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Add `ProtectClock=yes` to systemd units. Since it implies certain
`DeviceAllow=` rules, make sure that the units have `DeviceAllow=` rules so
they are still able to access other devices. Exclude timesyncd and timedated.
A warning is emitted from sd_bus_message_{get,set}_priority. Those functions
are exposed by pystemd, so we have no easy way of checking if anything is
calling them.
Just making the functions always return without doing anything would be an
option, but then we could leave the caller with an undefined variable. So I
think it's better to make the functions emit a warnings and return priority=0
in the get operation.
Right now the kernel will not dump anything that went through setuid or
setgid. But it is routine for daemons to do that, and it makes things hard to
debug.
systemd-coredump saves the coredump readable by the users the process was
running as. This should be enough to avoid information leakage. So let's also
tell the kernel to do the coredump.
For https://bugzilla.redhat.com/show_bug.cgi?id=1790972.
Both patterns are stored in the same file, so they are enabled or disabled
together. (Though suid_dumpable=2 is supposed to be safe even when writing to
plain files.)
For whatever reason, this does not get rendered propely in the man
page and results in an invalid code:
W: manual-page-warning /usr/share/man/man7/systemd.special.7.gz 103: warning: macro `AQ' not defined
We say 'user manager' and 'system manager' in most other places, so let's just
use this form here too.
Many of the convenience functions from sd-bus operate on verbose sets
of discrete strings for destination/path/interface/member.
For most callers, destination/path/interface are uniform, and just the
member is distinct.
This commit introduces a new struct encapsulating the
destination/path/interface pointers called BusAddress, and wrapper
functions which take a BusAddress* instead of three strings, and just
pass the encapsulated strings on to the sd-bus convenience functions.
Future commits will update call sites to use these helpers throwing
out a bunch of repetitious destination/path/interface strings littered
throughout the codebase, replacing them with some appropriately named
static structs passed by pointer to these new helpers.
From https://github.com/microsoft/WSL/issues/423#issuecomment-221627364:
> it's unlikely we'll change it to something that doesn't contain "Microsoft"
> or "WSL".
... but well, it happened. If they change it incompatibly w/o adding an stable
detection mechanism, I think we should not add yet another detection method.
But adding a different casing of "microsoft" is not a very big step, so let's
do that.
Follow-up for #11932.
On certain distributions such as NixOS the mtime of `/etc/hosts` is
locked to a fixed value. In such cases, only checking the last mtime of
`/etc/hosts` is not enough - we also need to check if the st_ino/st_dev
match up. Thus, let's make sure make sure that systemd-resolved also
rereads `/etc/hosts` if the inode or the device containing `/etc/hosts` changes.
Test script:
```bash
hosts="/etc/hosts"
echo "127.0.0.1 testpr" > "hosts_new"
mv "hosts_new" "$hosts"
resolvectl query testpr || exit 1
mtime="$(stat -c %y "$hosts")"
echo "127.0.0.1 newhost" > "hosts_tmp"
touch -d "$mtime" "hosts_tmp"
install -p "hosts_tmp" "$hosts"
sleep 10
resolvectl query newhost || exit 1
rm -f "hosts_tmp"
```
Closes#14456.
This reverts commit 7e1ed1f3b2.
systemd-repart is not a user service that should be something people
enable/disable, instead it should just work if there's configuration for
it. It's like systemd-tmpfiles, systemd-sysusers, systemd-load-modules,
systemd-binfmt, systemd-systemd-sysctl which are NOPs if they have no
configuration, and thus don't hurt, but cannot be disabled since they
are too deep part of the OS.
This doesn't mean people couldn't disable the service if they really
want to, there's after all "systemctl mask" and build-time disabling,
but those are OS developer facing instead of admin facing, that's how it
should be.
Note that systemd-repart is in particular an initrd service, and so far
enable/disable state of those is not managed anyway via "systemctl
enable/disable" but more what dracut decides to package up and what not.
split() and FOREACH_WORD really should die, and everything be moved to
extract_first_word() and friends, but let's at least make sure that for
the remaining code using it we can't deadlock by not progressing in the
word iteration.
Fixes: #15305
Merging by hand because github refuses merging because "Rebasing the commits of
this branch on top of the base branch cannot be performed automatically as this
would create a different result than a regular merge.".
Consumers of the sd-bus convenience API can't make convenience
helpers of their own without va_list variants.
This commit is a mechanical change splitting out the existing function
bodies into bare va_list variants having a 'v' suffixed to the names.
The original functions now simply create the va_list before forwarding
the call on to the va_list variant, and the va_list variants dispense
with those steps.
The function sd_device_get_property_value has some paths where it exits without
touching the n pointer. In those cases, n remained uninitialized until it was
eventually read inside isempty where it caused the segmentation fault.
Fixes#15078
For now, this function is nearly equivalent to the si_uint64 parser, except for
an additional range check as Linux only takes 32-bit values as bitrates. In
future, this may also be used to introduce fancier bitrate config formats.
