Most university libraries keep a copy or two of every textbook on hand, but don't actually allow you to check them out. Students pull it off the shelf long enou

Most university libraries keep a copy or two of every textbook on hand, but don't actually allow you to check them out. Students pull it off the shelf long enough to photocopy the pages they need, then put it back. Often groups of students get together and take turns making multiple sets of copies for the whole group. A few times I actually had professors that were nice enough to make copies for the students ahead of time. One professor even went to the trouble of having a local print shop print and bind the copies in paperback. We had to pay something like $10 to cover the costs. Is any or all of that copyright infringement? Is there an exception for universities? Is this just a case of the law being so disconnected from reality that people don't even know they are breaking it?