Graudit – Code Audit Tool Using Grep

Graudit is a simple script and signature sets that allows you to find potential security flaws in source code using the GNU utility grep. It’s comparable to other static analysis applications like RATS, SWAAT and flaw-finder while keeping the technical requirements to a minimum and being very flexible

http://www.darknet.org.uk/2009/09/graudit-code-audit-tool-using-grep/