systemd-run-generator(8) — Linux manual page

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)

COLOPHON

       This page is part of the systemd (systemd system and service
       manager) project.  Information about the project can be found at
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have
       a bug report for this manual page, see
       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2024-06-14.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2024-06-13.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

systemd 257~devel                               SYSTEMD-RUN-GENERATOR(8)

Pages that refer to this page: kernel-command-line(7), systemd.directives(7), systemd.index(7)

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