I am certainly open to replacing the "format" flag (-f) with an alternative field separator flag. It has a nice Unixy feel to it and requires less code.
Personally, I think using -d (or --delimiter) might be the only change I'd want to make to the patch KatolaZ provided. Partly because pidof already has a lower-case "-s" flag and I want to avoid confusion, and because tools like cut also use "-d". If there are no objections, I'll upstream KatolaZ's patch and remove the "-f" flag. Jesse
