File: Pilot.pm

package info (click to toggle)
taktuk 3.7.7-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 3,356 kB
  • sloc: perl: 6,180; sh: 4,422; ansic: 1,073; makefile: 187
file content (742 lines) | stat: -rw-r--r-- 22,383 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
package TakTuk::Pilot;
use strict; use bytes;
use Carp;

use Exporter;

our $VERSION = "1.1";
our $RELEASE = sprintf "%d", q$Rev: 1 $ =~ /(\d+)/g;
our @ISA = qw(Exporter);

use constant EARGCM => 1;
use constant ETMOUT => 2;
use constant EARGCB => 3;
use constant ETKTRN => 4;
use constant ETKTNR => 5;
use constant ESPIPE => 6;
use constant ESFORK => 7;
use constant ESCLOS => 8;
use constant ESELEC => 9;
use constant ETPBUG => 10;
use constant EARGFH => 11;
use constant EARGTP => 12;

our @messages = (
    "Argument 'command' missing",
    "Timeouted",
    "Argument 'callback' missing",
    "TakTuk is already running",
    "TakTuk is not running",
    "pipe system call failed",
    "fork system call failed",
    "close system call failed",
    "select error",
    "Internal bug in TakTuk Pilot module",
    "Argument 'filehandle' missing",
    "Argument 'type' missing"
);

use TakTuk::Select;
use Data::Dumper;

our @taktuk_streams =
    ('taktuk', 'info', 'status', 'connector', 'default', 'state');
our $redirect_options = "-R taktuk='>&=1'";

our $has_setsid = eval("use POSIX 'setsid';1")?1:0;
our $read_granularity = 4096;
our $write_granularity = 4096;

# Internal functions
sub dummy_callback(%);
sub no_flush($);
sub taktuk_read_callback(%);
sub taktuk_write_callback(%);
sub set_callback($$$$);

# User interface
sub new();
sub error_msg($);
sub run(%);
sub continue();
sub create_session();
sub pid();
sub quiet();
sub verbose();
sub add_callback(%);
sub send_command($);
sub send_termination();
sub add_descriptor(%);
sub remove_descriptor(%);

sub create_session() {
    my $self = shift;

    if ($self->{running} and not $self->{setsid}) {
        return ETKTRN;
    } else {
        $self->{setsid} = 1;
        return 0;
    }
}

sub pid() {
    my $self = shift;

    if (!$self->{running}) {
        return ETKTNR;
    } else {
        return $self->{pid};
    }
}

sub quiet() {
    my $self = shift;

    if ($self->{running} and not $self->{quiet}) {
        return ETKTRN;
    } else {
        $self->{quiet} = 1;
        return 0;
    }
}

sub verbose() {
    my $self = shift;

    if ($self->{running} and $self->{quiet}) {
        return ETKTRN;
    } else {
        $self->{quiet} = 0;
        return 0;
    }
}

sub dummy_callback(%) {
    my %args = @_;

    print STDERR "WARNING: Unhandled TakTuk data on stream $args{stream}\n"
        unless $args{taktuk}->{quiet};
}

sub new() {
    my $self = shift;
    my $data = {};

    $data->{quit} = 0;
    $data->{option} = {};
    $data->{quiet} = 1;
    $data->{setsid} = 0;
    $data->{stream} = {};
    $data->{callback} = {};
    $data->{argument} = {};
    $data->{read} = {callback => {}, argument => {}};
    $data->{write} = {callback => {}, argument => {}};
    $data->{exception} = {callback => {}, argument => {}};
    $data->{running} = 0;
    $data->{read_buffer} = "";
    $data->{write_buffer} = "";
    $data->{read}->{select} = TakTuk::Select->new or die "Select creation\n";
    $data->{write}->{select} = TakTuk::Select->new or die "Select creation\n";
    $data->{exception}->{select} =
        TakTuk::Select->new or die "Select creation\n";

    return bless $data, $self;
}

sub error_msg($) {
    my $number = shift;

    if (($number < 1) or ($number > scalar(@messages))) {
        return "Unknown error";
    } else {
        return $messages[$number-1];
    }
}

sub run(%) {
    my $self = shift;
    my %arguments = @_;
    $self->{command} = $arguments{command};
    $self->{timeout} = $arguments{timeout};
    
    return EARGCM unless defined($self->{command});
    return ETKTRN if $self->{running};

    my ($command, $remaining) = split / /,$self->{command},2; 

    foreach my $stream (@taktuk_streams) {
        if (not exists($self->{option}->{$stream})) {
            if ($self->{quiet}) {
                $self->{option}->{$stream} = "-o $stream";
            } else {
                $self->add_callback(callback=>\&dummy_callback,
                                    stream=>$stream);
            }
        }
    }
    $command .= " ".$redirect_options;
    foreach my $stream (keys(%{$self->{option}})) {
        $command .= " ".$self->{option}->{$stream};
    }

    my ($taktuk_read, $taktuk_write);
    pipe($self->{read_channel}, $taktuk_write) or return ESPIPE;
    pipe($taktuk_read, $self->{write_channel}) or return ESPIPE;

    $self->{pid} = fork();
    return ESFORK unless defined($self->{pid});
    if ($self->{pid}) {
        close($taktuk_read) or return ESCLOS;
        close($taktuk_write) or return ESCLOS;
        binmode($self->{read_channel});
        no_flush($self->{write_channel});
    } else {
        setsid() if $self->{setsid} and $has_setsid;
        close($self->{read_channel}) or die "$!";
        close($self->{write_channel}) or die "$!";
        open(STDIN,"<&",$taktuk_read) or die "$!";
        open(STDOUT,">&",$taktuk_write) or die "$!";
        no_flush(\*STDOUT);
        close($taktuk_read) or die "$!";
        close($taktuk_write) or die "$!";
        exec("$command $remaining") or die "$!";
    }

    $self->add_descriptor(type=>'read', filehandle=>$self->{read_channel},
                          callback=>\&taktuk_read_callback);
    if (length($self->{write_buffer})) {
        $self->add_descriptor(type=>'write', filehandle=>$self->{write_channel},
                              callback=>\&taktuk_write_callback);
    } else {
        if ($self->{quit}) {
            $self->remove_descriptor(type=>'write',
                                     filehandle=>$self->{write_channel});
            close($self->{write_channel}) or return ESCLOS;
            delete $self->{write_channel};
        }
    }

    $self->{running} = 1;
    return $self->continue();
}

sub continue() {
    my $self = shift;

    return ETKTNR unless $self->{running};
    
    # Main processing loop
    while (scalar($self->{read}->{select}->handles())) {
        if (exists($self->{write_channel}) and $self->{quit}
                and not length($self->{write_buffer})) {
            $self->remove_descriptor(type=>'write',
                                     filehandle=>$self->{write_channel});
            close($self->{write_channel}) or return ESCLOS;
            delete($self->{write_channel});
        }
        my @select_result = TakTuk::Select::select($self->{read}->{select},
                        $self->{write}->{select}, $self->{exception}->{select},
                        $self->{timeout});
        if (scalar(@select_result)) {
            my @types = ('read', 'write', 'exception');
            my $rank = 0;
            $rank++ while $rank < 3 and not scalar(@{$select_result[$rank]});
            return ETMOUT if $rank == 3;
            while ($rank < 3) {
                my $type = $types[$rank];
                my $handle = shift @{$select_result[$rank]};
                my $callback = $self->{$type}->{callback}->{$handle};
                my $argument = $self->{$type}->{argument}->{$handle};

                return ETPBUG unless defined $callback;
                my %call_args = (taktuk=>$self,
                                 type=>$type,
                                 filehandle=>$handle,
                                 argument=>$argument);
                &$callback(%call_args);
                $rank++
                    while $rank < 3 and not scalar(@{$select_result[$rank]});
            }
        } else {
            return ESELEC;
        }
    }

    $self->{running} = 0;
    delete $self->{pid}; 

    $self->{write_buffer} = "";
    $self->{read_buffer} = "";
    close($self->{read_channel}) or return ESCLOS;
    if (exists($self->{write_channel})) {
        close($self->{write_channel}) or return ESCLOS;
    }
    return 0;
}

sub no_flush($) {
    my $new_fd = shift;
    my $old_fd=select($new_fd);
    $|=1;
    select($old_fd);
}

sub taktuk_read_callback(%) {
    my %args = @_;
    my $self = $args{taktuk};
    my $descriptor = $args{filehandle};
    my $done = 0;

    my $result = sysread($descriptor, $self->{read_buffer}, $read_granularity,
                                                length($self->{read_buffer}));
    carp "$!" unless defined $result;
    if (not $result) {
        $self->remove_descriptor(type=>'read', filehandle=>$descriptor);
        $done = 1;
    }

    while (not $done) {
        if (length($self->{read_buffer}) >= 4) {
            my ($size) = unpack("N", $self->{read_buffer});
            if (length($self->{read_buffer}) >= $size + 4) {
                my $buffer = substr $self->{read_buffer}, 4, $size;
                my ($stream, $data) = split / /, $buffer, 2;
                $self->{read_buffer} = substr $self->{read_buffer}, $size + 4;

                my $result = {};
                foreach my $field (@{$self->{stream}->{$stream}}) {
                    my $field_size = unpack("N", $data);
                    $result->{$field} = substr($data, 4, $field_size);
                    $data = substr $data, $field_size+4;
                }
                my %call_args = (taktuk=>$self,
                                 argument=>$self->{argument}->{$stream},
                                 stream=>$stream,
                                 fields=>$result);

                if (exists($self->{callback}->{$stream})) {
                    &{$self->{callback}->{$stream}}(%call_args);
                } elsif (exists($self->{callback}->{default})) {
                    &{$self->{callback}->{default}}(%call_args);
                } else {
                    carp "Internal bug in TakTuk::Pilot\n";
                }
            } else {
                $done = 1;
            }
        } else {
            $done = 1;
        }
    }
}

sub taktuk_write_callback(%) {
    my %args = @_;
    my $self = $args{taktuk};
    my $descriptor = $args{filehandle};
    my $size = length($self->{write_buffer});
    my $write_size = ($size > $write_granularity) ? $write_granularity : $size;

    my $result = syswrite($descriptor, $self->{write_buffer}, $write_size);
    carp "$!" unless defined($result);

    if ($result < $size) {
        $self->{write_buffer} = substr $self->{write_buffer}, $result;
    } else {
        $self->{write_buffer} = "";
        $self->remove_descriptor(type=>'write', filehandle=>$descriptor);
    }
}

sub set_callback($$$$) {
    my $self = shift;
    my $callback = shift;
    my $argument = shift;
    my $stream = shift;
    my $fields = shift;

    my $option = '-o '.$stream.'=\'$user_scalar="'.$stream.' "';
    foreach my $field (@$fields) {
        $option .= '.pack("N",length($'.$field.')).$'.$field;
    }
    $option .= ',pack("N",length($user_scalar)).$user_scalar\'';

    $self->{option}->{$stream} = $option;
    $self->{stream}->{$stream} = $fields;
    $self->{callback}->{$stream} = $callback;
    $self->{argument}->{$stream} = $argument;
}

sub add_callback(%) {
    my $self = shift;
    my %arguments = @_;
    my $callback = $arguments{callback};
    my $argument = $arguments{argument};
    my $stream = $arguments{stream};
    my $fields = $arguments{fields};

    return EARGCB unless defined($callback);
    $stream = 'default' unless defined($stream);
    $fields = [] unless defined($fields);

    if ($stream eq 'default') {
        foreach my $taktuk_stream (@taktuk_streams) {
            $self->set_callback($callback, $argument, $taktuk_stream, $fields)
                unless exists($self->{option}->{$taktuk_stream});
        }
    } else {
        $self->set_callback($callback, $argument, $stream, $fields);
    }
    return 0;
}

sub send_command($) {
    my $self = shift;
    my $command = shift;

    if (length($command)) {
        if (not length($self->{write_buffer}) and $self->{running}) {
            $self->add_descriptor(type=>'write',
                                  filehandle=>$self->{write_channel},
                                  callback=>\&taktuk_write_callback);
        }
        $self->{write_buffer} .= "$command\n";
    }
}

sub send_termination() {
    my $self = shift;

    $self->{quit} = 1;
}

sub add_descriptor(%) {
    my $self = shift;
    my %arguments = @_;
    my $type = $arguments{type};
    my $descriptor = $arguments{filehandle};
    my $callback = $arguments{callback};
    my $argument = $arguments{argument};

    return EARGCB unless defined $callback;
    return EARGFH unless defined $descriptor;
    return EARGTP unless defined $type;

    $self->{$type}->{callback}->{$descriptor} = $callback;
    $self->{$type}->{argument}->{$descriptor} = $argument;
    my $error = $self->{$type}->{select}->add($descriptor);
    return ESELEC if $error;
    return 0;
}

sub remove_descriptor(%) {
    my $self = shift;
    my %arguments = @_;
    my $type = $arguments{type};
    my $descriptor = $arguments{filehandle};

    return EARGFH unless defined $descriptor;
    return EARGTP unless defined $type;

    delete($self->{$type}->{callback}->{$descriptor});
    delete($self->{$type}->{argument}->{$descriptor});
    my $error = $self->{$type}->{select}->remove($descriptor);
    return ESELEC if $error;
    return 0;
}

1;
__END__

=pod TakTuk pilot Perl module

=begin html

<center><h1>USER MANUAL</h1></center>

=end html

=head1 NAME

TakTuk::Pilot - Perl module that ease C<taktuk(1)> execution and related I/O
management

=head1 SYNOPSIS

  use TakTuk::Pilot;
  
  our @line_counter;
  
  sub output_callback(%) {
      my %parameters = @_;
      my $field = $parameters{fields};
      my $rank = $field->{rank};
      my $argument = $parameters{argument};
  
      $argument->[$rank] = 1 unless defined($argument->[$rank]);
      print "$field->{host}-$rank : ".
            "$argument->[$rank] > $field->{line}\n";
      $argument->[$rank]++;
  }
  
  sub user_input_callback(%) {
      my %parameters = @_;
      my $taktuk = $parameters{taktuk};
      my $descriptor = $parameters{filehandle};
      my $buffer;
  
      my $result = sysread($descriptor, $buffer, 1024);
      warn "Read error $!" if not defined($result);
      # basic parsing, we assume input is buffered on a line basis
      chomp($buffer);
  
      if (length($buffer)) {
          print "Executing $buffer\n";
          $taktuk->send_command("broadcast exec [ $buffer ]");
      }
      if (not $result) {
          print "Terminating\n";
          $taktuk->remove_descriptor(type=>'read',
                                     filehandle=>$descriptor);
          $taktuk->send_termination();
      }
  }
  
  die "This script requires as arguments hostnames to contact\n"
      unless scalar(@ARGV);
  
  my $taktuk = TakTuk::Pilot->new();
  $taktuk->add_callback(callback=>\&output_callback, stream=>'output',
                        argument=>\@line_counter,
                        fields=>['host', 'rank', 'line']);
  $taktuk->add_descriptor(type=>'read', filehandle=>\*STDIN,
                          callback=>\&user_input_callback);
  $taktuk->run(command=>"taktuk -s -m ".join(" -m ", @ARGV));

=head1 DESCRIPTION

The TakTuk::Pilot Perl module ease the use of B<TakTuk> from within a Perl
program (see C<taktuk(1)> for a detailed description of B<TakTuk>). It
transparently manages I/O exchanges as well as B<TakTuk> data demultiplexing
and decoding.

=head1 CONSTRUCTOR

=over

=item B<new>B<()>

Creates a new B<TakTuk> object on which the following method can be called.

=back

=head1 METHODS

=over

=item B<add_callback(%)>

Adds a callback function associated to some B<TakTuk> output stream to the
calling B<TakTuk> object. This callback function will be called by
B<TakTuk::Pilot> for each batch of output data incoming from the related
stream. The hash passed as argument to this function call may contain the
following fields:

  callback => reference to the callback fonction (mandatory)
  stream   => stream related to this callback, might be
              'default' (mandatory)
  fields   => reference to an array of fields names relevant
              to the user
  argument => scalar that should be passed to each callback
              function call

The callback function should accept a hash as argument. This hash will be
populated with the following fields :

  taktuk   => reference to the taktuk object calling this
              callback
  argument => scalar given at callback addition or undef
  stream   => stream on which output data came
  fields   => reference to a hash containing a
              fieldname/value pair for each field requested
              upon callback addition

=item B<send_command($)>

Sends to the calling B<TakTuk> object the command passed as argument. Note that
if the B<TakTuk> object is not running, this command will be buffered and
executed upon run.

=item B<send_termination>B<()>

Sends to the calling B<TakTuk> object a termination command. As for
C<send_command>, if the B<TakTuk> object is not running, this command will be
issued upon run.

=item B<run(%)>

Runs B<TakTuk>, executing pending commands and waiting for B<TakTuk> output.
Note that this function is blocking: it waits for B<TakTuk> outputs, possibly
calls related callback functions and returns when B<TakTuk> terminates. Thus,
all B<TakTuk> commands should be given either before calling C<run> or within a
callback function.

This commands takes a hash as argument that may contain the following fields:

  command => TakTuk command line to be executed
  timeout => optional timeout on the wait for TakTuk output

Upon occurrence of the timeout (if one has been given), C<run> will returns an
C<ETMOUT> error code. Note the in this case B<TakTuk> execution will not be
terminated and should be resumed at some point by calling C<continue>.

=item B<continue>B<()>

Resumes a B<TakTuk> execution interrupted by timeout occurrence.

=item B<add_descriptor(%)>

Because the call to C<run> is blocking, waiting for B<TakTuk> output, it might
be interesting to let the C<TakTuk::Pilot> module monitor I/O occurrence related
to other file descriptors.
This is the intent of C<add_descriptor>. This function takes a hash as
parameter in which the following fields might be defined:

  type       => 'read', 'write' or 'exception', this is the
                type of I/O possibilities that should be
                monitored on the descriptor, as in select
                system call (mandatory).
  filehandle => file descriptor to monitor (mandatory).
  callback   => reference to the callback function that
                should be called when I/O is possible on the
                file descriptor.
  argument   => optional scalar value that will be passed
                with each call to the callback function

The callback function should also accept a hash as an argument in which the
following fields will be defined:

  taktuk     => reference to the TakTuk object from which
                the function was called.
  type       => type of I/O occurring (as in add_callback)
  filehandle => the related file descriptor. Notice that the
                user is in charge of performing the I/O
                operation itself (sysread or syswrite).
                Notice also that, because of the use of a
                select in TakTuk::Pilot, the use of buffered
                I/O on this descriptor is strongly discouraged
  argument   => the argument that was given to add_descriptor

=item B<remove_descriptor(%)>

Function that should be called to remove from the B<TakTuk> object a descriptor
previously added with C<add_descriptor>. It takes a hash as argument in which
the following fields may be defined:

  type       => type of I/O (see add_descriptor)
  filehandle => file descriptor to remove

=item B<quiet>B<() / verbose>B<()>

Change verbosity of C<TakTuk::Pilot> on STDOUT (default is quiet). Should not
be called when B<TakTuk> is running.

=item B<create_session>B<()>

Call C<setsid> in the B<TakTuk> process created by C<run>. The main purpose of
this call is to prevent B<TakTuk> from receiving signals sent to the process
group to which the pilot belong. Should not be called when B<TakTuk> is running.

=item B<pid>B<()>

Returns the pid of the process spawned to run B<TakTuk>.
Should only be called when B<TakTuk> is running.

=item B<error_msg($)>

Static function. Returns a character string that corresponds to the error code
given as argument. The error code should be one of the values returned by other
C<TakTuk::Pilot> functions (C<add_callback>, C<send_command>,
C<send_termination>, ...).

=back

=head1 ERRORS

When an error occur in one of these functions, it returns a non nul numeric
error code. This code can take one of the following values:

=over

=item B<TakTuk::Pilot::EARGCM>

Field 'command' is missing in a call to C<run>.

=item B<TakTuk::Pilot::EARGCB>

Field 'callback' is missing in a call to C<add_callback> or C<add_descriptor>.

=item B<TakTuk::Pilot::EARGFH>

Field 'filehandle' is missing in a call to C<add_descriptor> or
C<remove_descriptor>.

=item B<TakTuk::Pilot::EARGTP>

Field 'type' is missing in a call to C<add_descriptor> or
C<remove_descriptor>.

=item B<TakTuk::Pilot::ETMOUT>

A timeout occurred in a call to C<run>.

=item B<TakTuk::Pilot::ETKTRN>

B<TakTuk> is alredy running but C<run>, C<verbose> or C<quiet> has been called.

=item B<TakTuk::Pilot::ETKTNR>

B<TakTuk> is not running but C<continue> has been called.

=item B<TakTuk::Pilot::ESPIPE>

A call to C<pipe> failed in C<TakTuk::Pilot> (the error should be in $!).

=item B<TakTuk::Pilot::ESFORK>

A call to C<fork> failed in C<TakTuk::Pilot> (the error should be in $!).

=item B<TakTuk::Pilot::ESCLOS>

A call to C<close> failed in C<TakTuk::Pilot> (the error should be in $!).

=item B<TakTuk::Pilot::ESELEC>

A call to C<select> failed in C<TakTuk::Pilot> (the error should be in $!).

=item B<TakTuk::Pilot::ETPBUG>

Internal bug detected in C<TakTuk::Pilot>.

=back

=head1 SEE ALSO

C<tatkuk(1)>, C<taktukcomm(3)>, C<TakTuk(3)>

=head1 AUTHOR

The original concept of B<TakTuk> has been proposed by Cyrille Martin in his
PhD thesis. People involved in this work include Jacques Briat, Olivier
Richard, Thierry Gautier and Guillaume Huard.

The author of the version 3 (perl version) and current maintainer of the
package is Guillaume Huard.

=head1 COPYRIGHT

The C<TakTuk> communication interface library is provided under the terms
of the GNU General Public License version 2 or later.

=cut