
NAME
g.findfile - Searches for GRASS data base files and sets variables for the shell.
KEYWORDS
general, data base files
SYNOPSIS
g.findfile
g.findfile help
g.findfile [-nl] element=string file=string [mapset=string] [--verbose] [--quiet]
Flags:
- -n
- Don't add quotes
- -l
- List available elements and exit
- --verbose
- Verbose module output
- --quiet
- Quiet module output
Parameters:
- element=string
- Name of an element
- file=string
- Name of an existing map
- mapset=string
- Name of a mapset (default: search path)
- '.' for current mapset
DESCRIPTION
g.findfile is designed for Bourne shell or Python 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 $GISBASE/etc/element_list. This is the file
which g.remove, g.rename
and g.copy use to determine which files
need to be deleted/renamed/copied for a given entity type.
NOTES
g.findfile writes four lines to standard output:
name='file_name'
mapset='mapset_name'
file='unix_filename'
fullname='grass_fullname'
The output is Bash commands to set the variable
name to the GRASS data base file name,
mapset to the mapset in which the file resides,
and file to the full UNIX path name for the named
file. These variables may be set in the Bash
as follows:
eval `g.findfile element=name mapset=name file=name`
For example (raster map):
eval `g.findfile element=cell file=elevation`
If the specified file does not exist, the variables will be set as
follows:
name=
mapset=
fullname=
file=
The following is a way to test for this case:
if [ ! "$file" ]
then
exit
fi
PYTHON
See Python
Scripting Library for more info.
import grass.script as grass
grass.find_file('elevation', element = 'cell')
SEE ALSO
g.filename,
g.gisenv,
g.mapsets,
g.parser
AUTHOR
Michael Shapiro,
U.S.Army Construction Engineering Research Laboratory
Last changed: $Date: 2011-01-20 04:10:50 -0800 (Thu, 20 Jan 2011) $
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