Is there a tool that beeps and highlights matching lines that are piped through it, while displaying everything

Question

Is there a tool that will let me pipe the output of an executable through it and play a sound or, better yet, highlight the line where a selected phrase occurs?

I want to be able to do something like this:

./myProgWithLotsOfOutput  | ./myMysteryTool blahUsefulWord

and have all of the output appear and scroll by, but any time "blahUsefulWord" appears, the console beeps and highlights that line.

It's kind of a mix of tee and grep. Alternatively, do you have the BASH skills to whip something like this up?

Answer 1

For Bash >= version 3.2:

regex='some regex pattern'
highlight=$(tput setaf 2) # green, use setab to do inverse instead of foreground
off=$(tput sgr0)
while read line
do
    [[ $line =~ $regex ]] && echo -n $'\07'"$highlight"
    echo "$line$off"
done

It highlights the whole line rather than just the match.

Answer 2

Based off of this Q&A, I've created the following function:

# mylite since 'highlight' is already a program
function mylite () {
    pattern=$1; shift; file=$1
    grep -E --color "$pattern|$" $file
}

Usage examples:

mylite pattern file.txt
cat file.txt | mylite pattern

No beeping in this example, but I'm sure that can be added by modifying grep as shown by other answers on this page.

Answer 3

My mistake on the answer. I tried this:

PATTERN="something"
export GREP_COLOR='1;37;41' # set to a sequence of xterm escape sequences for colorization.
export GREP_OPTIONS=--color=always

while read LINE
do
    echo $LINE | grep $PATTERN || echo $LINE
done

Answer 4

Something like logwatch may be what you are looking for.