Nicholas D Steeves posted on Wed, 25 May 2016 16:36:13 -0400 as excerpted:
> On 25 May 2016 at 15:03, Duncan <[email protected]> wrote:
>> Dmitry Katsubo posted on Wed, 25 May 2016 16:45:41 +0200 as excerpted:
>>> btrfs-restore [needs an o]ption that applies (y) to all questions
>>> (completely unattended recovery)
>>
>> That['s] a known sore spot that a lot of people have complained
>> about.
> I'm surprised no one has mentioned, in any of these discussions, what I
> believe is the standard method of providing this functionality:
> yes | btrfs-restore -options /dev/disk
Good point.
I didn't bring it up because while I've used btrfs restore a few times,
my btrfs are all on relatively small SSD partitions, so I both needed
less y's, and the total time per restore is a few minutes, not hours, so
it wasn't a big deal. As a result, while I know of yes, I didn't need to
think about automation, and as I never used it, it didn't occur to me to
suggest it for others.
Had I needed to use it, however, I expect I would have reached for yes,
myself, so good point indeed, pointing out its use to others. I just
wish I'd thought of mentioning it, now. =:^)
> And if you need it in your initrd on a Debian-like system, put the
> following in /etc/initramfs-tools/hooks/yes.hook :
>
> #!/bin/sh
>
> . /usr/share/initramfs-tools/hook-functions
>
> if command -v /usr/bin/yes >/dev/null 2>&1; then
> copy_exec /usr/bin/yes usr/bin/yes copy_exec /usr/bin/yes
> usr/bin/yes
> fi
>
> I haven't tested this, but it seems like it would do the trick.
FWIW, for those using a dracut-based initr* (which should be fedora/rh-
based distros as well as those like arch and gentoo, where it'd be an
option, the recommended option in at least gentoo's case), it's a simple
config file edit, with dracut taking care of the rest, including pulling
in libraries for non-static binaries. I've not used it for yes, but I've
used it for a few other binaries.
I use the /etc/dracut.conf.d/* style of config here, and here's what I
have in my specific installitems.conf file in that dir:
install_items+="
/bin/most
/bin/nano
"
(I don't have less, which dracut uses by default, on my system,
preferring most. And nano is a tiny but useful text editor that doesn't
require the esoteric pre-use knowledge of something like vi/vim-minimal,
tho I prefer the larger mc/mcedit in a less size constrained environment.)
Obviously I'd just need to include one more line there to pull in
/bin/yes, if I wanted/needed it. (Tho I've not checked, for all I know
dracut pulls it in on its own or via some other module I'm already using.)
--
Duncan - List replies preferred. No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master." Richard Stallman
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