in reply to Re: Reopen file when contents changed?
in thread Reopen file when contents changed?

That code worked for me and generated output has follows: 
cpu  757611 0 128970 6183389
cpu  757611 0 128970 6183507
cpu  757611 0 128970 6183608
cpu  757612 0 128970 6183708
cpu  757612 0 128970 6183809

[download]

In Section Seekers of Perl Wisdom