Valery just posted a blog article about a tool to insert headers in a bunch of files. I don't have too much to say about that, but the comment form on the blog didn't want me to post the following (a server error message about a potentially dangerous form post, lol), so I thought I'd just put it in my own blog instead. Here's the comment I wanted to post:

Wow! That's some solution for a tiny problem... How about a small shell script:

#!/bin/sh

for file in *.cpp; do
  cat my_new_header > $file.new
  cat $file >> $file.new
  mv -f $file.new $file
done

Certainly not the most elegant solution, but just as certainly it does the job and takes only a few seconds to write when needed.