Read lines till a blank line is encountered - UNIX for Dummies Questions & Answers

saurabhsinha23 · #1 (**permalink**) 12-19-2007

Hi,

I have reached at a specified offset from the start of file. My requirement is that I want to read only those lines, which have the string READ / ALTER / UPDATE. As soon as, none of these literals are found in the subsequent line, I want to stop reading. Is there any feature of grep which can help me do this?

I saw one post in which someone has suggested using sed command. I could not follow it.

Please suggest.

tail -n $remPart filename.txt | head -n 100 | ............

The part in red is what I want. This should ideally be the terminating condition..
TIA
Saurabh

porter · #2 (**permalink**) 12-19-2007

Taking what you said literally....

Code:

while read N
do
        case "$N" in
        *READ* | *ALTER* | *UPDATE * )
              ;;
        * )
            exit
            ;;
        esac
done

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