I've read several question about double dash:
However I remember about a teacher 4 years ago telling me that
-- was the posix way of dealing with long switches like
Today, I'm using a lot of command where this rule is not respected at all and the best example I can came up with is
find where no long switches takes a double-dash even with the very annoying
Was my teacher wrong? or does the rule changes since (which seems unlikely)?
And finally, is there any
posix rules about the length of option and