spawngrid/kerl — pull request #33 by d0rc (2012-11-22 00:52:35+00:00)
Title: fixes related to grep exit code handling

EXIT STATUS
The exit status is 0 if selected lines are found, and 1 if not found. If an error occurred the exit status is 2. (Note: POSIX error handling code should check for '2'
or greater.)