Man pages matching name getumask in section 3:

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