imagery
group files, etc., in the GRASS data base.
OPTIONS
If the user runs g.filename without command line
arguments (i.e., simply types g.filename), this
program will prompt the user for input using the standard
parser.
Parameters:
- element=name
- The name of a GRASS data base element (i.e., directory
within the GRASS mapset location).
- mapset=name
- The name of a GRASS data base mapset. As a
convenience, a single dot (.) can be used to designate the
current mapset.
- file=name
- The name of a GRASS data base file.
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
