pygrub

[Hauke Fath <hf%spg.tu-darmstadt.de@localhost>]

Hi,

while virtualizing a bare-metal Debian 11 installation, and bringíng it 
up as PV DomU on a NetBSD 9 Dom0 (xen 4.13), I went on a surprising 
detour.

The Dom0 has limited hardware resources, because why not. pygrub, OTOH, 
decided it wants a copy of the linux ramdisk in, wait for it, 
/var/run/xen, where /var/run was originally a 10 GB tempfs. It didn't 
help that the error message ("Error writing temporary copy of 
<whatever>") neglected* to mention _where_ it wanted to write to.

I would suggest to amend the error message, and maybe default to a 
directory better suited for 60 MB blobs ($VARBASE/spool/xen ?).

Cheerio,
Hauke


* Python's way appears to be "why come up with a meaningful error 
message, when you can print a stack trace?"

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