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[Libcdio-devel] [PATCH] Multiprocess compatible get_media_changed_linux

From: Lukas Prediger
Subject: [Libcdio-devel] [PATCH] Multiprocess compatible get_media_changed_linux using the new CDROM_TIMED_MEDIA_CHANGED ioctl
Date: Sun, 23 Jan 2022 18:43:22 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0

Here's a patch that I posted also to a couple of days ago. However, I'm not sure if that is currently actively checked, so I wanted to take the opportunity of posting to this mailing list as well:

Previously get_media_changed under linux only indicated a media change for one of all concurrently requesting processes due to a shortcoming of the kernels CDROM_MEDIA_CHANGED ioctl request.

The new CDROM_TIMED_MEDIA_CHANGE ioctl introduced with Linux v5.16
now allows media change detection to work robustly for multiple processes.
This patch adapts libcdio to use this new ioctl request if compiled
against kernel v5.16 or newer. It retains the old behavior for older

Link to the patch posting on


Attachment: 0001-Multiprocess-robust-cd-change-detection.patch
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