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Add the i2c subsystem to those that create by-path links.
i2c devices may not have IDs so we can't rely on the by-id links
but they (or some of them) should at least have a path that we can use.
BPF filtering accesses fields in the netlink header that are
only filled in by libudev, never by the kernel. Therefore adding
BPF filters for kernel monitors is pointless. Even false filtering
of kernel events might be possible; at least it's hard to prove that
it can't occur.
We generally operate on the assumption that a source is "gone" as soon
as we unref it. This is generally true because we have the only reference.
But if something else holds the reference, our unref doesn't really stop
the source and it could fire again.
In particular, on_query_timeout() is called with DnsQuery* as userdata, and
it calls dns_query_stop() which invalidates that pointer. If it was ever
called again, we'd be accessing already-freed memory.
I don't see what would hold the reference. sd-event takes a temporary reference,
but on the sd_event object, not on the individual sources. And our sources
are non-floating, so there is no reference from the sd_event object to the
sources.
For #18427.
This got moved under the systemd umbrella a long time ago.
Github redirects from the old path, so the link worked, but it's
nicer to use the real location.
sockaddr_pretty() is the function that is ultimately called to print
the address, and afaics, it'll always use 0.0.0.0 if family==AF_INET.
So the test must have always been broken on systems with IPv6 support.
Fixes a failure in semaphore debian autopkgtest ci:
"65535" → ✓ 0 → "0.0.0.0:65535" (expect 0 / "[::]:65535") 15:15
Assertion 'streq(out, expected ?: in)' failed at src/test/test-socket-netlink.c:32, function test_socket_address_parse_one(). Aborting. 15:15
Fixes#17910: we didn't clearly explain that coredumps may exist without
journal entries, and vice versa.
Also, make the examples more concrete, and use '$' instead of '#' to avoid
suggesting that running as root is required. The text is extended a bit in
various places. In the description of systemd-coredump, the details of executor
separation are split out to a separate subsection, since they are rather
detailed and not necessary to understand for normal use.
It causes a regression in certain running environments (networkd under LXC),
so avoid enabling for now.
Fixes#18795
Suggested-by: Topi Miettinen <toiwoton@gmail.com>
This addresses the issue described in https://lwn.net/Articles/846403/
and makes sure we will be able to stream bytes from procfs/sysfs via
copy_bytes() if people ask us to.
