Man pages matching name tcsetpgrp in section 3:

tcsetpgrp.3.en	debian 10 / manpages-dev
tcsetpgrp.3.es	debian 10 / manpages-es
tcsetpgrp.3.ja	debian 10 / manpages-ja-dev
tcsetpgrp.3.en	debian 11 / manpages-dev
tcsetpgrp.3.es	debian 11 / manpages-es-dev
tcsetpgrp.3.fr	debian 11 / manpages-fr-dev
tcsetpgrp.3.ja	debian 11 / manpages-ja-dev
tcsetpgrp.3.en	debian 12 / manpages-dev
tcsetpgrp.3.es	debian 12 / manpages-es-dev
tcsetpgrp.3.fr	debian 12 / manpages-fr-dev
tcsetpgrp.3.ja	debian 12 / manpages-ja-dev
tcsetpgrp.3.ru	debian 12 / manpages-ru-dev