[GRASS-user] grass env

[Glynn Clements]

maven apache wrote:

> I have post this problem before, I want to run grass in command line model
> so I can call them in java at that time,however it often cause some
> unexpeced errors.
> So today I change to Ubuntu, and I install grass use sudo apt-get install
> grass.
> 
> Now I also want to call grass in my java code but in the Ubuntu platform, I
> want to know which environment variables are needed, so I  did some tests.
> First I run grass in text model in the ternimal by " grass -text",
> and I chose the location and mapset,it works, then I use command "set >
> /home/kk/var" to get all the environment variablse using by grass ,then I
> open a new ternimal to get the normal env vars by " set > /home/kk/varn" .
> Then  I compare the two files and tried to find the differences. I found
> that there are more variables in the varn rather than var (shown below):
> -----------
> GISBASE=/usr/lib/grass64
> GISRC=/tmp/grass6-kk-9581/gisrc
> GIS_LOCK=9581
> GRASS_GNUPLOT='gnuplot -persist'
> GRASS_HTML_BROWSER=x-www-browser
> GRASS_LD_LIBRARY_PATH=/usr/lib/grass64/lib
> GRASS_PAGER=pager
> GRASS_PERL=/usr/bin/perl
> GRASS_PROJSHARE=/usr/share/proj
> GRASS_PYTHON=python
> GRASS_SH=/bin/sh
> GRASS_TCLSH=tclsh
> GRASS_VERSION=6.4.0RC5
> GRASS_WISH=wish
> -----------
> So I want to know if these vars are enough?

You also need:

PATH=$GISBASE/bin:$GISBASE/bin:$PATH
LD_LIBRARY_PATH=$GISBASE/lib
PYTHONPATH=$GISBASE/etc/python

[PYTHONPATH is only relevant if running Python scripts which use the
grass.script modules.]

Many of the above are unnecessary.

GRASS_TCLSH and GRASS_PERL aren't used. GRASS_SH is only used on
Windows. GRASS_PROJSHARE defaults to /usr/share/proj if not set. 
GRASS_WISH, GRASS_PYTHON, GRASS_HTML_BROWSER and GRASS_LD_LIBRARY_PATH
are only relevant for interactive use. GRASS_GNUPLOT is only used by
i.spectral.

Although it shouldn't matter, I suggest GRASS_PAGER=cat and
GRASS_MESSAGE_FORMAT=silent.

If you need to use any display commands, you also need to set
GRASS_RENDER_IMMEDIATE=TRUE, and may want to use some of the variables
documented in the "pngdriver" manual page to control the output.

-- 
Glynn Clements <glynn at gclements.plus.com>