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 )
85 {-# CFILES cbits/PrelIOUtils.c #-}
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. The permissions of /old/ are
511 copied to /new/, if possible.
516 It's tempting to try to remove the target file before opening it for
517 writing. This could be useful: for example if the target file is an
518 executable that is in use, writing will fail, but unlinking first
521 However, it certainly isn't always what you want.
523 * if the target file is hardlinked, removing it would break
524 the hard link, but just opening would preserve it.
526 * opening and truncating will preserve permissions and
529 * If the destination file is read-only in a writable directory,
530 we might want copyFile to fail. Removing the target first
531 would succeed, however.
533 * If the destination file is special (eg. /dev/null), removing
534 it is probably not the right thing. Copying to /dev/null
535 should leave /dev/null intact, not replace it with a plain
538 * There's a small race condition between removing the target and
539 opening it for writing during which time someone might
542 copyFile :: FilePath -> FilePath -> IO ()
543 copyFile fromFPath toFPath =
544 #if (!(defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ > 600))
545 do readFile fromFPath >>= writeFile toFPath
546 try (copyPermissions fromFPath toFPath)
549 (bracket (openBinaryFile fromFPath ReadMode) hClose $ \hFrom ->
550 bracket (openBinaryFile toFPath WriteMode) hClose $ \hTo ->
551 allocaBytes bufferSize $ \buffer -> do
552 copyContents hFrom hTo buffer
553 try (copyPermissions fromFPath toFPath)
554 return ()) `catch` (ioError . changeFunName)
558 changeFunName (IOError h iot fun str mb_fp) = IOError h iot "copyFile" str mb_fp
560 copyContents hFrom hTo buffer = do
561 count <- hGetBuf hFrom buffer bufferSize
562 when (count > 0) $ do
563 hPutBuf hTo buffer count
564 copyContents hFrom hTo buffer
567 -- | Given path referring to a file or directory, returns a
568 -- canonicalized path, with the intent that two paths referring
569 -- to the same file\/directory will map to the same canonicalized
570 -- path. Note that it is impossible to guarantee that the
571 -- implication (same file\/dir \<=\> same canonicalizedPath) holds
572 -- in either direction: this function can make only a best-effort
574 canonicalizePath :: FilePath -> IO FilePath
575 canonicalizePath fpath =
576 withCString fpath $ \pInPath ->
577 allocaBytes long_path_size $ \pOutPath ->
578 #if defined(mingw32_HOST_OS)
579 alloca $ \ppFilePart ->
580 do c_GetFullPathName pInPath (fromIntegral long_path_size) pOutPath ppFilePart
582 do c_realpath pInPath pOutPath
586 #if defined(mingw32_HOST_OS)
587 foreign import stdcall unsafe "GetFullPathNameA"
588 c_GetFullPathName :: CString
594 foreign import ccall unsafe "realpath"
595 c_realpath :: CString
600 -- | Given an executable file name, searches for such file
601 -- in the directories listed in system PATH. The returned value
602 -- is the path to the found executable or Nothing if there isn't
603 -- such executable. For example (findExecutable \"ghc\")
604 -- gives you the path to GHC.
605 findExecutable :: String -> IO (Maybe FilePath)
606 findExecutable binary =
607 #if defined(mingw32_HOST_OS)
608 withCString binary $ \c_binary ->
609 withCString ('.':exeExtension) $ \c_ext ->
610 allocaBytes long_path_size $ \pOutPath ->
611 alloca $ \ppFilePart -> do
612 res <- c_SearchPath nullPtr c_binary c_ext (fromIntegral long_path_size) pOutPath ppFilePart
613 if res > 0 && res < fromIntegral long_path_size
614 then do fpath <- peekCString pOutPath
618 foreign import stdcall unsafe "SearchPathA"
619 c_SearchPath :: CString
628 path <- getEnv "PATH"
629 search (parseSearchPath path)
631 fileName = binary `joinFileExt` exeExtension
633 search :: [FilePath] -> IO (Maybe FilePath)
634 search [] = return Nothing
636 let path = d `joinFileName` fileName
637 b <- doesFileExist path
638 if b then return (Just path)
643 #ifdef __GLASGOW_HASKELL__
644 {- |@'getDirectoryContents' dir@ returns a list of /all/ entries
647 The operation may fail with:
650 A physical I\/O error has occurred.
654 The operand is not a valid directory name.
655 @[ENAMETOOLONG, ELOOP]@
657 * 'isDoesNotExistError' \/ 'NoSuchThing'
658 The directory does not exist.
661 * 'isPermissionError' \/ 'PermissionDenied'
662 The process has insufficient privileges to perform the operation.
665 * 'ResourceExhausted'
666 Insufficient resources are available to perform the operation.
669 * 'InappropriateType'
670 The path refers to an existing non-directory object.
675 getDirectoryContents :: FilePath -> IO [FilePath]
676 getDirectoryContents path = do
677 modifyIOError (`ioeSetFileName` path) $
678 alloca $ \ ptr_dEnt ->
680 (withCString path $ \s ->
681 throwErrnoIfNullRetry desc (c_opendir s))
682 (\p -> throwErrnoIfMinus1_ desc (c_closedir p))
683 (\p -> loop ptr_dEnt p)
685 desc = "getDirectoryContents"
687 loop :: Ptr (Ptr CDirent) -> Ptr CDir -> IO [String]
688 loop ptr_dEnt dir = do
690 r <- readdir dir ptr_dEnt
693 dEnt <- peek ptr_dEnt
697 entry <- (d_name dEnt >>= peekCString)
699 entries <- loop ptr_dEnt dir
700 return (entry:entries)
701 else do errno <- getErrno
702 if (errno == eINTR) then loop ptr_dEnt dir else do
703 let (Errno eo) = errno
704 if (eo == end_of_dir)
710 {- |If the operating system has a notion of current directories,
711 'getCurrentDirectory' returns an absolute path to the
712 current directory of the calling process.
714 The operation may fail with:
717 A physical I\/O error has occurred.
720 * 'isDoesNotExistError' \/ 'NoSuchThing'
721 There is no path referring to the current directory.
722 @[EPERM, ENOENT, ESTALE...]@
724 * 'isPermissionError' \/ 'PermissionDenied'
725 The process has insufficient privileges to perform the operation.
728 * 'ResourceExhausted'
729 Insufficient resources are available to perform the operation.
731 * 'UnsupportedOperation'
732 The operating system has no notion of current directory.
736 getCurrentDirectory :: IO FilePath
737 getCurrentDirectory = do
738 p <- mallocBytes long_path_size
740 where go p bytes = do
741 p' <- c_getcwd p (fromIntegral bytes)
743 then do s <- peekCString p'
746 else do errno <- getErrno
748 then do let bytes' = bytes * 2
749 p' <- reallocBytes p bytes'
751 else throwErrno "getCurrentDirectory"
753 {- |If the operating system has a notion of current directories,
754 @'setCurrentDirectory' dir@ changes the current
755 directory of the calling process to /dir/.
757 The operation may fail with:
760 A physical I\/O error has occurred.
764 The operand is not a valid directory name.
765 @[ENAMETOOLONG, ELOOP]@
767 * 'isDoesNotExistError' \/ 'NoSuchThing'
768 The directory does not exist.
771 * 'isPermissionError' \/ 'PermissionDenied'
772 The process has insufficient privileges to perform the operation.
775 * 'UnsupportedOperation'
776 The operating system has no notion of current directory, or the
777 current directory cannot be dynamically changed.
779 * 'InappropriateType'
780 The path refers to an existing non-directory object.
785 setCurrentDirectory :: FilePath -> IO ()
786 setCurrentDirectory path = do
787 modifyIOError (`ioeSetFileName` path) $
788 withCString path $ \s ->
789 throwErrnoIfMinus1Retry_ "setCurrentDirectory" (c_chdir s)
790 -- ToDo: add path to error
792 {- |The operation 'doesDirectoryExist' returns 'True' if the argument file
793 exists and is a directory, and 'False' otherwise.
796 doesDirectoryExist :: FilePath -> IO Bool
797 doesDirectoryExist name =
799 (withFileStatus "doesDirectoryExist" name $ \st -> isDirectory st)
800 (\ _ -> return False)
802 {- |The operation 'doesFileExist' returns 'True'
803 if the argument file exists and is not a directory, and 'False' otherwise.
806 doesFileExist :: FilePath -> IO Bool
807 doesFileExist name = do
809 (withFileStatus "doesFileExist" name $ \st -> do b <- isDirectory st; return (not b))
810 (\ _ -> return False)
812 {- |The 'getModificationTime' operation returns the
813 clock time at which the file or directory was last modified.
815 The operation may fail with:
817 * 'isPermissionError' if the user is not permitted to access
818 the modification time; or
820 * 'isDoesNotExistError' if the file or directory does not exist.
824 getModificationTime :: FilePath -> IO ClockTime
825 getModificationTime name =
826 withFileStatus "getModificationTime" name $ \ st ->
829 withFileStatus :: String -> FilePath -> (Ptr CStat -> IO a) -> IO a
830 withFileStatus loc name f = do
831 modifyIOError (`ioeSetFileName` name) $
832 allocaBytes sizeof_stat $ \p ->
833 withCString (fileNameEndClean name) $ \s -> do
834 throwErrnoIfMinus1Retry_ loc (c_stat s p)
837 withFileOrSymlinkStatus :: String -> FilePath -> (Ptr CStat -> IO a) -> IO a
838 withFileOrSymlinkStatus loc name f = do
839 modifyIOError (`ioeSetFileName` name) $
840 allocaBytes sizeof_stat $ \p ->
841 withCString name $ \s -> do
842 throwErrnoIfMinus1Retry_ loc (lstat s p)
845 modificationTime :: Ptr CStat -> IO ClockTime
846 modificationTime stat = do
847 mtime <- st_mtime stat
848 let realToInteger = round . realToFrac :: Real a => a -> Integer
849 return (TOD (realToInteger (mtime :: CTime)) 0)
851 isDirectory :: Ptr CStat -> IO Bool
852 isDirectory stat = do
854 return (s_isdir mode)
856 fileNameEndClean :: String -> String
857 fileNameEndClean name =
858 if i > 0 && (ec == '\\' || ec == '/') then
859 fileNameEndClean (take i name)
863 i = (length name) - 1
866 foreign import ccall unsafe "__hscore_R_OK" r_OK :: CMode
867 foreign import ccall unsafe "__hscore_W_OK" w_OK :: CMode
868 foreign import ccall unsafe "__hscore_X_OK" x_OK :: CMode
870 foreign import ccall unsafe "__hscore_S_IRUSR" s_IRUSR :: CMode
871 foreign import ccall unsafe "__hscore_S_IWUSR" s_IWUSR :: CMode
872 foreign import ccall unsafe "__hscore_S_IXUSR" s_IXUSR :: CMode
874 #endif /* __GLASGOW_HASKELL__ */
876 foreign import ccall unsafe "__hscore_long_path_size"
877 long_path_size :: Int
879 {- | Returns the current user's home directory.
881 The directory returned is expected to be writable by the current user,
882 but note that it isn't generally considered good practice to store
883 application-specific data here; use 'getAppUserDataDirectory'
886 On Unix, 'getHomeDirectory' returns the value of the @HOME@
887 environment variable. On Windows, the system is queried for a
888 suitable path; a typical path might be
889 @C:/Documents And Settings/user@.
891 The operation may fail with:
893 * 'UnsupportedOperation'
894 The operating system has no notion of home directory.
896 * 'isDoesNotExistError'
897 The home directory for the current user does not exist, or
900 getHomeDirectory :: IO FilePath
902 #if defined(mingw32_HOST_OS)
903 allocaBytes long_path_size $ \pPath -> do
904 r <- c_SHGetFolderPath nullPtr csidl_PROFILE nullPtr 0 pPath
907 r <- c_SHGetFolderPath nullPtr csidl_WINDOWS nullPtr 0 pPath
908 when (r < 0) (raiseUnsupported "System.Directory.getHomeDirectory")
915 {- | Returns the pathname of a directory in which application-specific
916 data for the current user can be stored. The result of
917 'getAppUserDataDirectory' for a given application is specific to
920 The argument should be the name of the application, which will be used
921 to construct the pathname (so avoid using unusual characters that
922 might result in an invalid pathname).
924 Note: the directory may not actually exist, and may need to be created
925 first. It is expected that the parent directory exists and is
928 On Unix, this function returns @$HOME\/.appName@. On Windows, a
929 typical path might be
931 > C:/Documents And Settings/user/Application Data/appName
933 The operation may fail with:
935 * 'UnsupportedOperation'
936 The operating system has no notion of application-specific data directory.
938 * 'isDoesNotExistError'
939 The home directory for the current user does not exist, or
942 getAppUserDataDirectory :: String -> IO FilePath
943 getAppUserDataDirectory appName = do
944 #if defined(mingw32_HOST_OS)
945 allocaBytes long_path_size $ \pPath -> do
946 r <- c_SHGetFolderPath nullPtr csidl_APPDATA nullPtr 0 pPath
947 when (r<0) (raiseUnsupported "System.Directory.getAppUserDataDirectory")
948 s <- peekCString pPath
949 return (s++'\\':appName)
951 path <- getEnv "HOME"
952 return (path++'/':'.':appName)
955 {- | Returns the current user's document directory.
957 The directory returned is expected to be writable by the current user,
958 but note that it isn't generally considered good practice to store
959 application-specific data here; use 'getAppUserDataDirectory'
962 On Unix, 'getUserDocumentsDirectory' returns the value of the @HOME@
963 environment variable. On Windows, the system is queried for a
964 suitable path; a typical path might be
965 @C:\/Documents and Settings\/user\/My Documents@.
967 The operation may fail with:
969 * 'UnsupportedOperation'
970 The operating system has no notion of document directory.
972 * 'isDoesNotExistError'
973 The document directory for the current user does not exist, or
976 getUserDocumentsDirectory :: IO FilePath
977 getUserDocumentsDirectory = do
978 #if defined(mingw32_HOST_OS)
979 allocaBytes long_path_size $ \pPath -> do
980 r <- c_SHGetFolderPath nullPtr csidl_PERSONAL nullPtr 0 pPath
981 when (r<0) (raiseUnsupported "System.Directory.getUserDocumentsDirectory")
987 {- | Returns the current directory for temporary files.
989 On Unix, 'getTemporaryDirectory' returns the value of the @TMPDIR@
990 environment variable or \"\/tmp\" if the variable isn\'t defined.
991 On Windows, the function checks for the existence of environment variables in
992 the following order and uses the first path found:
995 TMP environment variable.
998 TEMP environment variable.
1001 USERPROFILE environment variable.
1004 The Windows directory
1006 The operation may fail with:
1008 * 'UnsupportedOperation'
1009 The operating system has no notion of temporary directory.
1011 The function doesn\'t verify whether the path exists.
1013 getTemporaryDirectory :: IO FilePath
1014 getTemporaryDirectory = do
1015 #if defined(mingw32_HOST_OS)
1016 allocaBytes long_path_size $ \pPath -> do
1017 r <- c_GetTempPath (fromIntegral long_path_size) pPath
1020 catch (getEnv "TMPDIR") (\ex -> return "/tmp")
1023 #if defined(mingw32_HOST_OS)
1024 foreign import ccall unsafe "__hscore_getFolderPath"
1025 c_SHGetFolderPath :: Ptr ()
1031 foreign import ccall unsafe "__hscore_CSIDL_PROFILE" csidl_PROFILE :: CInt
1032 foreign import ccall unsafe "__hscore_CSIDL_APPDATA" csidl_APPDATA :: CInt
1033 foreign import ccall unsafe "__hscore_CSIDL_WINDOWS" csidl_WINDOWS :: CInt
1034 foreign import ccall unsafe "__hscore_CSIDL_PERSONAL" csidl_PERSONAL :: CInt
1036 foreign import stdcall unsafe "GetTempPathA" c_GetTempPath :: CInt -> CString -> IO CInt
1038 raiseUnsupported loc =
1039 ioException (IOError Nothing UnsupportedOperation loc "unsupported operation" Nothing)