[Haskell-cafe] How to get program command line arguments in Unicode-aware way (Unix/Linux)?

[Dimitry Golubovsky]

Hi,

I am trying to process command line arguments that may contain Unicode
(cyrillic in this example) characters.

The standard GHC's getArgs seems to pass whatever was obtained from
the underlying C library
without any regard to encoding, e. g the following program (testarg.hs):

module Main where

import System.Environment

main = do
  x <- getArgs
  mapM (putStrLn . show) x

being invoked (ghc 6.10.1)

runghc testarg -T 'при<в>ет'

prints the following:

"-T"
"\208\191\209\128\208\184<\208\178>\208\181\209\130"

(not correct, all bytes were passed without proper encoding)

Is there any way to get program arguments in GHC Unicode-aware? Or at
least assuming that they are always in UTF-8?
Something like System.IO.UTF8, but for command line arguments?

Thanks.

PS: BTW  runhugs testarg -T 'при<в>ет' prints:

"-T"
"\1087\1088\1080<\1074>\1077\1090"

which is correct.

-- 
Dimitry Golubovsky

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