Ethereal-dev: [Ethereal-dev] Reading a capture file from stdin is really working?!?

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From: Ulf Lamping <ulf.lamping@xxxxxx>
Date: Sat, 07 Jan 2006 13:28:21 +0100
Hi List!
I'm wondering, if reading (not capturing) from a stdin is actually working?!? 

I've found some parts in the sources which suggests that it's implemented.

But for example:

cat -B dhcp.pcap | ./tethereal -r - -w ./testout.pcap
doesn't seem to work, as reading a capture file requires to seek to the start of a capture file. As it isn't possible for a pipe to seek, this must fail.
There are a lot of file_seek() calls in the wtap_open_offline() and the various sub functions (e.g. libpcap_open), so I don't think this will work. 

Do I miss a point here?

Regards, ULFL