I agree with all of Ingo's comments. A man page is a reference, not a history, not a tutorial, not a style guide, There s nothing to say about NULL beyond it's being a synonym for the constant 0 converted to the null pointer. Other facts about the behavior of null pointers will have been learned however or wherever one learned C.
The remark about segfaults is really about hardware, not about C. Sometimes the undefined behavior can be made to manifest as a segfault. But it is not an intrinsic property of null pointers. Incidentally, I personally don't use NULL. Why, when C provides a crisp notation, 0, should one want to haul in an extra include file to activate a shouty version of it? Doug
