我没想到只有当我手动终止分叉进程时才会终止此代码.这是正确的行为吗？

use strict;
use warnings;

STDOUT->autoflush();

use IO::Select;

open(my $ph,"-|","perl -e 'sleep 1 while 1'");

my $sel = IO::Select->new();

$sel->add($ph);

$sel->can_read(2) or warn "timeout\n";

print "woohoo?\n";