Same as the sd_pid_* counterparts, but take a pid file descriptor instead of
a pid, so that the callers can be sure that the returned values are really
about the process they asked for, and not about a recycled PID.
This renames systemd-boot-system-token.service to
systemd-boot-random-seed.service and conditions it less strictly.
Previously, the job of the service was to write a "system token" EFI
variable if it was missing. It called "bootctl --graceful random-seed"
for that. With this change we condition it more liberally: instead of
calling it only when the "system token" EFI variable isn't set, we call
it whenever a boot loader interface compatible boot loader is used. This
means, previously it was invoked on the first boot only: now it is
invoked at every boot.
This doesn#t change the command that is invoked. That's because
previously already the "bootctl --graceful random-seed" did two things:
set the system token if not set yet *and* refresh the random seed in the
ESP. Previousy we put the focus on the former, now we shift the focus to
the latter.
With this simple change we can replace the logic
f913c784ad added, but from a service that
can run much later and doesn't keep the ESP pinned.
Systemd documents "halt" as the primary shutdown mechanism, redirecting
"reboot" and "shutdown" to the halt(8), but halt is a really strange and
obsolete concept. Who would want to really keep their machine running after
shutdown? I expect that halting is almost unused. Let's at least make it less
prominent in the docs.
While at it, use "power off" for a verb and "power-off" for noun (but "poweroff"
of the actual command name).
This adds two more phases to the PCR boot phase logic: "sysinit" +
"final".
The "sysinit" one is placed between sysinit.target and basic.target.
It's good to have a milestone in this place, since this is after all
file systems/LUKS volumes are in place (which sooner or later should
result in measurements of their own) and before services are started
(where we should be able to rely on them to be complete).
This is particularly useful to make certain secrets available for
mounting secondary file systems, but making them unavailable later.
This breaks API in a way (as measurements during runtime will change),
but given that the pcrphase stuff wasn't realeased yet should be OK.
In many (most?) of our event loops we want to exit once SIGTERM/SIGINT
is seen. Add a common helper for that, that does the right things in a
single call.
So far we expected callers to block the signals manually. Which is
usually a good idea, since they should do that before forking off
threads and similar. But let's add a mode where we automatically block
it for the caller, to simplify things.
For now, this simply outputs the PCR hash values expected for a kernel
image, if it's measured like sd-stub would do it.
(Later on, we can extend the tool, to optionally sign these
pre-calculated measurements, in order to implement signed PCR policies
for disk encryption.)
We got documentation for sd-device for the first time with
b51f4eaf7b, so let's celebrate by adding a
landing page that also explains the relationship with libudev.
So, typically systemd-boot is referenced as sd-boot, due to te usual
shorter naming in ESP resources. systemd-stub didnt do that so far,
since it never appears as separate files in the ESP. However it's super
annoying that you can find "man sd-boot", but not the very closely
related "man sd-stub". Let's fix that, and also add an "sd-stub" alias
to the "systemd-stub" man page.
A description of SD_BUS_VTABLE_CAPABILITY is added, and the discussion
on SD_BUS_VTABLE_UNPRIVILEGED in expanded. I think it would be nice
to add longer description of how access is checked (maybe in sd-bus(3)),
but I'm leaving that for later. I think the text that was added here
describes everything, even if tersely.
Fixes#21882.
We expose various other forms of UUID helpers already, i.e.
SD_ID128_UUID_FORMAT_STR and SD_ID128_MAKE_UUID_STR(), and we parse
UUIDs, hence add a high-level helper for formatting UUIDs too.
This doesn't add any new code, it just moves some helpers
id128-util.[ch] → sd-id128.[ch], to make them public.
