Messages in this thread | | | Date | Thu, 9 Feb 2006 18:36:46 +0100 (MET) | From | Jan Engelhardt <> | Subject | Re: CD writing in future Linux (stirring up a hornets' nest) |
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>> >> >Please explain me: >> >> > >> >> >- how to use /dev/hd* in order to scan an image from a scanner >> >> >- how to use /dev/hd* in order to talk to a CPU device >> >> >- how to use /dev/hd* in order to talk to a tape device >> >> >- how to use /dev/hd* in order to talk to a printer >> >> >- how to use /dev/hd* in order to talk to a jukebox >> >> >- how to use /dev/hd* in order to talk to a graphical device >> >> > >> >> With /dev/sg, this was possible? >> > >> >Of course! >> > >> But you need to open the correct /dev/sg[0-9] too, don't you? >> (otherwise cdrecord would set the jukebox on fire) > >This is why the mapping engine is in the Linux adoption part of >libscg. It maps the non-stable device <-> /dev/sg* relation to a >stable b,t,l address. > Right. The question was rather like this: Say we have our non-stable /dev/sr0 mapping to /dev/sg0, and it has got BTL 1,1,0. Now, if the user starts `cdrecord -dev=1,1,0`, `ls -l /proc/$(pidof -s cdrecord)/fd/` should show (and in fact did when I used ide-scsi back then) /dev/sg0, right?
If so, what's wrong with just opening /dev/sg0 directly (as per user request, i.e. cdrecord -dev=/dev/sg0) and sending the scsi commands down the fd?
Jan Engelhardt -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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