
NAME
g.findfile - Searches for GRASS data base files and sets variables for the shell.
KEYWORDS
general
SYNOPSIS
g.findfile
g.findfile help
g.findfile element=string [mapset=string] file=string [--verbose] [--quiet]
Parameters:
- element=string
- Name of an element
- mapset=string
- Name of a mapset
- Default:
- file=string
- Name of an existing map
DESCRIPTION
g.findfile is designed for Bourne shell scripts that need to search
for mapset elements, including: raster, vector maps, region
definitions and imagery groups.
The list of element names to search for is not fixed; any
subdirectory of the mapset directory is a valid element name.
However, the user can find the list of standard GRASS element names in
the file $GISBASE/etc/element_list. This is the file which
g.remove/g.rename/g.copy use to determine which files need to be
deleted/renamed/copied for a given entity type.
OUTPUT
g.findfile writes four lines to standard output:
name='file_name'
mapset='mapset_name'
file='unix_filename'
fullname='grass_fullname'
The output is /bin/sh commands to set the variable
name to the GRASS data base file name,
mapset to the mapset in which the file resides,
and file to the full UNIX path name for the named
file. These variables may be set in the /bin/sh
as follows:
eval `g.findfile element=name mapset=name file=name`
For example (raster map):
eval `g.findfile element=cell file=mymap`
NOTES
If the specified file does not exist, the variables will be set as follows:
name=
mapset=
fullname=
file=
The following is a way to test for this case:
if [ ! "$file" ]
then
exit
fi
Note that region files are searched as element=windows.
SEE ALSO
g.ask
g.filename
g.gisenv
g.mapsets
parser
AUTHOR
Michael Shapiro,
U.S.Army Construction Engineering Research Laboratory
Last changed: $Date: 2007-01-18 08:09:29 -0800 (Thu, 18 Jan 2007) $
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