Re: Manpage - cua, ppp

[Brian Somers <brian@Awfulhak.org>]

> In /usr/share/man/cat4/tty.0 it says...
> 
> 
>      For hardware terminal ports, dial-out is supported through matching de-
>      vice nodes called calling units.  For instance, the terminal called
>      /dev/tty03 would have a matching calling unit called /dev/cua03. These
>      two devices are normally differentiated by creating the calling unit de-
>      vice node with a minor number 128 greater than the dial-in device node.  
> 
> The "normally" worries me a little,  so I tried out
>  knife$ uname -a
>  OpenBSD knife.xserv.com.au 2.5 GENERIC#0 mac68k
> 
>  knife$ ls -l /dev/tty0*
>  crw-r-----  2 uucp  wheel   12,   0 Jun  4 11:57 /dev/tty00
>  crw-r-----  1 uucp  wheel   12,   1 Jun  4 15:13 /dev/tty01    
> 
>  knife$ ls -l /dev/cua*
>  crw-r--r--  1 root  wheel   12, 128 Feb 18 14:33 /dev/cua00
>  crw-r--r--  1 root  wheel   12, 129 Feb 18 14:26 /dev/cua01
> 
>  knife$ echo at > /dev/tty00   # can also use cu,  whatever,  works fine
> 
>  knife$ echo at > /dev/cua00
>  sh: cannot create /dev/cua00: Device not configured
> 
> Which suggests that the "normally" doesn't apply to  mac68k at least. 
> Anyway,  the reason why I was playing around was to set up a PPP link.
> It seems that /usr/sbin/ppp really wants a cua-like device,  based on
> 
>  knife$ /usr/sbin/ppp
>  Working in interactive mode
>  Using interface: tun0
>  ppp ON knife> set device /dev/tty00
>  ppp ON knife> set speed 38400
>  ppp ON knife> term
>  Warning: deflink: Open: Cannot get modem status: Inappropriate ioctl for device
> 
> 
> A quick browse through the ppp source code didn't tell me anything that helped.
> Am I doing something wrong here,  or is there something else going on here?
> And under what conditions does the cua devices have which minor numbers?

The error is because an ioctl(, TIOCMGET, ) failed.  This should 
never happen on a real tty (although it does happen for pseudo ttys - 
this has been fixed in -current).

I don't know why it's failing for you, but then, I've never had the 
opportunity to run ppp on a mac.... sorry.

> Regards,
>    Greg Baker
> 
> Aptec IT Solutions      Phone:  02 8977 0000
> Suite 11-12, 1st floor  Fax:    02 9451 8217
> Belrose Centre          Mobile: 0413 940 071
> 25 Ralston Ave          Email:  Greg_Baker@aptec.net.au
> Belrose NSW 2085        WWW:    http://www.aptec.net.au/

-- 
Brian <brian@Awfulhak.org>                        <brian@FreeBSD.org>
      <http://www.Awfulhak.org>                   <brian@OpenBSD.org>
Don't _EVER_ lose your sense of humour !          <brian@uk.FreeBSD.org>