The particular inetd was just an example, but even for use with exact inetd from 1986, there are many solutions in modern operating systems to restrict any proc

The particular inetd was just an example, but even for use with exact inetd from 1986, there are many solutions in modern operating systems to restrict any process, like SELinux, AppArmor, Seccomp and capabilities, LXC unprivileged containers and whatnot.