From: Josh Endries <josh@...>
Date: 2004-09-01T06:08:57+09:00
Subject: Problem with File::Tail (no new lines getting processed)

Hi everyone,

I just started learning Ruby a couple days ago. It's pretty cool! I 
went to school and learned OO C++. Anyway, I'm trying to make a 
script that tails a log file (output from syslog-ng) and grabs spam 
messages. Eventually it will create some amavisd-new statistics. I'm 
having trouble tailing the file, though. When I start the program it 
spits out the entire file (unless I have rewind in the open() call), 
then sits there "tailing" but no new lines get displayed. Normal 
`tail` works from the console... This is all on a FreeBSD 4.10 system.

Here is my script; I was using the commented-out portion earlier but 
it wasn't working so I dumped in an example almost verbatim. It still 
doesn't work correctly:

#!/usr/local/bin/ruby

require 'file/tail'

File::Tail::Logfile.open("/var/log/all.log", :rewind => 10) do |log|
    log.tail { |line| puts line }
end

#File::Tail::Logfile.open("/var/log/all.log") {
#       |file|
#
#       file.tail {
#               |line|
#
#               if /SPAM=TAG/i.match(line)
#                       puts line
#               end
#       }
#}

Thanks for any advice,

Josh