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emulate -L zsh
setopt extendedglob cbases
if [[ $# -ne 1 ]]; then
print "Usage: $0 port
Listen on the given port; send anything that arrives to standard output." >&2
return 1
fi
local REPLY lfd afd
if ! ztcp -l $1; then
print "Failed to listen on port $1" >&2
return 1
fi
lfd=$REPLY
if ! ztcp -a $lfd; then
print "Failed to accept on fd $lfd" >&2
ztcp -c $lfd
fi
afd=$REPLY
cat <&$afd
ztcp -c $lfd
ztcp -c $afd
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