get file via tftp and write to filesystem, get length of tftp transfer

[Elmar Psilog]

> On Tue, Nov 30, 2021 at 07:51:28AM +0100, Elmar Psilog wrote:
>
>> Hello, is it possible to download a file via network (tftp) and write it
>> to a filesystem as ext4? This looks like a combination of
>> tftpboot and ext4write but how to get sizebytes?
>> I don't find how to get the length information from tftpboot into a
>> variable - it seems to me only displayed on screen. Did I miss something?
> The filesize environment variable is almost always set when we "read"
> something from a source, including tftp.
>
Thanks Tom! How could I miss that?

Writing ext4 only works if it was formatted with -O ^metadata_csum.

Best regards, Elmar