3 # This module impliments the user facing command mode for a dx cluster
5 # Copyright (c) 1998 Dirk Koopman G1TLH
10 package DXCommandmode;
34 use vars qw(%Cache %cmd_cache $errstr %aliases $scriptbase);
36 %Cache = (); # cache of dynamically loaded routine's mod times
37 %cmd_cache = (); # cache of short names
38 $errstr = (); # error string from eval
39 %aliases = (); # aliases for (parts of) commands
40 $scriptbase = "$main::root/scripts"; # the place where all users start scripts go
43 # obtain a new connection this is derived from dxchannel
48 my $self = DXChannel::alloc(@_);
52 # this is how a a connection starts, you get a hello message and the motd with
53 # possibly some other messages asking you to set various things up if you are
54 # new (or nearly new and slacking) user.
58 my ($self, $line, $sort) = @_;
59 my $user = $self->{user};
60 my $call = $self->{call};
61 my $name = $user->{name};
63 $self->{name} = $name ? $name : $call;
64 $self->send($self->msg('l2',$self->{name}));
65 $self->send_file($main::motd) if (-e $main::motd);
66 $self->state('prompt'); # a bit of room for further expansion, passwords etc
67 $self->{priv} = $user->priv || 0;
68 $self->{lang} = $user->lang || 'en';
69 $self->{pagelth} = $user->pagelth || 20;
70 $self->{priv} = 0 if $line =~ /^(ax|te)/; # set the connection priv to 0 - can be upgraded later
71 $self->{consort} = $line; # save the connection type
73 # set some necessary flags on the user if they are connecting
74 $self->{beep} = $user->wantbeep;
75 $self->{ann} = $user->wantann;
76 $self->{wwv} = $user->wantwwv;
77 $self->{wcy} = $user->wantwcy;
78 $self->{talk} = $user->wanttalk;
79 $self->{wx} = $user->wantwx;
80 $self->{dx} = $user->wantdx;
81 $self->{logininfo} = $user->wantlogininfo;
84 # clean up qra locators
86 $qra = undef if ($qra && !DXBearing::is_qra($qra));
89 my $long = $user->long;
90 $user->qra(DXBearing::lltoqra($lat, $long)) if (defined $lat && defined $long);
93 # add yourself to the database
94 my $node = DXNode->get($main::mycall) or die "$main::mycall not allocated in DXNode database";
95 my $cuser = DXNodeuser->new($self, $node, $call, 0, 1);
96 $node->dxchan($self) if $call eq $main::myalias; # send all output for mycall to myalias
98 # issue a pc16 to everybody interested
99 my $nchan = DXChannel->get($main::mycall);
100 my @pc16 = DXProt::pc16($nchan, $cuser);
102 DXProt::broadcast_all_ak1a($_);
104 Log('DXCommand', "$call connected");
106 # send prompts and things
107 my $info = DXCluster::cluster();
108 $self->send("Cluster:$info");
109 $self->send($self->msg('namee1')) if !$user->name;
110 $self->send($self->msg('qthe1')) if !$user->qth;
111 $self->send($self->msg('qll')) if !$user->qra || (!$user->lat && !$user->long);
112 $self->send($self->msg('hnodee1')) if !$user->qth;
113 $self->send($self->msg('m9')) if DXMsg::for_me($call);
114 $self->send($self->msg('pr', $call));
117 if (!$user->wantecho) {
118 $self->send_now('E', "0");
119 $self->send($self->msg('echow'));
122 $self->tell_login('loginu');
127 # This is the normal command prompt driver
136 # remove leading and trailing spaces
137 $cmdline =~ s/^\s*(.*)\s*$/$1/;
139 if ($self->{state} eq 'page') {
140 my $i = $self->{pagelth};
141 my $ref = $self->{pagedata};
144 # abort if we get a line starting in with a
145 if ($cmdline =~ /^a/io) {
150 # send a tranche of data
151 while ($i-- > 0 && @$ref) {
152 my $line = shift @$ref;
153 $line =~ s/\s+$//o; # why am having to do this?
157 # reset state if none or else chuck out an intermediate prompt
159 $tot -= $self->{pagelth};
160 $self->send($self->msg('page', $tot));
162 $self->state('prompt');
164 } elsif ($self->{state} eq 'sysop') {
165 my $passwd = $self->{user}->passwd;
166 my @pw = split / */, $passwd;
168 my @l = @{$self->{passwd}};
169 my $str = "$pw[$l[0]].*$pw[$l[1]].*$pw[$l[2]].*$pw[$l[3]].*$pw[$l[4]]";
170 if ($cmdline =~ /$str/) {
171 $self->{priv} = $self->{user}->priv;
173 $self->send($self->msg('sorry'));
176 $self->send($self->msg('sorry'));
178 delete $self->{passwd};
179 $self->state('prompt');
180 } elsif ($self->{state} eq 'talk') {
181 if ($cmdline =~ m{^(?:/EX|/ABORT)}i) {
182 for (@{$self->{talklist}}) {
184 my ($to, $via) = $ent =~ /(\S+)>(\S+)/;
185 my $dxchan = DXChannel->get($via);
186 $dxchan->talk($self->{call}, $to, $via, $self->msg('talkend')) if $dxchan;
188 $self->state('prompt');
189 delete $self->{talklist};
190 } elsif ($cmdline =~ m(^/\w+)) {
192 $self->send_ans(run_cmd($self, $cmdline));
193 $self->send($self->talk_prompt);
194 } elsif ($self->{talklist} && @{$self->{talklist}}) {
195 # send what has been said to whoever is in this person's talk list
196 for (@{$self->{talklist}}) {
198 my ($to, $via) = $ent =~ /(\S+)>(\S+)/;
199 my $dxchan = DXChannel->get($via);
200 if ($dxchan && DXCluster->get_exact($to)) {
201 $dxchan->talk($self->{call}, $to, $via, $cmdline);
203 $self->send($self->msg('disc2', $via ? $via : $to));
204 my @l = grep { $_ ne $ent } @{$self->{talklist}};
206 $self->{talklist} = \@l;
208 delete $self->{talklist};
209 $self->state('prompt');
213 $self->send($self->talk_prompt) if $self->{state} eq 'talk';
216 $self->state('prompt');
219 $self->send_ans(run_cmd($self, $cmdline));
222 # send a prompt only if we are in a prompt state
223 $self->prompt() if $self->{state} =~ /^prompt/o;
230 for (@{$self->{talklist}}) {
231 my ($to, $via) = /(\S+)>(\S+)/;
234 return $self->msg('talkprompt', join(',', @call));
238 # send a load of stuff to a command user with page prompting
246 if ($self->{pagelth} && @_ > $self->{pagelth}) {
248 for ($i = $self->{pagelth}; $i-- > 0; ) {
250 $line =~ s/\s+$//o; # why am having to do this?
253 $self->{pagedata} = \@_;
254 $self->state('page');
255 $self->send($self->msg('page', scalar @_));
258 $self->send($_) if $_;
263 # this is the thing that runs the command, it is done like this for the
264 # benefit of remote command execution
270 my $user = $self->{user};
271 my $call = $self->{call};
276 my $c = qq{ \@ans = $self->{func}(\$self, \$cmdline) };
277 dbg('eval', "stored func cmd = $c\n");
280 return ("Syserr: Eval err $errstr on stored func $self->{func}", $@);
284 return () if length $cmdline == 0;
287 $cmdline =~ s|//|/|og;
289 # split the command line up into parts, the first part is the command
290 my ($cmd, $args) = split /\s+/, $cmdline, 2;
291 $args = "" unless $args;
297 dbg('command', "cmd: $cmd");
299 # alias it if possible
300 my $acmd = CmdAlias::get_cmd($cmd);
302 ($cmd, $args) = split /\s+/, "$acmd $args", 2;
303 $args = "" unless $args;
304 dbg('command', "aliased cmd: $cmd $args");
307 # first expand out the entry to a command
308 ($path, $fcmd) = search($main::localcmd, $cmd, "pl");
309 ($path, $fcmd) = search($main::cmd, $cmd, "pl") if !$path || !$fcmd;
312 dbg('command', "path: $cmd cmd: $fcmd");
314 my $package = find_cmd_name($path, $fcmd);
315 @ans = (0) if !$package ;
318 dbg('command', "package: $package");
320 unless (exists $Cache{$package}->{'sub'}) {
321 $c = eval $Cache{$package}->{'eval'};
323 return DXDebug::shortmess($@);
325 $Cache{$package}->{'sub'} = $c;
327 $c = $Cache{$package}->{'sub'};
329 @ans = &{$c}($self, $args);
334 return (DXDebug::shortmess($@));
338 dbg('command', "cmd: $cmd not found");
339 return ($self->msg('e1'));
349 # This is called from inside the main cluster processing loop and is used
350 # for despatching commands that are doing some long processing job
355 my @dxchan = DXChannel->get_all();
358 foreach $dxchan (@dxchan) {
359 next if $dxchan->sort ne 'U';
361 # send a prompt if no activity out on this channel
362 if ($t >= $dxchan->t + $main::user_interval) {
363 $dxchan->prompt() if $dxchan->{state} =~ /^prompt/o;
370 # finish up a user context
376 my $call = $self->call;
378 # I was the last node visited
379 $self->user->node($main::mycall);
382 if ($conn && -e "$main::data/logout") {
383 open(I, "$main::data/logout") or confess;
386 $self->send_now('D', @in);
390 if ($call eq $main::myalias) { # unset the channel if it is us really
391 my $node = DXNode->get($main::mycall);
395 # issue a pc17 to everybody interested
396 my $nchan = DXChannel->get($main::mycall);
397 my $pc17 = $nchan->pc17($self);
398 DXProt::broadcast_all_ak1a($pc17);
400 # send info to all logged in thingies
401 $self->tell_login('logoutu');
403 Log('DXCommand', "$call disconnected");
404 my $ref = DXCluster->get_exact($call);
409 # short cut to output a prompt
415 $self->send($self->msg($self->here ? 'pr' : 'pr2', $self->call));
418 # broadcast a message to all users [except those mentioned after buffer]
421 my $pkg = shift; # ignored
422 my $s = shift; # the line to be rebroadcast
423 my @except = @_; # to all channels EXCEPT these (dxchannel refs)
424 my @list = DXChannel->get_all(); # just in case we are called from some funny object
425 my ($dxchan, $except);
427 L: foreach $dxchan (@list) {
428 next if !$dxchan->sort eq 'U'; # only interested in user channels
429 foreach $except (@except) {
430 next L if $except == $dxchan; # ignore channels in the 'except' list
432 $dxchan->send($s); # send it
436 # gimme all the users
439 my @list = DXChannel->get_all();
442 foreach $ref (@list) {
443 push @out, $ref if $ref->sort eq 'U';
448 # run a script for this user
452 my $silent = shift || 0;
457 # search for the command in the cache of short->long form commands
462 my ($path, $short_cmd, $suffix) = @_;
465 # commands are lower case
466 $short_cmd = lc $short_cmd;
467 dbg('command', "command: $path $short_cmd\n");
469 # do some checking for funny characters
470 return () if $short_cmd =~ /\/$/;
472 # return immediately if we have it
473 ($apath, $acmd) = split ',', $cmd_cache{$short_cmd} if $cmd_cache{$short_cmd};
474 if ($apath && $acmd) {
475 dbg('command', "cached $short_cmd = ($apath, $acmd)\n");
476 return ($apath, $acmd);
480 my @parts = split '/', $short_cmd;
487 for ($i = 0; $i < @parts; $i++) {
489 opendir(D, $curdir) or confess "can't open $curdir $!";
493 foreach $l (sort @ls) {
495 if ($i < $#parts) { # we are dealing with directories
496 if ((-d "$curdir/$l") && $p eq substr($l, 0, length $p)) {
497 dbg('command', "got dir: $curdir/$l\n");
502 } else { # we are dealing with commands
503 @lparts = split /\./, $l;
504 next if $lparts[$#lparts] ne $suffix; # only look for .$suffix files
505 if ($p eq substr($l, 0, length $p)) {
506 pop @lparts; # remove the suffix
507 $l = join '.', @lparts;
508 # chop $dirfn; # remove trailing /
509 $dirfn = "" unless $dirfn;
510 $cmd_cache{"$short_cmd"} = join(',', ($path, "$dirfn$l")); # cache it
511 dbg('command', "got path: $path cmd: $dirfn$l\n");
512 return ($path, "$dirfn$l");
520 # clear the command name cache
527 # the persistant execution of things from the command directories
530 # This allows perl programs to call functions dynamically
532 # This has been nicked directly from the perlembed pages
535 #require Devel::Symdump;
537 sub valid_package_name {
539 $string =~ s/([^A-Za-z0-9\/])/sprintf("_%2x",unpack("C",$1))/eg;
541 #second pass only for words starting with a digit
542 $string =~ s|/(\d)|sprintf("/_%2x",unpack("C",$1))|eg;
544 #Dress it up as a real package name
545 $string =~ s/\//_/og;
549 # find a cmd reference
550 # this is really for use in user written stubs
552 # use the result as a symbolic reference:-
555 # @out = &$r($self, $line);
564 # first expand out the entry to a command
565 my ($path, $fcmd) = search($main::localcmd, $cmd, "pl");
566 ($path, $fcmd) = search($main::cmd, $cmd, "pl") if !$path || !$fcmd;
568 # make sure it is loaded
569 $r = find_cmd_name($path, $fcmd);
575 # this bit of magic finds a command in the offered directory
579 my $package = valid_package_name($cmdname);
580 my $filename = "$path/$cmdname.pl";
581 my $mtime = -M $filename;
583 # return if we can't find it
585 unless (defined $mtime) {
586 $errstr = DXM::msg('e1');
590 if(defined $Cache{$package}->{mtime} &&$Cache{$package}->{mtime} <= $mtime) {
591 #we have compiled this subroutine already,
592 #it has not been updated on disk, nothing left to do
593 #print STDERR "already compiled $package->handler\n";
597 my $sub = readfilestr($filename);
599 $errstr = "Syserr: can't open '$filename' $!";
603 #wrap the code into a subroutine inside our unique package
604 my $eval = qq( sub { $sub } );
607 my @list = split /\n/, $eval;
610 dbg('eval', $_, "\n");
614 $Cache{$package} = {mtime => $mtime, 'eval' => $eval };
620 # send a talk message here
623 my ($self, $from, $to, $via, $line) = @_;
624 $line =~ s/\\5E/\^/g;
625 $self->send("$to de $from $line") if $self->{talk};
626 Log('talk', $to, $from, $main::mycall, $line);