From: "James F.Hranicky" <jfh@...>
Date: 2002-08-02T23:58:24+09:00
Subject: Re: A very basic tail -f implementation

On Thu, 1 Aug 2002 05:50:17 +0900
James F.Hranicky <jfh@cise.ufl.edu> wrote:

> On Wed, 31 Jul 2002 21:02:04 +0900
> Florian Frank <flori@eavesdrop.ping.de> wrote:
> 
> > I could try to document a little more in the best english I'm capable
> > of. That is, it will probably be quite awful. ;)
> 
> A couple of suggestions:

One more suggestion: checkpoint:

	log.next { |line|
	    process(line)
	    log.checkpoint	# write out inode and filepos to a file
				# or something
	}

Something like
	
	def checkpoint
	    open_checkpoint_file
	    write_inode_and_pos
	    sync_checkpoint_file
	    close_checkpoint_file
	end

So, after a crash or reboot, you could start back up where you
left off, unless the inode has changed, and then you'd start at
the beginning of the new file.

Jim