systemd-run-generator - Generator for invoking commands
          specified on the kernel command line as system service


          systemd-run-generator is a generator that reads the kernel
          command line and understands three options:

          If the option is specified and followed by a
          command line, a unit named kernel-command-line.service is
          generated for it and booted into. The service has
          Type=oneshot set, and has SuccessAction=exit and
          FailureAction=exit configured by default, thus ensuring that
          the system is shut down as soon as the command completes.
          The exit status of the command line is propagated to the
          invoking container manager, if this applies (which might
          propagate this further, to the calling shell - e.g.
          systemd-nspawn(7) does this). If this option is used
          multiple times the unit file will contain multiple
          ExecStart= lines, to execute all commands in order. The
          command is started as regular service, i.e. with
          DefaultDependencies= on.

          Use systemd.run_success_action= and
          systemd.run_failure_action= to tweak how to react to the
          process completing. In particular assigning "none" will
          leave the system running after the command completes. For
          further details on supported arguments, see systemd.unit(5).

          systemd-run-generator implements systemd.generator(7).

          Use a command like the following to add a user to the user
          database inside a container run with systemd-nspawn(7):

              # systemd-nspawn -D mycontainer -b'"adduser test"'

          (Note the requirement for double quoting in the command line
          above. The first level of quoting ('') is processed and
          removed by the command shell used to invoke systemd-nspawn.
          The second level of quoting ("") is propagated to the kernel
          command line of the container and processed and removed by
          systemd-run-generator. Both together make sure both words of
          the specified command line adduser test end up in the
          generated unit file together and are neither split apart by
          the command shell nor by the generator.)

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          systemd(1), systemctl(1), kernel-command-line(7), systemd-
          nspawn(7), systemd.unit(5), systemd.service(5)

     Page 2                     systemd 247          (printed 5/25/22)