Shell实现判断进程是否存在并重新启动脚本

简洁版：

    #! /bin/bash
    # author caoxin
    # time 2012-10-10 
    # program : 判断进行是否存在，并重新启动


    function check(){
      count=`ps -ef |grep $1 |grep -v "grep" |wc -l`
      #echo $count
      if [ 0 == $count ];then
        nohup python /runscript/working/$1 &
      fi
    }

    check behaviors.py

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详细版：

    #!/bin/bash
    #

    #调用关闭jboss进程脚本
    stopMethodServer.sh

    #打印出当前的jboss进程：grep jboss查询的jboss进程，grep -v "grep" 去掉grep进程
    jmsThread=`ps -ef | grep gdms | grep jboss | grep -v "grep"`
    echo $jmsThread

    #查询jboss进程个数：wc -l 返回行数
    count=`ps -ef | grep gdms | grep jboss | grep -v "grep" | wc -l`
    echo $count

    sec=7
    #开始一个循环，以判断进程是否关闭

    for var in 1 2
    do
     if [ $count -gt 0 ]; then
      #若进程还未关闭，则脚本sleep几秒
      echo sleep $sec second the $var time, the JMS thread is still alive
      sleep $sec
     else
      #若进程已经关闭，则跳出循环
      echo "break"
      break
     fi
    done

    #if [ $count -eq 0 ]; then
    # echo "nohup startMethodServer.sh &"
    # nohup startMethodServer.sh &
    #else
    # echo "It's better to check the thread!!!"
    #fi

    #调用启动脚本
    nohup startMethodServer.sh &