https://man7.org/linux/man-pages/man2/PR_GET_SECUREBITS.2const.html
PR_GET_SECUREBITS(2const) - Linux manual page
prgetlinuxmanual
https://manpages.ubuntu.com/manpages/questing/man2/PR_GET_SECUREBITS.2const.html
Ubuntu Manpage: PR_GET_SECUREBITS - get the "securebits" flags of the calling thread
get the "securebits" flags of the calling thread
ubuntumanpageprgetflags