Filemanipulation from script

[roadrunner116 0]

Hi,

I'm trying to remove a folder and a file from my Update Script before downloading the new stuff. Somehow the way I'm trying I don't have the right permissions. What am I doing wrong.

-- remove old
local ok, err = pcall(shell.execute,"cd..")
if not ok then
	print("Problem: ",ok,err,computer.freeMemory())
end

local ok, err = pcall(shell.execute,"rm sg")
if not ok then
	print("Problem: ",ok,err,computer.freeMemory())
end


local ok, err = pcall(shell.execute,"rm autorun.lua")
if not ok then
	print("Problem: ",ok,err,computer.freeMemory())
end

Thanks!

[Gangsir 14]

local ok, err = pcall(shell.execute,"cd..")

 

There's your problem. There should be a space after the cd, like so:

 

local ok, err = pcall(shell.execute,"cd ..")

 

 

Assuming you are not in the root directory (/) , in which case you can't go up a level(which is what two periods do), so that won't work.

[dgelessus 26]

cd.. is a special case that only works in DOS/Windows. The proper way to write it, as said above, is cd .. (cd is the command name, and .. is the single argument to the command). As far as I know cd .. does nothing if the current directory is /, at least it shouldn't cause any errors and such.

[TYKUHN2 2]

Try cd / instead so if it is in root it will stay there, if it isn't it will go straight to root.

 

Also avoid shell.run("rm ") because there is an API method to do it and, while yes it is miniscule, it improves performance of the script and is just good practice.

[roadrunner116 0]

Sorry, I was away for a week.

 

Thanks for your replys, now it works.

 

 

Try cd / instead so if it is in root it will stay there, if it isn't it will go straight to root.

 

Also avoid shell.run("rm ") because there is an API method to do it and, while yes it is miniscule, it improves performance of the script and is just good practice.

 

Which method are you referring to?

[Gangsir 14]

He means using the filesystem api to do it, instead of exec. another program. Look up OC's filesystem api.