diff options
Diffstat (limited to 'Utility/UserInfo.hs')
| -rw-r--r-- | Utility/UserInfo.hs | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/Utility/UserInfo.hs b/Utility/UserInfo.hs index 7e94caf..ec0b0d0 100644 --- a/Utility/UserInfo.hs +++ b/Utility/UserInfo.hs @@ -15,18 +15,17 @@ module Utility.UserInfo ( ) where import Utility.Env +import Utility.Data import System.PosixCompat -#ifndef mingw32_HOST_OS import Control.Applicative -#endif import Prelude {- Current user's home directory. - - getpwent will fail on LDAP or NIS, so use HOME if set. -} myHomeDir :: IO FilePath -myHomeDir = myVal env homeDirectory +myHomeDir = either error return =<< myVal env homeDirectory where #ifndef mingw32_HOST_OS env = ["HOME"] @@ -35,7 +34,7 @@ myHomeDir = myVal env homeDirectory #endif {- Current user's user name. -} -myUserName :: IO String +myUserName :: IO (Either String String) myUserName = myVal env userName where #ifndef mingw32_HOST_OS @@ -49,15 +48,15 @@ myUserGecos :: IO (Maybe String) #if defined(__ANDROID__) || defined(mingw32_HOST_OS) myUserGecos = return Nothing #else -myUserGecos = Just <$> myVal [] userGecos +myUserGecos = eitherToMaybe <$> myVal [] userGecos #endif -myVal :: [String] -> (UserEntry -> String) -> IO String +myVal :: [String] -> (UserEntry -> String) -> IO (Either String String) myVal envvars extract = go envvars where #ifndef mingw32_HOST_OS - go [] = extract <$> (getUserEntryForID =<< getEffectiveUserID) + go [] = Right . extract <$> (getUserEntryForID =<< getEffectiveUserID) #else - go [] = error $ "environment not set: " ++ show envvars + go [] = return $ Left ("environment not set: " ++ show envvars) #endif - go (v:vs) = maybe (go vs) return =<< getEnv v + go (v:vs) = maybe (go vs) (return . Right) =<< getEnv v |