Provided by: libsystemd-dev_256.5-2ubuntu3.1_amd64
NAME
sd_booted - Test whether the system is running the systemd init system
SYNOPSIS
#include <systemd/sd-daemon.h> int sd_booted(void);
DESCRIPTION
sd_booted() checks whether the system was booted up using the systemd init system.
RETURN VALUE
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.
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. 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.
SEE ALSO
systemd(1), sd-daemon(3)