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   This program is to be used in shell/perl/python scripts, so the author
   does not need to use the echo program. The advantage of g.message is
   that it formats messages just like other GRASS modules do and that its
   functionality is influenced by the GRASS_VERBOSE and
   GRASS_MESSAGE_FORMAT environment variables.

   The program can be used for standard informative messages as well as
   warnings (-w flag) and fatal errors (-e flag). For debugging purposes,
   the -d flag will cause g.message to print a debugging message at the
   given level.

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   Messages containing "=" must use the full message= syntax so the parser
   doesn't get confused.

   Messges containing '!' and '$' must use single 'quotes' to avoid
   unwanted shell translation.

   If you want a long message (mutli-line) to be dealt with as a single
   paragraph, use a single call to g.message with text split in the script
   using the backslash as the last character. (In shell scripts don't
   close the "quote")

   A blank line may be obtained with: g.message ""

   Redundant whitespace will be stripped away.

    VERBOSITY LEVELS

   Controlled by the "GRASS_VERBOSE" environment variable. Typically this
   is set using the --quiet or --verbose command line options.
     * 0 - only errors and warnings are printed
     * 1 - progress messages are printed
     * 2 - all module messages are printed
     * 3 - additional verbose messages are printed

    DEBUG LEVELS

   Controlled by the "DEBUG" GRASS gisenv variable. (set with [1]g.gisenv)
   Recommended levels:
     * 1 - message is printed once or few times per module
     * 3 - each row (raster) or line (vector)
     * 5 - each cell (raster) or point (vector)

СÐ. ТÐÐÐÐ

   [2]GRASS variables and environment variables,
   [3]g.gisenv, [4]g.parser

ÐÐТÐÐ

   Jachym Cepicky

   Last changed: $Date: 2007-05-29 22:42:20 -0500 (ÐÑ, 29 май 2007) $

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References

   1. file://localhost/root/tmp/2/fin/g.gisenv.html
   2. file://localhost/root/tmp/2/fin/variables.html
   3. file://localhost/root/tmp/2/fin/g.gisenv.html
   4. file://localhost/root/tmp/2/fin/g.parser.html