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➜ MUSHclient
➜ Lua
➜ Newb Lua Question
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| Posted by
| JoeScripter
(12 posts) Bio
|
| Date
| Sun 05 Nov 2006 07:06 AM (UTC) |
| Message
| I'm brand new to Lua, and have written a simple function to load information from a file. It works when I run it from Crimson Editor but seems to fail if I try using the script file in MUSHclient.
The lines in question are:
[snip]
function loaddirs (file)
dirs = {}
io.input (file)
[/snip]
It fails on the io.input line with:
[string "Script file"]:3: attempt to index global `io' (a nil value)
stack traceback:
[string "Script file"]:3: in function `loaddirs'
[string "Script file"]:21: in main chunk
Can anyone help me as to why io isn't recognizable within my function in mushclient? | | Top |
|
| Posted by
| Onoitsu2
USA (248 posts) Bio
|
| Date
| Reply #1 on Sun 05 Nov 2006 09:31 AM (UTC) |
| Message
| File IO is disabled via the "Sandbox" in MUSHclient, look in the Global Options Dialog, from file menu, and it gives instructions on disabling it, or if it is a plugin, you can add it to the trusted list, or just that particular world file. There are many options to allow that to not be set to nil.
Hope that helps :)
Laterzzz,
Onoitsu2 | | Top |
|
| Posted by
| JoeScripter
(12 posts) Bio
|
| Date
| Reply #2 on Sun 05 Nov 2006 02:44 PM (UTC) |
| Message
| | ah hah! That makes perfect sense now.. thank you! | | Top |
|
| Posted by
| Nick Gammon
Australia (23,140 posts) Bio
Forum Administrator |
| Date
| Reply #3 on Sun 05 Nov 2006 07:51 PM (UTC) |
| Message
| This seems to trap someone about once a week. How would this be? If instead of simply setting things like io to nil, the sandbox replaced them with a function to warn about the sandbox? Something like this:
/f = io.open ("foo", "r")
-->
Run-time error
World: SMAUG
Immediate execution
[string "Command line"]:1: Function 'io.open' disabled in Lua sandbox - see MUSHclient global preferences
This makes it clearer that the function is intentionally disabled, and how to go about fixing it. |
- Nick Gammon
www.gammon.com.au, www.mushclient.com | | Top |
|
| Posted by
| JoeScripter
(12 posts) Bio
|
| Date
| Reply #4 on Sun 05 Nov 2006 08:12 PM (UTC) |
| Message
| I think this would be an excellent change Nick! It stumped me until I found the Lua sandboxing section, then it all made sense.. giving someone a nudge in that direction may help for all those users who think they know everything and don't need to look at docs - like me! :)
p.s. It's long overdue, but I've just registered my copy of mushclient! After playing around and seeing how powerful Lua will allow my scripting to be, it seems like I've got a new (old?) project in automating my favorite mud :) Thanks again for such great software! | | Top |
|
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