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Capturing output from operating system commands

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Posted by Nick Gammon   Australia  (22,973 posts)  [Biography] bio   Forum Administrator
Date Tue 07 Dec 2004 09:09 PM (UTC)
Message
I had this code in another thread, but it was a bit hard to find, so I'll put it here in the Lua section.

Here is an example of executing an operating system command, and capturing the output.


-- get a temporary file name
n = os.tmpname ()

-- execute a command
os.execute ("dir > " .. n)

-- display output
for line in io.lines (n) do
  print (line)
end

-- remove temporary file
os.remove (n)




- Nick Gammon

www.gammon.com.au, www.mushclient.com
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Posted by Poromenos   Greece  (1,037 posts)  [Biography] bio
Date Reply #1 on Wed 08 Dec 2004 09:38 PM (UTC)
Message
I found an ActiveX control to do that, tell me if anyone wants it (can't remember the name at the moment). Does the program have to stop for this lua code to work, or can it do it as it's running?

Vidi, Vici, Veni.
http://porocrom.poromenos.org/ Read it!
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Posted by Nick Gammon   Australia  (22,973 posts)  [Biography] bio   Forum Administrator
Date Reply #2 on Wed 08 Dec 2004 09:43 PM (UTC)
Message
Still trying to get the chess game to work, eh?

In this case, it runs the command and exits. Conceivably you might do it with piping, but that isn't enabled right now. Plus, I doubt it a bit.

- Nick Gammon

www.gammon.com.au, www.mushclient.com
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Posted by Poromenos   Greece  (1,037 posts)  [Biography] bio
Date Reply #3 on Wed 08 Dec 2004 09:50 PM (UTC)
Message
I tried piping, it doesn't work. The chess system runs great with that ActiveX control (if only Crafty had coordinate notation, aaargh).

Vidi, Vici, Veni.
http://porocrom.poromenos.org/ Read it!
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Posted by Nick Gammon   Australia  (22,973 posts)  [Biography] bio   Forum Administrator
Date Reply #4 on Wed 08 Dec 2004 09:55 PM (UTC)
Message
Here's a suggestion - write your own chess game in Lua. ;)

- Nick Gammon

www.gammon.com.au, www.mushclient.com
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Posted by Poromenos   Greece  (1,037 posts)  [Biography] bio
Date Reply #5 on Thu 09 Dec 2004 12:06 AM (UTC)
Message
I'm not trying to make a game, I'm trying to get the engine (the AI) to work, which I did with that control. I still haven't learned Lua :P

Vidi, Vici, Veni.
http://porocrom.poromenos.org/ Read it!
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