#!/bin/bash
echo "tftf"
true | false | true | false
RC=( "${PIPESTATUS[@]}" )
echo "RC[0] = ${RC[0]}"         # true = 0
echo "RC[1] = ${RC[1]}"         # false = 1
echo "RC[2] = ${RC[2]}"         # true = 0
echo "RC[3] = ${RC[3]}"         # false = 1

echo "ftft"
false | true | false | true
RC=( "${PIPESTATUS[@]}" )
echo "RC[0] = ${RC[0]}"         # true = 0
echo "RC[1] = ${RC[1]}"         # true = 0
echo "RC[2] = ${RC[2]}"         # false = 1
echo "RC[3] = ${RC[3]}"         # false = 1

echo "fftt"
false | false | true | true
RC=( "${PIPESTATUS[@]}" )
echo "RC[0] = ${RC[0]}"         # false = 1
echo "RC[1] = ${RC[1]}"         # false = 1
echo "RC[2] = ${RC[2]}"         # true = 0
echo "RC[3] = ${RC[3]}"         # true = 0