linux pidfile生成

#!/bin/bash

# 启动服务的命令
start_service() {
    echo "Starting service..."
    my_service &
    echo $! > /var/run/my_service.pid
}

# 停止服务的命令
stop_service() {
    if [ -f /var/run/my_service.pid ]; then
        kill $(cat /var/run/my_service.pid)
        rm /var/run/my_service.pid
        echo "Service stopped."
    else
        echo "Service is not running."
    fi
}

case "$1" in
    start)
        start_service
        ;;
    stop)
        stop_service
        ;;
    restart)
        stop_service
        start_service
        ;;
    *)
        echo "Usage: $0 {start|stop|restart}"
        exit 1
        ;;
esac

[Unit]
Description=My Service

[Service]
ExecStart=/path/to/my_service
PIDFile=/var/run/my_service.pid
Restart=always

[Install]
WantedBy=multi-user.target

sudo systemctl enable my_service
sudo systemctl start my_service