使用 Shell 脚本检查进程 [英] Check Process using Shell Script

问题描述

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.

I am developing a Java program which checks the running processes, if not start that process. In my context I am executing the .sh file which is like this.

#!/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?

But it's not working. What's the problem?

推荐答案

使用测试表达式有效.希望这会有所帮助！！

Using the test expression works. Hope this helps !!

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

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