shell 守护进程

#!/bin/sh
#守护进程，接受2个参数
#para CMD 执行的命令
#pare ID 唯一标识改命令

if [ "$1" = "" -o "$2" = "" ];then
echo "USAGE:deamon.sh CMD ID"
exit 100
fi

#创建文件夹
mkdir -p ./var
CMD=$1
ID=$2

#守护循环
while [ 1 ]
do
#执行命令
$CMD &
echo "`date +'%Y%m%d %H:%M:%S'`\t$CMD Is Start"
#获取进程id并保存
pid="$!"
echo $pid > ./var/$ID.pid
echo "pid is $pid"
wait $pid
echo "`date`\t$CMD Is Stop"
sleep 1
done