Shell脚本中的杀死进程 [英] Killing process in Shell Script

问题描述

我有一个非常简单的问题:运行shell脚本时，我启动了一个程序 在无限循环中运行.过了一会儿我想停下来然后我可以 再次使用不同的参数.现在的问题是我如何找出 该程序在我执行的时候?基本上，我想做这样的事情:

I have a very simple problem: When I run a shell script I start a program which runs in an infinite loop. After a while I wanna stop then this program before I can it again with different parameters. The question is now how do I find out the pid of the program when I execute it? Basically, I wanna do something like that:

echo "Executing app1 with param1"  
./app1 param1 &  
echo "Executing app1"  
..do some other stuff  
#kill somehow app1
echo "Execution of app1 finished!"

谢谢！

推荐答案

在大多数shell(包括Bourne和C)中，您在后台启动的最后一个子进程的PID将存储在特殊变量$！中. >

In most shells (including Bourne and C), the PID of the last subprocess you launched in the background will be stored in the special variable $!.

#!/bin/bash
./app1 &
PID=$!
# ...
kill $PID

特殊变量"部分下有此处的一些信息.

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