Shell Programming and Scripting

Hi, I am a newbie at Unix scritping, and I have a question.

Looking at the search functionality on Unix. Here I have a structure
root---------dir1 ------- file1, file2, file3
|_____dir2 ______file1@, file4
|_____dir3_______file1@, file5

Under root directory, I have directory dir1, dir2 , and dir3. In dir1, I have file1, file2, and file3. Under dir2, I have a hard link of file1, and file4. Under dir3, I have a symbolic link of file 1, and file5.

My queries are:
" find all the files that under dir1, but not under dir2 and dir3"
" find all the files that under dir2, but not dir3"
"find all the files that in both dir1, dir2, and dir3"

Would unix scripting be able to do that?

This may sound a bit of naive method, but thats the immediate solution i can think for.
The script below solves your case 1. You can similarly write script for case 2 and 3.

## find all files that are under dir1, but not under dir2 or dir3
for k in `ls dir1`
do
if [ -f dir2/$k -o -f dir3/$k ]
then
echo "$k present in dir2 or dir3, so ignore"
else
echo "list this one $k"
fi
done

I tried the script. I got the following error:

for: Command not found
k: Undefined variable

Also another question is if I give the hard link or the symbolic link of file1 another name, file6 and file7, will the above scripting work?

The new structure is as follows:
root---------dir1 ------- file1, file2, file3
|_____dir2 ______file6@, file4
|_____dir3_______file7@, file5

Thank you.

hmm, for doesnt work, what shell are you using.
basically in the above script the check

" if [ -f ...."

checks for the existence of a file with that name. To check if the file is of a particular type like a link, directory or character special command, see the man page for "test" and use the appropriate flags. for eg for a symbolic link, you can test it as "-h".

The above script works for k-shell and bash shell too.

if you are very very new to shell scripting I will suggest you to do some reading first.

I use tcsh. I checked and "foreach" instead of "for", "( )" instead of "[ ]" works in tcsh. Anyways, I tried bash, and the script is running now. Thanks for the help.