Re: cannot get more than 32 PTYs in 4.4-RELEASE

2002-03-05 Thread Patrick Thomas


Ok, see the point is, I have _already done this_

> sh MAKEDEV pty0   # 0-31
> sh MAKEDEV pty1   # 32-63
> sh MAKEDEV pty2   # 64-95
> sh MAKEDEV pty3   # 96-127
> sh MAKEDEV pty4   # 128-159 xterm won't recognize by default
> sh MAKEDEV pty5   # 160-191 xterm won't recognize by default
> sh MAKEDEV pty6   # 192-223 xterm won't recognize by default
> sh MAKEDEV pty7   # 224-255 xterm won't recognize by default


These are the exact commands I used with `sh MAKEDEV` to create my 256 pty
/dev entries.

So to recap, all 256 /dev files are there, all 256 entries are in
/etc/ttys (and were there by default) and I have:

maxusers128

and

pseudo-device   pty 128

in my kernel.  And when I create 32 screens with `screen`, nobody else can
login by any method (ssh, telnet, etc.).  (No more PTYs error, etc.)

What am I missing here ?  Please note that this is 4.4-RELEASE - this
doesn't seem to be a problem in 4.5

thanks,

PT


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Re: cannot get more than 32 PTYs in 4.4-RELEASE

2002-03-05 Thread Leo Bicknell

In a message written on Tue, Mar 05, 2002 at 07:52:09AM -0600, Paul Halliday wrote:
> 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;;
> 
> interestingly enough the command "./MAKEDEV pty3" will create (as
> indicated) heh.. I was assuming too much, something is screwy here.
> 
> *confused*
> 
> it actually only created 64 terminals. Added the line:
> 
> 4) offset=192 name=t;;
> 
> ~# ./MAKEDEV pty4 && kill -HUP 1
> 
> interesting, now I have 96, but can only use 64. Reboot..

I think if you look at a more recent MAKEDEV, you'll find your answer:

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;;
# This still leaves [tuTU].

So:

sh MAKEDEV pty0   # 0-31
sh MAKEDEV pty1   # 32-63
sh MAKEDEV pty2   # 64-95
sh MAKEDEV pty3   # 96-127
sh MAKEDEV pty4   # 128-159 xterm won't recognize by default
sh MAKEDEV pty5   # 160-191 xterm won't recognize by default
sh MAKEDEV pty6   # 192-223 xterm won't recognize by default
sh MAKEDEV pty7   # 224-255 xterm won't recognize by default

It's fairly trival to patch xterm to look for additional letters.  It
may have made it in the XFree source already.  *shrug*

-- 
   Leo Bicknell - [EMAIL PROTECTED] - CCIE 3440
PGP keys at http://www.ufp.org/~bicknell/
Read TMBG List - [EMAIL PROTECTED], www.tmbg.org

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Re: cannot get more than 32 PTYs in 4.4-RELEASE

2002-03-05 Thread Makoto Matsushita


dp> *confused*

Read http://www.daemonnews.org/199902/answerman.html#ptys>, "I'm
always running out of xterms because I have too many pseduo-ttys
open. How can I increase my number of ptys?" article at DaemonNews.
You may find an example to create more ptys with MAKEDEV.

-- -
Makoto `MAR' Matsushita

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Re: cannot get more than 32 PTYs in 4.4-RELEASE

2002-03-05 Thread Paul Halliday

On Mon, 4 Mar 2002, Patrick Thomas wrote:

>
> In my kernel, I have:
>
>   maxusers128
>
>   pseudo-device   pty 128
>

Not sure if the above steps are actually required. Actually, neither
matter.  I duplicated your steps anyway, and was greeted with the same
messages.

However,

> In my /dev directory, I have used `sh MAKEDEV` to make all 256 /dev/pty
> files.  They are all there, and all have correct major/minor numbers.  I
> know I won't be using all 256 of them, but I just made them all anyway.

I believe the above steps are wrong, looking at /dev/MAKEDEV:

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;;

interestingly enough the command "./MAKEDEV pty3" will create (as
indicated) heh.. I was assuming too much, something is screwy here.

*confused*

it actually only created 64 terminals. Added the line:

4) offset=192 name=t;;

~# ./MAKEDEV pty4 && kill -HUP 1

interesting, now I have 96, but can only use 64. Reboot..



Anyone care to take over?


>
> In /etc/ptys, I didn't change anything, because all 256 pty entries are
> ALREADY in there:
>
> # Pseudo Terminals
> ttyp0 nonenetwork
> ttyp1 nonenetwork
> ...
> ttySu nonenetwork
> ttySv nonenetwork
>
> So those are all there.
>
> I have used `sysctl -a | grep maxuser` to verify that maxusers is indeed
> 128.
>
> BUT - if I log on via ssh and start screen, and start 31 new screen
> windows, then nobody else can log on to the system - I cannot create any
> more screen windows AND nobody else can ssh in - the machine has run out
> of ptys.
>
> I use `fstat` to inquire, and I am maxed out at exactly 32 ptys.
>
> SO THE question is, why am I stuck at 32 ptys ?  I have done it all -
> everything that is in any doc or news post, and everything I was told to
> do here and on -hackers, and yet I am still stuck at 32 !!!
>
> Please tell me the secret lore for getting more than 32 ptys in
> 4.4-RELEASE.
>
>
> thanks,
>
> PT
>
>
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>

Paul H.
___
http://dp.penix.org




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