Hi,
my patch for the use of `popen' is just an ad-hoc solution (aka hack)
that might be useful for people trying to do some shell-scripting in
hugs, before anything more fundamental becomes available. The security
problem (thanks to Fergus Henderson and Carl Witty for pointing it out)
must be dea
Hello!
On Tue, Aug 24, 1999 at 03:41:18AM +1000, Fergus Henderson wrote:
> [...]
> This is a convenient hack, but IMHO it is not suitable for inclusion
> in the Haskell standard library, because it increases the risk of
> security holes in Haskell applications.
I agree. I don't like that simila
On 21-Aug-1999, Heribert Schuetz <[EMAIL PROTECTED]> wrote:
> The appended patch to Hugs98 (to be applied in the src subdirectory)
> might be of some help for those who want to do shell scripting in
> Haskell. It modifies IO.openFile as follows:
>
> - If the name of a file opened in ReadMode ends
> And there is _no_ handle to the output of the command! An obvious hack is
> to use redirecting; here is how you implement a simple date function in
> Haskell:
>
> date :: IO String
> date =
> do system "date > /tmp/answer"
>readFile "/tmp/answer"
>
[..]
> I implemented these fu
Heribert Schuetz <[EMAIL PROTECTED]> writes:
> Hi,
>
> The appended patch to Hugs98 (to be applied in the src subdirectory)
> might be of some help for those who want to do shell scripting in
> Haskell. It modifies IO.openFile as follows:
>
> - If the name of a file opened in ReadMode ends in "
On Fri, 20 Aug 1999, Jeff Burdges wrote:
> > Just wondering if someone uses Hugs for writing Unix-Shell Scripts. Or
> > what would you think about a Haskell-Shell. SCSH (a Scheme-Shell)
> > brought me on that idea. Don't you think that would be a nice thing?
>
> Yes, it would be a wonderful idea
Jim Mattson's "Haskell shell" may still be distributed as
misc/examples/hsh/Hsh.hs in GHC. I include what I believe
to be a reasonably current (1997) version below.
Will
Peter Hancock <[EMAIL PROTECTED]> wrote:
I found an old (and stale) URL
http://www.dcs.gla.ac.uk/~mattson/Hsh.html">Unix sh
Hi,
The appended patch to Hugs98 (to be applied in the src subdirectory)
might be of some help for those who want to do shell scripting in
Haskell. It modifies IO.openFile as follows:
- If the name of a file opened in ReadMode ends in "|", then the part
before the "|" is considered a program a
Koen Claessen wrote:
>
> Hello,
>
> | Just wondering if someone uses Hugs for writing Unix-Shell Scripts. Or
> | what would you think about a Haskell-Shell.
>
> These are two quite separate issues of course. I can comment on the first
> one.
>
Of course you're rigth, and I better had just ask
Hello,
| Just wondering if someone uses Hugs for writing Unix-Shell Scripts. Or
| what would you think about a Haskell-Shell.
These are two quite separate issues of course. I can comment on the first
one.
A while ago, we had a discussion among some Haskell hackers here at
Chalmers how we coul
> "Jeff" == Jeff Burdges <[EMAIL PROTECTED]> writes:
>> Just wondering if someone uses Hugs for writing Unix-Shell Scripts. Or
>> what would you think about a Haskell-Shell. SCSH (a Scheme-Shell)
>> brought me on that idea. Don't you think that would be a nice thing?
Jeff> Yes, it would be a
I found an old (and stale) URL
http://www.dcs.gla.ac.uk/~mattson/Hsh.html">Unix shell in GHC
which may be relevant to this thread. As I dimly recall it was a few
screenfulls of code, and only a "proof of concept". Perhaps one can
find a non-stale link by a web search?
--
Peter
You also need some type of pipe functionality.
There is a paper on arrows (by John Hughes?), that seems like it describes
a good way to implement pipes in Haskell.
-Alex-
___
S. Alexander Jacobson Shop.Com
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I am just learning Hugs/Haskell (Thanks for a great book ST!)
but already I am using hugs as script writing tool. It occured to me
to use it this way when I saw the 'illiterate' program in the hugs
manual. By reading in files and using list comprehensions, it seems
you express simple file manipul
> Just wondering if someone uses Hugs for writing Unix-Shell Scripts. Or
> what would you think about a Haskell-Shell. SCSH (a Scheme-Shell)
> brought me on that idea. Don't you think that would be a nice thing?
Yes, it would be a wonderful idea.. but Hugs would need to be madified since
a) it ha
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