{-# LINE 1 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
{-# LANGUAGE CApiFFI #-}

-----------------------------------------------------------------------------
-- |
-- Module      :  System.Posix.Files.PosixString
-- Copyright   :  (c) The University of Glasgow 2002
-- License     :  BSD-style (see the file libraries/base/LICENSE)
--
-- Maintainer  :  libraries@haskell.org
-- Stability   :  provisional
-- Portability :  non-portable (requires POSIX)
--
-- Functions defined by the POSIX standards for manipulating and querying the
-- file system. Names of underlying POSIX functions are indicated whenever
-- possible. A more complete documentation of the POSIX functions together
-- with a more detailed description of different error conditions are usually
-- available in the system's manual pages or from
-- <http://www.unix.org/version3/online.html> (free registration required).
--
-- When a function that calls an underlying POSIX function fails, the errno
-- code is converted to an 'IOError' using 'Foreign.C.Error.errnoToIOError'.
-- For a list of which errno codes may be generated, consult the POSIX
-- documentation for the underlying function.
--
-----------------------------------------------------------------------------



module System.Posix.Files.PosixString (
    -- * File modes
    -- FileMode exported by System.Posix.Types
    unionFileModes, intersectFileModes,
    nullFileMode,
    ownerReadMode, ownerWriteMode, ownerExecuteMode, ownerModes,
    groupReadMode, groupWriteMode, groupExecuteMode, groupModes,
    otherReadMode, otherWriteMode, otherExecuteMode, otherModes,
    setUserIDMode, setGroupIDMode,
    stdFileMode,   accessModes,
    fileTypeModes,
    blockSpecialMode, characterSpecialMode, namedPipeMode, regularFileMode,
    directoryMode, symbolicLinkMode, socketMode,

    -- ** Setting file modes
    setFileMode, setFdMode, setFileCreationMask,

    -- ** Checking file existence and permissions
    fileAccess, fileExist,

    -- * File status
    FileStatus,
    -- ** Obtaining file status
    getFileStatus, getFdStatus, getSymbolicLinkStatus,
    -- ** Querying file status
    deviceID, fileID, fileMode, linkCount, fileOwner, fileGroup,
    specialDeviceID, fileSize, accessTime, modificationTime,
    statusChangeTime,
    accessTimeHiRes, modificationTimeHiRes, statusChangeTimeHiRes,
    isBlockDevice, isCharacterDevice, isNamedPipe, isRegularFile,
    isDirectory, isSymbolicLink, isSocket,

    -- * Creation
    createNamedPipe,
    createDevice,

    -- * Hard links
    createLink, removeLink,

    -- * Symbolic links
    createSymbolicLink, readSymbolicLink,

    -- * Renaming files
    rename,

    -- * Changing file ownership
    setOwnerAndGroup,  setFdOwnerAndGroup,

{-# LINE 77 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
    setSymbolicLinkOwnerAndGroup,

{-# LINE 79 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}

    -- * Changing file timestamps
    setFileTimes, setFileTimesHiRes,
    setSymbolicLinkTimesHiRes,
    touchFile, touchFd, touchSymbolicLink,

    -- * Setting file sizes
    setFileSize, setFdSize,

    -- * Find system-specific limits for a file
    PathVar(..), getPathVar, getFdPathVar,
  ) where

import System.Posix.Types
import System.Posix.Internals hiding (withFilePath, peekFilePathLen)
import qualified System.Posix.Files.Common as Common
import Foreign
import Foreign.C hiding (
     throwErrnoPath,
     throwErrnoPathIf,
     throwErrnoPathIf_,
     throwErrnoPathIfNull,
     throwErrnoPathIfMinus1,
     throwErrnoPathIfMinus1_ )

import System.OsPath.Types
import System.Posix.Files hiding (getFileStatus, getSymbolicLinkStatus, createNamedPipe, createDevice, createLink, removeLink, createSymbolicLink, readSymbolicLink, rename, setOwnerAndGroup, setSymbolicLinkOwnerAndGroup, setFileTimes, setSymbolicLinkTimesHiRes, touchFile, touchSymbolicLink, setFileSize, getPathVar, setFileMode, fileAccess, fileExist, setFdTimesHiRes, setFileTimesHiRes)
import System.Posix.PosixPath.FilePath

import Data.Time.Clock.POSIX (POSIXTime)


{-# LINE 114 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}

-- -----------------------------------------------------------------------------
-- chmod()

-- | @setFileMode path mode@ changes permission of the file given by @path@
-- to @mode@. This operation may fail with 'throwErrnoPathIfMinus1_' if @path@
-- doesn't exist or if the effective user ID of the current process is not that
-- of the file's owner.
--
-- Note: calls @chmod@.
setFileMode :: PosixPath -> FileMode -> IO ()
setFileMode :: PosixPath -> CMode -> IO ()
setFileMode PosixPath
name CMode
m =
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s -> do
    String -> PosixPath -> IO CInt -> IO ()
forall a. (Eq a, Num a) => String -> PosixPath -> IO a -> IO ()
throwErrnoPathIfMinus1_ String
"setFileMode" PosixPath
name (CString -> CMode -> IO CInt
c_chmod CString
s CMode
m)


-- -----------------------------------------------------------------------------
-- access()

-- | @fileAccess name read write exec@ checks if the file (or other file system
-- object) @name@ can be accessed for reading, writing and\/or executing. To
-- check a permission set the corresponding argument to 'True'.
--
-- Note: calls @access@.
fileAccess :: PosixPath -> Bool -> Bool -> Bool -> IO Bool
fileAccess :: PosixPath -> Bool -> Bool -> Bool -> IO Bool
fileAccess PosixPath
name Bool
readOK Bool
writeOK Bool
execOK = PosixPath -> CMode -> IO Bool
access PosixPath
name CMode
flags
  where
   flags :: CMode
flags   = CMode
read_f CMode -> CMode -> CMode
forall a. Bits a => a -> a -> a
.|. CMode
write_f CMode -> CMode -> CMode
forall a. Bits a => a -> a -> a
.|. CMode
exec_f
   read_f :: CMode
read_f  = if Bool
readOK  then (CMode
4) else CMode
0
{-# LINE 143 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
   write_f = if writeOK then (2) else 0
{-# LINE 144 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
   exec_f  = if execOK  then (1) else 0
{-# LINE 145 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}

-- | Checks for the existence of the file.
--
-- Note: calls @access@.
fileExist :: PosixPath -> IO Bool
fileExist :: PosixPath -> IO Bool
fileExist PosixPath
name =
  PosixPath -> (CString -> IO Bool) -> IO Bool
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name ((CString -> IO Bool) -> IO Bool)
-> (CString -> IO Bool) -> IO Bool
forall a b. (a -> b) -> a -> b
$ \CString
s -> do
    CInt
r <- CString -> CInt -> IO CInt
c_access CString
s (CInt
0)
{-# LINE 153 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
    if (r == 0)
        then return True
        else do err <- getErrno
                if (err == eNOENT)
                   then return False
                   else throwErrnoPath "fileExist" name

access :: PosixPath -> CMode -> IO Bool
access :: PosixPath -> CMode -> IO Bool
access PosixPath
name CMode
flags =
  PosixPath -> (CString -> IO Bool) -> IO Bool
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name ((CString -> IO Bool) -> IO Bool)
-> (CString -> IO Bool) -> IO Bool
forall a b. (a -> b) -> a -> b
$ \CString
s -> do
    CInt
r <- CString -> CInt -> IO CInt
c_access CString
s (CMode -> CInt
forall a b. (Integral a, Num b) => a -> b
fromIntegral CMode
flags)
    if (CInt
r CInt -> CInt -> Bool
forall a. Eq a => a -> a -> Bool
== CInt
0)
        then Bool -> IO Bool
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
True
        else do Errno
err <- IO Errno
getErrno
                if (Errno
err Errno -> Errno -> Bool
forall a. Eq a => a -> a -> Bool
== Errno
eACCES Bool -> Bool -> Bool
|| Errno
err Errno -> Errno -> Bool
forall a. Eq a => a -> a -> Bool
== Errno
eROFS Bool -> Bool -> Bool
|| Errno
err Errno -> Errno -> Bool
forall a. Eq a => a -> a -> Bool
== Errno
eTXTBSY Bool -> Bool -> Bool
||
                    Errno
err Errno -> Errno -> Bool
forall a. Eq a => a -> a -> Bool
== Errno
ePERM)
                   then Bool -> IO Bool
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Bool
False
                   else String -> PosixPath -> IO Bool
forall a. String -> PosixPath -> IO a
throwErrnoPath String
"fileAccess" PosixPath
name


-- | @getFileStatus path@ calls gets the @FileStatus@ information (user ID,
-- size, access times, etc.) for the file @path@.
--
-- Note: calls @stat@.
getFileStatus :: PosixPath -> IO FileStatus
getFileStatus :: PosixPath -> IO FileStatus
getFileStatus PosixPath
path = do
  ForeignPtr CStat
fp <- Int -> IO (ForeignPtr CStat)
forall a. Int -> IO (ForeignPtr a)
mallocForeignPtrBytes (Int
144)
{-# LINE 180 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
  withForeignPtr fp $ \p ->
    withFilePath path $ \s ->
      throwErrnoPathIfMinus1Retry_ "getFileStatus" path (c_stat s p)
  FileStatus -> IO FileStatus
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (ForeignPtr CStat -> FileStatus
Common.FileStatus ForeignPtr CStat
fp)

-- | Acts as 'getFileStatus' except when the 'PosixPath' refers to a symbolic
-- link. In that case the @FileStatus@ information of the symbolic link itself
-- is returned instead of that of the file it points to.
--
-- Note: calls @lstat@.
getSymbolicLinkStatus :: PosixPath -> IO FileStatus
getSymbolicLinkStatus :: PosixPath -> IO FileStatus
getSymbolicLinkStatus PosixPath
path = do
  ForeignPtr CStat
fp <- Int -> IO (ForeignPtr CStat)
forall a. Int -> IO (ForeignPtr a)
mallocForeignPtrBytes (Int
144)
{-# LINE 193 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
  withForeignPtr fp $ \p ->
    withFilePath path $ \s ->
      throwErrnoPathIfMinus1_ "getSymbolicLinkStatus" path (c_lstat s p)
  FileStatus -> IO FileStatus
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (ForeignPtr CStat -> FileStatus
Common.FileStatus ForeignPtr CStat
fp)

foreign import capi unsafe "HsUnix.h lstat"
  c_lstat :: CString -> Ptr CStat -> IO CInt

-- | @createNamedPipe fifo mode@
-- creates a new named pipe, @fifo@, with permissions based on
-- @mode@. May fail with 'throwErrnoPathIfMinus1_' if a file named @name@
-- already exists or if the effective user ID of the current process doesn't
-- have permission to create the pipe.
--
-- Note: calls @mkfifo@.
createNamedPipe :: PosixPath -> FileMode -> IO ()
createNamedPipe :: PosixPath -> CMode -> IO ()
createNamedPipe PosixPath
name CMode
mode = do
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s ->
    String -> PosixPath -> IO CInt -> IO ()
forall a. (Eq a, Num a) => String -> PosixPath -> IO a -> IO ()
throwErrnoPathIfMinus1_ String
"createNamedPipe" PosixPath
name (CString -> CMode -> IO CInt
c_mkfifo CString
s CMode
mode)


{-# LINE 220 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
-- | @createDevice path mode dev@ creates either a regular or a special file
-- depending on the value of @mode@ (and @dev@).  @mode@ will normally be either
-- 'blockSpecialMode' or 'characterSpecialMode'.  May fail with
-- 'throwErrnoPathIfMinus1_' if a file named @name@ already exists or if the
-- effective user ID of the current process doesn't have permission to create
-- the file.
--
-- Note: calls @mknod@.
createDevice :: PosixPath -> FileMode -> DeviceID -> IO ()
createDevice :: PosixPath -> CMode -> DeviceID -> IO ()
createDevice PosixPath
path CMode
mode DeviceID
dev =
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
path ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s ->
    String -> PosixPath -> IO CInt -> IO ()
forall a. (Eq a, Num a) => String -> PosixPath -> IO a -> IO ()
throwErrnoPathIfMinus1_ String
"createDevice" PosixPath
path (CString -> CMode -> DeviceID -> IO CInt
c_mknod CString
s CMode
mode DeviceID
dev)

foreign import capi unsafe "HsUnix.h mknod"
  c_mknod :: CString -> CMode -> CDev -> IO CInt


{-# LINE 237 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}

-- -----------------------------------------------------------------------------
-- Hard links

-- | @createLink old new@ creates a new path, @new@, linked to an existing file,
-- @old@.
--
-- Note: calls @link@.
createLink :: PosixPath -> PosixPath -> IO ()
createLink :: PosixPath -> PosixPath -> IO ()
createLink PosixPath
name1 PosixPath
name2 =
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name1 ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s1 ->
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name2 ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s2 ->
  String -> PosixPath -> PosixPath -> IO CInt -> IO ()
forall a.
(Eq a, Num a) =>
String -> PosixPath -> PosixPath -> IO a -> IO ()
throwErrnoTwoPathsIfMinus1_ String
"createLink" PosixPath
name1 PosixPath
name2 (CString -> CString -> IO CInt
c_link CString
s1 CString
s2)

-- | @removeLink path@ removes the link named @path@.
--
-- Note: calls @unlink@.
removeLink :: PosixPath -> IO ()
removeLink :: PosixPath -> IO ()
removeLink PosixPath
name =
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s ->
  String -> PosixPath -> IO CInt -> IO ()
forall a. (Eq a, Num a) => String -> PosixPath -> IO a -> IO ()
throwErrnoPathIfMinus1_ String
"removeLink" PosixPath
name (CString -> IO CInt
c_unlink CString
s)

-- -----------------------------------------------------------------------------
-- Symbolic Links

-- | @createSymbolicLink file1 file2@ creates a symbolic link named @file2@
-- which points to the file @file1@.
--
-- Symbolic links are interpreted at run-time as if the contents of the link
-- had been substituted into the path being followed to find a file or directory.
--
-- Note: calls @symlink@.
createSymbolicLink :: PosixPath -> PosixPath -> IO ()
createSymbolicLink :: PosixPath -> PosixPath -> IO ()
createSymbolicLink PosixPath
name1 PosixPath
name2 =
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name1 ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s1 ->
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name2 ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s2 ->
  String -> PosixPath -> PosixPath -> IO CInt -> IO ()
forall a.
(Eq a, Num a) =>
String -> PosixPath -> PosixPath -> IO a -> IO ()
throwErrnoTwoPathsIfMinus1_ String
"createSymbolicLink" PosixPath
name1 PosixPath
name2 (CString -> CString -> IO CInt
c_symlink CString
s1 CString
s2)

foreign import ccall unsafe "symlink"
  c_symlink :: CString -> CString -> IO CInt

-- ToDo: should really use SYMLINK_MAX, but not everyone supports it yet,
-- and it seems that the intention is that SYMLINK_MAX is no larger than
-- PATH_MAX.

{-# LINE 286 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}

-- | Reads the @PosixPath@ pointed to by the symbolic link and returns it.
--
-- Note: calls @readlink@.
readSymbolicLink :: PosixPath -> IO PosixPath
readSymbolicLink :: PosixPath -> IO PosixPath
readSymbolicLink PosixPath
file =
  Int -> (CString -> IO PosixPath) -> IO PosixPath
forall a b. Storable a => Int -> (Ptr a -> IO b) -> IO b
allocaArray0 (Int
4096) ((CString -> IO PosixPath) -> IO PosixPath)
-> (CString -> IO PosixPath) -> IO PosixPath
forall a b. (a -> b) -> a -> b
$ \CString
buf -> do
{-# LINE 293 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
    withFilePath file $ \s -> do
      len <- throwErrnoPathIfMinus1 "readSymbolicLink" file $
        c_readlink s buf (4096)
{-# LINE 296 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
      peekFilePathLen (buf,fromIntegral len)

foreign import ccall unsafe "readlink"
  c_readlink :: CString -> CString -> CSize -> IO CInt

-- -----------------------------------------------------------------------------
-- Renaming files

-- | @rename old new@ renames a file or directory from @old@ to @new@.
--
-- Note: calls @rename@.
rename :: PosixPath -> PosixPath -> IO ()
rename :: PosixPath -> PosixPath -> IO ()
rename PosixPath
name1 PosixPath
name2 =
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name1 ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s1 ->
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name2 ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s2 ->
  String -> PosixPath -> PosixPath -> IO CInt -> IO ()
forall a.
(Eq a, Num a) =>
String -> PosixPath -> PosixPath -> IO a -> IO ()
throwErrnoTwoPathsIfMinus1_ String
"rename" PosixPath
name1 PosixPath
name2 (CString -> CString -> IO CInt
c_rename CString
s1 CString
s2)

foreign import ccall unsafe "rename"
   c_rename :: CString -> CString -> IO CInt

-- -----------------------------------------------------------------------------
-- chown()


{-# LINE 320 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}

-- | @setOwnerAndGroup path uid gid@ changes the owner and group of @path@ to
-- @uid@ and @gid@, respectively.
--
-- If @uid@ or @gid@ is specified as -1, then that ID is not changed.
--
-- Note: calls @chown@.
setOwnerAndGroup :: PosixPath -> UserID -> GroupID -> IO ()
setOwnerAndGroup :: PosixPath -> UserID -> GroupID -> IO ()
setOwnerAndGroup PosixPath
name UserID
uid GroupID
gid = do
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s ->
    String -> PosixPath -> IO CInt -> IO ()
forall a. (Eq a, Num a) => String -> PosixPath -> IO a -> IO ()
throwErrnoPathIfMinus1_ String
"setOwnerAndGroup" PosixPath
name (CString -> UserID -> GroupID -> IO CInt
c_chown CString
s UserID
uid GroupID
gid)

foreign import ccall unsafe "chown"
  c_chown :: CString -> CUid -> CGid -> IO CInt


{-# LINE 342 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}


{-# LINE 344 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
-- | Acts as 'setOwnerAndGroup' but does not follow symlinks (and thus
-- changes permissions on the link itself).
--
-- Note: calls @lchown@.
setSymbolicLinkOwnerAndGroup :: PosixPath -> UserID -> GroupID -> IO ()
setSymbolicLinkOwnerAndGroup :: PosixPath -> UserID -> GroupID -> IO ()
setSymbolicLinkOwnerAndGroup PosixPath
name UserID
uid GroupID
gid = do
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s ->
    String -> PosixPath -> IO CInt -> IO ()
forall a. (Eq a, Num a) => String -> PosixPath -> IO a -> IO ()
throwErrnoPathIfMinus1_ String
"setSymbolicLinkOwnerAndGroup" PosixPath
name
        (CString -> UserID -> GroupID -> IO CInt
c_lchown CString
s UserID
uid GroupID
gid)

foreign import ccall unsafe "lchown"
  c_lchown :: CString -> CUid -> CGid -> IO CInt

{-# LINE 357 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}

-- -----------------------------------------------------------------------------
-- Setting file times

-- | @setFileTimes path atime mtime@ sets the access and modification times
-- associated with file @path@ to @atime@ and @mtime@, respectively.
--
-- Note: calls @utime@.
setFileTimes :: PosixPath -> EpochTime -> EpochTime -> IO ()
setFileTimes :: PosixPath -> EpochTime -> EpochTime -> IO ()
setFileTimes PosixPath
name EpochTime
atime EpochTime
mtime = do
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s ->
   Int -> (Ptr CUtimbuf -> IO ()) -> IO ()
forall a b. Int -> (Ptr a -> IO b) -> IO b
allocaBytes (Int
16) ((Ptr CUtimbuf -> IO ()) -> IO ())
-> (Ptr CUtimbuf -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \Ptr CUtimbuf
p -> do
{-# LINE 369 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
     ((\hsc_ptr -> pokeByteOff hsc_ptr 0))  p atime
{-# LINE 370 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
     ((\hsc_ptr -> pokeByteOff hsc_ptr 8)) p mtime
{-# LINE 371 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
     throwErrnoPathIfMinus1_ "setFileTimes" name (c_utime s p)

-- | Like 'setFileTimes' but timestamps can have sub-second resolution.
--
-- Note: calls @utimensat@ or @utimes@. Support for high resolution timestamps
--   is filesystem dependent with the following limitations:
--
-- - HFS+ volumes on OS X truncate the sub-second part of the timestamp.
--
setFileTimesHiRes :: PosixPath -> POSIXTime -> POSIXTime -> IO ()

{-# LINE 382 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
setFileTimesHiRes name atime mtime =
  withFilePath name $ \s ->
    withArray [Common.toCTimeSpec atime, Common.toCTimeSpec mtime] $ \times ->
      throwErrnoPathIfMinus1_ "setFileTimesHiRes" name $
        Common.c_utimensat (-100) s times 0
{-# LINE 387 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}

{-# LINE 393 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}

-- | Like 'setFileTimesHiRes' but does not follow symbolic links.
-- This operation is not supported on all platforms. On these platforms,
-- this function will raise an exception.
--
-- Note: calls @utimensat@ or @lutimes@. Support for high resolution timestamps
--   is filesystem dependent with the following limitations:
--
-- - HFS+ volumes on OS X truncate the sub-second part of the timestamp.
--
setSymbolicLinkTimesHiRes :: PosixPath -> POSIXTime -> POSIXTime -> IO ()

{-# LINE 405 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
setSymbolicLinkTimesHiRes name atime mtime =
  withFilePath name $ \s ->
    withArray [Common.toCTimeSpec atime, Common.toCTimeSpec mtime] $ \times ->
      throwErrnoPathIfMinus1_ "setSymbolicLinkTimesHiRes" name $
        Common.c_utimensat (-100) s times (256)
{-# LINE 410 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}

{-# LINE 420 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}

-- | @touchFile path@ sets the access and modification times associated with
-- file @path@ to the current time.
--
-- Note: calls @utime@.
touchFile :: PosixPath -> IO ()
touchFile :: PosixPath -> IO ()
touchFile PosixPath
name = do
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s ->
   String -> PosixPath -> IO CInt -> IO ()
forall a. (Eq a, Num a) => String -> PosixPath -> IO a -> IO ()
throwErrnoPathIfMinus1_ String
"touchFile" PosixPath
name (CString -> Ptr CUtimbuf -> IO CInt
c_utime CString
s Ptr CUtimbuf
forall a. Ptr a
nullPtr)

-- | Like 'touchFile' but does not follow symbolic links.
-- This operation is not supported on all platforms. On these platforms,
-- this function will raise an exception.
--
-- Note: calls @lutimes@.
touchSymbolicLink :: PosixPath -> IO ()

{-# LINE 437 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}
touchSymbolicLink name =
  withFilePath name $ \s ->
    throwErrnoPathIfMinus1_ "touchSymbolicLink" name (Common.c_lutimes s nullPtr)

{-# LINE 444 "libraries/unix/System/Posix/Files/PosixString.hsc" #-}

-- -----------------------------------------------------------------------------
-- Setting file sizes

-- | Truncates the file down to the specified length. If the file was larger
-- than the given length before this operation was performed the extra is lost.
--
-- Note: calls @truncate@.
setFileSize :: PosixPath -> FileOffset -> IO ()
setFileSize :: PosixPath -> FileOffset -> IO ()
setFileSize PosixPath
file FileOffset
off =
  PosixPath -> (CString -> IO ()) -> IO ()
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
file ((CString -> IO ()) -> IO ()) -> (CString -> IO ()) -> IO ()
forall a b. (a -> b) -> a -> b
$ \CString
s ->
    String -> PosixPath -> IO CInt -> IO ()
forall a. (Eq a, Num a) => String -> PosixPath -> IO a -> IO ()
throwErrnoPathIfMinus1_ String
"setFileSize" PosixPath
file (CString -> FileOffset -> IO CInt
c_truncate CString
s FileOffset
off)

foreign import capi unsafe "HsUnix.h truncate"
  c_truncate :: CString -> COff -> IO CInt

-- -----------------------------------------------------------------------------
-- pathconf()/fpathconf() support

-- | @getPathVar var path@ obtains the dynamic value of the requested
-- configurable file limit or option associated with file or directory @path@.
-- For defined file limits, @getPathVar@ returns the associated
-- value.  For defined file options, the result of @getPathVar@
-- is undefined, but not failure.
--
-- Note: calls @pathconf@.
getPathVar :: PosixPath -> PathVar -> IO Limit
getPathVar :: PosixPath -> PathVar -> IO CLong
getPathVar PosixPath
name PathVar
v = do
  PosixPath -> (CString -> IO CLong) -> IO CLong
forall a. PosixPath -> (CString -> IO a) -> IO a
withFilePath PosixPath
name ((CString -> IO CLong) -> IO CLong)
-> (CString -> IO CLong) -> IO CLong
forall a b. (a -> b) -> a -> b
$ \ CString
nameP ->
    String -> PosixPath -> IO CLong -> IO CLong
forall a. (Eq a, Num a) => String -> PosixPath -> IO a -> IO a
throwErrnoPathIfMinus1 String
"getPathVar" PosixPath
name (IO CLong -> IO CLong) -> IO CLong -> IO CLong
forall a b. (a -> b) -> a -> b
$
      CString -> CInt -> IO CLong
c_pathconf CString
nameP (PathVar -> CInt
Common.pathVarConst PathVar
v)

foreign import ccall unsafe "pathconf"
  c_pathconf :: CString -> CInt -> IO CLong