Modify the NetBSD ls(1) command to accept the "-O" flag as specified below:

-O	If combined with long (-l) output, print the optimal file I/O
        blocksize right after printing the file size.


Your homework submission will consist of a tar archive containing the
following two files:

<username>/Makefile
<username>/patch

When extracting the archive, you can do the following:

cd <username>
make

As a result, there will be a new binary 'ls' (<username>/ls/ls) that will
support the given option.

In other words, running 'make' will fetch the sources to NetBSD's ls(1)
command via anonymous CVS access, apply the patch in the given directory and
then build the binary.

Your homework will be graded based on this functionality, not only the code
changes you make.

This homework assignment is due on 2008-11-18 18:14:59.