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Re^3: the sands of time(in search of an optimisation)

by clinton (Priest)
on Mar 04, 2008 at 14:24 UTC ( #671882=note: print w/ replies, xml ) Need Help??


in reply to Re^2: the sands of time(in search of an optimisation)
in thread the sands of time(in search of an optimisation)

If you're on Linux, you probably want to look at Linux::Inotify or Linux::Inotify2, which provide similar functionality


Comment on Re^3: the sands of time(in search of an optimisation)
Re^4: the sands of time(in search of an optimisation)
by spx2 (Chaplain) on Mar 09, 2008 at 17:54 UTC
    thank you very much for your suggestion.
    yours and Browser_Uk were the same ideas actually
    so I have documented myself a bit and written a daemon
    which is sitting and monitoring for changes in files.
    the following is what I cam up with(teste and works excellent):
    #!/usr/bin/perl #this lightweight daemon will run in the background and #for each new file that is modified and closed it will re-hash it and +update #its entry in the database use strict; use warnings; # #bugs encountered: # #1)does not update as expected in database the new sha1 #2)$mtime seems to be very VERY different from DateTime->now which is +weird #3)bug found in SHA1db find_or_update not finding correctly if there a +re any files in the db with #that name # # use Linux::Inotify2; use Data::Dumper; use DateTime; use SHA1db; use YAML qw/LoadFile/; $|=1; SHA1db->connect(); my $inotify = new Linux::Inotify2(); my $config_path = 'config.yml'; my $config = LoadFile($config_path); for (map {$_->{path}} @{ $config->{directories} }) { print "tracking $_\n"; $inotify->watch($_, IN_ALL_EVENTS); } while () { my @events = $inotify->read; unless (@events > 0) { print "read error: $!"; last ; }; for(@events) { next unless($_->mask & IN_CLOSE_WRITE); my $mtime =( lstat($_->fullname) )[9]; next unless $mtime; printf "updating checksum_db for file %s modified now: %s\n",$ +_->fullname,DateTime->from_epoch(epoch=>$mtime); #we should add a check to see if this file passes the regex #filter & link filter & dir filter & size filter unless(SHA1db::find_or_update($_->fullname,$mtime)) { printf "not found in db,adding...\n"; SHA1db::add_to_db(SHA1db::file2sha1($_->fullname),$mtime,- +s _ ,$_->fullname); #add it to db }; }; }; print "daemon stopped";

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