[jcalvinowens]

This can help: https://man7.org/linux/man-pages/man2/close_range.2.html

    close_range(3, ~0U, CLOSE_RANGE_UNSHARE);
    execve(....);

...but it's not very portable yet.

[oseityphelysiol]

I’ve never heard of it before. I work in an embedded environment where kernel version is known beforehand, so portability won’t be an issue. Thanks.