Files
systemd/src/nspawn/nspawn-util.h
Zbigniew Jędrzejewski-Szmek 7e6821ed4e nspawn: fix comparisons of versions with non-numerical suffixes
See a2b0cd3f5a. When -Dshared-lib-tag is used,
libsystemd-shared.so and libsystemd-core.so get a suffix which breaks the
parsing done by systemd_installation_has_version(). We can assume that the
tag will be something like "251-rc1-1.fc37" that is currently used in Fedora.
(Anything that does *not* start with the version would be completely crazy.)
By switching to strverscmp_improved() we simplify the code and fix comparisons
with such versions.

$ build/test-nspawn-util /var/lib/machines/rawhide
...
Found libsystemd shared at "/var/lib/machines/rawhide/lib/systemd/libsystemd-shared-251-rc1-1.fc37.so.so", version 251-rc1-1.fc37 (OK).
/var/lib/machines/rawhide has systemd >= 251: yes
...

I noticed this when I started a systemd-nspawn container with Redora rawhide
and got the message "Not running with unified cgroup hierarchy, LSM BPF is not
supported". I thought the message is in error, but it was actually correct:
nspawn was misdetecting that the container does not sport new-enough systemd
to support cgroups-v2.
2022-04-07 18:19:03 +02:00

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C

/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
int systemd_installation_has_version(const char *root, const char *minimal_version);