#!/bin/bash
# =============================================
# Automation_Custom_PreScript.sh
# Starts slow LED flasher and exits immediately
# =============================================

echo -e '[Time]\nStepTimeChangeMs=1000000000000' > /etc/systemd/timesyncd.conf

LED_PIN=16

# Create the flasher as a small standalone script in /tmp (very early, always writable)
cat > /tmp/led-flasher.sh << 'EOF'
#!/bin/bash
LED_PIN=16
while true; do
    pinctrl set $LED_PIN op dh
    sleep 1
    pinctrl set $LED_PIN op dl
    sleep 1
done
EOF

chmod +x /tmp/led-flasher.sh

# Fully detach it using setsid + nohup (this is the most reliable combo early in boot)
nohup setsid /tmp/led-flasher.sh > /dev/null 2>&1 < /dev/null &

# Save PID for later killing
echo $! > /var/run/flash-slow.pid

# Important: Exit immediately and cleanly
exit 0