On 02-07-18 23:13, Richard Purdie wrote:
On Mon, 2018-07-02 at 18:44 +0100, Alex Kiernan wrote:
On Mon, Jul 2, 2018 at 4:06 PM Alex Kiernan <[email protected]>
wrote:
On Mon, Jul 2, 2018 at 3:55 PM Mike Looijmans <mike.looijmans@topic
.nl> wrote:
The sftp-server runs fine using dropbear as SSH backend, I'd
expect the same
to be true for the client. Isn't that the case, and will the sftp
client only
work with openssh's ssh?
Interesting question... I hadn't realised dropbear didn't have an
sftp
client, but it's clearly a supported combination:
https://github.com/mkj/dropbear/blob/1656db9e58e7e8188e4ca27ae4892b
14949c56a5/dbclient.1#L159
I'll amend the patch so it depends on ssh not ${PN}-ssh since both
dropbear and openssh provide that.
Hmm... only that gets you this warning:
NOTE: Multiple providers are available for runtime ssh (dropbear,
openssh)
Consider defining a PREFERRED_RPROVIDER entry to match ssh
If you've not set it, which feels like a pretty poor upgrade
experience; I'm not sure how best to deal with that.
This is not an easy problem to solve. This is why we have the horrible
VIRTUAL-RUNTIME_* variables, I wish there were a better way...
Basically, bitbake has to have some idea which one to build, letting
the package manager decide at do_rootfs time isn't really good enough
for deterministic builds.
The dropbear/ssh choice seems to be one that is being postponed until image
creation time. There's an IMAGE_FEATURE that appears to make the choice:
IMAGE_FEATURES += "ssh-server-dropbear"
Since you're building openssh already, there's no need to instruct bitbake to
build more at package compile time.
Using RDEPENDS and PREFERRED_RPROVIDER or VIRTUAL-RUNTIME will 'break' a lot
of existing setups by installing the wrong ssh client without the engineer
knowing about it. And it will also make it impossible to build two images with
different choices. I can imaging you'd want to have a small size "recover"
image with dropbear and a large size "full" image with openssh in the same
build for the same machine and distro.
M.
Kind regards,
Mike Looijmans
System Expert
TOPIC Products
Materiaalweg 4, NL-5681 RJ Best
Postbus 440, NL-5680 AK Best
Telefoon: +31 (0) 499 33 69 79
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Website: www.topicproducts.com
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