[GRASS5] New initialization code

[Andreas Lange]

Hi Eric,

the cygwin setup is something like Unix inside Windows.
You can only start the grass command shell from within the cygwin shell
(bash). It would be very complicated to set up a batch script to start
the grass shell, as e. g. the symbolic links are simulated on Win9x by
the cygwin shell. And you'll not be able to execute shell scripts, as
the magic line #!/bin/sh is only interpreted by the cygwin shell. 

If you start the X server from within the cygwin shell, the DISPLAY env
var will be set. I have not tested if the X11R6.4 X server sets the
DISPLAY var for the user env in windows. 

I have tested that i can run the old grass5 shell from within cygwin.
Apart from the problems with the keys (there is IMHO an unrecognized
terminal type set) it already works. You can do everything except the
d.* functions and tcltkgrass/wish scripts. 

cu,

Andreas

Eric Mitchell wrote:
> 
> By default, there is no $DISPLAY environment variable set on Windows.
> Windows does not have an X server installed by default.  There are
> a few on the market that you can purchase, if so interested.  If you
> are checking for a $DISPLAY env. var., you probably only want to do
> so if you're not running on Windows anyway.
> 
> However, on Windows, you also have the (potential) problem of how
> to start a grass5 environment.  This would probably best be
> accomplished with a batch file, as you don't have to stress about
> the gross platform dependencies.  We do this at work:  shell
> scripts for the unix platforms, batch files for Windows.  It seems
> to work ok.
> 
> Andreas Lange wrote:
> >
> > Hi Justin, Hi Eric,
> >
> > the $DISPLAY is IMHO the best solution to the discussed problem.
> > Check if $DISPLAY is set and you know for sure that X is running.
> > If you next search for the wish executable in the user path i think that
> > in most of the cases this should work and we can start with the GUI
> > first. Otherwise a fallback to text mode would be ok.
> > This applies to the windows setup too, as the DISPLAY variable is set
> > only if X is running (The X server seems still to be a little unstable).
> > I'll check for the name of wish/tk shell in cygwin later.
> >
> > Thanks Eric for this idea.
> > I agree that it is desirable to start up with a nice GUI. Most software,
> > even if using commands typed in a window, uses a GUI today.
> >
> > Andreas
> >
> > Justin Hickey wrote:
> > >
> > > Hi Eric
> > >
> > > "Eric G . Miller" wrote:
> > > > One thing you should consider too, is checking if the $DISPLAY
> > > > environment variable is set.  Could be a user is running in a console
> > > > only mode (console, telnet, ssh with no X forwarding).  Haven't a clue
> > > > about Windows in this regard.
> > >
> > > Oooh! Good catch, I never thought of that one. I'll look into it. Does
> > > this problem even apply on Windows?
> > >
> > > Thanks.
> > >
> > > --
> > > Sincerely,
> > >
> > > Jazzman (a.k.a. Justin Hickey)  e-mail: jhickey at hpcc.nectec.or.th
> > > High Performance Computing Center
> > > National Electronics and Computer Technology Center (NECTEC)
> > > Bangkok, Thailand
> > > ==================================================================
> > > People who think they know everything are very irritating to those
> > > of us who do.  ---Anonymous
> > >
> > > Jazz and Trek Rule!!!
> > > ==================================================================
> > >
> > > ----------------------------------------
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> >
> > --
> > Andreas Lange, 65187 Wiesbaden, Germany, Tel. +49 611 807850
> > Andreas.Lange at Rhein-Main.de - A.C.Lange at GMX.net
> >

-- 
Andreas Lange, 65187 Wiesbaden, Germany, Tel. +49 611 807850
Andreas.Lange at Rhein-Main.de - A.C.Lange at GMX.net



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