tar question: adding to "fake" subdirectory

[Matthew Cornell]

Hi Folks,

I'm using tar (GNU tar) 1.13.17. I'm relatively new to tar and I have
a question: I'm trying to get tar to add a file under a "fake"
subdirectory in the new archive, such as described in the info
manual. For example, what I'd like to do is something like this:
Assume "."  contains s1/, and s1 contains "t.txt":

    .
    ./s1
    ./s1/t.txt

I would like to add t.txt under the directory "s2" instead of
"s1". However, the documentation for this feature has an error:

    File: tar.info,  Node: directory,  Next: absolute,  Up: one
    ...
       Contrast this with the command,

         $ tar -c -f jams.tar grape prune -C food red/cherry

    which records the third file in the archive under the name `red/cherry'
    so that, if the archive is extracted using `tar --extract', the third
    file will be written in a subdirectory named `orange-colored'.
    ...

The text "`orange-colored'" doesn't appear in the example, nor
anywhere else in the documentation. Should it read "a subdirectory
named `red'."? I tried something this, but it didn't work:

    tar czf test.tgz -C s1 s2/t.txt

but it said: "tar: s2/t.txt: Cannot stat: No such file or
directory". This makes sense, but please tell me: how *do* I specify
the directory in the archive to add it to? Thank you for writing such
a great program.


Sincerely,

matt