mjhjmtu

I am trying to create a graphical program for my script.

Inside the script I use tar to create a tar archive.

From the graphical program I get the full name of file that I want to create a tar archive.

tar -cvf temp.tar /home/username/dir1/dir2/selecteddir 

My tar archive includes home, username, dir1, dir2 and selecteddir while i want tar to create archive only including selecteddir.

You can use the -C option of tar to accomplish this:

tar -C /home/username/dir1/dir2 -cvf temp.tar selecteddir

From the man page of tar:

-C directory
 In c and r mode, this changes the directory before adding the following files. 
 In x mode, change directories after opening the archive but before extracting 
 entries from the archive.

There are two methods that you can use to approach this problem.

The first one, in my opinion, is easier. Simply cd into directory directly above the one you want to compress. In this case it would be dir2.

$ cd /home/username/dir1/dir2/
$ tar -cvf temp.tar selecteddir

The second way is to use the option --transform which takes a sed expression and runs it against the files names. Note: you will have to escape / in the sed expression.

$ tar -cvf temp.tar /home/username/dir1/dir2/selecteddir --transform='s//home/username/dir1/dir2///g'

First, go to the working directory,

cd /your/working/directory/ 

Then use magic * :-)

tar -cvf temp.tar *

Actually, I found a problem using Ketan's answer

tar -C /home/username/dir1/dir2 -cvf temp.tar selecteddir

When you want to just copy all files just in dir2, just all files then I first come out the idea:

tar -C /home/username/dir1/dir2 -cvf temp.tar *

However, when you are not in dir2 directory, it would cause problem since * would tar files in your current diectroy. And I fixed the problem using command below:

 tar -C /home/username/dir1/dir2 -cvf temp.tar ./