libsystemd(3) — Linux manual page


LIBSYSTEMD(3)                  libsystemd                  LIBSYSTEMD(3)

NAME         top

       libsystemd - Functions for implementing services and interacting
       with systemd

SYNOPSIS         top

       #include <systemd/sd-bus.h>
       #include <systemd/sd-bus-vtable.h>
       #include <systemd/sd-bus-protocol.h>
       #include <systemd/sd-daemon.h>
       #include <systemd/sd-device.h>
       #include <systemd/sd-event.h>
       #include <systemd/sd-gpt.h>
       #include <systemd/sd-hwdb.h>
       #include <systemd/sd-id128.h>
       #include <systemd/sd-journal.h>
       #include <systemd/sd-login.h>
       #include <systemd/sd-messages.h>
       #include <systemd/sd-path.h>

       pkg-config --cflags --libs libsystemd

DESCRIPTION         top

       The libsystemd library provides functions that allow interacting
       with various interfaces provided by the systemd(1) service
       manager, as well as various other functions and constants useful
       for implementing services in general.

       See sd-bus(3), sd-bus-errors(3), sd-daemon(3), sd-device(3),
       sd-event(3), sd-hwdb(3), sd-id128(3), sd-journal(3), and
       sd-login(3) for information about different parts of the library


       Strict backwards-compatibility is maintained for the API
       (application programming interface) and ABI (application binary
       interface). Symbol versioning is used, with symbols only added
       and never removed.

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.

       The code described here uses getenv(3), which is declared to be
       not multi-thread-safe. This means that the code calling the
       functions described here must not call setenv(3) from a parallel
       thread. It is recommended to only do calls to setenv() from an
       early phase of the program when no other threads have been

SEE ALSO         top

       systemd(1), libudev(1), pkg-config(1), Interface Portability and
       Stability Promise[1]

NOTES         top

        1. Interface Portability and Stability Promise

COLOPHON         top

       This page is part of the systemd (systemd system and service
       manager) project.  Information about the project can be found at
       ⟨⟩.  If you have
       a bug report for this manual page, see
       This page was obtained from the project's upstream Git repository
       ⟨⟩ 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

systemd 255                                                LIBSYSTEMD(3)

Pages that refer to this page: sd-bus(3)sd-bus-errors(3)sd-daemon(3)sd-device(3)sd-event(3)sd-hwdb(3)sd-id128(3)sd-journal(3)sd-login(3)systemd.directives(7)systemd.index(7)