Not sure if this is a bug or a limitation but this works:
# echo a | ( exec {fd}>/path/to/regular/file; tee /dev/fd/"$fd" )
While this produces a "No such device or address" error:
# echo a | ( exec {fd}>/dev/tcp/host/port; tee /dev/fd/"$fd" )
Simpler forms like this does the same:
# echo a | tee /dev/fd/4 4>/dev/tcp/host/port
# echo a | ( tee /dev/fd/4 ) 4>/dev/tcp/host/port
The workaround is to use process substitution and cat:
# echo a | tee >( cat > /dev/tcp/host/port )
Tested in 5.1.4.
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konsolebox
