This is the opposite of RegisterMachine: machined knows that the machine is
"gone", but doesn't do anything on its own. We already had TerminateMachine,
but that would stop the unit, which isn't always wanted.
These lines are generally out-of-date, incomplete and unnecessary. With
SPDX and git repository much more accurate and fine grained information
about licensing and authorship is available, hence let's drop the
per-file copyright notice. Of course, removing copyright lines of others
is problematic, hence this commit only removes my own lines and leaves
all others untouched. It might be nicer if sooner or later those could
go away too, making git the only and accurate source of authorship
information.
This part of the copyright blurb stems from the GPL use recommendations:
https://www.gnu.org/licenses/gpl-howto.en.html
The concept appears to originate in times where version control was per
file, instead of per tree, and was a way to glue the files together.
Ultimately, we nowadays don't live in that world anymore, and this
information is entirely useless anyway, as people are very welcome to
copy these files into any projects they like, and they shouldn't have to
change bits that are part of our copyright header for that.
hence, let's just get rid of this old cruft, and shorten our codebase a
bit.
Files which are installed as-is (any .service and other unit files, .conf
files, .policy files, etc), are left as is. My assumption is that SPDX
identifiers are not yet that well known, so it's better to retain the
extended header to avoid any doubt.
I also kept any copyright lines. We can probably remove them, but it'd nice to
obtain explicit acks from all involved authors before doing that.
UID/GID mapping with userns can be arbitrarily complex. Let's break this
down to a single admin-friendly parameter: let's expose the UID/GID
shift of a container via a new bus call for each container, and let's
show this as part of "machinectl status" if it is not 0.
This should work for pretty much all real-life full OS container setups
(i.e. the stuff machined is suppose to be useful for). For everything
else we generate a clean error, clarifying that we can't expose the
mapping.
This adds a bus call GetImageOSRelease() to the Manager interface that
retrieves the /etc/os-release file of a machine image. It matches the existing
GetMachineOSRelease() call, however operates on a disk image rather than a
running container.
The backend for this call on .raw images is implemented via the generalized
image dissector, which makes this scheme relatively easy to implement.
This new call returns a file descriptor for the root directory of a container.
This file descriptor may then be used to access the rest of the container's
file system, via openat() and similar calls. Since the file descriptor returned
is for the file system namespace inside of the container it may be used to
access all files of the container exactly the way the container itself would
see them. This is particularly useful for containers run directly from
loopback media, for example via systemd-nspawn's --image= switch. It also
provides access to directories such as /run of a container that are normally
not accessible to the outside of a container.
This replaces PR #2870.
Fixes: #2870
This new bus call opens an interactive shell in a container. It works
like the existing OpenLogin() call, but does not involve getty, and
instead opens an arbitrary command line.
This is similar to "systemd-run -t -M" but is controlled by a specific
PolicyKit privilege.
This should simplify the prototype a bit. The bus parameter is redundant
in most cases, and in the few where it matters it can be derived from
the message via sd_bus_message_get_bus().
This patch removes includes that are not used. The removals were found with
include-what-you-use which checks if any of the symbols from a header is
in use.
