Now it actually logs all its requests and responses, the fingerprints
of keys mentioned in all messages, and so on.
I've also added the -v option, which causes Pageant in any mode to
direct that logging information to standard error. In --debug mode,
however, the logging output goes to standard output instead (because
when debugging, that information changes from a side effect to the
thing you actually wanted in the first place :-).
An internal tweak: the logging functions now take a va_list rather
than an actual variadic argument list, so that I can pass it through
several functions.
The exact nature of the Socket is left up to the front end to decide,
so that we can use a Unix-domain socket on Unix and a Windows named
pipe on Windows. But the logic of how we receive data and what we send
in response is all cross-platform.
I'm aiming for windows/winpgnt.c to only contain the parts of Windows
Pageant that are actually to do with handling the Windows API, and for
all the actual agent logic to be cross-platform.
This commit is a start: I've moved every function and internal
variable that was easy to move. But it doesn't get all the way there -
there's still a lot of logic in add_keyfile() and get_keylist*() that
would be good to move out to cross-platform code, but it's harder
because that code is currently quite intertwined with details of
Windows OS interfacing such as printing message boxes and passphrase
prompts and calling back out to agent_query if the Pageant doing that
job isn't the primary one.
