[rancid] clogin adding 'exit' command?

[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.




On 8 May 2018 at 16:20, heasley <heas at 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