Hello all. I am new to this forum and also very new to using grep - so please excuse me if this question is not in the correct forum and/or is not pertinent to this website.

I use greps like this:

gunzip -c L:\System1\SailLogger_20071019* L:\System2\SailLogger_20071019* L:\System3\SailLogger_20071019* | grep 35=Order

It is very strange and unusual for a gzipped log to be continually appended to. Are you sure all of these logs are already compressed?

Hi Thanks for replying. Yes these logs are updating every 30 seconds. I tried this grep -

gunzip -c L:\System1\SailLogger_20130118* L:\System2\SailLogger_20130118* L:\System3\S
ailLogger_20130118* | grep 35=SailErrorNotice

and got results for System1 logs but then received this message -


gunzip: L:\System1\SailLogger_2013011813.tlg.gz: unexpected end of file

And in case it matters, I am running these greps in a windows environment.

I just noticed that you're unzipping the same thing three times in a row:

L:\System1\SailLogger_20130118*
L:\System2\SailLogger_20130118*
L:\System3\SailLogger_20130118*

Hi. Yes. Each path has a differnt log (System1,2,3) that follows the same naming convention.

Do you know about the zgrep command (cf. man zgrep):

Pardon my blind eyes, I don't know how I missed that.

Anyway. If this code is for a real shell and not windows cmd, I'd try this:

for FILE in L:\System1\SailLogger_20130118* L:\System2\SailLogger_20130118* L:\System3\SailLogger_20130118*
do
        gunzip < "$FILE"
done | grep 35=SailErrorNotice