something like this? unix tail command does more fancy stuff
like it waits for timeout, and check if the file is truncated
or depending on incoming data it sleeps seconds , etc etc.
#!/usr/bin/env python
import sys, select
while True:
ins, outs, errs = select.select([sys.stdin],[],[])
for i in ins:
print i.readline()
2007/6/22, Evan Klitzke <[EMAIL PROTECTED]>:
> On 6/22/07, Evan Klitzke <[EMAIL PROTECTED]> wrote:
> > Everyone,
> >
> > I'm interested in writing a python program that reads from a log file
> > and then executes actions based on the lines. I effectively want to
> > write a loop that does something like this:
> >
> > while True:
> > log_line = log_file.readline()
> > do_something(log_line)
> >
> > Where the readline() method blocks until a new line appears in the
> > file, unlike the standard readline() method which returns an empty
> > string on EOF. Does anyone have any suggestions on how to do this?
> > Thanks in advance!
>
> I checked the source code for tail and they actually poll the file by
> using fstat and sleep to check for changes in the file size. This
> didn't seem right so I thought about it more and realized I ought to
> be using inotify. So I guess I answered my own question.
>
> --
> Evan Klitzke <[EMAIL PROTECTED]>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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