Shell Programming and Scripting

Hi all,

I have a requirement where i have to read multiple files using Shell Script in Korn Shell.

each file will have the 3rd line as the amount field, i have to read this amount field and sum it for all the files.

any idea on how to achieve this?? (i think i can achieve it using a loop, getting the number files and using a loop for all the files and sum the amount)

any simpler approach than this??

the number of files to be read may vary.

highly appreciate your help.

Thanks,
Naren

create a file with all of the filenames you need to access, call it filenames.txt

Code:

awk '{ if (FNR==3) {sum+=$0} } END {print sum} ' $(cat filenames.txt)

This assumes that the amount field is the whole line on line #3.

It also assumes that there are no filenames with whitespace in filenames.txt.

one thing is number of files are not fixed and the 3rd line contains text as
"Total amount = 8792187481274"

i need to read the number part and sum it for all the files based on the pattern present in a the given directory.

Code:

awk 'FNR==3 {sum+=$4} END {print sum} ' /path/to/dir/PATTERN

how do we specify the delimiter here...from the code above i can make out that Space has been assumed to be the delimiter..

but if i have something other than space than how do i modify it??