5.2.37: bg(1)ed job then only runs partially

[Steffen Nurpmeso]

Hello.

So first: this thread must not even start if the answer is "bash
justs sends a signal to the job's entire process group, if the
programs do not properly deal with that it cannot help that".
(ogg123 in particular is known to have signal issues.)
This just in case possible changes brought in possible bugs.

I have to workaround an inconvinience and therefore have a shell
wrapper around music playing over bluetooth

  $ playbt ...ogg

^ran over an hour, but i needed that terminal, so

  ^Z
  [1]+  Stopped                 playbt ..
  $ bg
  [1]+ playbt .. &

^i move the job to the background.. the music starts playing
again, .. but only for a few seconds..

  $ jobs
  [1]+  Running                 playbt ... &
  $ kill -CONT %1

I have to -CONT kill the job to make all processes of "playbt"
work again:

  steffen   3111  3106   0  0.0   2551   6940 Ss+  00:00:00 Oct21 pts/5     \_ 
-bash
  steffen  24711  3111   0  0.0    662    272 S    00:00:00 Oct21 pts/5     |   
\_ /bin/sh /home/steffen/usr-kent-crux-linux-x86_64/bin/playbt ...
  steffen  24712 24711   0  0.5  22646   5836 Sl   00:00:25 Oct21 pts/5     |   
    \_ ogg123 -q -d wav -f - ...
  steffen  24713 24711   0  1.1   4533   6420 Sl   00:00:54 Oct21 pts/5     |   
    \_ sox --no-show-progress --input-buffer 4194304 -t wav - -t alsa bass -20 
treble +8

Ie playbt here actually runs ($i being the current file)

                p='ogg123 -q -d wav -f -'

        $p "$i" | $sox --no-show-progress --input-buffer 4194304 -t wav - -t 
alsa bass -20 treble +8

Ie i presume playing then stops once the buffer runs empty, and
only a real -CONT can make the pipeline flow again, which makes me
struggle.

--steffen
|
|Der Kragenbaer,                The moon bear,
|der holt sich munter           he cheerfully and one by one
|einen nach dem anderen runter  wa.ks himself off
|(By Robert Gernhardt)