I think you have to feed the commands to lftp from the stdin. Like this:
echo queue get ... | lftp -c "attach 1234"
The commands after attach command in your script are executed after the
attach is finished (detached).
вс, 10 дек. 2017, 12:00 Tim <hayesti86+l...@gmail.com>:
> I'm trying to automate LFTP activity from a Python script. I'm would like
> to achieve a behaviour whereby if there is a background LFTP process then
> attach to it and append to its existing queue. I'm invoking LFTP with -f
> and feeding it a string of commands generated from my Python script.
>
> I'm using LFTP version 4.6.0
>
> If I attach to an existing process and queue files:
> attach 1234
> queue get "ubuntu-16.04.3-desktop-amd64.iso"
> bye
>
> I receive a not connected error and the file isn't queued
>
> If I attach to an existing process, open a connection and queue files:
> attach 1234
> open sftp://releases.ubuntu.com/ -u ubuntu,ubuntu
> queue get "ubuntu-16.04.3-desktop-amd64.iso"
> bye
>
> It creates another process. The output resembles this:
> [1234] Attached to terminal.
> [1234] Detaching from the terminal to complete transfers...
> [5678] Moving to background to complete transfers...
>
> Is there a way to achieve the desired behaviour, i.e. maximum of one LFTP
> process running? Thanks.
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