lkml.org 
[lkml]   [2006]   [Feb]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: CD writing in future Linux (stirring up a hornets' nest)
    >> >> >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/

    \
     
     \ /
      Last update: 2006-02-09 18:39    [W:0.039 / U:0.952 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site