ctrl+c and destructors

[Adam D. Ruppe]

Is there anything we can do to automatically clean up if the user 
hits ctrl+c on Linux?

I just had my system get messed up because I was allocating 
shared memory with the X server, which was released in the 
destructor... but that never got called because I killed the 
program with ctrl+c. Then the system ran out of shm handles and I 
had to clean that up before i could start a bunch of programs 
again.

Of course, a possible solution is to set up a signal handler in 
my own program, but even with that, tracking all the dtors that 
need to actually be called sounds difficult, especially as the 
program gets more involved.


Is it possible to either:

1) make ctrl+c throw an exception so destructor cleanup happens 
normally

or

2) call all the destructors and kill the program from inside a 
signal handler without throwing a normal exception; it doesn't 
matter to me that it is unrecoverable, I just need these handles 
cleaned up.


My backup plan is to just ignore the ctrl+c signal, or maybe set 
a flag in my event loop and terminate the program that way.