mirror of
https://github.com/fhem/fhem-mirror.git
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460 lines
11 KiB
Perl
Executable File
460 lines
11 KiB
Perl
Executable File
#!/usr/bin/perl
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##############################################################################
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# $Id$
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##############################################################################
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#
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# presenced
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# checks for one or multiple bluetooth devices for their presence state
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# and report this to the 73_PRESENCE.pm module.
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#
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# Copyright by Markus Bloch
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# e-mail: Notausstieg0309@googlemail.com
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#
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# This file is part of fhem.
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#
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# Fhem is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 2 of the License, or
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# (at your option) any later version.
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#
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# Fhem is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with fhem. If not, see <http://www.gnu.org/licenses/>.
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#
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##############################################################################
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use IO::Socket;
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use IO::Select;
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use File::Basename;
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use Getopt::Long;
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use threads;
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use threads::shared;
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use Thread::Queue;
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use Time::HiRes qw(gettimeofday);
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use warnings;
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use strict;
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sub Log($$);
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my $new_client;
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my $server;
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my $client;
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my $buf;
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my $querylocker :shared = int(time() - 15);
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my %queues;
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my $log_queue = Thread::Queue->new();
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my $opt_d;
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my $opt_h;
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my $opt_v = 0;
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my $opt_p = 5111;
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my $opt_P = "/var/run/".basename($0).".pid";
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my $opt_l;
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Getopt::Long::Configure('bundling');
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GetOptions(
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"d" => \$opt_d, "daemon" => \$opt_d,
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"v+" => \$opt_v, "verbose+" => \$opt_v,
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"l=s" => \$opt_l, "logfile=s" => \$opt_l,
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"p=i" => \$opt_p, "port=i" => \$opt_p,
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"P=s" => \$opt_P, "pid-file=s" => \$opt_P,
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"h" => \$opt_h, "help" => \$opt_h);
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Log 0, "=================================================" if($opt_l);
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Log 1, "started with PID $$";
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if(-e "$opt_P")
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{
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print timestamp()." another process already running (PID file found at $opt_P)\n";
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print timestamp()." aborted...\n";
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exit 1;
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}
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sub print_usage () {
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print "Usage:\n";
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print " presenced -d [-p <port>] [-P <filename>] \n";
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print " presenced [-h | --help]\n";
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print "\n\nOptions:\n";
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print " -p, --port\n";
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print " TCP Port which should be used (Default: 5111)\n";
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print " -P, --pid-file\n";
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print " PID file for storing the local process id (Default: /var/run/".basename($0).".pid)\n";
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print " -d, --daemon\n";
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print " detach from terminal and run as background daemon\n";
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print " -v, --verbose\n";
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print " Print detailed log output\n";
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print " -h, --help\n";
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print " Print detailed help screen\n";
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}
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if($opt_d)
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{
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daemonize();
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}
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if($opt_h)
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{
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print_usage();
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exit;
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}
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open(PIDFILE, ">$opt_P") or die("Could not open PID file $opt_P: $!");
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print PIDFILE $$."\n";
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close PIDFILE;
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$server = new IO::Socket::INET (
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LocalPort => $opt_p,
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Proto => 'tcp',
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Listen => 5,
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Reuse => 1,
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Type => SOCK_STREAM,
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KeepAlive => 1,
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Blocking => 0
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) or die "error while creating socket: $!\n";
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Log 0, "created socket on ".$server->sockhost().":".$server->sockport();
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my $listener = IO::Select->new();
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$listener->add($server);
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my @new_handles;
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my %child_handles;
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my %child_config;
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my $thread_counter = 0;
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my $address;
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my $name;
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my $timeout;
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my $write_handle;
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my $server_pid;
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my @threads;
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my $sig_received = undef;
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$SIG{HUP} = sub { $sig_received = "SIGHUP"; };
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$SIG{INT} = sub { $sig_received = "SIGINT"; };
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$SIG{TERM} = sub { $sig_received = "SIGTERM"; };
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$SIG{KILL} = sub { $sig_received = "SIGKILL"; };
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$SIG{QUIT} = sub { $sig_received = "SIGQUIT"; };
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$SIG{ABRT} = sub { $sig_received = "SIGABRT"; };
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$SIG{PIPE} = sub { $sig_received = "SIGPIPE"; };
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$server_pid = $$ unless(defined($server_pid));
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while(1)
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{
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if($log_queue->pending)
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{
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Log 2, $log_queue->dequeue;
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}
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if(@new_handles = $listener->can_read(1))
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{
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foreach my $client (@new_handles)
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{
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if($client == $server)
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{
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$new_client = $server->accept();
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$listener->add($new_client);
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Log 1, "new connection from ".$new_client->peerhost().":".$new_client->peerport();
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}
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else
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{
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$buf = '';
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$buf = <$client>;
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if($buf)
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{
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$buf =~ s/(^\s*|\s*$)//g;
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if($buf =~ /^\s*([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}\s*\|\s*\d+\s*$/)
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{
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$client->send("command accepted\n");
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Log 2, "received new command from ".$client->peerhost().":".$client->peerport()." - $buf";
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($address, $timeout) = split("\\|", $buf);
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$address =~ s/\s*//g;
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$timeout =~ s/\s*//g;
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$write_handle = $client;
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if(defined($child_handles{$client}))
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{
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Log 2, "sending new command to thread ".$child_handles{$client}->tid()." for client ".$client->peerhost().":".$client->peerport();
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$queues{$child_handles{$client}->tid()}->enqueue("new|".$address."|".$timeout);
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}
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else
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{
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$thread_counter++;
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$queues{$thread_counter} = Thread::Queue->new();
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my $new_thread = threads->new(\&doQuery, ($write_handle, $address, $timeout));
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Log 2, "created thread ".$new_thread->tid()." for processing device $address within $timeout seconds for peer ".$client->peerhost().":".$client->peerport();
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$new_thread->detach();
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$child_handles{$client} = $new_thread;
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}
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}
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elsif(lc($buf) =~ /^\s*now\s*$/)
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{
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Log 2, "received now command from client ".$client->peerhost().":".$client->peerport();
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if(defined($child_handles{$client}))
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{
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Log 2, "signalling thread ".$child_handles{$client}->tid()." for an instant test for client ".$client->peerhost().":".$client->peerport();
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$queues{$child_handles{$client}->tid()}->enqueue("now");
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$client->send("command accepted\n");
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}
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else
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{
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$client->send("no command running\n");
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}
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}
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elsif(lc($buf) =~ /^\s*stop\s*$/)
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{
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Log 2, "received stop command from client ".$client->peerhost().":".$client->peerport();
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if(defined($child_handles{$client}))
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{
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Log 2, "sending thread ".$child_handles{$client}->tid()." the stop command for client ".$client->peerhost().":".$client->peerport();
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$queues{$child_handles{$client}->tid()}->enqueue("stop");
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$client->send("command accepted\n");
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delete($child_handles{$client});
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}
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else
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{
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$client->send("no command running\n");
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}
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}
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else
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{
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$client->send("command rejected\n");
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$queues{$child_handles{$client}->tid()}->enqueue("stop");
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Log 1, "received invalid command >>$buf<< from client ".$client->peerhost().":".$client->peerport();
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}
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}
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else
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{
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Log 1, "closed connection from ".$client->peerhost().":".$client->peerport();
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$listener->remove($client);
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if(defined($child_handles{$client}))
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{
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Log 2, "killing thread ".$child_handles{$client}->tid()." for client ".$client->peerhost();
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$queues{$child_handles{$client}->tid()}->enqueue("stop");
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delete($child_handles{$client});
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}
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shutdown($client, 2);
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close $client;
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$client = undef;
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Log 1, "closed successfully all threads";
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;
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}
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}
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}
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}
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if(defined($sig_received))
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{
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Log 0, "caught $sig_received";
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unlink($opt_P);
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Log 1, "removed PID-File $opt_P";
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Log 0, "exiting";
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exit;
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}
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}
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sub daemonize
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{
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use POSIX;
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POSIX::setsid or die "setsid $!";
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my $pid = fork();
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if($pid < 0)
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{
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die "fork: $!";
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}
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elsif($pid)
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{
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Log 0, "forked with PID $pid";
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exit 0;
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}
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chdir "/";
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umask 0;
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foreach (0 .. (POSIX::sysconf (&POSIX::_SC_OPEN_MAX) || 1024)) { POSIX::close $_ }
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open (STDIN, "</dev/null");
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open (STDOUT, ">/dev/null");
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open (STDERR, ">&STDOUT");
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}
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sub doQuery($$)
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{
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my ($write_handle, $address, $timeout) = @_;
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my $return;
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my $hcitool;
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my $nextrun = gettimeofday();
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my $cmd;
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my $run = 1;
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if($address and $timeout)
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{
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THREADLOOP: while($run)
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{
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if(exists($queues{threads->tid()}) and $queues{threads->tid()}->pending)
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{
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$cmd = $queues{threads->tid()}->dequeue;
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Log 2, threads->tid()."|received command: $cmd";
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if($cmd eq "now")
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{
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$log_queue->enqueue(threads->tid()."|performing an instant test");
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$nextrun = gettimeofday();
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}
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elsif($cmd eq "stop")
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{
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$log_queue->enqueue(threads->tid()."|shutting down thread");
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$run = 0;
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last THREADLOOP;
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}
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elsif($cmd =~ /^new\|/)
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{
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($cmd, $address, $timeout) = split("\\|", $cmd);
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$nextrun = gettimeofday();
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$log_queue->enqueue(threads->tid()."|new address: $address - new timeout $timeout");
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}
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}
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if($write_handle)
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{
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if($nextrun <= gettimeofday())
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{
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{
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lock($querylocker);
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if($querylocker gt (gettimeofday() - 2))
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{
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$log_queue->enqueue(threads->tid()."|waiting before hcitool command execution because last command was executed within the last 2 seconds");
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sleep rand(1) + 1;
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}
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$hcitool = qx(which hcitool);
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chomp $hcitool;
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if( -x "$hcitool")
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{
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$return = qx(hcitool name $address 2>/dev/null);
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}
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else
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{
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$write_handle->send("error\n") if(defined($write_handle));
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}
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$querylocker = gettimeofday();
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}
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chomp $return;
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if(not $return =~ /^\s*$/)
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{
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$write_handle->send("present;$return\n") if(defined($write_handle));
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}
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else
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{
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$write_handle->send("absence\n") if(defined($write_handle));
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}
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$nextrun = gettimeofday() + $timeout;
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}
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}
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sleep 1;
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}
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}
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delete($queues{threads->tid()}) if(exists($queues{threads->tid()}));
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}
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sub timestamp
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{
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return POSIX::strftime("%Y-%m-%d %H:%M:%S",localtime);
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}
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sub Log($$)
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{
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my ($loglevel, $message) = @_;
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my $thread = 0;
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if($message =~ /^\d+\|/)
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{
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($thread, $message) = split("\\|", $message);
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}
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if($loglevel <= $opt_v)
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{
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if($opt_l)
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{
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open(LOGFILE, ">>$opt_l") or die ("could not open logfile: $opt_l");
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}
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else
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{
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open (LOGFILE, ">&STDOUT") or die("cannot open STDOUT");
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}
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print LOGFILE "\r".timestamp()." - ".($opt_v >= 2 ? ($thread > 0 ? "(Thread $thread)" : "(Main Thread)")." - ":"").$message."\n";
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close(LOGFILE);
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}
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}
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