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We already synthesize records for both "root" and "nobody" in
nss-systemd. Let's do the same in our own NSS wrappers that are supposed
to bypass NSS if possible. Previously this was done for "root" only, but
let's clean this up, and do the same for "nobody" too, so that we
synthesize records the same way everywhere, regardless whether in NSS or
internally.
Instead of contacting PID 1 for dynamic UID/GID lookups for all
UIDs/GIDs that do not qualify as "system" do the more precise check
instead: check if they actually qualify for the "dynamic" range.
This adds uid_is_system() and gid_is_system(), similar in style to
uid_is_dynamic(). That a helper like this is useful is illustrated by
the fact that test-condition.c didn't get the check right so far, which
this patch fixes.
The loop preparation and part of the loop contents are actually the
same, let's merge this.
Also, it's so much fun tweaking around in the name_to_handle_at() code,
let's do more of it with this patch!
(This also adds two NULL assignments, that aren't strictly necessary.
However, I figured its safer to place them in there, just in case the
for() condition is changed later. After all the freeing of the handle
and the invalidation of the cleanup-controller pointer to it are
otherwise really far away from each other...)
Before this CPUAffinity= requires a valid cpu set, and the setting
cannot be reset. Moreover, if CPUAffinity= with empty string is passed,
then message container is closed without no values appended, thus
we get error.
This makes CPUAffinity= accepts empty string to reset the setting
and avoid error.
Otherwise people might assume that systemd was installed in the $PATH,
but it is not. Do the same as for systemd-vconsole-setup.service and
friends: let's include the full path in the man page.
Apparently there's no guarantee that EPOLLIN is immediately propagated
from a pty slave to the master when data is written to it, hence it's
not sufficient to check EPOLLIN to decide whether the pty device is
drained.
Let's fix this by asking the kernel directly through SIOCINQ + SIOCOUTQ,
if there's anything buffered left.
Fixes: #7531
An auto-restarted unit B may depend on unit A with StopWhenUnneeded=yes.
If A stops before B's restart timeout expires, it'll be started again as part
of B's dependent jobs. However, if stopping takes longer than the timeout, B's
running stop job collides start job which also cancels B's start job. Result is
that neither A or B are active.
Currently, when a service with automatic restarting fails, it transitions
through following states:
1) SERVICE_FAILED or SERVICE_DEAD to indicate the failure,
2) SERVICE_AUTO_RESTART while restart timer is running.
The StopWhenUnneeded= check takes place in service_enter_dead between the two
state mentioned above. We temporarily store the auto restart flag to query it
during the check. Because we don't return control to the main event loop, this
new service unit flag needn't be serialized.
This patch prevents the pathologic situation when the service with Restart=
won't restart automatically. As a side effect it also avoid restarting the
dependency unit with StopWhenUnneeded=yes.
Fixes: #7377
It is redundant because in these cases the values in
`net.ipv4.conf.all.*` take precedence. Also, setting the `default` does
nothing for devices that already exist.
This adds missing options, mainly '--version' in getopt(), removes
an unused option from getopt().
Also, this adds a deprecate message in `udevadm hwdb`, and cleanups
help messages.
Follow-up for 65eb4378c3.
Apparently there are a myriad of netcat implementations around, and they
all behave slightly differently. The one I have on my Fedora 27
installation will cause a failure when invoked as "nc -U" on an AF_UNIX
socket whose connections are immediately disconnected, thus causing the
test to fail.
Let's avoid all ambiguities in this regard, and drop usage of netcat
altoegther. Instead let's use a FIFO in the file system, which we can
connect to with only shell commands, and is hence much simpler and
more reliable to test with.
The actual test is supposed to validate that PID 1 doesn't hang when
activation of a socket-activated service fails, hence which transport
mechanism is used ultimately doesn't matter, as long as we activate the
service, and we do here...
If user namespacing is used, let's make sure that the root user in the
container gets access to both /sys/fs/cgroup/systemd and
/sys/fs/cgroup/unified.
This matches similar logic in cg_set_access().
In -U mode we might need to re-chown() all files and directories to
match the UID shift we want for the image. That's problematic on fat
partitions, such as the ESP (and which is generated by mkosi's
--bootable switch), because fat of course knows no UID/GID file
ownership natively.
With this change we take benefit of the uid= and gid= mount options FAT
knows: instead of chown()ing all files and directories we can just
specify the right UID/GID to use at mount time.
This beefs up the image dissection logic in two ways:
1. First of all support for mounting relevant file systems with
uid=/gid= is added: when a UID is specified during mount it is used for
all applicable file systems.
2. Secondly, two new mount flags are added:
DISSECT_IMAGE_MOUNT_ROOT_ONLY and DISSECT_IMAGE_MOUNT_NON_ROOT_ONLY.
If one is specified the mount routine will either only mount the root
partition of an image, or all partitions except the root partition.
This is used by nspawn: first the root partition is mounted, so that
we can determine the UID shift in use so far, based on ownership of
the image's root directory. Then, we mount the remaining partitions
in a second go, this time with the right UID/GID information.
This adds a new flavour of strextend(), called
strextend_with_separator(), which takes an optional separator string. If
specified, the separator is inserted between each appended string, as
well as before the first one, but only if the original string was
non-empty.
This new call is particularly useful when appending new options to mount
option strings and suchlike, which need to be comma-separated, and
initially start out from an empty string.
Also, add "cgroups.stat". It's read-only anyway, hence its UID/GID
ownership matters little, but it's probably a good idea to keep it
ownership in sync with the other read-only files such as
"cgroups.controllers".
Also, order the list of files alphabetically.
If we operate on a disk image (i.e. --image=) then it's pointless to
look into the mount directory before it is actually mounted to see which
systemd version is running inside...
Unfortunately we only mount the disk image in the child process, but the
parent needs to know the cgroup mode, hence add some IPC for this
purpose and communicate the cgroup mode determined from the image back
to the parent.
