Date: Fri, 22 Dec 2000 16:32:57 +1100 (EST) From: Andy Farkas <andyf@speednet.com.au> To: Jimmy Thomson <glitch@execpc.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: pty's? Message-ID: <Pine.BSF.4.21.0012221628450.27779-100000@backup.af.speednet.com.au> In-Reply-To: <Pine.GSO.4.30.0012212312150.8626-100000@earth.execpc.com>
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On Thu, 21 Dec 2000, Jimmy Thomson wrote:
> On Fri, 22 Dec 2000, Andy Farkas wrote:
> > It looks to me like /dev/MAKEDEV can make a maximum of 256 pty's by saying
> >
> > # cd /dev
> > # /bin/sh MAKEDEV pty7
> >
> > (yes, the '7' seems a bit confusing to me too...)
> >
>
> MAKEDEV pty7???
>
> Anyone have any clue what the heck that does?
As I said, it makes 256 ptys. Sheesh.
/dev/MAKEDEV has this in it:
pty*)
class=`expr $i : 'pty\(.*\)'`
case $class in
0) offset=0 name=p;;
1) offset=32 name=q;;
2) offset=64 name=r;;
3) offset=96 name=s;;
# Note that xterm (at least) only look at p-s.
4) offset=128 name=P;;
5) offset=160 name=Q;;
6) offset=192 name=R;;
7) offset=224 name=S;;
Which means that:
# /bin/sh MAKEDEV pty0 - will make 32 ptys
# /bin/sh MAKEDEV pty1 - will make 64 ptys
# /bin/sh MAKEDEV pty2 - will make 96 ptys
# /bin/sh MAKEDEV pty3 - will make 128 ptys
# /bin/sh MAKEDEV pty4 - will make 160 ptys
# /bin/sh MAKEDEV pty5 - will make 192 ptys
# /bin/sh MAKEDEV pty6 - will make 224 ptys
# /bin/sh MAKEDEV pty7 - will make 256 ptys
Hope this helps.
--
:{ andyf@speednet.com.au
Andy Farkas
System Administrator
Speednet Communications
http://www.speednet.com.au/
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