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module Propellor.Property.Chroot.Util where
import Propellor.Property.Mount
import Utility.Exception
import Utility.Env
import Utility.Directory
import Control.Applicative
import Prelude
-- | When chrooting, it's useful to ensure that PATH has all the standard
-- directories in it. This adds those directories to whatever PATH is
-- already set.
standardPathEnv :: IO [(String, String)]
standardPathEnv = do
path <- getEnvDefault "PATH" "/bin"
addEntry "PATH" (path ++ stdPATH)
<$> getEnvironment
stdPATH :: String
stdPATH = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
-- | Removes the contents of a chroot. First, unmounts any filesystems
-- mounted within it.
removeChroot :: FilePath -> IO ()
removeChroot c = do
unmountBelow c
removeDirectoryRecursive c
-- | Returns true if a chroot directory is empty.
unpopulated :: FilePath -> IO Bool
unpopulated d = null <$> catchDefaultIO [] (dirContents d)
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