title: Create absolute paths in tar
body: <p>How do I rewrite file paths to be absolute in tar, other than rewriting the actual tar file? e.g.</p>
  
  <pre><code>$ tree tmp_fs
  tmp_fs
  ├── bin
  ├── boot
  │   └── kernel
  ├── include
  ├── lib
  └── share
      └── misc
          └── logo
  
  6 directories, 2 files
  
  $ tar cC tmp_fs . | tar t
  ./
  ./share/
  ./share/misc/
  ./share/misc/logo
  ./lib/
  ./boot/
  ./boot/kernel
  ./include/
  ./bin
  </code></pre>
  
  <p>Ideally, I'd like to find an option to pass to tar that'd make the paths all be absolute (i.e. <code>/boot/kernel</code> instead of <code>./boot/kernel</code>).</p>