man > systemd-run-generator(8)

SYSTEMD-RUN-GENERATOR(8)                systemd-run-generator               SYSTEMD-RUN-GENERATOR(8)

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

SYNOPSIS
       /usr/lib/systemd/system-generators/systemd-run-generator

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

       If the systemd.run= 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).

EXAMPLE
       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 systemd.run='"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.)

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

systemd 255                                                                 SYSTEMD-RUN-GENERATOR(8)