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
On Thu, Sep 20, 2012 at 5:35 PM, Sergiusz Pawlowicz <
sergiusz.pawlowicz@gmail.com> wrote:

> Hi,
> I am trying to write a python script which can be put in place of
> svlogd/multilog, but I am stuck just at the beginning.
>
> The test script is pretty simple, it just forwards stdin to stdout:
>
> def main():
>
>     while True:
>         try:
>             line = raw_input()
>             print 'got', line
>         except EOFError:
>             print 'done'
>             pass
>
>   if __name__ == '__main__':
>     main()
>
> It works, but not as desired, as the script is being restarted by runsv
> constantly, it seems after it finishes reading stdin. Could you
> please help me how can run that continuously listening to stdin?
>
> cheers,
> Serge
> --
> https://pawlowicz.name/
>