Some version of *BSDs probably fixed that with some sysctl interface, but on older Unixes you would read the kernel memory to get that system information. You

Some version of *BSDs probably fixed that with some sysctl interface, but on older Unixes you would read the kernel memory to get that system information. You can see a ps.c implementation here: https://searchcode.com/codesearch/view/29853364/ https://searchcode.com/codesearch/view/29853364/ which uses kvm library: https://www.freebsd.org/cgi/man.cgi?query=kvm&sektion=3&apropos=0&manpath=FreeBSD+12.0-RELEASE+and+Ports https://www.freebsd.org/cgi/man.cgi?query=kvm&sektion=3&apro...