Shell 脚本的一些常用语法分析

#!/bin/sh

echo "
 *************************************
 *          Author by gomyck         *
 * --------------------------------  *
 *|  qq:    474798383              | *
 *|  email: hao474798383@163.com   | *
 *|  blog:  https://blog.gomyck.com| *
 * --------------------------------  *
 *************************************
 "

JAVA_HOME=
RESOURCE_NAME=*.jar
LOG_PATH="/dev/null"
BACK_PATH=
XX_INFO=
ACTIVE=none
CK_RANDOM="gomyck.$RANDOM.$RANDOM"
GREP_RANDOM="gomyck.none"
OLD_RANDOM=`cat rdm`
if [ $? == 0 ]; then 
    GREP_RANDOM=${OLD_RANDOM} 
fi
PARAM_VALUE='-Dfile.encoding=UTF-8 -Deureka.instance.ip-address= -Djasypt.encryptor.password='
while [ -n "$1" ]
do
    case "$1" in
         -param | -p)
            PARAM_VALUE="$2"
            echo "系统属性配置: $2"
            shift ;;
         -xx | -x)
            XX_INFO="$2"
            echo "虚拟机非标准选项配置: $2"
            shift ;;
        -back | -b)
            BACK_PATH="$2"
            echo "文件备份位置: $2"
            shift ;;
        -log | -l) 
			LOG_PATH="$2"
            echo "日志输出位置: $2"
            shift ;;
        -active | -a) 
			ACTIVE="$2"
            echo "激活配置: $2"
            shift ;;
        --) shift
            break ;;
        *) ACTIVE="$1";;
    esac
    shift
done

if [[ ${ACTIVE} != "pro" && ${ACTIVE} != "dev" && ${ACTIVE} != "test" ]]; then
    echo "Please input a profile you want active -> [dev pro test]"
    exit
fi
if [[ ${ACTIVE} ==  "test" || ${ACTIVE} ==  "dev" ]]; then
	echo "开发测试环境, 日志默认输出位置: ./gomyck.log"
	LOG_PATH="gomyck.log"
fi

tpid=`ps -ef|grep $GREP_RANDOM|grep -v grep|grep -v kill|awk '{print $2}'`
if [ ${tpid} ]; then
    echo Elegant Close Application... ${tpid}
    kill -15 $tpid
fi

sleep 5

tpid=`ps -ef|grep $GREP_RANDOM|grep -v grep|grep -v kill|awk '{print $2}'`
if [ ${tpid} ]; then
    echo  Hard Close Application... ${tpid}
    kill -9 $tpid
else
    echo Close Success!
    echo Bootstrap Application...
fi

rm -f rdm
rm -f tpid

if [ ${BACK_PATH} ]; then
    if [ ! -d ${BACK_PATH}  ];then
      mkdir $BACK_PATH
    fi
    cp -f ./*.jar $BACK_PATH
fi

if [ ${JAVA_HOME} ]; then
    nohup $JAVA_HOME/bin/java -jar $PARAM_VALUE $XX_INFO -Dspring.profiles.active=${ACTIVE} -DckFlag=${CK_RANDOM} ./$RESOURCE_NAME > ${LOG_PATH} 2>&1 & 
else
    nohup java -jar $PARAM_VALUE $XX_INFO -Dspring.profiles.active=${ACTIVE} -DckFlag=${CK_RANDOM} ./$RESOURCE_NAME > ${LOG_PATH} 2>&1 & 
fi

echo ${CK_RANDOM} > rdm
echo $! > tpid
echo Application is Running!!!

if [[ ${ACTIVE} ==  "test" || ${ACTIVE} ==  "dev" ]]; then
	tail -f gomyck.log
fi