Porting PDB to OpenBSD Act I Scene II

The need to run Matlab necessitated bringing my PowerBook back from the land of music and sound design... So, with a fresh install of Tiger I now have a box running an OS that implements divert sockets... Getting PDB up and running while my physical layer class works on examples of free space loss (and their arithmetic skills) seems like a great way to make use of the day.

Quick and dirty process to get PDB up and running on OS X:

• Step 0 - clean out bleeding edge cruft

Clean up the build dirs for libcii and libfmt. Build those libs from the Makefiles in their respective directories; the top level make file isn't set up to do it (yet).

• Step 1 - rbconfig.rb is broken by default in Tiger. Fix it.
  

• Step 3 - where, oh where is ruby.h?

I didn't save the output from make, but the gist of it is that with the latest Xcode and the transition to universal binaries our lib path is messed up. Ruby header files are now in universal-darwin8.0 not powerpc-darwin8.0. Just symlink it all:

ln -s /usr/lib/ruby/1.8/universal-darwin8.0/* /usr/lib/ruby/1.8/powerpc-darwin8.0/ 

Now we're ready to get to business with PDB...

The 'pdb' executable is actually a little shell script that has functions for adding/deleting ipfw divert rules and running pdb (nee iledit). I wanted to do a little simple testing with a clear text protocol so I changed the divert rules to accomodate passive FTP:

~/tools/src/pdb-0.0.1.bleeding-edge$sudo ./pdb
==> Adding ipfw divert rules...
00242 divert 4642 tcp from any to any dst-port 21 out
00243 divert 4642 tcp from any 21 to any in
==> Running pdb...
hi pdb-ruby.bundle
hi ip.bundle
(pdb) c
                        45 10 00 38 20 c5 40 00                      E..8..@.
                        40 06 00 00 c0 a8 01 03                      @.......
                        81 80 05 bf c0 60 00 15                      .....`..
                        98 d3 dd f7 82 18 d1 3c                      .......<
                        50 18 ff ff 54 5f 00 00                      P...T_..
                        55 53 45 52 20 61 6e 6f                      USER.ano
                        6e 79 6d 6f 75 73 0d 0a                      nymous..

..SNIP..

(pdb) exit
I am slain!
==> Removing ipfw divert rule...
~/tools/src/pdb-0.0.1.bleeding-edge$

Excellent! More experimenting to come... time to read some code.