Any idea to emulate tail -f

[Joel Juvenal Rivera Rivera]

I want to make something very similar to the command tail -f (follow a
file), i have been trying with some while True and some microsleeps
(about .1 s); did someone has already done something like this?

And about the file is the apache acceslog of a site with a lot of
traffic.

Regards

joe / Joel Rivera

 

[CTO]

I want to make something very similar to  the command tail -f (follow a
file), i have been trying  with some while True and some microsleeps
(about .1 s); did someone has already done something like this?

And about the file is the apache acceslog  of a site with a lot of
traffic.

Regards    

joe / Joel Rivera

You might want to try http://pyinotify.sourceforge.net/. Works well on
Linux systems. Otherwise, I'd watch the mtime on the file and fork to
handle the change.

Geremy Condra

 

[Paul Scott]

You might want to try http://pyinotify.sourceforge.net/. Works well on
Linux systems. Otherwise, I'd watch the mtime on the file and fork to
handle the change.

pyinotify works really well. If you need to watch a file, simply use the
IN_MODIFY watch to fire off a notification when the file changes. Then
you can use that event in anything you may need.

I put up some basic pyinotify usage here:
http://www.paulscott.za.net/index.p...ostid=ps123_2560_1240747637&action=viewsingle but if you need some more help with it, read the docs and then ask me also

-- Paul
http://www.paulscott.za.net
http://twitter.com/paulscott56
http://avoir.uwc.ac.za
--

 

[Lawrence D'Oliveiro]

I want to make something very similar to the command tail -f (follow a
file) ...

<http://codecodex.com/wiki/index.php?title=Monitoring_a_Log_File>

 

[Iain King]

I want to make something very similar to  the command tail -f (follow a
file), i have been trying  with some while True and some microsleeps
(about .1 s); did someone has already done something like this?

And about the file is the apache acceslog  of a site with a lot of
traffic.

Regards    

joe / Joel Rivera

This is very interesting, about using Generator Expressions:
http://209.85.229.132/search?q=cache:ZHrV4E0eTI8J:www.dabeaz.com/generators/Generators.pdf

Relevant stuff about 'tail -f' is on page 39, but I'd read the whole
thing if you can.

Iain

 

[J Kenneth King]

This is very interesting, about using Generator Expressions:
http://209.85.229.132/search?q=cache:ZHrV4E0eTI8J:www.dabeaz.com/generators/Generators.pdf

Relevant stuff about 'tail -f' is on page 39, but I'd read the whole
thing if you can.

Iain

+1

I second this suggestion. I've used this method in many scripts of
late and it is quite handy.

He even takes it a little further and shows you some neat things you
can do with it later on.