CALL GetEnv(Name, Value)
Name: CHARACTER; scalar; INTENT(IN).
Value: CHARACTER; scalar; INTENT(OUT).
Intrinsic groups: unix.
Description:
Sets Value to the value of environment variable given by the
value of Name ($name in shell terms) or to blanks if
$name has not been set.
A null character (`CHAR(0)') marks the end of
the name in Name---otherwise,
trailing blanks in Name are ignored.
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