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Re: Using Screen



Thanks Andrew for your notes.  I get hint from your script about the
terminal environment.  I guess this is needed.  I run this command and
the keyboard arrow up/down key is now captured correctly when running
DOSEMU.

[me@host ~]$ screen -U -T vt100

My test is continuing.

rgds,
Yul

On Fri, Jan 16, 2009 at 3:08 AM, Andrew Brooks <arb@xxxxxxxxxxxxxxxx> wrote:
> On Thu, 15 Jan 2009 18:38:01 -0000, Alain M. <alainm@xxxxxxxxx> wrote:
>>
>> Do you have instructions about using screen that you can share?
>
> Below are my notes which I hope you find helpful.  The remote viewer
> logs in with ssh and runs "start_viewer".  On the dos PC you have
> already started "start_screen" which calls "start_dos".
>
>> If it is still needed, I can digg info about installing DOS's fonts
>> in the client machine. it should solve the box-drawing problem.
>
> That would be useful, thanks.
>
> Andrew
>
>
> On the "viewer" PC
>
> To view a dosemu session properly you need to open a terminal window
> with the correct character encoding. eg. Gnome Terminal using IBM850.
> Although the example below says UTF-8 for some reason.
>
> DOSView.desktop:
> [Desktop Entry]
> Version=1.0
> Encoding=UTF-8
> Name=DOSView
> Type=Application
> Exec=ssh -t user@dospc /bin/bash -lc ./start_viewer
> TryExec=
> X-GNOME-DocPath=
> Terminal=true
> Name[en_US]=DOSView
> GenericName[en_US]=
> Comment[en_US]=
> GenericName=
> Comment=
>
> Gnome terminal preferences are stored in ~/.gconf/apps/gnome-terminal
>
> However Gnome terminal sucks up too much CPU time so xterm is better.
> But I haven't yet found a way of getting the correct character encoding
> in xterm.
>
>
> On the "server" PC (let's call it dospc)
>
> The start_viewer script:
>
> ---------------------------------------------------------
> #!/bin/sh
>
> numscreens=`ls ~user/tmp/*.drive | wc -l`
> if [ 0$numscreens -ne 1 ]; then
>        echo There is not a single screen session for attachment
>        echo Is start_screen running?
>        exit 1
> fi
>
> session=`basename ~opr/tmp/*.drive`
> #screen -x $session
> screen -rx
> --------------------------------------------------------
>
>
> The start_screen script:
> --------------------------------------------------------
> #!/bin/sh
> # default terminal type is "linux" but use "vt100" because the
> # line-drawing characters work better
> export TERM=vt100
> screen -S drive -s ./start_dos #-T ansi
> --------------------------------------------------------
>
>
> The start_dos script:
> -------------------------------------------------------
> #!/bin/sh
> # 1.00 arb Thu Mar  3 12:12:44 GMT 2005
> # Limit processes to 128MB of virtual memory (limit).
> # Run dosemu in super-user mode in order to access hardware (-s).
> # Automatically restart dosemu (after 30 seconds) if it fails.
> vm_limit=131072     # KB
> TZ=UTC0; export TZ  # Timezone without daylight savings
> ulimit -v $vm_limit
> while true; do
>        dosemu -s
>        echo Restarting dosemu in 30 seconds
>        echo Press CTRL-C to abort
>        sleep 30
> done
> -------------------------------------------------------
>
>
> The .screenrc config file has the following additions:
>
> multiuser on # allow multiple users
> defc1 off    # allow 8-bit chars ("on" uses top bit set chars as control funcs)
> vbell off    # use audible bell
>
>
> The dosemu.conf config file changes:
> $_term_char_set = "ibm"
>
>
> When viewing using screen you can use ctrl-a then d to detach the
> session and reconnect to it later.
>
>
> -------------------------------------------------------
>
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