Date: Tue, 09 Apr 2002 12:32:27 -0500 From: Sean O'Neill <sean@seanoneill.info> To: Zhihui Zhang <zzhang@cs.binghamton.edu>, freebsd-questions@freebsd.org Subject: Re: monitor the growth of a file. Message-ID: <5.1.0.14.0.20020409123041.00ad6de0@postoffice.swbell.net> In-Reply-To: <Pine.SOL.4.21.0204091307360.2802-100000@onyx>
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At 01:09 PM 4/9/2002 -0400, Zhihui Zhang wrote:
>I have a text file that grows steadily by an application. Is there a way I
>can monitor the growth of it? One way is to write a script with a line
>like "cat filename | tail" in a loop. But is there a better way?
Not if you want to hurt yourself - LOL. If you want to see content as it
is added simply do a "tail -f <filename>". If you want to monitor its
"growth" you need something like (I use ksh93 - modify it for your own shell):
#!/usr/local/bin/ksh
PREV=$(ls -l <filename> | awk '{print $5}')
while [ 1 ]; do
sleep 30
CURR=$(ls -l <filename> | awk '{print $5}')
echo $((CURR - PREV))
PREV=$CURR
done
--
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Sean O'Neill
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