I have an initramfs script that moves the root filesystem to btrfs subvolume on first boot.  This breaks the expand-last-partition.sh script for the oddest reason:<div><br /></div><div>line 4:  <b>findmnt / -o source -n</b></div><div><b><br /></b></div><div>normally this line outputs something like: <b>/dev/name</b>,</div><div>but when on a btrfs subvolume, it outputs: <b>/dev/name[@subvol] </b></div><div><b><br /></b></div><div>This leads to the error: "<b>Boot device equals root device - no partitioning found"</b></div><div>not exactly sure why, as I didn't dissect every line. I found that changing the command in line 4 to: <b>findmnt / -o sources -n</b> </div><div>fixed the problem... I tried this after I noticed running <b>findmnt / --output-all</b>, the device name alone was listed under SOURCES, where SOURCE had the subvol appended.</div><div><br /></div><div>I don't really <i>like</i> this solution, partly because 1) an ubuntu installation I have doesn't even have the <b>sources</b> output (though it was added 3 years ago, see: https://github.com/util-linux/util-linux/blame/master/misc-utils/findmnt.c#L135 )... but mainly because I don't know exactly what this will look like for other device / filesystem types.</div><div><br /></div><div>maybe we could add a sed expression to trim past the device name?  i.e.  </div><div><br /></div><div><b>findmnt / -o source -n | sed 's, [\[.*]*,,' </b></div><div><b><br /></b></div><div>thoughts?</div><div><br /></div><div>thanks,</div><div>   Stephen</div>











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