Man pages matching name pathconf in section 3:

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