lkml.org 
[lkml]   [2001]   [May]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: LANANA: To Pending Device Number Registrants


On Tue, 15 May 2001, James Simmons wrote:

> > only one _device_node_, you can have multiple fd's. In fact, you can, with
> > the Linux VFS layer, fairly easily do things like
> >
> > mknod /dev/fd0 c X Y
> >
> > and then use
> >
> > fd = open("/dev/fd0/colourspace", O_RDWR);
>
> Yipes!! I have to say UNIX has a tendency to teach you ioctl is the only
> way. I have never thought outside of the box nor see anyone else in this
> manner. This is absolutely brillant!!! I can see alot of possibilties with
> this.

The thing being, why thet hell create these device/directory hybrids?
Driver can export a tree and we mount it on fb0. After that you have
the whole set - yes, /dev/fb0/colourspace, etc. - no problem. And no
need to do mknod, BTW. Yes, we'll need to use /dev/fb0/frame for
frame itself. BFD...

You see, as soon as you want slightly more structured stuff (deeper than
one level) you need the dentry tree, yodda, yodda. IOW, you need a
filesystem anyway and it's easy to implement. Want me to do framebufferfs?
Would make a nice demo. No majors. No minors. No ioctls. Less code than
in current tree. ~3 days to implement.

-
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: 2005-03-22 12:53    [W:0.202 / U:45.916 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site