g.filename - Prints GRASS data base file names.
g.filename element=string file=string [mapset=string] [--verbose] [--quiet]
- Name of an element
- Name of a database file
- Name of a mapset (default: current)
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.
writes one line to standard output:
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`
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.
U.S.Army Construction Engineering Research Laboratory
Last changed: $Date: 2006-10-25 08:30:49 -0700 (Wed, 25 Oct 2006) $
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