=over

=item chdir EXPR

Changes the working directory to EXPR, if possible.  If EXPR is omitted,
changes to the directory specified by C<$ENV{HOME}>, if set; if not,
changes to the directory specified by C<$ENV{LOGDIR}>.  If neither is
set, C<chdir> does nothing.  It returns true upon success, false
otherwise.  See the example under C<die>.

=back