Hi again, a few months later. On Sat, 2011-12-10 at 09:38 +0100, Thomas Schmitt wrote: > Hi, > > > Don't you have any time any longer for working on this? I/we understand > > if you don't, but no reply since October 17 makes one wonder. > > Well, actually i was waiting for a decision what RPC layout to use. > > Meanwhile i explored the opportunities to operate a real CD drive from > a qemu guest. With GNU/Linux it would work quite well > http://libburnia-project.org/wiki/QemuXorriso > > But all workable device configurations deliver an SCSI drive or > a virtio device. I understand the latter has no support in GNU/Hurd at > all, whereas the SCSI device emulates a controller which my copy of > GNU/Hurd does not know. > > When i was up to exploring how to hack in Hurd, i got the unexpected > opportunity to learn from libcdio mailing list how to produce, write > and read CD-TEXT for audio CDs. That's a long standing item on my > todo list. (Another one is UDF. Hurd has the potential to become such > an item, too.) > > I plan to revisit the CD-on-Hurd topic when i'm done with CD-TEXT. > I could still need a tutor then, who leads me through the development > cycle of Hurd, although i have some instructions from this list > somewhere in my mailbox.
Are you finished with the CD-TEXT stuff by now? More hands would be appreciated. I hope the tutors would be the people helping you out previously, mainly Samuel and Olaf. > Hurd has the same strange influence on me as UDF. Whenever i begin > to work on it, there pop up distractions. I stumbled into the test party > of qemu 1.0, and over the ongoing work of Leon Merten Lohse in libcdio. > So probably i would have to begin UDF again in order to induce progress > with my Hurd plans. > (CD-TEXT docs are proprietary but understandable, if one puts together > the few public snippets. UDF docs are public and free, but structured > to chase away the reader. There are two interleaved specs, ECMA-167 and > UDF-2.60.) How much is UDF used nowadays? > Other than with CD-TEXT and UDF, there has never been a user request for > CD burning on Hurd. So it is a total pet project of mine, motivated > only by me being maintainer of a GNU project that is not yet completely > operational on the GNU operating system with GNU kernel. > I still have to learn a lot before i can handle the whole vertical > stack from emulated or passed-through hardware to Hurd userspace. > (It's so dark and lonely down there in the Linux 2.0 driver dungeon.) The network drivers are now using DDE and probably SATA soon (Samuel?). So maybe DDE would be a way forward also for SCSI.
