求助，在shell中获取进程id，会获取到完全不存在的pid，不知道为什么

[文气东来]

while getopts ":M:" opt
do
    case $opt in
        M)
        MAINCLASS=$OPTARG
        ;;
        ?)
        echo "Illegal option,please read README.md"
        exit 1;;
    esac
done

MAINCLASS=com.test.auto.main.AutoMain
PROJECTNAME=test_auto_main
stopByName(){
        #Get project PID
#       if [ $PROJECTTYPE = class ];then
#               STOPNAME=$MAINCLASS
#       elif [ $PROJECTTYPE = jar ] || [ $PROJECTTYPE = main ];then
#               STOPNAME=$PROJECTNAME
#       else 
#               echo line:$LINENO illegal paramter
#       fi
#       echo $STOPNAME
        current_pid=$( ps -ef|grep $MAINCLASS |grep -v grep | awk '{print $2}' | awk -F"/" '{ print $1 }' )
        echo line:$LINENO $current_pid
        if [ $current_pid ];then
                echo Now the application is running, close the application first
                #This is the easiest way to stop a project. If there is a better way to stop a project, it can be changed
                kill -9 $current_pid
        fi
}

stopByName

shell执行的目的是根据我输入的字符串找到对应的进程杀死

这样执行时返回结果为

[root@localhost new]# sh deploy1.sh   -M asfasfa
line:26

但是如果我找自己运行的程序时，此时程序还未运行，但还是获取到了未知的pid

[root@localhost new]# sh deploy1.sh   -M com.test.auto.main.AutoMain
line:26 24685 24686
deploy1.sh: line 27: [: 24685: unary operator expected

执行以下命令可以看出，我的程序的确没有运行

[root@localhost new]# ps -ef|grep com.test.auto.main.AutoMain |grep -v grep | awk '{print $2}' | awk -F"/" '{ print $1 }'       
[root@localhost new]# 

这是什么原因引起的呢？

[文气东来]

顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶顶

[文气东来]

while getopts ":p:o:s:hH:m:j:t:l:L:P:n:O:S:M:a:" opt
do
    case $opt in
        M)
        M=$OPTARG
        ;;
        ?)
        echo "Illegal option,please read README.md"
        exit 1;;
    esac
done

#MAINCLASS=com.test.auto.main.AutoMain
echo $M
current_pid=$( ps -ef|grep $M |grep -v grep | awk '{print $2}' | awk -F"/" '{ print $1 }' )
echo line:$LINENO $current_pid

我整理了一下代码，发现只要字符串从外面指定并生效，就一定会出现此问题

[root@xd-vdn-liveback-01 yuewendong]# sh deploy3.sh -M aasgsdgsr

aasgsdgsr

line:16 5593 5594

[yolyry]

先去掉-M试试