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Don't crash when there is a leftover socket file #13

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Don't crash when there is a leftover socket file #13

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11 changes: 8 additions & 3 deletions src/Server.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -8,15 +8,20 @@ import Network (PortID(UnixSocket), Socket, accept, listenOn, sClose)
import System.Directory (removeFile)
import System.Exit (ExitCode(ExitSuccess))
import System.IO (Handle, hClose, hFlush, hGetLine, hPutStrLn)
import System.IO.Error (ioeGetErrorType, isDoesNotExistError)
import System.IO.Error (ioeGetErrorType, isAlreadyInUseError, isDoesNotExistError)

import CommandLoop (newCommandLoopState, startCommandLoop)
import Types (ClientDirective(..), Command, ServerDirective(..))
import Util (readMaybe)

createListenSocket :: FilePath -> IO Socket
createListenSocket socketPath =
listenOn (UnixSocket socketPath)
createListenSocket socketPath = do
r <- tryJust (guard . isAlreadyInUseError) $ listenOn (UnixSocket socketPath)
case r of
Right socket -> return socket
Left _ -> do
removeFile socketPath
listenOn (UnixSocket socketPath)

startServer :: FilePath -> Maybe Socket -> IO ()
startServer socketPath mbSock = do
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