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When two fields were added to the vtable.x.start struct, no initializers
for these were added to SD_BUS_VTABLE_END which also (ab)used that
struct (albeit sneakily by using non-designated initialization).
While C tolerates this, C++ prohibits these missing initializers, and
both g++ and clang++ will complain when using -Wextra.
This patch gives SD_BUS_VTABLE_END its own case in the union and
clarifies its initialization.
I tested the behaviour of g++ 10.2 and clang 11 in various cases. Both will warn
(-Wmissing-field-initializers, implied by -Wextra) if you provide initializers for some
but not all fields of a struct. Declaring x.end as empty struct or using an empty initializer
{} to initialize the union or one of its members is valid C++ but not C, although both gcc
and clang accept it without warning (even at -Wall -Wextra -std=c90/c++11) unless you
use -pedantic (which requires -std=c99/c++2a to support designated initializers).
Interestingly, .x = { .start = { 0, 0, NULL } } is the only initializer I found for the union
(among candidates for SD_BUS_VTABLE_END) where gcc doesn't zero-fill it entirely
when allocated on stack, it looked like it did in all other cases (I only examined this on
32-bit arm). clang always seems to initialize all bytes of the union.
[zjs: test case:
$ cat vtable-test.cc
#include "sd-bus.h"
const sd_bus_vtable vtable[] = {
SD_BUS_VTABLE_END
};
$ g++ -I src/systemd/ -Wall -Wmissing-field-initializers -c vtable-test.cc
vtable-test.cc:5:1: warning: missing initializer for member ‘sd_bus_vtable::<unnamed union>::<unnamed struct>::features’ [-Wmissing-field-initializers]
5 | };
| ^
vtable-test.cc:5:1: warning: missing initializer for member ‘sd_bus_vtable::<unnamed union>::<unnamed struct>::vtable_format_reference’ [-Wmissing-field-initializers]
$ clang++ -I src/systemd/ -Wmissing-field-initializers -c vtable-test.cc
vtable-test.cc:4:4: warning: missing field 'features' initializer [-Wmissing-field-initializers]
SD_BUS_VTABLE_END
^
src/systemd/sd-bus-vtable.h:188:28: note: expanded from macro 'SD_BUS_VTABLE_END'
.x = { { 0 } }, \
^
1 warning generated.
Both warnings are gone with the patch.]
We would copy "forever" into the buffer. This is a fairly common case, so let's
do a microoptimization and return a static string. (All callers use the return
pointer, so this works just as well.)
The prefix "for " was not displayed, because the pointer to the part of the
buffer after "for " was returned. (Maybe it's just me, but I find strpcpy()
and associated functions really hard to use… I always have to look up what the
do exactly and what the return value is.)
A simple test is added.
When assigning the same address provided by a dynamic addressing
protocol, the new lifetime is stored on Request::Address, but not
Address object in Link object, which can be obtained by address_get().
So, we need to configure address with Address object in Request.
Fixes#20245.
This does two semi-independent but interleaved things: firstly, the manager now
prints the status text (if available) of a service when we have a job running
for that service and it is slow. Because it's hard to fit enough info on the
line, we only do this if the output mode uses unit names. The format of the
line "… job is running for …" is changed to be shorter. This way we can
somewhat reasonably fit two status messages on one line.
Secondly, the manager now sends more information using sd_notify. This mostly
matters for in case of the user manager. In particular, we notify when starting
one of the special units. Without this, when the system manager would display a
line about waiting for the user manager, it would show status like "Ready.",
which is confusing. Now it'll either show something like "Started special unit
shutdown.target", or the line about waiting for a user job.
Also, the timeouts for the user manager are lowered: the user manager usually
(always?) has status disabled, so we would wait for 25 seconds before showing
job progress. Normally we don't expect to have any jobs that take more than a
second. So let's start the progress output fairly quickly, like we would if
status showing was enabled. This obviously makes the output in the system
manager about the user manager more useful. The timeouts are "desynchronized"
by a fraction so if there are multiple jobs running, we'll cycle through
showing all combinations.
Example output:
Stopping user@1000.service...
[ OK ] Stopped dracut-shutdown.service.
[ OK ] Stopped systemd-logind.service.
[ OK ] Stopped systemd-logind.service - User Login Management.
[* ] Job user@1000.service/stop running (2s / 2min): (1 of 2) User job slowstop.service/stop running (1s / 1min 30s)...
[*** ] Job user@1000.service/stop running (3s / 2min): (2 of 2) User job slowstop2.service/stop running (2s / 1min 30s)...
[ ***] Job user@1000.service/stop running (4s / 2min): (1 of 2) User job slowstop.service/stop running (4s / 1min 30s)...
[ *] Job user@1000.service/stop running (5s / 2min): (1 of 2) User job slowstop.service/stop running (5s / 1min 30s)...
[ ***] Job user@1000.service/stop running (6s / 2min): (2 of 2) User job slowstop2.service/stop running (6s / 1min 30s)...
[*** ] Job user@1000.service/stop running (8s / 2min): (1 of 2) User job slowstop.service/stop running (7s / 1min 30s)...
[*** ] Job user@1000.service/stop running (10s / 2min): (2 of 2) User job slowstop2.service/stop running (9s / 1min 30s)...
[ *** ] Job user@1000.service/stop running (11s / 2min): (1 of 2) User job slowstop.service/stop running (10s / 1min 30s)...
[ *] Job user@1000.service/stop running (12s / 2min): (2 of 2) User job slowstop2.service/stop running (12s / 1min 30s)...
[ ***] Job user@1000.service/stop running (13s / 2min): (1 of 2) User job slowstop.service/stop running (13s / 1min 30s)...
[*** ] Job user@1000.service/stop running (15s / 2min): (2 of 2) User job slowstop2.service/stop running (14s / 1min 30s)...
[* ] Job user@1000.service/stop running (15s / 2min): (2 of 2) User job slowstop2.service/stop running (14s / 1min 30s)...
[*** ] Job user@1000.service/stop running (16s / 2min): User job slowstop.service/stop running (16s / 1min 30s)...
[ ***] Job user@1000.service/stop running (18s / 2min): User job slowstop.service/stop running (17s / 1min 30s)...
[ *] Job user@1000.service/stop running (19s / 2min): User job slowstop.service/stop running (18s / 1min 30s)...
[ ***] Job user@1000.service/stop running (20s / 2min): User job slowstop.service/stop running (19s / 1min 30s)...
[* ] Job user@1000.service/stop running (22s / 2min): User job slowstop.service/stop running (22s / 1min 30s)...
[** ] Job user@1000.service/stop running (30s / 2min): User job slowstop.service/stop running (29s / 1min 30s)...
[ ***] Job user@1000.service/stop running (32s / 2min): User job slowstop.service/stop running (31s / 1min 30s)...
[ *] Job user@1000.service/stop running (33s / 2min): User job slowstop.service/stop running (32s / 1min 30s)...
[ ***] Job user@1000.service/stop running (34s / 2min): User job slowstop.service/stop running (33s / 1min 30s)...
[** ] Job user@1000.service/stop running (37s / 2min): User job slowstop.service/stop running (36s / 1min 30s)...
[ *** ] Job user@1000.service/stop running (41s / 2min): User job slowstop.service/stop running (41s / 1min 30s)...
[ OK ] Stopped user@1000.service - User Manager for UID 1000.
Stopping user-runtime-dir@1000.service - User Runtime Directory /run/user/1000...
[ OK ] Unmounted run-user-1000.mount - /run/user/1000.
[ OK ] Stopped user-runtime-dir@1000.service - User Runtime Directory /run/user/1000.
If the output width is lower than approximately 100 columns, the output stops
being very useful. No idea what to do about that.
We would send READY=1,STATUS="Startup finished in …" once after finishing
boot. This changes the message to just "Ready.". The time used to reach
readiness is not part of the ongoing status — it's just a bit of debug
information that it useful in some scenarious, but completely uninteresting
most of the time. Also, when we start sending status about other things in
subsequent patches, we can't really go back to showing "Startup finished in …"
later on. So let's just show "Ready." whenever we're in the steady state.
In manager_check_finished(), more steps are skipped if MANAGER_IS_FINISHED().
Those steps are idempotent, but no need to waste cycles trying to do them
more than once.
We'll now also check whether to send the status message whenever the job queue
runs empty. If we already sent the exact same message already, we'll not send
again.
This is the initiatation of the machine shutdown/reboot/etc, so it's
useful to log about this. We log about the steps that we take, but
so far we didn't really log why we started the sequence (except at
debug level).
The function is renamed, because we also use it for dbus.service,
not just targets.
The man page says asprintf() pointer is "undefined" on error, but the
only meaningful interpretation is that it's either NULL or points to
something that should be freed with free().
Format output in a manner that can be copypasted as-is to NEWS.
That is, with 8 spaces indentation and wrapped at 80 columns.
Before:
$ tools/git-contrib.sh
Ben Stockett,
Carl Lei,
Frantisek Sumsal,
Gibeom Gwon,
Hugo Osvaldo Barrera,
James Hilliard,
Jan Palus,
Lennart Poettering,
Luca Boccassi,
Luca BRUNO,
Mike Gilbert,
nassir90,
nl6720,
Raul Tambre,
Yegor Alexeyev,
Yu Watanabe,
Zbigniew Jędrzejewski-Szmek,
After:
Contributions from: Ben Stockett, Carl Lei, Frantisek Sumsal,
Gibeom Gwon, Hugo Osvaldo Barrera, James Hilliard, Jan Palus,
Lennart Poettering, Luca Boccassi, Luca BRUNO, Mike Gilbert,
nassir90, nl6720, Raul Tambre, Yegor Alexeyev, Yu Watanabe,
Zbigniew Jędrzejewski-Szmek
This makes the default gateway is read from classless static routes or
router option even if UseGateway=no or UseRoutes=no, and will be used
when configuring semi-static routes such that specified with Gateway=_dhcp4.
This also changes the behavior of RoutesToDNS= or RoutesToNTP=.
Previously, the DNS or NTP servers are not in the same network, then the
routes to the servers were not configured when UseGateway=no or
UseRoutes=no. With this commit, the default gateway in classless static
routes or router option will used to connecting the servers even if
UseGateway=no or UseRoutes=no.
Fixes#20208.
For some reasons I do not know, on interface renaming, kernel once send
netlink message with old interface name, and then send with new name.
If eth0 is renamed, and then new interface appears as eth0, then the
message with the old name 'eth0' makes the interface enters failed
state.
To ignore such invalid(?) rename event messages, let's confirm the
received interface name.
Fixes#20203.
Fixes#20189. We would only log at debug level and return failure, which looks
like a noop for the user.
('help' accepts multiple arguments and will show multiple concatenated man
pages in that case. Actually, it will also show multiple concatenated man pages
if the Documentation= setting lists multiple pages. I don't think it's very
terribly useful, but, meh, I don't think we can do much better. If a user
requests a help for a two services, one known and one unknown, there'll now be
a line in the output. It's not very user friendly, but not exactly wrong too.)
