Description¶

sd-varlink.h is part of libsystemd(3) and provides APIs for implementing Varlink IPC clients and services. See https://varlink.org/ for more information about Varlink IPC.

Varlink IPC uses JSON as marshalling format. The sd-varlink API relies on the sd-json(3) API for JSON serialization, deserialization and manipulation.

The varlinkctl(1) tool makes the functionality implemented by sd-varlink available from the command line.

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), sd-event(3), sd-json(3), varlinkctl(1), sd-bus(3), pkg-config(1)