scope(exit) and Ctrl-C

[Patrick Schluter]

On Saturday, 2 December 2017 at 04:49:26 UTC, H. S. Teoh wrote:
> On Sat, Dec 02, 2017 at 04:38:29AM +0000, Adam D. Ruppe via 
> Digitalmars-d-learn wrote:
>> [...]
>
> Signal handlers can potentially be invoked while inside a 
> non-reentrant libc or OS function, so trying to do anything 
> that (indirectly or otherwise) calls that function will cause 
> havoc to your program.  Also, while the signal handler is 
> running, some (all?) further signals may be blocked, meaning 
> that your program might miss an important signal if your sig 
> handler takes too long to run.  Furthermore, the signal may 
> have happened in the middle of your own code, so race 
> conditions may apply (e.g. if you're modifying global data in 
> both).
>
> [...]

On Linux you can use signalfd() for that, but nice trick if you 
want Posix portability.