Some child processes are still left open when waybar terminates

[matejdro]

To reproduce:

1. Setup a custom module (and add that module to the waybar):

    "custom/process-broken-demo": {
        "return-type": "json",
        "escape": false,
        "exec": "$HOME/.config/waybar/process-test.sh"
    }

2. Put this into the process-test.sh:

#!/usr/bin/env bash

function_call() {
    sleep 1
}

while read line; do
        function_call
done < <(sleep 9999)

3. Run ps -u | grep process-test. Note that the only returned entry should be the grep process.
4. Start waybar.
5. Run step 3 again. Note that there are two extra processes now, started by waybar
6. Close waybar
7. Run step 3 again. Note that one extra process is still there, even though waybar has been closed

Probably related to #358?

[Alexays]

Can you check with #1748?

[matejdro]

Thanks for looking into it. I tried it out and it still seems to happen. I've updated the first post with full reproduce steps, so it should be much easier to reproduce now.

[lilydjwg]

I noticed that this issue states a different case than what I had and have fixed. I have zombies when a monitor disconnects and reconnects repeatedly, but this issue is about waybar termination.

[matejdro]

@Alexays Can you reopen this issue? From my previous testing, PR does not fix this issue.

[savely-krasovsky]

Also there is a problem with mediaplayer.py which is python and does not use process substitution.