29 lines
655 B
Haskell
29 lines
655 B
Haskell
{- disk free space checking
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-
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- Copyright 2012 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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{-# LANGUAGE ForeignFunctionInterface #-}
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module Utility.DiskFree ( getDiskFree ) where
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import Common
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import Foreign.C.Types
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import Foreign.C.String
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import Foreign.C.Error
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foreign import ccall safe "libdiskfree.h diskfree" c_diskfree
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:: CString -> IO CULLong
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getDiskFree :: FilePath -> IO (Maybe Integer)
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getDiskFree path = withFilePath path $ \c_path -> do
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free <- c_diskfree c_path
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ifM (safeErrno <$> getErrno)
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( return $ Just $ toInteger free
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, return Nothing
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)
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where
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safeErrno (Errno v) = v == 0
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