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gcrypt_util_sources had to be moved because otherwise they appeared twice
in libshared.so halfproducts, causing an error.
-fvisibility=default is added to libbasic, libshared_static so that the symbols
appear properly in the exported symbol list in libshared.
The advantage is that files are not compiled twice. When configured with -Dman=false,
the ninja target list is reduced from 1588 to 1347 targets. The difference in compilation
time is small (<10%). I think this is because of -O0 and ccache and multiple cores, and
in different settings the compilation time could be reduced. The main advantage is that
errors and warnings are not reported twice.
This gets rid of recompilation, making things faster and avoids duplicated warnings.
The result seems to be the same:
$ ls -l build/libsystemd.so.0.20.0 build2/libsystemd.so.0.20.0
-rwxrwxr-x. 1 zbyszek zbyszek 3071312 Dec 19 11:45 build2/libsystemd.so.0.20.0
-rwxrwxr-x. 1 zbyszek zbyszek 3071760 Dec 19 11:11 build/libsystemd.so.0.20.0
$ diff -U1 <(objdump -T build/libsystemd.so.0.20.0|sed -r 's/[0-9a-f]{16}/________________/g') <(objdump -T build2/libsystemd.so.0.20.0|sed -r 's/[0-9a-f]{16}/________________/g')
-build/libsystemd.so.0.20.0: file format elf64-x86-64
+build2/libsystemd.so.0.20.0: file format elf64-x86-64
We already use the "_static" suffix for libshared_static ("shared" is the name
of the library, "static" is the format) and other libs, so let's rename for
consistency.
Also change libsystemd_static_sources to libsystemd_sources, since the same
list is used for both and shorter is better.
Quoting Lennart Poettering in
https://github.com/systemd/systemd/pull/6464#issuecomment-319029293:
> If the kernel allows us to query that data we should also be Ok with passing
> it on to our own caller, regardless if selinux is technically on or off...
The advantage is that this allows gcc to be smarter and reduce linkage:
(before)$ ldd build/libnss_systemd.so.2
linux-vdso.so.1 (0x00007ffeb46ff000)
librt.so.1 => /lib64/librt.so.1 (0x00007f2f60da6000)
libcap.so.2 => /lib64/libcap.so.2 (0x00007f2f60ba1000)
libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f2f60978000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f2f60759000)
libc.so.6 => /lib64/libc.so.6 (0x00007f2f60374000)
/lib64/ld-linux-x86-64.so.2 (0x00007f2f61294000)
libpcre2-8.so.0 => /lib64/libpcre2-8.so.0 (0x00007f2f600f0000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007f2f5feec000)
(after )$ ldd build/libnss_systemd.so.2
linux-vdso.so.1 (0x00007ffe5f543000)
librt.so.1 => /lib64/librt.so.1 (0x00007f427dcaa000)
libcap.so.2 => /lib64/libcap.so.2 (0x00007f427daa5000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f427d886000)
libc.so.6 => /lib64/libc.so.6 (0x00007f427d4a1000)
/lib64/ld-linux-x86-64.so.2 (0x00007f427e196000)
Note that this only works in conjuction with the previous commit: either
of the two commits alone does not have the desired effect on linkage.
Replaces #6464.
Translated taint message.
Also added a blank line before "Current system is tagged" for better
visual separation between current system state and tags description.
Up until now, the behaviour in systemd has (mostly) been to silently
ignore failures to action unit directives that refer to an unavailble
controller. The addition of AssertControlGroupController and its
conditional counterpart allow explicit specification of the desired
behaviour when such a situation occurs.
As for how this can happen, it is possible that a particular controller
is not available in the cgroup hierarchy. One possible reason for this
is that, in the running kernel, the controller simply doesn't exist --
for example, the CPU controller in cgroup v2 has only recently been
merged and was out of tree until then. Another possibility is that the
controller exists, but has been forcibly disabled by `cgroup_disable=`
on the kernel command line.
In future this will also support whatever comes out of issue #7624,
`DefaultXAccounting=never`, or similar.
Systemd services are permitted to be scripts, as well as binary
executables.
The same also applies to the underlying /sbin/mount and /sbin/swapon.
It is not necessary for the user to consider what type of program file
these are. Nor is it necessary with systemd-nspawn, to distinguish between
init as a "binary" v.s. a user-specified "program".
Also fix a couple of grammar nits in the modified sentences.
Otherwise, setting udev_log=debug in /etc/udev/udev.conf has no effects since
systemd-udevd is built with LOG_REALM=LOG_REALM_UDEV.
However using LOG_REALM_UDEV (for libudev_core) reveals another similar bug for
udevadm which should also define LOG_REALM_UDEV.
This code is executed before we parse command line/configuration
parameters, hence let's not use arg_system to figure our how to clean up
things, but instead PID == 1. Let's move that check inside of the
function, to make things a bit more robust abstract from the outside.
Also, let's add a log message about this, that was so far missing.
Let's place them in initialize_runtime(), where they appear to fit best.
Effectively this is just a move a little bit down, swapping places with
log_execution_mode(), which should require neither call to be done
first.
Note that changes the conditionalization a bit for these calls, from
(PID == 1) to (arg_system && arg_action == ACTION_RUN). At this point this is pretty much the same
however, as we don't allow PID 1 without ACTION_RUN and without
arg_system set, safety_checks() ensures that.
It's part of finalizing our runtime parameters, hence let's move this
into load_configuration() after we loaded everything else. This is safe,
since we don't use it between the location where it was and where we
place it now yet.
This just sets up some variables the loaded configuration will then
modify. Let's invoke it hence right before loading the configuration.
This moves the initialization just a tiny bit later, but that shouldn't
matter, since we never access it in-between.
Let's make sure that if we are PID 1 we are invoked in ACTION_RUN mode,
and in arg_system mode, as well as the opposite.
Everything else is untested and probably not worth supporting hence
let's bail out early if people try anyway.
Let's shorten main() a bit, and split out everything that loads our
configuration and runtime parameters into a function of its own.
No changes in behaviour.
We need to specify a full path to the "ip" binary and busybox "ip" has a
slightly different output than the normal ip, and won't show "DOWN".
hence instead ensure that at lest not "UP" is in there.
The kernel needs two numbers, but for the user it's most convenient to provide the
user name and have that resolved to uid and gid.
Right now the primary group of the specified user is always used. That's the most
common case anyway. In the future we can extend the --owner option to allow a group
after a colon.
[I added this before realizing that this will not be enough to be used for user
runtime directory. But this seems useful on its own, so I'm keeping this commit.]
