#!/bin/bash

setglobal command = '"printf 'a\nb\nc\n''"
mkfifo first
mkfifo rest0
shell {eval $command | tee $[head -1 > first] | tail -n +2 > rest0 &}

cat first

mkfifo rest1
shell {cat rest0 | tee $[head -1 > first] | tail -n +2 > rest1 &}

cat first

mkfifo rest2
shell {cat rest1 | tee $[head -1 > first] | tail -n +2 > rest2 &}

cat first

mkfifo rest3
shell {cat rest2 | tee $[head -1 > first] | tail -n +2 > rest3 &}