man7.org > Linux > man-pages

Linux/UNIX system programming training

sd_booted(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | SEE ALSO | COLOPHON 

SD_BOOTED(3)                    sd_booted                   SD_BOOTED(3)

NAME         top

       sd_booted - Test whether the system is running the systemd init
       system

SYNOPSIS         top

       #include <systemd/sd-daemon.h>

       int sd_booted(void);

DESCRIPTION         top

       sd_booted() checks whether the system was booted up using the
       systemd init system.

RETURN VALUE         top

       On failure, this call returns a negative errno-style error code.
       If the system was booted up with systemd as init system, this
       call returns a positive return value, zero otherwise.

NOTES         top

       Functions described here are available as a shared library, which
       can be compiled against and linked to with the
       libsystemd pkg-config(1) file.

       Internally, this function checks whether the directory
       /run/systemd/system/ exists. A simple check like this can also be
       implemented trivially in shell or any other language.

SEE ALSO         top

       systemd(1), sd-daemon(3)

COLOPHON         top

       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 2023-12-22.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2023-12-22.)  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 255                                                 SD_BOOTED(3)

Pages that refer to this page: systemd-notify(1),  sd-daemon(3),  systemd.directives(7),  systemd.index(7)

HTML rendering created 2023-12-22 by Michael Kerrisk, author of The Linux Programming Interface.

For details of in-depth Linux/UNIX system programming training courses that I teach, look here.

Hosting by jambit GmbH.

Cover of TLPI