取数据的前N行

用awk中csv文件中取前1000行出来，代码虽少，很容易出错

BEGIN{
     FS=",";
     OFS=",";
     i=0;
}
{
    i++;
    if(i>999)exit;

    print $1,$2,$3,$4,$5,$6 >> "smalldata.csv";
}
END{
   
}