[SOLVED] Read From Pipe in Bash Script

Issue

I've got a Bash script which is only ever going to be invoked via a pipe. I'm curious what's the best way to read the data from the pipe? The command will look like:

$ output_gen | process

My script is process. This is not homework, but it is a learning exercise.

Solution

When your program is receiving data from a pipeline, it's received via stdin. To read from stdin, use the read builtin. Here is an example:

myprog:

while read -r line; do 
    <something with "$line">
done

command:

printf 'foo\nbar\n' | ./myprog

Answered By - jordanm

Answer Checked By - Timothy Miller (WPSolving Admin)