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Using these IDs for message identication is one use case, but there are
others, hence let's drop the prefix, it only made sense to have while
the tool was part of journalctl.
For some unrelated stuff I wanted the machine ID in UUID format, and it
was annoying doing that manually. So let's add a switch for this, so
that this works:
systemd-id128 machine-id -u
This structure of the man page originates from the time when systemd was
installed on top of sysvinit systems, and users had an actual chance to
interact with the systemd binary directly. Nowadays it is almost never called
directly, so let's properly explain this in the overview.
The Options section is moved down below the kernel command line, those options
are only needed in special circumstances. Let's refer the reader to the
description of the kernel command line options, and not duplicate the
descriptions (which makes the text longer than necessary and increases chances
for discrepancies).
Systemd is also prominently used as the user manager, let's mention that in the
Overview.
While at it, use "=" only when an argument is required as we nowadays do.
It was only described in systemd(1), making it hard to discover.
Fixes#13561.
The same for $SYSTEMD_URLIFY.
I think all the tools whose man pages include less-variables.xml support
those variables.
There is no change in the file right now, but the download seems to work
OK.
It's funny that the biggest company in the world cannot provide a
download link in plain text.
This makes the ask-password agent handling more alike the polkit agent
handling again, and introduces ask_password_agent_open_if_enabled() that
works just like the already existing polkit_agent_open_if_enabled().
The commit:
a3fc6b55ac nspawn: mask out CAP_NET_ADMIN again if settings file turns off private networking
turned off the CAP_NET_ADMIN capability whenever no private networking
feature was enabled. This broke configurations where the CAP_NET_ADMIN
capability was explicitly requested in the configuration.
Changing the order of evalution here to allow the Capability= setting
to overrule this implicit setting:
Order of evaluation:
1. if no private network setting is enabled, CAP_NET_ADMIN is removed
2. if a private network setting is enabled, CAP_NET_ADMIN is added
3. the settings of Capability= are added
4. the settings of DropCapability= are removed
This allows the fix for #11755 to be retained and to still allow the
admin to specify CAP_NET_ADMIN as additional capability.
Fixes: a3fc6b55acd3f37e50915304d87bed100efa9d9d
Fixes: #13995
We set ProtectKernelLogs=yes on all long running services except for
udevd, since it accesses /dev/kmsg, and journald, since it calls syslog
and accesses /dev/kmsg.
If we fail to start polkit, we get a message like
"org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate remote peer.",
which has no meaning for the caller of our StartUnit method. Let's just
return -EACCES.
$ systemctl start apache
Failed to start apache.service: Could not activate remote peer. (before)
Failed to start apache.service: Access denied (after)
Fixes#13865.
We would only write to the field, and take the address. All *readers* were
removed in 284149392755f086d0a714071c33aa609e61505e. (The explanation for why
the field wasn't removed back then is that the patch underwent a few iterations,
with the initial version adding translation back and forth. Later versions of
the patch simply emit a warning and ignore the old value. Apparently nobody
noticed that the value became unused.)
We allow expressing configuration as a fraction with granularity of 0.001, but
when writing out the unit file, we'd round that up to 0.01.
Longer term, I think it'd be nicer to simply use floats and do away with
arbitrary restrictions on precision.
TasksMax= and DefaultTasksMax= can be specified as percentages. We don't
actually document of what the percentage is relative to, but the implementation
uses the smallest of /proc/sys/kernel/pid_max, /proc/sys/kernel/threads-max,
and /sys/fs/cgroup/pids.max (when present). When the value is a percentage,
we immediately convert it to an absolute value. If the limit later changes
(which can happen e.g. when systemd-sysctl runs), the absolute value becomes
outdated.
So let's store either the percentage or absolute value, whatever was specified,
and only convert to an absolute value when the value is used. For example, when
starting a unit, the absolute value will be calculated when the cgroup for
the unit is created.
Fixes#13419.
