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Use varlink to detect networkd's network namespace when executing
networkctl rather than the D-Bus interface.
Signed-off-by: Matt Layher <mdlayher@gmail.com>
These are unused or used in the same order. So, this patch does not
change any behavior, just for naming consistency with the function
prototype.
Closes#30570.
Let's get networkd onto Varlink. This only adds the most basic of
operations.
I'd love to see networkd do Varlink for all its basic operations so that
networkctl can use that, and work correctly before D-Bus is up. Right
now, many of networkctls calls simply don't work before D-Bus, and I'd
like to see that improved.
We cannot determine the SELinux label ahead of time if RootImage= is
used, since we'd have to mount the image then, hence don't, and handle
this cleanly, and gracefully.
While we are at it, stop "reaching over" so much from the socket code to
the service code, and instead provide function that most of the hard
work in service.c that socket.c just calls.
While we are at it, add debug logging and stuff.
I noticed the issue when also noticing #30560, but that one is harder to
fix, hence I avoided it for now.
This simplifies bus_verify_polkit_async() and related calls quite a bit:
1. This removes any support for authentication-by-Linux-capability. This
is ultimately a kdbus leftover: with classic AF_UNIX transports we
cannot authenticate by capabilities securely (because we cannot
acquire it from the peer without races), hence we never actually did.
Since the necessary kernel work didn't materialize in the last 10y,
and is unlikely to be added, let's just kill this context. We cannot
quite remove the caps stuff from sd-bus for API compat, but for our
polkit logic let's kill it.
2. The "good_uid" and "interactive" params are only necessary in very
few cases, hence let's move them to a new call
bus_verify_polkit_async_full() and make bus_verify_polkit_async() a
wrapper around it without those two parameters.
This also fixes a bunch of wrong uses of the "interactive" bool. The
bool makes no sense today as the ALLOW_INTERACTIVE_AUTHORIZATION field
in the D-Bus message header replaces it fully. We only need it to
implement method calls we introduced prior to that header field becoming
available in D-Bus. And it should only be used on such old method calls,
and otherwise always be set to false.
This does not change behaviour in any way. Just simplifies stuff.
Fixes: #21586
This adds a new --background= switch that allows specifiying a
background color for the terminal while the tool runs.
It also teaches the tool when invoked as uid0 to tint the terminal in a
reddish hue when operating as root, and in a yellowish hue when
operating as any other user.
This should highlight nicely when the user is operating with elevated
privileges, or changed privileges.
As the bytes flow through our terminal forwarder we can color the
background of the terminal with a color of our choices, if that's
desired.
This will later allow us to color the background of the uid0 tool when
running as root with a slightly alarming red color.
This does two things:
1. When an ANSI sequence is seen that resets the background color, it is
extended to immediately set the color to our choice.
2. When a newline is seen it is immeidately extended to set the
background color again and clear the current line till the end.
Net effect: all lines written while we forward the ttys will be shown
with the background color of choice.
This turns "systemd-run" into a multi-call binary. When invoked under
the name "uid0", then it behaves a bit more like traditional "sudo".
This mostly means defaults appropriuate for that, for example a PAM
stack, interactivity and more.
Fixes: #29199
