creating python daemon ?

[vineet daniel]

On Sep 21, 9:47 pm, de... at web.de (Diez B. Roggisch) wrote:
> vineet daniel <vineetdan... at gmail.com> writes:
> > Hi
>
> > I have succesfully created daemon with python script and as next step
> > I am trying to give input to that python script daemon from Apache
> > Logs....here I have got stuck and I have even checked IRC python
> > channel for solution. Apache is able to call the file but fails to
> > execute it properly and I get this error continuosly :
>
> > piped log program '/var/www/html/test.py' failed unexpectedly
>
> > How do I rectify the above error and make adjustment to the code so
> > that it takes input from apache.
>
> > code that I am using is as follows :
>
> > #! /usr/bin/env python
> > import sys,os
> > pid = os.fork()
> > os.chdir("/var/www/html/")
> > os.setsid()
> > os.umask(0)
> > #this line will read apache log in real time as redirected from the
> > CustomLog directive of Apache.
> > log = sys.stdin.readlines()
> > f = open('/var/www/logmongo.txt','a') # append log to this text file
> > f.write(log)
>
> > I'd appreciate if anybody could share the code that they used for
> > daemon or used with Apache CustomLog directive.
>
> The above code looks errornous - you don't check for the return-value of
> PID & take appropriate action. Like
>
> There is a daemonization recipe on active-state, which works nicely for
> me.
>
> http://code.activestate.com/recipes/278731-creating-a-daemon-the-pyth...
>
> Diez

Hi Diez

Thanks for pointing that out.
Ever tried giving input to such python daemons from a dynamic source
like Apache logs which get generated in real time. I want apache to
directly write to this python daemon which in turn will process the
logs the way I want. Any help will help me immensely.