How to catch and error message and how to make it create unix files instead of dos files??

[Alexandre Weffort Thenorio]

Thanks I actually have done that but couldn't understand how to use them.
Can you give me an example on a function that reads a file and in case the
file is not found you throw a string like "File not found" or so??

Best Regards

NooK

----- Original Message -----
From: "Hal Daume III" <hdaume@ISI.EDU>
To: "Alexandre Weffort Thenorio" <thenorio@home.se>
Cc: <haskell@haskell.org>
Sent: Sunday, March 02, 2003 3:11 AM
Subject: Re: How to catch and error message and how to make it create unix
files instead of dos files??


> Look at the functions try catch and bracket.
>
> --
>  Hal Daume III                                   | hdaume@isi.edu
>  "Arrest this man, he talks in maths."           | www.isi.edu/~hdaume
>
> On Sat, 1 Mar 2003, Alexandre Weffort Thenorio wrote:
>
> > I am trying to write a small software to take info from one file and
write it into another file. The problem is that when I don't give any input
I get the normal haskell nosuchfile error message but I want to give my own
error message. I am a newbie, how can I do that? Also I need the file that
is gonna be created (A text file), to be created in UNIX type and not as a
DOS file type, how can I do that? I am using ghc to compile on Windows.
> >
> > Here is the main code
> >
> > main :: IO()
> > main = do
> >  args <- getArgs
> >  codes <- codes args
> >  conax <- readconax "conax.txt"
> >  makeIrdFile (lines codes) (lines conax)
> >
> >
> > --Read input file------------------------------------
> > codes :: [String] -> IO[Char]
> > codes [] = return ""
> > codes (x:xs) = do
> >  first <- readFile x
> >  return first
> >
> > --Read Inbuilt file---------------------------------
> > readconax file = do
> >  list <- readFile file
> >  return list
>
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