Man pages matching name selinux_check_securetty_context in section 3:

selinux_check_securetty_context.3.en	debian 10 / libselinux1-dev
selinux_check_securetty_context.3.en	debian 11 / libselinux1-dev
selinux_check_securetty_context.3.en	debian 12 / libselinux1-dev