[SOLVED] Moving /etc/udev/hwdb.bin BLOB to /var/lib/udev/

opty · 03-27-2021, 05:46 AM

What about moving /etc/udev/hwdb.bin BLOB to /var/lib/udev/?

It seems to get created on every boot again...

gmgf · 03-27-2021, 06:22 AM

Is in /lib/udev/hwdb.d/ now, probably it's just useless

opty · 03-27-2021, 06:36 AM

See udev(7):

Quote:

The content of all hwdb files is read by udevadm(8) and compiled to a binary database located at /etc/udev/hwdb.bin, or alternatively /usr/lib/udev/hwdb.bin if you want ship the compiled database in an immutable image. During runtime only the binary database is used.

gmgf · 03-27-2021, 07:08 AM

Quote:

Originally Posted by opty

See udev(7):

Sorry i confused, hwdb.d and hwdb.bin.

opty · 03-28-2021, 07:09 AM

Code:

opty@qeporkak:~$ sudo du -hbd 1 /etc/ | sort -nr | head -3
23919468        /etc/
8271280 /etc/udev
7835002 /etc/file

bassmadrigal · 03-30-2021, 11:07 PM

Quote:

Originally Posted by opty

See udev(7):

Quote:

The content of all hwdb files is read by udevadm(8) and compiled to a binary database located at /etc/udev/hwdb.bin, or alternatively /usr/lib/udev/hwdb.bin if you want ship the compiled database in an immutable image. During runtime only the binary database is used.

Seems the default from upstream is to have it in /etc/udev/hwdb.bin (since Slackware isn't shipped with the expectation of it being an immutable image). I don't think that moving it to simply keep it out of /etc/ is worth deviating from upstream.

It also seems it's been requested for upstream to change the location, but upstream determined that /etc/ is still the best place for it since /var/ isn't guaranteed to be there:

Quote:

It's unfortunate, but there is currently no better place than /etc. It is
dynamically created data, including config from /etc.

/lib must not be used for that type of data.

It would belong into /var, but that might not be availble.

It's the same reason the ld.so.cache is in /etc.

I'm closing this bug, because we don't have any better idea than what
we currentllyi do.

SOURCE: https://bugs.freedesktop.org/show_bug.cgi?id=67553#c2

opty · 03-31-2021, 10:22 AM

Now that you mention it, I probably remember that. I should have remembered much earlier. :-/

I guess I just have to continue using rsync --exclude=/etc/udev/hwdb.bin.