implementation.</para>
<para>Internally, this function checks whether the
- <filename>/sys/fs/cgroup/systemd</filename> virtual file
- system is mounted, by comparing the st_dev value of
- the <function>stat()</function> data of
- <filename>/sys/fs/cgroup</filename> and
- <filename>/sys/fs/cgroup/systemd</filename>.</para>
+ directory <filename>/run/systemd/system/</filename>
+ exists. A simple check like this can also be
+ implemented trivially in shell or any other
+ language.</para>
<para>For details about the algorithm check the
liberally licensed reference implementation sources:
<filename>sd-daemon.h</filename> files. These
interfaces are available as shared library, which can
be compiled and linked to with the
- <literal>libsystemd-daemon</literal>
- <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ <constant>libsystemd-daemon</constant> <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
file. Alternatively, applications consuming these APIs
may copy the implementation into their source
tree. For more details about the reference
<para>If the reference implementation is used as
drop-in files and -DDISABLE_SYSTEMD is set during
- compilation this function will always return 0 and
+ compilation, this function will always return 0 and
otherwise become a NOP.</para>
</refsect1>