Tony Hansen writes:
Whether parsing mboxcl2 takes "much" more code than parsing mboxrd is a
subjective measurement.
Here's complete awk code to count the number of messages in an mbox,
assuming mboxrd (or mboxo) format:
awk '/^From / { ++sum } END { print sum }'
Please show us your code to do the same thing with mboxcl2.
Remember that, if you don't check Content-Length, you'll sometimes break
messages at the wrong place. Also remember that Content-Length can be
capitalized and spaced strangely, maybe even across lines.
---D. J. Bernstein, Associate Professor, Department of Mathematics,
Statistics, and Computer Science, University of Illinois at Chicago