Shell script while read line causes the loss of tabs

Description:

Although the problem is not big, it is really disgusting. My goal is to process access logs.

Logs are separated by \ t for easy processing. data needs to be filtered and processed.

I don't want to filter it into a temporary file and then process it. This means that I read more rows.

Reads data in each row and then processes the data.

While read line

Do

Done <$ File

Problem:

However, there is a problem: \ t in line is missing after reading line, and \ t cannot be found during awk processing. At this time, the default Delimiter is space, but the data itself will also have spaces, will be confused

Cause:

After searching, read line filters out spaces and tabs at the beginning and end of a row.

Solution:

Read-R Line