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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 7e1ed1f3b29162df25064b33dc55ac8cf432bb0b.
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.
sd_bus_reply_method_errno already does the same two checks
(sd_bus_error_is_set(error), r < 0) internally. But it did them in opposite
order. The effect is the same, because sd_bus_reply_method_errno falls back to
sd_bus_reply_method_error, but it seems inelegant. So let's simplify
bus_maybe_reply_error() to offload the job fully to sd_bus_reply_method_errno().
No functional change.
Some fdopendir() calls remain where safe_close() is manually
performed, those could be simplified as well by converting to
use the _cleanup_close_ machinery, but makes things less trivial
to review so left for a future cleanup.
With the addition of _cleanup_close_ there's a repetitious
pattern of assigning -1 to the fd after a successful fdopen
to prevent its close on cleanup now that the FILE * owns the
fd.
This introduces a wrapper that instead takes a pointer to the
fd being opened, and always overwrites the fd with -1 on success.
A future commit will cleanup all the fdopen call sites to use the
wrapper and elide the manual -1 fd assignment.
