Man pages matching name mkostemp in section 3:

mkostemp.3.de	debian 10 / manpages-de-dev
mkostemp.3.en	debian 10 / manpages-dev
mkostemp.3.ja	debian 10 / manpages-ja-dev
mkostemp.3.de	debian 11 / manpages-de-dev
mkostemp.3.en	debian 11 / manpages-dev
mkostemp.3.fr	debian 11 / manpages-fr-dev
mkostemp.3.ja	debian 11 / manpages-ja-dev
mkostemp.3.de	debian 12 / manpages-de-dev
mkostemp.3.en	debian 12 / manpages-dev
mkostemp.3.fr	debian 12 / manpages-fr-dev
mkostemp.3.ja	debian 12 / manpages-ja-dev