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Re: Need help on Linux



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On Mon, 17 Nov 1997, Carsten Hoeger wrote:

> On Mon, 17 Nov 1997 Matthias.Apitz@SOFTCON.de wrote:
> 
> > Carsten Hoeger wrote:
> >     
> >     On Sat, 15 Nov 1997, Julio C Spinelli wrote:
> >     
> >     [...]
> >     
> >     > Then either start the faxgetty cuax (x=0,1,2,3 etc.) by hand or add 
> >     > it to your init file.
> >     
> >     By the way: Don't use one of the /dev/cuax devices. Use /dev/ttySx
> >     instead...
> > 
> > Could you please explain in detail the difference between
> > the two devices (as far I can see they have at least different
> > major number and perhaps different kernel drivers):
> > 
> > $ ls -l /dev/ttyS1 /dev/cua1
> > crw-rw-rw-   1 root     uucp       5,  65 Jul 18  1994 /dev/cua1
> > crw-rw-rw-   1 root     tty        4,  65 Jul 18  1994 /dev/ttyS1
> > 
> > Why /dev/cuax exists _and_ should not be used?
> 
> 
> I don't know exactly why, but you can for example read in the PPP-HOWTO:

It's a legacy of when some OS'es, such as SunOS, used one device for
incoming calls and another for outgoing calls. This unfortunately made
using the same lock files rather awkward, and could confuse the hell
out of systems like HylaFAX that have a single process (faxgetty)
monitoring the line and spinning off getty's, fax process, etc. as
necessary.

According to Ted T'so at MIT, who maintains the Linux archives, it's
being written out of future releases: it's much too difficult and
confusing to maintain.

			Nico Garcia
			Engineer, CIRL 
			Mass. Eye and Ear Infirmary
			raoul@cirl.meei.harvard.edu

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