NAME¶
g.filename - Prints GRASS data base file names.
KEYWORDS¶
general, map management
SYNOPSIS¶
g.filename
g.filename help
g.filename element=
string file=
string
[
mapset=
string] [--
verbose] [--
quiet]
Parameters:¶
- element=string
-
Name of an element
- file=string
-
Name of a database file
- mapset=string
-
Name of a mapset (default: current)
DESCRIPTION¶
g.filename is designed for Bourne shell scripts that need to know the
full file name, including it's path, for mapset elements, like raster, vector
and site 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.filename writes one line to standard output: file='
full_file_pathname'
The output is a
/bin/sh command to set the variable specified by the file
name to the full UNIX path name for the data base file. This variable
may be set in the
/bin/sh as follows:
eval `g.filename element=
name mapset=
name file=
name`
NOTES¶
This routine generates the filename, but does not care if the file (or mapset or
element) exists or not. This feature allows shell scripts to create new data
base files as well as use existing ones.
If the mapset is the current mapset,
g.filename automatically creates the
element specified if it doesn't already exist. This makes it easy to
add new files to the data base without having to worry about the existence of
the required data base directories. (This program will not create a new
mapset, however, if that specified does not currently exist.)
The program exits with a 0 if everything is ok; it exits with a non-zero value
if there is an error, in which case file=
'full_file_pathname' is not
output.
SEE ALSO¶
g.ask
g.findfile
g.gisenv
parser
AUTHOR¶
Michael Shapiro, U.S.Army Construction Engineering Research Laboratory
Last changed: $Date: 2011-11-08 12:29:50 +0100 (Tue, 08 Nov 2011) $
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