LinuxQuestions.org - [SOLVED] Read bash script output and note iterations with errors

Hi,

I'm writing a bash script that iterates through a series of websites/records and saves screenshots. If the webpage loads I see this output:

Code:

Fetching http://www.google.com/ ...

 ... done

If there's an issue loading the page:

Code:

Fetching http://www.google.com/ ...

 ... something went wrong

How can I read the output (stdout?) and do something (like append the iteration number to a text file) when the " ... something went wrong" string appears?

I found that I could do this:

Code:

exec >> log.txt

And from there I could just do some sort of grep thing, but I'd like to see the output while the process is running too.

Code:

#!/bin/bash



noExtResrc="Records with no external resources: "



for ((record = 1; record <= 1642; record += 1))

do

        # grep record page for occurance of '&FF=' to determine number of external resources ($numResrcs)

        numResrcs=$(curl -s `printf "http://66.213.57.243:85/record=b100%04d" $record` | grep -c '&FF=')

        

        # if number of resources is > 0

        if [ $numResrcs -gt 0 ]

        then

                printf "RECORD %d\n\n" $record



                for ((i = 1; i <= $numResrcs; i+= 1))

                do

                        resrcName=`printf "b100%04d-%02d-" $record $i`$(curl -s `printf "http://66.213.57.243:85/record=b100%04d" $record` | grep '&FF=' | awk -F\> '{print $2}' | awk -F\< '{print $1}' | head -n $i | tail -n 1 | sed 's/[ \t]*$//')

                        echo "EXTERNAL RESOURCE ($i/$numResrcs)"

                        python /usr/bin/webkit2png -F -W 1024 -H 800 -o "$resrcName" `printf "http://66.213.57.243:85/search~S0?/.b100%04d/.b100%04d/1,1,1,B/l856~b100%04d&FF=&1,0,,%d,0" $record $record $record $i`

                        printf "\n"

                done

                printf "\n\n"

        elif [ $numResrcs -eq 0 ]

        then

                printf "RECORD %d HAS NO EXTERNAL RESOURCE\n\n\n\n" $record

                noExtResrc="$noExtResrc $record, "

        fi

done



echo $( echo $noExtResrc | sed 's/\(.*\)./\1/')