java - 使用 Shell 脚本检查进程

Question

我正在开发一个 Java 程序，它检查正在运行的进程，如果没有启动该进程。在我的上下文中，我正在执行这样的 .sh 文件。

#!/bin/sh
echo "Hello World..."
cnt=`ps -eaflc --sort stime | grep clientApplication.jar | grep -v grep | wc -l`
if [ $cnt = 3 ] 
then
        echo "Services for Pigeon are already running..."
else
        echo "Starting Services for Pigeon..."
        echo `java -jar clientApplication.jar`
fi

但它不起作用。有什么问题？

Answer 1

使用测试表达式有效。希望这有帮助!!

echo "Hello World"
cnt=`ps -eaflc --sort stime | grep clientApplication.jar |grep -v grep | wc -l`
if(test $cnt -eq 3) ;
then
    echo "Services for Pigeon are already running..."
else
    echo "Starting Services for Pigeon..."
    echo `java -jar clientApplication.jar`
fi