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.

SEE ALSO

       systemd(1), sd-daemon(3)