Received: from relay11.mail.gandi.net (relay11.mail.gandi.net [217.70.178.231])
	by nld3-dev1.alpinelinux.org (Postfix) with ESMTPS id B4B79781B78
	for <~alpine/users@lists.alpinelinux.org>; Tue, 14 Jan 2020 22:19:08 +0000 (UTC)
Received: from [192.168.3.37] (15.30.14.81.rev.sfr.net [81.14.30.15])
	(Authenticated sender: michel.piquemal@ipik.org)
	by relay11.mail.gandi.net (Postfix) with ESMTPSA id C7816100003
	for <~alpine/users@lists.alpinelinux.org>; Tue, 14 Jan 2020 22:19:06 +0000 (UTC)
From: spam@ipik.org
Content-Type: text/plain;
	charset=us-ascii
Content-Transfer-Encoding: 7bit
Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\))
Subject: Re: Detect AudioCD insertion & list tracks
Date: Tue, 14 Jan 2020 23:19:05 +0100
References: <bc4f54788876e3e239be5ac4691a7848@ipik.org>
 <20200113163716.GA3940@marco.themis.pinknet.de>
 <EDC85CB3-D047-41BB-BA07-D261C7B26879@ipik.org>
To: ~alpine/users@lists.alpinelinux.org
In-Reply-To: <EDC85CB3-D047-41BB-BA07-D261C7B26879@ipik.org>
Message-Id: <6C3EA2CC-0A81-412B-9B87-1B60C8A3B99A@ipik.org>
X-Mailer: Apple Mail (2.3445.9.1)

...some progress, but unexpected outcome.

I managed to log env variables across certain events (plug/unplug usb
disk, change CDs)
Usb disk events clearly show ACTION=bind or ACTION=unbind accordingly
(plus other variables).
However, while ejecting a Audio CD shows the following:
DEVNAME=sr0
ACTION=change
SHLVL=1
HOME=/
SEQNUM=1118
MAJOR=11
DISK_MEDIA_CHANGE=1
DEVPATH=/devices/platform/soc/20980000.usb/usb1/1-1/1-1.2/1-1.2:1.0/
host0/target0:0:0/0:0:0:0/block/sr0
SUBSYSTEM=block
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MINOR=0
PWD=/
DEVTYPE=disk

strangely enough, inserting a CD does NOT generate ANY event at all
(no SEQNUM increment, nothing).
I'm on (uname -a):
Linux 5.4.8-0-rpi #1-Alpine Tue Jan 7 13:32:22 UTC 2020 armv6l Linux

Shouldn't CD insertion generate a hotplug event like ejecting does,
and plug/unplug USB disk do too?
Possibly a Kernel issue?