[Vala] Knowing when a terminal command is done

[Christian Capasso <capasso912 gmail com>]

Hi,

I'm working with some terminal commands, that I call using
"Process.spawn_command_line_async": how can I know when these commands are
completed?

For example, one of the operation consists of downloading a file from the
web: are there any possibilities to get its progress or, at least, get a
notification of when the download has been completed?

Thank you very much!