Lets your program treat environment variables as simple variables instead
of having to access them from the
pseudo-hash where they
use Env qw(
Internally, Env uses an
ties suitably named environment variables to global Perl variables
with the same names. By default, it ties all variables yielded by
. A "suitable" environment
has a name that begins with an alphabetic
character and contains only alphanumeric characters or underscores.
is invoked with arguments, the arguments are
as a list of environment variables to
, but the variables don't have to
exist yet. After a variable has been tied, you can use it
like a normal variable, accessing or changing its value.
You untie a variable by setting its value to