I Unix bash shell script how to check for "ERROR" within a .LOG file?

In the Unix bash shell script, what would be an example of searching within Unix directory for a file ("sasprog1.LOG") and then checking for an ERROR within "sasprog1.LOG" file and then opening another file ("file1.txt") and then writing some messages to "file1.txt" file?

Please note: "file1.txt" may or may not exist in the Unix directory. "sasprog1.LOG" does exist in the Unix directory.

Any examples or comments on this will be very appreciated!!
labradorchikAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

woolmilkporcCommented:
if grep -q "ERROR" sasprog1.LOG ;
   then echo "Error found in sasprog1.LOG" > file1.txt
fi
0
labradorchikAuthor Commented:
Can this be done in any other way?
0
woolmilkporcCommented:
find /start/dir -type f -name "sasprog1.LOG" |while read file
  do
    RESULT=$(grep "ERROR" $file)
      if [[ ! -z $RESULT ]]
         then
            echo "Error(s) in $file: $RESULT" >> file1.txt
     fi
  done
0
Big Business Goals? Which KPIs Will Help You

The most successful MSPs rely on metrics – known as key performance indicators (KPIs) – for making informed decisions that help their businesses thrive, rather than just survive. This eBook provides an overview of the most important KPIs used by top MSPs.

labradorchikAuthor Commented:
woolmilkporc, thank you for your example!
Question:
Would it work with referencing specific directories like in this example?  

mydir=/start/dir

find $mydir -type f -name "sasprog1.LOG" |while read file
  do
    RESULT=$(grep "ERROR" $file)
      if [[ ! -z $RESULT ]]
         then
            echo "Error(s) in $file: $RESULT" >> file1.txt
     fi
  done

Open in new window

0
woolmilkporcCommented:
Yes, of course.

You can also have the filenames as variables, as well as the search string.
mydir="/start/dir"
filename="sasprog1.LOG"
search="ERROR"
outfile="file1.txt"

find "$mydir" -type f -name "$filename" |while read file
  do
    RESULT=$(grep "$search" "$file")
      if [[ ! -z $RESULT ]]
         then
            echo "Error(s) in $file: $RESULT" >> "$outfile"
     fi
  done

Open in new window



Please don't be astonished about the many quotation marks - you only have to use them if you suspect embedded spaces or special characters being present in the respective strings.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
labradorchikAuthor Commented:
This is great!!  Exactly what I was looking for! Thank you!!
Could you please also check out another question that I have at:  http://www.experts-exchange.com/OS/Unix/Q_27644555.html
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Unix OS

From novice to tech pro — start learning today.