Shell脚本实现检测进程是否正在运行

#!/bin/bash
ps_out=`ps -ef | grep $1 | grep -v 'grep' | grep -v $0`
result=$(echo $ps_out | grep "$1")
if [[ "$result" != "" ]];then
    echo "Running"
else
    echo "Not Running"
fi

17:38:07-androidyue~/osc_git/shell_works (master)$ ./checkRunningProcess.sh 'SimpleHTTPServer'
Running