Re: copying output of Linux ioc to file

[Ralph Lange <Ralph.Lange@bessy.de>]

 On 23.07.2010 10:29, Rod Nussbaumer wrote:
> Till Straumann wrote:
> > There's also 'screen'
> >
> > HTH
> > - T.
>
> Yes.
>
> Just to expand on that a little... Screen will allow multiple 
> concurrent secure-shell connections to your IOC console, as well as 
> logging all console activities to files. It assumes your console is 
> accessible through a Linux host somehow, but this seems probable, from 
> the description you gave initially. As far as I know, most Linux 
> distributions either include Gnu screen as standard fare, or provide 
> it as a package for use with the standard package manager. At TRIUMF, 
> we use it heavily, and have a Perl/Tk application to aid in starting 
> new sessions and selecting existing session for attachment.
>
> Rod Nussbaumer
> ISAC Controls, TRIUMF
> Vancouver, Canada

In fact, screen was initially used as the standard way to start 
host-based soft IOCs in the background for later-on console access.

After reports on tech-talk in 2007 and 2008 [1] of screen hanging up 
IOCs (when users were using screen's rich features, such as browsing in 
the console history), procServ was used as an easier-to-use, a lot 
lighter  and more appropriate replacement.

Especially in combination with a generic console logging and access 
package like conserver [2], soft IOC consoles get accessible and are 
logged in the very same way as terminal-server based VME IOCs, so that 
the command "console <myioc>" connects to to that IOC - soft or VME 
based. There are pages on the EPICS Wiki that describe such a setup in 
detail. [3]

conserver is part of all major distributions, procServ is part of Debian 
and derivatives, hopefully soon Fedora (waiting to be picked up by 
Fedora for >6 months now).

Cheers,
Ralph


[1] http://www.aps.anl.gov/epics/tech-talk/2007/msg01376.php
    http://www.aps.anl.gov/epics/tech-talk/2008/msg00370.php
[2] http://www.conserver.com/
[3] 
http://www.aps.anl.gov/epics/wiki/index.php/How_to_Set_Up_a_Soft_IOC_Framework_on_Linux
    (M. Davidsaver contributed a greatly improved version of the init 
script integration
    
http://www.aps.anl.gov/epics/wiki/index.php/How_to_Set_Up_Console_Access_and_Logging_for_VME_and_Soft_IOCs