Inspired by this [https://laskarnix.org/devuan-migrate-fr … enrc-init/], I tried the following approach on Devuan.

## 1. Create an empty package to replace `sysvinit-core`

I created an empty package named `openrc-init` with the following control information:

```text
Conflicts: sysvinit-core
Replaces: sysvinit-core
Provides: sysvinit-core
Depends: openrc
```

After installing this package, `sysvinit-core` is removed from the system.

## 2. Use `openrc-init` as PID 1

Create a symlink that points `/sbin/init` to the `openrc-init` provided by OpenRC:

```sh
ln -sf /sbin/openrc-init /sbin/init
```

I also created the `poweroff` and `reboot` commands.

### `poweroff`

```sh
#!/bin/sh
exec /sbin/openrc-shutdown -p 0
```

### `reboot`

```sh
#!/bin/sh
exec /sbin/openrc-shutdown -r 0
```

## 3. Create and enable TTY services

Create `agetty` service links for `tty1` through `tty6`, then add them to the default runlevel:

```sh
for n in $(seq 1 6); do
    ln -s agetty "agetty.tty$n"
    rc-update add "agetty.tty$n" default
done
```

The system was able to boot normally. 👍

## Idea

As more and more Debian packages remove support for SysV service scripts in the future, it may be possible to build a Devuan distribution centered around OpenRC without extensively modifying or rebuilding upstream Debian packages.

The general approach could be:

- Reuse upstream Debian SysV service scripts whenever they are still available, reducing maintenance work;
- When a service no longer has a usable SysV script, obtain an appropriate OpenRC service script from Gentoo or Alpine Linux;
- Provide a compatibility layer or adaptation mechanism so that existing Debian packages can continue to work in an OpenRC environment;
- Minimize modifications to upstream packages in order to reduce long-term maintenance costs.

In this way, Devuan could preserve the Debian package ecosystem while gradually building a more complete and independent initialization and service-management system centered around OpenRC.