Re: Modules and DevFS

From: Michael B. Trausch (
Date: Fri Feb 02 2001 - 15:00:00 EST

On Fri, 2 Feb 2001, Helge Hafting wrote:

> "Michael B. Trausch" wrote:
> [...]
> > DevFSd provides symlinks as follows:
> >
> > /dev/ttyS0 = /dev/tts/0
> > /dev/tty0 = /dev/vc/0
> > /dev/pty* = /dev/pty/*
> >
> > Until programs use the new names (e.g., init should tell getty to use
> > /dev/vc/0 instead of /dev/tty0), and everything on the system doesn't need
> > support for the old-style names, you need to use devfsd and
> > such.
> You don't have to wait for every program to use the new names, if
> devfs is the way you want to go. Do a "rgrep /dev /etc/*" and you'll
> find that many device-using programs have their device names stored in
> configuration files. Fixing these files is simple, just replace
> /dev/device with whatever the symlink points to. [This leaves a few
> files like /etc/securetty that use relative pathnames. These are of
> course fixable too, they just don't have the /dev to search for.]

Yeah, also mpg123 has /dev/dsp hardcoded. Which reminds me of a problem
that I'm having with DevFS - I have a minor fix for it, but I don't think
that's "correct" due to the way it works. Myabe DevFS was supposed to
have this behavior change: The console owner can't play sound. =(

/dev/sound/dsp and /dev/sound/mixer are owned by root:root, and start with
0600 permissions. I want them to be owned by the console owner, and
retain that 0600 permission. I can't think of a way to do that exactly,
so what I'm doing for now, is make them 0666 so that I can use them in my
programs. (I run from a 33.6 modem, for now, so I'm not worried about
people snooping into my audio, becuase that's a *lot* of data for them to
try to snoop).

Is this fixable the "right" way?

> This lets you get rid of a lot of symlinks. I still need symlinks for
> /dev/tty* (hardcoded in X), isdn stuff and sound stuff. Everything
> else is gone from dev, sitting comfortably in subdirectories only.
> Getting rid of all "possible" disks helped in particular, "ls /dev"
> fits in a standard 80x25 screen now. :-)

That's the one thing that I really like, I can look at /dev/ide/hd/* and
see what I *have*, not what I *could* have. That saves me the trouble of
having to do an fdisk -l every time I want to see what partitions I have
on my drives.

I just need to get ide-scsi working and I'll be all set, I still don't
have ide-scsi working in 2.4.x but I haven't tried it yet. When I do, I'm
hoping that I can get it working completely so that I can use my burner.

        - Mike

Michael B. Trausch
Avid Linux User since April, '96! AIM: ML100Smkr

              Contactable via IRC (DALNet) or AIM as ML100Smkr

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