Mailing List Archive: clogin adding 'exit' command?

clogin adding 'exit' command?

May 3, 2018, 9:05 AM

Post #1 of 16 (1997 views)

I'm updating an old F5 loadbalancer script to work with BIG-IP 13.1 -
it seems that since the last time I needed to use it, F5 have changed
to starting users in tmsh instead of bash, so the command list needed
to be tweaked. That's all fine but...

What I end up with is the following clogin command-line:

clogin -t 90 -c "modify cli preference pager disabled
display-threshold 0;show /sys version;show /sys hardware;show /sys
license;show /net route static;list all-properties recursive" lb01

which does everything I need, but then sits at the final prompt
repeatedly type 'exit':

rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)#exit
Use "quit" to end the current session
rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)# exit
Use "quit" to end the current session

Where is this 'exit' coming from? Can it be altered?

If I add 'quit' to the end of my command list, then instead it
complains EOF received and none of the commands are matched:

rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)# quit
Connection to lb01 closed.

Error: EOF received

Do I need to dig into the expect code to deal with this?

Thanks for any pointers (or to a modern f5rancid)...

Howie

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Re: clogin adding 'exit' command? [ In reply to ]

heas at shrubbery

May 3, 2018, 9:38 AM

Post #2 of 16 (1997 views)

Permalink

Thu, May 03, 2018 at 05:05:27PM +0100, Howard Jones:
> I'm updating an old F5 loadbalancer script to work with BIG-IP 13.1 -
> it seems that since the last time I needed to use it, F5 have changed
> to starting users in tmsh instead of bash, so the command list needed
> to be tweaked. That's all fine but...

if you run rancid 3.6 (or better 3.7) there are two device types for f5;
f5 and bigip (for >=11.0).

> What I end up with is the following clogin command-line:
>
> clogin -t 90 -c "modify cli preference pager disabled
> display-threshold 0;show /sys version;show /sys hardware;show /sys
> license;show /net route static;list all-properties recursive" lb01
>
> which does everything I need, but then sits at the final prompt
> repeatedly type 'exit':
>
> rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)#exit
> Use "quit" to end the current session
> rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)# exit
> Use "quit" to end the current session
>
> Where is this 'exit' coming from? Can it be altered?
>
> If I add 'quit' to the end of my command list, then instead it
> complains EOF received and none of the commands are matched:
>
> rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)# quit
> Connection to lb01 closed.
>
> Error: EOF received
>
> Do I need to dig into the expect code to deal with this?

the expect it using exit to logout. Does this work

Index: bin/clogin.in
===================================================================
--- bin/clogin.in (revision 3786)
+++ bin/clogin.in (working copy)
@@ -440,6 +440,11 @@
send -h "exit\r"
exp_continue;
}
+ -re "^\[^\n\r *]*Use .quit. to end" {
+ # the F5 >=11 uses quit
+ send -h "quit\r"
+ exp_continue;
+ }
"The system has unsaved changes" { # Force10 SFTOS
if {$do_saveconfig} {
catch {send "y\r"}

> Thanks for any pointers (or to a modern f5rancid)...
>
> Howie
>
> _______________________________________________
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> Rancid-discuss@shrubbery.net
> http://www.shrubbery.net/mailman/listinfo/rancid-discuss

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Re: clogin adding 'exit' command? [ In reply to ]

howie at thingy

May 3, 2018, 10:39 AM

Post #3 of 16 (1996 views)

Permalink

Aha, thanks! That's much neater than my bodge (make an f5login and
remove the conditional for send quit/exit).

For anyone else, heasley's clogin patch above, plus this new type got me going:

bigip13;script;rancid -t bigip13
bigip13;login;clogin
bigip13;module;bigip
bigip13;inloop;bigip::inloop
bigip13;command;rancid::RunCommand;modify cli preference pager
disabled display-threshold 0
bigip13;command;bigip::ShowVersion;show sys version
bigip13;command;bigip::ShowHardware;show sys hardware
bigip13;command;bigip::ShowLicense;show sys license
bigip13;command;bigip::ShowRouteStatic;show /net route static
bigip13;command;bigip::WriteTerm;list all-properties recursive

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Re: clogin adding 'exit' command? [ In reply to ]

heas at shrubbery

May 4, 2018, 11:50 AM

Post #4 of 16 (1995 views)

Permalink

Thu, May 03, 2018 at 06:39:55PM +0100, Howard Jones:
> Aha, thanks! That's much neater than my bodge (make an f5login and
> remove the conditional for send quit/exit).
>
> For anyone else, heasley's clogin patch above, plus this new type got me going:

great. i'll commit it if i dont find any issues with it locally.

> bigip13;script;rancid -t bigip13
> bigip13;login;clogin
> bigip13;module;bigip
> bigip13;inloop;bigip::inloop
> bigip13;command;rancid::RunCommand;modify cli preference pager
> disabled display-threshold 0
> bigip13;command;bigip::ShowVersion;show sys version
> bigip13;command;bigip::ShowHardware;show sys hardware
> bigip13;command;bigip::ShowLicense;show sys license
> bigip13;command;bigip::ShowRouteStatic;show /net route static
> bigip13;command;bigip::WriteTerm;list all-properties recursive

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Re: clogin adding 'exit' command? [ In reply to ]

howie at thingy

May 4, 2018, 11:52 AM

Post #5 of 16 (1995 views)

Permalink

On 3 May 2018 at 18:39, Howard Jones <howie@thingy.com> wrote:
> Aha, thanks! That's much neater than my bodge (make an f5login and
> remove the conditional for send quit/exit).
>
> For anyone else, heasley's clogin patch above, plus this new type got me going:
>
> bigip13;script;rancid -t bigip13
> bigip13;login;clogin
> bigip13;module;bigip
> bigip13;inloop;bigip::inloop
> bigip13;command;rancid::RunCommand;modify cli preference pager disabled display-threshold 0
> bigip13;command;bigip::ShowVersion;show sys version
> bigip13;command;bigip::ShowHardware;show sys hardware
> bigip13;command;bigip::ShowLicense;show sys license
> bigip13;command;bigip::ShowRouteStatic;show /net route static
> bigip13;command;bigip::WriteTerm;list all-properties recursive

I've just noticed that although if I run `rancid-run -r lb01` I get a
successful collection, I don't get one during a normal hourly run
(rancid-run with no params)

lb01: missed cmd(s): all commands
lb01: End of run not found

(and also its buddy lb02) Both cases running as the same `rancid`
user, which owns the files, so it doesn't appear to be permissions
related. Every other device is running smoothly.

Is there some way to either keep the .new file or increase logging
from rancid-run (like rancid -d)?

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Re: clogin adding 'exit' command? [ In reply to ]

heas at shrubbery

May 4, 2018, 3:01 PM

Post #6 of 16 (1995 views)

Permalink

Fri, May 04, 2018 at 07:52:28PM +0100, Howard Jones:
> On 3 May 2018 at 18:39, Howard Jones <howie@thingy.com> wrote:
> > Aha, thanks! That's much neater than my bodge (make an f5login and
> > remove the conditional for send quit/exit).
> >
> > For anyone else, heasley's clogin patch above, plus this new type got me going:
> >
> > bigip13;script;rancid -t bigip13
> > bigip13;login;clogin
> > bigip13;module;bigip
> > bigip13;inloop;bigip::inloop
> > bigip13;command;rancid::RunCommand;modify cli preference pager disabled display-threshold 0
> > bigip13;command;bigip::ShowVersion;show sys version
> > bigip13;command;bigip::ShowHardware;show sys hardware
> > bigip13;command;bigip::ShowLicense;show sys license
> > bigip13;command;bigip::ShowRouteStatic;show /net route static
> > bigip13;command;bigip::WriteTerm;list all-properties recursive
>
> I've just noticed that although if I run `rancid-run -r lb01` I get a
> successful collection, I don't get one during a normal hourly run
> (rancid-run with no params)
>
> lb01: missed cmd(s): all commands
> lb01: End of run not found
>
> (and also its buddy lb02) Both cases running as the same `rancid`
> user, which owns the files, so it doesn't appear to be permissions
> related. Every other device is running smoothly.
>
> Is there some way to either keep the .new file or increase logging
> from rancid-run (like rancid -d)?

no; I've needed this in the past, but I wanted to keep the .raw.

perhaps first try just a cronjob.
. etc/rancid.conf; export NOPIPE=YES; rancid -d -t bigip13 host

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Re: clogin adding 'exit' command? [ In reply to ]

howie at thingy

Aug 23, 2018, 4:32 AM

Post #7 of 16 (1923 views)

Permalink

Reaping a thread, but I think I finally got this fixed now. The
bigip.pm overrides TERM with "vt100", always. The prompt is so long
(70 chars on my test box!) that the command scrolls within its line
(although without ^H), so the cmds_regexp never matches. Changing the
TERM line to "screen-w" in bigip.pm resolves it.

On 8 May 2018 at 16:20, heasley <heas@shrubbery.net> wrote:
> Tue, May 08, 2018 at 02:39:06PM +0100, Howard Jones:
>> Definitely something funky going on. The .raw file left behind from
>> cron is different from the one if I run the same in a subshell.
>>
>> The front 9 or so characters of commands are chopped off, which would
>> explain why I get "missed all commands".
>> Also, it's trying to send Cisco terminal commands, although those are
>> just ignored, so probably not the immediate issue.
>>
>> I checked with hexdump, and there don't seem to be lots of ^H or
>> anything like that redrawing the prompt. Although, for those terminal
>> commands, there's:
>>
>> terminal ^Hwidth 132^M
>>
>> but not in the non-cron version. Nothing else like that further on.
>>
>> In the output below, ssh-no-pubkey is a one-liner shellscript to avoid
>> Cisco Nexus complaining about too many authentication fails, when
>> pubkeys are loaded:
>>
>> ssh -o PubkeyAuthentication=no $*
>
> exec ssh -o PubkeyAuthentication=no $*
>>
>> I just checked and from a normal command line, the F5 doesn't scroll
>> the command horizontally or anything strange.
>>
>> Any ideas where I can look next? If it was telnet, I'd capture the
>> traffic, but it doesn't look like wireshark will do much with the
>> encrypted part of SSH captures.
>>
>> Howard
>
> probably the most likely cause is that its assuming the client will
> have a terminal (TERM) type and it makes further assumptions when it
> doesnt. But, it looks like bigip IS setting the term to vt100. Can
> you trying setting your interactive TERM to vt100 to see if that
> reproduces it?
>
> Else, it might need other tty intrinsics; so, perhaps try hlogin with
> it, but it will need that 'quit' patch.
>
> is f5 supporting NETCONF?
>
>> executing clogin -t 90 -c"modify cli preference pager disabled
>> display-threshold 0;show sys version;show sys hardware;show sys
>> license;show /net route static;list all-properties recursive" lb01
>>
>> lb01
>> spawn /opt/rancid/local/ssh-no-pubkey -c aes192-ctr -x -l rancidconfbackup lb01
>> Password:
>> Last login: Tue May 8 12:40:30 2018 from 192.168.0.27^M
>> rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)#
>> rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)#
>> terminal length 0
>> Syntax Error: unexpected argument "terminal"
>> rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)#
>> terminal width 132
>> Syntax Error: unexpected argument "terminal"
>> rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)# i
>> preference pager disabled display-threshold 0
>> rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)#version

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Re: clogin adding 'exit' command? [ In reply to ]

heas at shrubbery

Aug 25, 2018, 3:42 PM

Post #8 of 16 (1921 views)

Permalink

Thu, Aug 23, 2018 at 12:32:38PM +0100, Howard Jones:
> Reaping a thread, but I think I finally got this fixed now. The
> bigip.pm overrides TERM with "vt100", always. The prompt is so long
> (70 chars on my test box!) that the command scrolls within its line
> (although without ^H), so the cmds_regexp never matches. Changing the
> TERM line to "screen-w" in bigip.pm resolves it.
>

what version are you running? the TERM was changed to vt100-w in rancid
3.3.

>
>
> On 8 May 2018 at 16:20, heasley <heas@shrubbery.net> wrote:
> > Tue, May 08, 2018 at 02:39:06PM +0100, Howard Jones:
> >> Definitely something funky going on. The .raw file left behind from
> >> cron is different from the one if I run the same in a subshell.
> >>
> >> The front 9 or so characters of commands are chopped off, which would
> >> explain why I get "missed all commands".
> >> Also, it's trying to send Cisco terminal commands, although those are
> >> just ignored, so probably not the immediate issue.
> >>
> >> I checked with hexdump, and there don't seem to be lots of ^H or
> >> anything like that redrawing the prompt. Although, for those terminal
> >> commands, there's:
> >>
> >> terminal ^Hwidth 132^M
> >>
> >> but not in the non-cron version. Nothing else like that further on.
> >>
> >> In the output below, ssh-no-pubkey is a one-liner shellscript to avoid
> >> Cisco Nexus complaining about too many authentication fails, when
> >> pubkeys are loaded:
> >>
> >> ssh -o PubkeyAuthentication=no $*
> >
> > exec ssh -o PubkeyAuthentication=no $*
> >>
> >> I just checked and from a normal command line, the F5 doesn't scroll
> >> the command horizontally or anything strange.
> >>
> >> Any ideas where I can look next? If it was telnet, I'd capture the
> >> traffic, but it doesn't look like wireshark will do much with the
> >> encrypted part of SSH captures.
> >>
> >> Howard
> >
> > probably the most likely cause is that its assuming the client will
> > have a terminal (TERM) type and it makes further assumptions when it
> > doesnt. But, it looks like bigip IS setting the term to vt100. Can
> > you trying setting your interactive TERM to vt100 to see if that
> > reproduces it?
> >
> > Else, it might need other tty intrinsics; so, perhaps try hlogin with
> > it, but it will need that 'quit' patch.
> >
> > is f5 supporting NETCONF?
> >
> >> executing clogin -t 90 -c"modify cli preference pager disabled
> >> display-threshold 0;show sys version;show sys hardware;show sys
> >> license;show /net route static;list all-properties recursive" lb01
> >>
> >> lb01
> >> spawn /opt/rancid/local/ssh-no-pubkey -c aes192-ctr -x -l rancidconfbackup lb01
> >> Password:
> >> Last login: Tue May 8 12:40:30 2018 from 192.168.0.27^M
> >> rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)#
> >> rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)#
> >> terminal length 0
> >> Syntax Error: unexpected argument "terminal"
> >> rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)#
> >> terminal width 132
> >> Syntax Error: unexpected argument "terminal"
> >> rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)# i
> >> preference pager disabled display-threshold 0
> >> rancidconfbackup@(lb01)(cfg-sync In Sync)(Active)(/Common)(tmos)#version

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Re: clogin adding 'exit' command? [ In reply to ]

howie at thingy

Aug 26, 2018, 1:36 AM

Post #9 of 16 (1921 views)

Permalink

On Sat, 25 Aug 2018 at 23:43, heasley <heas@shrubbery.net> wrote:

> Thu, Aug 23, 2018 at 12:32:38PM +0100, Howard Jones:
> > Reaping a thread, but I think I finally got this fixed now. The
> > bigip.pm overrides TERM with "vt100", always. The prompt is so long
> > (70 chars on my test box!) that the command scrolls within its line
> > (although without ^H), so the cmds_regexp never matches. Changing the
> > TERM line to "screen-w" in bigip.pm resolves it.
> >
>
> what version are you running? the TERM was changed to vt100-w in rancid
> 3.3.

Huh, that’s odd. I’m running 3.6.

Re: clogin adding 'exit' command? [ In reply to ]

heas at shrubbery

Aug 26, 2018, 12:47 PM

Post #10 of 16 (1921 views)

Permalink

Sun, Aug 26, 2018 at 09:36:54AM +0100, Howard Jones:
> On Sat, 25 Aug 2018 at 23:43, heasley <heas@shrubbery.net> wrote:
>
> > Thu, Aug 23, 2018 at 12:32:38PM +0100, Howard Jones:
> > > Reaping a thread, but I think I finally got this fixed now. The
> > > bigip.pm overrides TERM with "vt100", always. The prompt is so long
> > > (70 chars on my test box!) that the command scrolls within its line
> > > (although without ^H), so the cmds_regexp never matches. Changing the
> > > TERM line to "screen-w" in bigip.pm resolves it.
> > >
> >
> > what version are you running? the TERM was changed to vt100-w in rancid
> > 3.3.
>
>
> Huh, that’s odd. I’m running 3.6.

Not sure what to tell you; might be a bug between the keyboard and chair.
Can you try a fresh 3.8?

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Re: clogin adding 'exit' command? [ In reply to ]

howie at thingy

Aug 28, 2018, 3:21 AM

Post #11 of 16 (1918 views)

Permalink

On 26 August 2018 at 20:47, heasley <heas@shrubbery.net> wrote:
> Sun, Aug 26, 2018 at 09:36:54AM +0100, Howard Jones:
>> On Sat, 25 Aug 2018 at 23:43, heasley <heas@shrubbery.net> wrote:
>>
>> > what version are you running? the TERM was changed to vt100-w in rancid
>> > 3.3.
>>
>>
>> Huh, that’s odd. I’m running 3.6.
>
> Not sure what to tell you; might be a bug between the keyboard and chair.
> Can you try a fresh 3.8?

But which keyboard and chair? ;-)

I just downloaded a fresh 3.8 and this is what bigip.pm says:

# load-time initialization
sub import {
# force a terminal type so as not to confuse the POS
$ENV{'TERM'} = "vt100";

0;
}

f5rancid has vt100-w, but as far as I can see, neither the bigip or
bigip13 device type actually uses that anymore. (script is set to
"rancid -t bigip"). It looks like it's used the module since 3.5 - I
guess that change didn't make the transition?

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Re: clogin adding 'exit' command? [ In reply to ]

heas at shrubbery

Aug 28, 2018, 6:48 AM

Post #12 of 16 (1918 views)

Permalink

Tue, Aug 28, 2018 at 11:21:04AM +0100, Howard Jones:
> On 26 August 2018 at 20:47, heasley <heas@shrubbery.net> wrote:
> > Sun, Aug 26, 2018 at 09:36:54AM +0100, Howard Jones:
> >> On Sat, 25 Aug 2018 at 23:43, heasley <heas@shrubbery.net> wrote:
> >>
> >> > what version are you running? the TERM was changed to vt100-w in rancid
> >> > 3.3.
> >>
> >>
> >> Huh, that’s odd. I’m running 3.6.
> >
> > Not sure what to tell you; might be a bug between the keyboard and chair.
> > Can you try a fresh 3.8?
>
> But which keyboard and chair? ;-)

right!

> I just downloaded a fresh 3.8 and this is what bigip.pm says:
>
> # load-time initialization
> sub import {
> # force a terminal type so as not to confuse the POS
> $ENV{'TERM'} = "vt100";
>
> 0;
> }
>
> f5rancid has vt100-w, but as far as I can see, neither the bigip or
> bigip13 device type actually uses that anymore. (script is set to
> "rancid -t bigip"). It looks like it's used the module since 3.5 - I
> guess that change didn't make the transition?

ah, its been changed in the big-ip <= v10.x script, not the >=11.x script.
Would you test changing this to vt100-w?

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Re: clogin adding 'exit' command? [ In reply to ]

howie at thingy

Aug 28, 2018, 8:58 AM

Post #13 of 16 (1918 views)

Permalink

On 28 August 2018 at 14:48, heasley <heas@shrubbery.net> wrote:
>
> ah, its been changed in the big-ip <= v10.x script, not the >=11.x script.
> Would you test changing this to vt100-w?

No, vt100-w doesn't work with bigip13:

Warning, can't fully initialize terminal, TERM is set to
"vt100-w", status (0)
No entry for terminal type "vt100-w";

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Re: clogin adding 'exit' command? [ In reply to ]

heas at shrubbery

Aug 28, 2018, 10:37 AM

Post #14 of 16 (1918 views)

Permalink

Tue, Aug 28, 2018 at 04:58:54PM +0100, Howard Jones:
> On 28 August 2018 at 14:48, heasley <heas@shrubbery.net> wrote:
> >
> > ah, its been changed in the big-ip <= v10.x script, not the >=11.x script.
> > Would you test changing this to vt100-w?
>
> No, vt100-w doesn't work with bigip13:
>
> Warning, can't fully initialize terminal, TERM is set to
> "vt100-w", status (0)
> No entry for terminal type "vt100-w";

grumble. One last bit; could you test clogin from ranicd 3.8 without altering
TERM?

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Re: clogin adding 'exit' command? [ In reply to ]

howie at thingy

Aug 28, 2018, 1:43 PM

Post #15 of 16 (1918 views)

Permalink

My 3.6 installation has a bunch of local tweaks (to control_rancid),
so I can't upgrade without a bit of planning.
However, I just installed 3.8 alongside 3.6 (different user, different
dir) and with no changes, I get:

lb02.dc1: missed cmd(s): modify cli preference pager disabled
display-threshold 0

but the quit detection part seems to work OK.

However, changing the TERM to screen-w in bigip.pm *doesn't* resolve
that missed cmd.
So the plot thickens.

I'll investigate a bit more tomorrow.

On 28 August 2018 at 18:37, heasley <heas@shrubbery.net> wrote:
> Tue, Aug 28, 2018 at 04:58:54PM +0100, Howard Jones:
>> On 28 August 2018 at 14:48, heasley <heas@shrubbery.net> wrote:
>> >
>> > ah, its been changed in the big-ip <= v10.x script, not the >=11.x script.
>> > Would you test changing this to vt100-w?
>>
>> No, vt100-w doesn't work with bigip13:
>>
>> Warning, can't fully initialize terminal, TERM is set to
>> "vt100-w", status (0)
>> No entry for terminal type "vt100-w";
>
> grumble. One last bit; could you test clogin from ranicd 3.8 without altering
> TERM?

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Re: clogin adding 'exit' command? [ In reply to ]

heas at shrubbery

Aug 28, 2018, 3:21 PM

Post #16 of 16 (1918 views)

Permalink

Tue, Aug 28, 2018 at 09:43:08PM +0100, Howard Jones:
> My 3.6 installation has a bunch of local tweaks (to control_rancid),
> so I can't upgrade without a bit of planning.
> However, I just installed 3.8 alongside 3.6 (different user, different
> dir) and with no changes, I get:
>
> lb02.dc1: missed cmd(s): modify cli preference pager disabled
> display-threshold 0
>
> but the quit detection part seems to work OK.
>
> However, changing the TERM to screen-w in bigip.pm *doesn't* resolve
> that missed cmd.

clogin in 3.8 has code to set tty parameters; width. i was hoping that
would fix the problem. if you're sure you're using the 3.8 clogin, then
apparently it doesnt fix it.

> So the plot thickens.
>
> I'll investigate a bit more tomorrow.
>
> On 28 August 2018 at 18:37, heasley <heas@shrubbery.net> wrote:
> > Tue, Aug 28, 2018 at 04:58:54PM +0100, Howard Jones:
> >> On 28 August 2018 at 14:48, heasley <heas@shrubbery.net> wrote:
> >> >
> >> > ah, its been changed in the big-ip <= v10.x script, not the >=11.x script.
> >> > Would you test changing this to vt100-w?
> >>
> >> No, vt100-w doesn't work with bigip13:
> >>
> >> Warning, can't fully initialize terminal, TERM is set to
> >> "vt100-w", status (0)
> >> No entry for terminal type "vt100-w";
> >
> > grumble. One last bit; could you test clogin from ranicd 3.8 without altering
> > TERM?

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