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#!/usr/bin/perl -I/usr/depot/lib/perl5
# notifies a PSYC target about changes in a filesystem. -lynX 2005
# currently using famd as Inotify.pm isn't really ready yet.
# the script will report content changes to files in the directory.
#
# a different approach would be to implement a fuse user-space filesystem
# which generates psyc notifications as it is being used and does some
# extra useful jobs like store the files in some smart way (compressed,
# encrypted, databased, replicated, psyc-synchronized) ...
# see http://fuse.sourceforge.net/
# and http://about.psyc.eu/Software_Projects
# on Multicast Filesystems
# this again only works for limited file spaces, not entire systems
#
# GENERAL
# ~*~*~*~
# If you don't own an always running PSYC server yet, visit
# www.psyc.eu and consider using the PSYCdevs' brain community.
# Or get your very own psyced from http://www.psyced.org
$target = shift;
$base = shift;
die <<X unless $base;
please provide target and directory to monitor as parameters, as in
$0 psyc://psyced.org/\@files /tmp
X
$mc = '_notice_update_file_';
use Net::PSYC;
$user = $ENV{'USER'};
$host = $ENV{'HOST'};
chdir($base);
$base .= '/' unless $base =~ m#/$#;
use SGI::FAM;
my $fam=new SGI::FAM;
$fam->monitor($base);
my $event=$fam->next_event;
print "In ", $event->filename, " we find:\n\n ";
while (1) {
my $event=$fam->next_event;
last if $event->type eq 'end_exist';
print ' ', $event->filename;
}
print "\n\nNow waiting for changes.\n";
while (1) {
my $event=$fam->next_event; # blocks. see manual for async interface.
$_ = $event->filename;
print "$_ [", $event->type, "]\n";
next if /\.swp/; # ignore vim swap files
sendmsg($target, $mc.$event->type,
"([_nick_host]File) [_operation]: " .
"[_path_file][_name_file] ([_size_file])", {
_nick_user => $user, _nick_host => $host, _path_file => $base,
_operation => $event->type, _name_file => $_, _size_file => (-s $_)
} );
}
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