+use File::Pid;
+
+=head1 NAME
+
+BackupPC_incPartsUpdate
+
+=head1 DESCRIPTION
+
+Create C<.tar.gz> increments on disk calling C<BackupPC_tarIncCreate>.
+
+Following options are supported (but all are optional):
+
+=over 4
+
+=item -h hostname
+
+Update parts for just single C<hostname>
+
+=item -c
+
+Force check for tar archives which exist on disk
+
+=item -d
+
+Turn debugging output
+
+=back
+
+=cut
+
+my %opt;
+getopts("cdh:", \%opt );
+
+my $debug = $opt{d};
+my $check = $opt{c} && print STDERR "NOTICE: tar archive check forced\n";
+
+my $pid_path = abs_path($0);
+$pid_path =~ s/\W+/_/g;
+
+my $pidfile = new File::Pid({
+ file => "/tmp/$pid_path",
+});
+
+if (my $pid = $pidfile->running ) {
+ die "$0 already running: $pid\n";
+} elsif ($pidfile->pid ne $$) {
+ $pidfile->remove;
+ $pidfile = new File::Pid;
+}
+
+print STDERR "$0 using pid ",$pidfile->pid," file ",$pidfile->file,"\n";
+$pidfile->write;