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Re: How to read the last updated lines from a log file

by t_rex_joe (Sexton)
on May 30, 2013 at 17:20 UTC ( [id://1036097]=note: print w/replies, xml ) Need Help??


in reply to How to read the last updated lines from a log file

Look up the "use File::Tail;" Module.
# interval = first sleep time before checking file # maxinterval = max sleep time before check the file. It is random f +rom 0 -> Max inteval # reset_tail = Action upon file being closed/reopened. 0 = Do nothin +g, -1 = Read in all file, DEFAULT = -1. $filen=File::Tail->new(name=>$if, interval=>1, maxinterval=>5, reset +_tail=>0); while(defined($line=$filen->read)) { print "$line\n"; }
From there you can parse some time infomation with "time()" for epoch conversion in seconds. This will effectively open a "tail -f" to the file and read in the log as it's written to the file. $line is the latest line read from file. Joe

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