Re: [magic sv logging]

[Lorenzo Beretta <lory.fulgi@infinito.it>]

On 21/09/2012 04:25, Mike Buland wrote:
> I took a different approach and monitored the log output of svlogd, since I
> wanted the logs anyway.  This is some code that well help you with that,
> anyway:
>
> import os
> import time
> import stat
>
> fIn = open("current", "r")
> sid = os.stat("current")[stat.ST_INO]
>
> while True:
>          try:
>                  sidNew = os.stat("current")[stat.ST_INO]
>                  if sidNew != sid:
>                          fIn.close()
>                          fIn = open("current", "r")
>                          sid = sidNew
>          except:
>                  time.sleep( 1 )
>                  continue
>
>          while True:
>                  l = fIn.readline()
>                  if l is None or l == '':
>                          break
>                  # do something interesting with your line here
>                  time.sleep( 1 )
>
> This will read everything from current, and when current moves, it will
> read what's left, open the new current, and read all of it.  I use it to
> monitor apache log output, and it hasn't failed me yet.
>
> --Mike

Unless I missed something, it looks as if you're reimplementing the '-F' 
flag in tail :)