Shutdown signals

[Tim]

On Monday, 10 May 2021 at 23:55:18 UTC, Adam D. Ruppe wrote:
> On Monday, 10 May 2021 at 23:35:06 UTC, Tim wrote:
>> [...]
>
> dpldocs.info/signal it comes up as the second result.
>
> The C function you call from there (on linux anyway) is 
> sigaction. A little copy/paste out of my terminal.d:
>
> ```d
>       // I check this flag in my loop to see if an interruption 
> happened
>       // then i can cleanly exit from there.
>        __gshared bool interrupted;
>
>       // the interrupt handler just sets the flag
>        extern(C)
>        void interruptSignalHandler(int sigNumber) nothrow {
>                interrupted = true;
>        }
>
>        // then this code registers the handler with the system
>        import core.sys.posix.signal;
>        sigaction_t n;
>        n.sa_handler = &interruptSignalHandler;
>        sigaction(SIGINT, &n, &oldSigIntr); // third arg can 
> also be null if you don't care about the old one
> ```

I don't know why I didn't find that. I was searching for the full 
name, maybe too specific? Thanks anyways, this is super helpful. 
I wish it was documented better though :(

So why use sigaction and not signal? From what I can tell signal 
is the C way of doing things