bug#70477: tail command does not hang on /dev/random

[Paul Eggert]

On 2024-04-19 11:40, Ionut Nicula wrote:
> The following command hangs indefinitely, as expected:
>
>          tail -c 4096 /dev/random
>
> The following command immediately returns 4097 bytes, unexpectedly:
>
>          tail -c 4097 /dev/random

Thanks for the bug report. Although the two commands should behave 
similarly, neither should loop: they should both output the requested 
number of random bytes. Similarly for /dev/zero. I installed the 
attached patch to do that.

0001-tail-avoid-infloop-with-c-on-dev-zero.patch
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