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sd-bus generally exposes bools as "int" instead of "bool" in the public API.
This is relevant when unmarshaling booleans, as the relevant functions expect
an int* pointer and no bool* pointer. Since sizeof(bool) is not necessarily the
same as sizeof(int) this is problematic and might result in memory corruption.
Let's fix this, and make sure bus_map_all_properties() handles booleans as
ints, as the rest of sd-bus, and make all users of it expect the right thing.
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restarts
Let's make sure that all settings pushed in stay around when systemd-resolved
is restarted.
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It's like set_put_strdup(), but splits up a string via an extract_first_word()
loop.
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It's weird having a "negative" function link_is_unmanaged(), let's invert it
and get rid of the negation this way, by renaming it to link_is_managed().
Internally we stored this as a positive boolean already, hence let's do this
for the function too.
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Let's split the code from the inner loop out, into its own function
link_update_dns_server_one(). This matches how things are already handled for
the search domain logic. Also, this is preparation for a later commit that
persists DNS server data pushed in via the bus.
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After all, /etc/resolv.conf doesn't know the concept of "route-only domains",
hence the domains should really not appear there.
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NULL strings nicely
xyz_from_string() functions defined with DEFINE_STRING_TABLE_LOOKUP() properly
handle NULL strings already. make sure the equivalent functions defined with
DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN() do the same.
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The new command shows the per-link and global DNS configuration currently in
effect. This is useful to quickly see the DNS settings resolved acquired from
networkd and that was pushed into it via the bus APIs.
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Internally, we store the per-link DNSSEC setting as -1 (invalid) if there's no
link-specific setting configured, and the global setting should be used. When
exporting this one the bus we really should export the effective DNSSEC
setting however, i.e. return the global one if there's non set per-link.
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We export them per-link, hence let's export the global NTAs too.
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Jun 16 05:12:08 systemd[1]: Controller 'io' supported: yes
Jun 16 05:12:08 systemd[1]: Controller 'memory' supported: yes
Jun 16 05:12:08 systemd[1]: Controller 'pids' supported: yes
instead of
Jun 16 04:06:50 systemd[1]: Controller 'memory' supported: yes
Jun 16 04:06:50 systemd[1]: Controller 'devices' supported: yes
Jun 16 04:06:50 systemd[1]: Controller 'pids' supported: yes
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See https://github.com/systemd/systemd/pull/3555#issuecomment-226564908
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Fixes:
==27917== 3 bytes in 1 blocks are definitely lost in loss record 1 of 1
==27917== at 0x4C28BF6: malloc (vg_replace_malloc.c:299)
==27917== by 0x55083D9: strdup (in /usr/lib64/libc-2.22.so)
==27917== by 0x1140DA: find_converted_keymap (keymap-util.c:524)
==27917== by 0x110844: test_find_converted_keymap (test-keymap-util.c:52)
==27917== by 0x1124FE: main (test-keymap-util.c:213)
==27917==
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Delete the dbus1 generator and some critical wiring. This prevents
kdbus from being loaded or detected. As such, it will never be used,
even if the user still has a useful kdbus module loaded on their system.
Sort of fixes #3480. Not really, but it's better than the current state.
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See:
https://github.com/systemd/systemd/pull/3529#issuecomment-226421007
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Systemctl fixes
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(#3553)
dns_transaction_maybe_restart() is supposed to return 1 if the the transaction
has been restarted and 0 otherwise. dns_transaction_process_dnssec() relies on
this behaviour. Before this change in case of restart we'd call
dns_transaction_go() when restarting the lookup, returning its return value
unmodified. This is wrong however, as that function returns 1 if the
transaction is pending, and 0 if it completed immediately, which is a very
different set of return values. Fix this, by always returning 1 on redirection.
The wrong return value resulted in all kinds of bad memory accesses as we might
continue processing a transaction that was redirected and completed immediately
(and thus freed).
This patch also adds comments to the two functions to clarify the return values
for the future.
Most likely fixes: #2942 #3475 #3484
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In https://github.com/systemd/systemd/issues/3543, we would open the pager
before starting ssh, and the pipe fd was "leaked" into the ssh child as the
stderr fd. Previous commit fixes bus-socket to nullify stderr before launching
the child, but it seems reasonable to also delay starting the pager.
If we are going to croak when trying to open the transport, it seems better
to do this before starting the pager.
This commit would also fix #3543 on its own.
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the pager (#3550)
If "systemctl -H" is used, let's make sure we first terminate the bus
connection, and only then close the pager. If done in this order ssh will get
an EOF on stdin (as we speak D-Bus through ssh's stdin/stdout), and then
terminate. This makes sure the standard error we were invoked on is released by
ssh, and only that makes sure we don't deadlock on the pager which waits for
all clients closing its input pipe.
(Similar fixes for the various other xyzctl tools that support both pagers and
-H)
Fixes: #3543
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networkd: add support for vrf interfaces (#3316)
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various changes, most importantly regarding memory metrics
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Permit services to detect whether their stdout/stderr is connected to the journal.
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If for whatever reason the file system is "corrupted", we want
to be resilient and ignore the error, as long as we can load the units
from a different place.
Arch bug https://bugs.archlinux.org/task/49547.
A user had an ntfs symlink (essentially a file) instead of a directory after
restoring from backup. We should just ignore that like we would treat a missing
directory, for general resiliency.
We should treat permission errors similarly. For example an unreadable
/usr/local/lib directory would prevent (user) instances of systemd from
loading any units. It seems better to continue.
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executed services
This permits services to detect whether their stdout/stderr is connected to the
journal, and if so talk to the journal directly, thus permitting carrying of
metadata.
As requested by the gtk folks: #2473
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When running systemctl from git on systemd from systemd-229-8.fc24.x86_64,
ListUnitsByPatterns results in org.freedesktop.DBus.Error.AccessDenied.
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Second attempt had no effect anyway.
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buffer (#3541)
Calling recv with a NULL buffer returns EFAULT instead of EOPNOTSUPP on
older kernels (3.14).
Fixes #3407
Signed-off-by: Kai Ruhnau <kai.ruhnau@target-sg.com>
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three resolved fixes
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Super-important change, yeah!
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This reworks get_process_cmdline() quite substantially, fixing the following:
- Fixes:
https://github.com/systemd/systemd/pull/3512/commits/a4e3bf4d7ac2de51191ce136ee9361ba319e106c#r66837630
- The passed max_length is also applied to the "comm" name, if comm_fallback is
set.
- The right thing happens if max_length == 1 is specified
- when the cmdline "foobar" is abbreviated to 6 characters the result is not
"foobar" instead of "foo...".
- trailing whitespace are removed before the ... suffix is appended. The 7
character abbreviation of "foo barz" is hence "foo..." instead of "foo ...".
- leading whitespace are suppressed from the cmdline
- a comprehensive test case is added
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When we get a literal IP address as string that includes a zone suffix, process
this properly and return the parsed ifindex back to the client, and include it
in the canonical name in case of a link-local IP address.
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Previously, after checking the local zone for a reply and finding one we'd not
initialize the answer ifindex from that. Let's fix that.
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We can reuse some code here, so let's do it.
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Fix-up for 2a9a6f8ac04a69ca36d645f9305a33645f22a22b
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Apparently newer gcc versions are a bit more forgiving when assigning an
"unsigned char*" pointer to something of a different type. Let's add the
missing cast so that old gcc versions are fine, too.
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The unit files already accept relative, percent-based memory limit
specification, let's make sure "systemctl set-property" support this too.
Since we want the physical memory size of the destination machine to apply we
pass the percentage in a new set of properties that only exist for this
purpose, and can only be set.
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The various bits of code did the scaling all different, let's unify this,
given that the code is not trivial.
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THe latter is a kernelism, we only understand "infinity".
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When parsing unit files we already refuse unit memory limits of zero, let's
also refuse it when the value is set via the bus.
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settings
If a percentage is used, it is taken relative to the installed RAM size. This
should make it easier to write generic unit files that adapt to the local system.
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And port a couple of users over to it.
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limit into account
When determining the amount of RAM in the system, let's make sure we also read
the root-level cgroup memory limit into account. This isn't particularly useful
on the host, but in containers it makes sure that whatever memory the container
got assigned is actually used for RAM size calculations.
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