Shell Programming and Scripting

Hi all
I am in a small problem pl help me out.
I am having a directory having ZIP files with name starting as :
01.xyz
02.pqr
and so on
I want to run the script-
cat myfile | awk '{print $1, $2}' | while read var1 var2
do
zcat $var2* | grep "^000$var1" >> my_output
done
Where the myfile contains like :
1231231 01
1451515 02
i.e. I want to substitute the var2 for ZIP files in the directory and then search the var1 in that file. But It gives error *.Z : no such file or directory.
Please help me out.
Thanks in advance.

Hi,
Did you miss the extension after the var2...
do
zcat $var2*.zip | grep "^000$var1" >> my_output
done

Because i was able to do the same successfully.
Thanks
Raghuram

I tried with extension also but it does not work and gives the same error. Moreover i think attaching the extension will not make any difference.

One question...

Are you sure the files are with extension .zip? or .gz?

cat myfile | awk '{print $1, $2}' | while read var1 var2
do
zcat $var2*.gz | grep "^000$var1" >> my_output
done

Files are with ext .Z ( must be zip files created using compress command)
trying *.Z or *.gz not working. Where is the error???

First simplify your code removing unnecessary commands -

Code:

while read var1 var2 
do
zcat ${var2}* | grep "^000$var1" >> my_output
done <myfile

Check if it works. Didnt have time to simulate it. . Make sure you are in the same directory as the zip files. Otherwise, your 'myfile' should contain the path or you should hardcode the path.

When you use:
zcat $var2* | grep "^000$var1" >> my_output

It is actually translated to something like this:

zcat 01* | grep ....

So, there is the issue.

If you know that your $var2 contains the exact file name, then remove the "*". Use

zcat $var2 | grep "^000$var1" >> my_output

You can also use the file extension to be safe i.e "zcat $var2.zip".

Or if $var2 doesn't contain the exact file name then try using double quotes around $var*. Like

zcat "$var2*" | grep "^000$var1" >> my_output

Hope this helps.