previously on this list Kevin Chadwick contributed:

>          [ -C file_size ] 
>          [ -W filecount ] 
> 
> tcpdump.orgs tcpdump has the above options so that you can constantly
> log and yet open a file of a certain time quickly with wireshark. 
> 
> I am trying to come up with some magic for doing similar with the more
> secure and in base tcpdump without porting the c so if anyone already
> does this then please let me know?
> 
> Thanks, Kc

I think split should work. I love Unix

#!/bin/sh
until /bin/dd if=/dev/zero | split -b 1k
do
/bin/dd if=/dev/zero | split -b 1k
done

-- 
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'Write programs that do one thing and do it well. Write programs to work
together. Write programs to handle text streams, because that is a
universal interface'

(Doug McIlroy)

In Other Words - Don't design like polkit or systemd
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