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Name: GRGENV

Purpose: get value of PGPLOT environment parameter

Category: GRAPHICS

File: pgplot.src

Author: T.J. Pearson

Use: see description below.

Description:

SUBROUTINE GRGENV(NAME, VALUE, L)
CHARACTER*(*) NAME, VALUE
INTEGER L

Return the value of a PGPLOT environment parameter. In Sun/Convex-UNIX,
environment parameters are UNIX environment variables; e.g. parameter
ENVOPT is environment variable PGPLOT_ENVOPT. Translation is not
recursive and is case-sensitive.

Arguments:
NAME : (input) the name of the parameter to evaluate.
VALUE : receives the value of the parameter, truncated or extended
with blanks as necessary. If the parameter is undefined,
a blank string is returned.
L : receives the number of characters in VALUE, excluding
trailing blanks. If the parameter is undefined, zero is
returned.

Updates: Oct 16, 1998: JPT document extracted from 5.2.0 source;
Fortran source copied from GIPSY's v4.9E.