33 lines
814 B
Haskell
33 lines
814 B
Haskell
|
{- user info
|
||
|
|
-
|
||
|
|
- Copyright 2012 Joey Hess <joey@kitenet.net>
|
||
|
|
-
|
||
|
|
- Licensed under the GNU GPL version 3 or higher.
|
||
|
|
-}
|
||
|
|
|
||
|
|
module Utility.UserInfo (
|
||
|
|
myHomeDir,
|
||
|
|
myUserName
|
||
|
|
) where
|
||
|
|
|
||
|
|
import Control.Applicative
|
||
|
|
import System.Posix.User
|
||
|
|
import System.Posix.Env
|
||
|
|
|
||
|
|
{- Current user's home directory.
|
||
|
|
-
|
||
|
|
- getpwent will fail on LDAP or NIS, so use HOME if set. -}
|
||
|
|
myHomeDir :: IO FilePath
|
||
|
|
myHomeDir = myVal ["HOME"] homeDirectory
|
||
|
|
|
||
|
|
{- Current user's user name. -}
|
||
|
|
myUserName :: IO String
|
||
|
|
myUserName = myVal ["USER", "LOGNAME"] userName
|
||
|
|
|
||
|
|
myVal :: [String] -> (UserEntry -> String) -> IO String
|
||
|
|
myVal envvars extract = maybe (extract <$> getpwent) return =<< check envvars
|
||
|
|
where
|
||
|
|
check [] = return Nothing
|
||
|
|
check (v:vs) = maybe (check vs) (return . Just) =<< getEnv v
|
||
|
|
getpwent = getUserEntryForID =<< getEffectiveUserID
|