Re: IOC shell arrow keys not working. Yielding "^[[A" or "^[[Something"

["Marco A. Barra Montevechi Filho via Tech-talk" <tech-talk at aps.anl.gov>]

Turns out its a problem with unix sockets, netcat and/or procServ!

We were running our IOCs with procServ and setting it to a unix socket. To enter the IOC shell, we did

docker exec -it myImage nc -U ./socket_file

When changing that to tcp sockets and doing telnet localhost port_number, things go just fine.

Has anyone here bumped into this before?

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From: Mark Rivers <rivers at cars.uchicago.edu>
Sent: 18 September 2023 18:34
To: Marco A. Barra Montevechi Filho <marco.filho at lnls.br>
Cc: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>; SWC <swc at lnls.br>
Subject: Re: IOC shell arrow keys not working. Yielding "^[[A" or "^[[Something"

 

If you are using base 7.0.7 and an older Linux compiler like RHEL 7 then libreadline will not be used by default. You can update base or edit a CONFIG_SITE file in base.

Mark

Sent from my iPhone

On Sep 18, 2023, at 5:21 PM, Marco A. Barra Montevechi Filho via Tech-talk <tech-talk at aps.anl.gov> wrote:



Hi all. Its been some time since in some of my IOCs the IOC shell seems to work in misterious ways with the arrow keys.

For unknown reason, most IOCs do have the functionality of using up and down arrow keys to navigate command history and left and right to navigate the line in which im writing:

but some other times, pressing up, left, down and right prints:

^[[A^[[D^[[C^[[B

But i couldnt find any major compilation difference between the applications. Am i missing something?
All my systems have libreadline-dev installed...

Thanks for any hints,

Marco

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