I was looking at writing something to interact with gpsd. There is a shared memory interface, and a Unix socket interface. The protocol spoken by gpsd is JSON, so I figured that I would just open up a socket and start talking ... however ... really early on in the man page, it says "it is a bad idea for clients to speak the protocol directly" ( https://gpsd.gitlab.io/gpsd/gpsd_json.html) presumably since the protocol was likely to change? They didn't elaborate ...
There is a C interface described at (https://gpsd.gitlab.io/gpsd/libgps.html), which has the familiar "open-and-get-opaque-thing" and "close-opaque-thing-when-done" design. I'd rather not compile anything in C, and just use the tools in Guile to interact with libgps. Is there a way to get Guile's garbage collector to call "gps_close" on the opaque structure returned by "gps_open"? Or is this something that would be more handily implemented in a C extension? Right now, because I'm just not concerned about sloppiness, I've just been speaking the wire protocol, but I do feel bad about being sloppy and wanted to clean it up for others to use perhaps.
