I wrote a script that listens for commands from a FIFO and collects couple of files for debugging on my raspberry pi, all working fine until i decided to write a systemd unit file for it. running systemctl start crashcollector will start the script but it never reads anything from the pipe it's running but not doing anything, systemctl stop crashcollector takes forever to stop the service so i'm guessing something wrong with my unit file even though i wrote many that work just fine.

bash script:

#!/bin/bash

collectCrashReport() {
    # teleport to cache dir
    cd /mnt/cache
    # remove any previous report
    rm -rf crash/crashreport_*
    # create report directory
    directory=crashreport_`cat /etc/hostname`_$(date +%Y%m%d%H%M%S)
    mkdir $directory
    cd $directory
    # snatch all the logs
    cp -r /var/log/ .
    ps --no-headers -ax > processes.dump
    # dump dmesg to file 
    dmesg > dmesg.dump
    # create crash dir
    mkdir crash
    # zip the whole thing
    zip -qr /mnt/cache/crash/"$directory.zip" .
    # remove collection dir
    rm -rf /mnt/cache/crashreport_*
    # done and done
}

# check if already running and kill
PIDFILE=/var/run/crashcollector.pid
# check if already running
if [ -f $PIDFILE ]; then
    kill `cat $PIDFILE`
fi
echo $$ > $PIDFILE

cleanup() {
    rm -f $PIDFILE
    exit 0
}
# trap them signals 
trap "cleanup" INT TERM EXIT

that_awesome_pipe="CCPipe"
[ -p $that_awesome_pipe ] || mkfifo $that_awesome_pipe
chmod 766 $that_awesome_pipe
while :; do
    if read line; then
        case $line in
        "collect")
            collectCrashReport
            ;;
        *)
            log "Received bad command $line, ignoring..."
            ;;
        esac    
    fi
done <"$that_awesome_pipe"

Systemd unit file:

[Unit]
Description=Crash report collector
After=network.target

[Service]
Type=simple
ExecStart=/usr/bin/crashCollector
ExecStop=/usr/bin/kill -9 `cat /var/run/crashcollector.pid`
KillMode=process
Restart=always
RestartSec=3

[Install]
WantedBy=multi-user.target

not sure what exactly i'm missing here removing that if read line block makes everything work just fine.