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

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

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

Functions described here are available as a shared library, which can be compiled against and linked to with the libsystemdpkg-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.

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.

systemd(1), sd-daemon(3) systemd 257.7 SD_BOOTED(3)