read till EOF from stdin

[kdevel]

On Friday, 11 December 2020 at 15:57:37 UTC, frame wrote:
> On Friday, 11 December 2020 at 12:34:19 UTC, kdevel wrote:
>> My code cannot do that because the function byChunk has 
>> control over the
>> file descriptor.
>
> What do you mean by control?

The error happens while the cpu executes code of the D runtime 
(or the C library).
After looking into std/stdio.d I found that byChunk uses fread 
(not read). Thus I think I ran into [1] which seems to affect 
quite a lot of programs [2] [3].

~~~bychunk.d
void main ()
{
    import std.stdio;
    foreach (buf; stdin.byChunk (4096)) {
       auto s = cast (string) buf;
       writeln ("buf = <", s, ">");
    }
}
~~~

STR:

1. ./bychunk
2. A, [RETURN]
3. CTRL+D

expected: program ends
found: program still reading


[1] https://sourceware.org/bugzilla/show_bug.cgi?id=1190
     Bug 1190 Summary: fgetc()/fread() behaviour is not POSIX 
compliant

[2] 
https://unix.stackexchange.com/questions/517064/why-does-hexdump-try-to-read-through-eof

[3] 
https://stackoverflow.com/questions/52674057/why-does-an-fread-loop-require-an-extra-ctrld-to-signal-eof-with-glibc