Hello !

I want to process a text file in order to extract desired data using sed and grep... Now I am facing a problem piping to grep... nothing happens..
The text consists of blocks of 3 lines that may (or not) contain the Desired data.

the desired data is on each 2 first lines of some 'blocks'.. so I started by using the following so as to join the desired 2 lines in 1 (and skip the 3rd) in order to use it after with grep/sed :

Code:

#!/bin/bash
#script.sh
(while read line;
do
    read line2;
    read line3;
    echo $line $line2;
done)

Now I want to select only the lines containing the "DesiredInfo", for that I thought simply of adding a pipe to grep after the preceding code:

Code:

| grep DesiredInfo

but.. it doesn't work like that...(nothing happens) so I thought of putting directly in the shell prompt instead of the script:

but then again, nothing happens...
Is there a problem with piping to 'grep' ?

thank you for your precious help !!