All, Woudl this tool be useful/interesting to the coreutils group? It's not in C, but has some unique/novel features. When I saw the program uniq, I did a man and saw this list. I thought it might be worth a look for the group. If you are interested, I wrote it in python over the last couple of months and licensed it under GPL3. There is a video that should show you what it does in about 2 minutes.
http://opensource.eyemg.com/Petit Thanks Scott M -- Scott McCarty EYEMG.com LLC - Interactive Media Group 190 North Union St. Akron, Oh 44304 Office: 330-434-7873 ext 214