Adding a Startup and Shutdown Script for PCIe-NPL54

Reference

• https://documentation.suse.com/smart/systems-management/html/systemd-management/index.html

• https://unix.stackexchange.com/questions/39226/how-to-run-a-script-with-systemd-right-before-shutdown

• https://www.freedesktop.org/software/systemd/man/latest/systemd.unit.html

---

Overview

• We will create 3 files

  • startup script

  • shutdown script

  • systemd service

• Then we will install the service by additional commands

---

Files

Startup Script

File name: /usr/local/bin/npl54-start.sh

#!/bin/bash

LOG=/var/log/npl54-stopscript.log
/usr/bin/date +"%Y-%m-%d %H:%M:%S" >> $LOG
echo "System is booting up" >> $LOG
echo "" >> $LOG

Shutdown Script

File name: /usr/local/bin/npl54-shutdown.sh

#!/bin/bash


LOCKFILE="/tmp/npl54script.lock"

# Check if the lock file exists
if [ -e "$LOCKFILE" ]; then
    echo "Another instance of the script is already running. Exiting."
    exit 0
fi

# Create a lock file
touch "$LOCKFILE"

LOG=/var/log/npl54-stopscript.log
/usr/bin/date +"%Y-%m-%d %H:%M:%S" >> $LOG
echo "System is shutting down" >> $LOG
echo "" >> $LOG

# Add some script
# 

sudo /usr/bin/pkill -SIGINT NPL54Capture

sudo rm -f $LOCKFILE

Systemd Service

File name: /etc/systemd/system/npl54-start-stop-script.service

[Unit]
Description=NPL54 start and shutdown script
Before=shutdown.target reboot.target halt.target network.target umount.target

[Service]
Type=oneshot
Restart=no
RemainAfterExit=true
ExecStart=/usr/local/bin/npl54-start.sh
ExecStop=/usr/local/bin/npl54-shutdown.sh
StandardOutput=journal
StandardError=journal

[Install]
WantedBy=multi-user.target

---

Service Installation

# Install 
sudo touch /var/log/npl54-stopscript.log
sudo chmod +x /usr/local/bin/npl54-start.sh
sudo chmod +x /usr/local/bin/npl54-shutdown.sh
sudo systemctl disable npl54-start-stop-script.service
sudo systemctl daemon-reload
sudo systemctl enable npl54-start-stop-script.service --now

# Check Status
sudo systemctl status npl54-start-stop-script.service
sudo systemctl list-units --type=service

# Check Log
journalctl -u npl54-start-stop-script.service -f


## For development process: To remove xxx.service
# sudo systemctl disable xxx.service
# sudo rm /etc/systemd/system/xxx.service
# sudo systemctl daemon-reload