sd_booted (3) - Linux Manuals

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

Command to display sd_booted manual in Linux: $ man 3 sd_booted

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

These APIs are implemented as a shared library, which can be compiled 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.