Man pages matching name mkstemp in section 3:

mkstemp.3.de	debian 10 / manpages-de-dev
mkstemp.3.en	debian 10 / manpages-dev
mkstemp.3.es	debian 10 / manpages-es
mkstemp.3.ja	debian 10 / manpages-ja-dev
mkstemp.3.pt	debian 10 / manpages-pt-dev
mkstemp.3.de	debian 11 / manpages-de-dev
mkstemp.3.en	debian 11 / manpages-dev
mkstemp.3.fr	debian 11 / manpages-fr-dev
mkstemp.3.ja	debian 11 / manpages-ja-dev
mkstemp.3.pt	debian 11 / manpages-pt-dev
mkstemp.3.de	debian 12 / manpages-de-dev
mkstemp.3.en	debian 12 / manpages-dev
mkstemp.3.fr	debian 12 / manpages-fr-dev
mkstemp.3.ja	debian 12 / manpages-ja-dev