Actually it's a bit more complex than that.

As I said, I want to send a raw (pulse space encoded) IR signal, in the format used by the lirc conf files, (like using an "irsend SEND_ONCE blah blah...") but without having the configuration file. I want to pass the code as an argument (or a file as an argument) to the program.

I might just rewrite irsend to do what I want, but it's time consuming.