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We have a common parser, but for the user it might be
completely unobvious that the same general rules apply
to all those files. Let's add a page about the basic syntax
so that the more specific pages don't have to repeat those
details.
The NULSTR_FOREACH iterator needs to see an empty string at the end, so
we need to insert an extra NUL explicitly.
Also update PATH0_BIN_SBIN(x) to include an extra NUL terminator, rename
it to PATH_BIN_SBIN_NULSTR(x), which is more consistent with the similar
CONF_PATHS_NULSTR(x) macro.
Fixes: 5008da1ec1
This also introduces `manager_is_connected()` helper function, which
returns true when the manager is sending a request, resolving a server
name, or in a poll interval.
Follow-up for 3e85ec0721.
Fixes#8719.
A couple of minor modernizations:
1. Don't unnecessarily export functions we don't call outside of
machined.c
2. Use cleanup logic for the manager object.
3. Propagate errors properly from manager_new(). So far if
sd_event_new() returns EMFILE/ENFILE for some reason we would have
logged that as log_oom(), which isn#t right, really.
4. Handle SIGTERM/SIGINT cleanly. It's easy, and prettier then letting
the kernel just abort us. It also makes it possible to valgrind
machined properly.
The dhcp4 code sets link->dhcp4_configured when dhcp4_route_handler()
has processed the last message.
However, in case UseRoutes=no has been set in the [DHCP] section, or
in case the DHCP server simply sends no routes, link_set_dhcp_routes()
will not send any netlink messages and dhcp4_route_handler() will
therefore never be called.
This causes the link to never reach LINK_STATE_CONFIGURED, and e.g.
systemd-networkd-wait-online will not consider the link as ready.
Fix that by setting link->dhcp4_configured = true and calling
link_check_ready() in dhcp4_address_handler() in case
link_set_dhcp_routes() sent no netlink messages (dhcp4_messages is
zero).
In some situation if networkd fails to get the network file
then networkd crashes becasse the link->network is not initalized;
```
veth99: Failed to get network dhcp-client-ipv4-only: No such file or directory
Segmentation fault
gdb) r
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /home/sus/tt/systemd/build/systemd-networkd
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
warning: Loadable section ".note.gnu.property" outside of ELF segments
warning: Loadable section ".note.gnu.property" outside of ELF segments
warning: Loadable section ".note.gnu.property" outside of ELF segments
Program received signal SIGSEGV, Segmentation fault.
link_load (link=0x55555582ccd0) at ../src/network/networkd-link.c:2973
2973 r = sd_dhcp_client_new(&link->dhcp_client, link->network->dhcp_anonymize);
(gdb) bt
(gdb) p link->network
$1 = (Network *) 0x0
(gdb) list
2968 if (r < 0) {
2969 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
2970 goto dhcp4_address_fail;
2971 }
2972
2973 r = sd_dhcp_client_new(&link->dhcp_client, link->network->dhcp_anonymize);
2974 if (r < 0)
2975 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
2976
2977 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
(gdb) r
```
Support for alternative NTP services was dropped by b72ddf0f4f.
This makes timedated re-support alternative NTP services.
Closes#8402. Also, fixes#1329.
We go through the whole file system, so this test can take arbitrary time. But
this test is still quite useful, so let's at least try to make it more efficent
by not descending at all into the directories we would filter out later on
anyway.
Also increase the timeout, in case the previous step doesn't help enough.
Absolute paths make everything simple and quick, but sometimes this requirement
can be annoying. A good example is calling 'test', which will be located in
/usr/bin/ or /bin depending on the distro. The need the provide the full path
makes it harder a portable unit file in such cases.
This patch uses a fixed search path (DEFAULT_PATH which was already used as the
default value of $PATH), and if a non-absolute file name is found, it is
immediately resolved to a full path using this search path when the unit is
loaded. After that, everything behaves as if an absolute path was specified. In
particular, the executable must exist when the unit is loaded.
This doesn't change the outcome:
(before)
/home/zbyszek/src/systemd/test/test-execute/exec-basic.service:6: Executable path specifies a directory: /usr/bin/test/
exec-basic.service: Failed to create exec-basic.service/start: Unit exec-basic.service is not loaded properly: Exec format error.
(after)
/home/zbyszek/src/systemd/test/test-execute/exec-basic.service:6: Executable path specifies a directory: /usr/bin/test/
Failed to load file /home/zbyszek/src/systemd/test/test-execute/exec-basic.service: Exec format error
(before)
masked.service: Failed to create masked.service/start: Unit masked.service is masked.
(after)
File /home/zbyszek/src/systemd/test/test-execute/masked.service is masked.
but the failure is immediate and the error messages are more direct.
Doing manager_load_unit() followed by UNIT_VTABLE(unit)->start(unit) would
result in an assertion failure in ->start() if the unit failed to load
properly. Something like this is okey-ish is tests, since the test units are
not expected to fail to load, but the reason for failure is clearer if we
fail immediately.
Systems that have an accurate real-time clock may have an initial
unsynchronized time that is close enough to the synchronized time that
the final adjustment doesn't trigger a waking "clock set" event. Have
timesyncd touch a file in its runtime directory as a secondary signal
for synchronization. Continue to support the timerfd-based trigger as a
sufficient condition when the watchfile is not present.
Closes issue #8683
