Use content of a pipe as text for --text=

[Wolfgang Stey]

Good morning,
I would like to use the contents of a pipe as text for
--text= in a yad-paned.
It's probably quite simple, but I've just got a block.
I would be very happy about a little food for thought.
Wish everyone a nice day.
Greating Wolfgang

My code:
#! /bin/bash
export ausgabe_cmd='@bash -c "ausgabe"'
export meika=$(mktemp -u --tmpdir chmod.XXXXXXXX)
mkfifo $meika
trap "rm -f $meika" EXIT
fkey=$(($RANDOM * $$))

function ausgabe
{
befehl="echo Hallo Welt"
bash -c "$befehl" >"$meika"
}
export -f ausgabe
exec 8<> $meika

yad --plug="$fkey" \
    --tabnum=1 \
    --form \
    --field="Ausgabe:fbtn" "$ausgabe_cmd" &

yad --plug="$fkey" \
    --tabnum=2 \
    --text="Ausgabe="$@ <&8 "$meika" & #<<< My Problem, i like to set --text= with contents from pipe $meika

yad --key="$fkey" \
    --paned \
    --button="yad-close:1" --orient=Horizotal \
    --splitter=100 \
    --width=300\
    --height=60
return="$?"
case "$return" in
1|252)
    unset ausgabe_cmd ausgabe
    exec 8>&-
    exit 0
    ;;
esac