From: "Rebhan, Gilbert" <Gilbert.Rebhan@...>
Date: 2007-08-22T19:27:16+09:00
Subject: Re: tail, start reading at EOF

 
-----Original Message-----
From: Bertram Scharpf [mailto:lists@bertram-scharpf.de] 
Sent: Wednesday, August 22, 2007 12:14 PM
To: ruby-talk ML
Subject: Re: tail, start reading at EOF

/*
Hi,

Am Mittwoch, 22. Aug 2007, 18:20:12 +0900 schrieb Rebhan, Gilbert:
> how to alter tail function to start at the end
> of the file, not reading the lines already existing in file ? =

  file.seek 0, IO::SEEK_END
*/

thanks, with your pointer and an older post by Robert Klemme
i have a working solution now =

def tail(file, interval=1) 
   raise "Illegal interval #{interval}" if interval < 0 

   File.open(file) do |io|
      io.seek 0, IO::SEEK_END
     loop do
       while ( line = io.gets )
         puts line
       end 
       # uncomment next to watch what is happening 
       puts "-" 
       sleep interval 
     end 
   end 
end

Anything to improve ?

Regards, Gilbert