Bug#951257: udevadm: please exit nonzero with "Running in chroot, ignoring request." when /proc is not mounted

[Michael Biebl]

Am 13.02.20 um 14:03 schrieb Trent W. Buck:
> Michael Biebl wrote:
>> Am 13.02.20 um 13:29 schrieb Trent W. Buck:
>>> Packages like udisks2 run "udevadm trigger" in their postinsts.
>>> When building a Debian Live image, if /proc is mounted in the chroot, all is well.
>>> When building a Debian Live image, if /proc is NOT mounted in the chroot,
>>> udevadm gives annoying errors, and the whole build crashes.
>>>
>>> Without /proc:
>>>
>>>     root at DESKTOP-P00TKMM:/# udevadm trigger
>>>     Failed to scan devices: No such file or directory
>>
>> This means, /sys is missing, not proc afaics.
> 
> Thanks for the prompt reply.
> 
> My tests show /proc alone is enough to enable the existing "do nothing" code.
> Giving a longer excerpt from from boring-full-transcript.txt.xz:
> 
>     78root at DESKTOP-P00TKMM:/# udevadm trigger
>     Failed to scan devices: No such file or directory

You should only get this error message if /sys is not mounted.
I assume your chroot has neither /sys nor /proc mounted.


systemd-udevd.service has
ConditionPathIsReadWrite=/sys

You could try to convince upstream to add a similar check to "udevadm
trigger"

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