perl/DXCommandmode.pm

   1 #!/usr/bin/perl
   2 #
   3 # This module impliments the user facing command mode for a dx cluster
   4 #
   5 # Copyright (c) 1998 Dirk Koopman G1TLH
   6 #
   7 #
   8 #
   9
  10 package DXCommandmode;
  11
  12 #use POSIX;
  13
  14 @ISA = qw(DXChannel);
  15
  16 require 5.10.1;
  17
  18 use POSIX qw(:math_h);
  19 use DXUtil;
  20 use DXChannel;
  21 use DXUser;
  22 use DXVars;
  23 use DXDebug;
  24 use DXM;
  25 use DXLog;
  26 use DXLogPrint;
  27 use DXBearing;
  28 use CmdAlias;
  29 use Filter;
  30 use Minimuf;
  31 use DXDb;
  32 use AnnTalk;
  33 use WCY;
  34 use Sun;
  35 use Internet;
  36 use Script;
  37 use QSL;
  38 use DB_File;
  39 use VE7CC;
  40 use DXXml;
  41 use AsyncMsg;
  42 use JSON;
  43 use Time::HiRes qw(gettimeofday tv_interval);
  44
  45 use Mojo::IOLoop;
  46 use Mojo::IOLoop::Subprocess;
  47 use Mojo::UserAgent;
  48
  49 use strict;
  50 use vars qw(%Cache %cmd_cache $errstr %aliases $scriptbase %nothereslug
  51         $maxbadcount $msgpolltime $default_pagelth $cmdimportdir $users $maxusers);
  52
  53 %Cache = ();                                    # cache of dynamically loaded routine's mod times
  54 %cmd_cache = ();                                # cache of short names
  55 $errstr = ();                                   # error string from eval
  56 %aliases = ();                                  # aliases for (parts of) commands
  57 $scriptbase = "$main::root/scripts"; # the place where all users start scripts go
  58 $maxbadcount = 3;                               # no of bad words allowed before disconnection
  59 $msgpolltime = 3600;                    # the time between polls for new messages
  60 $cmdimportdir = "$main::root/cmd_import"; # the base directory for importing command scripts
  61                                           # this does not exist as default, you need to create it manually
  62 $users = 0;                                       # no of users on this node currently
  63 $maxusers = 0;                            # max no users on this node for this run
  64
  65 #
  66 # obtain a new connection this is derived from dxchannel
  67 #
  68
  69 sub new
  70 {
  71         my $self = DXChannel::alloc(@_);
  72
  73         # routing, this must go out here to prevent race condx
  74         my $pkg = shift;
  75         my $call = shift;
  76 #       my @rout = $main::routeroot->add_user($call, Route::here(1));
  77         DXProt::_add_thingy($main::routeroot, [$call, 0, 0, 1, undef, undef, $self->hostname], );
  78
  79         # ALWAYS output the user
  80         my $ref = Route::User::get($call);
  81         if ($ref) {
  82                 $main::me->route_pc16($main::mycall, undef, $main::routeroot, $ref);
  83                 $main::me->route_pc92a($main::mycall, undef, $main::routeroot, $ref) unless $DXProt::pc92_slug_changes;
  84         }
  85
  86         return $self;
  87 }
  88
  89 # this is how a a connection starts, you get a hello message and the motd with
  90 # possibly some other messages asking you to set various things up if you are
  91 # new (or nearly new and slacking) user.
  92
  93 sub start
  94 {
  95         my ($self, $line, $sort) = @_;
  96         my $user = $self->{user};
  97         my $call = $self->{call};
  98         my $name = $user->{name};
  99
 100         # log it
 101         my $host = $self->{conn}->peerhost;
 102         $host ||= "AGW Port #$self->{conn}->{agwport}" if exists $self->{conn}->{agwport};
 103         $host ||= "unknown";
 104         $self->{hostname} = $host;
 105
 106         $self->{name} = $name ? $name : $call;
 107         $self->send($self->msg('l2',$self->{name}));
 108         $self->state('prompt');         # a bit of room for further expansion, passwords etc
 109         $self->{priv} = $user->priv || 0;
 110         $self->{lang} = $user->lang || $main::lang || 'en';
 111         my $pagelth = $user->pagelth;
 112         $pagelth = $default_pagelth unless defined $pagelth;
 113         $self->{pagelth} = $pagelth;
 114         ($self->{width}) = $line =~ /width=(\d+)/; $line =~ s/\s*width=\d+\s*//;
 115         if ($line =~ /host=/) {
 116                 my ($h) = $line =~ /host=(\d+\.\d+\.\d+\.\d+)/;
 117                 $line =~ s/\s*host=\d+\.\d+\.\d+\.\d+// if $h;
 118                 unless ($h) {
 119                         ($h) = $line =~ /host=([\da..fA..F:]+)/;
 120                         $line =~ s/\s*host=[\da..fA..F:]+// if $h;
 121                 }
 122                 $self->{hostname} = $h if $h;
 123         }
 124         $self->{width} = 80 unless $self->{width} && $self->{width} > 80;
 125         $self->{consort} = $line;       # save the connection type
 126
 127         LogDbg('DXCommand', "$call connected from $self->{hostname}");
 128
 129         # set some necessary flags on the user if they are connecting
 130         $self->{beep} = $user->wantbeep;
 131         $self->{ann} = $user->wantann;
 132         $self->{wwv} = $user->wantwwv;
 133         $self->{wcy} = $user->wantwcy;
 134         $self->{talk} = $user->wanttalk;
 135         $self->{wx} = $user->wantwx;
 136         $self->{dx} = $user->wantdx;
 137         $self->{logininfo} = $user->wantlogininfo;
 138         $self->{ann_talk} = $user->wantann_talk;
 139         $self->{here} = 1;
 140         $self->{prompt} = $user->prompt if $user->prompt;
 141         $self->{lastmsgpoll} = 0;
 142
 143         # sort out new dx spot stuff
 144         $user->wantdxcq(0) unless defined $user->{wantdxcq};
 145         $user->wantdxitu(0) unless defined $user->{wantdxitu};
 146         $user->wantusstate(0) unless defined $user->{wantusstate};
 147
 148         # sort out registration
 149         if ($main::reqreg == 1) {
 150                 $self->{registered} = $user->registered;
 151         } elsif ($main::reqreg == 2) {
 152                 $self->{registered} = !$user->registered;
 153         } else {
 154                 $self->{registered} = 1;
 155         }
 156
 157         # send the relevant MOTD
 158         $self->send_motd;
 159
 160         # sort out privilege reduction
 161         $self->{priv} = 0 unless $self->{hostname} eq '127.0.0.1' || $self->{hostname} eq '::1' || $self->conn->{usedpasswd};
 162
 163         # get the filters
 164         my $nossid = $call;
 165         $nossid =~ s/-\d+$//;
 166
 167         $self->{spotsfilter} = Filter::read_in('spots', $call, 0)
 168                 || Filter::read_in('spots', $nossid, 0)
 169                         || Filter::read_in('spots', 'user_default', 0);
 170         $self->{wwvfilter} = Filter::read_in('wwv', $call, 0)
 171                 || Filter::read_in('wwv', $nossid, 0)
 172                         || Filter::read_in('wwv', 'user_default', 0);
 173         $self->{wcyfilter} = Filter::read_in('wcy', $call, 0)
 174                 || Filter::read_in('wcy', $nossid, 0)
 175                         || Filter::read_in('wcy', 'user_default', 0);
 176         $self->{annfilter} = Filter::read_in('ann', $call, 0)
 177                 || Filter::read_in('ann', $nossid, 0)
 178                         || Filter::read_in('ann', 'user_default', 0) ;
 179
 180         # clean up qra locators
 181         my $qra = $user->qra;
 182         $qra = undef if ($qra && !DXBearing::is_qra($qra));
 183         unless ($qra) {
 184                 my $lat = $user->lat;
 185                 my $long = $user->long;
 186                 $user->qra(DXBearing::lltoqra($lat, $long)) if (defined $lat && defined $long);
 187         }
 188
 189         # decide on echo
 190         my $echo = $user->wantecho;
 191         unless ($echo) {
 192                 $self->send_now('E', "0");
 193                 $self->send($self->msg('echow'));
 194                 $self->conn->echo($echo) if $self->conn->can('echo');
 195         }
 196
 197         $self->tell_login('loginu');
 198         $self->tell_buddies('loginb');
 199
 200         # do we need to send a forward/opernam?
 201         my $lastoper = $user->lastoper || 0;
 202         my $homenode = $user->homenode || "";
 203         if ($homenode eq $main::mycall && $main::systime >= $lastoper + $DXUser::lastoperinterval) {
 204                 run_cmd($main::me, "forward/opernam $call");
 205                 $user->lastoper($main::systime + ((int rand(10)) * 86400));
 206         }
 207
 208         # run a script send the output to the punter
 209         my $script = new Script(lc $call) || new Script('user_default');
 210         $script->run($self) if $script;
 211
 212         # send cluster info
 213         $self->send($self->run_cmd("show/cluster"));
 214
 215         # send prompts for qth, name and things
 216         $self->send($self->msg('namee1')) if !$user->name;
 217         $self->send($self->msg('qthe1')) if !$user->qth;
 218         $self->send($self->msg('qll')) if !$user->qra || (!$user->lat && !$user->long);
 219         $self->send($self->msg('hnodee1')) if !$user->qth;
 220         $self->send($self->msg('m9')) if DXMsg::for_me($call);
 221
 222         # send out any buddy messages for other people that are online
 223         foreach my $call (@{$user->buddies}) {
 224                 my $ref = Route::User::get($call);
 225                 if ($ref) {
 226                         foreach my $node ($ref->parents) {
 227                                 $self->send($self->msg($node eq $main::mycall ? 'loginb' : 'loginbn', $call, $node));
 228                         }
 229                 }
 230         }
 231
 232         $self->lastmsgpoll($main::systime);
 233         $self->prompt;
 234 }
 235
 236 #
 237 # This is the normal command prompt driver
 238 #
 239
 240 sub normal
 241 {
 242         my $self = shift;
 243         my $cmdline = shift;
 244         my @ans;
 245
 246         # save this for them's that need it
 247         my $rawline = $cmdline;
 248
 249         # remove leading and trailing spaces
 250         $cmdline =~ s/^\s*(.*)\s*$/$1/;
 251
 252         if ($self->{state} eq 'page') {
 253                 my $i = $self->{pagelth};
 254                 my $ref = $self->{pagedata};
 255                 my $tot = @$ref;
 256
 257                 # abort if we get a line starting in with a
 258                 if ($cmdline =~ /^a/io) {
 259                         undef $ref;
 260                         $i = 0;
 261                 }
 262
 263                 # send a tranche of data
 264                 while ($i-- > 0 && @$ref) {
 265                         my $line = shift @$ref;
 266                         $line =~ s/\s+$//o;     # why am having to do this?
 267                         $self->send($line);
 268                 }
 269
 270                 # reset state if none or else chuck out an intermediate prompt
 271                 if ($ref && @$ref) {
 272                         $tot -= $self->{pagelth};
 273                         $self->send($self->msg('page', $tot));
 274                 } else {
 275                         $self->state('prompt');
 276                 }
 277         } elsif ($self->{state} eq 'sysop') {
 278                 my $passwd = $self->{user}->passwd;
 279                 if ($passwd) {
 280                         my @pw = grep {$_ !~ /\s/} split //, $passwd;
 281                         my @l = @{$self->{passwd}};
 282                         my $str = "$pw[$l[0]].*$pw[$l[1]].*$pw[$l[2]].*$pw[$l[3]].*$pw[$l[4]]";
 283                         if ($cmdline =~ /$str/) {
 284                                 $self->{priv} = $self->{user}->priv;
 285                         } else {
 286                                 $self->send($self->msg('sorry'));
 287                         }
 288                 } else {
 289                         $self->send($self->msg('sorry'));
 290                 }
 291                 $self->state('prompt');
 292         } elsif ($self->{state} eq 'passwd') {
 293                 my $passwd = $self->{user}->passwd;
 294                 if ($passwd && $cmdline eq $passwd) {
 295                         $self->send($self->msg('pw1'));
 296                         $self->state('passwd1');
 297                 } else {
 298                         $self->conn->{echo} = $self->conn->{decho};
 299                         delete $self->conn->{decho};
 300                         $self->send($self->msg('sorry'));
 301                         $self->state('prompt');
 302                 }
 303         } elsif ($self->{state} eq 'passwd1') {
 304                 $self->{passwd} = $cmdline;
 305                 $self->send($self->msg('pw2'));
 306                 $self->state('passwd2');
 307         } elsif ($self->{state} eq 'passwd2') {
 308                 if ($cmdline eq $self->{passwd}) {
 309                         $self->{user}->passwd($cmdline);
 310                         $self->send($self->msg('pw3'));
 311                 } else {
 312                         $self->send($self->msg('pw4'));
 313                 }
 314                 $self->conn->{echo} = $self->conn->{decho};
 315                 delete $self->conn->{decho};
 316                 $self->state('prompt');
 317         } elsif ($self->{state} eq 'talk' || $self->{state} eq 'chat') {
 318                 if ($cmdline =~ m{^(?:/EX|/ABORT)}i) {
 319                         for (@{$self->{talklist}}) {
 320                                 if ($self->{state} eq 'talk') {
 321                                         $self->send_talks($_,  $self->msg('talkend'));
 322                                 } else {
 323                                         $self->local_send('C', $self->msg('chatend', $_));
 324                                 }
 325                         }
 326                         $self->state('prompt');
 327                         delete $self->{talklist};
 328                 } elsif ($cmdline =~ m|^/+\w+|) {
 329                         $cmdline =~ s|^/||;
 330                         my $sendit = $cmdline =~ s|^/+||;
 331                         my @in = $self->run_cmd($cmdline);
 332                         $self->send_ans(@in);
 333                         if ($sendit && $self->{talklist} && @{$self->{talklist}}) {
 334                                 foreach my $l (@in) {
 335                                         my @bad;
 336                                         if (@bad = BadWords::check($l)) {
 337                                                 $self->badcount(($self->badcount||0) + @bad);
 338                                                 LogDbg('DXCommand', "$self->{call} swore: $l with words:" . join(',', @bad) . ")");
 339                                         } else {
 340                                                 for (@{$self->{talklist}}) {
 341                                                         if ($self->{state} eq 'talk') {
 342                                                                 $self->send_talks($_, $l);
 343                                                         } else {
 344                                                                 send_chats($self, $_, $l)
 345                                                         }
 346                                                 }
 347                                         }
 348                                 }
 349                         }
 350                         $self->send($self->{state} eq 'talk' ? $self->talk_prompt : $self->chat_prompt);
 351                 } elsif ($self->{talklist} && @{$self->{talklist}}) {
 352                         # send what has been said to whoever is in this person's talk list
 353                         my @bad;
 354                         if (@bad = BadWords::check($cmdline)) {
 355                                 $self->badcount(($self->badcount||0) + @bad);
 356                                 LogDbg('DXCommand', "$self->{call} swore: $cmdline with words:" . join(',', @bad) . ")");
 357                         } else {
 358                                 for (@{$self->{talklist}}) {
 359                                         if ($self->{state} eq 'talk') {
 360                                                 $self->send_talks($_, $rawline);
 361                                         } else {
 362                                                 send_chats($self, $_, $rawline);
 363                                         }
 364                                 }
 365                         }
 366                         $self->send($self->talk_prompt) if $self->{state} eq 'talk';
 367                         $self->send($self->chat_prompt) if $self->{state} eq 'chat';
 368                 } else {
 369                         # for safety
 370                         $self->state('prompt');
 371                 }
 372         } elsif (my $func = $self->{func}) {
 373                 no strict 'refs';
 374                 my @ans;
 375                 if (ref $self->{edit}) {
 376                         eval { @ans = $self->{edit}->$func($self, $rawline)};
 377                 } else {
 378                         eval {  @ans = &{$self->{func}}($self, $rawline) };
 379                 }
 380                 if ($@) {
 381                         $self->send_ans("Syserr: on stored func $self->{func}", $@);
 382                         delete $self->{func};
 383                         $self->state('prompt');
 384                         undef $@;
 385                 }
 386                 $self->send_ans(@ans);
 387         } else {
 388                 $self->send_ans(run_cmd($self, $cmdline));
 389         }
 390
 391         # check for excessive swearing
 392         if ($self->{badcount} && $self->{badcount} >= $maxbadcount) {
 393                 LogDbg('DXCommand', "$self->{call} logged out for excessive swearing");
 394                 $self->disconnect;
 395                 return;
 396         }
 397
 398         # send a prompt only if we are in a prompt state
 399         $self->prompt() if $self->{state} =~ /^prompt/o;
 400 }
 401
 402 # send out the talk messages taking into account vias and connectivity
 403 sub send_talks
 404 {
 405         my ($self, $ent, $line) = @_;
 406
 407         my ($to, $via) = $ent =~ /(\S+)>(\S+)/;
 408         $to = $ent unless $to;
 409         my $call = $via && $via ne '*' ? $via : $to;
 410         my $clref = Route::get($call);
 411         my $dxchan = $clref->dxchan if $clref;
 412         if ($dxchan) {
 413                 $dxchan->talk($self->{call}, $to, undef, $line);
 414         } else {
 415                 $self->send($self->msg('disc2', $via ? $via : $to));
 416                 my @l = grep { $_ ne $ent } @{$self->{talklist}};
 417                 if (@l) {
 418                         $self->{talklist} = \@l;
 419                 } else {
 420                         delete $self->{talklist};
 421                         $self->state('prompt');
 422                 }
 423         }
 424 }
 425
 426 sub send_chats
 427 {
 428         my $self = shift;
 429         my $target = shift;
 430         my $text = shift;
 431
 432         my $msgid = DXProt::nextchatmsgid();
 433         $text = "#$msgid $text";
 434         $main::me->normal(DXProt::pc93($target, $self->{call}, undef, $text));
 435 }
 436
 437 sub special_prompt
 438 {
 439         my $self = shift;
 440         my $prompt = shift;
 441         my @call;
 442         for (@{$self->{talklist}}) {
 443                 my ($to, $via) = /(\S+)>(\S+)/;
 444                 $to = $_ unless $to;
 445                 push @call, $to;
 446         }
 447         return $self->msg($prompt, join(',', @call));
 448 }
 449
 450 sub talk_prompt
 451 {
 452         my $self = shift;
 453         return $self->special_prompt('talkprompt');
 454 }
 455
 456 sub chat_prompt
 457 {
 458         my $self = shift;
 459         return $self->special_prompt('chatprompt');
 460 }
 461
 462 #
 463 # send a load of stuff to a command user with page prompting
 464 # and stuff
 465 #
 466
 467 sub send_ans
 468 {
 469         my $self = shift;
 470
 471         if ($self->{pagelth} && @_ > $self->{pagelth}) {
 472                 my $i;
 473                 for ($i = $self->{pagelth}; $i-- > 0; ) {
 474                         my $line = shift @_;
 475                         $line =~ s/\s+$//o;     # why am having to do this?
 476                         $self->send($line);
 477                 }
 478                 $self->{pagedata} =  [ @_ ];
 479                 $self->state('page');
 480                 $self->send($self->msg('page', scalar @_));
 481         } else {
 482                 for (@_) {
 483                         if (defined $_) {
 484                                 $self->send($_);
 485                         } else {
 486                                 $self->send('');
 487                         }
 488                 }
 489         }
 490 }
 491
 492 #
 493 # this is the thing that preps for running the command, it is done like this for the
 494 # benefit of remote command execution
 495 #
 496
 497 sub run_cmd
 498 {
 499         my $self = shift;
 500         my $user = $self->{user};
 501         my $call = $self->{call};
 502         my $cmdline = shift;
 503         my @ans;
 504
 505         return () if length $cmdline == 0;
 506
 507         # split the command line up into parts, the first part is the command
 508         my ($cmd, $args) = split /\s+/, $cmdline, 2;
 509         $args = "" unless defined $args;
 510
 511         if ($cmd) {
 512
 513                 # check cmd
 514                 if ($cmd =~ m|^/| || $cmd =~ m|[^-?\w/]|) {
 515                         LogDbg('DXCommand', "cmd: invalid characters in '$cmd'");
 516                         return $self->_error_out('e1');
 517                 }
 518
 519                 # strip out // on command only
 520                 $cmd =~ s|//|/|g;
 521
 522                 my ($path, $fcmd);
 523
 524                 dbg("cmd: $cmd") if isdbg('command');
 525
 526                 # alias it if possible
 527                 my $acmd = CmdAlias::get_cmd($cmd);
 528                 if ($acmd) {
 529                         ($cmd, $args) = split /\s+/, "$acmd $args", 2;
 530                         $args = "" unless defined $args;
 531                         dbg("cmd: aliased $cmd $args") if isdbg('command');
 532                 }
 533
 534                 # first expand out the entry to a command
 535                 ($path, $fcmd) = search($main::localcmd, $cmd, "pl");
 536                 ($path, $fcmd) = search($main::cmd, $cmd, "pl") unless $path && $fcmd;
 537
 538                 if ($path && $cmd) {
 539                         dbg("cmd: path $cmd cmd: $fcmd") if isdbg('command');
 540
 541                         my $package = find_cmd_name($path, $fcmd);
 542                         return ($@) if $@;
 543
 544                         if ($package && $self->can("${package}::handle")) {
 545                                 no strict 'refs';
 546                                 dbg("cmd: package $package") if isdbg('command');
 547                                 if (isdbg('progress')) {
 548                                         my $s = "CMD: '$cmd' by $call ip $self->{hostname}";
 549                                 }
 550                                 my $t0 = [gettimeofday];
 551                                 eval { @ans = &{"${package}::handle"}($self, $args) };
 552                                 if ($@) {
 553                                         dbgprintring(25);
 554                                         return (DXDebug::shortmess($@));
 555                                 }
 556                                 if (isdbg('progress')) {
 557                                         my $msecs = _diffms($t0);
 558                                         my $s = "CMD: '$cmd $args' by $call ip: $self->{hostname} ${msecs}mS";
 559                                         dbg($s);
 560                                 }
 561                         } else {
 562                                 dbg("cmd: $package not present") if isdbg('command');
 563                                 return $self->_error_out('e1');
 564                         }
 565                 } else {
 566                         dbg("cmd: $cmd not found") if isdbg('command');
 567                         return $self->_error_out('e1');
 568                 }
 569         }
 570
 571         my $ok = shift @ans;
 572         if ($ok) {
 573                 delete $self->{errors};
 574         } else {
 575                 if (++$self->{errors} > $DXChannel::maxerrors) {
 576                         $self->send($self->msg('e26'));
 577                         $self->disconnect;
 578                         return ();
 579                 }
 580         }
 581         return map {s/([^\s])\s+$/$1/; $_} @ans;
 582 }
 583
 584 #
 585 # This is called from inside the main cluster processing loop and is used
 586 # for despatching commands that are doing some long processing job
 587 #
 588 sub process
 589 {
 590         my $t = time;
 591         my @dxchan = DXChannel::get_all();
 592         my $dxchan;
 593
 594         $users = 0;
 595         foreach $dxchan (@dxchan) {
 596                 next unless $dxchan->is_user;
 597
 598                 # send a outstanding message prompt if required
 599                 if ($t >= $dxchan->lastmsgpoll + $msgpolltime) {
 600                         $dxchan->send($dxchan->msg('m9')) if DXMsg::for_me($dxchan->call);
 601                         $dxchan->lastmsgpoll($t);
 602                 }
 603
 604                 # send a prompt if no activity out on this channel
 605                 if ($t >= $dxchan->t + $main::user_interval) {
 606                         $dxchan->prompt() if $dxchan->{state} =~ /^prompt/o;
 607                         $dxchan->t($t);
 608                 }
 609                 ++$users;
 610                 $maxusers = $users if $users > $maxusers;
 611         }
 612
 613         while (my ($k, $v) = each %nothereslug) {
 614                 if ($main::systime >= $v + 300) {
 615                         delete $nothereslug{$k};
 616                 }
 617         }
 618
 619         import_cmd();
 620 }
 621
 622 #
 623 # finish up a user context
 624 #
 625 sub disconnect
 626 {
 627         my $self = shift;
 628         my $call = $self->call;
 629
 630         return if $self->{disconnecting}++;
 631
 632         delete $self->{senddbg};
 633
 634         my $uref = Route::User::get($call);
 635         my @rout;
 636         if ($uref) {
 637 #               @rout = $main::routeroot->del_user($uref);
 638                 @rout = DXProt::_del_thingy($main::routeroot, [$call, 0]);
 639
 640                 dbg("B/C PC17 on $main::mycall for: $call") if isdbg('route');
 641
 642                 # issue a pc17 to everybody interested
 643                 $main::me->route_pc17($main::mycall, undef, $main::routeroot, $uref);
 644                 $main::me->route_pc92d($main::mycall, undef, $main::routeroot, $uref) unless $DXProt::pc92_slug_changes;
 645         } else {
 646                 confess "trying to disconnect a non existant user $call";
 647         }
 648
 649         # I was the last node visited
 650     $self->user->node($main::mycall);
 651
 652         # send info to all logged in thingies
 653         $self->tell_login('logoutu');
 654         $self->tell_buddies('logoutb');
 655
 656         LogDbg('DXCommand', "$call disconnected");
 657
 658         $self->SUPER::disconnect;
 659 }
 660
 661 #
 662 # short cut to output a prompt
 663 #
 664
 665 sub prompt
 666 {
 667         my $self = shift;
 668
 669         return if $self->{gtk};         # 'cos prompts are not a concept that applies here
 670
 671         my $call = $self->call;
 672         my $date = cldate($main::systime);
 673         my $time = ztime($main::systime);
 674         my $prompt = $self->{prompt} || $self->msg('pr');
 675
 676         $call = "($call)" unless $self->here;
 677         $prompt =~ s/\%C/$call/g;
 678         $prompt =~ s/\%D/$date/g;
 679         $prompt =~ s/\%T/$time/g;
 680         $prompt =~ s/\%M/$main::mycall/g;
 681
 682         $self->send($prompt);
 683 }
 684
 685 # broadcast a message to all users [except those mentioned after buffer]
 686 sub broadcast
 687 {
 688         my $pkg = shift;                        # ignored
 689         my $s = shift;                          # the line to be rebroadcast
 690
 691     foreach my $dxchan (DXChannel::get_all()) {
 692                 next unless $dxchan->is_user; # only interested in user channels
 693                 next if grep $dxchan == $_, @_;
 694                 $dxchan->send($s);                      # send it
 695         }
 696 }
 697
 698 # gimme all the users
 699 sub get_all
 700 {
 701         goto &DXChannel::get_all_users;
 702 }
 703
 704 # run a script for this user
 705 sub run_script
 706 {
 707         my $self = shift;
 708         my $silent = shift || 0;
 709
 710 }
 711
 712 #
 713 # search for the command in the cache of short->long form commands
 714 #
 715
 716 sub search
 717 {
 718         my ($path, $short_cmd, $suffix) = @_;
 719         my ($apath, $acmd);
 720
 721         # commands are lower case
 722         $short_cmd = lc $short_cmd;
 723         dbg("command: $path $short_cmd\n") if isdbg('command');
 724
 725         # do some checking for funny characters
 726         return () if $short_cmd =~ /\/$/;
 727
 728         # return immediately if we have it
 729         ($apath, $acmd) = split ',', $cmd_cache{$short_cmd} if $cmd_cache{$short_cmd};
 730         if ($apath && $acmd) {
 731                 dbg("cached $short_cmd = ($apath, $acmd)\n") if isdbg('command');
 732                 return ($apath, $acmd);
 733         }
 734
 735         # if not guess
 736         my @parts = split '/', $short_cmd;
 737         my $dirfn;
 738         my $curdir = $path;
 739
 740         while (my $p = shift @parts) {
 741                 opendir(D, $curdir) or confess "can't open $curdir $!";
 742                 my @ls = readdir D;
 743                 closedir D;
 744
 745                 # if this isn't the last part
 746                 if (@parts) {
 747                         my $found;
 748                         foreach my $l (sort @ls) {
 749                                 next if $l =~ /^\./;
 750                                 if ((-d "$curdir/$l") && $p eq substr($l, 0, length $p)) {
 751                                         dbg("got dir: $curdir/$l\n") if isdbg('command');
 752                                         $dirfn .= "$l/";
 753                                         $curdir .= "/$l";
 754                                         $found++;
 755                                         last;
 756                                 }
 757                         }
 758                         # only proceed if we find the directory asked for
 759                         return () unless $found;
 760                 } else {
 761                         foreach my $l (sort @ls) {
 762                                 next if $l =~ /^\./;
 763                                 next unless $l =~ /\.$suffix$/;
 764                                 if ($p eq substr($l, 0, length $p)) {
 765                                         $l =~ s/\.$suffix$//;
 766                                         $dirfn = "" unless $dirfn;
 767                                         $cmd_cache{$short_cmd} = join(',', ($path, "$dirfn$l")); # cache it
 768                                         dbg("got path: $path cmd: $dirfn$l\n") if isdbg('command');
 769                                         return ($path, "$dirfn$l");
 770                                 }
 771                         }
 772                 }
 773         }
 774
 775         return ();
 776 }
 777
 778 # clear the command name cache
 779 sub clear_cmd_cache
 780 {
 781         no strict 'refs';
 782
 783         for my $k (keys %Cache) {
 784                 unless ($k =~ /cmd_cache/) {
 785                         dbg("Undefining cmd $k") if isdbg('command');
 786                         undef $DXCommandmode::{"${k}::"};
 787                 }
 788         }
 789         %cmd_cache = ();
 790         %Cache = ( cmd_clear_cmd_cache  => $Cache{cmd_clear_cmd_cache} );
 791 }
 792
 793 #
 794 # the persistant execution of things from the command directories
 795 #
 796 #
 797 # This allows perl programs to call functions dynamically
 798 #
 799 # This has been nicked directly from the perlembed pages
 800 #
 801 #require Devel::Symdump;
 802
 803 sub valid_package_name {
 804         my $string = shift;
 805         $string =~ s|([^A-Za-z0-9_/])|sprintf("_%2x",unpack("C",$1))|eg;
 806
 807         $string =~ s|/|_|g;
 808         return "cmd_$string";
 809 }
 810
 811 #
 812 # this bit of magic finds a command in the offered directory
 813 sub find_cmd_name {
 814         my $path = shift;
 815         my $cmdname = shift;
 816         my $package = valid_package_name($cmdname);
 817         my $filename = "$path/$cmdname.pl";
 818         my $mtime = -M $filename;
 819
 820         # return if we can't find it
 821         $errstr = undef;
 822         unless (defined $mtime) {
 823                 $errstr = DXM::msg('e1');
 824                 return undef;
 825         }
 826
 827         if(exists $Cache{$package} && exists $Cache{$package}->{mtime} && $Cache{$package}->{mtime} <= $mtime) {
 828                 #we have compiled this subroutine already,
 829                 #it has not been updated on disk, nothing left to do
 830                 #print STDERR "already compiled $package->handler\n";
 831                 dbg("find_cmd_name: $package cached") if isdbg('command');
 832         } else {
 833
 834                 my $sub = readfilestr($filename);
 835                 unless ($sub) {
 836                         $errstr = "Syserr: can't open '$filename' $!";
 837                         return undef;
 838                 };
 839
 840                 #wrap the code into a subroutine inside our unique package
 841                 my $eval = qq(package DXCommandmode::$package; use POSIX qw{:math_h}; use DXLog; use DXDebug; use DXUser; use DXUtil; our \@ISA = qw{DXCommandmode}; );
 842
 843
 844                 if ($sub =~ m|\s*sub\s+handle\n|) {
 845                         $eval .= $sub;
 846                 } else {
 847                         $eval .= qq(sub handle { $sub });
 848                 }
 849
 850                 if (isdbg('eval')) {
 851                         my @list = split /\n/, $eval;
 852                         my $line;
 853                         for (@list) {
 854                                 dbg($_ . "\n") if isdbg('eval');
 855                         }
 856                 }
 857
 858                 # get rid of any existing sub and try to compile the new one
 859                 no strict 'refs';
 860
 861                 if (exists $Cache{$package}) {
 862                         dbg("find_cmd_name: Redefining $package") if isdbg('command');
 863                         undef $DXCommandmode::{"${package}::"};
 864                         delete $Cache{$package};
 865                 } else {
 866                         dbg("find_cmd_name: Defining $package") if isdbg('command');
 867                 }
 868
 869                 eval $eval;
 870
 871                 $Cache{$package} = {mtime => $mtime } unless $@;
 872         }
 873
 874         return "DXCommandmode::$package";
 875 }
 876
 877 sub send
 878 {
 879         my $self = shift;
 880         if ($self->{gtk}) {
 881                 for (@_) {
 882                         $self->SUPER::send(dd(['cmd',$_]));
 883                 }
 884         } else {
 885                 $self->SUPER::send(@_);
 886         }
 887 }
 888
 889 sub local_send
 890 {
 891         my ($self, $let, $buf) = @_;
 892         if ($self->{state} eq 'prompt' || $self->{state} eq 'talk' || $self->{state} eq 'chat') {
 893                 if ($self->{enhanced}) {
 894                         $self->send_later($let, $buf);
 895                 } else {
 896                         $self->send($buf);
 897                 }
 898         } else {
 899                 $self->delay($buf);
 900         }
 901 }
 902
 903 # send a talk message here
 904 sub talk
 905 {
 906         my ($self, $from, $to, $via, $line, $onode) = @_;
 907         $line =~ s/\\5E/\^/g;
 908         if ($self->{talk}) {
 909                 if ($self->{gtk}) {
 910                         $self->local_send('T', dd(['talk',$to,$from,$via,$line]));
 911                 } else {
 912                         $self->local_send('T', "$to de $from: $line");
 913                 }
 914         }
 915         Log('talk', $to, $from, '<' . ($onode || '*'), $line);
 916         # send a 'not here' message if required
 917         unless ($self->{here} && $from ne $to) {
 918                 my $key = "$to$from";
 919                 unless (exists $nothereslug{$key}) {
 920                         my ($ref, $dxchan);
 921                         if (($ref = Route::get($from)) && ($dxchan = $ref->dxchan)) {
 922                                 my $name = $self->user->name || $to;
 923                                 my $s = $self->user->nothere || $dxchan->msg('nothere', $name);
 924                                 $nothereslug{$key} = $main::systime;
 925                                 $dxchan->talk($to, $from, undef, $s);
 926                         }
 927                 }
 928         }
 929 }
 930
 931 # send an announce
 932 sub announce
 933 {
 934         my $self = shift;
 935         my $line = shift;
 936         my $isolate = shift;
 937         my $to = shift;
 938         my $target = shift;
 939         my $text = shift;
 940         my ($filter, $hops);
 941
 942         if (!$self->{ann_talk} && $to ne $self->{call}) {
 943                 my $call = AnnTalk::is_talk_candidate($_[0], $text);
 944                 return if $call;
 945         }
 946
 947         if ($self->{annfilter}) {
 948                 ($filter, $hops) = $self->{annfilter}->it(@_ );
 949                 return unless $filter;
 950         }
 951
 952         unless ($self->{ann}) {
 953                 return if $_[0] ne $main::myalias && $_[0] ne $main::mycall;
 954         }
 955         return if $target eq 'SYSOP' && $self->{priv} < 5;
 956         my $buf;
 957         if ($self->{gtk}) {
 958                 $buf = dd(['ann', $to, $target, $text, @_])
 959         } else {
 960                 $buf = "$to$target de $_[0]: $text";
 961                 $buf =~ s/\%5E/^/g;
 962                 $buf .= "\a\a" if $self->{beep};
 963         }
 964         $self->local_send($target eq 'WX' ? 'W' : 'N', $buf);
 965 }
 966
 967 # send a chat
 968 sub chat
 969 {
 970         my $self = shift;
 971         my $line = shift;
 972         my $isolate = shift;
 973         my $target = shift;
 974         my $to = shift;
 975         my $text = shift;
 976         my ($filter, $hops);
 977
 978         return unless grep uc $_ eq $target, @{$self->{user}->{group}};
 979
 980         $text =~ s/^\#\d+ //;
 981         my $buf;
 982         if ($self->{gtk}) {
 983                 $buf = dd(['chat', $to, $target, $text, @_])
 984         } else {
 985                 $buf = "$target de $_[0]: $text";
 986                 $buf =~ s/\%5E/^/g;
 987                 $buf .= "\a\a" if $self->{beep};
 988         }
 989         $self->local_send('C', $buf);
 990 }
 991
 992 sub format_dx_spot
 993 {
 994         my $self = shift;
 995
 996         my $t = ztime($_[2]);
 997         my $loc = '';
 998         my $clth = $self->{consort} eq 'local' ? 29 : 30;
 999         my $comment = substr (($_[3] || ''), 0, $clth);
1000         $comment .= ' ' x ($clth - length($comment));
1001         if ($self->{user}->wantgrid) {
1002                 my $ref = DXUser::get_current($_[4]);
1003                 if ($ref) {
1004                         $loc = $ref->qra || '';
1005                         $loc = ' ' . substr($loc, 0, 4) if $loc;
1006                 }
1007         }
1008
1009         if ($self->{user}->wantdxitu) {
1010                 $loc = ' ' . sprintf("%2d", $_[10]) if defined $_[10];
1011                 $comment = substr($comment, 0,  $self->{consort} eq 'local' ? 26 : 27) . ' ' . sprintf("%2d", $_[8]) if defined $_[8];
1012         } elsif ($self->{user}->wantdxcq) {
1013                 $loc = ' ' . sprintf("%2d", $_[11]) if defined $_[11];
1014                 $comment = substr($comment, 0,  $self->{consort} eq 'local' ? 26 : 27) . ' ' . sprintf("%2d", $_[9]) if defined $_[9];
1015         } elsif ($self->{user}->wantusstate) {
1016                 $loc = ' ' . $_[13] if $_[13];
1017                 $comment = substr($comment, 0,  $self->{consort} eq 'local' ? 26 : 27) . ' ' . $_[12] if $_[12];
1018         }
1019
1020         return sprintf "DX de %-7.7s%11.1f  %-12.12s %-s $t$loc", "$_[4]:", $_[0], $_[1], $comment;
1021 }
1022
1023 # send a dx spot
1024 sub dx_spot
1025 {
1026         my $self = shift;
1027         my $line = shift;
1028         my $isolate = shift;
1029         return unless $self->{dx};
1030
1031         my ($filter, $hops);
1032
1033         if ($self->{spotsfilter}) {
1034                 ($filter, $hops) = $self->{spotsfilter}->it(@_ );
1035                 return unless $filter;
1036         }
1037
1038         dbg('spot: "' . join('","', @_) . '"') if isdbg('dxspot');
1039
1040         my $buf;
1041         if ($self->{ve7cc}) {
1042                 $buf = VE7CC::dx_spot($self, @_);
1043         } elsif ($self->{gtk}) {
1044                 my ($dxloc, $byloc);
1045
1046                 my $ref = DXUser::get_current($_[4]);
1047                 if ($ref) {
1048                         $byloc = $ref->qra;
1049                         $byloc = substr($byloc, 0, 4) if $byloc;
1050                 }
1051
1052                 my $spot = $_[1];
1053                 $spot =~ s|/\w{1,4}$||;
1054                 $ref = DXUser::get_current($spot);
1055                 if ($ref) {
1056                         $dxloc = $ref->qra;
1057                         $dxloc = substr($dxloc, 0, 4) if $dxloc;
1058                 }
1059                 $buf = dd(['dx', @_, ($dxloc||''), ($byloc||'')]);
1060
1061         } else {
1062                 $buf = $self->format_dx_spot(@_);
1063                 $buf .= "\a\a" if $self->{beep};
1064                 $buf =~ s/\%5E/^/g;
1065         }
1066
1067         $self->local_send('X', $buf);
1068 }
1069
1070 sub wwv
1071 {
1072         my $self = shift;
1073         my $line = shift;
1074         my $isolate = shift;
1075         my ($filter, $hops);
1076
1077         return unless $self->{wwv};
1078
1079         if ($self->{wwvfilter}) {
1080                 ($filter, $hops) = $self->{wwvfilter}->it(@_[7..$#_] );
1081                 return unless $filter;
1082         }
1083
1084         my $buf;
1085         if ($self->{gtk}) {
1086                 $buf = dd(['wwv', @_])
1087         } else {
1088                 $buf = "WWV de $_[6] <$_[1]>:   SFI=$_[2], A=$_[3], K=$_[4], $_[5]";
1089                 $buf .= "\a\a" if $self->{beep};
1090         }
1091
1092         $self->local_send('V', $buf);
1093 }
1094
1095 sub wcy
1096 {
1097         my $self = shift;
1098         my $line = shift;
1099         my $isolate = shift;
1100         my ($filter, $hops);
1101
1102         return unless $self->{wcy};
1103
1104         if ($self->{wcyfilter}) {
1105                 ($filter, $hops) = $self->{wcyfilter}->it(@_ );
1106                 return unless $filter;
1107         }
1108
1109         my $buf;
1110         if ($self->{gtk}) {
1111                 $buf = dd(['wcy', @_])
1112         } else {
1113                 $buf = "WCY de $_[10] <$_[1]> : K=$_[4] expK=$_[5] A=$_[3] R=$_[6] SFI=$_[2] SA=$_[7] GMF=$_[8] Au=$_[9]";
1114                 $buf .= "\a\a" if $self->{beep};
1115         }
1116         $self->local_send('Y', $buf);
1117 }
1118
1119 # broadcast debug stuff to all interested parties
1120 sub broadcast_debug
1121 {
1122         my $s = shift;                          # the line to be rebroadcast
1123
1124         foreach my $dxchan (DXChannel::get_all_users) {
1125                 next unless $dxchan->{enhanced} && $dxchan->{senddbg};
1126                 if ($dxchan->{gtk}) {
1127                         $dxchan->send_later('L', dd(['db', $s]));
1128                 } else {
1129                         $dxchan->send_later('L', $s);
1130                 }
1131         }
1132 }
1133
1134 sub do_entry_stuff
1135 {
1136         my $self = shift;
1137         my $line = shift;
1138         my @out;
1139
1140         if ($self->state eq 'enterbody') {
1141                 my $loc = $self->{loc} || confess "local var gone missing" ;
1142                 if ($line eq "\032" || $line eq '%1A' || uc $line eq "/EX") {
1143                         no strict 'refs';
1144                         push @out, &{$loc->{endaction}}($self);          # like this for < 5.8.0
1145                         $self->func(undef);
1146                         $self->state('prompt');
1147                 } elsif ($line eq "\031" || uc $line eq "/ABORT" || uc $line eq "/QUIT") {
1148                         push @out, $self->msg('m10');
1149                         delete $loc->{lines};
1150                         delete $self->{loc};
1151                         $self->func(undef);
1152                         $self->state('prompt');
1153                 } else {
1154                         push @{$loc->{lines}}, length($line) > 0 ? $line : " ";
1155                         # i.e. it ain't and end or abort, therefore store the line
1156                 }
1157         } else {
1158                 confess "Invalid state $self->{state}";
1159         }
1160         return @out;
1161 }
1162
1163 sub store_startup_script
1164 {
1165         my $self = shift;
1166         my $loc = $self->{loc} || confess "local var gone missing" ;
1167         my @out;
1168         my $call = $loc->{call} || confess "callsign gone missing";
1169         confess "lines array gone missing" unless ref $loc->{lines};
1170         my $r = Script::store($call, $loc->{lines});
1171         if (defined $r) {
1172                 if ($r) {
1173                         push @out, $self->msg('m19', $call, $r);
1174                 } else {
1175                         push @out, $self->msg('m20', $call);
1176                 }
1177         } else {
1178                 push @out, "error opening startup script $call $!";
1179         }
1180         return @out;
1181 }
1182
1183 # Import any commands contained in any files in import_cmd directory
1184 #
1185 # If the filename has a recogisable callsign as some delimited part
1186 # of it, then this is the user the command will be run as.
1187 #
1188 sub import_cmd
1189 {
1190         # are there any to do in this directory?
1191         return unless -d $cmdimportdir;
1192         unless (opendir(DIR, $cmdimportdir)) {
1193                 LogDbg('err', "can\'t open $cmdimportdir $!");
1194                 return;
1195         }
1196
1197         my @names = readdir(DIR);
1198         closedir(DIR);
1199         my $name;
1200
1201         return unless @names;
1202
1203         foreach $name (@names) {
1204                 next if $name =~ /^\./;
1205
1206                 my $s = Script->new($name, $cmdimportdir);
1207                 if ($s) {
1208                         LogDbg('DXCommand', "Run import cmd file $name");
1209                         my @cat = split /[^A-Za-z0-9]+/, $name;
1210                         my ($call) = grep {is_callsign(uc $_)} @cat;
1211                         $call ||= $main::mycall;
1212                         $call = uc $call;
1213                         my @out;
1214
1215
1216                         $s->inscript(0);        # switch off script checks
1217
1218                         if ($call eq $main::mycall) {
1219                                 @out = $s->run($main::me, 1);
1220                         } else {
1221                                 my $dxchan = DXChannel::get($call);
1222                             if ($dxchan) {
1223                                         @out = $s->run($dxchan, 1);
1224                                 } else {
1225                                         my $u = DXUser::get($call);
1226                                         if ($u) {
1227                                                 $dxchan = $main::me;
1228                                                 my $old = $dxchan->{call};
1229                                                 my $priv = $dxchan->{priv};
1230                                                 my $user = $dxchan->{user};
1231                                                 $dxchan->{call} = $call;
1232                                                 $dxchan->{priv} = $u->priv;
1233                                                 $dxchan->{user} = $u;
1234                                                 @out = $s->run($dxchan, 1);
1235                                                 $dxchan->{call} = $old;
1236                                                 $dxchan->{priv} = $priv;
1237                                                 $dxchan->{user} = $user;
1238                                         } else {
1239                                                 LogDbg('err', "Trying to run import cmd for non-existant user $call");
1240                                         }
1241                                 }
1242                         }
1243                         $s->erase;
1244                         for (@out) {
1245                                 LogDbg('DXCommand', "Import cmd $name/$call: $_");
1246                         }
1247                 } else {
1248                         LogDbg('err', "Failed to open $cmdimportdir/$name $!");
1249                         unlink "$cmdimportdir/$name";
1250                 }
1251         }
1252 }
1253
1254 sub print_find_reply
1255 {
1256         my ($self, $node, $target, $flag, $ms) = @_;
1257         my $sort = $flag == 2 ? "External" : "Local";
1258         $self->send("$sort $target found at $node in $ms ms" );
1259 }
1260
1261 # send the most relevant motd
1262 sub send_motd
1263 {
1264         my $self = shift;
1265         my $motd;
1266
1267         unless ($self->{registered}) {
1268                 $motd = "${main::motd}_nor_$self->{lang}";
1269                 $motd = "${main::motd}_nor" unless -e $motd;
1270         }
1271         $motd = "${main::motd}_$self->{lang}" unless $motd && -e $motd;
1272         $motd = $main::motd unless $motd && -e $motd;
1273         if ($self->conn->ax25) {
1274                 if ($motd) {
1275                         $motd = "${motd}_ax25" if -e "${motd}_ax25";
1276                 } else {
1277                         $motd = "${main::motd}_ax25" if -e "${main::motd}_ax25";
1278                 }
1279         }
1280         $self->send_file($motd) if -e $motd;
1281 }
1282
1283
1284 # Punt off a long running command into a separate process
1285 #
1286 # This is called from commands to run some potentially long running
1287 # function. The process forks and then runs the function and returns
1288 # the result back to the cmd.
1289 #
1290 # NOTE: this merely forks the current process and then runs the cmd in that (current) context.
1291 #       IT DOES NOT START UP SOME NEW PROGRAM AND RELIES ON THE FACT THAT IT IS RUNNING DXSPIDER
1292 #       THE CURRENT CONTEXT!!
1293 #
1294 # call: $self->spawn_cmd($original_cmd_line, \<function>, [cb => sub{...}], [prefix => "cmd> "], [progress => 0|1], [args => [...]]);
1295 sub spawn_cmd
1296 {
1297         my $self = shift;
1298         my $line = shift;
1299         my $cmdref = shift;
1300         my $call = $self->{call};
1301         my %args = @_;
1302         my @out;
1303
1304         my $cb = delete $args{cb};
1305         my $prefix = delete $args{prefix};
1306         my $progress = delete $args{progress};
1307         my $args = delete $args{args} || [];
1308         my $t0 = [gettimeofday];
1309
1310         no strict 'refs';
1311
1312         # just behave normally if something has set the "one-shot" _nospawn in the channel
1313         if ($self->{_nospawn}) {
1314                 eval { @out = $cmdref->(@$args); };
1315                 if ($@) {
1316                         DXDebug::dbgprintring(25);
1317                         push @out, DXDebug::shortmess($@);
1318                 }
1319                 return @out;
1320         }
1321
1322         my $fc = Mojo::IOLoop::Subprocess->new;
1323 #       $fc->serializer(\&encode_json);
1324 #       $fc->deserializer(\&decode_json);
1325         $fc->run(
1326                          sub {
1327                                  my $subpro = shift;
1328                                  if (isdbg('progress')) {
1329                                          my $s = "line: $line";
1330                                          $s .= ", args: " . join(', ', @$args) if $args && @$args;
1331                                          dbg($s);
1332                                  }
1333                                  eval { @out = $cmdref->(@$args); };
1334                                  if ($@) {
1335                                          DXDebug::dbgprintring(25);
1336                                          push @out, DXDebug::shortmess($@);
1337                                  }
1338                                  return @out;
1339                          },
1340 #                        $args,
1341                          sub {
1342                                  my ($fc, $err, @res) = @_;
1343                                  my $dxchan = DXChannel::get($call);
1344                                  return unless $dxchan;
1345
1346                                  if ($err) {
1347                                          my $s = "DXProt::spawn_cmd: call $call error $err";
1348                                          dbg($s) if isdbg('chan');
1349                                          $dxchan->send($s);
1350                                          return;
1351                                  }
1352                                  if ($cb) {
1353                                          # transform output if required
1354                                          @res = $cb->($dxchan, @res);
1355                                  }
1356                                  if (@res) {
1357                                          if (defined $prefix) {
1358                                                  $dxchan->send(map {"$prefix$_"} @res);
1359                                          } else {
1360                                                  $dxchan->send(@res);
1361                                          }
1362                                  }
1363                                  diffms("by $call", $line, $t0, scalar @res) if isdbg('progress');
1364                          });
1365
1366         return @out;
1367 }
1368
1369 sub user_count
1370 {
1371         return ($users, $maxusers);
1372 }
1373 1;
1374 __END__