io.popen : how to retrieve the return code.

[Laurent FAILLIE <l_faillie@...>]

Hello,

In php, with exec command you can retrieve both output and return code of a command.
i.e. :
    exec($cmd, $output, $rc);

In LUA, the only way I found to retrieve the output of a command is to use io.popen() then io.read() ... but in this case I'm loosing the return code.

How can I retrieve both the output and associated return code ?

Thanks

Laurent