- user identifier parameter can be be passed NULL, in
- case only one of the parameters shall be queried. The
- returned string needs to be freed with the libc
- <citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ user identifier parameter can be passed
+ <constant>NULL</constant>, in case only one of the
+ parameters shall be queried. The returned string needs
+ to be freed with the libc
+ <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>