rlimit
pub fn prlimit( pid: pid_t, resource: Resource, new_limit: Option<(Rlim, Rlim)>, old_limit: Option<(&mut Rlim, &mut Rlim)>) -> Result<()>
[Linux] Set and get the resource limits of an arbitrary process.
See https://man7.org/linux/man-pages/man2/prlimit.2.html