shell逐行读取文件的方法

1、while循环
function while_read_LINE(){
while read LINE
do
echo $LINE
done < $FILENAME
}
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2、重定向法；管道法
function While_read_LINE(){
cat $FILENAME | while read LINE
do
echo FILENAME
While read LINE
Do
echo $LINE
done
exec 0<&<3
}