[Haskell] system command

[Krasimir Angelov]

System.Cmd.rawSystem provides more portable interface than
System.Cmd.system. The behaviour of System.Cmd.system depends on the
installed system shell. rawSystem directly creates a new process
without interaction with the shell. System.Process module provides
even more advanced API.

Cheers,
   Krasimir

2006/7/4, Duncan Coutts <duncan.coutts at worc.ox.ac.uk>:
> On Tue, 2006-07-04 at 11:22 +0200, J. E. Palomar wrote:
> > Hi,
> >
> > I am newbie in Haskell programing and need to launch
> > a shell command through a Haskell code.
> > In other programing languages like C or Java I know how
> > carry out this task; for instance the code
> >
> > system("ls -l ")
> >
> > in C or
> >
> > exec("ls -l")
> >
> > in Java  work fine and lists the working directory.
> > I know that in interactive mode the Haskell command
> > :! ls -l
> > is similar, but ¿It is possible something like in Haskell
> > non-interactive mode?
>
> The function you're looking for is called 'system' and is in the System
> module.
>
> System.system :: String -> IO ExitCode
>
> it does just the same as the C and Java versions.
>
> BTW, one way you could have found this out is to search using hoogle:
>
> http://haskell.org/hoogle/
>
> searching for 'system' gives the one we want as part of the search
> results
>
> http://haskell.org/hoogle/?q=system
>
> and links to the detailed documentation:
>
> http://haskell.org/ghc/docs/latest/html/libraries/base/System-Cmd.html#v
> %3Asystem
>
> Duncan
>
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