writing to closed stdout (II): exit status

[Paul Backus]

On Sunday, 15 December 2024 at 19:53:34 UTC, kdevel wrote:
> Sorry for replying again. The truncation to eight bit is not my 
> point. My point is that *in the case of a closed stdout*
>
> ```
>    return 0;
> ```
>
> causes an exit status of 1 but
>
> ```
>    return 256;
> ```
>
> lets exit status become 0.

Oh, yeah, that happens because druntime specifically checks for 
exit status 0:

https://github.com/dlang/dmd/blob/v2.109.1/druntime/src/rt/dmain2.d#L535-L543

I guess the correct thing to do here would be to check if `result 
& 0xFF == 0`.