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Follow-up for:
https://github.com/systemd/systemd/pull/3033#discussion_r59689398
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Before we invoke now(CLOCK_BOOTTIME), let's make sure we actually have that
clock, since now() will otherwise hit an assert.
Specifically, let's refuse CLOCK_BOOTTIME early in sd-event if the kernel
doesn't actually support it.
This is a follow-up for #3037, and specifically:
https://github.com/systemd/systemd/pull/3037#issuecomment-210199167
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As discussed here:
https://github.com/systemd/systemd/issues/2619#issuecomment-184670042
Explicitly syncing /etc/machine-id after writing it, is probably a good idea,
since it has a strong "commit" character and is generally a one-time thing.
Fixes #2619.
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Previously we'd have generally useful sd-bus utilities in bust-util.h,
intermixed with code that is specifically for writing clients for PID 1,
wrapping job and unit handling. Let's split the latter out and move it into
bus-unit-util.c, to make the sources a bit short and easier to grok.
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Make this an output flag instead, so that our function prototypes can lose one
parameter
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This ports over machinectl and loginctl to also use the new GetProcesses() bus
call to show the process tree of a container or login session. This is similar
to how systemctl already has been ported over in a previous commit.
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available in the kernel
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This adds a new GetProcesses() bus call to the Unit object which returns an
array consisting of all PIDs, their process names, as well as their full cgroup
paths. This is then used by "systemctl status" to show the per-unit process
tree.
This has the benefit that the client-side no longer needs to access the
cgroupfs directly to show the process tree of a unit. Instead, it now uses this
new API, which means it also works if -H or -M are used correctly, as the
information from the specific host is used, and not the one from the local
system.
Fixes: #2945
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Nicer error message is symlinking chokes on an existing file
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Before:
$ systemctl preset getty@.service
Failed to preset unit, file /etc/systemd/system/getty.target.wants/getty@tty1.service
already exists and is a symlink to ../../../../usr/lib/systemd/system/getty@.service.
After:
$ systemctl preset getty@.service
Created symlink /etc/systemd/system/getty.target.wants/getty@tty1.service,
pointing to /usr/lib/systemd/system/getty@.service.
We don't really care where the symlink points to. For example, it might point
to /usr/lib or /etc, and systemd will always load the unit from /etc in
preference to /usr/lib. In fact, if we make a symlink like
/etc/systemd/system/multi-user.target.wants/b.service -> ../a.service, pid1
will still start b.service. The name of the symlink is the only thing that
matters, as far as systemd is concerned. For humans it's confusing when the
symlinks points to anything else than the actual unit file. At the very least,
the symlink is supposed to point to a file with the same name in some other
directory. Since we don't care where the symlink points, we can always replace
an existing symlink.
Another option I considered would be to simply leave an existing symlink in
place. That would work too, but replacing the symlink with the expected value
seems more intuitive.
Of course those considerations only apply to .wants and .requires. Symlinks
created with "link" and "alias" are a separate matter.
Fixes #3056.
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When "preset" was executed for a unit without install info, we'd warn similarly
as for "enable" and "disable". But "preset" is usually called for all units,
because the preset files are provided by the distribution, and the units are under
control of individual programs, and it's reasonable to call "preset" for all units
rather then try to do it only for the ones that can be installed.
We also don't warn about missing info for "preset-all". Thus it seems reasonable
to silently ignore units w/o install info when presetting.
(In addition, when more than one unit was specified, we'd issue the warning
only if none of them had install info. But this is probably something to fix
for enable/disable too.)
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path_kill_slashes was applied to the wrong arg...
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Fixes #1892.
Previously:
Failed to enable unit: Invalid argument
Now:
Failed to enable unit, file /etc/systemd/system/ssh.service already exists.
It would be nice to include the unit name in the message too. I looked into
this, but it would require major surgery on the whole installation logic,
because we first create a list of things to change, and then try to apply them
in a loop. To transfer the knowledge which unit was the source of each change,
the data structures would have to be extended to carry the unit name over into
the second loop. So I'm skipping this for now.
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If we not marking manager dirty when link is dirty then
the state file is not updated. This is a side effect of
issue 2850
setting CriticalConnection=yes
timesyncd NTP servers given by DHCP server are ignored.
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Kill user session scope by default
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When building without resolved and/or myhostname, test-nss.c failed to build
with
src/test/test-nss.c: In function 'main':
src/test/test-nss.c:417:32: error: 'MODULE1' undeclared (first use in this function)
NULSTR_FOREACH(module, MODULE1 MODULE2 MODULE3 MODULE4) {
^
Ensure that all MODULEx are always defined, and empty if the module is not
available (so that it will be a no-op in the string concatenation).
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zbyszek (1002)
Since: Tue 2016-04-12 23:11:46 EDT; 23min ago
State: active
Sessions: *3
Linger: yes
Unit: user-1002.slice
├─user@1002.service
│ └─init.scope
│ ├─38 /usr/lib/systemd/systemd --user
│ └─39 (sd-pam)
└─session-3.scope
├─ 31 login -- zbyszek
├─ 44 -bash
├─15076 loginctl user-status zbyszek
└─15077 less
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We enable lingering for anyone who wants this. It is still disabled by
default to avoid keeping long-running processes accidentally.
Admins might want to customize this policy on multi-user sites.
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Instead of KillOnlyUsers being a filter for KillUserProcesses, it can now be
used to specify users to kill, independently of the KillUserProcesses
setting. Having the settings orthogonal seems to make more sense. It also
makes KillOnlyUsers symmetrical to KillExcludeUsers.
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This ensures that users sessions are properly cleaned up after.
The admin can still enable or disable linger for specific users to allow
them to run processes after they log out. Doing that through the user
session is much cleaner and provides better control.
dbus daemon can now be run in the user session (with --enable-user-session,
added in 1.10.2), and most distributions opted to pick this configuration.
In the normal case it makes a lot of sense to kill remaining processes.
The exception is stuff like screen and tmux. But it's easy enough to
work around, a simple example was added to the man page in previous
commit. In the long run those services should integrate with the systemd
users session on their own.
https://bugs.freedesktop.org/show_bug.cgi?id=94508
https://github.com/systemd/systemd/issues/2900
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v2:
- fix setting of kill_user_processes and
*_ignore_inhibited settings
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SELinux outputs semi-random messages like "Unknown permission start for class
system", and the user has to dig into message metadata to find out where
they are comming from. Add a prefix to give a hint.
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This fixes #2282.
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IPv6 protocol requires a minimum MTU of 1280 bytes on the interface.
This fixes #3046.
Introduce helper link_ipv6_enabled() to figure out whether IPV6 is enabled.
Introduce network_has_static_ipv6_addresses() to find out if any static
ipv6 address configured.
If IPv6 is not configured on any interface that is SLAAC, DHCPv6 and static
IPv6 addresses not configured, then IPv6 will be automatically disabled for that
interface, that is we write "1" to /proc/sys/net/ipv6/conf//disable_ipv6.
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systemd-tmpfiles improvements, nspawn -E, honouring $TERM in pid1
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I wanted to add a config line that would empty a directory
without creating it if doesn't exist. Existing actions don't allow
this.
v2: properly add 'e' to needs_glob() and takes_ownership()
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Also don't print %m when the message already contains all the info.
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This changes the behaviour of pid1 in the following ways:
- obviously $TERM is now checked,
- $SYSTEMD_COLORS is now honoured too, before only SYSTEMD_LOG_COLORS was checked,
- isatty() is run on stdout not stderr.
As requested in #3025.
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v2:
- "=" is required, so remove the <optional> tags that v1 added
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After all it's something that we query over and over.
For example, systemctl calls colors_enabled() four times for each failing
service. The compiler is unable to optimize those calls away because they
(potentially) accesses external and global state through on_tty() and
getenv().
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No need to dump all the redundant device units on the user, just because he
specified that he wants to see units of a specific state.
This was broken by commit ebc962656cee33e3e8395f456a8208c3ca41969c.
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Another bunch of improvements to the installation code
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Don't leave temporary files if the coredump service is aborted during
the operation
Yeah, these are temporary files that systemd-coredump needs while
processing the coredumps. Of course, if the coredump service is aborted
during the operation we better shouldn't leave those files around. This
is hence a bug to fix in our coredumping code.
See https://github.com/systemd/systemd/issues/2804#issuecomment-210578147
Another option is to simply use O_TMPFILE, and when it is not available
fall back to the current behaviour. After all, the files are cleaned up
eventually, through normal tmpfiles aging, and the offending file
systems are pretty exotic these days, or not in the upstream kernel.
See https://github.com/systemd/systemd/issues/2804#issuecomment-211496707
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Keep the previous option name as hidden, for compatibility.
Fixes #3054.
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The advice string didn't talk about template units at all. Extend
it and print when trying to enable a template unit without install info.
Fixes #2345.
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-1 could be confused with -EPERM. But we still need a negative enum
value to force gcc to use int for the enum type, even though it is
unused. Otherwise we get warnings.
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Fixes #2191:
$ systemctl --root=/ enable sddm
Created symlink /etc/systemd/system/display-manager.service, pointing to /usr/lib/systemd/system/sddm.service.
$ sudo build/systemctl --root=/ enable gdm
Failed to enable unit, file /etc/systemd/system/display-manager.service already exists and is a symlink to /usr/lib/systemd/system/sddm.service.
$ sudo build/systemctl --root= enable sddm
$ sudo build/systemctl --root= enable gdm
Failed to enable unit: File /etc/systemd/system/display-manager.service already exists and is a symlink to /usr/lib/systemd/system/sddm.service.
(I tried a few different approaches to pass the error information back to the
caller. Adding a new parameter to hold the error results in a gigantic patch
and a lot of hassle to pass the args arounds. Adding this information to the
changes array is straightforward and can be more easily extended in the
future.)
In case local installation is performed, the full set of errors can be reported
and we do that. When running over dbus, only the first error is reported.
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This new feature bypasses checking if a swap partition is mounted
or if there is enough swap space available for hibernation to
succeed.
This can be useful when a system with a Solid State Disk (SSD)
has no normal swap partition or file configured, and a custom
systemd unit is used to mount a swap file just before hibernating
and unmount it just after resuming.
Signed-off-by: Vittorio Gambaletta <git-systemd@vittgam.net>
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As suggested in review of #3049.
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