Monitor FIFO pipe with Bash

client.sh

#!/bin/bash
echo -en "${@}\x04" > /tmp/fifo_queue

monitor.sh

#!/bin/bash
pipe="/tmp/fifo_queue"

trap "rm -f '${pipe}'" EXIT

bytes=""
while true; do
    IFS= read -r -d $'\4' bytes 2> /dev/null
    if [[ -z "$bytes" ]]; then
        sleep 0.1
        continue
    fi
    
    echo "'$bytes'"
done < $pipe

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