Even 'man 7 signal' says clearly that 'The details vary across Unix systems; below, the details for Linux', and that's not terribly useful really for the vast majority of software. (I suppose you can rely on it in mdadm ;} )
Copyright © 2017, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds