os.execute not working with love2d

Question

I'm trying to use os.execute(), but I'm getting this problem:

attempt to call field 'execute' (a nil value)

I've done os = require 'os' but when I do: os.execute("mkdir" .. var) it's giving me the above error.

From what I've worked out, it's because it's not calling in all of the stuff from os, but I've looked and I can't figure out how to call in everything from os. In python i'd do from os import * but I don't know the code for lua. I've tried using package.loadlib('os', 'execute') but that didn't work. :/

EDIT: I did a separate test with love2D, and it worked. so I can't see why this isn't working...

are you sure you don't have code somewhere that is overwritting/reassigning the os.execute function in the problem script? do you have any local table objects named os? — Mike Corcoran
– Mike Corcoran, Commented Feb 22, 2013 at 16:19
ohhh right! I've got os = "NT"/"unix". That explains why it's not working :D. Thank you! I'll rename the variable now :) EDIT: You ought to add that as an answer. — Aster
– Aster, Commented Feb 22, 2013 at 16:22
there should be a delete option under your post if you wish to delete the question — Mike Corcoran
– Mike Corcoran, Commented Feb 22, 2013 at 16:39

Mike Corcoran · Accepted Answer · 2013-02-22 16:39:12Z

2

are you sure you don't have code somewhere that is overwritting/reassigning the os.execute function in the problem script? do you have any local table objects named os?

answered Feb 22, 2013 at 16:39

Mike Corcoran

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2 Comments

Aster Over a year ago

Thanks, this helps. I've renamed my os variable to host :3

Mike Corcoran Over a year ago

ahhh, the beauty of dynamic languages letting you clobber built-in libraries :P

mike bayko · Accepted Answer · 2016-12-08 02:55:26Z

0

try this:

require 'os';
if package.loaded['os'] and type(package.loaded['os']) == "table" then
  local os = package.loaded['os'];
  --from here use the local os variable to call anything inside os.
  --main block of code
end

I hope this works for you.

answered Dec 8, 2016 at 2:55

mike bayko

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