On Nov 11, 2013, at 12:35 PM, Nathan Whitehorn wrote: > On 11/11/13 14:30, Teske, Devin wrote: >> (disabling default gpg-signing until they fix a bug with the quoting) >> >> On Nov 11, 2013, at 11:46 AM, Michael Dexter wrote: >> >>> Hello all, >>> >>> I have been experimenting with various BSD and GNU/Linux boot media >>> under bhyve and noticed that we may want to accommodate the "LiveCD" >>> mode of the installer, which in turn requires the correct console. >>> >>> Currently, one is prompted for VT100 for installation but this does not >>> appear to work/stick for LiveCD mode. >>> >>> Can anyone verify this? >>> >> Sorry, I mistook your issue in the previous e-mail to be on-going with the >> thread it was inline with. >> >> "LiveCD" changes things a bit. >> >> (thinks) >> >> I would expect that a prompt could do: >> >> 1. modify /etc/ttys on the boot media >> 2. run "init q" >> >> But there's a couple of assumptions... >> >> 3. Can we even write to /etc/ttys? >> NB: We can write to /tmp because it's an md0 swap device >> >> So do we have to get fancy with slipping a unionfs layer backed by another >> md swap device above the root? >> >> That would make every file on the boot media writable (writes would go to >> the swap-backed md device and if you execute "rm -fW file" you can get back >> files that have been previously unlinked -- unlinks are stored as whiteouts in >> the swap backed md device). For all intents and purposes, the read-only file- >> system becomes writable and we could then munge /etc/ttys to enable serial >> only when a menu item is chosen. >> >> If I'm off-base, let me know... sounds like a lot of trouble. >> >> The alternative being that you enable serial by default but then I have to tell >> field engineers to unplug barcode readers before they do an install??? (that's >> a question, it may be entirely safe, but I've never tried, seems unsafe) >> >> Question is, how would you disable it? Goes back to writable filesystem. > > This is why I don't think we want to modify /etc/ttys. Instead we want to have init do the right thing (follow the boot console) with a single unchanged /etc/ttys. Let me see if I've got it right... Already-knowns: + The boot variables are influenced by loader.conf which is read-only media. + But Michael is loading the media from bhyve. Question: Does bhyve set kern.console irrespective of loader.conf values? If so, then yeah... I'm all for supporting your stated Option-A in the other thread. -- Devin _____________ The information contained in this message is proprietary and/or confidential. If you are not the intended recipient, please: (i) delete the message and all copies; (ii) do not disclose, distribute or use the message in any manner; and (iii) notify the sender immediately. In addition, please be aware that any message addressed to our domain is subject to archiving and review by persons other than the intended recipient. Thank you.Received on Mon Nov 11 2013 - 19:42:04 UTC
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