bug#9800: Incomplete truncated file buffers from the /proc filesystem

[Juri Linkov]

>> It strikes me that regular files can go as you read them, too,
>> and that Emacs is not doing this properly.  That is, Emacs should
>> be fixed so that it continues to read from a growing regular file
>> until a proper EOF is reached (i.e., until read returns 0).
>
> Sounds like a good idea, but remember to bail out some time before
> reading the infinitely big files to the very end.  :-)

Maybe limit the reading by the value of `large-file-warning-threshold'.