Re: Getting a table from commandline output

[Georg Lehner <jorge-lua@...>]

Hello Luciano!

Try the following:

function execute(command)
    local lines = {}
    local file = io.popen(command)
    for line in file:lines() do
        table.insert(lines, line)
    end
    file:close()
    return lines
end

This does not explain why your code does not what you want, but is 
should work.

You can list the whole table with:

output = execute('ls')
for n,line in output do print(n,line) end

Maybe your ls does not output two lines..

Regards,

    Jorge-León


On 11/06/11 15:18, Luciano de Souza wrote:
> Hello listers,
>
> I am trying to load a table with lines from a shell output. However, I 
> am not able to understand what is wrong.
>
> #!./usr/bin/env lua
>
> function execute(command)
> local lines = {}
> local file = io.popen(command)
>  while true do
> line = file:read('*l')
> table.insert(lines, line)
> if line == nil then break
> end
> file:close()
> return lines
> end
>
> output = execute('ls')
> print(output[2])
>
> Each line of the table  should contain a line from the output, but in 
> stead of it, I have a looping.
>
> Luciano