Many times I've had to Control-Z a process (suspend it) and then kill it, because Control-C did not propagate correctly. And even then, the kill usually requir

Many times I've had to Control-Z a process (suspend it) and then kill it, because Control-C did not propagate correctly. And even then, the kill usually required a "kill -9". It would be great if consistent interruption could be solved once and for all. In many cases, the presence of sub-processes is essentially an "implementation detail" of the program you're trying to interrupt but you just don't know if the Control-C will work or if the shell will just sit there and hang. And many people are not aware of what shells can do either so they try even more extreme things like closing entire terminal windows to cope.