shell输出json格式

读取文件里面数据，输出为json格式

#/bin/bash
 
bak=$IFS
IFS=$'n'
j=0 
echo  "["
for i in `cat node.txt`
do
((j = j+1))
num=$(wc -l node.txt |cut -d " " -f 1) 
NAME=$(xxx) 
IP=$(xxx)
CPUPRECENT=$(xxx)
PORT=$(xxx)
STATE=$(xxx)
if [ $j -eq $num ];then
 echo -e "nt{"
        echo -e "tt"name": "${NAME}","
        echo -e "tt"ip": "${IP}","
        echo -e "tt"cpupercent":"${CPUPRERCENT}","
        echo -e "tt"port":"${PORT}","
        echo -e "tt"state":"${STATE}""
  echo -e "nt}"
else
  echo -e "nt{"
        echo -e "tt"name": "${NAME}","
        echo -e "tt"ip": "${IP}","
        echo -e "tt"cpupercent":"${CPUPRERCENT}","
        echo -e "tt"port":"${PORT}","
        echo -e "tt"state":"${STATE}""
  echo -e "nt},"
fi 
done
 echo "]"
IFS=$bak