Use USER and HOME environment when set, and only fall back to getpwent, which doesn't work with LDAP or NIS.

Assistant/Ssh.hs

@@ -9,6 +9,7 @@ module Assistant.Ssh where
 
 import Common.Annex
 import Utility.TempFile
+import Utility.UserInfo
 
 import Data.Text (Text)
 import qualified Data.Text as T

Assistant/WebApp/Configurators/Local.hs

@@ -31,6 +31,7 @@ import Remote (prettyListUUIDs)
 import Annex.UUID
 import Types.StandardGroups
 import Logs.PreferredContent
+import Utility.UserInfo
 
 import Yesod
 import Data.Text (Text)

Assistant/WebApp/Configurators/Pairing.hs

@@ -26,6 +26,7 @@ import Utility.Verifiable
 import Utility.Network
 import Annex.UUID
 #endif
+import Utility.UserInfo
 
 import Yesod
 import Data.Text (Text)
@@ -34,7 +35,6 @@ import qualified Data.Text as T
 import qualified Data.Text.Encoding as T
 import qualified Data.ByteString.Lazy as B
 import Data.Char
-import System.Posix.User
 import qualified Control.Exception as E
 import Control.Concurrent
 #endif
@@ -97,7 +97,7 @@ startPairing stage oncancel alert muuid displaysecret secret = do
 		keypair <- genSshKeyPair
 		pairdata <- PairData
 			<$> getHostname
-			<*> getUserName
+			<*> myUserName
 			<*> pure reldir
 			<*> pure (sshPubKey keypair)
 			<*> (maybe genUUID return muuid)
@@ -160,7 +160,7 @@ promptSecret msg cont = pairPage $ do
 			let (username, hostname) = maybe ("", "")
 				(\(_, v, a) -> (T.pack $ remoteUserName v, T.pack $ fromMaybe (showAddr a) (remoteHostName v)))
 				(verifiableVal . fromPairMsg <$> msg)
-			u <- T.pack <$> liftIO getUserName
+			u <- T.pack <$> liftIO myUserName
 			let sameusername = username == u
                         let authtoken = webAppFormAuthToken
                         $(widgetFile "configurators/pairing/prompt")
@@ -177,9 +177,6 @@ secretProblem s
 toSecret :: Text -> Secret
 toSecret s = B.fromChunks [T.encodeUtf8 $ T.toLower $ T.filter isAlphaNum s]
 
-getUserName :: IO String
-getUserName = userName <$> (getUserEntryForID =<< getEffectiveUserID)
-
 pairPage :: Widget -> Handler RepHtml
 pairPage w = bootstrap (Just Config) $ do
 	sideBarDisplay

Assistant/WebApp/Configurators/Ssh.hs

@@ -21,13 +21,13 @@ import Logs.Remote
 import Remote
 import Logs.PreferredContent
 import Types.StandardGroups
+import Utility.UserInfo
 
 import Yesod
 import Data.Text (Text)
 import qualified Data.Text as T
 import qualified Data.Map as M
 import Network.Socket
-import System.Posix.User
 
 sshConfigurator :: Widget -> Handler RepHtml
 sshConfigurator a = bootstrap (Just Config) $ do
@@ -96,8 +96,7 @@ usable UsableSshInput = True
 
 getAddSshR :: Handler RepHtml
 getAddSshR = sshConfigurator $ do
-	u <- liftIO $ T.pack . userName
+	u <- liftIO $ T.pack <$> myUserName
-		<$> (getUserEntryForID =<< getEffectiveUserID)
 	((result, form), enctype) <- lift $
 		runFormGet $ renderBootstrap $ sshInputAForm $
 			SshInput Nothing (Just u) Nothing

Git/Config.hs

@@ -15,6 +15,7 @@ import Common
 import Git
 import Git.Types
 import qualified Git.Construct
+import Utility.UserInfo
 
 {- Returns a single git config setting, or a default value if not set. -}
 get :: String -> String -> Repo -> String

Git/Construct.hs

@@ -27,6 +27,7 @@ import Common
 import Git.Types
 import Git
 import qualified Git.Url as Url
+import Utility.UserInfo
 
 {- Finds the git repository used for the cwd, which may be in a parent
  - directory. -}

Init.hs

@@ -20,20 +20,16 @@ import qualified Annex.Branch
 import Logs.UUID
 import Annex.Version
 import Annex.UUID
-
+import Utility.UserInfo
-import System.Posix.User
 
 genDescription :: Maybe String -> Annex String
 genDescription (Just d) = return d
 genDescription Nothing = do
 	hostname <- maybe "" id <$> liftIO getHostname
 	let at = if null hostname then "" else "@"
-	username <- clicketyclickety
+	username <- liftIO myUserName
 	reldir <- liftIO . relHome =<< fromRepo Git.repoPath
 	return $ concat [username, at, hostname, ":", reldir]
-	where
-		clicketyclickety = liftIO $ userName <$>
-			(getUserEntryForID =<< getEffectiveUserID)
 
 initialize :: Maybe String -> Annex ()
 initialize mdescription = do

Remote/Bup.hs

@@ -26,6 +26,7 @@ import Remote.Helper.Encryptable
 import Crypto
 import Data.ByteString.Lazy.UTF8 (fromString)
 import Data.Digest.Pure.SHA
+import Utility.UserInfo
 
 type BupRepo = String
 

Utility/FreeDesktop.hs

@@ -25,6 +25,7 @@ module Utility.FreeDesktop (
 
 import Utility.Exception
 import Utility.Path
+import Utility.UserInfo
 import Utility.Process
 import Utility.PartialPrelude
 

Utility/Path.hs

@@ -14,9 +14,9 @@ import System.Directory
 import Data.List
 import Data.Maybe
 import Control.Applicative
-import System.Posix.User
 
 import Utility.Monad
+import Utility.UserInfo
 
 {- Returns the parent directory of a path. Parent of / is "" -}
 parentDir :: FilePath -> FilePath
@@ -128,10 +128,6 @@ preserveOrder (l:ls) new = found ++ preserveOrder ls rest
 runPreserveOrder :: ([FilePath] -> IO [FilePath]) -> [FilePath] -> IO [FilePath]
 runPreserveOrder a files = preserveOrder files <$> a files
 
-{- Current user's home directory. -}
-myHomeDir :: IO FilePath
-myHomeDir = homeDirectory <$> (getUserEntryForID =<< getEffectiveUserID)
-
 {- Converts paths in the home directory to use ~/ -}
 relHome :: FilePath -> IO String
 relHome path = do

Utility/UserInfo.hs

@@ -0,0 +1,32 @@
+{- 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

debian/changelog

@@ -24,6 +24,8 @@ git-annex (3.20121018) UNRELEASED; urgency=low
   * configure: Check that checksum programs produce correct checksums.
   * Re-enable dbus, using a new version of the library that fixes the memory
     leak.
+  * Use USER and HOME environment when set, and only fall back to getpwent,
+    which doesn't work with LDAP or NIS.
 
  -- Joey Hess <joeyh@debian.org>  Wed, 17 Oct 2012 14:24:10 -0400
 

doc/bugs/git-annex:_getUserEntryForID:_failed___40__Success__41__.mdwn

@@ -10,3 +10,4 @@ What version of git-annex are you using? On what operating system?
 Please provide any additional information below.
 
 
+> [[fixed|done]] --[[Joey]]