In SecureBoot mode this is probably not what you want. As your cmdline
is cryptographically signed like when using Type #2 EFI Unified Kernel
Images (https://systemd.io/BOOT_LOADER_SPECIFICATION/) The user's
intention is then that the cmdline should not be modified. You want to
make sure that the system starts up as exactly specified in the signed
artifact.
This way we can use libxcrypt specific functionality such as
crypt_gensalt() and thus take benefit of the newer algorithms libxcrypt
implements. (Also adds support for a new env var $SYSTEMD_CRYPT_PREFIX
which may be used to select the hash algorithm to use for libxcrypt.)
Also, let's move the weird crypt.h inclusion into libcrypt.h so that
there's a single place for it.
In subsequent commits, calls to if_nametoindex() will be replaced by a wrapper
that falls back to alternative name resolution over netlink. netlink support
requires libsystemd (for sd-netlink), and we don't want to add any functions
that require netlink in basic/. So stuff that calls if_nametoindex() for user
supplied interface names, and everything that depends on that, needs to be
moved.
If we have a template unit template@.service, it should be allowed to specify a
dependency on a unit without an instance, bar@.service. When the unit is created,
the instance will be propagated into the target, so template@inst.service will
depend on bar@inst.service.
This commit changes unit_dependency_name_compatible(), which makes the manager
accept links like that, and unit_file_verify_alias(), so that the installation
function will agree to create a symlink like that, and finally the tests are
adjusted to pass.
It might be needed to follow symlinks more deeply when we're looking for
enablement symlinks pointing to the removed service.
Let's consider the case where service 'old' is being renamed 'new' (will happen
most likely during package upgrade). Before the service is going to be renamed,
there's the following enablement symlink:
/etc/systemd/system/multi-user.target.wants/old.service -> /usr/lib/systemd/system/old.service
In order to rename 'old' into 'new' and transparently restart the service, the
old name is still provided as a 'static' alias for the new service. This should
also help keeping backward compatibilities since the old name might still be
embedded in unit files, scripts, generators and such.
Hence after the package is upgraded, the following symlinks including the
enablement symlink are present:
/usr/lib/systemd/system/old.service -> new.service
/etc/systemd/system/multi-user.target.wants/old.service -> /usr/lib/systemd/system/old.service
If later the user decides to disable the service, we should figure out that the
enablement symlink (which still has the old name) is actually referring to 'new'
(indirectly) even if it points to the alias.
This mostly reuses existing checkers used by pid1, so handling of aliases
should be consistent. Hopefully, with the test it'll be clearer what it
happening.
Support for .wants/.requires "aliases" is restored. Those are still used in the
wild quite a bit, so we need to support them.
See https://github.com/systemd/systemd/pull/13119 for a discussion of aliases
with an instance that point to a different template: this is allowed.
Lennart Poettering
Zbigniew Jędrzejewski-Szmek
Kevin Kuehler
Yu Watanabe
Anita Zhang
Arian van Putten
Franck Bui