It is important to realize that it does have some gaping holes, though. For example: I was recently unable to unearth from it exactly when the BSD ps command c

It is important to realize that it does have some gaping holes, though. For example: I was recently unable to unearth from it exactly when the BSD ps command changed to using getopt() and minus signs for arguments. The entire history of the FreeBSD repository back to the original 4.4BSD commits has ps using getopt(), and minus signs have been the only option syntax documented in the ps(1) manual page for all of that time, too. * https://svnweb.freebsd.org/base/head/bin/ps/ps.c?revision=1556&view=markup#l133 https://svnweb.freebsd.org/base/head/bin/ps/ps.c?revision=15... * https://svnweb.freebsd.org/base/head/bin/ps/ps.1?revision=1556&view=markup#l42 https://svnweb.freebsd.org/base/head/bin/ps/ps.1?revision=15... This repository, alas, does not yield very much further information.