UNIX for Dummies Questions & Answers

I have a stream of data come to a server and store in a file (datafile). This stream of data contain a lot of information. Data could come in every second or different frequency of times.

I like to retrieve a certain text string as the data come in. All data information will come with the time stamp (year-month-date-hour-minute-second). Let's say that I want to retreive the text string "yes, this is yet!" What would be the best way to do this? I have some like this in mind and I am looking for more input.

#!/bin/ksh
DAY=`date +%y%m%d`
H=`date +%H`
M=`date +%M`
S=`date +%S`
while read datafile
do
grep "$DAY-$H-$M-$S" | cgrep "yes, this is yet" > filewithdata-$H-$M-$S
done

I am looking for an un-ending-whileloop that will give me the text string I want and write it to a file with Hour-Minute-Second time stamp for that file.

Please advise

I think that this script will do the trick, just start the script like

Code:

for ((;;)); do your-script.sh; sleep 5; done &

- this will call the script every five seconds. There may be other approaches too, but that's what I have in mind now. HTH.