Re: [Haskell-cafe] How to reverse ghc encoding of command line arguments

Donn Cave wrote:

quoth Ben Franksen ...

...

Perhaps it is simpler to write our own getArgs/getEnv functions and directly convert the data we get from the system to a proper (Unicode) String?

I may be confused here - trying this out, I seem to be getting garbage I don't understand from System.Environment getArgs.

But there's a System.Posix.Env.ByteString getArgs, that looks like just what you propose above.

import qualified Data.ByteString.Char8 as P import qualified System.Posix.Env.ByteString as B import qualified Data.Text as T import Data.Text.Encoding (decodeUtf8, encodeUtf8)

argsb <- B.getArgs putStrLn ("byte args: " ++ show(argsb)) let argsu = map (encodeUtf8 . T.pack . P.unpack) argsb putStrLn ("UTF8 byte args: " ++ show(argsu))

$ ./cvtargs [string that perhaps should not be in this email!] byte args: ["S\228kkij\228rven","Polkka"] UTF8 byte args: ["S\195\164kkij\195\164rven","Polkka"]

Cool, I wasn't aware that System.Posix had that function. Now I need to see what to do for Windows... Anyway, many thanks to you and everyone else who offered suggestions. Cheers Ben -- "Make it so they have to reboot after every typo." -- Scott Adams