns the current directory for temporary files.
978 On Unix, 'getTemporaryDirectory' returns the value of the @TMPDIR@
979 environment variable or \"\/tmp\" if the variable isn\'t defined.
980 On Windows, the function checks for the existence of environment variables in
981 the following order and uses the first path found:
984 TMP environment variable.
987 TEMP environment variable.
990 USERPROFILE environment variable.
993 The Windows directory
995 The operation may fail with:
997 * 'UnsupportedOperation'
998 The operating system has no notion of temporary directory.
1000 The function doesn\'t verify whether the path exists.
1002 getTemporaryDirectory :: IO FilePath
1003 getTemporaryDirectory = do
1004 #if __GLASGOW_HASKELL__ && defined(mingw32_HOST_OS)
1005 allocaBytes long_path_size $ \pPath -> do
1006 r <- c_GetTempPath (fromIntegral long_path_size) pPath
1009 catch (getEnv "TMPDIR") (\ex -> return "/tmp")
1012 #if __GLASGOW_HASKELL__ && defined(mingw32_HOST_OS)
1013 foreign import ccall unsafe "__hscore_getFolderPath"
1014 c_SHGetFolderPath :: Ptr ()
1020 foreign import ccall unsafe "__hscore_CSIDL_PROFILE" csidl_PROFILE :: CInt
1021 foreign import ccall unsafe "__hscore_CSIDL_APPDATA" csidl_APPDATA :: CInt
1022 foreign import ccall unsafe "__hscore_CSIDL_WINDOWS" csidl_WINDOWS :: CInt
1023 foreign import ccall unsafe "__hscore_CSIDL_PERSONAL" csidl_PERSONAL :: CInt
1025 foreign import stdcall unsafe "GetTempPathA" c_GetTempPath :: CInt -> CString -> IO CInt
1027 raiseUnsupported loc =
1028 ioException (IOError Nothing UnsupportedOperation loc "unsupported operation" Nothing)