sd_booted - Man Page

#include <systemd/sd-daemon​.h>

int sd_booted(void);

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

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​.

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

systemd(1), sd-daemon(3)

sd-daemon(3), systemd.directives(7), systemd.index(7), systemd-notify(1).