Replace file header scripts:
----------------------------
Author: Gerhard Gappmeier <gerhard.gappmeier [at] ascolab.com> 
License: These files are distributed under the terms of the GPL.
         See LICENSE file for more information.

Description: This scripts can replace file headers from C/C++/JAVA header and
  source files. Often it's necessary to replace the license conditions in
  multiple source files, update the copyright year, or simply make all file
  headers consistent. This can be a lot of work, so that's why I wrote this
  scripts.

How it works: The BASH script replace_header.sh is a simple wrapper that
  executes the AWK script remove_header.awk which implements a basic state
  machine for recognizing C/C++/JAVA comments ("// ...", "/* ... */).
  All comments at the beginning of the file - also when spanning over multiple
  lines - are ignored until the first line without comment is reached. The AWK
  file ignores all this comments, and prints the rest of the file unchanged.
  The BASH script creates a new file with your new header.template and adds your
  code without the old file header to the newly created file. Afterwards it
  copies the new file over the old one.

Install: Just unpack the files into your home directory. It will create a
  directory ~/rh containing all files. Now edit the file ~/rf/header.template
  to fit your needs. That's it.

Usage: ~/rh/replace_header.sh <file>
  This replaces only the header of the given file. That's how it works, but the
  power comes in combination with the find utility. See the following example
  how it works together with find.

Example: Recursively change all header files
$ cd ~/your/source/dir
$ find . -name "*.h" # verify the output to check what is going to be changed.
$ find . -name "*.h" -exec ~/rh/replace_header.sh {} \; # Now replace them all.

See "man find" for more information on how to use find.

ATTENTION: This script changes the files in place, makes no backups, no
  warnings, no prompts. You should commit all changes to your version control
  system before using it, or at least backup your files. (You should really use
  a VCS like SVN, GIT, CVS, etc.)
  USE THIS ON YOUR OWN RISK!
  This scripts are provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.