linux 防止程序重复启动

#!/bin/bash

LOCKFILE="/var/run/my_program.lock"

if ( set -o noclobber; echo "$$" > "$LOCKFILE") 2> /dev/null; then
    trap 'rm -f "$LOCKFILE"; exit $?' INT TERM EXIT

    # 这里放置你的程序启动代码
    echo "Program is running..."
    sleep 10

    trap - INT TERM EXIT
    rm -f "$LOCKFILE"
    echo "Program exited."
else
    echo "Program is already running."
fi

#!/bin/bash

PROCESS_NAME="my_program"

if pgrep -x "$PROCESS_NAME" > /dev/null; then
    echo "Program is already running."
else
    echo "Starting program..."
    # 启动程序的实际命令
    ./my_program &
fi

[Unit]
Description=My Program Service
After=network.target

[Service]
ExecStart=/path/to/my_program
Restart=on-failure
StartLimitIntervalSec=60
StartLimitBurst=3

[Install]
WantedBy=multi-user.target

#!/bin/bash

(
    flock -n 200 || exit 1
    # 这里放置你的程序启动代码
    echo "Program is running..."
    sleep 10
) 200>/var/run/my_program.lock