Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

g.filename(1grass)


NAME

   g.filename  - Prints GRASS data base file names.

KEYWORDS

   general, map management, scripts

SYNOPSIS

   g.filename
   g.filename --help
   g.filename   element=string   file=string   [mapset=string]    [--help]
   [--verbose]  [--quiet]  [--ui]

   Flags:
   --help
       Print usage summary

   --verbose
       Verbose module output

   --quiet
       Quiet module output

   --ui
       Force launching GUI dialog

   Parameters:
   element=string [required]
       Name of an element

   file=string [required]
       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 GIS 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 module 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.findfile, g.gisenv

AUTHOR

   Michael Shapiro, U.S.Army Construction Engineering Research Laboratory

   Last changed: $Date: 2015-02-14 22:07:18 +0100 (Sat, 14 Feb 2015) $

SOURCE CODE

   Available at: g.filename source code (history)

   Main  index | General index | Topics index | Keywords index | Graphical
   index | Full index

    2003-2016 GRASS Development Team, GRASS GIS 7.2.0 Reference Manual



Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.



Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.



Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.



Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.


birds banner