Readline is not SUPPOSED to finish! Here is what the manual says about
tail -f regarding this:
the tail command does not terminate after the last
specified unit of the input file has been copied, but continues to read
and copy
additional units from the input file as they become available.
The idea is that it NEVER terminates, but shows you basically everything
from the point specified on.
Another portion of the man page is clearer:
4. To follow the growth of a file, enter:
tail -f accounts
This displays the last 10 lines of the accounts file. The tail command
continues to display lines as they are added to the accounts file.
The
display continues until you press the Ctrl-C key sequence to stop it.
Steve
-- Original Message --
>All,
>
>I have a script that uses popen to start an external process (tail -f)
and
>allow me to read the results:
>
>1: stdin=os.popen('tail -f somefile')
>2: logline=re.compile('(.*?).*?- - \[(.*?)\] "(.*?) (.*?)" (.*?) (.*?)
>"(.*?)" "(.*?)".*')
>3: a=stdin.readline()
>4: print a
>5: while a:
>6: g=logline.search(a)
>7: if not g: continue
>
>The problem is that it gets to line 3 and sits waiting for the readline
to
>finish, which as far as I can see it never does.
>
>Any ideas.
>
>Phil
>
>
>
>
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