NAME

       libsystemd - Functions for implementing services and interacting with systemd

SYNOPSIS

       #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

       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 interface.

INTERFACE STABILITY

       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

       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 started.

SEE ALSO

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

NOTES

        1. Interface Portability and Stability Promise
           https://systemd.io/PORTABILITY_AND_STABILITY/