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monitoring a circular file

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# 8  
Old 03-12-2009
Quote:
Originally Posted by sdilucca
any way to do this without relying on the time stamp? I ask because some of the events happen so quickly that they share the same time stamp.
If they have the same timestamp, then what else would you sort by?

Also, I realized that the timestamp isn't reliable anyway, because when you roll over from December to January, the December (12) stamps will be "higher" than the January (01) stamps.
# 9  
Old 03-12-2009
The above solution will work most of the time. It will give issues when the the data crosses over a year.
You may try the following, it does not rely on date to get the changes:
Assumption: circular file = f1
watch -n 5 "diff /var/tmp/f2.$LOGNAME.tmp f1 | sed -n '/^>/ { s/^> //;p;}';cp f1 /var/tmp/f2.$LOGNAME.tmp"
$LOGNAME in the above command will allows multiple users to check the file.

-Ramesh
# 10  
Old 03-12-2009
Wow! This is some potent stuff. I am going to try this. First I will read up on "sed". Will let you guys know the results.
# 11  
Old 03-12-2009
worked like a charm! Thanks so much.
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