systemd A monkey with a typewriter Zbigniew Jędrzejewski-Szmek zbyszek@in.waw.pl sd_bus_new 3 sd_bus_new sd_bus_ref sd_bus_unref Create a new bus object and create or destroy references to it #include <systemd/sd-bus.h> int sd_bus_new sd_bus** bus sd_bus* sd_bus_ref sd_bus* bus sd_bus* sd_bus_unref sd_bus* bus sd_bus_new() creates a new bus object. This object is reference counted, and will be destroyed when all references are gone. Initially, the caller of this function owns the sole reference. sd_bus_ref() creates a new reference to bus. This bus object will not be destroyed until sd_bus_unref() has been called as many times plus once more. Once the reference count has dropped to zero, bus cannot be used anymore, so further calls to sd_bus_ref() or sd_bus_unref() are illegal. sd_bus_unref() destroys a reference to bus. On success, sd_bus_new() returns 0 or a positive integer. On failure, it returns a negative errno-style error code. sd_bus_ref always returns the argument. sd_bus_unref always returns NULL. Returned errors may indicate the following problems: -ENOMEM Memory allocation failed. sd_bus_new() and other functions described here are available as a shared library, which can be compiled and linked to with the libsystemd-bus pkg-config1 file. systemd1, sd-bus3, sd_bus_open_user3, sd_bus_open_system3, sd_bus_default_user3, sd_bus_default_system3